2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include <linux/btrfs.h>
35 #include "extent_io.h"
36 #include "extent_map.h"
37 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 3
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for storing
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
145 #define BTRFS_DEV_REPLACE_DEVID 0
148 * the max metadata block size. This limit is somewhat artificial,
149 * but the memmove costs go through the roof for larger blocks.
151 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
154 * we can actually store much bigger names, but lets not confuse the rest
157 #define BTRFS_NAME_LEN 255
160 * Theoretical limit is larger, but we keep this down to a sane
161 * value. That should limit greatly the possibility of collisions on
164 #define BTRFS_LINK_MAX 65535U
166 /* 32 bytes in various csum fields */
167 #define BTRFS_CSUM_SIZE 32
170 #define BTRFS_CSUM_TYPE_CRC32 0
172 static int btrfs_csum_sizes
[] = { 4, 0 };
174 /* four bytes for CRC32 */
175 #define BTRFS_EMPTY_DIR_SIZE 0
177 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
178 #define REQ_GET_READ_MIRRORS (1 << 30)
180 #define BTRFS_FT_UNKNOWN 0
181 #define BTRFS_FT_REG_FILE 1
182 #define BTRFS_FT_DIR 2
183 #define BTRFS_FT_CHRDEV 3
184 #define BTRFS_FT_BLKDEV 4
185 #define BTRFS_FT_FIFO 5
186 #define BTRFS_FT_SOCK 6
187 #define BTRFS_FT_SYMLINK 7
188 #define BTRFS_FT_XATTR 8
189 #define BTRFS_FT_MAX 9
191 /* ioprio of readahead is set to idle */
192 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
194 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
197 * The key defines the order in the tree, and so it also defines (optimal)
200 * objectid corresponds to the inode number.
202 * type tells us things about the object, and is a kind of stream selector.
203 * so for a given inode, keys with type of 1 might refer to the inode data,
204 * type of 2 may point to file data in the btree and type == 3 may point to
207 * offset is the starting byte offset for this key in the stream.
209 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
210 * in cpu native order. Otherwise they are identical and their sizes
211 * should be the same (ie both packed)
213 struct btrfs_disk_key
{
217 } __attribute__ ((__packed__
));
223 } __attribute__ ((__packed__
));
225 struct btrfs_mapping_tree
{
226 struct extent_map_tree map_tree
;
229 struct btrfs_dev_item
{
230 /* the internal btrfs device id */
233 /* size of the device */
239 /* optimal io alignment for this device */
242 /* optimal io width for this device */
245 /* minimal io size for this device */
248 /* type and info about this device */
251 /* expected generation for this device */
255 * starting byte of this partition on the device,
256 * to allow for stripe alignment in the future
260 /* grouping information for allocation decisions */
263 /* seek speed 0-100 where 100 is fastest */
266 /* bandwidth 0-100 where 100 is fastest */
269 /* btrfs generated uuid for this device */
270 u8 uuid
[BTRFS_UUID_SIZE
];
272 /* uuid of FS who owns this device */
273 u8 fsid
[BTRFS_UUID_SIZE
];
274 } __attribute__ ((__packed__
));
276 struct btrfs_stripe
{
279 u8 dev_uuid
[BTRFS_UUID_SIZE
];
280 } __attribute__ ((__packed__
));
283 /* size of this chunk in bytes */
286 /* objectid of the root referencing this chunk */
292 /* optimal io alignment for this chunk */
295 /* optimal io width for this chunk */
298 /* minimal io size for this chunk */
301 /* 2^16 stripes is quite a lot, a second limit is the size of a single
306 /* sub stripes only matter for raid10 */
308 struct btrfs_stripe stripe
;
309 /* additional stripes go here */
310 } __attribute__ ((__packed__
));
312 #define BTRFS_FREE_SPACE_EXTENT 1
313 #define BTRFS_FREE_SPACE_BITMAP 2
315 struct btrfs_free_space_entry
{
319 } __attribute__ ((__packed__
));
321 struct btrfs_free_space_header
{
322 struct btrfs_disk_key location
;
326 } __attribute__ ((__packed__
));
328 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
330 BUG_ON(num_stripes
== 0);
331 return sizeof(struct btrfs_chunk
) +
332 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
335 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
336 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
341 #define BTRFS_FS_STATE_ERROR 0
343 /* Super block flags */
344 /* Errors detected */
345 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
347 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
348 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
350 #define BTRFS_BACKREF_REV_MAX 256
351 #define BTRFS_BACKREF_REV_SHIFT 56
352 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
353 BTRFS_BACKREF_REV_SHIFT)
355 #define BTRFS_OLD_BACKREF_REV 0
356 #define BTRFS_MIXED_BACKREF_REV 1
359 * every tree block (leaf or node) starts with this header.
