2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 2
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* orhpan objectid for tracking unlinked/truncated files */
95 #define BTRFS_ORPHAN_OBJECTID -5ULL
97 /* does write ahead logging to speed up fsyncs */
98 #define BTRFS_TREE_LOG_OBJECTID -6ULL
99 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
101 /* for space balancing */
102 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
103 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
106 * extent checksums all have this objectid
107 * this allows them to share the logging tree
110 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
112 /* For storing free space cache */
113 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
116 * The inode number assigned to the special inode for sotring
119 #define BTRFS_FREE_INO_OBJECTID -12ULL
121 /* dummy objectid represents multiple objectids */
122 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
125 * All files have objectids in this range.
127 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
128 #define BTRFS_LAST_FREE_OBJECTID -256ULL
129 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
133 * the device items go into the chunk tree. The key is in the form
134 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
136 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
138 #define BTRFS_BTREE_INODE_OBJECTID 1
140 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
143 * the max metadata block size. This limit is somewhat artificial,
144 * but the memmove costs go through the roof for larger blocks.
146 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
149 * we can actually store much bigger names, but lets not confuse the rest
152 #define BTRFS_NAME_LEN 255
154 /* 32 bytes in various csum fields */
155 #define BTRFS_CSUM_SIZE 32
158 #define BTRFS_CSUM_TYPE_CRC32 0
160 static int btrfs_csum_sizes
[] = { 4, 0 };
162 /* four bytes for CRC32 */
163 #define BTRFS_EMPTY_DIR_SIZE 0
165 #define BTRFS_FT_UNKNOWN 0
166 #define BTRFS_FT_REG_FILE 1
167 #define BTRFS_FT_DIR 2
168 #define BTRFS_FT_CHRDEV 3
169 #define BTRFS_FT_BLKDEV 4
170 #define BTRFS_FT_FIFO 5
171 #define BTRFS_FT_SOCK 6
172 #define BTRFS_FT_SYMLINK 7
173 #define BTRFS_FT_XATTR 8
174 #define BTRFS_FT_MAX 9
177 * The key defines the order in the tree, and so it also defines (optimal)
180 * objectid corresponds to the inode number.
182 * type tells us things about the object, and is a kind of stream selector.
183 * so for a given inode, keys with type of 1 might refer to the inode data,
184 * type of 2 may point to file data in the btree and type == 3 may point to
187 * offset is the starting byte offset for this key in the stream.
189 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
190 * in cpu native order. Otherwise they are identical and their sizes
191 * should be the same (ie both packed)
193 struct btrfs_disk_key
{
197 } __attribute__ ((__packed__
));
203 } __attribute__ ((__packed__
));
205 struct btrfs_mapping_tree
{
206 struct extent_map_tree map_tree
;
209 struct btrfs_dev_item
{
210 /* the internal btrfs device id */
213 /* size of the device */
219 /* optimal io alignment for this device */
222 /* optimal io width for this device */
225 /* minimal io size for this device */
228 /* type and info about this device */
231 /* expected generation for this device */
235 * starting byte of this partition on the device,
236 * to allow for stripe alignment in the future
240 /* grouping information for allocation decisions */
243 /* seek speed 0-100 where 100 is fastest */
246 /* bandwidth 0-100 where 100 is fastest */
249 /* btrfs generated uuid for this device */
250 u8 uuid
[BTRFS_UUID_SIZE
];
252 /* uuid of FS who owns this device */
253 u8 fsid
[BTRFS_UUID_SIZE
];
254 } __attribute__ ((__packed__
));
256 struct btrfs_stripe
{
259 u8 dev_uuid
[BTRFS_UUID_SIZE
];
260 } __attribute__ ((__packed__
));
263 /* size of this chunk in bytes */
266 /* objectid of the root referencing this chunk */
272 /* optimal io alignment for this chunk */
275 /* optimal io width for this chunk */
278 /* minimal io size for this chunk */
281 /* 2^16 stripes is quite a lot, a second limit is the size of a single
286 /* sub stripes only matter for raid10 */
288 struct btrfs_stripe stripe
;
289 /* additional stripes go here */
290 } __attribute__ ((__packed__
));
292 #define BTRFS_FREE_SPACE_EXTENT 1
293 #define BTRFS_FREE_SPACE_BITMAP 2
295 struct btrfs_free_space_entry
{
299 } __attribute__ ((__packed__
));
301 struct btrfs_free_space_header
{
302 struct btrfs_disk_key location
;
306 } __attribute__ ((__packed__
));
308 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
310 BUG_ON(num_stripes
== 0);
311 return sizeof(struct btrfs_chunk
) +
312 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
315 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
316 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
322 /* Errors detected */
323 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
325 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
326 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
328 #define BTRFS_BACKREF_REV_MAX 256
329 #define BTRFS_BACKREF_REV_SHIFT 56
330 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
331 BTRFS_BACKREF_REV_SHIFT)
333 #define BTRFS_OLD_BACKREF_REV 0
334 #define BTRFS_MIXED_BACKREF_REV 1
337 * every tree block (leaf or node) starts with this header.
339 struct btrfs_header
{
340 /* these first four must match the super block */
341 u8 csum
[BTRFS_CSUM_SIZE
];
342 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
343 __le64 bytenr
; /* which block this node is supposed to live in */
346 /* allowed to be different from the super from here on down */
347 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
352 } __attribute__ ((__packed__
));
354 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
355 sizeof(struct btrfs_header)) / \
356 sizeof(struct btrfs_key_ptr))
357 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
358 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
359 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
360 sizeof(struct btrfs_item) - \
361 sizeof(struct btrfs_file_extent_item))
362 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
363 sizeof(struct btrfs_item) -\
364 sizeof(struct btrfs_dir_item))
368 * this is a very generous portion of the super block, giving us
369 * room to translate 14 chunks with 3 stripes each.
371 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
372 #define BTRFS_LABEL_SIZE 256
375 * just in case we somehow lose the roots and are not able to mount,
376 * we store an array of the roots from previous transactions
379 #define BTRFS_NUM_BACKUP_ROOTS 4
380 struct btrfs_root_backup
{
382 __le64 tree_root_gen
;
385 __le64 chunk_root_gen
;
388 __le64 extent_root_gen
;
397 __le64 csum_root_gen
;
407 u8 extent_root_level
;
411 /* future and to align */
413 } __attribute__ ((__packed__
));
416 * the super block basically lists the main trees of the FS
417 * it currently lacks any block count etc etc
419 struct btrfs_super_block
{
420 u8 csum
[BTRFS_CSUM_SIZE
];
421 /* the first 4 fields must match struct btrfs_header */
422 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
423 __le64 bytenr
; /* this block number */
426 /* allowed to be different from the btrfs_header from here own down */
433 /* this will help find the new super based on the log root */
434 __le64 log_root_transid
;
437 __le64 root_dir_objectid
;
443 __le32 sys_chunk_array_size
;
444 __le64 chunk_root_generation
;
446 __le64 compat_ro_flags
;
447 __le64 incompat_flags
;
452 struct btrfs_dev_item dev_item
;
454 char label
[BTRFS_LABEL_SIZE
];
456 __le64 cache_generation
;
458 /* future expansion */
460 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
461 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
462 } __attribute__ ((__packed__
));
465 * Compat flags that we support. If any incompat flags are set other than the
466 * ones specified below then we will fail to mount
468 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
469 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
470 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
471 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
473 * some patches floated around with a second compression method
474 * lets save that incompat here for when they do get in
475 * Note we don't actually support it, we're just reserving the
478 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
481 * older kernels tried to do bigger metadata blocks, but the
482 * code was pretty buggy. Lets not let them try anymore.
484 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
486 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
487 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
488 #define BTRFS_FEATURE_INCOMPAT_SUPP \
489 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
490 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
491 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
492 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
493 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
496 * A leaf is full of items. offset and size tell us where to find
497 * the item in the leaf (relative to the start of the data area)
500 struct btrfs_disk_key key
;
503 } __attribute__ ((__packed__
));
506 * leaves have an item area and a data area:
507 * [item0, item1....itemN] [free space] [dataN...data1, data0]
509 * The data is separate from the items to get the keys closer together
513 struct btrfs_header header
;
514 struct btrfs_item items
[];
515 } __attribute__ ((__packed__
));
518 * all non-leaf blocks are nodes, they hold only keys and pointers to
521 struct btrfs_key_ptr
{
522 struct btrfs_disk_key key
;
525 } __attribute__ ((__packed__
));
528 struct btrfs_header header
;
529 struct btrfs_key_ptr ptrs
[];
530 } __attribute__ ((__packed__
));
533 * btrfs_paths remember the path taken from the root down to the leaf.
