2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include "extent_io.h"
37 #include "extent_map.h"
38 #include "async-thread.h"
40 struct btrfs_trans_handle
;
41 struct btrfs_transaction
;
42 struct btrfs_pending_snapshot
;
43 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
44 extern struct kmem_cache
*btrfs_transaction_cachep
;
45 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
46 extern struct kmem_cache
*btrfs_path_cachep
;
47 extern struct kmem_cache
*btrfs_free_space_cachep
;
48 struct btrfs_ordered_sum
;
50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
52 #define BTRFS_MAX_MIRRORS 3
54 #define BTRFS_MAX_LEVEL 8
56 #define BTRFS_COMPAT_EXTENT_TREE_V0
59 * files bigger than this get some pre-flushing when they are added
60 * to the ordered operations list. That way we limit the total
61 * work done by the commit
63 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
65 /* holds pointers to all of the tree roots */
66 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
68 /* stores information about which extents are in use, and reference counts */
69 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
72 * chunk tree stores translations from logical -> physical block numbering
73 * the super block points to the chunk tree
75 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
78 * stores information about which areas of a given device are in use.
79 * one per device. The tree of tree roots points to the device tree
81 #define BTRFS_DEV_TREE_OBJECTID 4ULL
83 /* one per subvolume, storing files and directories */
84 #define BTRFS_FS_TREE_OBJECTID 5ULL
86 /* directory objectid inside the root tree */
87 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
89 /* holds checksums of all the data extents */
90 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
92 /* holds quota configuration and tracking */
93 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
95 /* for storing items that use the BTRFS_UUID_KEY* types */
96 #define BTRFS_UUID_TREE_OBJECTID 9ULL
98 /* for storing balance parameters in the root tree */
99 #define BTRFS_BALANCE_OBJECTID -4ULL
101 /* orhpan objectid for tracking unlinked/truncated files */
102 #define BTRFS_ORPHAN_OBJECTID -5ULL
104 /* does write ahead logging to speed up fsyncs */
105 #define BTRFS_TREE_LOG_OBJECTID -6ULL
106 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
108 /* for space balancing */
109 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
110 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
113 * extent checksums all have this objectid
114 * this allows them to share the logging tree
117 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
119 /* For storing free space cache */
120 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
123 * The inode number assigned to the special inode for storing
126 #define BTRFS_FREE_INO_OBJECTID -12ULL
128 /* dummy objectid represents multiple objectids */
129 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
132 * All files have objectids in this range.
134 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
135 #define BTRFS_LAST_FREE_OBJECTID -256ULL
136 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
140 * the device items go into the chunk tree. The key is in the form
141 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
143 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
145 #define BTRFS_BTREE_INODE_OBJECTID 1
147 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
149 #define BTRFS_DEV_REPLACE_DEVID 0
152 * the max metadata block size. This limit is somewhat artificial,
153 * but the memmove costs go through the roof for larger blocks.
155 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
158 * we can actually store much bigger names, but lets not confuse the rest
161 #define BTRFS_NAME_LEN 255
164 * Theoretical limit is larger, but we keep this down to a sane
165 * value. That should limit greatly the possibility of collisions on
168 #define BTRFS_LINK_MAX 65535U
170 /* 32 bytes in various csum fields */
171 #define BTRFS_CSUM_SIZE 32
174 #define BTRFS_CSUM_TYPE_CRC32 0
176 static int btrfs_csum_sizes
[] = { 4, 0 };
178 /* four bytes for CRC32 */
179 #define BTRFS_EMPTY_DIR_SIZE 0
181 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
182 #define REQ_GET_READ_MIRRORS (1 << 30)
184 #define BTRFS_FT_UNKNOWN 0
185 #define BTRFS_FT_REG_FILE 1
186 #define BTRFS_FT_DIR 2
187 #define BTRFS_FT_CHRDEV 3
188 #define BTRFS_FT_BLKDEV 4
189 #define BTRFS_FT_FIFO 5
190 #define BTRFS_FT_SOCK 6
191 #define BTRFS_FT_SYMLINK 7
192 #define BTRFS_FT_XATTR 8
193 #define BTRFS_FT_MAX 9
195 /* ioprio of readahead is set to idle */
196 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
198 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
201 * The key defines the order in the tree, and so it also defines (optimal)
204 * objectid corresponds to the inode number.
206 * type tells us things about the object, and is a kind of stream selector.
207 * so for a given inode, keys with type of 1 might refer to the inode data,
208 * type of 2 may point to file data in the btree and type == 3 may point to
211 * offset is the starting byte offset for this key in the stream.
213 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
214 * in cpu native order. Otherwise they are identical and their sizes
215 * should be the same (ie both packed)
217 struct btrfs_disk_key
{
221 } __attribute__ ((__packed__
));
227 } __attribute__ ((__packed__
));
229 struct btrfs_mapping_tree
{
230 struct extent_map_tree map_tree
;
233 struct btrfs_dev_item
{
234 /* the internal btrfs device id */
237 /* size of the device */
243 /* optimal io alignment for this device */
246 /* optimal io width for this device */
249 /* minimal io size for this device */
252 /* type and info about this device */
255 /* expected generation for this device */
259 * starting byte of this partition on the device,
260 * to allow for stripe alignment in the future
264 /* grouping information for allocation decisions */
267 /* seek speed 0-100 where 100 is fastest */
270 /* bandwidth 0-100 where 100 is fastest */
273 /* btrfs generated uuid for this device */
274 u8 uuid
[BTRFS_UUID_SIZE
];
276 /* uuid of FS who owns this device */
277 u8 fsid
[BTRFS_UUID_SIZE
];
278 } __attribute__ ((__packed__
));
280 struct btrfs_stripe
{
283 u8 dev_uuid
[BTRFS_UUID_SIZE
];
284 } __attribute__ ((__packed__
));
287 /* size of this chunk in bytes */
290 /* objectid of the root referencing this chunk */
296 /* optimal io alignment for this chunk */
299 /* optimal io width for this chunk */
302 /* minimal io size for this chunk */
305 /* 2^16 stripes is quite a lot, a second limit is the size of a single
310 /* sub stripes only matter for raid10 */
312 struct btrfs_stripe stripe
;
313 /* additional stripes go here */
314 } __attribute__ ((__packed__
));
316 #define BTRFS_FREE_SPACE_EXTENT 1
317 #define BTRFS_FREE_SPACE_BITMAP 2
319 struct btrfs_free_space_entry
{
323 } __attribute__ ((__packed__
));
325 struct btrfs_free_space_header
{
326 struct btrfs_disk_key location
;
330 } __attribute__ ((__packed__
));
332 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
334 BUG_ON(num_stripes
== 0);
335 return sizeof(struct btrfs_chunk
) +
336 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
339 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
340 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
345 #define BTRFS_FS_STATE_ERROR 0
346 #define BTRFS_FS_STATE_REMOUNTING 1
347 #define BTRFS_FS_STATE_TRANS_ABORTED 2
349 /* Super block flags */
350 /* Errors detected */
351 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
353 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
354 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
356 #define BTRFS_BACKREF_REV_MAX 256
357 #define BTRFS_BACKREF_REV_SHIFT 56
358 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
359 BTRFS_BACKREF_REV_SHIFT)
361 #define BTRFS_OLD_BACKREF_REV 0
362 #define BTRFS_MIXED_BACKREF_REV 1
365 * every tree block (leaf or node) starts with this header.
367 struct btrfs_header
{
368 /* these first four must match the super block */
369 u8 csum
[BTRFS_CSUM_SIZE
];
370 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
371 __le64 bytenr
; /* which block this node is supposed to live in */
374 /* allowed to be different from the super from here on down */
375 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
380 } __attribute__ ((__packed__
));
382 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
383 sizeof(struct btrfs_header)) / \
384 sizeof(struct btrfs_key_ptr))
385 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
386 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
387 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
388 sizeof(struct btrfs_item) - \
389 sizeof(struct btrfs_file_extent_item))
390 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
391 sizeof(struct btrfs_item) -\
392 sizeof(struct btrfs_dir_item))
396 * this is a very generous portion of the super block, giving us
397 * room to translate 14 chunks with 3 stripes each.
399 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
400 #define BTRFS_LABEL_SIZE 256
403 * just in case we somehow lose the roots and are not able to mount,
404 * we store an array of the roots from previous transactions
407 #define BTRFS_NUM_BACKUP_ROOTS 4
408 struct btrfs_root_backup
{
410 __le64 tree_root_gen
;
413 __le64 chunk_root_gen
;
416 __le64 extent_root_gen
;
425 __le64 csum_root_gen
;
435 u8 extent_root_level
;
439 /* future and to align */
441 } __attribute__ ((__packed__
));
444 * the super block basically lists the main trees of the FS
445 * it currently lacks any block count etc etc
447 struct btrfs_super_block
{
448 u8 csum
[BTRFS_CSUM_SIZE
];
449 /* the first 4 fields must match struct btrfs_header */
450 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
451 __le64 bytenr
; /* this block number */
454 /* allowed to be different from the btrfs_header from here own down */
461 /* this will help find the new super based on the log root */
462 __le64 log_root_transid
;
465 __le64 root_dir_objectid
;
471 __le32 sys_chunk_array_size
;
472 __le64 chunk_root_generation
;
474 __le64 compat_ro_flags
;
475 __le64 incompat_flags
;
480 struct btrfs_dev_item dev_item
;
482 char label
[BTRFS_LABEL_SIZE
];
484 __le64 cache_generation
;
486 /* future expansion */
488 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
489 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
490 } __attribute__ ((__packed__
));
493 * Compat flags that we support. If any incompat flags are set other than the
494 * ones specified below then we will fail to mount
496 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
497 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
498 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
499 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
501 * some patches floated around with a second compression method
502 * lets save that incompat here for when they do get in
503 * Note we don't actually support it, we're just reserving the
506 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
509 * older kernels tried to do bigger metadata blocks, but the
510 * code was pretty buggy. Lets not let them try anymore.
512 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
514 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
515 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
516 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
518 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
519 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
520 #define BTRFS_FEATURE_INCOMPAT_SUPP \
521 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
522 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
523 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
524 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
525 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
526 BTRFS_FEATURE_INCOMPAT_RAID56 | \
527 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
528 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
531 * A leaf is full of items. offset and size tell us where to find
532 * the item in the leaf (relative to the start of the data area)
535 struct btrfs_disk_key key
;
538 } __attribute__ ((__packed__
));
541 * leaves have an item area and a data area:
542 * [item0, item1....itemN] [free space] [dataN...data1, data0]
544 * The data is separate from the items to get the keys closer together
548 struct btrfs_header header
;
549 struct btrfs_item items
[];
550 } __attribute__ ((__packed__
));
553 * all non-leaf blocks are nodes, they hold only keys and pointers to
556 struct btrfs_key_ptr
{
557 struct btrfs_disk_key key
;
560 } __attribute__ ((__packed__
));
563 struct btrfs_header header
;
564 struct btrfs_key_ptr ptrs
[];
565 } __attribute__ ((__packed__
));
568 * btrfs_paths remember the path taken from the root down to the leaf.
569 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
570 * to any other levels that are present.
572 * The slots array records the index of the item or block pointer
573 * used while walking the tree.