361 struct btrfs_header
{
362 /* these first four must match the super block */
363 u8 csum
[BTRFS_CSUM_SIZE
];
364 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
365 __le64 bytenr
; /* which block this node is supposed to live in */
368 /* allowed to be different from the super from here on down */
369 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
374 } __attribute__ ((__packed__
));
376 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
377 sizeof(struct btrfs_header)) / \
378 sizeof(struct btrfs_key_ptr))
379 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
380 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
381 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
382 sizeof(struct btrfs_item) - \
383 sizeof(struct btrfs_file_extent_item))
384 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
385 sizeof(struct btrfs_item) -\
386 sizeof(struct btrfs_dir_item))
390 * this is a very generous portion of the super block, giving us
391 * room to translate 14 chunks with 3 stripes each.
393 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
394 #define BTRFS_LABEL_SIZE 256
397 * just in case we somehow lose the roots and are not able to mount,
398 * we store an array of the roots from previous transactions
401 #define BTRFS_NUM_BACKUP_ROOTS 4
402 struct btrfs_root_backup
{
404 __le64 tree_root_gen
;
407 __le64 chunk_root_gen
;
410 __le64 extent_root_gen
;
419 __le64 csum_root_gen
;
429 u8 extent_root_level
;
433 /* future and to align */
435 } __attribute__ ((__packed__
));
438 * the super block basically lists the main trees of the FS
439 * it currently lacks any block count etc etc
441 struct btrfs_super_block
{
442 u8 csum
[BTRFS_CSUM_SIZE
];
443 /* the first 4 fields must match struct btrfs_header */
444 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
445 __le64 bytenr
; /* this block number */
448 /* allowed to be different from the btrfs_header from here own down */
455 /* this will help find the new super based on the log root */
456 __le64 log_root_transid
;
459 __le64 root_dir_objectid
;
465 __le32 sys_chunk_array_size
;
466 __le64 chunk_root_generation
;
468 __le64 compat_ro_flags
;
469 __le64 incompat_flags
;
474 struct btrfs_dev_item dev_item
;
476 char label
[BTRFS_LABEL_SIZE
];
478 __le64 cache_generation
;
480 /* future expansion */
482 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
483 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
484 } __attribute__ ((__packed__
));
487 * Compat flags that we support. If any incompat flags are set other than the
488 * ones specified below then we will fail to mount
490 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
491 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
492 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
493 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
495 * some patches floated around with a second compression method
496 * lets save that incompat here for when they do get in
497 * Note we don't actually support it, we're just reserving the
500 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
503 * older kernels tried to do bigger metadata blocks, but the
504 * code was pretty buggy. Lets not let them try anymore.
506 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
508 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
510 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
511 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
512 #define BTRFS_FEATURE_INCOMPAT_SUPP \
513 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
514 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
515 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
516 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
517 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
518 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
521 * A leaf is full of items. offset and size tell us where to find
522 * the item in the leaf (relative to the start of the data area)
525 struct btrfs_disk_key key
;
528 } __attribute__ ((__packed__
));
531 * leaves have an item area and a data area:
532 * [item0, item1....itemN] [free space] [dataN...data1, data0]
534 * The data is separate from the items to get the keys closer together
538 struct btrfs_header header
;
539 struct btrfs_item items
[];
540 } __attribute__ ((__packed__
));
543 * all non-leaf blocks are nodes, they hold only keys and pointers to
546 struct btrfs_key_ptr
{
547 struct btrfs_disk_key key
;
550 } __attribute__ ((__packed__
));
553 struct btrfs_header header
;
554 struct btrfs_key_ptr ptrs
[];
555 } __attribute__ ((__packed__
));
558 * btrfs_paths remember the path taken from the root down to the leaf.
559 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
560 * to any other levels that are present.
562 * The slots array records the index of the item or block pointer
563 * used while walking the tree.