534 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
535 * to any other levels that are present.
537 * The slots array records the index of the item or block pointer
538 * used while walking the tree.
541 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
542 int slots
[BTRFS_MAX_LEVEL
];
543 /* if there is real range locking, this locks field will change */
544 int locks
[BTRFS_MAX_LEVEL
];
546 /* keep some upper locks as we walk down */
550 * set by btrfs_split_item, tells search_slot to keep all locks
551 * and to force calls to keep space in the nodes
553 unsigned int search_for_split
:1;
554 unsigned int keep_locks
:1;
555 unsigned int skip_locking
:1;
556 unsigned int leave_spinning
:1;
557 unsigned int search_commit_root
:1;
561 * items in the extent btree are used to record the objectid of the
562 * owner of the block and the number of references
565 struct btrfs_extent_item
{
569 } __attribute__ ((__packed__
));
571 struct btrfs_extent_item_v0
{
573 } __attribute__ ((__packed__
));
575 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
576 sizeof(struct btrfs_item))
578 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
579 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
581 /* following flags only apply to tree blocks */
583 /* use full backrefs for extent pointers in the block */
584 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
587 * this flag is only used internally by scrub and may be changed at any time
588 * it is only declared here to avoid collisions
590 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
592 struct btrfs_tree_block_info
{
593 struct btrfs_disk_key key
;
595 } __attribute__ ((__packed__
));
597 struct btrfs_extent_data_ref
{
602 } __attribute__ ((__packed__
));
604 struct btrfs_shared_data_ref
{
606 } __attribute__ ((__packed__
));
608 struct btrfs_extent_inline_ref
{
611 } __attribute__ ((__packed__
));
613 /* old style backrefs item */
614 struct btrfs_extent_ref_v0
{
619 } __attribute__ ((__packed__
));
622 /* dev extents record free space on individual devices. The owner
623 * field points back to the chunk allocation mapping tree that allocated
624 * the extent. The chunk tree uuid field is a way to double check the owner
626 struct btrfs_dev_extent
{
628 __le64 chunk_objectid
;
631 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
632 } __attribute__ ((__packed__
));
634 struct btrfs_inode_ref
{
638 } __attribute__ ((__packed__
));
640 struct btrfs_timespec
{
643 } __attribute__ ((__packed__
));
645 enum btrfs_compression_type
{
646 BTRFS_COMPRESS_NONE
= 0,
647 BTRFS_COMPRESS_ZLIB
= 1,
648 BTRFS_COMPRESS_LZO
= 2,
649 BTRFS_COMPRESS_TYPES
= 2,
650 BTRFS_COMPRESS_LAST
= 3,
653 struct btrfs_inode_item
{
654 /* nfs style generation number */
656 /* transid that last touched this inode */
668 /* modification sequence number for NFS */
672 * a little future expansion, for more than this we can
673 * just grow the inode item and version it
676 struct btrfs_timespec atime
;
677 struct btrfs_timespec ctime
;
678 struct btrfs_timespec mtime
;
679 struct btrfs_timespec otime
;
680 } __attribute__ ((__packed__
));
682 struct btrfs_dir_log_item
{
684 } __attribute__ ((__packed__
));
686 struct btrfs_dir_item
{
687 struct btrfs_disk_key location
;
692 } __attribute__ ((__packed__
));
694 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
696 struct btrfs_root_item
{
697 struct btrfs_inode_item inode
;
703 __le64 last_snapshot
;
706 struct btrfs_disk_key drop_progress
;
709 } __attribute__ ((__packed__
));
712 * this is used for both forward and backward root refs
714 struct btrfs_root_ref
{
718 } __attribute__ ((__packed__
));
720 struct btrfs_disk_balance_args
{
722 * profiles to operate on, single is denoted by
723 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
733 /* devid subset filter [pstart..pend) */
737 /* btrfs virtual address space subset filter [vstart..vend) */
742 * profile to convert to, single is denoted by
743 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
747 /* BTRFS_BALANCE_ARGS_* */
751 } __attribute__ ((__packed__
));
754 * store balance parameters to disk so that balance can be properly
755 * resumed after crash or unmount
757 struct btrfs_balance_item
{
758 /* BTRFS_BALANCE_* */
761 struct btrfs_disk_balance_args data
;
762 struct btrfs_disk_balance_args meta
;
763 struct btrfs_disk_balance_args sys
;
766 } __attribute__ ((__packed__
));
768 #define BTRFS_FILE_EXTENT_INLINE 0
769 #define BTRFS_FILE_EXTENT_REG 1
770 #define BTRFS_FILE_EXTENT_PREALLOC 2
772 struct btrfs_file_extent_item
{
774 * transaction id that created this extent
778 * max number of bytes to hold this extent in ram
779 * when we split a compressed extent we can't know how big
780 * each of the resulting pieces will be. So, this is
781 * an upper limit on the size of the extent in ram instead of
787 * 32 bits for the various ways we might encode the data,
788 * including compression and encryption. If any of these
789 * are set to something a given disk format doesn't understand
790 * it is treated like an incompat flag for reading and writing,
795 __le16 other_encoding
; /* spare for later use */
797 /* are we inline data or a real extent? */
801 * disk space consumed by the extent, checksum blocks are included
805 __le64 disk_num_bytes
;
807 * the logical offset in file blocks (no csums)
808 * this extent record is for. This allows a file extent to point
809 * into the middle of an existing extent on disk, sharing it
810 * between two snapshots (useful if some bytes in the middle of the
811 * extent have changed
815 * the logical number of file blocks (no csums included). This
816 * always reflects the size uncompressed and without encoding.
820 } __attribute__ ((__packed__
));
822 struct btrfs_csum_item
{
824 } __attribute__ ((__packed__
));
826 /* different types of block groups (and chunks) */
827 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
828 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
829 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
830 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
831 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
832 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
833 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
834 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
835 #define BTRFS_NR_RAID_TYPES 5
837 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
838 BTRFS_BLOCK_GROUP_SYSTEM | \
839 BTRFS_BLOCK_GROUP_METADATA)
841 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
842 BTRFS_BLOCK_GROUP_RAID1 | \
843 BTRFS_BLOCK_GROUP_DUP | \
844 BTRFS_BLOCK_GROUP_RAID10)
846 * We need a bit for restriper to be able to tell when chunks of type
847 * SINGLE are available. This "extended" profile format is used in
848 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
849 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
850 * to avoid remappings between two formats in future.
852 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
854 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
855 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
857 static inline u64
chunk_to_extended(u64 flags
)
859 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
860 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
864 static inline u64
extended_to_chunk(u64 flags
)
866 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
869 struct btrfs_block_group_item
{
871 __le64 chunk_objectid
;
873 } __attribute__ ((__packed__
));
875 struct btrfs_space_info
{
878 u64 total_bytes
; /* total bytes in the space,
879 this doesn't take mirrors into account */
880 u64 bytes_used
; /* total bytes used,
881 this doesn't take mirrors into account */
882 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
883 transaction finishes */
884 u64 bytes_reserved
; /* total bytes the allocator has reserved for
885 current allocations */
886 u64 bytes_readonly
; /* total bytes that are read only */
888 u64 bytes_may_use
; /* number of bytes that may be used for
889 delalloc/allocations */
890 u64 disk_used
; /* total bytes used on disk */
891 u64 disk_total
; /* total bytes on disk, takes mirrors into
895 * we bump reservation progress every time we decrement
896 * bytes_reserved. This way people waiting for reservations
897 * know something good has happened and they can check
898 * for progress. The number here isn't to be trusted, it
899 * just shows reclaim activity
901 unsigned long reservation_progress
;
903 unsigned int full
:1; /* indicates that we cannot allocate any more
904 chunks for this space */
905 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
907 unsigned int flush
:1; /* set if we are trying to make space */
909 unsigned int force_alloc
; /* set if we need to force a chunk
910 alloc for this space */
912 struct list_head list
;
914 /* for block groups in our same type */
915 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
917 struct rw_semaphore groups_sem
;
918 wait_queue_head_t wait
;
921 struct btrfs_block_rsv
{
924 struct btrfs_space_info
*space_info
;
930 * free clusters are used to claim free space in relatively large chunks,
931 * allowing us to do less seeky writes. They are used for all metadata
932 * allocations and data allocations in ssd mode.