576 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
577 int slots
[BTRFS_MAX_LEVEL
];
578 /* if there is real range locking, this locks field will change */
579 int locks
[BTRFS_MAX_LEVEL
];
581 /* keep some upper locks as we walk down */
585 * set by btrfs_split_item, tells search_slot to keep all locks
586 * and to force calls to keep space in the nodes
588 unsigned int search_for_split
:1;
589 unsigned int keep_locks
:1;
590 unsigned int skip_locking
:1;
591 unsigned int leave_spinning
:1;
592 unsigned int search_commit_root
:1;
596 * items in the extent btree are used to record the objectid of the
597 * owner of the block and the number of references
600 struct btrfs_extent_item
{
604 } __attribute__ ((__packed__
));
606 struct btrfs_extent_item_v0
{
608 } __attribute__ ((__packed__
));
610 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
611 sizeof(struct btrfs_item))
613 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
614 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
616 /* following flags only apply to tree blocks */
618 /* use full backrefs for extent pointers in the block */
619 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
622 * this flag is only used internally by scrub and may be changed at any time
623 * it is only declared here to avoid collisions
625 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
627 struct btrfs_tree_block_info
{
628 struct btrfs_disk_key key
;
630 } __attribute__ ((__packed__
));
632 struct btrfs_extent_data_ref
{
637 } __attribute__ ((__packed__
));
639 struct btrfs_shared_data_ref
{
641 } __attribute__ ((__packed__
));
643 struct btrfs_extent_inline_ref
{
646 } __attribute__ ((__packed__
));
648 /* old style backrefs item */
649 struct btrfs_extent_ref_v0
{
654 } __attribute__ ((__packed__
));
657 /* dev extents record free space on individual devices. The owner
658 * field points back to the chunk allocation mapping tree that allocated
659 * the extent. The chunk tree uuid field is a way to double check the owner
661 struct btrfs_dev_extent
{
663 __le64 chunk_objectid
;
666 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
667 } __attribute__ ((__packed__
));
669 struct btrfs_inode_ref
{
673 } __attribute__ ((__packed__
));
675 struct btrfs_inode_extref
{
676 __le64 parent_objectid
;
681 } __attribute__ ((__packed__
));
683 struct btrfs_timespec
{
686 } __attribute__ ((__packed__
));
688 enum btrfs_compression_type
{
689 BTRFS_COMPRESS_NONE
= 0,
690 BTRFS_COMPRESS_ZLIB
= 1,
691 BTRFS_COMPRESS_LZO
= 2,
692 BTRFS_COMPRESS_TYPES
= 2,
693 BTRFS_COMPRESS_LAST
= 3,
696 struct btrfs_inode_item
{
697 /* nfs style generation number */
699 /* transid that last touched this inode */
711 /* modification sequence number for NFS */
715 * a little future expansion, for more than this we can
716 * just grow the inode item and version it
719 struct btrfs_timespec atime
;
720 struct btrfs_timespec ctime
;
721 struct btrfs_timespec mtime
;
722 struct btrfs_timespec otime
;
723 } __attribute__ ((__packed__
));
725 struct btrfs_dir_log_item
{
727 } __attribute__ ((__packed__
));
729 struct btrfs_dir_item
{
730 struct btrfs_disk_key location
;
735 } __attribute__ ((__packed__
));
737 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
739 struct btrfs_root_item
{
740 struct btrfs_inode_item inode
;
746 __le64 last_snapshot
;
749 struct btrfs_disk_key drop_progress
;
754 * The following fields appear after subvol_uuids+subvol_times
759 * This generation number is used to test if the new fields are valid
760 * and up to date while reading the root item. Everytime the root item
761 * is written out, the "generation" field is copied into this field. If
762 * anyone ever mounted the fs with an older kernel, we will have
763 * mismatching generation values here and thus must invalidate the
764 * new fields. See btrfs_update_root and btrfs_find_last_root for
766 * the offset of generation_v2 is also used as the start for the memset
767 * when invalidating the fields.
769 __le64 generation_v2
;
770 u8 uuid
[BTRFS_UUID_SIZE
];
771 u8 parent_uuid
[BTRFS_UUID_SIZE
];
772 u8 received_uuid
[BTRFS_UUID_SIZE
];
773 __le64 ctransid
; /* updated when an inode changes */
774 __le64 otransid
; /* trans when created */
775 __le64 stransid
; /* trans when sent. non-zero for received subvol */
776 __le64 rtransid
; /* trans when received. non-zero for received subvol */
777 struct btrfs_timespec ctime
;
778 struct btrfs_timespec otime
;
779 struct btrfs_timespec stime
;
780 struct btrfs_timespec rtime
;
781 __le64 reserved
[8]; /* for future */
782 } __attribute__ ((__packed__
));
785 * this is used for both forward and backward root refs
787 struct btrfs_root_ref
{
791 } __attribute__ ((__packed__
));
793 struct btrfs_disk_balance_args
{
795 * profiles to operate on, single is denoted by
796 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
806 /* devid subset filter [pstart..pend) */
810 /* btrfs virtual address space subset filter [vstart..vend) */
815 * profile to convert to, single is denoted by
816 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
820 /* BTRFS_BALANCE_ARGS_* */
824 } __attribute__ ((__packed__
));
827 * store balance parameters to disk so that balance can be properly
828 * resumed after crash or unmount
830 struct btrfs_balance_item
{
831 /* BTRFS_BALANCE_* */
834 struct btrfs_disk_balance_args data
;
835 struct btrfs_disk_balance_args meta
;
836 struct btrfs_disk_balance_args sys
;
839 } __attribute__ ((__packed__
));
841 #define BTRFS_FILE_EXTENT_INLINE 0
842 #define BTRFS_FILE_EXTENT_REG 1
843 #define BTRFS_FILE_EXTENT_PREALLOC 2
845 struct btrfs_file_extent_item
{
847 * transaction id that created this extent
851 * max number of bytes to hold this extent in ram
852 * when we split a compressed extent we can't know how big
853 * each of the resulting pieces will be. So, this is
854 * an upper limit on the size of the extent in ram instead of
860 * 32 bits for the various ways we might encode the data,
861 * including compression and encryption. If any of these
862 * are set to something a given disk format doesn't understand
863 * it is treated like an incompat flag for reading and writing,
868 __le16 other_encoding
; /* spare for later use */
870 /* are we inline data or a real extent? */
874 * disk space consumed by the extent, checksum blocks are included
878 __le64 disk_num_bytes
;
880 * the logical offset in file blocks (no csums)
881 * this extent record is for. This allows a file extent to point
882 * into the middle of an existing extent on disk, sharing it
883 * between two snapshots (useful if some bytes in the middle of the
884 * extent have changed
888 * the logical number of file blocks (no csums included). This
889 * always reflects the size uncompressed and without encoding.
893 } __attribute__ ((__packed__
));
895 struct btrfs_csum_item
{
897 } __attribute__ ((__packed__
));
899 struct btrfs_dev_stats_item
{
901 * grow this item struct at the end for future enhancements and keep
902 * the existing values unchanged
904 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
905 } __attribute__ ((__packed__
));
907 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
908 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
909 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
910 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
911 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
912 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
913 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
915 struct btrfs_dev_replace
{
916 u64 replace_state
; /* see #define above */
917 u64 time_started
; /* seconds since 1-Jan-1970 */
918 u64 time_stopped
; /* seconds since 1-Jan-1970 */
919 atomic64_t num_write_errors
;
920 atomic64_t num_uncorrectable_read_errors
;
923 u64 committed_cursor_left
;
924 u64 cursor_left_last_write_of_item
;
927 u64 cont_reading_from_srcdev_mode
; /* see #define above */
930 int item_needs_writeback
;
931 struct btrfs_device
*srcdev
;
932 struct btrfs_device
*tgtdev
;
935 atomic_t nesting_level
;
936 struct mutex lock_finishing_cancel_unmount
;
937 struct mutex lock_management_lock
;
940 struct btrfs_scrub_progress scrub_progress
;
943 struct btrfs_dev_replace_item
{
945 * grow this item struct at the end for future enhancements and keep
946 * the existing values unchanged
951 __le64 cont_reading_from_srcdev_mode
;
953 __le64 replace_state
;
956 __le64 num_write_errors
;
957 __le64 num_uncorrectable_read_errors
;
958 } __attribute__ ((__packed__
));
960 /* different types of block groups (and chunks) */
961 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
962 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
963 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
964 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
965 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
966 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
967 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
968 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
969 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
970 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
972 enum btrfs_raid_types
{
983 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
984 BTRFS_BLOCK_GROUP_SYSTEM | \
985 BTRFS_BLOCK_GROUP_METADATA)
987 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
988 BTRFS_BLOCK_GROUP_RAID1 | \
989 BTRFS_BLOCK_GROUP_RAID5 | \
990 BTRFS_BLOCK_GROUP_RAID6 | \
991 BTRFS_BLOCK_GROUP_DUP | \
992 BTRFS_BLOCK_GROUP_RAID10)
994 * We need a bit for restriper to be able to tell when chunks of type
995 * SINGLE are available. This "extended" profile format is used in
996 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
997 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
998 * to avoid remappings between two formats in future.
1000 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1002 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1003 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1005 static inline u64
chunk_to_extended(u64 flags
)
1007 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1008 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1012 static inline u64
extended_to_chunk(u64 flags
)
1014 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1017 struct btrfs_block_group_item
{
1019 __le64 chunk_objectid
;
1021 } __attribute__ ((__packed__
));
1024 * is subvolume quota turned on?
1026 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1028 * RESCAN is set during the initialization phase
1030 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1032 * Some qgroup entries are known to be out of date,
1033 * either because the configuration has changed in a way that
1034 * makes a rescan necessary, or because the fs has been mounted
1035 * with a non-qgroup-aware version.
1036 * Turning qouta off and on again makes it inconsistent, too.
1038 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1040 #define BTRFS_QGROUP_STATUS_VERSION 1
1042 struct btrfs_qgroup_status_item
{
1045 * the generation is updated during every commit. As older
1046 * versions of btrfs are not aware of qgroups, it will be
1047 * possible to detect inconsistencies by checking the
1048 * generation on mount time
1052 /* flag definitions see above */
1056 * only used during scanning to record the progress
1057 * of the scan. It contains a logical address
1060 } __attribute__ ((__packed__
));
1062 struct btrfs_qgroup_info_item
{
1068 } __attribute__ ((__packed__
));
1070 /* flags definition for qgroup limits */
1071 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1072 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1073 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1074 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1075 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1076 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1078 struct btrfs_qgroup_limit_item
{
1080 * only updated when any of the other values change
1087 } __attribute__ ((__packed__
));
1089 struct btrfs_space_info
{
1092 u64 total_bytes
; /* total bytes in the space,
1093 this doesn't take mirrors into account */
1094 u64 bytes_used
; /* total bytes used,
1095 this doesn't take mirrors into account */
1096 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1097 transaction finishes */
1098 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1099 current allocations */
1100 u64 bytes_readonly
; /* total bytes that are read only */
1102 u64 bytes_may_use
; /* number of bytes that may be used for
1103 delalloc/allocations */
1104 u64 disk_used
; /* total bytes used on disk */
1105 u64 disk_total
; /* total bytes on disk, takes mirrors into
1109 * bytes_pinned is kept in line with what is actually pinned, as in
1110 * we've called update_block_group and dropped the bytes_used counter
1111 * and increased the bytes_pinned counter. However this means that
1112 * bytes_pinned does not reflect the bytes that will be pinned once the
1113 * delayed refs are flushed, so this counter is inc'ed everytime we call
1114 * btrfs_free_extent so it is a realtime count of what will be freed
1115 * once the transaction is committed. It will be zero'ed everytime the
1116 * transaction commits.