566 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
567 int slots
[BTRFS_MAX_LEVEL
];
568 /* if there is real range locking, this locks field will change */
569 int locks
[BTRFS_MAX_LEVEL
];
571 /* keep some upper locks as we walk down */
575 * set by btrfs_split_item, tells search_slot to keep all locks
576 * and to force calls to keep space in the nodes
578 unsigned int search_for_split
:1;
579 unsigned int keep_locks
:1;
580 unsigned int skip_locking
:1;
581 unsigned int leave_spinning
:1;
582 unsigned int search_commit_root
:1;
583 unsigned int really_keep_locks
:1;
587 * items in the extent btree are used to record the objectid of the
588 * owner of the block and the number of references
591 struct btrfs_extent_item
{
595 } __attribute__ ((__packed__
));
597 struct btrfs_extent_item_v0
{
599 } __attribute__ ((__packed__
));
601 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
602 sizeof(struct btrfs_item))
604 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
605 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
607 /* following flags only apply to tree blocks */
609 /* use full backrefs for extent pointers in the block */
610 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
613 * this flag is only used internally by scrub and may be changed at any time
614 * it is only declared here to avoid collisions
616 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
618 struct btrfs_tree_block_info
{
619 struct btrfs_disk_key key
;
621 } __attribute__ ((__packed__
));
623 struct btrfs_extent_data_ref
{
628 } __attribute__ ((__packed__
));
630 struct btrfs_shared_data_ref
{
632 } __attribute__ ((__packed__
));
634 struct btrfs_extent_inline_ref
{
637 } __attribute__ ((__packed__
));
639 /* old style backrefs item */
640 struct btrfs_extent_ref_v0
{
645 } __attribute__ ((__packed__
));
648 /* dev extents record free space on individual devices. The owner
649 * field points back to the chunk allocation mapping tree that allocated
650 * the extent. The chunk tree uuid field is a way to double check the owner
652 struct btrfs_dev_extent
{
654 __le64 chunk_objectid
;
657 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
658 } __attribute__ ((__packed__
));
660 struct btrfs_inode_ref
{
664 } __attribute__ ((__packed__
));
666 struct btrfs_inode_extref
{
667 __le64 parent_objectid
;
672 } __attribute__ ((__packed__
));
674 struct btrfs_timespec
{
677 } __attribute__ ((__packed__
));
679 enum btrfs_compression_type
{
680 BTRFS_COMPRESS_NONE
= 0,
681 BTRFS_COMPRESS_ZLIB
= 1,
682 BTRFS_COMPRESS_LZO
= 2,
683 BTRFS_COMPRESS_TYPES
= 2,
684 BTRFS_COMPRESS_LAST
= 3,
687 struct btrfs_inode_item
{
688 /* nfs style generation number */
690 /* transid that last touched this inode */
702 /* modification sequence number for NFS */
706 * a little future expansion, for more than this we can
707 * just grow the inode item and version it
710 struct btrfs_timespec atime
;
711 struct btrfs_timespec ctime
;
712 struct btrfs_timespec mtime
;
713 struct btrfs_timespec otime
;
714 } __attribute__ ((__packed__
));
716 struct btrfs_dir_log_item
{
718 } __attribute__ ((__packed__
));
720 struct btrfs_dir_item
{
721 struct btrfs_disk_key location
;
726 } __attribute__ ((__packed__
));
728 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
730 struct btrfs_root_item
{
731 struct btrfs_inode_item inode
;
737 __le64 last_snapshot
;
740 struct btrfs_disk_key drop_progress
;
745 * The following fields appear after subvol_uuids+subvol_times
750 * This generation number is used to test if the new fields are valid
751 * and up to date while reading the root item. Everytime the root item
752 * is written out, the "generation" field is copied into this field. If
753 * anyone ever mounted the fs with an older kernel, we will have
754 * mismatching generation values here and thus must invalidate the
755 * new fields. See btrfs_update_root and btrfs_find_last_root for
757 * the offset of generation_v2 is also used as the start for the memset
758 * when invalidating the fields.
