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 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for sotring
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
149 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
152 * we can actually store much bigger names, but lets not confuse the rest
155 #define BTRFS_NAME_LEN 255
157 /* 32 bytes in various csum fields */
158 #define BTRFS_CSUM_SIZE 32
161 #define BTRFS_CSUM_TYPE_CRC32 0
163 static int btrfs_csum_sizes
[] = { 4, 0 };
165 /* four bytes for CRC32 */
166 #define BTRFS_EMPTY_DIR_SIZE 0
168 #define BTRFS_FT_UNKNOWN 0
169 #define BTRFS_FT_REG_FILE 1
170 #define BTRFS_FT_DIR 2
171 #define BTRFS_FT_CHRDEV 3
172 #define BTRFS_FT_BLKDEV 4
173 #define BTRFS_FT_FIFO 5
174 #define BTRFS_FT_SOCK 6
175 #define BTRFS_FT_SYMLINK 7
176 #define BTRFS_FT_XATTR 8
177 #define BTRFS_FT_MAX 9
179 /* ioprio of readahead is set to idle */
180 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
183 * The key defines the order in the tree, and so it also defines (optimal)
186 * objectid corresponds to the inode number.
188 * type tells us things about the object, and is a kind of stream selector.
189 * so for a given inode, keys with type of 1 might refer to the inode data,
190 * type of 2 may point to file data in the btree and type == 3 may point to
193 * offset is the starting byte offset for this key in the stream.
195 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
196 * in cpu native order. Otherwise they are identical and their sizes
197 * should be the same (ie both packed)
199 struct btrfs_disk_key
{
203 } __attribute__ ((__packed__
));
209 } __attribute__ ((__packed__
));
211 struct btrfs_mapping_tree
{
212 struct extent_map_tree map_tree
;
215 struct btrfs_dev_item
{
216 /* the internal btrfs device id */
219 /* size of the device */
225 /* optimal io alignment for this device */
228 /* optimal io width for this device */
231 /* minimal io size for this device */
234 /* type and info about this device */
237 /* expected generation for this device */
241 * starting byte of this partition on the device,
242 * to allow for stripe alignment in the future
246 /* grouping information for allocation decisions */
249 /* seek speed 0-100 where 100 is fastest */
252 /* bandwidth 0-100 where 100 is fastest */
255 /* btrfs generated uuid for this device */
256 u8 uuid
[BTRFS_UUID_SIZE
];
258 /* uuid of FS who owns this device */
259 u8 fsid
[BTRFS_UUID_SIZE
];
260 } __attribute__ ((__packed__
));
262 struct btrfs_stripe
{
265 u8 dev_uuid
[BTRFS_UUID_SIZE
];
266 } __attribute__ ((__packed__
));
269 /* size of this chunk in bytes */
272 /* objectid of the root referencing this chunk */
278 /* optimal io alignment for this chunk */
281 /* optimal io width for this chunk */
284 /* minimal io size for this chunk */
287 /* 2^16 stripes is quite a lot, a second limit is the size of a single
292 /* sub stripes only matter for raid10 */
294 struct btrfs_stripe stripe
;
295 /* additional stripes go here */
296 } __attribute__ ((__packed__
));
298 #define BTRFS_FREE_SPACE_EXTENT 1
299 #define BTRFS_FREE_SPACE_BITMAP 2
301 struct btrfs_free_space_entry
{
305 } __attribute__ ((__packed__
));
307 struct btrfs_free_space_header
{
308 struct btrfs_disk_key location
;
312 } __attribute__ ((__packed__
));
314 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
316 BUG_ON(num_stripes
== 0);
317 return sizeof(struct btrfs_chunk
) +
318 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
321 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
322 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
328 /* Errors detected */
329 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
331 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
332 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
334 #define BTRFS_BACKREF_REV_MAX 256
335 #define BTRFS_BACKREF_REV_SHIFT 56
336 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
337 BTRFS_BACKREF_REV_SHIFT)
339 #define BTRFS_OLD_BACKREF_REV 0
340 #define BTRFS_MIXED_BACKREF_REV 1
343 * every tree block (leaf or node) starts with this header.
345 struct btrfs_header
{
346 /* these first four must match the super block */
347 u8 csum
[BTRFS_CSUM_SIZE
];
348 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
349 __le64 bytenr
; /* which block this node is supposed to live in */
352 /* allowed to be different from the super from here on down */
353 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
358 } __attribute__ ((__packed__
));
360 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
361 sizeof(struct btrfs_header)) / \
362 sizeof(struct btrfs_key_ptr))
363 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
364 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
365 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
366 sizeof(struct btrfs_item) - \
367 sizeof(struct btrfs_file_extent_item))
368 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
369 sizeof(struct btrfs_item) -\
370 sizeof(struct btrfs_dir_item))
374 * this is a very generous portion of the super block, giving us
375 * room to translate 14 chunks with 3 stripes each.
377 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
378 #define BTRFS_LABEL_SIZE 256
381 * just in case we somehow lose the roots and are not able to mount,
382 * we store an array of the roots from previous transactions
385 #define BTRFS_NUM_BACKUP_ROOTS 4
386 struct btrfs_root_backup
{
388 __le64 tree_root_gen
;
391 __le64 chunk_root_gen
;
394 __le64 extent_root_gen
;
403 __le64 csum_root_gen
;
413 u8 extent_root_level
;
417 /* future and to align */
419 } __attribute__ ((__packed__
));
422 * the super block basically lists the main trees of the FS
423 * it currently lacks any block count etc etc
425 struct btrfs_super_block
{
426 u8 csum
[BTRFS_CSUM_SIZE
];
427 /* the first 4 fields must match struct btrfs_header */
428 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
429 __le64 bytenr
; /* this block number */
432 /* allowed to be different from the btrfs_header from here own down */
439 /* this will help find the new super based on the log root */
440 __le64 log_root_transid
;
443 __le64 root_dir_objectid
;
449 __le32 sys_chunk_array_size
;
450 __le64 chunk_root_generation
;
452 __le64 compat_ro_flags
;
453 __le64 incompat_flags
;
458 struct btrfs_dev_item dev_item
;
460 char label
[BTRFS_LABEL_SIZE
];
462 __le64 cache_generation
;
464 /* future expansion */
466 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
467 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
468 } __attribute__ ((__packed__
));
471 * Compat flags that we support. If any incompat flags are set other than the
472 * ones specified below then we will fail to mount
474 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
475 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
476 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
477 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
479 * some patches floated around with a second compression method
480 * lets save that incompat here for when they do get in
481 * Note we don't actually support it, we're just reserving the
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
487 * older kernels tried to do bigger metadata blocks, but the
488 * code was pretty buggy. Lets not let them try anymore.
490 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
492 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
493 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
494 #define BTRFS_FEATURE_INCOMPAT_SUPP \
495 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
496 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
497 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
498 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
499 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
502 * A leaf is full of items. offset and size tell us where to find
503 * the item in the leaf (relative to the start of the data area)
506 struct btrfs_disk_key key
;
509 } __attribute__ ((__packed__
));
512 * leaves have an item area and a data area:
513 * [item0, item1....itemN] [free space] [dataN...data1, data0]
515 * The data is separate from the items to get the keys closer together
519 struct btrfs_header header
;
520 struct btrfs_item items
[];
521 } __attribute__ ((__packed__
));
524 * all non-leaf blocks are nodes, they hold only keys and pointers to
527 struct btrfs_key_ptr
{
528 struct btrfs_disk_key key
;
531 } __attribute__ ((__packed__
));
534 struct btrfs_header header
;
535 struct btrfs_key_ptr ptrs
[];
536 } __attribute__ ((__packed__
));
539 * btrfs_paths remember the path taken from the root down to the leaf.
540 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
541 * to any other levels that are present.
543 * The slots array records the index of the item or block pointer
544 * used while walking the tree.
