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/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include <linux/btrfs.h>
35 #include "extent_io.h"
36 #include "extent_map.h"
37 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
51 #define BTRFS_MAX_MIRRORS 3
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for storing
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
145 #define BTRFS_DEV_REPLACE_DEVID 0
148 * the max metadata block size. This limit is somewhat artificial,
149 * but the memmove costs go through the roof for larger blocks.
151 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
154 * we can actually store much bigger names, but lets not confuse the rest
157 #define BTRFS_NAME_LEN 255
160 * Theoretical limit is larger, but we keep this down to a sane
161 * value. That should limit greatly the possibility of collisions on
164 #define BTRFS_LINK_MAX 65535U
166 /* 32 bytes in various csum fields */
167 #define BTRFS_CSUM_SIZE 32
170 #define BTRFS_CSUM_TYPE_CRC32 0
172 static int btrfs_csum_sizes
[] = { 4, 0 };
174 /* four bytes for CRC32 */
175 #define BTRFS_EMPTY_DIR_SIZE 0
177 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
178 #define REQ_GET_READ_MIRRORS (1 << 30)
180 #define BTRFS_FT_UNKNOWN 0
181 #define BTRFS_FT_REG_FILE 1
182 #define BTRFS_FT_DIR 2
183 #define BTRFS_FT_CHRDEV 3
184 #define BTRFS_FT_BLKDEV 4
185 #define BTRFS_FT_FIFO 5
186 #define BTRFS_FT_SOCK 6
187 #define BTRFS_FT_SYMLINK 7
188 #define BTRFS_FT_XATTR 8
189 #define BTRFS_FT_MAX 9
191 /* ioprio of readahead is set to idle */
192 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
194 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
197 * The key defines the order in the tree, and so it also defines (optimal)
200 * objectid corresponds to the inode number.
202 * type tells us things about the object, and is a kind of stream selector.
203 * so for a given inode, keys with type of 1 might refer to the inode data,
204 * type of 2 may point to file data in the btree and type == 3 may point to
207 * offset is the starting byte offset for this key in the stream.
209 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
210 * in cpu native order. Otherwise they are identical and their sizes
211 * should be the same (ie both packed)
213 struct btrfs_disk_key
{
217 } __attribute__ ((__packed__
));
223 } __attribute__ ((__packed__
));
225 struct btrfs_mapping_tree
{
226 struct extent_map_tree map_tree
;
229 struct btrfs_dev_item
{
230 /* the internal btrfs device id */
233 /* size of the device */
239 /* optimal io alignment for this device */
242 /* optimal io width for this device */
245 /* minimal io size for this device */
248 /* type and info about this device */
251 /* expected generation for this device */
255 * starting byte of this partition on the device,
256 * to allow for stripe alignment in the future
260 /* grouping information for allocation decisions */
263 /* seek speed 0-100 where 100 is fastest */
266 /* bandwidth 0-100 where 100 is fastest */
269 /* btrfs generated uuid for this device */
270 u8 uuid
[BTRFS_UUID_SIZE
];
272 /* uuid of FS who owns this device */
273 u8 fsid
[BTRFS_UUID_SIZE
];
274 } __attribute__ ((__packed__
));
276 struct btrfs_stripe
{
279 u8 dev_uuid
[BTRFS_UUID_SIZE
];
280 } __attribute__ ((__packed__
));
283 /* size of this chunk in bytes */
286 /* objectid of the root referencing this chunk */
292 /* optimal io alignment for this chunk */
295 /* optimal io width for this chunk */
298 /* minimal io size for this chunk */
301 /* 2^16 stripes is quite a lot, a second limit is the size of a single
306 /* sub stripes only matter for raid10 */
308 struct btrfs_stripe stripe
;
309 /* additional stripes go here */
310 } __attribute__ ((__packed__
));
312 #define BTRFS_FREE_SPACE_EXTENT 1
313 #define BTRFS_FREE_SPACE_BITMAP 2
315 struct btrfs_free_space_entry
{
319 } __attribute__ ((__packed__
));
321 struct btrfs_free_space_header
{
322 struct btrfs_disk_key location
;
326 } __attribute__ ((__packed__
));
328 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
330 BUG_ON(num_stripes
== 0);
331 return sizeof(struct btrfs_chunk
) +
332 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
335 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
336 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
341 #define BTRFS_FS_STATE_ERROR 0
342 #define BTRFS_FS_STATE_REMOUNTING 1
343 #define BTRFS_FS_STATE_TRANS_ABORTED 2
345 /* Super block flags */
346 /* Errors detected */
347 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
349 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
350 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
352 #define BTRFS_BACKREF_REV_MAX 256
353 #define BTRFS_BACKREF_REV_SHIFT 56
354 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
355 BTRFS_BACKREF_REV_SHIFT)
357 #define BTRFS_OLD_BACKREF_REV 0
358 #define BTRFS_MIXED_BACKREF_REV 1
361 * every tree block (leaf or node) starts with this header.
363 struct btrfs_header
{
364 /* these first four must match the super block */
365 u8 csum
[BTRFS_CSUM_SIZE
];
366 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
367 __le64 bytenr
; /* which block this node is supposed to live in */
370 /* allowed to be different from the super from here on down */
371 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
376 } __attribute__ ((__packed__
));
378 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
379 sizeof(struct btrfs_header)) / \
380 sizeof(struct btrfs_key_ptr))
381 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
382 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
383 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
384 sizeof(struct btrfs_item) - \
385 sizeof(struct btrfs_file_extent_item))
386 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
387 sizeof(struct btrfs_item) -\
388 sizeof(struct btrfs_dir_item))
392 * this is a very generous portion of the super block, giving us
393 * room to translate 14 chunks with 3 stripes each.
395 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
396 #define BTRFS_LABEL_SIZE 256
399 * just in case we somehow lose the roots and are not able to mount,
400 * we store an array of the roots from previous transactions
403 #define BTRFS_NUM_BACKUP_ROOTS 4
404 struct btrfs_root_backup
{
406 __le64 tree_root_gen
;
409 __le64 chunk_root_gen
;
412 __le64 extent_root_gen
;
421 __le64 csum_root_gen
;
431 u8 extent_root_level
;
435 /* future and to align */
437 } __attribute__ ((__packed__
));
440 * the super block basically lists the main trees of the FS
441 * it currently lacks any block count etc etc
443 struct btrfs_super_block
{
444 u8 csum
[BTRFS_CSUM_SIZE
];
445 /* the first 4 fields must match struct btrfs_header */
446 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
447 __le64 bytenr
; /* this block number */
450 /* allowed to be different from the btrfs_header from here own down */
457 /* this will help find the new super based on the log root */
458 __le64 log_root_transid
;
461 __le64 root_dir_objectid
;
467 __le32 sys_chunk_array_size
;
468 __le64 chunk_root_generation
;
470 __le64 compat_ro_flags
;
471 __le64 incompat_flags
;
476 struct btrfs_dev_item dev_item
;
478 char label
[BTRFS_LABEL_SIZE
];
480 __le64 cache_generation
;
482 /* future expansion */
484 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
485 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
486 } __attribute__ ((__packed__
));
489 * Compat flags that we support. If any incompat flags are set other than the
490 * ones specified below then we will fail to mount
492 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
493 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
494 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
495 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
497 * some patches floated around with a second compression method
498 * lets save that incompat here for when they do get in
499 * Note we don't actually support it, we're just reserving the
502 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
505 * older kernels tried to do bigger metadata blocks, but the
506 * code was pretty buggy. Lets not let them try anymore.
508 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
510 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
511 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
512 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
514 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
515 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
516 #define BTRFS_FEATURE_INCOMPAT_SUPP \
517 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
518 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
519 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
520 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
521 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
522 BTRFS_FEATURE_INCOMPAT_RAID56 | \
523 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
524 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
527 * A leaf is full of items. offset and size tell us where to find
528 * the item in the leaf (relative to the start of the data area)
531 struct btrfs_disk_key key
;
534 } __attribute__ ((__packed__
));
537 * leaves have an item area and a data area:
538 * [item0, item1....itemN] [free space] [dataN...data1, data0]
540 * The data is separate from the items to get the keys closer together
544 struct btrfs_header header
;
545 struct btrfs_item items
[];
546 } __attribute__ ((__packed__
));
549 * all non-leaf blocks are nodes, they hold only keys and pointers to
552 struct btrfs_key_ptr
{
553 struct btrfs_disk_key key
;
556 } __attribute__ ((__packed__
));
559 struct btrfs_header header
;
560 struct btrfs_key_ptr ptrs
[];
561 } __attribute__ ((__packed__
));
564 * btrfs_paths remember the path taken from the root down to the leaf.
565 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
566 * to any other levels that are present.
568 * The slots array records the index of the item or block pointer
569 * used while walking the tree.