934 struct btrfs_free_cluster
{
936 spinlock_t refill_lock
;
939 /* largest extent in this cluster */
942 /* first extent starting offset */
945 struct btrfs_block_group_cache
*block_group
;
947 * when a cluster is allocated from a block group, we put the
948 * cluster onto a list in the block group so that it can
949 * be freed before the block group is freed.
951 struct list_head block_group_list
;
954 enum btrfs_caching_type
{
956 BTRFS_CACHE_STARTED
= 1,
957 BTRFS_CACHE_FAST
= 2,
958 BTRFS_CACHE_FINISHED
= 3,
961 enum btrfs_disk_cache_state
{
962 BTRFS_DC_WRITTEN
= 0,
966 BTRFS_DC_NEED_WRITE
= 4,
969 struct btrfs_caching_control
{
970 struct list_head list
;
972 wait_queue_head_t wait
;
973 struct btrfs_work work
;
974 struct btrfs_block_group_cache
*block_group
;
979 struct btrfs_block_group_cache
{
980 struct btrfs_key key
;
981 struct btrfs_block_group_item item
;
982 struct btrfs_fs_info
*fs_info
;
990 u64 cache_generation
;
992 unsigned int dirty
:1;
995 int disk_cache_state
;
997 /* cache tracking stuff */
999 struct btrfs_caching_control
*caching_ctl
;
1000 u64 last_byte_to_unpin
;
1002 struct btrfs_space_info
*space_info
;
1004 /* free space cache stuff */
1005 struct btrfs_free_space_ctl
*free_space_ctl
;
1007 /* block group cache stuff */
1008 struct rb_node cache_node
;
1010 /* for block groups in the same raid type */
1011 struct list_head list
;
1016 /* List of struct btrfs_free_clusters for this block group.
1017 * Today it will only have one thing on it, but that may change
1019 struct list_head cluster_list
;
1022 struct reloc_control
;
1023 struct btrfs_device
;
1024 struct btrfs_fs_devices
;
1025 struct btrfs_balance_control
;
1026 struct btrfs_delayed_root
;
1027 struct btrfs_fs_info
{
1028 u8 fsid
[BTRFS_FSID_SIZE
];
1029 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1030 struct btrfs_root
*extent_root
;
1031 struct btrfs_root
*tree_root
;
1032 struct btrfs_root
*chunk_root
;
1033 struct btrfs_root
*dev_root
;
1034 struct btrfs_root
*fs_root
;
1035 struct btrfs_root
*csum_root
;
1037 /* the log root tree is a directory of all the other log roots */
1038 struct btrfs_root
*log_root_tree
;
1040 spinlock_t fs_roots_radix_lock
;
1041 struct radix_tree_root fs_roots_radix
;
1043 /* block group cache stuff */
1044 spinlock_t block_group_cache_lock
;
1045 struct rb_root block_group_cache_tree
;
1047 /* keep track of unallocated space */
1048 spinlock_t free_chunk_lock
;
1049 u64 free_chunk_space
;
1051 struct extent_io_tree freed_extents
[2];
1052 struct extent_io_tree
*pinned_extents
;
1054 /* logical->physical extent mapping */
1055 struct btrfs_mapping_tree mapping_tree
;
1058 * block reservation for extent, checksum, root tree and
1059 * delayed dir index item
1061 struct btrfs_block_rsv global_block_rsv
;
1062 /* block reservation for delay allocation */
1063 struct btrfs_block_rsv delalloc_block_rsv
;
1064 /* block reservation for metadata operations */
1065 struct btrfs_block_rsv trans_block_rsv
;
1066 /* block reservation for chunk tree */
1067 struct btrfs_block_rsv chunk_block_rsv
;
1068 /* block reservation for delayed operations */
1069 struct btrfs_block_rsv delayed_block_rsv
;
1071 struct btrfs_block_rsv empty_block_rsv
;
1074 u64 last_trans_committed
;
1077 * this is updated to the current trans every time a full commit
1078 * is required instead of the faster short fsync log commits
1080 u64 last_trans_log_full_commit
;
1081 unsigned long mount_opt
;
1082 unsigned long compress_type
:4;
1085 struct btrfs_transaction
*running_transaction
;
1086 wait_queue_head_t transaction_throttle
;
1087 wait_queue_head_t transaction_wait
;
1088 wait_queue_head_t transaction_blocked_wait
;
1089 wait_queue_head_t async_submit_wait
;
1091 struct btrfs_super_block
*super_copy
;
1092 struct btrfs_super_block
*super_for_commit
;
1093 struct block_device
*__bdev
;
1094 struct super_block
*sb
;
1095 struct inode
*btree_inode
;
1096 struct backing_dev_info bdi
;
1097 struct mutex tree_log_mutex
;
1098 struct mutex transaction_kthread_mutex
;
1099 struct mutex cleaner_mutex
;
1100 struct mutex chunk_mutex
;
1101 struct mutex volume_mutex
;
1103 * this protects the ordered operations list only while we are
1104 * processing all of the entries on it. This way we make
1105 * sure the commit code doesn't find the list temporarily empty
1106 * because another function happens to be doing non-waiting preflush
1107 * before jumping into the main commit.
1109 struct mutex ordered_operations_mutex
;
1110 struct rw_semaphore extent_commit_sem
;
1112 struct rw_semaphore cleanup_work_sem
;
1114 struct rw_semaphore subvol_sem
;
1115 struct srcu_struct subvol_srcu
;
1117 spinlock_t trans_lock
;
1119 * the reloc mutex goes with the trans lock, it is taken
1120 * during commit to protect us from the relocation code
1122 struct mutex reloc_mutex
;
1124 struct list_head trans_list
;
1125 struct list_head hashers
;
1126 struct list_head dead_roots
;
1127 struct list_head caching_block_groups
;
1129 spinlock_t delayed_iput_lock
;
1130 struct list_head delayed_iputs
;
1132 /* this protects tree_mod_seq_list */
1133 spinlock_t tree_mod_seq_lock
;
1134 atomic_t tree_mod_seq
;
1135 struct list_head tree_mod_seq_list
;
1137 /* this protects tree_mod_log */
1138 rwlock_t tree_mod_log_lock
;
1139 struct rb_root tree_mod_log
;
1141 atomic_t nr_async_submits
;
1142 atomic_t async_submit_draining
;
1143 atomic_t nr_async_bios
;
1144 atomic_t async_delalloc_pages
;
1145 atomic_t open_ioctl_trans
;
1148 * this is used by the balancing code to wait for all the pending
1151 spinlock_t ordered_extent_lock
;
1154 * all of the data=ordered extents pending writeback
1155 * these can span multiple transactions and basically include
1156 * every dirty data page that isn't from nodatacow
1158 struct list_head ordered_extents
;
1161 * all of the inodes that have delalloc bytes. It is possible for
1162 * this list to be empty even when there is still dirty data=ordered
1163 * extents waiting to finish IO.
1165 struct list_head delalloc_inodes
;
1168 * special rename and truncate targets that must be on disk before
1169 * we're allowed to commit. This is basically the ext3 style
1170 * data=ordered list.
1172 struct list_head ordered_operations
;
1175 * there is a pool of worker threads for checksumming during writes
1176 * and a pool for checksumming after reads. This is because readers
1177 * can run with FS locks held, and the writers may be waiting for
1178 * those locks. We don't want ordering in the pending list to cause
1179 * deadlocks, and so the two are serviced separately.
1181 * A third pool does submit_bio to avoid deadlocking with the other
1184 struct btrfs_workers generic_worker
;
1185 struct btrfs_workers workers
;
1186 struct btrfs_workers delalloc_workers
;
1187 struct btrfs_workers endio_workers
;
1188 struct btrfs_workers endio_meta_workers
;
1189 struct btrfs_workers endio_meta_write_workers
;
1190 struct btrfs_workers endio_write_workers
;
1191 struct btrfs_workers endio_freespace_worker
;
1192 struct btrfs_workers submit_workers
;
1193 struct btrfs_workers caching_workers
;
1194 struct btrfs_workers readahead_workers
;
1197 * fixup workers take dirty pages that didn't properly go through
1198 * the cow mechanism and make them safe to write. It happens
1199 * for the sys_munmap function call path
1201 struct btrfs_workers fixup_workers
;
1202 struct btrfs_workers delayed_workers
;
1203 struct task_struct
*transaction_kthread
;
1204 struct task_struct
*cleaner_kthread
;
1205 int thread_pool_size
;
1207 struct kobject super_kobj
;
1208 struct completion kobj_unregister
;
1211 int log_root_recovering
;
1217 /* protected by the delalloc lock, used to keep from writing
1218 * metadata until there is a nice batch
1220 u64 dirty_metadata_bytes
;
1221 struct list_head dirty_cowonly_roots
;
1223 struct btrfs_fs_devices
*fs_devices
;
1226 * the space_info list is almost entirely read only. It only changes
1227 * when we add a new raid type to the FS, and that happens
1228 * very rarely. RCU is used to protect it.