547 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
548 int slots
[BTRFS_MAX_LEVEL
];
549 /* if there is real range locking, this locks field will change */
550 int locks
[BTRFS_MAX_LEVEL
];
552 /* keep some upper locks as we walk down */
556 * set by btrfs_split_item, tells search_slot to keep all locks
557 * and to force calls to keep space in the nodes
559 unsigned int search_for_split
:1;
560 unsigned int keep_locks
:1;
561 unsigned int skip_locking
:1;
562 unsigned int leave_spinning
:1;
563 unsigned int search_commit_root
:1;
567 * items in the extent btree are used to record the objectid of the
568 * owner of the block and the number of references
571 struct btrfs_extent_item
{
575 } __attribute__ ((__packed__
));
577 struct btrfs_extent_item_v0
{
579 } __attribute__ ((__packed__
));
581 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
582 sizeof(struct btrfs_item))
584 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
585 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
587 /* following flags only apply to tree blocks */
589 /* use full backrefs for extent pointers in the block */
590 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
593 * this flag is only used internally by scrub and may be changed at any time
594 * it is only declared here to avoid collisions
596 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
598 struct btrfs_tree_block_info
{
599 struct btrfs_disk_key key
;
601 } __attribute__ ((__packed__
));
603 struct btrfs_extent_data_ref
{
608 } __attribute__ ((__packed__
));
610 struct btrfs_shared_data_ref
{
612 } __attribute__ ((__packed__
));
614 struct btrfs_extent_inline_ref
{
617 } __attribute__ ((__packed__
));
619 /* old style backrefs item */
620 struct btrfs_extent_ref_v0
{
625 } __attribute__ ((__packed__
));
628 /* dev extents record free space on individual devices. The owner
629 * field points back to the chunk allocation mapping tree that allocated
630 * the extent. The chunk tree uuid field is a way to double check the owner
632 struct btrfs_dev_extent
{
634 __le64 chunk_objectid
;
637 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
638 } __attribute__ ((__packed__
));
640 struct btrfs_inode_ref
{
644 } __attribute__ ((__packed__
));
646 struct btrfs_timespec
{
649 } __attribute__ ((__packed__
));
651 enum btrfs_compression_type
{
652 BTRFS_COMPRESS_NONE
= 0,
653 BTRFS_COMPRESS_ZLIB
= 1,
654 BTRFS_COMPRESS_LZO
= 2,
655 BTRFS_COMPRESS_TYPES
= 2,
656 BTRFS_COMPRESS_LAST
= 3,
659 struct btrfs_inode_item
{
660 /* nfs style generation number */
662 /* transid that last touched this inode */
674 /* modification sequence number for NFS */
678 * a little future expansion, for more than this we can
679 * just grow the inode item and version it
682 struct btrfs_timespec atime
;
683 struct btrfs_timespec ctime
;
684 struct btrfs_timespec mtime
;
685 struct btrfs_timespec otime
;
686 } __attribute__ ((__packed__
));
688 struct btrfs_dir_log_item
{
690 } __attribute__ ((__packed__
));
692 struct btrfs_dir_item
{
693 struct btrfs_disk_key location
;
698 } __attribute__ ((__packed__
));
700 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
702 struct btrfs_root_item
{
703 struct btrfs_inode_item inode
;
709 __le64 last_snapshot
;
712 struct btrfs_disk_key drop_progress
;
717 * The following fields appear after subvol_uuids+subvol_times
722 * This generation number is used to test if the new fields are valid
723 * and up to date while reading the root item. Everytime the root item
724 * is written out, the "generation" field is copied into this field. If
725 * anyone ever mounted the fs with an older kernel, we will have
726 * mismatching generation values here and thus must invalidate the
727 * new fields. See btrfs_update_root and btrfs_find_last_root for
729 * the offset of generation_v2 is also used as the start for the memset
730 * when invalidating the fields.
732 __le64 generation_v2
;
733 u8 uuid
[BTRFS_UUID_SIZE
];
734 u8 parent_uuid
[BTRFS_UUID_SIZE
];
735 u8 received_uuid
[BTRFS_UUID_SIZE
];
736 __le64 ctransid
; /* updated when an inode changes */
737 __le64 otransid
; /* trans when created */
738 __le64 stransid
; /* trans when sent. non-zero for received subvol */
739 __le64 rtransid
; /* trans when received. non-zero for received subvol */
740 struct btrfs_timespec ctime
;
741 struct btrfs_timespec otime
;
742 struct btrfs_timespec stime
;
743 struct btrfs_timespec rtime
;
744 __le64 reserved
[8]; /* for future */
745 } __attribute__ ((__packed__
));
748 * this is used for both forward and backward root refs
750 struct btrfs_root_ref
{
754 } __attribute__ ((__packed__
));
756 struct btrfs_disk_balance_args
{
758 * profiles to operate on, single is denoted by
759 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
769 /* devid subset filter [pstart..pend) */
773 /* btrfs virtual address space subset filter [vstart..vend) */
778 * profile to convert to, single is denoted by
779 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
783 /* BTRFS_BALANCE_ARGS_* */
787 } __attribute__ ((__packed__
));
790 * store balance parameters to disk so that balance can be properly
791 * resumed after crash or unmount
793 struct btrfs_balance_item
{
794 /* BTRFS_BALANCE_* */
797 struct btrfs_disk_balance_args data
;
798 struct btrfs_disk_balance_args meta
;
799 struct btrfs_disk_balance_args sys
;
802 } __attribute__ ((__packed__
));
804 #define BTRFS_FILE_EXTENT_INLINE 0
805 #define BTRFS_FILE_EXTENT_REG 1
806 #define BTRFS_FILE_EXTENT_PREALLOC 2
808 struct btrfs_file_extent_item
{
810 * transaction id that created this extent
814 * max number of bytes to hold this extent in ram
815 * when we split a compressed extent we can't know how big
816 * each of the resulting pieces will be. So, this is
817 * an upper limit on the size of the extent in ram instead of
823 * 32 bits for the various ways we might encode the data,
824 * including compression and encryption. If any of these
825 * are set to something a given disk format doesn't understand
826 * it is treated like an incompat flag for reading and writing,
831 __le16 other_encoding
; /* spare for later use */
833 /* are we inline data or a real extent? */
837 * disk space consumed by the extent, checksum blocks are included
841 __le64 disk_num_bytes
;
843 * the logical offset in file blocks (no csums)
844 * this extent record is for. This allows a file extent to point
845 * into the middle of an existing extent on disk, sharing it
846 * between two snapshots (useful if some bytes in the middle of the
847 * extent have changed
851 * the logical number of file blocks (no csums included). This
852 * always reflects the size uncompressed and without encoding.
856 } __attribute__ ((__packed__
));
858 struct btrfs_csum_item
{
860 } __attribute__ ((__packed__
));
862 struct btrfs_dev_stats_item
{
864 * grow this item struct at the end for future enhancements and keep
865 * the existing values unchanged
867 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
868 } __attribute__ ((__packed__
));
870 /* different types of block groups (and chunks) */
871 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
872 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
873 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
874 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
875 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
876 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
877 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
878 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
879 #define BTRFS_NR_RAID_TYPES 5
881 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
882 BTRFS_BLOCK_GROUP_SYSTEM | \
883 BTRFS_BLOCK_GROUP_METADATA)
885 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
886 BTRFS_BLOCK_GROUP_RAID1 | \
887 BTRFS_BLOCK_GROUP_DUP | \
888 BTRFS_BLOCK_GROUP_RAID10)
890 * We need a bit for restriper to be able to tell when chunks of type
891 * SINGLE are available. This "extended" profile format is used in
892 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
893 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
894 * to avoid remappings between two formats in future.
896 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
898 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
899 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
901 static inline u64
chunk_to_extended(u64 flags
)
903 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
904 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
908 static inline u64
extended_to_chunk(u64 flags
)
910 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
913 struct btrfs_block_group_item
{
915 __le64 chunk_objectid
;
917 } __attribute__ ((__packed__
));
920 * is subvolume quota turned on?
922 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
924 * SCANNING is set during the initialization phase
926 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
928 * Some qgroup entries are known to be out of date,
929 * either because the configuration has changed in a way that
930 * makes a rescan necessary, or because the fs has been mounted
931 * with a non-qgroup-aware version.
932 * Turning qouta off and on again makes it inconsistent, too.
934 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
936 #define BTRFS_QGROUP_STATUS_VERSION 1
938 struct btrfs_qgroup_status_item
{
941 * the generation is updated during every commit. As older
942 * versions of btrfs are not aware of qgroups, it will be
943 * possible to detect inconsistencies by checking the
944 * generation on mount time
948 /* flag definitions see above */
952 * only used during scanning to record the progress
953 * of the scan. It contains a logical address
956 } __attribute__ ((__packed__
));
958 struct btrfs_qgroup_info_item
{
964 } __attribute__ ((__packed__
));
966 /* flags definition for qgroup limits */
967 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
968 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
969 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
970 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
971 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
972 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
974 struct btrfs_qgroup_limit_item
{
976 * only updated when any of the other values change
983 } __attribute__ ((__packed__
));
985 struct btrfs_space_info
{
988 u64 total_bytes
; /* total bytes in the space,
989 this doesn't take mirrors into account */
990 u64 bytes_used
; /* total bytes used,
991 this doesn't take mirrors into account */
992 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
993 transaction finishes */
994 u64 bytes_reserved
; /* total bytes the allocator has reserved for
995 current allocations */
996 u64 bytes_readonly
; /* total bytes that are read only */
998 u64 bytes_may_use
; /* number of bytes that may be used for
999 delalloc/allocations */
1000 u64 disk_used
; /* total bytes used on disk */
1001 u64 disk_total
; /* total bytes on disk, takes mirrors into
1005 * we bump reservation progress every time we decrement
1006 * bytes_reserved. This way people waiting for reservations
1007 * know something good has happened and they can check
1008 * for progress. The number here isn't to be trusted, it
1009 * just shows reclaim activity
1011 unsigned long reservation_progress
;
1013 unsigned int full
:1; /* indicates that we cannot allocate any more
1014 chunks for this space */
1015 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1017 unsigned int flush
:1; /* set if we are trying to make space */
1019 unsigned int force_alloc
; /* set if we need to force a chunk
1020 alloc for this space */
1022 struct list_head list
;
1024 /* for block groups in our same type */
1025 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1027 struct rw_semaphore groups_sem
;
1028 wait_queue_head_t wait
;
1031 struct btrfs_block_rsv
{
1034 struct btrfs_space_info
*space_info
;
1040 * free clusters are used to claim free space in relatively large chunks,
1041 * allowing us to do less seeky writes. They are used for all metadata
1042 * allocations and data allocations in ssd mode.
1044 struct btrfs_free_cluster
{
1046 spinlock_t refill_lock
;
1047 struct rb_root root
;
1049 /* largest extent in this cluster */
1052 /* first extent starting offset */
1055 struct btrfs_block_group_cache
*block_group
;
1057 * when a cluster is allocated from a block group, we put the
1058 * cluster onto a list in the block group so that it can
1059 * be freed before the block group is freed.