572 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
573 int slots
[BTRFS_MAX_LEVEL
];
574 /* if there is real range locking, this locks field will change */
575 int locks
[BTRFS_MAX_LEVEL
];
577 /* keep some upper locks as we walk down */
581 * set by btrfs_split_item, tells search_slot to keep all locks
582 * and to force calls to keep space in the nodes
584 unsigned int search_for_split
:1;
585 unsigned int keep_locks
:1;
586 unsigned int skip_locking
:1;
587 unsigned int leave_spinning
:1;
588 unsigned int search_commit_root
:1;
589 unsigned int really_keep_locks
:1;
593 * items in the extent btree are used to record the objectid of the
594 * owner of the block and the number of references
597 struct btrfs_extent_item
{
601 } __attribute__ ((__packed__
));
603 struct btrfs_extent_item_v0
{
605 } __attribute__ ((__packed__
));
607 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
608 sizeof(struct btrfs_item))
610 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
611 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
613 /* following flags only apply to tree blocks */
615 /* use full backrefs for extent pointers in the block */
616 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
619 * this flag is only used internally by scrub and may be changed at any time
620 * it is only declared here to avoid collisions
622 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
624 struct btrfs_tree_block_info
{
625 struct btrfs_disk_key key
;
627 } __attribute__ ((__packed__
));
629 struct btrfs_extent_data_ref
{
634 } __attribute__ ((__packed__
));
636 struct btrfs_shared_data_ref
{
638 } __attribute__ ((__packed__
));
640 struct btrfs_extent_inline_ref
{
643 } __attribute__ ((__packed__
));
645 /* old style backrefs item */
646 struct btrfs_extent_ref_v0
{
651 } __attribute__ ((__packed__
));
654 /* dev extents record free space on individual devices. The owner
655 * field points back to the chunk allocation mapping tree that allocated
656 * the extent. The chunk tree uuid field is a way to double check the owner
658 struct btrfs_dev_extent
{
660 __le64 chunk_objectid
;
663 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
664 } __attribute__ ((__packed__
));
666 struct btrfs_inode_ref
{
670 } __attribute__ ((__packed__
));
672 struct btrfs_inode_extref
{
673 __le64 parent_objectid
;
678 } __attribute__ ((__packed__
));
680 struct btrfs_timespec
{
683 } __attribute__ ((__packed__
));
685 enum btrfs_compression_type
{
686 BTRFS_COMPRESS_NONE
= 0,
687 BTRFS_COMPRESS_ZLIB
= 1,
688 BTRFS_COMPRESS_LZO
= 2,
689 BTRFS_COMPRESS_TYPES
= 2,
690 BTRFS_COMPRESS_LAST
= 3,
693 struct btrfs_inode_item
{
694 /* nfs style generation number */
696 /* transid that last touched this inode */
708 /* modification sequence number for NFS */
712 * a little future expansion, for more than this we can
713 * just grow the inode item and version it
716 struct btrfs_timespec atime
;
717 struct btrfs_timespec ctime
;
718 struct btrfs_timespec mtime
;
719 struct btrfs_timespec otime
;
720 } __attribute__ ((__packed__
));
722 struct btrfs_dir_log_item
{
724 } __attribute__ ((__packed__
));
726 struct btrfs_dir_item
{
727 struct btrfs_disk_key location
;
732 } __attribute__ ((__packed__
));
734 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
736 struct btrfs_root_item
{
737 struct btrfs_inode_item inode
;
743 __le64 last_snapshot
;
746 struct btrfs_disk_key drop_progress
;
751 * The following fields appear after subvol_uuids+subvol_times
756 * This generation number is used to test if the new fields are valid
757 * and up to date while reading the root item. Everytime the root item
758 * is written out, the "generation" field is copied into this field. If
759 * anyone ever mounted the fs with an older kernel, we will have
760 * mismatching generation values here and thus must invalidate the
761 * new fields. See btrfs_update_root and btrfs_find_last_root for
763 * the offset of generation_v2 is also used as the start for the memset
764 * when invalidating the fields.
766 __le64 generation_v2
;
767 u8 uuid
[BTRFS_UUID_SIZE
];
768 u8 parent_uuid
[BTRFS_UUID_SIZE
];
769 u8 received_uuid
[BTRFS_UUID_SIZE
];
770 __le64 ctransid
; /* updated when an inode changes */
771 __le64 otransid
; /* trans when created */
772 __le64 stransid
; /* trans when sent. non-zero for received subvol */
773 __le64 rtransid
; /* trans when received. non-zero for received subvol */
774 struct btrfs_timespec ctime
;
775 struct btrfs_timespec otime
;
776 struct btrfs_timespec stime
;
777 struct btrfs_timespec rtime
;
778 __le64 reserved
[8]; /* for future */
779 } __attribute__ ((__packed__
));
782 * this is used for both forward and backward root refs
784 struct btrfs_root_ref
{
788 } __attribute__ ((__packed__
));
790 struct btrfs_disk_balance_args
{
792 * profiles to operate on, single is denoted by
793 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
803 /* devid subset filter [pstart..pend) */
807 /* btrfs virtual address space subset filter [vstart..vend) */
812 * profile to convert to, single is denoted by
813 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
817 /* BTRFS_BALANCE_ARGS_* */
821 } __attribute__ ((__packed__
));
824 * store balance parameters to disk so that balance can be properly
825 * resumed after crash or unmount
827 struct btrfs_balance_item
{
828 /* BTRFS_BALANCE_* */
831 struct btrfs_disk_balance_args data
;
832 struct btrfs_disk_balance_args meta
;
833 struct btrfs_disk_balance_args sys
;
836 } __attribute__ ((__packed__
));
838 #define BTRFS_FILE_EXTENT_INLINE 0
839 #define BTRFS_FILE_EXTENT_REG 1
840 #define BTRFS_FILE_EXTENT_PREALLOC 2
842 struct btrfs_file_extent_item
{
844 * transaction id that created this extent
848 * max number of bytes to hold this extent in ram
849 * when we split a compressed extent we can't know how big
850 * each of the resulting pieces will be. So, this is
851 * an upper limit on the size of the extent in ram instead of
857 * 32 bits for the various ways we might encode the data,
858 * including compression and encryption. If any of these
859 * are set to something a given disk format doesn't understand
860 * it is treated like an incompat flag for reading and writing,
865 __le16 other_encoding
; /* spare for later use */
867 /* are we inline data or a real extent? */
871 * disk space consumed by the extent, checksum blocks are included
875 __le64 disk_num_bytes
;
877 * the logical offset in file blocks (no csums)
878 * this extent record is for. This allows a file extent to point
879 * into the middle of an existing extent on disk, sharing it
880 * between two snapshots (useful if some bytes in the middle of the
881 * extent have changed
885 * the logical number of file blocks (no csums included). This
886 * always reflects the size uncompressed and without encoding.
890 } __attribute__ ((__packed__
));
892 struct btrfs_csum_item
{
894 } __attribute__ ((__packed__
));
896 struct btrfs_dev_stats_item
{
898 * grow this item struct at the end for future enhancements and keep
899 * the existing values unchanged
901 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
902 } __attribute__ ((__packed__
));
904 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
905 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
906 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
907 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
908 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
909 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
910 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
912 struct btrfs_dev_replace
{
913 u64 replace_state
; /* see #define above */
914 u64 time_started
; /* seconds since 1-Jan-1970 */
915 u64 time_stopped
; /* seconds since 1-Jan-1970 */
916 atomic64_t num_write_errors
;
917 atomic64_t num_uncorrectable_read_errors
;
920 u64 committed_cursor_left
;
921 u64 cursor_left_last_write_of_item
;
924 u64 cont_reading_from_srcdev_mode
; /* see #define above */
927 int item_needs_writeback
;
928 struct btrfs_device
*srcdev
;
929 struct btrfs_device
*tgtdev
;
932 atomic_t nesting_level
;
933 struct mutex lock_finishing_cancel_unmount
;
934 struct mutex lock_management_lock
;
937 struct btrfs_scrub_progress scrub_progress
;
940 struct btrfs_dev_replace_item
{
942 * grow this item struct at the end for future enhancements and keep
943 * the existing values unchanged
948 __le64 cont_reading_from_srcdev_mode
;
950 __le64 replace_state
;
953 __le64 num_write_errors
;
954 __le64 num_uncorrectable_read_errors
;
955 } __attribute__ ((__packed__
));
957 /* different types of block groups (and chunks) */
958 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
959 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
960 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
961 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
962 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
963 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
964 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
965 #define BTRFS_BLOCK_GROUP_RAID5 (1 << 7)
966 #define BTRFS_BLOCK_GROUP_RAID6 (1 << 8)
967 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
969 enum btrfs_raid_types
{
980 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
981 BTRFS_BLOCK_GROUP_SYSTEM | \
982 BTRFS_BLOCK_GROUP_METADATA)
984 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
985 BTRFS_BLOCK_GROUP_RAID1 | \
986 BTRFS_BLOCK_GROUP_RAID5 | \
987 BTRFS_BLOCK_GROUP_RAID6 | \
988 BTRFS_BLOCK_GROUP_DUP | \
989 BTRFS_BLOCK_GROUP_RAID10)
991 * We need a bit for restriper to be able to tell when chunks of type
992 * SINGLE are available. This "extended" profile format is used in
993 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
994 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
995 * to avoid remappings between two formats in future.
997 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
999 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1000 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1002 static inline u64
chunk_to_extended(u64 flags
)
1004 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1005 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1009 static inline u64
extended_to_chunk(u64 flags
)
1011 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1014 struct btrfs_block_group_item
{
1016 __le64 chunk_objectid
;
1018 } __attribute__ ((__packed__
));
1021 * is subvolume quota turned on?
1023 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1025 * SCANNING is set during the initialization phase
1027 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1029 * Some qgroup entries are known to be out of date,
1030 * either because the configuration has changed in a way that
1031 * makes a rescan necessary, or because the fs has been mounted
1032 * with a non-qgroup-aware version.
1033 * Turning qouta off and on again makes it inconsistent, too.
1035 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1037 #define BTRFS_QGROUP_STATUS_VERSION 1
1039 struct btrfs_qgroup_status_item
{
1042 * the generation is updated during every commit. As older
1043 * versions of btrfs are not aware of qgroups, it will be
1044 * possible to detect inconsistencies by checking the
1045 * generation on mount time
1049 /* flag definitions see above */
1053 * only used during scanning to record the progress
1054 * of the scan. It contains a logical address
1057 } __attribute__ ((__packed__
));
1059 struct btrfs_qgroup_info_item
{
1065 } __attribute__ ((__packed__
));
1067 /* flags definition for qgroup limits */
1068 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1069 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1070 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1071 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1072 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1073 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1075 struct btrfs_qgroup_limit_item
{
1077 * only updated when any of the other values change
1084 } __attribute__ ((__packed__
));
1086 struct btrfs_space_info
{
1089 u64 total_bytes
; /* total bytes in the space,
1090 this doesn't take mirrors into account */
1091 u64 bytes_used
; /* total bytes used,
1092 this doesn't take mirrors into account */
1093 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1094 transaction finishes */
1095 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1096 current allocations */
1097 u64 bytes_readonly
; /* total bytes that are read only */
1099 u64 bytes_may_use
; /* number of bytes that may be used for
1100 delalloc/allocations */
1101 u64 disk_used
; /* total bytes used on disk */
1102 u64 disk_total
; /* total bytes on disk, takes mirrors into
1106 * we bump reservation progress every time we decrement
1107 * bytes_reserved. This way people waiting for reservations
1108 * know something good has happened and they can check
1109 * for progress. The number here isn't to be trusted, it
1110 * just shows reclaim activity
1112 unsigned long reservation_progress
;
1114 unsigned int full
:1; /* indicates that we cannot allocate any more
1115 chunks for this space */
1116 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1118 unsigned int flush
:1; /* set if we are trying to make space */
1120 unsigned int force_alloc
; /* set if we need to force a chunk
1121 alloc for this space */
1123 struct list_head list
;
1125 /* for block groups in our same type */
1126 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1128 struct rw_semaphore groups_sem
;
1129 wait_queue_head_t wait
;
1132 #define BTRFS_BLOCK_RSV_GLOBAL 1
1133 #define BTRFS_BLOCK_RSV_DELALLOC 2
1134 #define BTRFS_BLOCK_RSV_TRANS 3
1135 #define BTRFS_BLOCK_RSV_CHUNK 4
1136 #define BTRFS_BLOCK_RSV_DELOPS 5
1137 #define BTRFS_BLOCK_RSV_EMPTY 6
1138 #define BTRFS_BLOCK_RSV_TEMP 7
1140 struct btrfs_block_rsv
{
1143 struct btrfs_space_info
*space_info
;
1145 unsigned short full
;
1146 unsigned short type
;
1147 unsigned short failfast
;
1151 * free clusters are used to claim free space in relatively large chunks,
1152 * allowing us to do less seeky writes. They are used for all metadata
1153 * allocations and data allocations in ssd mode.