1118 struct percpu_counter total_bytes_pinned
;
1121 * we bump reservation progress every time we decrement
1122 * bytes_reserved. This way people waiting for reservations
1123 * know something good has happened and they can check
1124 * for progress. The number here isn't to be trusted, it
1125 * just shows reclaim activity
1127 unsigned long reservation_progress
;
1129 unsigned int full
:1; /* indicates that we cannot allocate any more
1130 chunks for this space */
1131 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1133 unsigned int flush
:1; /* set if we are trying to make space */
1135 unsigned int force_alloc
; /* set if we need to force a chunk
1136 alloc for this space */
1138 struct list_head list
;
1140 /* for block groups in our same type */
1141 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1143 struct rw_semaphore groups_sem
;
1144 wait_queue_head_t wait
;
1147 #define BTRFS_BLOCK_RSV_GLOBAL 1
1148 #define BTRFS_BLOCK_RSV_DELALLOC 2
1149 #define BTRFS_BLOCK_RSV_TRANS 3
1150 #define BTRFS_BLOCK_RSV_CHUNK 4
1151 #define BTRFS_BLOCK_RSV_DELOPS 5
1152 #define BTRFS_BLOCK_RSV_EMPTY 6
1153 #define BTRFS_BLOCK_RSV_TEMP 7
1155 struct btrfs_block_rsv
{
1158 struct btrfs_space_info
*space_info
;
1160 unsigned short full
;
1161 unsigned short type
;
1162 unsigned short failfast
;
1166 * free clusters are used to claim free space in relatively large chunks,
1167 * allowing us to do less seeky writes. They are used for all metadata
1168 * allocations and data allocations in ssd mode.
1170 struct btrfs_free_cluster
{
1172 spinlock_t refill_lock
;
1173 struct rb_root root
;
1175 /* largest extent in this cluster */
1178 /* first extent starting offset */
1181 struct btrfs_block_group_cache
*block_group
;
1183 * when a cluster is allocated from a block group, we put the
1184 * cluster onto a list in the block group so that it can
1185 * be freed before the block group is freed.
1187 struct list_head block_group_list
;
1190 enum btrfs_caching_type
{
1192 BTRFS_CACHE_STARTED
= 1,
1193 BTRFS_CACHE_FAST
= 2,
1194 BTRFS_CACHE_FINISHED
= 3,
1195 BTRFS_CACHE_ERROR
= 4,
1198 enum btrfs_disk_cache_state
{
1199 BTRFS_DC_WRITTEN
= 0,
1203 BTRFS_DC_NEED_WRITE
= 4,
1206 struct btrfs_caching_control
{
1207 struct list_head list
;
1209 wait_queue_head_t wait
;
1210 struct btrfs_work work
;
1211 struct btrfs_block_group_cache
*block_group
;
1216 struct btrfs_block_group_cache
{
1217 struct btrfs_key key
;
1218 struct btrfs_block_group_item item
;
1219 struct btrfs_fs_info
*fs_info
;
1220 struct inode
*inode
;
1227 u64 cache_generation
;
1229 /* for raid56, this is a full stripe, without parity */
1230 unsigned long full_stripe_len
;
1233 unsigned int dirty
:1;
1234 unsigned int iref
:1;
1236 int disk_cache_state
;
1238 /* cache tracking stuff */
1240 struct btrfs_caching_control
*caching_ctl
;
1241 u64 last_byte_to_unpin
;
1243 struct btrfs_space_info
*space_info
;
1245 /* free space cache stuff */
1246 struct btrfs_free_space_ctl
*free_space_ctl
;
1248 /* block group cache stuff */
1249 struct rb_node cache_node
;
1251 /* for block groups in the same raid type */
1252 struct list_head list
;
1257 /* List of struct btrfs_free_clusters for this block group.
1258 * Today it will only have one thing on it, but that may change
1260 struct list_head cluster_list
;
1262 /* For delayed block group creation */
1263 struct list_head new_bg_list
;
1266 /* delayed seq elem */
1268 struct list_head list
;
1272 enum btrfs_orphan_cleanup_state
{
1273 ORPHAN_CLEANUP_STARTED
= 1,
1274 ORPHAN_CLEANUP_DONE
= 2,
1277 /* used by the raid56 code to lock stripes for read/modify/write */
1278 struct btrfs_stripe_hash
{
1279 struct list_head hash_list
;
1280 wait_queue_head_t wait
;
1284 /* used by the raid56 code to lock stripes for read/modify/write */
1285 struct btrfs_stripe_hash_table
{
1286 struct list_head stripe_cache
;
1287 spinlock_t cache_lock
;
1289 struct btrfs_stripe_hash table
[];
1292 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1295 struct reloc_control
;
1296 struct btrfs_device
;
1297 struct btrfs_fs_devices
;
1298 struct btrfs_balance_control
;
1299 struct btrfs_delayed_root
;
1300 struct btrfs_fs_info
{
1301 u8 fsid
[BTRFS_FSID_SIZE
];
1302 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1303 struct btrfs_root
*extent_root
;
1304 struct btrfs_root
*tree_root
;
1305 struct btrfs_root
*chunk_root
;
1306 struct btrfs_root
*dev_root
;
1307 struct btrfs_root
*fs_root
;
1308 struct btrfs_root
*csum_root
;
1309 struct btrfs_root
*quota_root
;
1310 struct btrfs_root
*uuid_root
;
1312 /* the log root tree is a directory of all the other log roots */
1313 struct btrfs_root
*log_root_tree
;
1315 spinlock_t fs_roots_radix_lock
;
1316 struct radix_tree_root fs_roots_radix
;
1318 /* block group cache stuff */
1319 spinlock_t block_group_cache_lock
;
1320 u64 first_logical_byte
;
1321 struct rb_root block_group_cache_tree
;
1323 /* keep track of unallocated space */
1324 spinlock_t free_chunk_lock
;
1325 u64 free_chunk_space
;
1327 struct extent_io_tree freed_extents
[2];
1328 struct extent_io_tree
*pinned_extents
;
1330 /* logical->physical extent mapping */
1331 struct btrfs_mapping_tree mapping_tree
;
1334 * block reservation for extent, checksum, root tree and
1335 * delayed dir index item
1337 struct btrfs_block_rsv global_block_rsv
;
1338 /* block reservation for delay allocation */
1339 struct btrfs_block_rsv delalloc_block_rsv
;
1340 /* block reservation for metadata operations */
1341 struct btrfs_block_rsv trans_block_rsv
;
1342 /* block reservation for chunk tree */
1343 struct btrfs_block_rsv chunk_block_rsv
;
1344 /* block reservation for delayed operations */
1345 struct btrfs_block_rsv delayed_block_rsv
;
1347 struct btrfs_block_rsv empty_block_rsv
;
1350 u64 last_trans_committed
;
1353 * this is updated to the current trans every time a full commit
1354 * is required instead of the faster short fsync log commits
1356 u64 last_trans_log_full_commit
;
1357 unsigned long mount_opt
;
1358 unsigned long compress_type
:4;
1359 int commit_interval
;
1361 * It is a suggestive number, the read side is safe even it gets a
1362 * wrong number because we will write out the data into a regular
1363 * extent. The write side(mount/remount) is under ->s_umount lock,
1364 * so it is also safe.
1368 * Protected by ->chunk_mutex and sb->s_umount.
1370 * The reason that we use two lock to protect it is because only
1371 * remount and mount operations can change it and these two operations
1372 * are under sb->s_umount, but the read side (chunk allocation) can not
1373 * acquire sb->s_umount or the deadlock would happen. So we use two
1374 * locks to protect it. On the write side, we must acquire two locks,
1375 * and on the read side, we just need acquire one of them.
1378 struct btrfs_transaction
*running_transaction
;
1379 wait_queue_head_t transaction_throttle
;
1380 wait_queue_head_t transaction_wait
;
1381 wait_queue_head_t transaction_blocked_wait
;
1382 wait_queue_head_t async_submit_wait
;
1385 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1386 * when they are updated.
1388 * Because we do not clear the flags for ever, so we needn't use
1389 * the lock on the read side.
1391 * We also needn't use the lock when we mount the fs, because
1392 * there is no other task which will update the flag.
1394 spinlock_t super_lock
;
1395 struct btrfs_super_block
*super_copy
;
1396 struct btrfs_super_block
*super_for_commit
;
1397 struct block_device
*__bdev
;
1398 struct super_block
*sb
;
1399 struct inode
*btree_inode
;
1400 struct backing_dev_info bdi
;
1401 struct mutex tree_log_mutex
;
1402 struct mutex transaction_kthread_mutex
;
1403 struct mutex cleaner_mutex
;
1404 struct mutex chunk_mutex
;
1405 struct mutex volume_mutex
;
1407 /* this is used during read/modify/write to make sure
1408 * no two ios are trying to mod the same stripe at the same
1411 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1414 * this protects the ordered operations list only while we are
1415 * processing all of the entries on it. This way we make
1416 * sure the commit code doesn't find the list temporarily empty
1417 * because another function happens to be doing non-waiting preflush
1418 * before jumping into the main commit.
1420 struct mutex ordered_operations_mutex
;
1423 * Same as ordered_operations_mutex except this is for ordered extents
1424 * and not the operations.
1426 struct mutex ordered_extent_flush_mutex
;
1428 struct rw_semaphore extent_commit_sem
;
1430 struct rw_semaphore cleanup_work_sem
;
1432 struct rw_semaphore subvol_sem
;
1433 struct srcu_struct subvol_srcu
;
1435 spinlock_t trans_lock
;
1437 * the reloc mutex goes with the trans lock, it is taken
1438 * during commit to protect us from the relocation code
1440 struct mutex reloc_mutex
;
1442 struct list_head trans_list
;
1443 struct list_head dead_roots
;
1444 struct list_head caching_block_groups
;
1446 spinlock_t delayed_iput_lock
;
1447 struct list_head delayed_iputs
;
1449 /* this protects tree_mod_seq_list */
1450 spinlock_t tree_mod_seq_lock
;
1451 atomic64_t tree_mod_seq
;
1452 struct list_head tree_mod_seq_list
;
1453 struct seq_list tree_mod_seq_elem
;
1455 /* this protects tree_mod_log */
1456 rwlock_t tree_mod_log_lock
;
1457 struct rb_root tree_mod_log
;
1459 atomic_t nr_async_submits
;
1460 atomic_t async_submit_draining
;
1461 atomic_t nr_async_bios
;
1462 atomic_t async_delalloc_pages
;
1463 atomic_t open_ioctl_trans
;
1466 * this is used to protect the following list -- ordered_roots.
1468 spinlock_t ordered_root_lock
;
1471 * all fs/file tree roots in which there are data=ordered extents
1472 * pending writeback are added into this list.
1474 * these can span multiple transactions and basically include
1475 * every dirty data page that isn't from nodatacow
1477 struct list_head ordered_roots
;
1479 spinlock_t delalloc_root_lock
;
1480 /* all fs/file tree roots that have delalloc inodes. */
1481 struct list_head delalloc_roots
;
1484 * there is a pool of worker threads for checksumming during writes
1485 * and a pool for checksumming after reads. This is because readers
1486 * can run with FS locks held, and the writers may be waiting for
1487 * those locks. We don't want ordering in the pending list to cause
1488 * deadlocks, and so the two are serviced separately.