1061 struct list_head block_group_list
;
1064 enum btrfs_caching_type
{
1066 BTRFS_CACHE_STARTED
= 1,
1067 BTRFS_CACHE_FAST
= 2,
1068 BTRFS_CACHE_FINISHED
= 3,
1071 enum btrfs_disk_cache_state
{
1072 BTRFS_DC_WRITTEN
= 0,
1076 BTRFS_DC_NEED_WRITE
= 4,
1079 struct btrfs_caching_control
{
1080 struct list_head list
;
1082 wait_queue_head_t wait
;
1083 struct btrfs_work work
;
1084 struct btrfs_block_group_cache
*block_group
;
1089 struct btrfs_block_group_cache
{
1090 struct btrfs_key key
;
1091 struct btrfs_block_group_item item
;
1092 struct btrfs_fs_info
*fs_info
;
1093 struct inode
*inode
;
1100 u64 cache_generation
;
1102 unsigned int dirty
:1;
1103 unsigned int iref
:1;
1105 int disk_cache_state
;
1107 /* cache tracking stuff */
1109 struct btrfs_caching_control
*caching_ctl
;
1110 u64 last_byte_to_unpin
;
1112 struct btrfs_space_info
*space_info
;
1114 /* free space cache stuff */
1115 struct btrfs_free_space_ctl
*free_space_ctl
;
1117 /* block group cache stuff */
1118 struct rb_node cache_node
;
1120 /* for block groups in the same raid type */
1121 struct list_head list
;
1126 /* List of struct btrfs_free_clusters for this block group.
1127 * Today it will only have one thing on it, but that may change
1129 struct list_head cluster_list
;
1132 /* delayed seq elem */
1134 struct list_head list
;
1139 struct reloc_control
;
1140 struct btrfs_device
;
1141 struct btrfs_fs_devices
;
1142 struct btrfs_balance_control
;
1143 struct btrfs_delayed_root
;
1144 struct btrfs_fs_info
{
1145 u8 fsid
[BTRFS_FSID_SIZE
];
1146 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1147 struct btrfs_root
*extent_root
;
1148 struct btrfs_root
*tree_root
;
1149 struct btrfs_root
*chunk_root
;
1150 struct btrfs_root
*dev_root
;
1151 struct btrfs_root
*fs_root
;
1152 struct btrfs_root
*csum_root
;
1153 struct btrfs_root
*quota_root
;
1155 /* the log root tree is a directory of all the other log roots */
1156 struct btrfs_root
*log_root_tree
;
1158 spinlock_t fs_roots_radix_lock
;
1159 struct radix_tree_root fs_roots_radix
;
1161 /* block group cache stuff */
1162 spinlock_t block_group_cache_lock
;
1163 struct rb_root block_group_cache_tree
;
1165 /* keep track of unallocated space */
1166 spinlock_t free_chunk_lock
;
1167 u64 free_chunk_space
;
1169 struct extent_io_tree freed_extents
[2];
1170 struct extent_io_tree
*pinned_extents
;
1172 /* logical->physical extent mapping */
1173 struct btrfs_mapping_tree mapping_tree
;
1176 * block reservation for extent, checksum, root tree and
1177 * delayed dir index item
1179 struct btrfs_block_rsv global_block_rsv
;
1180 /* block reservation for delay allocation */
1181 struct btrfs_block_rsv delalloc_block_rsv
;
1182 /* block reservation for metadata operations */
1183 struct btrfs_block_rsv trans_block_rsv
;
1184 /* block reservation for chunk tree */
1185 struct btrfs_block_rsv chunk_block_rsv
;
1186 /* block reservation for delayed operations */
1187 struct btrfs_block_rsv delayed_block_rsv
;
1189 struct btrfs_block_rsv empty_block_rsv
;
1192 u64 last_trans_committed
;
1195 * this is updated to the current trans every time a full commit
1196 * is required instead of the faster short fsync log commits
1198 u64 last_trans_log_full_commit
;
1199 unsigned long mount_opt
;
1200 unsigned long compress_type
:4;
1203 struct btrfs_transaction
*running_transaction
;
1204 wait_queue_head_t transaction_throttle
;
1205 wait_queue_head_t transaction_wait
;
1206 wait_queue_head_t transaction_blocked_wait
;
1207 wait_queue_head_t async_submit_wait
;
1209 struct btrfs_super_block
*super_copy
;
1210 struct btrfs_super_block
*super_for_commit
;
1211 struct block_device
*__bdev
;
1212 struct super_block
*sb
;
1213 struct inode
*btree_inode
;
1214 struct backing_dev_info bdi
;
1215 struct mutex tree_log_mutex
;
1216 struct mutex transaction_kthread_mutex
;
1217 struct mutex cleaner_mutex
;
1218 struct mutex chunk_mutex
;
1219 struct mutex volume_mutex
;
1221 * this protects the ordered operations list only while we are
1222 * processing all of the entries on it. This way we make
1223 * sure the commit code doesn't find the list temporarily empty
1224 * because another function happens to be doing non-waiting preflush
1225 * before jumping into the main commit.
1227 struct mutex ordered_operations_mutex
;
1228 struct rw_semaphore extent_commit_sem
;
1230 struct rw_semaphore cleanup_work_sem
;
1232 struct rw_semaphore subvol_sem
;
1233 struct srcu_struct subvol_srcu
;
1235 spinlock_t trans_lock
;
1237 * the reloc mutex goes with the trans lock, it is taken
1238 * during commit to protect us from the relocation code
1240 struct mutex reloc_mutex
;
1242 struct list_head trans_list
;
1243 struct list_head hashers
;
1244 struct list_head dead_roots
;
1245 struct list_head caching_block_groups
;
1247 spinlock_t delayed_iput_lock
;
1248 struct list_head delayed_iputs
;
1250 /* this protects tree_mod_seq_list */
1251 spinlock_t tree_mod_seq_lock
;
1252 atomic_t tree_mod_seq
;
1253 struct list_head tree_mod_seq_list
;
1254 struct seq_list tree_mod_seq_elem
;
1255 wait_queue_head_t tree_mod_seq_wait
;
1257 /* this protects tree_mod_log */
1258 rwlock_t tree_mod_log_lock
;
1259 struct rb_root tree_mod_log
;
1261 atomic_t nr_async_submits
;
1262 atomic_t async_submit_draining
;
1263 atomic_t nr_async_bios
;
1264 atomic_t async_delalloc_pages
;
1265 atomic_t open_ioctl_trans
;
1268 * this is used by the balancing code to wait for all the pending
1271 spinlock_t ordered_extent_lock
;
1274 * all of the data=ordered extents pending writeback
1275 * these can span multiple transactions and basically include
1276 * every dirty data page that isn't from nodatacow
1278 struct list_head ordered_extents
;
1281 * all of the inodes that have delalloc bytes. It is possible for
1282 * this list to be empty even when there is still dirty data=ordered
1283 * extents waiting to finish IO.
1285 struct list_head delalloc_inodes
;
1288 * special rename and truncate targets that must be on disk before
1289 * we're allowed to commit. This is basically the ext3 style
1290 * data=ordered list.
1292 struct list_head ordered_operations
;
1295 * there is a pool of worker threads for checksumming during writes
1296 * and a pool for checksumming after reads. This is because readers
1297 * can run with FS locks held, and the writers may be waiting for
1298 * those locks. We don't want ordering in the pending list to cause
1299 * deadlocks, and so the two are serviced separately.
1301 * A third pool does submit_bio to avoid deadlocking with the other
1304 struct btrfs_workers generic_worker
;
1305 struct btrfs_workers workers
;
1306 struct btrfs_workers delalloc_workers
;
1307 struct btrfs_workers endio_workers
;
1308 struct btrfs_workers endio_meta_workers
;
1309 struct btrfs_workers endio_meta_write_workers
;
1310 struct btrfs_workers endio_write_workers
;
1311 struct btrfs_workers endio_freespace_worker
;
1312 struct btrfs_workers submit_workers
;
1313 struct btrfs_workers caching_workers
;
1314 struct btrfs_workers readahead_workers
;
1317 * fixup workers take dirty pages that didn't properly go through
1318 * the cow mechanism and make them safe to write. It happens
1319 * for the sys_munmap function call path
1321 struct btrfs_workers fixup_workers
;
1322 struct btrfs_workers delayed_workers
;
1323 struct task_struct
*transaction_kthread
;
1324 struct task_struct
*cleaner_kthread
;
1325 int thread_pool_size
;
1327 struct kobject super_kobj
;
1328 struct completion kobj_unregister
;
1331 int log_root_recovering
;
1337 /* protected by the delalloc lock, used to keep from writing
1338 * metadata until there is a nice batch
1340 u64 dirty_metadata_bytes
;
1341 struct list_head dirty_cowonly_roots
;
1343 struct btrfs_fs_devices
*fs_devices
;
1346 * the space_info list is almost entirely read only. It only changes
1347 * when we add a new raid type to the FS, and that happens
1348 * very rarely. RCU is used to protect it.