1155 struct btrfs_free_cluster
{
1157 spinlock_t refill_lock
;
1158 struct rb_root root
;
1160 /* largest extent in this cluster */
1163 /* first extent starting offset */
1166 struct btrfs_block_group_cache
*block_group
;
1168 * when a cluster is allocated from a block group, we put the
1169 * cluster onto a list in the block group so that it can
1170 * be freed before the block group is freed.
1172 struct list_head block_group_list
;
1175 enum btrfs_caching_type
{
1177 BTRFS_CACHE_STARTED
= 1,
1178 BTRFS_CACHE_FAST
= 2,
1179 BTRFS_CACHE_FINISHED
= 3,
1182 enum btrfs_disk_cache_state
{
1183 BTRFS_DC_WRITTEN
= 0,
1187 BTRFS_DC_NEED_WRITE
= 4,
1190 struct btrfs_caching_control
{
1191 struct list_head list
;
1193 wait_queue_head_t wait
;
1194 struct btrfs_work work
;
1195 struct btrfs_block_group_cache
*block_group
;
1200 struct btrfs_block_group_cache
{
1201 struct btrfs_key key
;
1202 struct btrfs_block_group_item item
;
1203 struct btrfs_fs_info
*fs_info
;
1204 struct inode
*inode
;
1211 u64 cache_generation
;
1213 /* for raid56, this is a full stripe, without parity */
1214 unsigned long full_stripe_len
;
1217 unsigned int dirty
:1;
1218 unsigned int iref
:1;
1220 int disk_cache_state
;
1222 /* cache tracking stuff */
1224 struct btrfs_caching_control
*caching_ctl
;
1225 u64 last_byte_to_unpin
;
1227 struct btrfs_space_info
*space_info
;
1229 /* free space cache stuff */
1230 struct btrfs_free_space_ctl
*free_space_ctl
;
1232 /* block group cache stuff */
1233 struct rb_node cache_node
;
1235 /* for block groups in the same raid type */
1236 struct list_head list
;
1241 /* List of struct btrfs_free_clusters for this block group.
1242 * Today it will only have one thing on it, but that may change
1244 struct list_head cluster_list
;
1246 /* For delayed block group creation */
1247 struct list_head new_bg_list
;
1250 /* delayed seq elem */
1252 struct list_head list
;
1256 enum btrfs_orphan_cleanup_state
{
1257 ORPHAN_CLEANUP_STARTED
= 1,
1258 ORPHAN_CLEANUP_DONE
= 2,
1261 /* used by the raid56 code to lock stripes for read/modify/write */
1262 struct btrfs_stripe_hash
{
1263 struct list_head hash_list
;
1264 wait_queue_head_t wait
;
1268 /* used by the raid56 code to lock stripes for read/modify/write */
1269 struct btrfs_stripe_hash_table
{
1270 struct list_head stripe_cache
;
1271 spinlock_t cache_lock
;
1273 struct btrfs_stripe_hash table
[];
1276 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1279 struct reloc_control
;
1280 struct btrfs_device
;
1281 struct btrfs_fs_devices
;
1282 struct btrfs_balance_control
;
1283 struct btrfs_delayed_root
;
1284 struct btrfs_fs_info
{
1285 u8 fsid
[BTRFS_FSID_SIZE
];
1286 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1287 struct btrfs_root
*extent_root
;
1288 struct btrfs_root
*tree_root
;
1289 struct btrfs_root
*chunk_root
;
1290 struct btrfs_root
*dev_root
;
1291 struct btrfs_root
*fs_root
;
1292 struct btrfs_root
*csum_root
;
1293 struct btrfs_root
*quota_root
;
1295 /* the log root tree is a directory of all the other log roots */
1296 struct btrfs_root
*log_root_tree
;
1298 spinlock_t fs_roots_radix_lock
;
1299 struct radix_tree_root fs_roots_radix
;
1301 /* block group cache stuff */
1302 spinlock_t block_group_cache_lock
;
1303 u64 first_logical_byte
;
1304 struct rb_root block_group_cache_tree
;
1306 /* keep track of unallocated space */
1307 spinlock_t free_chunk_lock
;
1308 u64 free_chunk_space
;
1310 struct extent_io_tree freed_extents
[2];
1311 struct extent_io_tree
*pinned_extents
;
1313 /* logical->physical extent mapping */
1314 struct btrfs_mapping_tree mapping_tree
;
1317 * block reservation for extent, checksum, root tree and
1318 * delayed dir index item
1320 struct btrfs_block_rsv global_block_rsv
;
1321 /* block reservation for delay allocation */
1322 struct btrfs_block_rsv delalloc_block_rsv
;
1323 /* block reservation for metadata operations */
1324 struct btrfs_block_rsv trans_block_rsv
;
1325 /* block reservation for chunk tree */
1326 struct btrfs_block_rsv chunk_block_rsv
;
1327 /* block reservation for delayed operations */
1328 struct btrfs_block_rsv delayed_block_rsv
;
1330 struct btrfs_block_rsv empty_block_rsv
;
1333 u64 last_trans_committed
;
1336 * this is updated to the current trans every time a full commit
1337 * is required instead of the faster short fsync log commits
1339 u64 last_trans_log_full_commit
;
1340 unsigned long mount_opt
;
1341 unsigned long compress_type
:4;
1343 * It is a suggestive number, the read side is safe even it gets a
1344 * wrong number because we will write out the data into a regular
1345 * extent. The write side(mount/remount) is under ->s_umount lock,
1346 * so it is also safe.
1350 * Protected by ->chunk_mutex and sb->s_umount.
1352 * The reason that we use two lock to protect it is because only
1353 * remount and mount operations can change it and these two operations
1354 * are under sb->s_umount, but the read side (chunk allocation) can not
1355 * acquire sb->s_umount or the deadlock would happen. So we use two
1356 * locks to protect it. On the write side, we must acquire two locks,
1357 * and on the read side, we just need acquire one of them.
1360 struct btrfs_transaction
*running_transaction
;
1361 wait_queue_head_t transaction_throttle
;
1362 wait_queue_head_t transaction_wait
;
1363 wait_queue_head_t transaction_blocked_wait
;
1364 wait_queue_head_t async_submit_wait
;
1366 struct btrfs_super_block
*super_copy
;
1367 struct btrfs_super_block
*super_for_commit
;
1368 struct block_device
*__bdev
;
1369 struct super_block
*sb
;
1370 struct inode
*btree_inode
;
1371 struct backing_dev_info bdi
;
1372 struct mutex tree_log_mutex
;
1373 struct mutex transaction_kthread_mutex
;
1374 struct mutex cleaner_mutex
;
1375 struct mutex chunk_mutex
;
1376 struct mutex volume_mutex
;
1378 /* this is used during read/modify/write to make sure
1379 * no two ios are trying to mod the same stripe at the same
1382 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1385 * this protects the ordered operations list only while we are
1386 * processing all of the entries on it. This way we make
1387 * sure the commit code doesn't find the list temporarily empty
1388 * because another function happens to be doing non-waiting preflush
1389 * before jumping into the main commit.
1391 struct mutex ordered_operations_mutex
;
1392 struct rw_semaphore extent_commit_sem
;
1394 struct rw_semaphore cleanup_work_sem
;
1396 struct rw_semaphore subvol_sem
;
1397 struct srcu_struct subvol_srcu
;
1399 spinlock_t trans_lock
;
1401 * the reloc mutex goes with the trans lock, it is taken
1402 * during commit to protect us from the relocation code
1404 struct mutex reloc_mutex
;
1406 struct list_head trans_list
;
1407 struct list_head dead_roots
;
1408 struct list_head caching_block_groups
;
1410 spinlock_t delayed_iput_lock
;
1411 struct list_head delayed_iputs
;
1413 /* this protects tree_mod_seq_list */
1414 spinlock_t tree_mod_seq_lock
;
1415 atomic_t tree_mod_seq
;
1416 struct list_head tree_mod_seq_list
;
1417 struct seq_list tree_mod_seq_elem
;
1419 /* this protects tree_mod_log */
1420 rwlock_t tree_mod_log_lock
;
1421 struct rb_root tree_mod_log
;
1423 atomic_t nr_async_submits
;
1424 atomic_t async_submit_draining
;
1425 atomic_t nr_async_bios
;
1426 atomic_t async_delalloc_pages
;
1427 atomic_t open_ioctl_trans
;
1430 * this is used by the balancing code to wait for all the pending
1433 spinlock_t ordered_extent_lock
;
1436 * all of the data=ordered extents pending writeback
1437 * these can span multiple transactions and basically include
1438 * every dirty data page that isn't from nodatacow
1440 struct list_head ordered_extents
;
1442 spinlock_t delalloc_lock
;
1444 * all of the inodes that have delalloc bytes. It is possible for
1445 * this list to be empty even when there is still dirty data=ordered
1446 * extents waiting to finish IO.
1448 struct list_head delalloc_inodes
;
1451 * there is a pool of worker threads for checksumming during writes
1452 * and a pool for checksumming after reads. This is because readers
1453 * can run with FS locks held, and the writers may be waiting for
1454 * those locks. We don't want ordering in the pending list to cause
1455 * deadlocks, and so the two are serviced separately.
1457 * A third pool does submit_bio to avoid deadlocking with the other
1460 struct btrfs_workers generic_worker
;
1461 struct btrfs_workers workers
;
1462 struct btrfs_workers delalloc_workers
;
1463 struct btrfs_workers flush_workers
;
1464 struct btrfs_workers endio_workers
;
1465 struct btrfs_workers endio_meta_workers
;
1466 struct btrfs_workers endio_raid56_workers
;
1467 struct btrfs_workers rmw_workers
;
1468 struct btrfs_workers endio_meta_write_workers
;
1469 struct btrfs_workers endio_write_workers
;
1470 struct btrfs_workers endio_freespace_worker
;
1471 struct btrfs_workers submit_workers
;
1472 struct btrfs_workers caching_workers
;
1473 struct btrfs_workers readahead_workers
;
1476 * fixup workers take dirty pages that didn't properly go through
1477 * the cow mechanism and make them safe to write. It happens
1478 * for the sys_munmap function call path
1480 struct btrfs_workers fixup_workers
;
1481 struct btrfs_workers delayed_workers
;
1482 struct task_struct
*transaction_kthread
;
1483 struct task_struct
*cleaner_kthread
;
1484 int thread_pool_size
;
1486 struct kobject super_kobj
;
1487 struct completion kobj_unregister
;
1490 int log_root_recovering
;
1496 /* used to keep from writing metadata until there is a nice batch */
1497 struct percpu_counter dirty_metadata_bytes
;
1498 struct percpu_counter delalloc_bytes
;
1499 s32 dirty_metadata_batch
;
1502 struct list_head dirty_cowonly_roots
;
1504 struct btrfs_fs_devices
*fs_devices
;
1507 * the space_info list is almost entirely read only. It only changes
1508 * when we add a new raid type to the FS, and that happens
1509 * very rarely. RCU is used to protect it.