1230 struct list_head space_info
;
1232 struct reloc_control
*reloc_ctl
;
1234 spinlock_t delalloc_lock
;
1237 /* data_alloc_cluster is only used in ssd mode */
1238 struct btrfs_free_cluster data_alloc_cluster
;
1240 /* all metadata allocations go through this cluster */
1241 struct btrfs_free_cluster meta_alloc_cluster
;
1243 /* auto defrag inodes go here */
1244 spinlock_t defrag_inodes_lock
;
1245 struct rb_root defrag_inodes
;
1246 atomic_t defrag_running
;
1248 spinlock_t ref_cache_lock
;
1249 u64 total_ref_cache_size
;
1252 * these three are in extended format (availability of single
1253 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1254 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1256 u64 avail_data_alloc_bits
;
1257 u64 avail_metadata_alloc_bits
;
1258 u64 avail_system_alloc_bits
;
1260 /* restriper state */
1261 spinlock_t balance_lock
;
1262 struct mutex balance_mutex
;
1263 atomic_t balance_running
;
1264 atomic_t balance_pause_req
;
1265 atomic_t balance_cancel_req
;
1266 struct btrfs_balance_control
*balance_ctl
;
1267 wait_queue_head_t balance_wait_q
;
1269 unsigned data_chunk_allocations
;
1270 unsigned metadata_ratio
;
1274 /* private scrub information */
1275 struct mutex scrub_lock
;
1276 atomic_t scrubs_running
;
1277 atomic_t scrub_pause_req
;
1278 atomic_t scrubs_paused
;
1279 atomic_t scrub_cancel_req
;
1280 wait_queue_head_t scrub_pause_wait
;
1281 struct rw_semaphore scrub_super_lock
;
1282 int scrub_workers_refcnt
;
1283 struct btrfs_workers scrub_workers
;
1285 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1286 u32 check_integrity_print_mask
;
1289 /* filesystem state */
1292 struct btrfs_delayed_root
*delayed_root
;
1294 /* readahead tree */
1295 spinlock_t reada_lock
;
1296 struct radix_tree_root reada_tree
;
1298 /* next backup root to be overwritten */
1299 int backup_root_index
;
1303 * in ram representation of the tree. extent_root is used for all allocations
1304 * and for the extent tree extent_root root.
1307 struct extent_buffer
*node
;
1309 struct extent_buffer
*commit_root
;
1310 struct btrfs_root
*log_root
;
1311 struct btrfs_root
*reloc_root
;
1313 struct btrfs_root_item root_item
;
1314 struct btrfs_key root_key
;
1315 struct btrfs_fs_info
*fs_info
;
1316 struct extent_io_tree dirty_log_pages
;
1318 struct kobject root_kobj
;
1319 struct completion kobj_unregister
;
1320 struct mutex objectid_mutex
;
1322 spinlock_t accounting_lock
;
1323 struct btrfs_block_rsv
*block_rsv
;
1325 /* free ino cache stuff */
1326 struct mutex fs_commit_mutex
;
1327 struct btrfs_free_space_ctl
*free_ino_ctl
;
1328 enum btrfs_caching_type cached
;
1329 spinlock_t cache_lock
;
1330 wait_queue_head_t cache_wait
;
1331 struct btrfs_free_space_ctl
*free_ino_pinned
;
1333 struct inode
*cache_inode
;
1335 struct mutex log_mutex
;
1336 wait_queue_head_t log_writer_wait
;
1337 wait_queue_head_t log_commit_wait
[2];
1338 atomic_t log_writers
;
1339 atomic_t log_commit
[2];
1340 unsigned long log_transid
;
1341 unsigned long last_log_commit
;
1342 unsigned long log_batch
;
1343 pid_t log_start_pid
;
1344 bool log_multiple_pids
;
1349 /* data allocations are done in sectorsize units */
1352 /* node allocations are done in nodesize units */
1355 /* leaf allocations are done in leafsize units */
1362 u64 highest_objectid
;
1364 /* btrfs_record_root_in_trans is a multi-step process,
1365 * and it can race with the balancing code. But the
1366 * race is very small, and only the first time the root
1367 * is added to each transaction. So in_trans_setup
1368 * is used to tell us when more checks are required
1370 unsigned long in_trans_setup
;
1375 u64 defrag_trans_start
;
1376 struct btrfs_key defrag_progress
;
1377 struct btrfs_key defrag_max
;
1381 /* the dirty list is only used by non-reference counted roots */
1382 struct list_head dirty_list
;
1384 struct list_head root_list
;
1386 spinlock_t orphan_lock
;
1387 struct list_head orphan_list
;
1388 struct btrfs_block_rsv
*orphan_block_rsv
;
1389 int orphan_item_inserted
;
1390 int orphan_cleanup_state
;
1392 spinlock_t inode_lock
;
1393 /* red-black tree that keeps track of in-memory inodes */
1394 struct rb_root inode_tree
;
1397 * radix tree that keeps track of delayed nodes of every inode,
1398 * protected by inode_lock
1400 struct radix_tree_root delayed_nodes_tree
;
1402 * right now this just gets used so that a root has its own devid
1403 * for stat. It may be used for more later
1410 struct btrfs_ioctl_defrag_range_args
{
1411 /* start of the defrag operation */
1414 /* number of bytes to defrag, use (u64)-1 to say all */
1418 * flags for the operation, which can include turning
1419 * on compression for this one defrag
1424 * any extent bigger than this will be considered
1425 * already defragged. Use 0 to take the kernel default
1426 * Use 1 to say every single extent must be rewritten
1428 __u32 extent_thresh
;
1431 * which compression method to use if turning on compression
1432 * for this defrag operation. If unspecified, zlib will
1435 __u32 compress_type
;
1437 /* spare for later */
1443 * inode items have the data typically returned from stat and store other
1444 * info about object characteristics. There is one for every file and dir in
1447 #define BTRFS_INODE_ITEM_KEY 1
1448 #define BTRFS_INODE_REF_KEY 12
1449 #define BTRFS_XATTR_ITEM_KEY 24
1450 #define BTRFS_ORPHAN_ITEM_KEY 48
1451 /* reserve 2-15 close to the inode for later flexibility */
1454 * dir items are the name -> inode pointers in a directory. There is one
1455 * for every name in a directory.
1457 #define BTRFS_DIR_LOG_ITEM_KEY 60
1458 #define BTRFS_DIR_LOG_INDEX_KEY 72
1459 #define BTRFS_DIR_ITEM_KEY 84
1460 #define BTRFS_DIR_INDEX_KEY 96
1462 * extent data is for file data
1464 #define BTRFS_EXTENT_DATA_KEY 108
1467 * extent csums are stored in a separate tree and hold csums for
1468 * an entire extent on disk.
1470 #define BTRFS_EXTENT_CSUM_KEY 128
1473 * root items point to tree roots. They are typically in the root
1474 * tree used by the super block to find all the other trees
1476 #define BTRFS_ROOT_ITEM_KEY 132
1479 * root backrefs tie subvols and snapshots to the directory entries that
1482 #define BTRFS_ROOT_BACKREF_KEY 144
1485 * root refs make a fast index for listing all of the snapshots and
1486 * subvolumes referenced by a given root. They point directly to the
1487 * directory item in the root that references the subvol
1489 #define BTRFS_ROOT_REF_KEY 156
1492 * extent items are in the extent map tree. These record which blocks
1493 * are used, and how many references there are to each block
1495 #define BTRFS_EXTENT_ITEM_KEY 168
1497 #define BTRFS_TREE_BLOCK_REF_KEY 176
1499 #define BTRFS_EXTENT_DATA_REF_KEY 178
1501 #define BTRFS_EXTENT_REF_V0_KEY 180
1503 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1505 #define BTRFS_SHARED_DATA_REF_KEY 184
1508 * block groups give us hints into the extent allocation trees. Which
1509 * blocks are free etc etc
1511 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1513 #define BTRFS_DEV_EXTENT_KEY 204
1514 #define BTRFS_DEV_ITEM_KEY 216
1515 #define BTRFS_CHUNK_ITEM_KEY 228
1517 #define BTRFS_BALANCE_ITEM_KEY 248
1520 * string items are for debugging. They just store a short string of
1523 #define BTRFS_STRING_ITEM_KEY 253
1526 * Flags for mount options.