1350 struct list_head space_info
;
1352 struct btrfs_space_info
*data_sinfo
;
1354 struct reloc_control
*reloc_ctl
;
1356 spinlock_t delalloc_lock
;
1359 /* data_alloc_cluster is only used in ssd mode */
1360 struct btrfs_free_cluster data_alloc_cluster
;
1362 /* all metadata allocations go through this cluster */
1363 struct btrfs_free_cluster meta_alloc_cluster
;
1365 /* auto defrag inodes go here */
1366 spinlock_t defrag_inodes_lock
;
1367 struct rb_root defrag_inodes
;
1368 atomic_t defrag_running
;
1370 spinlock_t ref_cache_lock
;
1371 u64 total_ref_cache_size
;
1374 * these three are in extended format (availability of single
1375 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1376 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1378 u64 avail_data_alloc_bits
;
1379 u64 avail_metadata_alloc_bits
;
1380 u64 avail_system_alloc_bits
;
1382 /* restriper state */
1383 spinlock_t balance_lock
;
1384 struct mutex balance_mutex
;
1385 atomic_t balance_running
;
1386 atomic_t balance_pause_req
;
1387 atomic_t balance_cancel_req
;
1388 struct btrfs_balance_control
*balance_ctl
;
1389 wait_queue_head_t balance_wait_q
;
1391 unsigned data_chunk_allocations
;
1392 unsigned metadata_ratio
;
1396 /* private scrub information */
1397 struct mutex scrub_lock
;
1398 atomic_t scrubs_running
;
1399 atomic_t scrub_pause_req
;
1400 atomic_t scrubs_paused
;
1401 atomic_t scrub_cancel_req
;
1402 wait_queue_head_t scrub_pause_wait
;
1403 struct rw_semaphore scrub_super_lock
;
1404 int scrub_workers_refcnt
;
1405 struct btrfs_workers scrub_workers
;
1407 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1408 u32 check_integrity_print_mask
;
1413 unsigned int quota_enabled
:1;
1416 * quota_enabled only changes state after a commit. This holds the
1419 unsigned int pending_quota_state
:1;
1421 /* is qgroup tracking in a consistent state? */
1424 /* holds configuration and tracking. Protected by qgroup_lock */
1425 struct rb_root qgroup_tree
;
1426 spinlock_t qgroup_lock
;
1428 /* list of dirty qgroups to be written at next commit */
1429 struct list_head dirty_qgroups
;
1431 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1434 /* filesystem state */
1437 struct btrfs_delayed_root
*delayed_root
;
1439 /* readahead tree */
1440 spinlock_t reada_lock
;
1441 struct radix_tree_root reada_tree
;
1443 /* next backup root to be overwritten */
1444 int backup_root_index
;
1448 * in ram representation of the tree. extent_root is used for all allocations
1449 * and for the extent tree extent_root root.
1452 struct extent_buffer
*node
;
1454 struct extent_buffer
*commit_root
;
1455 struct btrfs_root
*log_root
;
1456 struct btrfs_root
*reloc_root
;
1458 struct btrfs_root_item root_item
;
1459 struct btrfs_key root_key
;
1460 struct btrfs_fs_info
*fs_info
;
1461 struct extent_io_tree dirty_log_pages
;
1463 struct kobject root_kobj
;
1464 struct completion kobj_unregister
;
1465 struct mutex objectid_mutex
;
1467 spinlock_t accounting_lock
;
1468 struct btrfs_block_rsv
*block_rsv
;
1470 /* free ino cache stuff */
1471 struct mutex fs_commit_mutex
;
1472 struct btrfs_free_space_ctl
*free_ino_ctl
;
1473 enum btrfs_caching_type cached
;
1474 spinlock_t cache_lock
;
1475 wait_queue_head_t cache_wait
;
1476 struct btrfs_free_space_ctl
*free_ino_pinned
;
1478 struct inode
*cache_inode
;
1480 struct mutex log_mutex
;
1481 wait_queue_head_t log_writer_wait
;
1482 wait_queue_head_t log_commit_wait
[2];
1483 atomic_t log_writers
;
1484 atomic_t log_commit
[2];
1485 unsigned long log_transid
;
1486 unsigned long last_log_commit
;
1487 unsigned long log_batch
;
1488 pid_t log_start_pid
;
1489 bool log_multiple_pids
;
1494 /* data allocations are done in sectorsize units */
1497 /* node allocations are done in nodesize units */
1500 /* leaf allocations are done in leafsize units */
1507 u64 highest_objectid
;
1509 /* btrfs_record_root_in_trans is a multi-step process,
1510 * and it can race with the balancing code. But the
1511 * race is very small, and only the first time the root
1512 * is added to each transaction. So in_trans_setup
1513 * is used to tell us when more checks are required
1515 unsigned long in_trans_setup
;
1520 u64 defrag_trans_start
;
1521 struct btrfs_key defrag_progress
;
1522 struct btrfs_key defrag_max
;
1526 /* the dirty list is only used by non-reference counted roots */
1527 struct list_head dirty_list
;
1529 struct list_head root_list
;
1531 spinlock_t orphan_lock
;
1532 atomic_t orphan_inodes
;
1533 struct btrfs_block_rsv
*orphan_block_rsv
;
1534 int orphan_item_inserted
;
1535 int orphan_cleanup_state
;
1537 spinlock_t inode_lock
;
1538 /* red-black tree that keeps track of in-memory inodes */
1539 struct rb_root inode_tree
;
1542 * radix tree that keeps track of delayed nodes of every inode,
1543 * protected by inode_lock
1545 struct radix_tree_root delayed_nodes_tree
;
1547 * right now this just gets used so that a root has its own devid
1548 * for stat. It may be used for more later
1554 spinlock_t root_times_lock
;
1557 struct btrfs_ioctl_defrag_range_args
{
1558 /* start of the defrag operation */
1561 /* number of bytes to defrag, use (u64)-1 to say all */
1565 * flags for the operation, which can include turning
1566 * on compression for this one defrag
1571 * any extent bigger than this will be considered
1572 * already defragged. Use 0 to take the kernel default
1573 * Use 1 to say every single extent must be rewritten
1575 __u32 extent_thresh
;
1578 * which compression method to use if turning on compression
1579 * for this defrag operation. If unspecified, zlib will
1582 __u32 compress_type
;
1584 /* spare for later */
1590 * inode items have the data typically returned from stat and store other
1591 * info about object characteristics. There is one for every file and dir in
1594 #define BTRFS_INODE_ITEM_KEY 1
1595 #define BTRFS_INODE_REF_KEY 12
1596 #define BTRFS_XATTR_ITEM_KEY 24
1597 #define BTRFS_ORPHAN_ITEM_KEY 48
1598 /* reserve 2-15 close to the inode for later flexibility */
1601 * dir items are the name -> inode pointers in a directory. There is one
1602 * for every name in a directory.
1604 #define BTRFS_DIR_LOG_ITEM_KEY 60
1605 #define BTRFS_DIR_LOG_INDEX_KEY 72
1606 #define BTRFS_DIR_ITEM_KEY 84
1607 #define BTRFS_DIR_INDEX_KEY 96
1609 * extent data is for file data
1611 #define BTRFS_EXTENT_DATA_KEY 108
1614 * extent csums are stored in a separate tree and hold csums for
1615 * an entire extent on disk.
1617 #define BTRFS_EXTENT_CSUM_KEY 128
1620 * root items point to tree roots. They are typically in the root
1621 * tree used by the super block to find all the other trees
1623 #define BTRFS_ROOT_ITEM_KEY 132
1626 * root backrefs tie subvols and snapshots to the directory entries that
1629 #define BTRFS_ROOT_BACKREF_KEY 144
1632 * root refs make a fast index for listing all of the snapshots and
1633 * subvolumes referenced by a given root. They point directly to the
1634 * directory item in the root that references the subvol
1636 #define BTRFS_ROOT_REF_KEY 156
1639 * extent items are in the extent map tree. These record which blocks
1640 * are used, and how many references there are to each block
1642 #define BTRFS_EXTENT_ITEM_KEY 168
1644 #define BTRFS_TREE_BLOCK_REF_KEY 176
1646 #define BTRFS_EXTENT_DATA_REF_KEY 178
1648 #define BTRFS_EXTENT_REF_V0_KEY 180
1650 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1652 #define BTRFS_SHARED_DATA_REF_KEY 184
1655 * block groups give us hints into the extent allocation trees. Which
1656 * blocks are free etc etc
1658 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1660 #define BTRFS_DEV_EXTENT_KEY 204
1661 #define BTRFS_DEV_ITEM_KEY 216
1662 #define BTRFS_CHUNK_ITEM_KEY 228
1665 * Records the overall state of the qgroups.
1666 * There's only one instance of this key present,
1667 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1669 #define BTRFS_QGROUP_STATUS_KEY 240
1671 * Records the currently used space of the qgroup.
1672 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1674 #define BTRFS_QGROUP_INFO_KEY 242
1676 * Contains the user configured limits for the qgroup.
1677 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1679 #define BTRFS_QGROUP_LIMIT_KEY 244
1681 * Records the child-parent relationship of qgroups. For
1682 * each relation, 2 keys are present:
1683 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1684 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1686 #define BTRFS_QGROUP_RELATION_KEY 246
1688 #define BTRFS_BALANCE_ITEM_KEY 248
1691 * Persistantly stores the io stats in the device tree.
1692 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1694 #define BTRFS_DEV_STATS_KEY 249
1697 * string items are for debugging. They just store a short string of
1700 #define BTRFS_STRING_ITEM_KEY 253
1703 * Flags for mount options.