760 __le64 generation_v2
;
761 u8 uuid
[BTRFS_UUID_SIZE
];
762 u8 parent_uuid
[BTRFS_UUID_SIZE
];
763 u8 received_uuid
[BTRFS_UUID_SIZE
];
764 __le64 ctransid
; /* updated when an inode changes */
765 __le64 otransid
; /* trans when created */
766 __le64 stransid
; /* trans when sent. non-zero for received subvol */
767 __le64 rtransid
; /* trans when received. non-zero for received subvol */
768 struct btrfs_timespec ctime
;
769 struct btrfs_timespec otime
;
770 struct btrfs_timespec stime
;
771 struct btrfs_timespec rtime
;
772 __le64 reserved
[8]; /* for future */
773 } __attribute__ ((__packed__
));
776 * this is used for both forward and backward root refs
778 struct btrfs_root_ref
{
782 } __attribute__ ((__packed__
));
784 struct btrfs_disk_balance_args
{
786 * profiles to operate on, single is denoted by
787 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
797 /* devid subset filter [pstart..pend) */
801 /* btrfs virtual address space subset filter [vstart..vend) */
806 * profile to convert to, single is denoted by
807 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
811 /* BTRFS_BALANCE_ARGS_* */
815 } __attribute__ ((__packed__
));
818 * store balance parameters to disk so that balance can be properly
819 * resumed after crash or unmount
821 struct btrfs_balance_item
{
822 /* BTRFS_BALANCE_* */
825 struct btrfs_disk_balance_args data
;
826 struct btrfs_disk_balance_args meta
;
827 struct btrfs_disk_balance_args sys
;
830 } __attribute__ ((__packed__
));
832 #define BTRFS_FILE_EXTENT_INLINE 0
833 #define BTRFS_FILE_EXTENT_REG 1
834 #define BTRFS_FILE_EXTENT_PREALLOC 2
836 struct btrfs_file_extent_item
{
838 * transaction id that created this extent
842 * max number of bytes to hold this extent in ram
843 * when we split a compressed extent we can't know how big
844 * each of the resulting pieces will be. So, this is
845 * an upper limit on the size of the extent in ram instead of
851 * 32 bits for the various ways we might encode the data,
852 * including compression and encryption. If any of these
853 * are set to something a given disk format doesn't understand
854 * it is treated like an incompat flag for reading and writing,
859 __le16 other_encoding
; /* spare for later use */
861 /* are we inline data or a real extent? */
865 * disk space consumed by the extent, checksum blocks are included
869 __le64 disk_num_bytes
;
871 * the logical offset in file blocks (no csums)
872 * this extent record is for. This allows a file extent to point
873 * into the middle of an existing extent on disk, sharing it
874 * between two snapshots (useful if some bytes in the middle of the
875 * extent have changed
879 * the logical number of file blocks (no csums included). This
880 * always reflects the size uncompressed and without encoding.
884 } __attribute__ ((__packed__
));
886 struct btrfs_csum_item
{
888 } __attribute__ ((__packed__
));
890 struct btrfs_dev_stats_item
{
892 * grow this item struct at the end for future enhancements and keep
893 * the existing values unchanged
895 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
896 } __attribute__ ((__packed__
));
898 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
899 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
900 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
901 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
902 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
903 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
904 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
906 struct btrfs_dev_replace
{
907 u64 replace_state
; /* see #define above */
908 u64 time_started
; /* seconds since 1-Jan-1970 */
909 u64 time_stopped
; /* seconds since 1-Jan-1970 */
910 atomic64_t num_write_errors
;
911 atomic64_t num_uncorrectable_read_errors
;
914 u64 committed_cursor_left
;
915 u64 cursor_left_last_write_of_item
;
918 u64 cont_reading_from_srcdev_mode
; /* see #define above */
921 int item_needs_writeback
;
922 struct btrfs_device
*srcdev
;
923 struct btrfs_device
*tgtdev
;
926 atomic_t nesting_level
;
927 struct mutex lock_finishing_cancel_unmount
;
928 struct mutex lock_management_lock
;
931 struct btrfs_scrub_progress scrub_progress
;
934 struct btrfs_dev_replace_item
{
936 * grow this item struct at the end for future enhancements and keep
937 * the existing values unchanged
942 __le64 cont_reading_from_srcdev_mode
;
944 __le64 replace_state
;
947 __le64 num_write_errors
;
948 __le64 num_uncorrectable_read_errors
;
949 } __attribute__ ((__packed__
));
951 /* different types of block groups (and chunks) */
952 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
953 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
954 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
955 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
956 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
957 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
958 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
959 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
961 enum btrfs_raid_types
{
970 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
971 BTRFS_BLOCK_GROUP_SYSTEM | \
972 BTRFS_BLOCK_GROUP_METADATA)
974 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
975 BTRFS_BLOCK_GROUP_RAID1 | \
976 BTRFS_BLOCK_GROUP_DUP | \
977 BTRFS_BLOCK_GROUP_RAID10)
979 * We need a bit for restriper to be able to tell when chunks of type
980 * SINGLE are available. This "extended" profile format is used in
981 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
982 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
983 * to avoid remappings between two formats in future.