1511 struct list_head space_info
;
1513 struct btrfs_space_info
*data_sinfo
;
1515 struct reloc_control
*reloc_ctl
;
1517 /* data_alloc_cluster is only used in ssd mode */
1518 struct btrfs_free_cluster data_alloc_cluster
;
1520 /* all metadata allocations go through this cluster */
1521 struct btrfs_free_cluster meta_alloc_cluster
;
1523 /* auto defrag inodes go here */
1524 spinlock_t defrag_inodes_lock
;
1525 struct rb_root defrag_inodes
;
1526 atomic_t defrag_running
;
1528 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1529 seqlock_t profiles_lock
;
1531 * these three are in extended format (availability of single
1532 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1533 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1535 u64 avail_data_alloc_bits
;
1536 u64 avail_metadata_alloc_bits
;
1537 u64 avail_system_alloc_bits
;
1539 /* restriper state */
1540 spinlock_t balance_lock
;
1541 struct mutex balance_mutex
;
1542 atomic_t balance_running
;
1543 atomic_t balance_pause_req
;
1544 atomic_t balance_cancel_req
;
1545 struct btrfs_balance_control
*balance_ctl
;
1546 wait_queue_head_t balance_wait_q
;
1548 unsigned data_chunk_allocations
;
1549 unsigned metadata_ratio
;
1553 /* private scrub information */
1554 struct mutex scrub_lock
;
1555 atomic_t scrubs_running
;
1556 atomic_t scrub_pause_req
;
1557 atomic_t scrubs_paused
;
1558 atomic_t scrub_cancel_req
;
1559 wait_queue_head_t scrub_pause_wait
;
1560 struct rw_semaphore scrub_super_lock
;
1561 int scrub_workers_refcnt
;
1562 struct btrfs_workers scrub_workers
;
1563 struct btrfs_workers scrub_wr_completion_workers
;
1564 struct btrfs_workers scrub_nocow_workers
;
1566 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1567 u32 check_integrity_print_mask
;
1572 unsigned int quota_enabled
:1;
1575 * quota_enabled only changes state after a commit. This holds the
1578 unsigned int pending_quota_state
:1;
1580 /* is qgroup tracking in a consistent state? */
1583 /* holds configuration and tracking. Protected by qgroup_lock */
1584 struct rb_root qgroup_tree
;
1585 spinlock_t qgroup_lock
;
1587 /* list of dirty qgroups to be written at next commit */
1588 struct list_head dirty_qgroups
;
1590 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1593 /* filesystem state */
1594 unsigned long fs_state
;
1596 struct btrfs_delayed_root
*delayed_root
;
1598 /* readahead tree */
1599 spinlock_t reada_lock
;
1600 struct radix_tree_root reada_tree
;
1602 /* next backup root to be overwritten */
1603 int backup_root_index
;
1605 int num_tolerated_disk_barrier_failures
;
1607 /* device replace state */
1608 struct btrfs_dev_replace dev_replace
;
1610 atomic_t mutually_exclusive_operation_running
;
1614 * in ram representation of the tree. extent_root is used for all allocations
1615 * and for the extent tree extent_root root.
1618 struct extent_buffer
*node
;
1620 struct extent_buffer
*commit_root
;
1621 struct btrfs_root
*log_root
;
1622 struct btrfs_root
*reloc_root
;
1624 struct btrfs_root_item root_item
;
1625 struct btrfs_key root_key
;
1626 struct btrfs_fs_info
*fs_info
;
1627 struct extent_io_tree dirty_log_pages
;
1629 struct kobject root_kobj
;
1630 struct completion kobj_unregister
;
1631 struct mutex objectid_mutex
;
1633 spinlock_t accounting_lock
;
1634 struct btrfs_block_rsv
*block_rsv
;
1636 /* free ino cache stuff */
1637 struct mutex fs_commit_mutex
;
1638 struct btrfs_free_space_ctl
*free_ino_ctl
;
1639 enum btrfs_caching_type cached
;
1640 spinlock_t cache_lock
;
1641 wait_queue_head_t cache_wait
;
1642 struct btrfs_free_space_ctl
*free_ino_pinned
;
1644 struct inode
*cache_inode
;
1646 struct mutex log_mutex
;
1647 wait_queue_head_t log_writer_wait
;
1648 wait_queue_head_t log_commit_wait
[2];
1649 atomic_t log_writers
;
1650 atomic_t log_commit
[2];
1652 unsigned long log_transid
;
1653 unsigned long last_log_commit
;
1654 pid_t log_start_pid
;
1655 bool log_multiple_pids
;
1660 /* data allocations are done in sectorsize units */
1663 /* node allocations are done in nodesize units */
1666 /* leaf allocations are done in leafsize units */
1673 u64 highest_objectid
;
1675 /* btrfs_record_root_in_trans is a multi-step process,
1676 * and it can race with the balancing code. But the
1677 * race is very small, and only the first time the root
1678 * is added to each transaction. So in_trans_setup
1679 * is used to tell us when more checks are required
1681 unsigned long in_trans_setup
;
1686 u64 defrag_trans_start
;
1687 struct btrfs_key defrag_progress
;
1688 struct btrfs_key defrag_max
;
1692 /* the dirty list is only used by non-reference counted roots */
1693 struct list_head dirty_list
;
1695 struct list_head root_list
;
1697 spinlock_t log_extents_lock
[2];
1698 struct list_head logged_list
[2];
1700 spinlock_t orphan_lock
;
1701 atomic_t orphan_inodes
;
1702 struct btrfs_block_rsv
*orphan_block_rsv
;
1703 int orphan_item_inserted
;
1704 int orphan_cleanup_state
;
1706 spinlock_t inode_lock
;
1707 /* red-black tree that keeps track of in-memory inodes */
1708 struct rb_root inode_tree
;
1711 * radix tree that keeps track of delayed nodes of every inode,
1712 * protected by inode_lock
1714 struct radix_tree_root delayed_nodes_tree
;
1716 * right now this just gets used so that a root has its own devid
1717 * for stat. It may be used for more later
1723 spinlock_t root_item_lock
;
1726 struct btrfs_ioctl_defrag_range_args
{
1727 /* start of the defrag operation */
1730 /* number of bytes to defrag, use (u64)-1 to say all */
1734 * flags for the operation, which can include turning
1735 * on compression for this one defrag
1740 * any extent bigger than this will be considered
1741 * already defragged. Use 0 to take the kernel default
1742 * Use 1 to say every single extent must be rewritten
1744 __u32 extent_thresh
;
1747 * which compression method to use if turning on compression
1748 * for this defrag operation. If unspecified, zlib will
1751 __u32 compress_type
;
1753 /* spare for later */
1759 * inode items have the data typically returned from stat and store other
1760 * info about object characteristics. There is one for every file and dir in
1763 #define BTRFS_INODE_ITEM_KEY 1
1764 #define BTRFS_INODE_REF_KEY 12
1765 #define BTRFS_INODE_EXTREF_KEY 13
1766 #define BTRFS_XATTR_ITEM_KEY 24
1767 #define BTRFS_ORPHAN_ITEM_KEY 48
1768 /* reserve 2-15 close to the inode for later flexibility */
1771 * dir items are the name -> inode pointers in a directory. There is one
1772 * for every name in a directory.
1774 #define BTRFS_DIR_LOG_ITEM_KEY 60
1775 #define BTRFS_DIR_LOG_INDEX_KEY 72
1776 #define BTRFS_DIR_ITEM_KEY 84
1777 #define BTRFS_DIR_INDEX_KEY 96
1779 * extent data is for file data
1781 #define BTRFS_EXTENT_DATA_KEY 108
1784 * extent csums are stored in a separate tree and hold csums for
1785 * an entire extent on disk.
1787 #define BTRFS_EXTENT_CSUM_KEY 128
1790 * root items point to tree roots. They are typically in the root
1791 * tree used by the super block to find all the other trees
1793 #define BTRFS_ROOT_ITEM_KEY 132
1796 * root backrefs tie subvols and snapshots to the directory entries that
1799 #define BTRFS_ROOT_BACKREF_KEY 144
1802 * root refs make a fast index for listing all of the snapshots and
1803 * subvolumes referenced by a given root. They point directly to the
1804 * directory item in the root that references the subvol
1806 #define BTRFS_ROOT_REF_KEY 156
1809 * extent items are in the extent map tree. These record which blocks
1810 * are used, and how many references there are to each block
1812 #define BTRFS_EXTENT_ITEM_KEY 168
1815 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1816 * the length, so we save the level in key->offset instead of the length.
1818 #define BTRFS_METADATA_ITEM_KEY 169
1820 #define BTRFS_TREE_BLOCK_REF_KEY 176
1822 #define BTRFS_EXTENT_DATA_REF_KEY 178
1824 #define BTRFS_EXTENT_REF_V0_KEY 180
1826 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1828 #define BTRFS_SHARED_DATA_REF_KEY 184
1831 * block groups give us hints into the extent allocation trees. Which
1832 * blocks are free etc etc
1834 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1836 #define BTRFS_DEV_EXTENT_KEY 204
1837 #define BTRFS_DEV_ITEM_KEY 216
1838 #define BTRFS_CHUNK_ITEM_KEY 228
1841 * Records the overall state of the qgroups.
1842 * There's only one instance of this key present,
1843 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1845 #define BTRFS_QGROUP_STATUS_KEY 240
1847 * Records the currently used space of the qgroup.
1848 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1850 #define BTRFS_QGROUP_INFO_KEY 242
1852 * Contains the user configured limits for the qgroup.
1853 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1855 #define BTRFS_QGROUP_LIMIT_KEY 244
1857 * Records the child-parent relationship of qgroups. For
1858 * each relation, 2 keys are present:
1859 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1860 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1862 #define BTRFS_QGROUP_RELATION_KEY 246
1864 #define BTRFS_BALANCE_ITEM_KEY 248
1867 * Persistantly stores the io stats in the device tree.