1490 * A third pool does submit_bio to avoid deadlocking with the other
1493 struct btrfs_workers generic_worker
;
1494 struct btrfs_workers workers
;
1495 struct btrfs_workers delalloc_workers
;
1496 struct btrfs_workers flush_workers
;
1497 struct btrfs_workers endio_workers
;
1498 struct btrfs_workers endio_meta_workers
;
1499 struct btrfs_workers endio_raid56_workers
;
1500 struct btrfs_workers rmw_workers
;
1501 struct btrfs_workers endio_meta_write_workers
;
1502 struct btrfs_workers endio_write_workers
;
1503 struct btrfs_workers endio_freespace_worker
;
1504 struct btrfs_workers submit_workers
;
1505 struct btrfs_workers caching_workers
;
1506 struct btrfs_workers readahead_workers
;
1509 * fixup workers take dirty pages that didn't properly go through
1510 * the cow mechanism and make them safe to write. It happens
1511 * for the sys_munmap function call path
1513 struct btrfs_workers fixup_workers
;
1514 struct btrfs_workers delayed_workers
;
1515 struct task_struct
*transaction_kthread
;
1516 struct task_struct
*cleaner_kthread
;
1517 int thread_pool_size
;
1519 struct kobject super_kobj
;
1520 struct completion kobj_unregister
;
1523 int log_root_recovering
;
1527 /* used to keep from writing metadata until there is a nice batch */
1528 struct percpu_counter dirty_metadata_bytes
;
1529 struct percpu_counter delalloc_bytes
;
1530 s32 dirty_metadata_batch
;
1533 struct list_head dirty_cowonly_roots
;
1535 struct btrfs_fs_devices
*fs_devices
;
1538 * the space_info list is almost entirely read only. It only changes
1539 * when we add a new raid type to the FS, and that happens
1540 * very rarely. RCU is used to protect it.
1542 struct list_head space_info
;
1544 struct btrfs_space_info
*data_sinfo
;
1546 struct reloc_control
*reloc_ctl
;
1548 /* data_alloc_cluster is only used in ssd mode */
1549 struct btrfs_free_cluster data_alloc_cluster
;
1551 /* all metadata allocations go through this cluster */
1552 struct btrfs_free_cluster meta_alloc_cluster
;
1554 /* auto defrag inodes go here */
1555 spinlock_t defrag_inodes_lock
;
1556 struct rb_root defrag_inodes
;
1557 atomic_t defrag_running
;
1559 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1560 seqlock_t profiles_lock
;
1562 * these three are in extended format (availability of single
1563 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1564 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1566 u64 avail_data_alloc_bits
;
1567 u64 avail_metadata_alloc_bits
;
1568 u64 avail_system_alloc_bits
;
1570 /* restriper state */
1571 spinlock_t balance_lock
;
1572 struct mutex balance_mutex
;
1573 atomic_t balance_running
;
1574 atomic_t balance_pause_req
;
1575 atomic_t balance_cancel_req
;
1576 struct btrfs_balance_control
*balance_ctl
;
1577 wait_queue_head_t balance_wait_q
;
1579 unsigned data_chunk_allocations
;
1580 unsigned metadata_ratio
;
1584 /* private scrub information */
1585 struct mutex scrub_lock
;
1586 atomic_t scrubs_running
;
1587 atomic_t scrub_pause_req
;
1588 atomic_t scrubs_paused
;
1589 atomic_t scrub_cancel_req
;
1590 wait_queue_head_t scrub_pause_wait
;
1591 struct rw_semaphore scrub_super_lock
;
1592 int scrub_workers_refcnt
;
1593 struct btrfs_workers scrub_workers
;
1594 struct btrfs_workers scrub_wr_completion_workers
;
1595 struct btrfs_workers scrub_nocow_workers
;
1597 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1598 u32 check_integrity_print_mask
;
1603 unsigned int quota_enabled
:1;
1606 * quota_enabled only changes state after a commit. This holds the
1609 unsigned int pending_quota_state
:1;
1611 /* is qgroup tracking in a consistent state? */
1614 /* holds configuration and tracking. Protected by qgroup_lock */
1615 struct rb_root qgroup_tree
;
1616 spinlock_t qgroup_lock
;
1619 * used to avoid frequently calling ulist_alloc()/ulist_free()
1620 * when doing qgroup accounting, it must be protected by qgroup_lock.
1622 struct ulist
*qgroup_ulist
;
1624 /* protect user change for quota operations */
1625 struct mutex qgroup_ioctl_lock
;
1627 /* list of dirty qgroups to be written at next commit */
1628 struct list_head dirty_qgroups
;
1630 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1633 /* qgroup rescan items */
1634 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1635 struct btrfs_key qgroup_rescan_progress
;
1636 struct btrfs_workers qgroup_rescan_workers
;
1637 struct completion qgroup_rescan_completion
;
1638 struct btrfs_work qgroup_rescan_work
;
1640 /* filesystem state */
1641 unsigned long fs_state
;
1643 struct btrfs_delayed_root
*delayed_root
;
1645 /* readahead tree */
1646 spinlock_t reada_lock
;
1647 struct radix_tree_root reada_tree
;
1649 /* next backup root to be overwritten */
1650 int backup_root_index
;
1652 int num_tolerated_disk_barrier_failures
;
1654 /* device replace state */
1655 struct btrfs_dev_replace dev_replace
;
1657 atomic_t mutually_exclusive_operation_running
;
1659 struct semaphore uuid_tree_rescan_sem
;
1663 * in ram representation of the tree. extent_root is used for all allocations
1664 * and for the extent tree extent_root root.
1667 struct extent_buffer
*node
;
1669 struct extent_buffer
*commit_root
;
1670 struct btrfs_root
*log_root
;
1671 struct btrfs_root
*reloc_root
;
1673 struct btrfs_root_item root_item
;
1674 struct btrfs_key root_key
;
1675 struct btrfs_fs_info
*fs_info
;
1676 struct extent_io_tree dirty_log_pages
;
1678 struct kobject root_kobj
;
1679 struct completion kobj_unregister
;
1680 struct mutex objectid_mutex
;
1682 spinlock_t accounting_lock
;
1683 struct btrfs_block_rsv
*block_rsv
;
1685 /* free ino cache stuff */
1686 struct mutex fs_commit_mutex
;
1687 struct btrfs_free_space_ctl
*free_ino_ctl
;
1688 enum btrfs_caching_type cached
;
1689 spinlock_t cache_lock
;
1690 wait_queue_head_t cache_wait
;
1691 struct btrfs_free_space_ctl
*free_ino_pinned
;
1693 struct inode
*cache_inode
;
1695 struct mutex log_mutex
;
1696 wait_queue_head_t log_writer_wait
;
1697 wait_queue_head_t log_commit_wait
[2];
1698 atomic_t log_writers
;
1699 atomic_t log_commit
[2];
1701 unsigned long log_transid
;
1702 unsigned long last_log_commit
;
1703 pid_t log_start_pid
;
1704 bool log_multiple_pids
;
1709 /* data allocations are done in sectorsize units */
1712 /* node allocations are done in nodesize units */
1715 /* leaf allocations are done in leafsize units */
1722 u64 highest_objectid
;
1724 /* btrfs_record_root_in_trans is a multi-step process,
1725 * and it can race with the balancing code. But the
1726 * race is very small, and only the first time the root
1727 * is added to each transaction. So in_trans_setup
1728 * is used to tell us when more checks are required
1730 unsigned long in_trans_setup
;
1735 u64 defrag_trans_start
;
1736 struct btrfs_key defrag_progress
;
1737 struct btrfs_key defrag_max
;
1741 /* the dirty list is only used by non-reference counted roots */
1742 struct list_head dirty_list
;
1744 struct list_head root_list
;
1746 spinlock_t log_extents_lock
[2];
1747 struct list_head logged_list
[2];
1749 spinlock_t orphan_lock
;
1750 atomic_t orphan_inodes
;
1751 struct btrfs_block_rsv
*orphan_block_rsv
;
1752 int orphan_item_inserted
;
1753 int orphan_cleanup_state
;
1755 spinlock_t inode_lock
;
1756 /* red-black tree that keeps track of in-memory inodes */
1757 struct rb_root inode_tree
;
1760 * radix tree that keeps track of delayed nodes of every inode,
1761 * protected by inode_lock
1763 struct radix_tree_root delayed_nodes_tree
;
1765 * right now this just gets used so that a root has its own devid
1766 * for stat. It may be used for more later
1772 spinlock_t root_item_lock
;
1775 spinlock_t delalloc_lock
;
1777 * all of the inodes that have delalloc bytes. It is possible for
1778 * this list to be empty even when there is still dirty data=ordered
1779 * extents waiting to finish IO.
1781 struct list_head delalloc_inodes
;
1782 struct list_head delalloc_root
;
1783 u64 nr_delalloc_inodes
;
1785 * this is used by the balancing code to wait for all the pending
1788 spinlock_t ordered_extent_lock
;
1791 * all of the data=ordered extents pending writeback
1792 * these can span multiple transactions and basically include
1793 * every dirty data page that isn't from nodatacow
1795 struct list_head ordered_extents
;
1796 struct list_head ordered_root
;
1797 u64 nr_ordered_extents
;
1800 struct btrfs_ioctl_defrag_range_args
{
1801 /* start of the defrag operation */
1804 /* number of bytes to defrag, use (u64)-1 to say all */
1808 * flags for the operation, which can include turning
1809 * on compression for this one defrag
1814 * any extent bigger than this will be considered
1815 * already defragged. Use 0 to take the kernel default
1816 * Use 1 to say every single extent must be rewritten
1818 __u32 extent_thresh
;
1821 * which compression method to use if turning on compression
1822 * for this defrag operation. If unspecified, zlib will
1825 __u32 compress_type
;
1827 /* spare for later */
1833 * inode items have the data typically returned from stat and store other
1834 * info about object characteristics. There is one for every file and dir in
1837 #define BTRFS_INODE_ITEM_KEY 1
1838 #define BTRFS_INODE_REF_KEY 12
1839 #define BTRFS_INODE_EXTREF_KEY 13
1840 #define BTRFS_XATTR_ITEM_KEY 24
1841 #define BTRFS_ORPHAN_ITEM_KEY 48
1842 /* reserve 2-15 close to the inode for later flexibility */
1845 * dir items are the name -> inode pointers in a directory. There is one
1846 * for every name in a directory.
1848 #define BTRFS_DIR_LOG_ITEM_KEY 60
1849 #define BTRFS_DIR_LOG_INDEX_KEY 72
1850 #define BTRFS_DIR_ITEM_KEY 84
1851 #define BTRFS_DIR_INDEX_KEY 96
1853 * extent data is for file data
1855 #define BTRFS_EXTENT_DATA_KEY 108
1858 * extent csums are stored in a separate tree and hold csums for
1859 * an entire extent on disk.