1528 * Note: don't forget to add new options to btrfs_show_options()
1530 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1531 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1532 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1533 #define BTRFS_MOUNT_SSD (1 << 3)
1534 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1535 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1536 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1537 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1538 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1539 #define BTRFS_MOUNT_NOSSD (1 << 9)
1540 #define BTRFS_MOUNT_DISCARD (1 << 10)
1541 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1542 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1543 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1544 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1545 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1546 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1547 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1548 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1549 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1550 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1551 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1552 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1554 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1555 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1556 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1561 #define BTRFS_INODE_NODATASUM (1 << 0)
1562 #define BTRFS_INODE_NODATACOW (1 << 1)
1563 #define BTRFS_INODE_READONLY (1 << 2)
1564 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1565 #define BTRFS_INODE_PREALLOC (1 << 4)
1566 #define BTRFS_INODE_SYNC (1 << 5)
1567 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1568 #define BTRFS_INODE_APPEND (1 << 7)
1569 #define BTRFS_INODE_NODUMP (1 << 8)
1570 #define BTRFS_INODE_NOATIME (1 << 9)
1571 #define BTRFS_INODE_DIRSYNC (1 << 10)
1572 #define BTRFS_INODE_COMPRESS (1 << 11)
1574 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1576 struct btrfs_map_token
{
1577 struct extent_buffer
*eb
;
1579 unsigned long offset
;
1582 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1584 memset(token
, 0, sizeof(*token
));
1587 /* some macros to generate set/get funcs for the struct fields. This
1588 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1591 #define le8_to_cpu(v) (v)
1592 #define cpu_to_le8(v) (v)
1595 #define read_eb_member(eb, ptr, type, member, result) ( \
1596 read_extent_buffer(eb, (char *)(result), \
1597 ((unsigned long)(ptr)) + \
1598 offsetof(type, member), \
1599 sizeof(((type *)0)->member)))
1601 #define write_eb_member(eb, ptr, type, member, result) ( \
1602 write_extent_buffer(eb, (char *)(result), \
1603 ((unsigned long)(ptr)) + \
1604 offsetof(type, member), \
1605 sizeof(((type *)0)->member)))
1607 #ifndef BTRFS_SETGET_FUNCS
1608 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1609 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1610 u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
1611 void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
1612 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1615 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1616 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1618 type *p = page_address(eb->pages[0]); \
1619 u##bits res = le##bits##_to_cpu(p->member); \
1622 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1625 type *p = page_address(eb->pages[0]); \
1626 p->member = cpu_to_le##bits(val); \
1629 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1630 static inline u##bits btrfs_##name(type *s) \
1632 return le##bits##_to_cpu(s->member); \
1634 static inline void btrfs_set_##name(type *s, u##bits val) \
1636 s->member = cpu_to_le##bits(val); \
1639 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1640 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1641 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1642 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1643 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1644 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1646 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1647 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1648 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1649 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1650 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1651 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1653 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1654 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1656 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1658 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1660 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1662 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1664 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1665 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1667 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1669 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1671 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1674 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1676 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1679 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1681 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1684 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1685 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1686 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1687 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1688 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1689 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1690 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1691 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1692 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1693 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1694 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1696 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1698 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1701 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1702 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1703 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1705 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1707 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1709 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1711 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1712 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1714 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1716 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1717 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1719 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1722 unsigned long offset
= (unsigned long)c
;
1723 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1724 offset
+= nr
* sizeof(struct btrfs_stripe
);
1725 return (struct btrfs_stripe
*)offset
;
1728 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1730 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1733 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1734 struct btrfs_chunk
*c
, int nr
)
1736 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1739 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1740 struct btrfs_chunk
*c
, int nr
)
1742 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1745 /* struct btrfs_block_group_item */
1746 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1748 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1750 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1751 struct btrfs_block_group_item
, chunk_objectid
, 64);
1753 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1754 struct btrfs_block_group_item
, chunk_objectid
, 64);
1755 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1756 struct btrfs_block_group_item
, flags
, 64);
1757 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1758 struct btrfs_block_group_item
, flags
, 64);
1760 /* struct btrfs_inode_ref */
1761 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1762 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1764 /* struct btrfs_inode_item */
1765 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1766 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1767 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1768 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1769 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1770 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1771 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1772 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1773 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1774 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1775 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1776 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1778 static inline struct btrfs_timespec
*
1779 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1781 unsigned long ptr
= (unsigned long)inode_item
;
1782 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1783 return (struct btrfs_timespec
*)ptr
;
1786 static inline struct btrfs_timespec
*
1787 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1789 unsigned long ptr
= (unsigned long)inode_item
;
1790 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1791 return (struct btrfs_timespec
*)ptr
;
1794 static inline struct btrfs_timespec
*
1795 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1797 unsigned long ptr
= (unsigned long)inode_item
;
1798 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1799 return (struct btrfs_timespec
*)ptr
;
1802 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1803 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1805 /* struct btrfs_dev_extent */
1806 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1808 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1809 chunk_objectid
, 64);
1810 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1812 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1814 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1816 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1817 return (u8
*)((unsigned long)dev
+ ptr
);
1820 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1821 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1823 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1825 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1828 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1830 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1831 struct btrfs_tree_block_info
*item
,
1832 struct btrfs_disk_key
*key
)
1834 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1837 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1838 struct btrfs_tree_block_info
*item
,
1839 struct btrfs_disk_key
*key
)
1841 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1844 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1846 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1848 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1850 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1853 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1856 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1858 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1861 static inline u32
btrfs_extent_inline_ref_size(int type
)
1863 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1864 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1865 return sizeof(struct btrfs_extent_inline_ref
);
1866 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1867 return sizeof(struct btrfs_shared_data_ref
) +
1868 sizeof(struct btrfs_extent_inline_ref
);
1869 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1870 return sizeof(struct btrfs_extent_data_ref
) +
1871 offsetof(struct btrfs_extent_inline_ref
, offset
);
1876 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1877 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1879 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1880 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1882 /* struct btrfs_node */
1883 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1884 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1886 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1889 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1890 sizeof(struct btrfs_key_ptr
) * nr
;
1891 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1894 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1898 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1899 sizeof(struct btrfs_key_ptr
) * nr
;
1900 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1903 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1906 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1907 sizeof(struct btrfs_key_ptr
) * nr
;
1908 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1911 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1915 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1916 sizeof(struct btrfs_key_ptr
) * nr
;
1917 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1920 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1922 return offsetof(struct btrfs_node
, ptrs
) +
1923 sizeof(struct btrfs_key_ptr
) * nr
;
1926 void btrfs_node_key(struct extent_buffer
*eb
,
1927 struct btrfs_disk_key
*disk_key
, int nr
);
1929 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1930 struct btrfs_disk_key
*disk_key
, int nr
)
1933 ptr
= btrfs_node_key_ptr_offset(nr
);
1934 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1935 struct btrfs_key_ptr
, key
, disk_key
);
1938 /* struct btrfs_item */