1868 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1870 #define BTRFS_DEV_STATS_KEY 249
1873 * Persistantly stores the device replace state in the device tree.
1874 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1876 #define BTRFS_DEV_REPLACE_KEY 250
1879 * string items are for debugging. They just store a short string of
1882 #define BTRFS_STRING_ITEM_KEY 253
1885 * Flags for mount options.
1887 * Note: don't forget to add new options to btrfs_show_options()
1889 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1890 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1891 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1892 #define BTRFS_MOUNT_SSD (1 << 3)
1893 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1894 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1895 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1896 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1897 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1898 #define BTRFS_MOUNT_NOSSD (1 << 9)
1899 #define BTRFS_MOUNT_DISCARD (1 << 10)
1900 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1901 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1902 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1903 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1904 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1905 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1906 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1907 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1908 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1909 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1910 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1911 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1913 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1914 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1915 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1916 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1921 #define BTRFS_INODE_NODATASUM (1 << 0)
1922 #define BTRFS_INODE_NODATACOW (1 << 1)
1923 #define BTRFS_INODE_READONLY (1 << 2)
1924 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1925 #define BTRFS_INODE_PREALLOC (1 << 4)
1926 #define BTRFS_INODE_SYNC (1 << 5)
1927 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1928 #define BTRFS_INODE_APPEND (1 << 7)
1929 #define BTRFS_INODE_NODUMP (1 << 8)
1930 #define BTRFS_INODE_NOATIME (1 << 9)
1931 #define BTRFS_INODE_DIRSYNC (1 << 10)
1932 #define BTRFS_INODE_COMPRESS (1 << 11)
1934 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1936 struct btrfs_map_token
{
1937 struct extent_buffer
*eb
;
1939 unsigned long offset
;
1942 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1944 token
->kaddr
= NULL
;
1947 /* some macros to generate set/get funcs for the struct fields. This
1948 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1951 #define le8_to_cpu(v) (v)
1952 #define cpu_to_le8(v) (v)
1955 #define read_eb_member(eb, ptr, type, member, result) ( \
1956 read_extent_buffer(eb, (char *)(result), \
1957 ((unsigned long)(ptr)) + \
1958 offsetof(type, member), \
1959 sizeof(((type *)0)->member)))
1961 #define write_eb_member(eb, ptr, type, member, result) ( \
1962 write_extent_buffer(eb, (char *)(result), \
1963 ((unsigned long)(ptr)) + \
1964 offsetof(type, member), \
1965 sizeof(((type *)0)->member)))
1967 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1968 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1969 unsigned long off, \
1970 struct btrfs_map_token *token); \
1971 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1972 unsigned long off, u##bits val, \
1973 struct btrfs_map_token *token); \
1974 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1975 unsigned long off) \
1977 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1979 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1980 unsigned long off, u##bits val) \
1982 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1985 DECLARE_BTRFS_SETGET_BITS(8)
1986 DECLARE_BTRFS_SETGET_BITS(16)
1987 DECLARE_BTRFS_SETGET_BITS(32)
1988 DECLARE_BTRFS_SETGET_BITS(64)
1990 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1991 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1993 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1994 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1996 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1999 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2000 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2002 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2003 struct btrfs_map_token *token) \
2005 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2006 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2008 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2009 type *s, u##bits val, \
2010 struct btrfs_map_token *token) \
2012 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2013 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2016 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2017 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2019 type *p = page_address(eb->pages[0]); \
2020 u##bits res = le##bits##_to_cpu(p->member); \
2023 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2026 type *p = page_address(eb->pages[0]); \
2027 p->member = cpu_to_le##bits(val); \
2030 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2031 static inline u##bits btrfs_##name(type *s) \
2033 return le##bits##_to_cpu(s->member); \
2035 static inline void btrfs_set_##name(type *s, u##bits val) \
2037 s->member = cpu_to_le##bits(val); \
2040 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2041 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2042 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2043 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2044 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2045 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2047 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2048 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2049 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2050 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2051 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2052 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2054 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2055 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2057 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2059 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2061 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2063 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2065 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2066 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2068 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2070 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2072 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2075 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
2077 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2080 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
2082 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2085 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2086 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2087 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2088 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2089 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2090 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2091 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2092 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2093 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2094 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2095 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2097 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2099 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2102 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2103 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2104 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2106 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2108 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2110 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2112 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2113 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2115 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2117 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2118 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2120 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2123 unsigned long offset
= (unsigned long)c
;
2124 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2125 offset
+= nr
* sizeof(struct btrfs_stripe
);
2126 return (struct btrfs_stripe
*)offset
;
2129 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2131 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2134 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2135 struct btrfs_chunk
*c
, int nr
)
2137 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2140 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2141 struct btrfs_chunk
*c
, int nr
)
2143 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2146 /* struct btrfs_block_group_item */
2147 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2149 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2151 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2152 struct btrfs_block_group_item
, chunk_objectid
, 64);
2154 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2155 struct btrfs_block_group_item
, chunk_objectid
, 64);
2156 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2157 struct btrfs_block_group_item
, flags
, 64);
2158 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2159 struct btrfs_block_group_item
, flags
, 64);
2161 /* struct btrfs_inode_ref */
2162 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2163 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2165 /* struct btrfs_inode_extref */
2166 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2167 parent_objectid
, 64);
2168 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2170 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2172 /* struct btrfs_inode_item */
2173 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2174 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2175 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2176 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2177 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2178 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2179 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2180 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2181 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2182 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2183 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2184 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2186 static inline struct btrfs_timespec
*
2187 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2189 unsigned long ptr
= (unsigned long)inode_item
;
2190 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2191 return (struct btrfs_timespec
*)ptr
;
2194 static inline struct btrfs_timespec
*
2195 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2197 unsigned long ptr
= (unsigned long)inode_item
;
2198 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2199 return (struct btrfs_timespec
*)ptr
;
2202 static inline struct btrfs_timespec
*
2203 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2205 unsigned long ptr
= (unsigned long)inode_item
;
2206 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2207 return (struct btrfs_timespec
*)ptr
;
2210 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2211 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2213 /* struct btrfs_dev_extent */
2214 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2216 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2217 chunk_objectid
, 64);
2218 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2220 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2222 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2224 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2225 return (u8
*)((unsigned long)dev
+ ptr
);
2228 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2229 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2231 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2233 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2236 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2238 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2239 struct btrfs_tree_block_info
*item
,
2240 struct btrfs_disk_key
*key
)
2242 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2245 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2246 struct btrfs_tree_block_info
*item
,
2247 struct btrfs_disk_key
*key
)
2249 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2252 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2254 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2256 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2258 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2261 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2264 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2266 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2269 static inline u32
btrfs_extent_inline_ref_size(int type
)
2271 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2272 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2273 return sizeof(struct btrfs_extent_inline_ref
);
2274 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2275 return sizeof(struct btrfs_shared_data_ref
) +
2276 sizeof(struct btrfs_extent_inline_ref
);
2277 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2278 return sizeof(struct btrfs_extent_data_ref
) +
2279 offsetof(struct btrfs_extent_inline_ref
, offset
);
2284 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2285 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2287 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2288 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2290 /* struct btrfs_node */
2291 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2292 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2294 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2297 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2298 sizeof(struct btrfs_key_ptr
) * nr
;
2299 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2302 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2306 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2307 sizeof(struct btrfs_key_ptr
) * nr
;
2308 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2311 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2314 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2315 sizeof(struct btrfs_key_ptr
) * nr
;
2316 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2319 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2323 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2324 sizeof(struct btrfs_key_ptr
) * nr
;
2325 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2328 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2330 return offsetof(struct btrfs_node
, ptrs
) +
2331 sizeof(struct btrfs_key_ptr
) * nr
;
2334 void btrfs_node_key(struct extent_buffer
*eb
,
2335 struct btrfs_disk_key
*disk_key
, int nr
);
2337 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2338 struct btrfs_disk_key
*disk_key
, int nr
)
2341 ptr
= btrfs_node_key_ptr_offset(nr
);
2342 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2343 struct btrfs_key_ptr
, key
, disk_key
);
2346 /* struct btrfs_item */
2347 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2348 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2350 static inline unsigned long btrfs_item_nr_offset(int nr
)
2352 return offsetof(struct btrfs_leaf
, items
) +
2353 sizeof(struct btrfs_item
) * nr
;
2356 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
2359 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2362 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2363 struct btrfs_item
*item
)
2365 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2368 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2370 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
2373 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2375 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
2378 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2380 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
2383 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2384 struct btrfs_disk_key
*disk_key
, int nr
)
2386 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2387 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2390 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2391 struct btrfs_disk_key
*disk_key
, int nr
)
2393 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2394 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2397 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2400 * struct btrfs_root_ref