1705 * Note: don't forget to add new options to btrfs_show_options()
1707 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1708 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1709 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1710 #define BTRFS_MOUNT_SSD (1 << 3)
1711 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1712 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1713 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1714 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1715 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1716 #define BTRFS_MOUNT_NOSSD (1 << 9)
1717 #define BTRFS_MOUNT_DISCARD (1 << 10)
1718 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1719 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1720 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1721 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1722 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1723 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1724 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1725 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1726 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1727 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1728 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1729 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1731 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1732 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1733 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1738 #define BTRFS_INODE_NODATASUM (1 << 0)
1739 #define BTRFS_INODE_NODATACOW (1 << 1)
1740 #define BTRFS_INODE_READONLY (1 << 2)
1741 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1742 #define BTRFS_INODE_PREALLOC (1 << 4)
1743 #define BTRFS_INODE_SYNC (1 << 5)
1744 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1745 #define BTRFS_INODE_APPEND (1 << 7)
1746 #define BTRFS_INODE_NODUMP (1 << 8)
1747 #define BTRFS_INODE_NOATIME (1 << 9)
1748 #define BTRFS_INODE_DIRSYNC (1 << 10)
1749 #define BTRFS_INODE_COMPRESS (1 << 11)
1751 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1753 struct btrfs_map_token
{
1754 struct extent_buffer
*eb
;
1756 unsigned long offset
;
1759 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1761 memset(token
, 0, sizeof(*token
));
1764 /* some macros to generate set/get funcs for the struct fields. This
1765 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1768 #define le8_to_cpu(v) (v)
1769 #define cpu_to_le8(v) (v)
1772 #define read_eb_member(eb, ptr, type, member, result) ( \
1773 read_extent_buffer(eb, (char *)(result), \
1774 ((unsigned long)(ptr)) + \
1775 offsetof(type, member), \
1776 sizeof(((type *)0)->member)))
1778 #define write_eb_member(eb, ptr, type, member, result) ( \
1779 write_extent_buffer(eb, (char *)(result), \
1780 ((unsigned long)(ptr)) + \
1781 offsetof(type, member), \
1782 sizeof(((type *)0)->member)))
1784 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1785 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1786 unsigned long off, \
1787 struct btrfs_map_token *token); \
1788 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1789 unsigned long off, u##bits val, \
1790 struct btrfs_map_token *token); \
1791 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1792 unsigned long off) \
1794 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1796 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1797 unsigned long off, u##bits val) \
1799 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1802 DECLARE_BTRFS_SETGET_BITS(8)
1803 DECLARE_BTRFS_SETGET_BITS(16)
1804 DECLARE_BTRFS_SETGET_BITS(32)
1805 DECLARE_BTRFS_SETGET_BITS(64)
1807 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1808 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1810 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1811 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1813 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1816 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1817 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1819 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1820 struct btrfs_map_token *token) \
1822 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1823 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1825 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1826 type *s, u##bits val, \
1827 struct btrfs_map_token *token) \
1829 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1830 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1833 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1834 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1836 type *p = page_address(eb->pages[0]); \
1837 u##bits res = le##bits##_to_cpu(p->member); \
1840 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1843 type *p = page_address(eb->pages[0]); \
1844 p->member = cpu_to_le##bits(val); \
1847 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1848 static inline u##bits btrfs_##name(type *s) \
1850 return le##bits##_to_cpu(s->member); \
1852 static inline void btrfs_set_##name(type *s, u##bits val) \
1854 s->member = cpu_to_le##bits(val); \
1857 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1858 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1859 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1860 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1861 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1862 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1864 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1865 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1866 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1867 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1868 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1869 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1871 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1872 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1874 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1876 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1878 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1880 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1882 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1883 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1885 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1887 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1889 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1892 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1894 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1897 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1899 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1902 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1903 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1904 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1905 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1906 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1907 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1908 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1909 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1910 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1911 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1912 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1914 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1916 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1919 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1920 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1921 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1923 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1925 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1927 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1929 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1930 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1932 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1934 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1935 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1937 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1940 unsigned long offset
= (unsigned long)c
;
1941 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1942 offset
+= nr
* sizeof(struct btrfs_stripe
);
1943 return (struct btrfs_stripe
*)offset
;
1946 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1948 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1951 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1952 struct btrfs_chunk
*c
, int nr
)
1954 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1957 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1958 struct btrfs_chunk
*c
, int nr
)
1960 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1963 /* struct btrfs_block_group_item */
1964 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1966 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1968 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1969 struct btrfs_block_group_item
, chunk_objectid
, 64);
1971 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1972 struct btrfs_block_group_item
, chunk_objectid
, 64);
1973 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1974 struct btrfs_block_group_item
, flags
, 64);
1975 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1976 struct btrfs_block_group_item
, flags
, 64);
1978 /* struct btrfs_inode_ref */
1979 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1980 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1982 /* struct btrfs_inode_item */
1983 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1984 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1985 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1986 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1987 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1988 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1989 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1990 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1991 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1992 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1993 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1994 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1996 static inline struct btrfs_timespec
*
1997 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1999 unsigned long ptr
= (unsigned long)inode_item
;
2000 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2001 return (struct btrfs_timespec
*)ptr
;
2004 static inline struct btrfs_timespec
*
2005 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2007 unsigned long ptr
= (unsigned long)inode_item
;
2008 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2009 return (struct btrfs_timespec
*)ptr
;
2012 static inline struct btrfs_timespec
*
2013 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2015 unsigned long ptr
= (unsigned long)inode_item
;
2016 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2017 return (struct btrfs_timespec
*)ptr
;
2020 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2021 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2023 /* struct btrfs_dev_extent */
2024 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2026 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2027 chunk_objectid
, 64);
2028 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2030 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2032 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2034 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2035 return (u8
*)((unsigned long)dev
+ ptr
);
2038 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2039 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2041 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2043 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2046 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2048 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2049 struct btrfs_tree_block_info
*item
,
2050 struct btrfs_disk_key
*key
)
2052 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2055 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2056 struct btrfs_tree_block_info
*item
,
2057 struct btrfs_disk_key
*key
)
2059 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2062 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2064 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2066 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2068 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2071 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2074 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2076 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2079 static inline u32
btrfs_extent_inline_ref_size(int type
)
2081 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2082 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2083 return sizeof(struct btrfs_extent_inline_ref
);
2084 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2085 return sizeof(struct btrfs_shared_data_ref
) +
2086 sizeof(struct btrfs_extent_inline_ref
);
2087 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2088 return sizeof(struct btrfs_extent_data_ref
) +
2089 offsetof(struct btrfs_extent_inline_ref
, offset
);
2094 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2095 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2097 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2098 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2100 /* struct btrfs_node */
2101 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2102 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2104 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2107 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2108 sizeof(struct btrfs_key_ptr
) * nr
;
2109 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2112 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2116 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2117 sizeof(struct btrfs_key_ptr
) * nr
;
2118 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2121 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2124 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2125 sizeof(struct btrfs_key_ptr
) * nr
;
2126 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2129 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2133 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2134 sizeof(struct btrfs_key_ptr
) * nr
;
2135 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2138 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2140 return offsetof(struct btrfs_node
, ptrs
) +
2141 sizeof(struct btrfs_key_ptr
) * nr
;
2144 void btrfs_node_key(struct extent_buffer
*eb
,
2145 struct btrfs_disk_key
*disk_key
, int nr
);
2147 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2148 struct btrfs_disk_key
*disk_key
, int nr
)
2151 ptr
= btrfs_node_key_ptr_offset(nr
);
2152 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2153 struct btrfs_key_ptr
, key
, disk_key
);
2156 /* struct btrfs_item */
2157 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2158 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2160 static inline unsigned long btrfs_item_nr_offset(int nr
)
2162 return offsetof(struct btrfs_leaf
, items
) +
2163 sizeof(struct btrfs_item
) * nr
;
2166 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
2169 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2172 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2173 struct btrfs_item
*item
)