1939 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1940 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1942 static inline unsigned long btrfs_item_nr_offset(int nr
)
1944 return offsetof(struct btrfs_leaf
, items
) +
1945 sizeof(struct btrfs_item
) * nr
;
1948 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1951 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1954 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1955 struct btrfs_item
*item
)
1957 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1960 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1962 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1965 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1967 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1970 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1972 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1975 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1976 struct btrfs_disk_key
*disk_key
, int nr
)
1978 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1979 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1982 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1983 struct btrfs_disk_key
*disk_key
, int nr
)
1985 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1986 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1989 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1992 * struct btrfs_root_ref
1994 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1995 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1996 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1998 /* struct btrfs_dir_item */
1999 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2000 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2001 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2002 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2004 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2005 struct btrfs_dir_item
*item
,
2006 struct btrfs_disk_key
*key
)
2008 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2011 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2012 struct btrfs_dir_item
*item
,
2013 struct btrfs_disk_key
*key
)
2015 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2018 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2020 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2022 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2025 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2026 struct btrfs_free_space_header
*h
,
2027 struct btrfs_disk_key
*key
)
2029 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2032 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2033 struct btrfs_free_space_header
*h
,
2034 struct btrfs_disk_key
*key
)
2036 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2039 /* struct btrfs_disk_key */
2040 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2042 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2043 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2045 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2046 struct btrfs_disk_key
*disk
)
2048 cpu
->offset
= le64_to_cpu(disk
->offset
);
2049 cpu
->type
= disk
->type
;
2050 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2053 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2054 struct btrfs_key
*cpu
)
2056 disk
->offset
= cpu_to_le64(cpu
->offset
);
2057 disk
->type
= cpu
->type
;
2058 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2061 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2062 struct btrfs_key
*key
, int nr
)
2064 struct btrfs_disk_key disk_key
;
2065 btrfs_node_key(eb
, &disk_key
, nr
);
2066 btrfs_disk_key_to_cpu(key
, &disk_key
);
2069 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2070 struct btrfs_key
*key
, int nr
)
2072 struct btrfs_disk_key disk_key
;
2073 btrfs_item_key(eb
, &disk_key
, nr
);
2074 btrfs_disk_key_to_cpu(key
, &disk_key
);
2077 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2078 struct btrfs_dir_item
*item
,
2079 struct btrfs_key
*key
)
2081 struct btrfs_disk_key disk_key
;
2082 btrfs_dir_item_key(eb
, item
, &disk_key
);
2083 btrfs_disk_key_to_cpu(key
, &disk_key
);
2087 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2092 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2097 /* struct btrfs_header */
2098 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2099 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2101 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2102 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2103 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2104 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2106 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2108 return (btrfs_header_flags(eb
) & flag
) == flag
;
2111 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2113 u64 flags
= btrfs_header_flags(eb
);
2114 btrfs_set_header_flags(eb
, flags
| flag
);
2115 return (flags
& flag
) == flag
;
2118 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2120 u64 flags
= btrfs_header_flags(eb
);
2121 btrfs_set_header_flags(eb
, flags
& ~flag
);
2122 return (flags
& flag
) == flag
;
2125 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2127 u64 flags
= btrfs_header_flags(eb
);
2128 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2131 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2134 u64 flags
= btrfs_header_flags(eb
);
2135 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2136 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2137 btrfs_set_header_flags(eb
, flags
);
2140 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2142 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2146 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2148 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2152 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2154 return btrfs_header_level(eb
) == 0;
2157 /* struct btrfs_root_item */
2158 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2160 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2161 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2162 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2164 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2166 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2167 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2168 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2169 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2170 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2171 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2172 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2173 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2176 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2178 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
2181 /* struct btrfs_root_backup */
2182 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2184 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2186 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2187 tree_root_level
, 8);
2189 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2191 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2192 chunk_root_gen
, 64);
2193 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2194 chunk_root_level
, 8);
2196 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2198 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2199 extent_root_gen
, 64);
2200 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2201 extent_root_level
, 8);
2203 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2205 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2207 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2210 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2212 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2214 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2217 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2219 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2221 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2222 csum_root_level
, 8);
2223 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2225 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2227 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2230 /* struct btrfs_balance_item */
2231 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2233 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2234 struct btrfs_balance_item
*bi
,
2235 struct btrfs_disk_balance_args
*ba
)
2237 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2240 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2241 struct btrfs_balance_item
*bi
,
2242 struct btrfs_disk_balance_args
*ba
)
2244 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2247 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2248 struct btrfs_balance_item
*bi
,
2249 struct btrfs_disk_balance_args
*ba
)
2251 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2254 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2255 struct btrfs_balance_item
*bi
,
2256 struct btrfs_disk_balance_args
*ba
)
2258 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2261 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2262 struct btrfs_balance_item
*bi
,
2263 struct btrfs_disk_balance_args
*ba
)
2265 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2268 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2269 struct btrfs_balance_item
*bi
,
2270 struct btrfs_disk_balance_args
*ba
)
2272 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2276 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2277 struct btrfs_disk_balance_args
*disk
)
2279 memset(cpu
, 0, sizeof(*cpu
));
2281 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2282 cpu
->usage
= le64_to_cpu(disk
->usage
);
2283 cpu
->devid
= le64_to_cpu(disk
->devid
);
2284 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2285 cpu
->pend
= le64_to_cpu(disk
->pend
);
2286 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2287 cpu
->vend
= le64_to_cpu(disk
->vend
);
2288 cpu
->target
= le64_to_cpu(disk
->target
);
2289 cpu
->flags
= le64_to_cpu(disk
->flags
);
2293 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2294 struct btrfs_balance_args
*cpu
)
2296 memset(disk
, 0, sizeof(*disk
));
2298 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2299 disk
->usage
= cpu_to_le64(cpu
->usage
);
2300 disk
->devid
= cpu_to_le64(cpu
->devid
);
2301 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2302 disk
->pend
= cpu_to_le64(cpu
->pend
);
2303 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2304 disk
->vend
= cpu_to_le64(cpu
->vend
);
2305 disk
->target
= cpu_to_le64(cpu
->target
);
2306 disk
->flags
= cpu_to_le64(cpu
->flags
);
2309 /* struct btrfs_super_block */
2310 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2311 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2312 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2314 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2315 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2316 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2317 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2318 struct btrfs_super_block
, chunk_root_generation
, 64);
2319 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2321 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2323 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2324 chunk_root_level
, 8);
2325 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2327 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2328 log_root_transid
, 64);
2329 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2331 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2333 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2335 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2337 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2339 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2341 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2343 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2344 root_dir_objectid
, 64);
2345 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2347 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2349 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2350 compat_ro_flags
, 64);
2351 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2352 incompat_flags
, 64);
2353 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2355 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2356 cache_generation
, 64);
2358 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2360 int t
= btrfs_super_csum_type(s
);
2361 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2362 return btrfs_csum_sizes
[t
];
2365 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2367 return offsetof(struct btrfs_leaf
, items
);
2370 /* struct btrfs_file_extent_item */
2371 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2373 static inline unsigned long
2374 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2376 unsigned long offset
= (unsigned long)e
;
2377 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2381 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2383 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2386 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2388 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2390 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2391 disk_num_bytes
, 64);
2392 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2394 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2396 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2398 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2400 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2402 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2403 other_encoding
, 16);
2405 /* this returns the number of file bytes represented by the inline item.