2402 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2403 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2404 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2406 /* struct btrfs_dir_item */
2407 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2408 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2409 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2410 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2412 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2413 struct btrfs_dir_item
*item
,
2414 struct btrfs_disk_key
*key
)
2416 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2419 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2420 struct btrfs_dir_item
*item
,
2421 struct btrfs_disk_key
*key
)
2423 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2426 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2428 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2430 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2433 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2434 struct btrfs_free_space_header
*h
,
2435 struct btrfs_disk_key
*key
)
2437 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2440 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2441 struct btrfs_free_space_header
*h
,
2442 struct btrfs_disk_key
*key
)
2444 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2447 /* struct btrfs_disk_key */
2448 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2450 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2451 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2453 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2454 struct btrfs_disk_key
*disk
)
2456 cpu
->offset
= le64_to_cpu(disk
->offset
);
2457 cpu
->type
= disk
->type
;
2458 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2461 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2462 struct btrfs_key
*cpu
)
2464 disk
->offset
= cpu_to_le64(cpu
->offset
);
2465 disk
->type
= cpu
->type
;
2466 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2469 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2470 struct btrfs_key
*key
, int nr
)
2472 struct btrfs_disk_key disk_key
;
2473 btrfs_node_key(eb
, &disk_key
, nr
);
2474 btrfs_disk_key_to_cpu(key
, &disk_key
);
2477 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2478 struct btrfs_key
*key
, int nr
)
2480 struct btrfs_disk_key disk_key
;
2481 btrfs_item_key(eb
, &disk_key
, nr
);
2482 btrfs_disk_key_to_cpu(key
, &disk_key
);
2485 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2486 struct btrfs_dir_item
*item
,
2487 struct btrfs_key
*key
)
2489 struct btrfs_disk_key disk_key
;
2490 btrfs_dir_item_key(eb
, item
, &disk_key
);
2491 btrfs_disk_key_to_cpu(key
, &disk_key
);
2495 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2500 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2505 /* struct btrfs_header */
2506 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2507 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2509 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2510 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2511 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2512 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2514 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2516 return (btrfs_header_flags(eb
) & flag
) == flag
;
2519 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2521 u64 flags
= btrfs_header_flags(eb
);
2522 btrfs_set_header_flags(eb
, flags
| flag
);
2523 return (flags
& flag
) == flag
;
2526 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2528 u64 flags
= btrfs_header_flags(eb
);
2529 btrfs_set_header_flags(eb
, flags
& ~flag
);
2530 return (flags
& flag
) == flag
;
2533 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2535 u64 flags
= btrfs_header_flags(eb
);
2536 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2539 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2542 u64 flags
= btrfs_header_flags(eb
);
2543 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2544 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2545 btrfs_set_header_flags(eb
, flags
);
2548 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2550 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2554 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2556 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2560 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2562 return btrfs_header_level(eb
) == 0;
2565 /* struct btrfs_root_item */
2566 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2568 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2569 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2570 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2572 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2574 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2575 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2576 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2577 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2578 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2579 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2580 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2581 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2583 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2585 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2587 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2589 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2591 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2594 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2596 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2599 /* struct btrfs_root_backup */
2600 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2602 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2604 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2605 tree_root_level
, 8);
2607 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2609 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2610 chunk_root_gen
, 64);
2611 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2612 chunk_root_level
, 8);
2614 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2616 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2617 extent_root_gen
, 64);
2618 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2619 extent_root_level
, 8);
2621 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2623 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2625 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2628 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2630 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2632 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2635 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2637 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2639 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2640 csum_root_level
, 8);
2641 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2643 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2645 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2648 /* struct btrfs_balance_item */
2649 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2651 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2652 struct btrfs_balance_item
*bi
,
2653 struct btrfs_disk_balance_args
*ba
)
2655 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2658 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2659 struct btrfs_balance_item
*bi
,
2660 struct btrfs_disk_balance_args
*ba
)
2662 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2665 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2666 struct btrfs_balance_item
*bi
,
2667 struct btrfs_disk_balance_args
*ba
)
2669 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2672 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2673 struct btrfs_balance_item
*bi
,
2674 struct btrfs_disk_balance_args
*ba
)
2676 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2679 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2680 struct btrfs_balance_item
*bi
,
2681 struct btrfs_disk_balance_args
*ba
)
2683 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2686 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2687 struct btrfs_balance_item
*bi
,
2688 struct btrfs_disk_balance_args
*ba
)
2690 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2694 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2695 struct btrfs_disk_balance_args
*disk
)
2697 memset(cpu
, 0, sizeof(*cpu
));
2699 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2700 cpu
->usage
= le64_to_cpu(disk
->usage
);
2701 cpu
->devid
= le64_to_cpu(disk
->devid
);
2702 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2703 cpu
->pend
= le64_to_cpu(disk
->pend
);
2704 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2705 cpu
->vend
= le64_to_cpu(disk
->vend
);
2706 cpu
->target
= le64_to_cpu(disk
->target
);
2707 cpu
->flags
= le64_to_cpu(disk
->flags
);
2711 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2712 struct btrfs_balance_args
*cpu
)
2714 memset(disk
, 0, sizeof(*disk
));
2716 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2717 disk
->usage
= cpu_to_le64(cpu
->usage
);
2718 disk
->devid
= cpu_to_le64(cpu
->devid
);
2719 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2720 disk
->pend
= cpu_to_le64(cpu
->pend
);
2721 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2722 disk
->vend
= cpu_to_le64(cpu
->vend
);
2723 disk
->target
= cpu_to_le64(cpu
->target
);
2724 disk
->flags
= cpu_to_le64(cpu
->flags
);
2727 /* struct btrfs_super_block */
2728 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2729 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2730 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2732 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2733 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2734 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2735 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2736 struct btrfs_super_block
, chunk_root_generation
, 64);
2737 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2739 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2741 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2742 chunk_root_level
, 8);
2743 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2745 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2746 log_root_transid
, 64);
2747 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2749 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2751 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2753 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2755 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2757 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2759 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2761 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2762 root_dir_objectid
, 64);
2763 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2765 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2767 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2768 compat_ro_flags
, 64);
2769 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2770 incompat_flags
, 64);
2771 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2773 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2774 cache_generation
, 64);
2776 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2778 int t
= btrfs_super_csum_type(s
);
2779 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2780 return btrfs_csum_sizes
[t
];
2783 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2785 return offsetof(struct btrfs_leaf
, items
);
2788 /* struct btrfs_file_extent_item */
2789 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2791 static inline unsigned long
2792 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2794 unsigned long offset
= (unsigned long)e
;
2795 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2799 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2801 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2804 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2806 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2808 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2809 disk_num_bytes
, 64);
2810 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2812 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2814 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2816 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2818 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2820 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2821 other_encoding
, 16);
2823 /* this returns the number of file bytes represented by the inline item.
2824 * If an item is compressed, this is the uncompressed size
2826 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2827 struct btrfs_file_extent_item
*e
)
2829 return btrfs_file_extent_ram_bytes(eb
, e
);
2833 * this returns the number of bytes used by the item on disk, minus the
2834 * size of any extent headers. If a file is compressed on disk, this is
2835 * the compressed size
2837 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2838 struct btrfs_item
*e
)
2840 unsigned long offset
;
2841 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2842 return btrfs_item_size(eb
, e
) - offset
;
2845 /* btrfs_dev_stats_item */
2846 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2847 struct btrfs_dev_stats_item
*ptr
,
2852 read_extent_buffer(eb
, &val
,
2853 offsetof(struct btrfs_dev_stats_item
, values
) +
2854 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2859 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2860 struct btrfs_dev_stats_item
*ptr
,
2863 write_extent_buffer(eb
, &val
,
2864 offsetof(struct btrfs_dev_stats_item
, values
) +
2865 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2869 /* btrfs_qgroup_status_item */
2870 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2872 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2874 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2876 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2879 /* btrfs_qgroup_info_item */
2880 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2882 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2883 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2885 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2886 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2889 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2890 struct btrfs_qgroup_info_item
, generation
, 64);
2891 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2893 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2894 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2895 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2897 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2898 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2900 /* btrfs_qgroup_limit_item */
2901 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2903 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2905 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2907 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2909 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2912 /* btrfs_dev_replace_item */
2913 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2914 struct btrfs_dev_replace_item
, src_devid
, 64);
2915 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2916 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2918 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2920 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2922 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2924 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2925 num_write_errors
, 64);
2926 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2927 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2929 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2931 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2934 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2935 struct btrfs_dev_replace_item
, src_devid
, 64);
2936 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2937 struct btrfs_dev_replace_item
,
2938 cont_reading_from_srcdev_mode
, 64);
2939 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2940 struct btrfs_dev_replace_item
, replace_state
, 64);
2941 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2942 struct btrfs_dev_replace_item
, time_started
, 64);
2943 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2944 struct btrfs_dev_replace_item
, time_stopped
, 64);
2945 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2946 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2947 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2948 struct btrfs_dev_replace_item
,
2949 num_uncorrectable_read_errors
, 64);
2950 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2951 struct btrfs_dev_replace_item
, cursor_left
, 64);
2952 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2953 struct btrfs_dev_replace_item
, cursor_right
, 64);