1861 #define BTRFS_EXTENT_CSUM_KEY 128
1864 * root items point to tree roots. They are typically in the root
1865 * tree used by the super block to find all the other trees
1867 #define BTRFS_ROOT_ITEM_KEY 132
1870 * root backrefs tie subvols and snapshots to the directory entries that
1873 #define BTRFS_ROOT_BACKREF_KEY 144
1876 * root refs make a fast index for listing all of the snapshots and
1877 * subvolumes referenced by a given root. They point directly to the
1878 * directory item in the root that references the subvol
1880 #define BTRFS_ROOT_REF_KEY 156
1883 * extent items are in the extent map tree. These record which blocks
1884 * are used, and how many references there are to each block
1886 #define BTRFS_EXTENT_ITEM_KEY 168
1889 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1890 * the length, so we save the level in key->offset instead of the length.
1892 #define BTRFS_METADATA_ITEM_KEY 169
1894 #define BTRFS_TREE_BLOCK_REF_KEY 176
1896 #define BTRFS_EXTENT_DATA_REF_KEY 178
1898 #define BTRFS_EXTENT_REF_V0_KEY 180
1900 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1902 #define BTRFS_SHARED_DATA_REF_KEY 184
1905 * block groups give us hints into the extent allocation trees. Which
1906 * blocks are free etc etc
1908 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1910 #define BTRFS_DEV_EXTENT_KEY 204
1911 #define BTRFS_DEV_ITEM_KEY 216
1912 #define BTRFS_CHUNK_ITEM_KEY 228
1915 * Records the overall state of the qgroups.
1916 * There's only one instance of this key present,
1917 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1919 #define BTRFS_QGROUP_STATUS_KEY 240
1921 * Records the currently used space of the qgroup.
1922 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1924 #define BTRFS_QGROUP_INFO_KEY 242
1926 * Contains the user configured limits for the qgroup.
1927 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1929 #define BTRFS_QGROUP_LIMIT_KEY 244
1931 * Records the child-parent relationship of qgroups. For
1932 * each relation, 2 keys are present:
1933 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1934 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1936 #define BTRFS_QGROUP_RELATION_KEY 246
1938 #define BTRFS_BALANCE_ITEM_KEY 248
1941 * Persistantly stores the io stats in the device tree.
1942 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1944 #define BTRFS_DEV_STATS_KEY 249
1947 * Persistantly stores the device replace state in the device tree.
1948 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1950 #define BTRFS_DEV_REPLACE_KEY 250
1953 * Stores items that allow to quickly map UUIDs to something else.
1954 * These items are part of the filesystem UUID tree.
1955 * The key is built like this:
1956 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1958 #if BTRFS_UUID_SIZE != 16
1959 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1961 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1962 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1963 * received subvols */
1966 * string items are for debugging. They just store a short string of
1969 #define BTRFS_STRING_ITEM_KEY 253
1972 * Flags for mount options.
1974 * Note: don't forget to add new options to btrfs_show_options()
1976 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1977 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1978 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1979 #define BTRFS_MOUNT_SSD (1 << 3)
1980 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1981 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1982 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1983 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1984 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1985 #define BTRFS_MOUNT_NOSSD (1 << 9)
1986 #define BTRFS_MOUNT_DISCARD (1 << 10)
1987 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1988 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1989 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1990 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1991 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1992 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1993 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1994 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1995 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1996 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1997 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1998 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2000 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2002 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2003 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2004 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2005 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2010 #define BTRFS_INODE_NODATASUM (1 << 0)
2011 #define BTRFS_INODE_NODATACOW (1 << 1)
2012 #define BTRFS_INODE_READONLY (1 << 2)
2013 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2014 #define BTRFS_INODE_PREALLOC (1 << 4)
2015 #define BTRFS_INODE_SYNC (1 << 5)
2016 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2017 #define BTRFS_INODE_APPEND (1 << 7)
2018 #define BTRFS_INODE_NODUMP (1 << 8)
2019 #define BTRFS_INODE_NOATIME (1 << 9)
2020 #define BTRFS_INODE_DIRSYNC (1 << 10)
2021 #define BTRFS_INODE_COMPRESS (1 << 11)
2023 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2025 struct btrfs_map_token
{
2026 struct extent_buffer
*eb
;
2028 unsigned long offset
;
2031 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
2033 token
->kaddr
= NULL
;
2036 /* some macros to generate set/get funcs for the struct fields. This
2037 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2040 #define le8_to_cpu(v) (v)
2041 #define cpu_to_le8(v) (v)
2044 #define read_eb_member(eb, ptr, type, member, result) ( \
2045 read_extent_buffer(eb, (char *)(result), \
2046 ((unsigned long)(ptr)) + \
2047 offsetof(type, member), \
2048 sizeof(((type *)0)->member)))
2050 #define write_eb_member(eb, ptr, type, member, result) ( \
2051 write_extent_buffer(eb, (char *)(result), \
2052 ((unsigned long)(ptr)) + \
2053 offsetof(type, member), \
2054 sizeof(((type *)0)->member)))
2056 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2057 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2058 unsigned long off, \
2059 struct btrfs_map_token *token); \
2060 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2061 unsigned long off, u##bits val, \
2062 struct btrfs_map_token *token); \
2063 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2064 unsigned long off) \
2066 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2068 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2069 unsigned long off, u##bits val) \
2071 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2074 DECLARE_BTRFS_SETGET_BITS(8)
2075 DECLARE_BTRFS_SETGET_BITS(16)
2076 DECLARE_BTRFS_SETGET_BITS(32)
2077 DECLARE_BTRFS_SETGET_BITS(64)
2079 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2080 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2082 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2083 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2085 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2088 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2089 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2091 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2092 struct btrfs_map_token *token) \
2094 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2095 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2097 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2098 type *s, u##bits val, \
2099 struct btrfs_map_token *token) \
2101 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2102 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2105 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2106 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2108 type *p = page_address(eb->pages[0]); \
2109 u##bits res = le##bits##_to_cpu(p->member); \
2112 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2115 type *p = page_address(eb->pages[0]); \
2116 p->member = cpu_to_le##bits(val); \
2119 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2120 static inline u##bits btrfs_##name(type *s) \
2122 return le##bits##_to_cpu(s->member); \
2124 static inline void btrfs_set_##name(type *s, u##bits val) \
2126 s->member = cpu_to_le##bits(val); \
2129 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2130 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2131 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2132 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2133 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2134 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2136 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2137 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2138 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2139 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2140 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2141 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2143 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2144 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2146 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2148 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2150 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2152 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2154 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2155 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2157 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2159 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2161 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2164 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
2166 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2169 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
2171 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2174 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2175 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2176 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2177 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2178 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2179 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2180 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2181 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2182 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2183 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2184 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2186 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2188 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2191 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2192 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2193 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2195 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2197 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2199 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2201 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2202 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2204 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2206 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2207 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2209 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2212 unsigned long offset
= (unsigned long)c
;
2213 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2214 offset
+= nr
* sizeof(struct btrfs_stripe
);
2215 return (struct btrfs_stripe
*)offset
;
2218 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2220 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2223 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2224 struct btrfs_chunk
*c
, int nr
)
2226 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2229 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2230 struct btrfs_chunk
*c
, int nr
)
2232 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2235 /* struct btrfs_block_group_item */
2236 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2238 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2240 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2241 struct btrfs_block_group_item
, chunk_objectid
, 64);
2243 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2244 struct btrfs_block_group_item
, chunk_objectid
, 64);
2245 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2246 struct btrfs_block_group_item
, flags
, 64);
2247 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2248 struct btrfs_block_group_item
, flags
, 64);
2250 /* struct btrfs_inode_ref */
2251 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2252 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2254 /* struct btrfs_inode_extref */
2255 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2256 parent_objectid
, 64);
2257 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2259 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2261 /* struct btrfs_inode_item */
2262 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2263 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2264 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2265 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2266 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2267 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2268 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2269 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2270 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2271 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2272 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2273 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2274 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
2276 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
2278 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
2280 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
2281 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
2283 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
2285 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2286 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
2287 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
2288 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
2289 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2290 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
2292 static inline struct btrfs_timespec
*
2293 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2295 unsigned long ptr
= (unsigned long)inode_item
;
2296 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2297 return (struct btrfs_timespec
*)ptr
;
2300 static inline struct btrfs_timespec
*
2301 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2303 unsigned long ptr
= (unsigned long)inode_item
;
2304 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2305 return (struct btrfs_timespec
*)ptr
;
2308 static inline struct btrfs_timespec
*
2309 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2311 unsigned long ptr
= (unsigned long)inode_item
;
2312 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2313 return (struct btrfs_timespec
*)ptr
;
2316 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2317 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2318 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
2319 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2321 /* struct btrfs_dev_extent */
2322 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2324 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2325 chunk_objectid
, 64);
2326 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2328 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2330 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2332 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2333 return (u8
*)((unsigned long)dev
+ ptr
);
2336 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2337 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2339 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2341 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2344 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2346 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2347 struct btrfs_tree_block_info
*item
,
2348 struct btrfs_disk_key
*key
)
2350 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2353 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2354 struct btrfs_tree_block_info
*item
,
2355 struct btrfs_disk_key
*key
)
2357 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2360 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2362 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2364 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2366 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2369 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2372 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2374 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2377 static inline u32
btrfs_extent_inline_ref_size(int type
)
2379 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2380 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2381 return sizeof(struct btrfs_extent_inline_ref
);
2382 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2383 return sizeof(struct btrfs_shared_data_ref
) +
2384 sizeof(struct btrfs_extent_inline_ref
);
2385 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2386 return sizeof(struct btrfs_extent_data_ref
) +
2387 offsetof(struct btrfs_extent_inline_ref
, offset
);
2392 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2393 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2395 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2396 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2398 /* struct btrfs_node */
2399 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2400 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2401 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
2403 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
2406 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2409 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2410 sizeof(struct btrfs_key_ptr
) * nr
;