2406 * If an item is compressed, this is the uncompressed size
2408 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2409 struct btrfs_file_extent_item
*e
)
2411 return btrfs_file_extent_ram_bytes(eb
, e
);
2415 * this returns the number of bytes used by the item on disk, minus the
2416 * size of any extent headers. If a file is compressed on disk, this is
2417 * the compressed size
2419 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2420 struct btrfs_item
*e
)
2422 unsigned long offset
;
2423 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2424 return btrfs_item_size(eb
, e
) - offset
;
2427 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2429 return sb
->s_fs_info
;
2432 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2435 return root
->leafsize
;
2436 return root
->nodesize
;
2439 /* helper function to cast into the data area of the leaf. */
2440 #define btrfs_item_ptr(leaf, slot, type) \
2441 ((type *)(btrfs_leaf_data(leaf) + \
2442 btrfs_item_offset_nr(leaf, slot)))
2444 #define btrfs_item_ptr_offset(leaf, slot) \
2445 ((unsigned long)(btrfs_leaf_data(leaf) + \
2446 btrfs_item_offset_nr(leaf, slot)))
2448 static inline struct dentry
*fdentry(struct file
*file
)
2450 return file
->f_path
.dentry
;
2453 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2455 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2456 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2459 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2461 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2465 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2468 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2473 * Doing a truncate won't result in new nodes or leaves, just what we need for
2476 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2479 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2483 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2484 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2485 struct btrfs_root
*root
, unsigned long count
);
2486 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2487 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2488 struct btrfs_root
*root
, u64 bytenr
,
2489 u64 num_bytes
, u64
*refs
, u64
*flags
);
2490 int btrfs_pin_extent(struct btrfs_root
*root
,
2491 u64 bytenr
, u64 num
, int reserved
);
2492 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2493 struct btrfs_root
*root
,
2494 u64 bytenr
, u64 num_bytes
);
2495 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2496 struct btrfs_root
*root
,
2497 u64 objectid
, u64 offset
, u64 bytenr
);
2498 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2499 struct btrfs_fs_info
*info
,
2501 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2502 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2503 u64 search_start
, u64 search_hint
, int owner
);
2504 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2505 struct btrfs_root
*root
, u32 blocksize
,
2506 u64 parent
, u64 root_objectid
,
2507 struct btrfs_disk_key
*key
, int level
,
2508 u64 hint
, u64 empty_size
);
2509 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2510 struct btrfs_root
*root
,
2511 struct extent_buffer
*buf
,
2512 u64 parent
, int last_ref
);
2513 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2514 struct btrfs_root
*root
,
2515 u64 bytenr
, u32 blocksize
,
2517 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2518 struct btrfs_root
*root
,
2519 u64 root_objectid
, u64 owner
,
2520 u64 offset
, struct btrfs_key
*ins
);
2521 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2522 struct btrfs_root
*root
,
2523 u64 root_objectid
, u64 owner
, u64 offset
,
2524 struct btrfs_key
*ins
);
2525 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2526 struct btrfs_root
*root
,
2527 u64 num_bytes
, u64 min_alloc_size
,
2528 u64 empty_size
, u64 hint_byte
,
2529 struct btrfs_key
*ins
, u64 data
);
2530 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2531 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2532 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2533 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2534 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2535 struct btrfs_root
*root
,
2536 u64 bytenr
, u64 num_bytes
, u64 flags
,
2538 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2539 struct btrfs_root
*root
,
2540 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2541 u64 owner
, u64 offset
, int for_cow
);
2543 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2544 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2545 u64 start
, u64 len
);
2546 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2547 struct btrfs_root
*root
);
2548 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2549 struct btrfs_root
*root
);
2550 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2551 struct btrfs_root
*root
,
2552 u64 bytenr
, u64 num_bytes
, u64 parent
,
2553 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
2555 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2556 struct btrfs_root
*root
);
2557 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2558 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2559 int btrfs_read_block_groups(struct btrfs_root
*root
);
2560 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2561 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2562 struct btrfs_root
*root
, u64 bytes_used
,
2563 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2565 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2566 struct btrfs_root
*root
, u64 group_start
);
2567 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2568 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2569 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2570 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2571 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2572 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2573 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2574 struct btrfs_root
*root
);
2575 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2576 struct inode
*inode
);
2577 void btrfs_orphan_release_metadata(struct inode
*inode
);
2578 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2579 struct btrfs_pending_snapshot
*pending
);
2580 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2581 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2582 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2583 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2584 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2585 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2586 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2587 struct btrfs_block_rsv
*rsv
);
2588 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2589 struct btrfs_block_rsv
*block_rsv
,
2591 int btrfs_block_rsv_add_noflush(struct btrfs_root
*root
,
2592 struct btrfs_block_rsv
*block_rsv
,
2594 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2595 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2596 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2597 struct btrfs_block_rsv
*block_rsv
,
2599 int btrfs_block_rsv_refill_noflush(struct btrfs_root
*root
,
2600 struct btrfs_block_rsv
*block_rsv
,
2602 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2603 struct btrfs_block_rsv
*dst_rsv
,
2605 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2606 struct btrfs_block_rsv
*block_rsv
,
2608 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2609 struct btrfs_block_group_cache
*cache
);
2610 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
2611 struct btrfs_block_group_cache
*cache
);
2612 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2613 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2614 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2615 u64 start
, u64 end
);
2616 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2617 u64 num_bytes
, u64
*actual_bytes
);
2618 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2619 struct btrfs_root
*root
, u64 type
);
2620 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2622 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2624 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2625 int level
, int *slot
);
2626 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2627 int btrfs_previous_item(struct btrfs_root
*root
,
2628 struct btrfs_path
*path
, u64 min_objectid
,
2630 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2631 struct btrfs_root
*root
, struct btrfs_path
*path
,
2632 struct btrfs_key
*new_key
);
2633 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2634 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2635 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2636 struct btrfs_key
*key
, int lowest_level
,
2637 int cache_only
, u64 min_trans
);
2638 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2639 struct btrfs_key
*max_key
,
2640 struct btrfs_path
*path
, int cache_only
,
2642 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2643 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2644 struct extent_buffer
*parent
, int parent_slot
,
2645 struct extent_buffer
**cow_ret
);
2646 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2647 struct btrfs_root
*root
,
2648 struct extent_buffer
*buf
,
2649 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2650 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2651 struct extent_buffer
*buf
);
2652 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
2653 struct btrfs_root
*root
, struct btrfs_path
*path
,
2655 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2656 struct btrfs_root
*root
,
2657 struct btrfs_path
*path
,
2658 u32 new_size
, int from_end
);
2659 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2660 struct btrfs_root
*root
,
2661 struct btrfs_path
*path
,
2662 struct btrfs_key
*new_key
,
2663 unsigned long split_offset
);
2664 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2665 struct btrfs_root
*root
,
2666 struct btrfs_path
*path
,
2667 struct btrfs_key
*new_key
);
2668 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2669 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2671 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2672 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2673 int start_slot
, int cache_only
, u64
*last_ret
,
2674 struct btrfs_key
*progress
);
2675 void btrfs_release_path(struct btrfs_path
*p
);
2676 struct btrfs_path
*btrfs_alloc_path(void);
2677 void btrfs_free_path(struct btrfs_path
*p
);
2678 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2679 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2680 struct extent_buffer
*held
, int held_rw
);
2681 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2683 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2684 struct btrfs_path
*path
, int slot
, int nr
);
2685 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2686 struct btrfs_root
*root
,
2687 struct btrfs_path
*path
)
2689 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2692 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2693 struct btrfs_root
*root
, struct btrfs_path
*path
,
2694 struct btrfs_key
*cpu_key
, u32
*data_size
,
2695 u32 total_data
, u32 total_size
, int nr
);
2696 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2697 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2698 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2699 struct btrfs_root
*root
,
2700 struct btrfs_path
*path
,
2701 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2703 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2704 struct btrfs_root
*root
,
2705 struct btrfs_path
*path
,
2706 struct btrfs_key
*key
,
2709 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2712 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2713 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2716 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2717 return btrfs_next_leaf(root
, p
);
2720 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2721 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2722 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2723 struct btrfs_block_rsv
*block_rsv
,
2724 int update_ref
, int for_reloc
);
2725 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2726 struct btrfs_root
*root
,
2727 struct extent_buffer
*node
,
2728 struct extent_buffer
*parent
);
2729 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2732 * Get synced with close_ctree()
2735 return fs_info
->closing
;
2737 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2739 kfree(fs_info
->balance_ctl
);
2740 kfree(fs_info
->delayed_root
);
2741 kfree(fs_info
->extent_root
);
2742 kfree(fs_info
->tree_root
);
2743 kfree(fs_info
->chunk_root
);
2744 kfree(fs_info
->dev_root
);
2745 kfree(fs_info
->csum_root
);
2746 kfree(fs_info
->super_copy
);
2747 kfree(fs_info
->super_for_commit
);
2752 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2753 struct btrfs_path
*path
,
2754 u64 root_id
, u64 ref_id
);
2755 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2756 struct btrfs_root
*tree_root
,
2757 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2758 const char *name
, int name_len
);
2759 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2760 struct btrfs_root
*tree_root
,
2761 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2762 const char *name
, int name_len
);
2763 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2764 struct btrfs_key
*key
);