2955 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2957 return sb
->s_fs_info
;
2960 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2963 return root
->leafsize
;
2964 return root
->nodesize
;
2967 /* helper function to cast into the data area of the leaf. */
2968 #define btrfs_item_ptr(leaf, slot, type) \
2969 ((type *)(btrfs_leaf_data(leaf) + \
2970 btrfs_item_offset_nr(leaf, slot)))
2972 #define btrfs_item_ptr_offset(leaf, slot) \
2973 ((unsigned long)(btrfs_leaf_data(leaf) + \
2974 btrfs_item_offset_nr(leaf, slot)))
2976 static inline struct dentry
*fdentry(struct file
*file
)
2978 return file
->f_path
.dentry
;
2981 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2983 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2984 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2987 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2989 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2993 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2996 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3001 * Doing a truncate won't result in new nodes or leaves, just what we need for
3004 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3007 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3011 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3012 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3013 struct btrfs_root
*root
, unsigned long count
);
3014 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3015 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3016 struct btrfs_root
*root
, u64 bytenr
,
3017 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3018 int btrfs_pin_extent(struct btrfs_root
*root
,
3019 u64 bytenr
, u64 num
, int reserved
);
3020 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3021 u64 bytenr
, u64 num_bytes
);
3022 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3023 struct btrfs_root
*root
,
3024 u64 objectid
, u64 offset
, u64 bytenr
);
3025 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3026 struct btrfs_fs_info
*info
,
3028 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3029 u64
btrfs_find_block_group(struct btrfs_root
*root
,
3030 u64 search_start
, u64 search_hint
, int owner
);
3031 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
3032 struct btrfs_root
*root
, u32 blocksize
,
3033 u64 parent
, u64 root_objectid
,
3034 struct btrfs_disk_key
*key
, int level
,
3035 u64 hint
, u64 empty_size
);
3036 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3037 struct btrfs_root
*root
,
3038 struct extent_buffer
*buf
,
3039 u64 parent
, int last_ref
);
3040 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
3041 struct btrfs_root
*root
,
3042 u64 bytenr
, u32 blocksize
,
3044 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3045 struct btrfs_root
*root
,
3046 u64 root_objectid
, u64 owner
,
3047 u64 offset
, struct btrfs_key
*ins
);
3048 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3049 struct btrfs_root
*root
,
3050 u64 root_objectid
, u64 owner
, u64 offset
,
3051 struct btrfs_key
*ins
);
3052 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
3053 struct btrfs_root
*root
,
3054 u64 num_bytes
, u64 min_alloc_size
,
3055 u64 empty_size
, u64 hint_byte
,
3056 struct btrfs_key
*ins
, u64 data
);
3057 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3058 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3059 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3060 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3061 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3062 struct btrfs_root
*root
,
3063 u64 bytenr
, u64 num_bytes
, u64 flags
,
3065 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3066 struct btrfs_root
*root
,
3067 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3068 u64 owner
, u64 offset
, int for_cow
);
3070 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3071 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3072 u64 start
, u64 len
);
3073 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3074 struct btrfs_root
*root
);
3075 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3076 struct btrfs_root
*root
);
3077 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3078 struct btrfs_root
*root
,
3079 u64 bytenr
, u64 num_bytes
, u64 parent
,
3080 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3082 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3083 struct btrfs_root
*root
);
3084 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3085 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3086 int btrfs_read_block_groups(struct btrfs_root
*root
);
3087 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3088 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3089 struct btrfs_root
*root
, u64 bytes_used
,
3090 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3092 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3093 struct btrfs_root
*root
, u64 group_start
);
3094 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3095 struct btrfs_root
*root
);
3096 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
3097 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3098 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3100 enum btrfs_reserve_flush_enum
{
3101 /* If we are in the transaction, we can't flush anything.*/
3102 BTRFS_RESERVE_NO_FLUSH
,
3104 * Flushing delalloc may cause deadlock somewhere, in this
3105 * case, use FLUSH LIMIT
3107 BTRFS_RESERVE_FLUSH_LIMIT
,
3108 BTRFS_RESERVE_FLUSH_ALL
,
3111 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3112 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3113 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3114 struct btrfs_root
*root
);
3115 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3116 struct inode
*inode
);
3117 void btrfs_orphan_release_metadata(struct inode
*inode
);
3118 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3119 struct btrfs_block_rsv
*rsv
,
3121 u64
*qgroup_reserved
);
3122 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3123 struct btrfs_block_rsv
*rsv
,
3124 u64 qgroup_reserved
);
3125 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3126 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3127 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3128 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3129 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3130 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3131 unsigned short type
);
3132 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3133 struct btrfs_block_rsv
*rsv
);
3134 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3135 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3136 enum btrfs_reserve_flush_enum flush
);
3137 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3138 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3139 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3140 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3141 enum btrfs_reserve_flush_enum flush
);
3142 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3143 struct btrfs_block_rsv
*dst_rsv
,
3145 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3146 struct btrfs_block_rsv
*block_rsv
,
3148 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3149 struct btrfs_block_group_cache
*cache
);
3150 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3151 struct btrfs_block_group_cache
*cache
);
3152 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3153 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3154 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3155 u64 start
, u64 end
);
3156 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3157 u64 num_bytes
, u64
*actual_bytes
);
3158 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3159 struct btrfs_root
*root
, u64 type
);
3160 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3162 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3163 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3164 struct btrfs_fs_info
*fs_info
);
3165 int __get_raid_index(u64 flags
);
3167 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3168 int level
, int *slot
);
3169 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3170 int btrfs_previous_item(struct btrfs_root
*root
,
3171 struct btrfs_path
*path
, u64 min_objectid
,
3173 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
3174 struct btrfs_root
*root
, struct btrfs_path
*path
,
3175 struct btrfs_key
*new_key
);
3176 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3177 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3178 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3179 struct btrfs_key
*key
, int lowest_level
,
3181 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3182 struct btrfs_key
*max_key
,
3183 struct btrfs_path
*path
,
3185 enum btrfs_compare_tree_result
{
3186 BTRFS_COMPARE_TREE_NEW
,
3187 BTRFS_COMPARE_TREE_DELETED
,
3188 BTRFS_COMPARE_TREE_CHANGED
,
3190 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3191 struct btrfs_root
*right_root
,
3192 struct btrfs_path
*left_path
,
3193 struct btrfs_path
*right_path
,
3194 struct btrfs_key
*key
,
3195 enum btrfs_compare_tree_result result
,
3197 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3198 struct btrfs_root
*right_root
,
3199 btrfs_changed_cb_t cb
, void *ctx
);
3200 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3201 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3202 struct extent_buffer
*parent
, int parent_slot
,
3203 struct extent_buffer
**cow_ret
);
3204 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3205 struct btrfs_root
*root
,
3206 struct extent_buffer
*buf
,
3207 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3208 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3209 struct extent_buffer
*buf
);
3210 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
3211 struct btrfs_root
*root
, struct btrfs_path
*path
,
3213 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
3214 struct btrfs_root
*root
,
3215 struct btrfs_path
*path
,
3216 u32 new_size
, int from_end
);
3217 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3218 struct btrfs_root
*root
,
3219 struct btrfs_path
*path
,
3220 struct btrfs_key
*new_key
,
3221 unsigned long split_offset
);
3222 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3223 struct btrfs_root
*root
,
3224 struct btrfs_path
*path
,
3225 struct btrfs_key
*new_key
);
3226 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3227 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3229 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3230 struct btrfs_path
*p
, u64 time_seq
);
3231 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3232 struct btrfs_key
*key
, struct btrfs_path
*p
,
3233 int find_higher
, int return_any
);
3234 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3235 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3236 int start_slot
, u64
*last_ret
,
3237 struct btrfs_key
*progress
);
3238 void btrfs_release_path(struct btrfs_path
*p
);
3239 struct btrfs_path
*btrfs_alloc_path(void);
3240 void btrfs_free_path(struct btrfs_path
*p
);
3241 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3242 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3243 struct extent_buffer
*held
, int held_rw
);
3244 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3246 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3247 struct btrfs_path
*path
, int slot
, int nr
);
3248 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3249 struct btrfs_root
*root
,
3250 struct btrfs_path
*path
)
3252 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3255 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
3256 struct btrfs_root
*root
, struct btrfs_path
*path
,
3257 struct btrfs_key
*cpu_key
, u32
*data_size
,
3258 u32 total_data
, u32 total_size
, int nr
);
3259 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3260 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3261 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3262 struct btrfs_root
*root
,
3263 struct btrfs_path
*path
,
3264 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3266 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3267 struct btrfs_root
*root
,
3268 struct btrfs_path
*path
,
3269 struct btrfs_key
*key
,
3272 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3275 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3276 int btrfs_next_leaf_write(struct btrfs_trans_handle
*trans
,
3277 struct btrfs_root
*root
, struct btrfs_path
*path
,
3279 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3281 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3282 struct btrfs_path
*p
, u64 time_seq
)
3285 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3286 return btrfs_next_old_leaf(root
, p
, time_seq
);
3289 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3291 return btrfs_next_old_item(root
, p
, 0);
3293 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3294 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3295 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3296 struct btrfs_block_rsv
*block_rsv
,
3297 int update_ref
, int for_reloc
);
3298 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3299 struct btrfs_root
*root
,
3300 struct extent_buffer
*node
,
3301 struct extent_buffer
*parent
);
3302 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3305 * Get synced with close_ctree()
3308 return fs_info
->closing
;
3310 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3312 kfree(fs_info
->balance_ctl
);
3313 kfree(fs_info
->delayed_root
);
3314 kfree(fs_info
->extent_root
);
3315 kfree(fs_info
->tree_root
);
3316 kfree(fs_info
->chunk_root
);
3317 kfree(fs_info
->dev_root
);
3318 kfree(fs_info
->csum_root
);
3319 kfree(fs_info
->quota_root
);
3320 kfree(fs_info
->super_copy
);
3321 kfree(fs_info
->super_for_commit
);
3325 /* tree mod log functions from ctree.c */
3326 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3327 struct seq_list
*elem
);
3328 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3329 struct seq_list
*elem
);
3330 static inline u64
btrfs_inc_tree_mod_seq(struct btrfs_fs_info
*fs_info
)
3332 return atomic_inc_return(&fs_info
->tree_mod_seq
);
3334 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3337 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3338 struct btrfs_path
*path
,
3339 u64 root_id
, u64 ref_id
);
3340 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3341 struct btrfs_root
*tree_root
,
3342 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3343 const char *name
, int name_len
);
3344 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3345 struct btrfs_root
*tree_root
,
3346 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3347 const char *name
, int name_len
);
3348 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3349 struct btrfs_key
*key
);
3350 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3351 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3353 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3354 struct btrfs_root
*root
,
3355 struct btrfs_key
*key
,
3356 struct btrfs_root_item
*item
);
3357 void btrfs_read_root_item(struct btrfs_root
*root
,
3358 struct extent_buffer
*eb
, int slot
,
3359 struct btrfs_root_item
*item
);
3360 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
3361 btrfs_root_item
*item
, struct btrfs_key
*key
);
3362 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
3363 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3364 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3365 struct extent_buffer
*node
);
3366 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3367 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3368 struct btrfs_root
*root
);
3371 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3372 const char *name
, int name_len
);
3373 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3374 struct btrfs_root
*root
, const char *name
,
3375 int name_len
, struct inode
*dir
,
3376 struct btrfs_key
*location
, u8 type
, u64 index
);
3377 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3378 struct btrfs_root
*root
,
3379 struct btrfs_path
*path
, u64 dir
,
3380 const char *name
, int name_len
,
3382 struct btrfs_dir_item
*
3383 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3384 struct btrfs_root
*root
,
3385 struct btrfs_path
*path
, u64 dir
,
3386 u64 objectid
, const char *name
, int name_len
,
3388 struct btrfs_dir_item
*
3389 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3390 struct btrfs_path
*path
, u64 dirid
,
3391 const char *name
, int name_len
);
3392 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3393 struct btrfs_path
*path
,
3394 const char *name
, int name_len
);
3395 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3396 struct btrfs_root
*root
,
3397 struct btrfs_path
*path
,
3398 struct btrfs_dir_item
*di
);
3399 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3400 struct btrfs_root
*root
,
3401 struct btrfs_path
*path
, u64 objectid
,
3402 const char *name
, u16 name_len
,
3403 const void *data