2175 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2178 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2180 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
2183 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2185 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
2188 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2190 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
2193 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2194 struct btrfs_disk_key
*disk_key
, int nr
)
2196 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2197 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2200 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2201 struct btrfs_disk_key
*disk_key
, int nr
)
2203 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2204 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2207 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2210 * struct btrfs_root_ref
2212 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2213 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2214 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2216 /* struct btrfs_dir_item */
2217 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2218 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2219 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2220 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2222 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2223 struct btrfs_dir_item
*item
,
2224 struct btrfs_disk_key
*key
)
2226 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2229 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2230 struct btrfs_dir_item
*item
,
2231 struct btrfs_disk_key
*key
)
2233 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2236 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2238 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2240 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2243 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2244 struct btrfs_free_space_header
*h
,
2245 struct btrfs_disk_key
*key
)
2247 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2250 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2251 struct btrfs_free_space_header
*h
,
2252 struct btrfs_disk_key
*key
)
2254 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2257 /* struct btrfs_disk_key */
2258 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2260 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2261 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2263 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2264 struct btrfs_disk_key
*disk
)
2266 cpu
->offset
= le64_to_cpu(disk
->offset
);
2267 cpu
->type
= disk
->type
;
2268 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2271 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2272 struct btrfs_key
*cpu
)
2274 disk
->offset
= cpu_to_le64(cpu
->offset
);
2275 disk
->type
= cpu
->type
;
2276 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2279 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2280 struct btrfs_key
*key
, int nr
)
2282 struct btrfs_disk_key disk_key
;
2283 btrfs_node_key(eb
, &disk_key
, nr
);
2284 btrfs_disk_key_to_cpu(key
, &disk_key
);
2287 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2288 struct btrfs_key
*key
, int nr
)
2290 struct btrfs_disk_key disk_key
;
2291 btrfs_item_key(eb
, &disk_key
, nr
);
2292 btrfs_disk_key_to_cpu(key
, &disk_key
);
2295 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2296 struct btrfs_dir_item
*item
,
2297 struct btrfs_key
*key
)
2299 struct btrfs_disk_key disk_key
;
2300 btrfs_dir_item_key(eb
, item
, &disk_key
);
2301 btrfs_disk_key_to_cpu(key
, &disk_key
);
2305 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2310 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2315 /* struct btrfs_header */
2316 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2317 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2319 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2320 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2321 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2322 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2324 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2326 return (btrfs_header_flags(eb
) & flag
) == flag
;
2329 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2331 u64 flags
= btrfs_header_flags(eb
);
2332 btrfs_set_header_flags(eb
, flags
| flag
);
2333 return (flags
& flag
) == flag
;
2336 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2338 u64 flags
= btrfs_header_flags(eb
);
2339 btrfs_set_header_flags(eb
, flags
& ~flag
);
2340 return (flags
& flag
) == flag
;
2343 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2345 u64 flags
= btrfs_header_flags(eb
);
2346 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2349 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2352 u64 flags
= btrfs_header_flags(eb
);
2353 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2354 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2355 btrfs_set_header_flags(eb
, flags
);
2358 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2360 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2364 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2366 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2370 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2372 return btrfs_header_level(eb
) == 0;
2375 /* struct btrfs_root_item */
2376 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2378 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2379 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2380 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2382 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2384 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2385 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2386 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2387 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2388 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2389 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2390 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2391 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2393 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2395 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2397 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2399 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2401 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2404 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2406 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2409 /* struct btrfs_root_backup */
2410 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2412 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2414 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2415 tree_root_level
, 8);
2417 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2419 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2420 chunk_root_gen
, 64);
2421 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2422 chunk_root_level
, 8);
2424 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2426 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2427 extent_root_gen
, 64);
2428 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2429 extent_root_level
, 8);
2431 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2433 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2435 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2438 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2440 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2442 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2445 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2447 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2449 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2450 csum_root_level
, 8);
2451 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2453 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2455 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2458 /* struct btrfs_balance_item */
2459 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2461 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2462 struct btrfs_balance_item
*bi
,
2463 struct btrfs_disk_balance_args
*ba
)
2465 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2468 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2469 struct btrfs_balance_item
*bi
,
2470 struct btrfs_disk_balance_args
*ba
)
2472 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2475 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2476 struct btrfs_balance_item
*bi
,
2477 struct btrfs_disk_balance_args
*ba
)
2479 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2482 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2483 struct btrfs_balance_item
*bi
,
2484 struct btrfs_disk_balance_args
*ba
)
2486 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2489 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2490 struct btrfs_balance_item
*bi
,
2491 struct btrfs_disk_balance_args
*ba
)
2493 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2496 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2497 struct btrfs_balance_item
*bi
,
2498 struct btrfs_disk_balance_args
*ba
)
2500 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2504 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2505 struct btrfs_disk_balance_args
*disk
)
2507 memset(cpu
, 0, sizeof(*cpu
));
2509 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2510 cpu
->usage
= le64_to_cpu(disk
->usage
);
2511 cpu
->devid
= le64_to_cpu(disk
->devid
);
2512 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2513 cpu
->pend
= le64_to_cpu(disk
->pend
);
2514 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2515 cpu
->vend
= le64_to_cpu(disk
->vend
);
2516 cpu
->target
= le64_to_cpu(disk
->target
);
2517 cpu
->flags
= le64_to_cpu(disk
->flags
);
2521 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2522 struct btrfs_balance_args
*cpu
)
2524 memset(disk
, 0, sizeof(*disk
));
2526 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2527 disk
->usage
= cpu_to_le64(cpu
->usage
);
2528 disk
->devid
= cpu_to_le64(cpu
->devid
);
2529 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2530 disk
->pend
= cpu_to_le64(cpu
->pend
);
2531 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2532 disk
->vend
= cpu_to_le64(cpu
->vend
);
2533 disk
->target
= cpu_to_le64(cpu
->target
);
2534 disk
->flags
= cpu_to_le64(cpu
->flags
);
2537 /* struct btrfs_super_block */
2538 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2539 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2540 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2542 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2543 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2544 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2545 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2546 struct btrfs_super_block
, chunk_root_generation
, 64);
2547 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2549 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2551 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2552 chunk_root_level
, 8);
2553 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2555 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2556 log_root_transid
, 64);
2557 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2559 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2561 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2563 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2565 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2567 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2569 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2571 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2572 root_dir_objectid
, 64);
2573 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2575 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2577 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2578 compat_ro_flags
, 64);
2579 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2580 incompat_flags
, 64);
2581 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2583 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2584 cache_generation
, 64);
2586 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2588 int t
= btrfs_super_csum_type(s
);
2589 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2590 return btrfs_csum_sizes
[t
];
2593 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2595 return offsetof(struct btrfs_leaf
, items
);
2598 /* struct btrfs_file_extent_item */
2599 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2601 static inline unsigned long
2602 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2604 unsigned long offset
= (unsigned long)e
;
2605 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2609 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2611 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2614 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2616 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2618 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2619 disk_num_bytes
, 64);
2620 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2622 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2624 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2626 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2628 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2630 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2631 other_encoding
, 16);
2633 /* this returns the number of file bytes represented by the inline item.
2634 * If an item is compressed, this is the uncompressed size
2636 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2637 struct btrfs_file_extent_item
*e
)
2639 return btrfs_file_extent_ram_bytes(eb
, e
);
2643 * this returns the number of bytes used by the item on disk, minus the
2644 * size of any extent headers. If a file is compressed on disk, this is
2645 * the compressed size
2647 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2648 struct btrfs_item
*e
)
2650 unsigned long offset
;
2651 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2652 return btrfs_item_size(eb
, e
) - offset
;
2655 /* btrfs_dev_stats_item */
2656 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2657 struct btrfs_dev_stats_item
*ptr
,
2662 read_extent_buffer(eb
, &val
,
2663 offsetof(struct btrfs_dev_stats_item
, values
) +
2664 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2669 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2670 struct btrfs_dev_stats_item
*ptr
,
2673 write_extent_buffer(eb
, &val
,
2674 offsetof(struct btrfs_dev_stats_item
, values
) +
2675 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2679 /* btrfs_qgroup_status_item */
2680 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2682 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2684 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2686 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2689 /* btrfs_qgroup_info_item */
2690 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2692 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2693 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2695 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2696 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2699 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2700 struct btrfs_qgroup_info_item
, generation
, 64);