2765 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2766 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2768 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2769 struct btrfs_root
*root
,
2770 struct btrfs_key
*key
,
2771 struct btrfs_root_item
*item
);
2772 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2773 btrfs_root_item
*item
, struct btrfs_key
*key
);
2774 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2775 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2776 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2777 struct extent_buffer
*node
);
2778 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2781 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2782 struct btrfs_root
*root
, const char *name
,
2783 int name_len
, struct inode
*dir
,
2784 struct btrfs_key
*location
, u8 type
, u64 index
);
2785 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2786 struct btrfs_root
*root
,
2787 struct btrfs_path
*path
, u64 dir
,
2788 const char *name
, int name_len
,
2790 struct btrfs_dir_item
*
2791 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2792 struct btrfs_root
*root
,
2793 struct btrfs_path
*path
, u64 dir
,
2794 u64 objectid
, const char *name
, int name_len
,
2796 struct btrfs_dir_item
*
2797 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2798 struct btrfs_path
*path
, u64 dirid
,
2799 const char *name
, int name_len
);
2800 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2801 struct btrfs_path
*path
,
2802 const char *name
, int name_len
);
2803 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2804 struct btrfs_root
*root
,
2805 struct btrfs_path
*path
,
2806 struct btrfs_dir_item
*di
);
2807 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2808 struct btrfs_root
*root
,
2809 struct btrfs_path
*path
, u64 objectid
,
2810 const char *name
, u16 name_len
,
2811 const void *data
, u16 data_len
);
2812 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2813 struct btrfs_root
*root
,
2814 struct btrfs_path
*path
, u64 dir
,
2815 const char *name
, u16 name_len
,
2817 int verify_dir_item(struct btrfs_root
*root
,
2818 struct extent_buffer
*leaf
,
2819 struct btrfs_dir_item
*dir_item
);
2822 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2823 struct btrfs_root
*root
, u64 offset
);
2824 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2825 struct btrfs_root
*root
, u64 offset
);
2826 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2829 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2830 struct btrfs_root
*root
,
2831 const char *name
, int name_len
,
2832 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2833 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2834 struct btrfs_root
*root
,
2835 const char *name
, int name_len
,
2836 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2837 struct btrfs_inode_ref
*
2838 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2839 struct btrfs_root
*root
,
2840 struct btrfs_path
*path
,
2841 const char *name
, int name_len
,
2842 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2843 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2844 struct btrfs_root
*root
,
2845 struct btrfs_path
*path
, u64 objectid
);
2846 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2847 *root
, struct btrfs_path
*path
,
2848 struct btrfs_key
*location
, int mod
);
2851 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2852 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2853 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2854 struct bio
*bio
, u32
*dst
);
2855 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2856 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2857 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2858 struct btrfs_root
*root
,
2859 u64 objectid
, u64 pos
,
2860 u64 disk_offset
, u64 disk_num_bytes
,
2861 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2862 u8 compression
, u8 encryption
, u16 other_encoding
);
2863 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2864 struct btrfs_root
*root
,
2865 struct btrfs_path
*path
, u64 objectid
,
2866 u64 bytenr
, int mod
);
2867 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2868 struct btrfs_root
*root
,
2869 struct btrfs_ordered_sum
*sums
);
2870 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2871 struct bio
*bio
, u64 file_start
, int contig
);
2872 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2873 struct btrfs_root
*root
,
2874 struct btrfs_path
*path
,
2875 u64 bytenr
, int cow
);
2876 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2877 struct btrfs_root
*root
, struct btrfs_path
*path
,
2879 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2880 struct list_head
*list
, int search_commit
);
2882 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
2883 size_t pg_offset
, u64 start
, u64 len
,
2886 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2887 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2888 #define ClearPageChecked ClearPageFsMisc
2889 #define SetPageChecked SetPageFsMisc
2890 #define PageChecked PageFsMisc
2893 /* This forces readahead on a given range of bytes in an inode */
2894 static inline void btrfs_force_ra(struct address_space
*mapping
,
2895 struct file_ra_state
*ra
, struct file
*file
,
2896 pgoff_t offset
, unsigned long req_size
)
2898 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
2901 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2902 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2903 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2904 struct btrfs_root
*root
,
2905 struct inode
*dir
, struct inode
*inode
,
2906 const char *name
, int name_len
);
2907 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2908 struct inode
*parent_inode
, struct inode
*inode
,
2909 const char *name
, int name_len
, int add_backref
, u64 index
);
2910 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2911 struct btrfs_root
*root
,
2912 struct inode
*dir
, u64 objectid
,
2913 const char *name
, int name_len
);
2914 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2915 struct btrfs_root
*root
,
2916 struct inode
*inode
, u64 new_size
,
2919 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2920 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2921 struct extent_state
**cached_state
);
2922 int btrfs_writepages(struct address_space
*mapping
,
2923 struct writeback_control
*wbc
);
2924 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2925 struct btrfs_root
*new_root
, u64 new_dirid
);
2926 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2927 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2929 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2930 int btrfs_readpage(struct file
*file
, struct page
*page
);
2931 void btrfs_evict_inode(struct inode
*inode
);
2932 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2933 int btrfs_dirty_inode(struct inode
*inode
);
2934 int btrfs_update_time(struct file
*file
);
2935 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2936 void btrfs_destroy_inode(struct inode
*inode
);
2937 int btrfs_drop_inode(struct inode
*inode
);
2938 int btrfs_init_cachep(void);
2939 void btrfs_destroy_cachep(void);
2940 long btrfs_ioctl_trans_end(struct file
*file
);
2941 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2942 struct btrfs_root
*root
, int *was_new
);
2943 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2944 size_t pg_offset
, u64 start
, u64 end
,
2946 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2947 struct btrfs_root
*root
,
2948 struct inode
*inode
);
2949 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2950 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2951 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2952 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2953 struct btrfs_root
*root
);
2954 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2955 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
2956 void btrfs_add_delayed_iput(struct inode
*inode
);
2957 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2958 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2959 u64 start
, u64 num_bytes
, u64 min_size
,
2960 loff_t actual_len
, u64
*alloc_hint
);
2961 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2962 struct btrfs_trans_handle
*trans
, int mode
,
2963 u64 start
, u64 num_bytes
, u64 min_size
,
2964 loff_t actual_len
, u64
*alloc_hint
);
2965 extern const struct dentry_operations btrfs_dentry_operations
;
2968 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2969 void btrfs_update_iflags(struct inode
*inode
);
2970 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2971 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
2972 struct btrfs_ioctl_defrag_range_args
*range
,
2973 u64 newer_than
, unsigned long max_pages
);
2975 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
2976 struct inode
*inode
);
2977 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
2978 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
2979 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2981 extern const struct file_operations btrfs_file_operations
;
2982 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2983 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2984 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2985 struct inode
*inode
, u64 start
, u64 end
);
2986 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2987 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2988 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2989 struct page
**pages
, size_t num_pages
,
2990 loff_t pos
, size_t write_bytes
,
2991 struct extent_state
**cached
);
2994 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2995 struct btrfs_root
*root
, int cache_only
);
2998 int btrfs_init_sysfs(void);
2999 void btrfs_exit_sysfs(void);
3002 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3005 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3006 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3007 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3008 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3009 unsigned int line
, int errno
, const char *fmt
, ...);
3011 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3012 struct btrfs_root
*root
, const char *function
,
3013 unsigned int line
, int errno
);
3015 #define btrfs_abort_transaction(trans, root, errno) \
3017 __btrfs_abort_transaction(trans, root, __func__, \
3021 #define btrfs_std_error(fs_info, errno) \
3024 __btrfs_std_error((fs_info), __func__, \
3025 __LINE__, (errno), NULL); \
3028 #define btrfs_error(fs_info, errno, fmt, args...) \
3030 __btrfs_std_error((fs_info), __func__, __LINE__, \
3031 (errno), fmt, ##args); \
3034 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3035 unsigned int line
, int errno
, const char *fmt
, ...);
3037 #define btrfs_panic(fs_info, errno, fmt, args...) \
3039 struct btrfs_fs_info *_i = (fs_info); \
3040 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3041 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3045 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3046 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3047 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3048 struct inode
*inode
, struct inode
*dir
);
3049 int btrfs_acl_chmod(struct inode
*inode
);
3051 #define btrfs_get_acl NULL
3052 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3053 struct inode
*inode
, struct inode
*dir
)
3057 static inline int btrfs_acl_chmod(struct inode
*inode
)
3064 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3065 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3066 struct btrfs_root
*root
);
3067 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3068 struct btrfs_root
*root
);
3069 int btrfs_recover_relocation(struct btrfs_root
*root
);
3070 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3071 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3072 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3073 struct extent_buffer
*cow
);
3074 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3075 struct btrfs_pending_snapshot
*pending
,
3076 u64
*bytes_to_reserve
);
3077 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3078 struct btrfs_pending_snapshot
*pending
);
3081 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
3082 struct btrfs_scrub_progress
*progress
, int readonly
);
3083 void btrfs_scrub_pause(struct btrfs_root
*root
);
3084 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3085 void btrfs_scrub_continue(struct btrfs_root
*root
);
3086 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3087 int __btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3088 int btrfs_scrub_cancel(struct btrfs_root
*root
);
3089 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
3090 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3091 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3092 struct btrfs_scrub_progress
*progress
);
3095 struct reada_control
{
3096 struct btrfs_root
*root
; /* tree to prefetch */
3097 struct btrfs_key key_start
;
3098 struct btrfs_key key_end
; /* exclusive */
3101 wait_queue_head_t wait
;
3103 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3104 struct btrfs_key
*start
, struct btrfs_key
*end
);
3105 int btrfs_reada_wait(void *handle
);
3106 void btrfs_reada_detach(void *handle
);
3107 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3108 u64 start
, int err
);
3110 /* delayed seq elem */
3112 struct list_head list
;