2411 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2414 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2418 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2419 sizeof(struct btrfs_key_ptr
) * nr
;
2420 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2423 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2426 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2427 sizeof(struct btrfs_key_ptr
) * nr
;
2428 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2431 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2435 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2436 sizeof(struct btrfs_key_ptr
) * nr
;
2437 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2440 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2442 return offsetof(struct btrfs_node
, ptrs
) +
2443 sizeof(struct btrfs_key_ptr
) * nr
;
2446 void btrfs_node_key(struct extent_buffer
*eb
,
2447 struct btrfs_disk_key
*disk_key
, int nr
);
2449 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2450 struct btrfs_disk_key
*disk_key
, int nr
)
2453 ptr
= btrfs_node_key_ptr_offset(nr
);
2454 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2455 struct btrfs_key_ptr
, key
, disk_key
);
2458 /* struct btrfs_item */
2459 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2460 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2461 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
2462 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
2464 static inline unsigned long btrfs_item_nr_offset(int nr
)
2466 return offsetof(struct btrfs_leaf
, items
) +
2467 sizeof(struct btrfs_item
) * nr
;
2470 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
2473 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2476 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2477 struct btrfs_item
*item
)
2479 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2482 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2484 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
2487 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2489 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
2492 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2494 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
2497 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2498 struct btrfs_disk_key
*disk_key
, int nr
)
2500 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2501 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2504 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2505 struct btrfs_disk_key
*disk_key
, int nr
)
2507 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2508 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2511 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2514 * struct btrfs_root_ref
2516 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2517 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2518 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2520 /* struct btrfs_dir_item */
2521 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2522 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2523 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2524 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2525 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2526 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2528 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2530 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2533 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2534 struct btrfs_dir_item
*item
,
2535 struct btrfs_disk_key
*key
)
2537 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2540 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2541 struct btrfs_dir_item
*item
,
2542 struct btrfs_disk_key
*key
)
2544 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2547 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2549 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2551 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2554 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2555 struct btrfs_free_space_header
*h
,
2556 struct btrfs_disk_key
*key
)
2558 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2561 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2562 struct btrfs_free_space_header
*h
,
2563 struct btrfs_disk_key
*key
)
2565 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2568 /* struct btrfs_disk_key */
2569 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2571 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2572 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2574 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2575 struct btrfs_disk_key
*disk
)
2577 cpu
->offset
= le64_to_cpu(disk
->offset
);
2578 cpu
->type
= disk
->type
;
2579 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2582 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2583 struct btrfs_key
*cpu
)
2585 disk
->offset
= cpu_to_le64(cpu
->offset
);
2586 disk
->type
= cpu
->type
;
2587 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2590 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2591 struct btrfs_key
*key
, int nr
)
2593 struct btrfs_disk_key disk_key
;
2594 btrfs_node_key(eb
, &disk_key
, nr
);
2595 btrfs_disk_key_to_cpu(key
, &disk_key
);
2598 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2599 struct btrfs_key
*key
, int nr
)
2601 struct btrfs_disk_key disk_key
;
2602 btrfs_item_key(eb
, &disk_key
, nr
);
2603 btrfs_disk_key_to_cpu(key
, &disk_key
);
2606 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2607 struct btrfs_dir_item
*item
,
2608 struct btrfs_key
*key
)
2610 struct btrfs_disk_key disk_key
;
2611 btrfs_dir_item_key(eb
, item
, &disk_key
);
2612 btrfs_disk_key_to_cpu(key
, &disk_key
);
2616 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2621 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2626 /* struct btrfs_header */
2627 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2628 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2630 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2631 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2632 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2633 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2634 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2636 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2637 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2639 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2641 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2643 return (btrfs_header_flags(eb
) & flag
) == flag
;
2646 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2648 u64 flags
= btrfs_header_flags(eb
);
2649 btrfs_set_header_flags(eb
, flags
| flag
);
2650 return (flags
& flag
) == flag
;
2653 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2655 u64 flags
= btrfs_header_flags(eb
);
2656 btrfs_set_header_flags(eb
, flags
& ~flag
);
2657 return (flags
& flag
) == flag
;
2660 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2662 u64 flags
= btrfs_header_flags(eb
);
2663 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2666 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2669 u64 flags
= btrfs_header_flags(eb
);
2670 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2671 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2672 btrfs_set_header_flags(eb
, flags
);
2675 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2677 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2681 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2683 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2687 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2689 return btrfs_header_level(eb
) == 0;
2692 /* struct btrfs_root_item */
2693 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2695 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2696 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2697 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2699 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2701 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2702 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2703 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2704 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2705 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2706 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2707 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2708 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2710 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2712 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2714 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2716 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2718 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2721 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2723 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2726 /* struct btrfs_root_backup */
2727 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2729 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2731 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2732 tree_root_level
, 8);
2734 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2736 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2737 chunk_root_gen
, 64);
2738 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2739 chunk_root_level
, 8);
2741 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2743 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2744 extent_root_gen
, 64);
2745 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2746 extent_root_level
, 8);
2748 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2750 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2752 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2755 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2757 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2759 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2762 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2764 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2766 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2767 csum_root_level
, 8);
2768 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2770 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2772 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2775 /* struct btrfs_balance_item */
2776 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2778 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2779 struct btrfs_balance_item
*bi
,
2780 struct btrfs_disk_balance_args
*ba
)
2782 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2785 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2786 struct btrfs_balance_item
*bi
,
2787 struct btrfs_disk_balance_args
*ba
)
2789 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2792 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2793 struct btrfs_balance_item
*bi
,
2794 struct btrfs_disk_balance_args
*ba
)
2796 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2799 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2800 struct btrfs_balance_item
*bi
,
2801 struct btrfs_disk_balance_args
*ba
)
2803 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2806 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2807 struct btrfs_balance_item
*bi
,
2808 struct btrfs_disk_balance_args
*ba
)
2810 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2813 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2814 struct btrfs_balance_item
*bi
,
2815 struct btrfs_disk_balance_args
*ba
)
2817 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2821 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2822 struct btrfs_disk_balance_args
*disk
)
2824 memset(cpu
, 0, sizeof(*cpu
));
2826 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2827 cpu
->usage
= le64_to_cpu(disk
->usage
);
2828 cpu
->devid
= le64_to_cpu(disk
->devid
);
2829 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2830 cpu
->pend
= le64_to_cpu(disk
->pend
);
2831 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2832 cpu
->vend
= le64_to_cpu(disk
->vend
);
2833 cpu
->target
= le64_to_cpu(disk
->target
);
2834 cpu
->flags
= le64_to_cpu(disk
->flags
);
2838 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2839 struct btrfs_balance_args
*cpu
)
2841 memset(disk
, 0, sizeof(*disk
));
2843 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2844 disk
->usage
= cpu_to_le64(cpu
->usage
);
2845 disk
->devid
= cpu_to_le64(cpu
->devid
);
2846 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2847 disk
->pend
= cpu_to_le64(cpu
->pend
);
2848 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2849 disk
->vend
= cpu_to_le64(cpu
->vend
);
2850 disk
->target
= cpu_to_le64(cpu
->target
);
2851 disk
->flags
= cpu_to_le64(cpu
->flags
);
2854 /* struct btrfs_super_block */
2855 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2856 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2857 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2859 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2860 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2861 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2862 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2863 struct btrfs_super_block
, chunk_root_generation
, 64);
2864 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2866 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2868 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2869 chunk_root_level
, 8);
2870 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2872 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2873 log_root_transid
, 64);
2874 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2876 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2878 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2880 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2882 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2884 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2886 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2888 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2889 root_dir_objectid
, 64);
2890 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2892 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2894 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2895 compat_ro_flags
, 64);
2896 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2897 incompat_flags
, 64);
2898 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2900 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2901 cache_generation
, 64);
2902 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2904 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2906 u16 t
= btrfs_super_csum_type(s
);
2908 * csum type is validated at mount time
2910 return btrfs_csum_sizes
[t
];
2913 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2915 return offsetof(struct btrfs_leaf
, items
);
2918 /* struct btrfs_file_extent_item */
2919 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2920 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2921 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2922 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2923 struct btrfs_file_extent_item
, offset
, 64);
2924 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2925 struct btrfs_file_extent_item
, generation
, 64);
2926 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2927 struct btrfs_file_extent_item
, num_bytes
, 64);
2929 static inline unsigned long
2930 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2932 unsigned long offset
= (unsigned long)e
;
2933 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2937 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2939 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2942 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2944 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2946 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2947 disk_num_bytes
, 64);
2948 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2950 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2952 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2954 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2956 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2958 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2959 other_encoding
, 16);
2961 /* this returns the number of file bytes represented by the inline item.
2962 * If an item is compressed, this is the uncompressed size
2964 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2965 struct btrfs_file_extent_item
*e
)
2967 return btrfs_file_extent_ram_bytes(eb
, e
);
2971 * this returns the number of bytes used by the item on disk, minus the
2972 * size of any extent headers. If a file is compressed on disk, this is
2973 * the compressed size
2975 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2976 struct btrfs_item
*e
)
2978 unsigned long offset
;
2979 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2980 return btrfs_item_size(eb
, e
) - offset
;
2983 /* btrfs_dev_stats_item */
2984 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2985 struct btrfs_dev_stats_item
*ptr
,
2990 read_extent_buffer(eb
, &val
,
2991 offsetof(struct btrfs_dev_stats_item
, values
) +
2992 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2997 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2998 struct btrfs_dev_stats_item
*ptr
,
3001 write_extent_buffer(eb
, &val
,
3002 offsetof(struct btrfs_dev_stats_item
, values
) +
3003 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3007 /* btrfs_qgroup_status_item */
3008 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
3010 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
3012 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
3014 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
3017 /* btrfs_qgroup_info_item */
3018 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
3020 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
3021 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
3023 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
3024 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
3027 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
3028 struct btrfs_qgroup_info_item
, generation
, 64);
3029 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
3031 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