2701 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2703 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2704 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2705 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2707 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2708 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2710 /* btrfs_qgroup_limit_item */
2711 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2713 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2715 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2717 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2719 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2722 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2724 return sb
->s_fs_info
;
2727 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2730 return root
->leafsize
;
2731 return root
->nodesize
;
2734 /* helper function to cast into the data area of the leaf. */
2735 #define btrfs_item_ptr(leaf, slot, type) \
2736 ((type *)(btrfs_leaf_data(leaf) + \
2737 btrfs_item_offset_nr(leaf, slot)))
2739 #define btrfs_item_ptr_offset(leaf, slot) \
2740 ((unsigned long)(btrfs_leaf_data(leaf) + \
2741 btrfs_item_offset_nr(leaf, slot)))
2743 static inline struct dentry
*fdentry(struct file
*file
)
2745 return file
->f_path
.dentry
;
2748 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2750 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2751 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2754 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2756 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2760 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2763 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2768 * Doing a truncate won't result in new nodes or leaves, just what we need for
2771 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2774 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2778 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2779 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2780 struct btrfs_root
*root
, unsigned long count
);
2781 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2782 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2783 struct btrfs_root
*root
, u64 bytenr
,
2784 u64 num_bytes
, u64
*refs
, u64
*flags
);
2785 int btrfs_pin_extent(struct btrfs_root
*root
,
2786 u64 bytenr
, u64 num
, int reserved
);
2787 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2788 struct btrfs_root
*root
,
2789 u64 bytenr
, u64 num_bytes
);
2790 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2791 struct btrfs_root
*root
,
2792 u64 objectid
, u64 offset
, u64 bytenr
);
2793 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2794 struct btrfs_fs_info
*info
,
2796 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2797 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2798 u64 search_start
, u64 search_hint
, int owner
);
2799 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2800 struct btrfs_root
*root
, u32 blocksize
,
2801 u64 parent
, u64 root_objectid
,
2802 struct btrfs_disk_key
*key
, int level
,
2803 u64 hint
, u64 empty_size
);
2804 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2805 struct btrfs_root
*root
,
2806 struct extent_buffer
*buf
,
2807 u64 parent
, int last_ref
);
2808 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2809 struct btrfs_root
*root
,
2810 u64 bytenr
, u32 blocksize
,
2812 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2813 struct btrfs_root
*root
,
2814 u64 root_objectid
, u64 owner
,
2815 u64 offset
, struct btrfs_key
*ins
);
2816 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2817 struct btrfs_root
*root
,
2818 u64 root_objectid
, u64 owner
, u64 offset
,
2819 struct btrfs_key
*ins
);
2820 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2821 struct btrfs_root
*root
,
2822 u64 num_bytes
, u64 min_alloc_size
,
2823 u64 empty_size
, u64 hint_byte
,
2824 struct btrfs_key
*ins
, u64 data
);
2825 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2826 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2827 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2828 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2829 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2830 struct btrfs_root
*root
,
2831 u64 bytenr
, u64 num_bytes
, u64 flags
,
2833 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2834 struct btrfs_root
*root
,
2835 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2836 u64 owner
, u64 offset
, int for_cow
);
2838 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2839 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2840 u64 start
, u64 len
);
2841 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2842 struct btrfs_root
*root
);
2843 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2844 struct btrfs_root
*root
);
2845 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2846 struct btrfs_root
*root
,
2847 u64 bytenr
, u64 num_bytes
, u64 parent
,
2848 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
2850 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2851 struct btrfs_root
*root
);
2852 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2853 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2854 int btrfs_read_block_groups(struct btrfs_root
*root
);
2855 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2856 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2857 struct btrfs_root
*root
, u64 bytes_used
,
2858 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2860 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2861 struct btrfs_root
*root
, u64 group_start
);
2862 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2863 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2864 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2865 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2866 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2867 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2868 struct btrfs_root
*root
);
2869 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2870 struct inode
*inode
);
2871 void btrfs_orphan_release_metadata(struct inode
*inode
);
2872 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2873 struct btrfs_pending_snapshot
*pending
);
2874 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2875 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2876 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2877 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2878 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2879 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2880 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2881 struct btrfs_block_rsv
*rsv
);
2882 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2883 struct btrfs_block_rsv
*block_rsv
,
2885 int btrfs_block_rsv_add_noflush(struct btrfs_root
*root
,
2886 struct btrfs_block_rsv
*block_rsv
,
2888 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2889 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2890 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2891 struct btrfs_block_rsv
*block_rsv
,
2893 int btrfs_block_rsv_refill_noflush(struct btrfs_root
*root
,
2894 struct btrfs_block_rsv
*block_rsv
,
2896 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2897 struct btrfs_block_rsv
*dst_rsv
,
2899 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2900 struct btrfs_block_rsv
*block_rsv
,
2902 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2903 struct btrfs_block_group_cache
*cache
);
2904 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
2905 struct btrfs_block_group_cache
*cache
);
2906 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2907 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2908 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2909 u64 start
, u64 end
);
2910 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2911 u64 num_bytes
, u64
*actual_bytes
);
2912 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2913 struct btrfs_root
*root
, u64 type
);
2914 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2916 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2917 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2918 struct btrfs_fs_info
*fs_info
);
2920 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2921 int level
, int *slot
);
2922 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2923 int btrfs_previous_item(struct btrfs_root
*root
,
2924 struct btrfs_path
*path
, u64 min_objectid
,
2926 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2927 struct btrfs_root
*root
, struct btrfs_path
*path
,
2928 struct btrfs_key
*new_key
);
2929 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2930 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2931 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2932 struct btrfs_key
*key
, int lowest_level
,
2933 int cache_only
, u64 min_trans
);
2934 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2935 struct btrfs_key
*max_key
,
2936 struct btrfs_path
*path
, int cache_only
,
2938 enum btrfs_compare_tree_result
{
2939 BTRFS_COMPARE_TREE_NEW
,
2940 BTRFS_COMPARE_TREE_DELETED
,
2941 BTRFS_COMPARE_TREE_CHANGED
,
2943 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2944 struct btrfs_root
*right_root
,
2945 struct btrfs_path
*left_path
,
2946 struct btrfs_path
*right_path
,
2947 struct btrfs_key
*key
,
2948 enum btrfs_compare_tree_result result
,
2950 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2951 struct btrfs_root
*right_root
,
2952 btrfs_changed_cb_t cb
, void *ctx
);
2953 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2954 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2955 struct extent_buffer
*parent
, int parent_slot
,
2956 struct extent_buffer
**cow_ret
);
2957 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2958 struct btrfs_root
*root
,
2959 struct extent_buffer
*buf
,
2960 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2961 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2962 struct extent_buffer
*buf
);
2963 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
2964 struct btrfs_root
*root
, struct btrfs_path
*path
,
2966 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2967 struct btrfs_root
*root
,
2968 struct btrfs_path
*path
,
2969 u32 new_size
, int from_end
);
2970 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2971 struct btrfs_root
*root
,
2972 struct btrfs_path
*path
,
2973 struct btrfs_key
*new_key
,
2974 unsigned long split_offset
);
2975 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2976 struct btrfs_root
*root
,
2977 struct btrfs_path
*path
,
2978 struct btrfs_key
*new_key
);
2979 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2980 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2982 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
2983 struct btrfs_path
*p
, u64 time_seq
);
2984 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2985 struct btrfs_key
*key
, struct btrfs_path
*p
,
2986 int find_higher
, int return_any
);
2987 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2988 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2989 int start_slot
, int cache_only
, u64
*last_ret
,
2990 struct btrfs_key
*progress
);
2991 void btrfs_release_path(struct btrfs_path
*p
);
2992 struct btrfs_path
*btrfs_alloc_path(void);
2993 void btrfs_free_path(struct btrfs_path
*p
);
2994 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2995 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2996 struct extent_buffer
*held
, int held_rw
);
2997 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2999 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3000 struct btrfs_path
*path
, int slot
, int nr
);
3001 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3002 struct btrfs_root
*root
,
3003 struct btrfs_path
*path
)
3005 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3008 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
3009 struct btrfs_root
*root
, struct btrfs_path
*path
,
3010 struct btrfs_key
*cpu_key
, u32
*data_size
,
3011 u32 total_data
, u32 total_size
, int nr
);
3012 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3013 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3014 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3015 struct btrfs_root
*root
,
3016 struct btrfs_path
*path
,
3017 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3019 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3020 struct btrfs_root
*root
,
3021 struct btrfs_path
*path
,
3022 struct btrfs_key
*key
,
3025 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3028 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3029 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3031 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3032 struct btrfs_path
*p
, u64 time_seq
)
3035 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3036 return btrfs_next_old_leaf(root
, p
, time_seq
);
3039 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3041 return btrfs_next_old_item(root
, p
, 0);
3043 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3044 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3045 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3046 struct btrfs_block_rsv
*block_rsv
,
3047 int update_ref
, int for_reloc
);
3048 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3049 struct btrfs_root
*root
,
3050 struct extent_buffer
*node
,
3051 struct extent_buffer
*parent
);
3052 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3055 * Get synced with close_ctree()
3058 return fs_info
->closing
;
3060 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3062 kfree(fs_info
->balance_ctl
);
3063 kfree(fs_info
->delayed_root
);
3064 kfree(fs_info
->extent_root
);
3065 kfree(fs_info
->tree_root
);
3066 kfree(fs_info
->chunk_root
);
3067 kfree(fs_info
->dev_root
);
3068 kfree(fs_info
->csum_root
);
3069 kfree(fs_info
->quota_root
);
3070 kfree(fs_info
->super_copy
);
3071 kfree(fs_info
->super_for_commit
);
3075 /* tree mod log functions from ctree.c */
3076 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3077 struct seq_list
*elem
);
3078 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3079 struct seq_list
*elem
);
3080 static inline u64
btrfs_inc_tree_mod_seq(struct btrfs_fs_info
*fs_info
)
3082 return atomic_inc_return(&fs_info
->tree_mod_seq
);
3086 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3087 struct btrfs_path
*path
,
3088 u64 root_id
, u64 ref_id
);
3089 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3090 struct btrfs_root
*tree_root
,
3091 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3092 const char *name
, int name_len
);
3093 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3094 struct btrfs_root
*tree_root
,
3095 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3096 const char *name
, int name_len
);
3097 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3098 struct btrfs_key
*key
);
3099 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3100 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3102 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3103 struct btrfs_root
*root
,
3104 struct btrfs_key
*key
,
3105 struct btrfs_root_item
*item
);
3106 void btrfs_read_root_item(struct btrfs_root
*root
,
3107 struct extent_buffer
*eb
, int slot
,
3108 struct btrfs_root_item
*item
);
3109 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
3110 btrfs_root_item
*item
, struct btrfs_key
*key
);
3111 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
3112 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3113 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3114 struct extent_buffer
*node
);