, u16 data_len
);
3404 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3405 struct btrfs_root
*root
,
3406 struct btrfs_path
*path
, u64 dir
,
3407 const char *name
, u16 name_len
,
3409 int verify_dir_item(struct btrfs_root
*root
,
3410 struct extent_buffer
*leaf
,
3411 struct btrfs_dir_item
*dir_item
);
3414 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3415 struct btrfs_root
*root
, u64 offset
);
3416 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3417 struct btrfs_root
*root
, u64 offset
);
3418 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3421 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3422 struct btrfs_root
*root
,
3423 const char *name
, int name_len
,
3424 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3425 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3426 struct btrfs_root
*root
,
3427 const char *name
, int name_len
,
3428 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3429 int btrfs_get_inode_ref_index(struct btrfs_trans_handle
*trans
,
3430 struct btrfs_root
*root
,
3431 struct btrfs_path
*path
,
3432 const char *name
, int name_len
,
3433 u64 inode_objectid
, u64 ref_objectid
, int mod
,
3435 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3436 struct btrfs_root
*root
,
3437 struct btrfs_path
*path
, u64 objectid
);
3438 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3439 *root
, struct btrfs_path
*path
,
3440 struct btrfs_key
*location
, int mod
);
3442 struct btrfs_inode_extref
*
3443 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3444 struct btrfs_root
*root
,
3445 struct btrfs_path
*path
,
3446 const char *name
, int name_len
,
3447 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3450 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3451 u64 ref_objectid
, const char *name
,
3453 struct btrfs_inode_extref
**extref_ret
);
3456 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3457 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3458 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3459 struct bio
*bio
, u32
*dst
);
3460 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3461 struct bio
*bio
, u64 logical_offset
);
3462 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3463 struct btrfs_root
*root
,
3464 u64 objectid
, u64 pos
,
3465 u64 disk_offset
, u64 disk_num_bytes
,
3466 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3467 u8 compression
, u8 encryption
, u16 other_encoding
);
3468 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3469 struct btrfs_root
*root
,
3470 struct btrfs_path
*path
, u64 objectid
,
3471 u64 bytenr
, int mod
);
3472 u64
btrfs_file_extent_length(struct btrfs_path
*path
);
3473 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3474 struct btrfs_root
*root
,
3475 struct btrfs_ordered_sum
*sums
);
3476 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3477 struct bio
*bio
, u64 file_start
, int contig
);
3478 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
3479 struct btrfs_root
*root
,
3480 struct btrfs_path
*path
,
3481 u64 bytenr
, int cow
);
3482 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
3483 struct btrfs_root
*root
, struct btrfs_path
*path
,
3485 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3486 struct list_head
*list
, int search_commit
);
3488 struct btrfs_delalloc_work
{
3489 struct inode
*inode
;
3492 struct completion completion
;
3493 struct list_head list
;
3494 struct btrfs_work work
;
3497 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3498 int wait
, int delay_iput
);
3499 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3501 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3502 size_t pg_offset
, u64 start
, u64 len
,
3505 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3506 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3507 #define ClearPageChecked ClearPageFsMisc
3508 #define SetPageChecked SetPageFsMisc
3509 #define PageChecked PageFsMisc
3512 /* This forces readahead on a given range of bytes in an inode */
3513 static inline void btrfs_force_ra(struct address_space
*mapping
,
3514 struct file_ra_state
*ra
, struct file
*file
,
3515 pgoff_t offset
, unsigned long req_size
)
3517 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3520 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3521 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3522 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3523 struct btrfs_root
*root
,
3524 struct inode
*dir
, struct inode
*inode
,
3525 const char *name
, int name_len
);
3526 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3527 struct inode
*parent_inode
, struct inode
*inode
,
3528 const char *name
, int name_len
, int add_backref
, u64 index
);
3529 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3530 struct btrfs_root
*root
,
3531 struct inode
*dir
, u64 objectid
,
3532 const char *name
, int name_len
);
3533 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3535 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3536 struct btrfs_root
*root
,
3537 struct inode
*inode
, u64 new_size
,
3540 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3541 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3542 struct extent_state
**cached_state
);
3543 int btrfs_writepages(struct address_space
*mapping
,
3544 struct writeback_control
*wbc
);
3545 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3546 struct btrfs_root
*new_root
, u64 new_dirid
);
3547 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3548 size_t size
, struct bio
*bio
,
3549 unsigned long bio_flags
);
3550 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3551 int btrfs_readpage(struct file
*file
, struct page
*page
);
3552 void btrfs_evict_inode(struct inode
*inode
);
3553 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3554 int btrfs_dirty_inode(struct inode
*inode
);
3555 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3556 void btrfs_destroy_inode(struct inode
*inode
);
3557 int btrfs_drop_inode(struct inode
*inode
);
3558 int btrfs_init_cachep(void);
3559 void btrfs_destroy_cachep(void);
3560 long btrfs_ioctl_trans_end(struct file
*file
);
3561 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3562 struct btrfs_root
*root
, int *was_new
);
3563 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3564 size_t pg_offset
, u64 start
, u64 end
,
3566 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3567 struct btrfs_root
*root
,
3568 struct inode
*inode
);
3569 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3570 struct btrfs_root
*root
, struct inode
*inode
);
3571 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3572 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3573 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3574 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3575 struct btrfs_root
*root
);
3576 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3577 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3578 void btrfs_add_delayed_iput(struct inode
*inode
);
3579 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3580 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3581 u64 start
, u64 num_bytes
, u64 min_size
,
3582 loff_t actual_len
, u64
*alloc_hint
);
3583 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3584 struct btrfs_trans_handle
*trans
, int mode
,
3585 u64 start
, u64 num_bytes
, u64 min_size
,
3586 loff_t actual_len
, u64
*alloc_hint
);
3587 extern const struct dentry_operations btrfs_dentry_operations
;
3590 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3591 void btrfs_update_iflags(struct inode
*inode
);
3592 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3593 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3594 struct btrfs_ioctl_defrag_range_args
*range
,
3595 u64 newer_than
, unsigned long max_pages
);
3596 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3597 struct btrfs_ioctl_space_info
*space
);
3600 int btrfs_auto_defrag_init(void);
3601 void btrfs_auto_defrag_exit(void);
3602 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3603 struct inode
*inode
);
3604 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3605 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3606 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3607 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3609 int btrfs_replace_extent_cache(struct inode
*inode
, struct extent_map
*replace
,
3610 u64 start
, u64 end
, int skip_pinned
,
3612 extern const struct file_operations btrfs_file_operations
;
3613 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3614 struct btrfs_root
*root
, struct inode
*inode
,
3615 struct btrfs_path
*path
, u64 start
, u64 end
,
3616 u64
*drop_end
, int drop_cache
);
3617 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3618 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3619 u64 end
, int drop_cache
);
3620 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3621 struct inode
*inode
, u64 start
, u64 end
);
3622 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3623 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
3624 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3625 struct page
**pages
, size_t num_pages
,
3626 loff_t pos
, size_t write_bytes
,
3627 struct extent_state
**cached
);
3630 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3631 struct btrfs_root
*root
);
3634 int btrfs_init_sysfs(void);
3635 void btrfs_exit_sysfs(void);
3638 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3641 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3642 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3644 #ifdef CONFIG_PRINTK
3646 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3648 static inline __printf(2, 3)
3649 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3654 #define btrfs_emerg(fs_info, fmt, args...) \
3655 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3656 #define btrfs_alert(fs_info, fmt, args...) \
3657 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3658 #define btrfs_crit(fs_info, fmt, args...) \
3659 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3660 #define btrfs_err(fs_info, fmt, args...) \
3661 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3662 #define btrfs_warn(fs_info, fmt, args...) \
3663 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3664 #define btrfs_notice(fs_info, fmt, args...) \
3665 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3666 #define btrfs_info(fs_info, fmt, args...) \
3667 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3668 #define btrfs_debug(fs_info, fmt, args...) \
3669 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3672 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3673 unsigned int line
, int errno
, const char *fmt
, ...);
3676 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3677 struct btrfs_root
*root
, const char *function
,
3678 unsigned int line
, int errno
);
3680 #define btrfs_set_fs_incompat(__fs_info, opt) \
3681 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3683 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3686 struct btrfs_super_block
*disk_super
;
3689 disk_super
= fs_info
->super_copy
;
3690 features
= btrfs_super_incompat_flags(disk_super
);
3691 if (!(features
& flag
)) {
3693 btrfs_set_super_incompat_flags(disk_super
, features
);
3697 #define btrfs_fs_incompat(fs_info, opt) \
3698 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3700 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3702 struct btrfs_super_block
*disk_super
;
3703 disk_super
= fs_info
->super_copy
;
3704 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3708 * Call btrfs_abort_transaction as early as possible when an error condition is
3709 * detected, that way the exact line number is reported.
3712 #define btrfs_abort_transaction(trans, root, errno) \
3714 __btrfs_abort_transaction(trans, root, __func__, \
3718 #define btrfs_std_error(fs_info, errno) \
3721 __btrfs_std_error((fs_info), __func__, \
3722 __LINE__, (errno), NULL); \
3725 #define btrfs_error(fs_info, errno, fmt, args...) \
3727 __btrfs_std_error((fs_info), __func__, __LINE__, \
3728 (errno), fmt, ##args); \
3732 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3733 unsigned int line
, int errno
, const char *fmt
, ...);
3736 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3737 * will panic(). Otherwise we BUG() here.
3739 #define btrfs_panic(fs_info, errno, fmt, args...) \
3741 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3746 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3747 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3748 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3749 struct inode
*inode
, struct inode
*dir
);
3750 int btrfs_acl_chmod(struct inode
*inode
);
3752 #define btrfs_get_acl NULL
3753 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3754 struct inode
*inode
, struct inode
*dir
)
3758 static inline int btrfs_acl_chmod(struct inode
*inode
)
3765 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3766 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3767 struct btrfs_root
*root
);
3768 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3769 struct btrfs_root
*root
);
3770 int btrfs_recover_relocation(struct btrfs_root
*root
);
3771 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3772 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3773 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3774 struct extent_buffer
*cow
);
3775 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3776 struct btrfs_pending_snapshot
*pending
,
3777 u64
*bytes_to_reserve
);
3778 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3779 struct btrfs_pending_snapshot
*pending
);
3782 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3783 u64 end
, struct btrfs_scrub_progress
*progress
,
3784 int readonly
, int is_dev_replace
);
3785 void btrfs_scrub_pause(struct btrfs_root
*root
);
3786 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3787 void btrfs_scrub_continue(struct btrfs_root
*root
);
3788 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3789 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3790 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3791 struct btrfs_device
*dev
);
3792 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3793 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3794 struct btrfs_scrub_progress
*progress
);
3797 struct reada_control
{
3798 struct btrfs_root
*root
; /* tree to prefetch */
3799 struct btrfs_key key_start
;
3800 struct btrfs_key key_end
; /* exclusive */
3803 wait_queue_head_t wait
;
3805 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3806 struct btrfs_key
*start
, struct btrfs_key
*end
);
3807 int btrfs_reada_wait(void *handle
);
3808 void btrfs_reada_detach(void *handle
);
3809 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3810 u64 start
, int err
);
3813 struct qgroup_update
{
3814 struct list_head list
;
3815 struct btrfs_delayed_ref_node
*node
;
3816 struct btrfs_delayed_extent_op
*extent_op
;
3819 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
3820 struct btrfs_fs_info
*fs_info
);
3821 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
3822 struct btrfs_fs_info
*fs_info
);
3823 int btrfs_quota_rescan(struct btrfs_fs_info
*fs_info
);
3824 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
3825 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3826 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
3827 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3828 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
3829 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3831 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
3832 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
3833 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
3834 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3835 struct btrfs_qgroup_limit
*limit
);
3836 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
3837 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
3838 struct btrfs_delayed_extent_op
;
3839 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
3840 struct btrfs_delayed_ref_node
*node
,
3841 struct btrfs_delayed_extent_op
*extent_op
);
3842 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
3843 struct btrfs_fs_info
*fs_info
,
3844 struct btrfs_delayed_ref_node
*node
,
3845 struct btrfs_delayed_extent_op
*extent_op
);
3846 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
3847 struct btrfs_fs_info
*fs_info
);
3848 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
3849 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
3850 struct btrfs_qgroup_inherit
*inherit
);
3851 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
3852 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
3854 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
3856 static inline int is_fstree(u64 rootid
)
3858 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3859 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)
3864 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3866 return signal_pending(current
);