3032 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
3033 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
3035 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
3036 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
3038 /* btrfs_qgroup_limit_item */
3039 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
3041 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
3043 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
3045 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
3047 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
3050 /* btrfs_dev_replace_item */
3051 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
3052 struct btrfs_dev_replace_item
, src_devid
, 64);
3053 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
3054 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
3056 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
3058 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
3060 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
3062 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
3063 num_write_errors
, 64);
3064 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
3065 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
3067 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
3069 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
3072 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
3073 struct btrfs_dev_replace_item
, src_devid
, 64);
3074 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
3075 struct btrfs_dev_replace_item
,
3076 cont_reading_from_srcdev_mode
, 64);
3077 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
3078 struct btrfs_dev_replace_item
, replace_state
, 64);
3079 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
3080 struct btrfs_dev_replace_item
, time_started
, 64);
3081 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
3082 struct btrfs_dev_replace_item
, time_stopped
, 64);
3083 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
3084 struct btrfs_dev_replace_item
, num_write_errors
, 64);
3085 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
3086 struct btrfs_dev_replace_item
,
3087 num_uncorrectable_read_errors
, 64);
3088 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
3089 struct btrfs_dev_replace_item
, cursor_left
, 64);
3090 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
3091 struct btrfs_dev_replace_item
, cursor_right
, 64);
3093 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
3095 return sb
->s_fs_info
;
3098 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
3101 return root
->leafsize
;
3102 return root
->nodesize
;
3105 /* helper function to cast into the data area of the leaf. */
3106 #define btrfs_item_ptr(leaf, slot, type) \
3107 ((type *)(btrfs_leaf_data(leaf) + \
3108 btrfs_item_offset_nr(leaf, slot)))
3110 #define btrfs_item_ptr_offset(leaf, slot) \
3111 ((unsigned long)(btrfs_leaf_data(leaf) + \
3112 btrfs_item_offset_nr(leaf, slot)))
3114 static inline struct dentry
*fdentry(struct file
*file
)
3116 return file
->f_path
.dentry
;
3119 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
3121 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
3122 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
3125 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
3127 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
3131 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
3134 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3139 * Doing a truncate won't result in new nodes or leaves, just what we need for
3142 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3145 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3149 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
3150 struct btrfs_root
*root
);
3151 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3152 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3153 struct btrfs_root
*root
, unsigned long count
);
3154 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3155 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3156 struct btrfs_root
*root
, u64 bytenr
,
3157 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3158 int btrfs_pin_extent(struct btrfs_root
*root
,
3159 u64 bytenr
, u64 num
, int reserved
);
3160 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3161 u64 bytenr
, u64 num_bytes
);
3162 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
3163 struct extent_buffer
*eb
);
3164 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3165 struct btrfs_root
*root
,
3166 u64 objectid
, u64 offset
, u64 bytenr
);
3167 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3168 struct btrfs_fs_info
*info
,
3170 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3171 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
3172 struct btrfs_root
*root
, u32 blocksize
,
3173 u64 parent
, u64 root_objectid
,
3174 struct btrfs_disk_key
*key
, int level
,
3175 u64 hint
, u64 empty_size
);
3176 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3177 struct btrfs_root
*root
,
3178 struct extent_buffer
*buf
,
3179 u64 parent
, int last_ref
);
3180 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3181 struct btrfs_root
*root
,
3182 u64 root_objectid
, u64 owner
,
3183 u64 offset
, struct btrfs_key
*ins
);
3184 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3185 struct btrfs_root
*root
,
3186 u64 root_objectid
, u64 owner
, u64 offset
,
3187 struct btrfs_key
*ins
);
3188 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
3189 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
3190 struct btrfs_key
*ins
, int is_data
);
3191 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3192 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3193 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3194 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3195 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3196 struct btrfs_root
*root
,
3197 u64 bytenr
, u64 num_bytes
, u64 flags
,
3198 int level
, int is_data
);
3199 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3200 struct btrfs_root
*root
,
3201 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3202 u64 owner
, u64 offset
, int for_cow
);
3204 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3205 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3206 u64 start
, u64 len
);
3207 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3208 struct btrfs_root
*root
);
3209 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3210 struct btrfs_root
*root
);
3211 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3212 struct btrfs_root
*root
,
3213 u64 bytenr
, u64 num_bytes
, u64 parent
,
3214 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3216 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3217 struct btrfs_root
*root
);
3218 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3219 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3220 int btrfs_read_block_groups(struct btrfs_root
*root
);
3221 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3222 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3223 struct btrfs_root
*root
, u64 bytes_used
,
3224 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3226 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3227 struct btrfs_root
*root
, u64 group_start
);
3228 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3229 struct btrfs_root
*root
);
3230 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3231 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3233 enum btrfs_reserve_flush_enum
{
3234 /* If we are in the transaction, we can't flush anything.*/
3235 BTRFS_RESERVE_NO_FLUSH
,
3237 * Flushing delalloc may cause deadlock somewhere, in this
3238 * case, use FLUSH LIMIT
3240 BTRFS_RESERVE_FLUSH_LIMIT
,
3241 BTRFS_RESERVE_FLUSH_ALL
,
3244 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3245 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3246 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3247 struct btrfs_root
*root
);
3248 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3249 struct inode
*inode
);
3250 void btrfs_orphan_release_metadata(struct inode
*inode
);
3251 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3252 struct btrfs_block_rsv
*rsv
,
3254 u64
*qgroup_reserved
, bool use_global_rsv
);
3255 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3256 struct btrfs_block_rsv
*rsv
,
3257 u64 qgroup_reserved
);
3258 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3259 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3260 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3261 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3262 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3263 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3264 unsigned short type
);
3265 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3266 struct btrfs_block_rsv
*rsv
);
3267 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3268 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3269 enum btrfs_reserve_flush_enum flush
);
3270 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3271 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3272 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3273 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3274 enum btrfs_reserve_flush_enum flush
);
3275 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3276 struct btrfs_block_rsv
*dst_rsv
,
3278 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
3279 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
3281 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3282 struct btrfs_block_rsv
*block_rsv
,
3284 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3285 struct btrfs_block_group_cache
*cache
);
3286 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3287 struct btrfs_block_group_cache
*cache
);
3288 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3289 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3290 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3291 u64 start
, u64 end
);
3292 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3293 u64 num_bytes
, u64
*actual_bytes
);
3294 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3295 struct btrfs_root
*root
, u64 type
);
3296 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3298 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3299 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3300 struct btrfs_fs_info
*fs_info
);
3301 int __get_raid_index(u64 flags
);
3303 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3304 int level
, int *slot
);
3305 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3306 int btrfs_previous_item(struct btrfs_root
*root
,
3307 struct btrfs_path
*path
, u64 min_objectid
,
3309 void btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
3310 struct btrfs_key
*new_key
);
3311 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3312 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3313 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3314 struct btrfs_key
*key
, int lowest_level
,
3316 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3317 struct btrfs_key
*max_key
,
3318 struct btrfs_path
*path
,
3320 enum btrfs_compare_tree_result
{
3321 BTRFS_COMPARE_TREE_NEW
,
3322 BTRFS_COMPARE_TREE_DELETED
,
3323 BTRFS_COMPARE_TREE_CHANGED
,
3324 BTRFS_COMPARE_TREE_SAME
,
3326 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3327 struct btrfs_root
*right_root
,
3328 struct btrfs_path
*left_path
,
3329 struct btrfs_path
*right_path
,
3330 struct btrfs_key
*key
,
3331 enum btrfs_compare_tree_result result
,
3333 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3334 struct btrfs_root
*right_root
,
3335 btrfs_changed_cb_t cb
, void *ctx
);
3336 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3337 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3338 struct extent_buffer
*parent
, int parent_slot
,
3339 struct extent_buffer
**cow_ret
);
3340 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3341 struct btrfs_root
*root
,
3342 struct extent_buffer
*buf
,
3343 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3344 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3345 struct extent_buffer
*buf
);
3346 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3348 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3349 u32 new_size
, int from_end
);
3350 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3351 struct btrfs_root
*root
,
3352 struct btrfs_path
*path
,
3353 struct btrfs_key
*new_key
,
3354 unsigned long split_offset
);
3355 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3356 struct btrfs_root
*root
,
3357 struct btrfs_path
*path
,
3358 struct btrfs_key
*new_key
);
3359 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3360 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3362 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3363 struct btrfs_path
*p
, u64 time_seq
);
3364 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3365 struct btrfs_key
*key
, struct btrfs_path
*p
,
3366 int find_higher
, int return_any
);
3367 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3368 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3369 int start_slot
, u64
*last_ret
,
3370 struct btrfs_key
*progress
);
3371 void btrfs_release_path(struct btrfs_path
*p
);
3372 struct btrfs_path
*btrfs_alloc_path(void);
3373 void btrfs_free_path(struct btrfs_path
*p
);
3374 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3375 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3376 struct extent_buffer
*held
, int held_rw
);
3377 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3379 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3380 struct btrfs_path
*path
, int slot
, int nr
);
3381 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3382 struct btrfs_root
*root
,
3383 struct btrfs_path
*path
)
3385 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3388 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
3389 struct btrfs_key
*cpu_key
, u32
*data_size
,
3390 u32 total_data
, u32 total_size
, int nr
);
3391 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3392 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3393 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3394 struct btrfs_root
*root
,
3395 struct btrfs_path
*path
,
3396 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3398 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3399 struct btrfs_root
*root
,
3400 struct btrfs_path
*path
,
3401 struct btrfs_key
*key
,
3404 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3407 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3408 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3410 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3411 struct btrfs_path
*p
, u64 time_seq
)
3414 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3415 return btrfs_next_old_leaf(root
, p
, time_seq
);
3418 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3420 return btrfs_next_old_item(root
, p
, 0);
3422 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3423 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3424 struct btrfs_block_rsv
*block_rsv
,
3425 int update_ref
, int for_reloc
);
3426 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3427 struct btrfs_root
*root
,
3428 struct extent_buffer
*node
,
3429 struct extent_buffer
*parent
);
3430 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3433 * Get synced with close_ctree()
3436 return fs_info
->closing
;
3440 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3441 * anything except sleeping. This function is used to check the status of
3444 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
3446 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
3447 btrfs_fs_closing(root
->fs_info
));
3450 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3452 kfree(fs_info
->balance_ctl
);
3453 kfree(fs_info
->delayed_root
);
3454 kfree(fs_info
->extent_root
);
3455 kfree(fs_info
->tree_root
);
3456 kfree(fs_info
->chunk_root
);
3457 kfree(fs_info
->dev_root
);
3458 kfree(fs_info
->csum_root
);
3459 kfree(fs_info
->quota_root
);
3460 kfree(fs_info
->super_copy
);
3461 kfree(fs_info
->super_for_commit
);
3465 /* tree mod log functions from ctree.c */
3466 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3467 struct seq_list
*elem
);
3468 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3469 struct seq_list
*elem
);
3470 u64
btrfs_tree_mod_seq_prev(u64 seq
);
3471 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3474 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3475 struct btrfs_path
*path
,
3476 u64 root_id
, u64 ref_id
);
3477 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3478 struct btrfs_root
*tree_root
,
3479 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3480 const char *name
, int name_len
);
3481 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3482 struct btrfs_root
*tree_root
,
3483 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3484 const char *name
, int name_len
);
3485 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3486 struct btrfs_key
*key
);
3487 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3488 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3490 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3491 struct btrfs_root
*root
,
3492 struct btrfs_key
*key
,
3493 struct btrfs_root_item
*item
);
3494 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
3495 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3496 struct btrfs_key
*root_key
);
3497 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3498 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3499 struct extent_buffer
*node
);
3500 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3501 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3502 struct btrfs_root
*root
);
3505 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3506 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3508 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3509 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3513 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3514 const char *name
, int name_len
);
3515 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3516 struct btrfs_root
*root
, const char *name
,
3517 int name_len