3115 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3116 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3117 struct btrfs_root
*root
);
3120 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3121 struct btrfs_root
*root
, const char *name
,
3122 int name_len
, struct inode
*dir
,
3123 struct btrfs_key
*location
, u8 type
, u64 index
);
3124 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3125 struct btrfs_root
*root
,
3126 struct btrfs_path
*path
, u64 dir
,
3127 const char *name
, int name_len
,
3129 struct btrfs_dir_item
*
3130 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3131 struct btrfs_root
*root
,
3132 struct btrfs_path
*path
, u64 dir
,
3133 u64 objectid
, const char *name
, int name_len
,
3135 struct btrfs_dir_item
*
3136 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3137 struct btrfs_path
*path
, u64 dirid
,
3138 const char *name
, int name_len
);
3139 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3140 struct btrfs_path
*path
,
3141 const char *name
, int name_len
);
3142 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3143 struct btrfs_root
*root
,
3144 struct btrfs_path
*path
,
3145 struct btrfs_dir_item
*di
);
3146 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3147 struct btrfs_root
*root
,
3148 struct btrfs_path
*path
, u64 objectid
,
3149 const char *name
, u16 name_len
,
3150 const void *data
, u16 data_len
);
3151 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3152 struct btrfs_root
*root
,
3153 struct btrfs_path
*path
, u64 dir
,
3154 const char *name
, u16 name_len
,
3156 int verify_dir_item(struct btrfs_root
*root
,
3157 struct extent_buffer
*leaf
,
3158 struct btrfs_dir_item
*dir_item
);
3161 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3162 struct btrfs_root
*root
, u64 offset
);
3163 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3164 struct btrfs_root
*root
, u64 offset
);
3165 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3168 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3169 struct btrfs_root
*root
,
3170 const char *name
, int name_len
,
3171 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3172 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3173 struct btrfs_root
*root
,
3174 const char *name
, int name_len
,
3175 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3176 struct btrfs_inode_ref
*
3177 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
3178 struct btrfs_root
*root
,
3179 struct btrfs_path
*path
,
3180 const char *name
, int name_len
,
3181 u64 inode_objectid
, u64 ref_objectid
, int mod
);
3182 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3183 struct btrfs_root
*root
,
3184 struct btrfs_path
*path
, u64 objectid
);
3185 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3186 *root
, struct btrfs_path
*path
,
3187 struct btrfs_key
*location
, int mod
);
3190 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3191 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3192 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3193 struct bio
*bio
, u32
*dst
);
3194 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3195 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
3196 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3197 struct btrfs_root
*root
,
3198 u64 objectid
, u64 pos
,
3199 u64 disk_offset
, u64 disk_num_bytes
,
3200 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3201 u8 compression
, u8 encryption
, u16 other_encoding
);
3202 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3203 struct btrfs_root
*root
,
3204 struct btrfs_path
*path
, u64 objectid
,
3205 u64 bytenr
, int mod
);
3206 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3207 struct btrfs_root
*root
,
3208 struct btrfs_ordered_sum
*sums
);
3209 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3210 struct bio
*bio
, u64 file_start
, int contig
);
3211 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
3212 struct btrfs_root
*root
,
3213 struct btrfs_path
*path
,
3214 u64 bytenr
, int cow
);
3215 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
3216 struct btrfs_root
*root
, struct btrfs_path
*path
,
3218 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3219 struct list_head
*list
, int search_commit
);
3221 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3222 size_t pg_offset
, u64 start
, u64 len
,
3225 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3226 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3227 #define ClearPageChecked ClearPageFsMisc
3228 #define SetPageChecked SetPageFsMisc
3229 #define PageChecked PageFsMisc
3232 /* This forces readahead on a given range of bytes in an inode */
3233 static inline void btrfs_force_ra(struct address_space
*mapping
,
3234 struct file_ra_state
*ra
, struct file
*file
,
3235 pgoff_t offset
, unsigned long req_size
)
3237 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3240 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3241 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3242 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3243 struct btrfs_root
*root
,
3244 struct inode
*dir
, struct inode
*inode
,
3245 const char *name
, int name_len
);
3246 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3247 struct inode
*parent_inode
, struct inode
*inode
,
3248 const char *name
, int name_len
, int add_backref
, u64 index
);
3249 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3250 struct btrfs_root
*root
,
3251 struct inode
*dir
, u64 objectid
,
3252 const char *name
, int name_len
);
3253 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3254 struct btrfs_root
*root
,
3255 struct inode
*inode
, u64 new_size
,
3258 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3259 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3260 struct extent_state
**cached_state
);
3261 int btrfs_writepages(struct address_space
*mapping
,
3262 struct writeback_control
*wbc
);
3263 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3264 struct btrfs_root
*new_root
, u64 new_dirid
);
3265 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3266 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
3268 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3269 int btrfs_readpage(struct file
*file
, struct page
*page
);
3270 void btrfs_evict_inode(struct inode
*inode
);
3271 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3272 int btrfs_dirty_inode(struct inode
*inode
);
3273 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3274 void btrfs_destroy_inode(struct inode
*inode
);
3275 int btrfs_drop_inode(struct inode
*inode
);
3276 int btrfs_init_cachep(void);
3277 void btrfs_destroy_cachep(void);
3278 long btrfs_ioctl_trans_end(struct file
*file
);
3279 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3280 struct btrfs_root
*root
, int *was_new
);
3281 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3282 size_t pg_offset
, u64 start
, u64 end
,
3284 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3285 struct btrfs_root
*root
,
3286 struct inode
*inode
);
3287 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3288 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3289 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3290 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3291 struct btrfs_root
*root
);
3292 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3293 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3294 void btrfs_add_delayed_iput(struct inode
*inode
);
3295 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3296 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3297 u64 start
, u64 num_bytes
, u64 min_size
,
3298 loff_t actual_len
, u64
*alloc_hint
);
3299 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3300 struct btrfs_trans_handle
*trans
, int mode
,
3301 u64 start
, u64 num_bytes
, u64 min_size
,
3302 loff_t actual_len
, u64
*alloc_hint
);
3303 extern const struct dentry_operations btrfs_dentry_operations
;
3306 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3307 void btrfs_update_iflags(struct inode
*inode
);
3308 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3309 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3310 struct btrfs_ioctl_defrag_range_args
*range
,
3311 u64 newer_than
, unsigned long max_pages
);
3313 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3314 struct inode
*inode
);
3315 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3316 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3317 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3319 extern const struct file_operations btrfs_file_operations
;
3320 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
3321 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
3322 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3323 struct inode
*inode
, u64 start
, u64 end
);
3324 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3325 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
3326 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3327 struct page
**pages
, size_t num_pages
,
3328 loff_t pos
, size_t write_bytes
,
3329 struct extent_state
**cached
);
3332 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3333 struct btrfs_root
*root
, int cache_only
);
3336 int btrfs_init_sysfs(void);
3337 void btrfs_exit_sysfs(void);
3340 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3343 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3344 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3346 #ifdef CONFIG_PRINTK
3348 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3350 static inline __printf(2, 3)
3351 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3357 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3358 unsigned int line
, int errno
, const char *fmt
, ...);
3361 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3362 struct btrfs_root
*root
, const char *function
,
3363 unsigned int line
, int errno
);
3365 #define btrfs_set_fs_incompat(__fs_info, opt) \
3366 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3368 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3371 struct btrfs_super_block
*disk_super
;
3374 disk_super
= fs_info
->super_copy
;
3375 features
= btrfs_super_incompat_flags(disk_super
);
3376 if (!(features
& flag
)) {
3378 btrfs_set_super_incompat_flags(disk_super
, features
);
3382 #define btrfs_abort_transaction(trans, root, errno) \
3384 __btrfs_abort_transaction(trans, root, __func__, \
3388 #define btrfs_std_error(fs_info, errno) \
3391 __btrfs_std_error((fs_info), __func__, \
3392 __LINE__, (errno), NULL); \
3395 #define btrfs_error(fs_info, errno, fmt, args...) \
3397 __btrfs_std_error((fs_info), __func__, __LINE__, \
3398 (errno), fmt, ##args); \
3402 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3403 unsigned int line
, int errno
, const char *fmt
, ...);
3405 #define btrfs_panic(fs_info, errno, fmt, args...) \
3407 struct btrfs_fs_info *_i = (fs_info); \
3408 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3409 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3413 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3414 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3415 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3416 struct inode
*inode
, struct inode
*dir
);
3417 int btrfs_acl_chmod(struct inode
*inode
);
3419 #define btrfs_get_acl NULL
3420 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3421 struct inode
*inode
, struct inode
*dir
)
3425 static inline int btrfs_acl_chmod(struct inode
*inode
)
3432 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3433 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3434 struct btrfs_root
*root
);
3435 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3436 struct btrfs_root
*root
);
3437 int btrfs_recover_relocation(struct btrfs_root
*root
);
3438 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3439 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3440 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3441 struct extent_buffer
*cow
);
3442 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3443 struct btrfs_pending_snapshot
*pending
,
3444 u64
*bytes_to_reserve
);
3445 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3446 struct btrfs_pending_snapshot
*pending
);
3449 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
3450 struct btrfs_scrub_progress
*progress
, int readonly
);
3451 void btrfs_scrub_pause(struct btrfs_root
*root
);
3452 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3453 void btrfs_scrub_continue(struct btrfs_root
*root
);
3454 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3455 int __btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3456 int btrfs_scrub_cancel(struct btrfs_root
*root
);
3457 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
3458 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3459 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3460 struct btrfs_scrub_progress
*progress
);
3463 struct reada_control
{
3464 struct btrfs_root
*root
; /* tree to prefetch */
3465 struct btrfs_key key_start
;
3466 struct btrfs_key key_end
; /* exclusive */
3469 wait_queue_head_t wait
;
3471 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3472 struct btrfs_key
*start
, struct btrfs_key
*end
);
3473 int btrfs_reada_wait(void *handle
);
3474 void btrfs_reada_detach(void *handle
);
3475 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3476 u64 start
, int err
);
3479 struct qgroup_update
{
3480 struct list_head list
;
3481 struct btrfs_delayed_ref_node
*node
;
3482 struct btrfs_delayed_extent_op
*extent_op
;
3485 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
3486 struct btrfs_fs_info
*fs_info
);
3487 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
3488 struct btrfs_fs_info
*fs_info
);
3489 int btrfs_quota_rescan(struct btrfs_fs_info
*fs_info
);
3490 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
3491 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3492 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
3493 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3494 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
3495 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3497 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
3498 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
3499 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
3500 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3501 struct btrfs_qgroup_limit
*limit
);
3502 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
3503 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
3504 struct btrfs_delayed_extent_op
;
3505 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
3506 struct btrfs_delayed_ref_node
*node
,
3507 struct btrfs_delayed_extent_op
*extent_op
);
3508 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
3509 struct btrfs_fs_info
*fs_info
,
3510 struct btrfs_delayed_ref_node
*node
,
3511 struct btrfs_delayed_extent_op
*extent_op
);
3512 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
3513 struct btrfs_fs_info
*fs_info
);
3514 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
3515 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
3516 struct btrfs_qgroup_inherit
*inherit
);
3517 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
3518 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
3520 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
3522 static inline int is_fstree(u64 rootid
)
3524 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3525 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)