, struct inode
*dir
,
3518 struct btrfs_key
*location
, u8 type
, u64 index
);
3519 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3520 struct btrfs_root
*root
,
3521 struct btrfs_path
*path
, u64 dir
,
3522 const char *name
, int name_len
,
3524 struct btrfs_dir_item
*
3525 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3526 struct btrfs_root
*root
,
3527 struct btrfs_path
*path
, u64 dir
,
3528 u64 objectid
, const char *name
, int name_len
,
3530 struct btrfs_dir_item
*
3531 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3532 struct btrfs_path
*path
, u64 dirid
,
3533 const char *name
, int name_len
);
3534 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3535 struct btrfs_root
*root
,
3536 struct btrfs_path
*path
,
3537 struct btrfs_dir_item
*di
);
3538 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3539 struct btrfs_root
*root
,
3540 struct btrfs_path
*path
, u64 objectid
,
3541 const char *name
, u16 name_len
,
3542 const void *data
, u16 data_len
);
3543 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3544 struct btrfs_root
*root
,
3545 struct btrfs_path
*path
, u64 dir
,
3546 const char *name
, u16 name_len
,
3548 int verify_dir_item(struct btrfs_root
*root
,
3549 struct extent_buffer
*leaf
,
3550 struct btrfs_dir_item
*dir_item
);
3553 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3554 struct btrfs_root
*root
, u64 offset
);
3555 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3556 struct btrfs_root
*root
, u64 offset
);
3557 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3560 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3561 struct btrfs_root
*root
,
3562 const char *name
, int name_len
,
3563 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3564 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3565 struct btrfs_root
*root
,
3566 const char *name
, int name_len
,
3567 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3568 int btrfs_get_inode_ref_index(struct btrfs_trans_handle
*trans
,
3569 struct btrfs_root
*root
,
3570 struct btrfs_path
*path
,
3571 const char *name
, int name_len
,
3572 u64 inode_objectid
, u64 ref_objectid
, int mod
,
3574 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3575 struct btrfs_root
*root
,
3576 struct btrfs_path
*path
, u64 objectid
);
3577 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3578 *root
, struct btrfs_path
*path
,
3579 struct btrfs_key
*location
, int mod
);
3581 struct btrfs_inode_extref
*
3582 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3583 struct btrfs_root
*root
,
3584 struct btrfs_path
*path
,
3585 const char *name
, int name_len
,
3586 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3589 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3590 u64 ref_objectid
, const char *name
,
3592 struct btrfs_inode_extref
**extref_ret
);
3595 struct btrfs_dio_private
;
3596 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3597 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3598 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3599 struct bio
*bio
, u32
*dst
);
3600 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3601 struct btrfs_dio_private
*dip
, struct bio
*bio
,
3602 u64 logical_offset
);
3603 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3604 struct btrfs_root
*root
,
3605 u64 objectid
, u64 pos
,
3606 u64 disk_offset
, u64 disk_num_bytes
,
3607 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3608 u8 compression
, u8 encryption
, u16 other_encoding
);
3609 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3610 struct btrfs_root
*root
,
3611 struct btrfs_path
*path
, u64 objectid
,
3612 u64 bytenr
, int mod
);
3613 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3614 struct btrfs_root
*root
,
3615 struct btrfs_ordered_sum
*sums
);
3616 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3617 struct bio
*bio
, u64 file_start
, int contig
);
3618 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
3619 struct btrfs_root
*root
, struct btrfs_path
*path
,
3621 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3622 struct list_head
*list
, int search_commit
);
3624 struct btrfs_delalloc_work
{
3625 struct inode
*inode
;
3628 struct completion completion
;
3629 struct list_head list
;
3630 struct btrfs_work work
;
3633 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3634 int wait
, int delay_iput
);
3635 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3637 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3638 size_t pg_offset
, u64 start
, u64 len
,
3640 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3641 u64
*orig_start
, u64
*orig_block_len
,
3644 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3645 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3646 #define ClearPageChecked ClearPageFsMisc
3647 #define SetPageChecked SetPageFsMisc
3648 #define PageChecked PageFsMisc
3651 /* This forces readahead on a given range of bytes in an inode */
3652 static inline void btrfs_force_ra(struct address_space
*mapping
,
3653 struct file_ra_state
*ra
, struct file
*file
,
3654 pgoff_t offset
, unsigned long req_size
)
3656 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3659 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3660 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3661 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3662 struct btrfs_root
*root
,
3663 struct inode
*dir
, struct inode
*inode
,
3664 const char *name
, int name_len
);
3665 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3666 struct inode
*parent_inode
, struct inode
*inode
,
3667 const char *name
, int name_len
, int add_backref
, u64 index
);
3668 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3669 struct btrfs_root
*root
,
3670 struct inode
*dir
, u64 objectid
,
3671 const char *name
, int name_len
);
3672 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3674 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3675 struct btrfs_root
*root
,
3676 struct inode
*inode
, u64 new_size
,
3679 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3680 int btrfs_start_all_delalloc_inodes(struct btrfs_fs_info
*fs_info
,
3682 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3683 struct extent_state
**cached_state
);
3684 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3685 struct btrfs_root
*new_root
, u64 new_dirid
);
3686 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3687 size_t size
, struct bio
*bio
,
3688 unsigned long bio_flags
);
3689 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3690 int btrfs_readpage(struct file
*file
, struct page
*page
);
3691 void btrfs_evict_inode(struct inode
*inode
);
3692 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3693 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3694 void btrfs_destroy_inode(struct inode
*inode
);
3695 int btrfs_drop_inode(struct inode
*inode
);
3696 int btrfs_init_cachep(void);
3697 void btrfs_destroy_cachep(void);
3698 long btrfs_ioctl_trans_end(struct file
*file
);
3699 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3700 struct btrfs_root
*root
, int *was_new
);
3701 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3702 size_t pg_offset
, u64 start
, u64 end
,
3704 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3705 struct btrfs_root
*root
,
3706 struct inode
*inode
);
3707 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3708 struct btrfs_root
*root
, struct inode
*inode
);
3709 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3710 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3711 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3712 struct btrfs_root
*root
);
3713 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3714 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3715 void btrfs_add_delayed_iput(struct inode
*inode
);
3716 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3717 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3718 u64 start
, u64 num_bytes
, u64 min_size
,
3719 loff_t actual_len
, u64
*alloc_hint
);
3720 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3721 struct btrfs_trans_handle
*trans
, int mode
,
3722 u64 start
, u64 num_bytes
, u64 min_size
,
3723 loff_t actual_len
, u64
*alloc_hint
);
3724 extern const struct dentry_operations btrfs_dentry_operations
;
3727 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3728 void btrfs_update_iflags(struct inode
*inode
);
3729 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3730 int btrfs_is_empty_uuid(u8
*uuid
);
3731 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3732 struct btrfs_ioctl_defrag_range_args
*range
,
3733 u64 newer_than
, unsigned long max_pages
);
3734 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3735 struct btrfs_ioctl_space_info
*space
);
3736 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3737 struct btrfs_ioctl_balance_args
*bargs
);
3741 int btrfs_auto_defrag_init(void);
3742 void btrfs_auto_defrag_exit(void);
3743 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3744 struct inode
*inode
);
3745 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3746 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3747 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3748 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3750 int btrfs_replace_extent_cache(struct inode
*inode
, struct extent_map
*replace
,
3751 u64 start
, u64 end
, int skip_pinned
,
3753 extern const struct file_operations btrfs_file_operations
;
3754 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3755 struct btrfs_root
*root
, struct inode
*inode
,
3756 struct btrfs_path
*path
, u64 start
, u64 end
,
3757 u64
*drop_end
, int drop_cache
);
3758 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3759 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3760 u64 end
, int drop_cache
);
3761 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3762 struct inode
*inode
, u64 start
, u64 end
);
3763 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3764 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3765 struct page
**pages
, size_t num_pages
,
3766 loff_t pos
, size_t write_bytes
,
3767 struct extent_state
**cached
);
3770 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3771 struct btrfs_root
*root
);
3774 int btrfs_init_sysfs(void);
3775 void btrfs_exit_sysfs(void);
3778 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3781 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3782 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3784 #ifdef CONFIG_PRINTK
3786 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3788 static inline __printf(2, 3)
3789 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3794 #define btrfs_emerg(fs_info, fmt, args...) \
3795 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3796 #define btrfs_alert(fs_info, fmt, args...) \
3797 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3798 #define btrfs_crit(fs_info, fmt, args...) \
3799 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3800 #define btrfs_err(fs_info, fmt, args...) \
3801 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3802 #define btrfs_warn(fs_info, fmt, args...) \
3803 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3804 #define btrfs_notice(fs_info, fmt, args...) \
3805 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3806 #define btrfs_info(fs_info, fmt, args...) \
3807 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3808 #define btrfs_debug(fs_info, fmt, args...) \
3809 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3812 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3813 unsigned int line
, int errno
, const char *fmt
, ...);
3816 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3817 struct btrfs_root
*root
, const char *function
,
3818 unsigned int line
, int errno
);
3820 #define btrfs_set_fs_incompat(__fs_info, opt) \
3821 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3823 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3826 struct btrfs_super_block
*disk_super
;
3829 disk_super
= fs_info
->super_copy
;
3830 features
= btrfs_super_incompat_flags(disk_super
);
3831 if (!(features
& flag
)) {
3832 spin_lock(&fs_info
->super_lock
);
3833 features
= btrfs_super_incompat_flags(disk_super
);
3834 if (!(features
& flag
)) {
3836 btrfs_set_super_incompat_flags(disk_super
, features
);
3837 printk(KERN_INFO
"btrfs: setting %llu feature flag\n",
3840 spin_unlock(&fs_info
->super_lock
);
3844 #define btrfs_fs_incompat(fs_info, opt) \
3845 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3847 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3849 struct btrfs_super_block
*disk_super
;
3850 disk_super
= fs_info
->super_copy
;
3851 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3855 * Call btrfs_abort_transaction as early as possible when an error condition is
3856 * detected, that way the exact line number is reported.
3859 #define btrfs_abort_transaction(trans, root, errno) \
3861 __btrfs_abort_transaction(trans, root, __func__, \
3865 #define btrfs_std_error(fs_info, errno) \
3868 __btrfs_std_error((fs_info), __func__, \
3869 __LINE__, (errno), NULL); \
3872 #define btrfs_error(fs_info, errno, fmt, args...) \
3874 __btrfs_std_error((fs_info), __func__, __LINE__, \
3875 (errno), fmt, ##args); \
3879 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3880 unsigned int line
, int errno
, const char *fmt
, ...);
3883 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3884 * will panic(). Otherwise we BUG() here.
3886 #define btrfs_panic(fs_info, errno, fmt, args...) \
3888 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3893 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3894 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3895 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3896 struct inode
*inode
, struct inode
*dir
);
3897 int btrfs_acl_chmod(struct inode
*inode
);
3899 #define btrfs_get_acl NULL
3900 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3901 struct inode
*inode
, struct inode
*dir
)
3905 static inline int btrfs_acl_chmod(struct inode
*inode
)
3912 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3913 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3914 struct btrfs_root
*root
);
3915 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3916 struct btrfs_root
*root
);
3917 int btrfs_recover_relocation(struct btrfs_root
*root
);
3918 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3919 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3920 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3921 struct extent_buffer
*cow
);
3922 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3923 struct btrfs_pending_snapshot
*pending
,
3924 u64
*bytes_to_reserve
);
3925 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3926 struct btrfs_pending_snapshot
*pending
);
3929 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3930 u64 end
, struct btrfs_scrub_progress
*progress
,
3931 int readonly
, int is_dev_replace
);
3932 void btrfs_scrub_pause(struct btrfs_root
*root
);
3933 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3934 void btrfs_scrub_continue(struct btrfs_root
*root
);
3935 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3936 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3937 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3938 struct btrfs_device
*dev
);
3939 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3940 struct btrfs_scrub_progress
*progress
);
3943 struct reada_control
{
3944 struct btrfs_root
*root
; /* tree to prefetch */
3945 struct btrfs_key key_start
;
3946 struct btrfs_key key_end
; /* exclusive */
3949 wait_queue_head_t wait
;
3951 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3952 struct btrfs_key
*start
, struct btrfs_key
*end
);
3953 int btrfs_reada_wait(void *handle
);
3954 void btrfs_reada_detach(void *handle
);
3955 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3956 u64 start
, int err
);
3959 struct qgroup_update
{
3960 struct list_head list
;
3961 struct btrfs_delayed_ref_node
*node
;
3962 struct btrfs_delayed_extent_op
*extent_op
;
3965 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
3966 struct btrfs_fs_info
*fs_info
);
3967 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
3968 struct btrfs_fs_info
*fs_info
);
3969 int btrfs_qgroup_rescan(struct btrfs_fs_info
*fs_info
);
3970 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info
*fs_info
);
3971 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info
*fs_info
);
3972 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
3973 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3974 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
3975 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3976 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
3977 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3979 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
3980 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
3981 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
3982 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3983 struct btrfs_qgroup_limit
*limit
);
3984 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
3985 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
3986 struct btrfs_delayed_extent_op
;
3987 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
3988 struct btrfs_delayed_ref_node
*node
,
3989 struct btrfs_delayed_extent_op
*extent_op
);
3990 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
3991 struct btrfs_fs_info
*fs_info
,
3992 struct btrfs_delayed_ref_node
*node
,
3993 struct btrfs_delayed_extent_op
*extent_op
);
3994 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
3995 struct btrfs_fs_info
*fs_info
);
3996 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
3997 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
3998 struct btrfs_qgroup_inherit
*inherit
);
3999 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
4000 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
4002 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
4004 static inline int is_fstree(u64 rootid
)
4006 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
4007 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)
4012 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
4014 return signal_pending(current
);