985 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
987 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
988 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
990 static inline u64
chunk_to_extended(u64 flags
)
992 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
993 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
997 static inline u64
extended_to_chunk(u64 flags
)
999 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1002 struct btrfs_block_group_item
{
1004 __le64 chunk_objectid
;
1006 } __attribute__ ((__packed__
));
1009 * is subvolume quota turned on?
1011 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1013 * SCANNING is set during the initialization phase
1015 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1017 * Some qgroup entries are known to be out of date,
1018 * either because the configuration has changed in a way that
1019 * makes a rescan necessary, or because the fs has been mounted
1020 * with a non-qgroup-aware version.
1021 * Turning qouta off and on again makes it inconsistent, too.
1023 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1025 #define BTRFS_QGROUP_STATUS_VERSION 1
1027 struct btrfs_qgroup_status_item
{
1030 * the generation is updated during every commit. As older
1031 * versions of btrfs are not aware of qgroups, it will be
1032 * possible to detect inconsistencies by checking the
1033 * generation on mount time
1037 /* flag definitions see above */
1041 * only used during scanning to record the progress
1042 * of the scan. It contains a logical address
1045 } __attribute__ ((__packed__
));
1047 struct btrfs_qgroup_info_item
{
1053 } __attribute__ ((__packed__
));
1055 /* flags definition for qgroup limits */
1056 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1057 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1058 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1059 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1060 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1061 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1063 struct btrfs_qgroup_limit_item
{
1065 * only updated when any of the other values change
1072 } __attribute__ ((__packed__
));
1074 struct btrfs_space_info
{
1077 u64 total_bytes
; /* total bytes in the space,
1078 this doesn't take mirrors into account */
1079 u64 bytes_used
; /* total bytes used,
1080 this doesn't take mirrors into account */
1081 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1082 transaction finishes */
1083 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1084 current allocations */
1085 u64 bytes_readonly
; /* total bytes that are read only */
1087 u64 bytes_may_use
; /* number of bytes that may be used for
1088 delalloc/allocations */
1089 u64 disk_used
; /* total bytes used on disk */
1090 u64 disk_total
; /* total bytes on disk, takes mirrors into
1094 * we bump reservation progress every time we decrement
1095 * bytes_reserved. This way people waiting for reservations
1096 * know something good has happened and they can check
1097 * for progress. The number here isn't to be trusted, it
1098 * just shows reclaim activity
1100 unsigned long reservation_progress
;
1102 unsigned int full
:1; /* indicates that we cannot allocate any more
1103 chunks for this space */
1104 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1106 unsigned int flush
:1; /* set if we are trying to make space */
1108 unsigned int force_alloc
; /* set if we need to force a chunk
1109 alloc for this space */
1111 struct list_head list
;
1113 /* for block groups in our same type */
1114 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1116 struct rw_semaphore groups_sem
;
1117 wait_queue_head_t wait
;
1120 #define BTRFS_BLOCK_RSV_GLOBAL 1
1121 #define BTRFS_BLOCK_RSV_DELALLOC 2
1122 #define BTRFS_BLOCK_RSV_TRANS 3
1123 #define BTRFS_BLOCK_RSV_CHUNK 4
1124 #define BTRFS_BLOCK_RSV_DELOPS 5
1125 #define BTRFS_BLOCK_RSV_EMPTY 6
1126 #define BTRFS_BLOCK_RSV_TEMP 7
1128 struct btrfs_block_rsv
{
1131 struct btrfs_space_info
*space_info
;
1133 unsigned short full
;
1134 unsigned short type
;
1135 unsigned short failfast
;
1139 * free clusters are used to claim free space in relatively large chunks,
1140 * allowing us to do less seeky writes. They are used for all metadata
1141 * allocations and data allocations in ssd mode.
1143 struct btrfs_free_cluster
{
1145 spinlock_t refill_lock
;
1146 struct rb_root root
;
1148 /* largest extent in this cluster */
1151 /* first extent starting offset */
1154 struct btrfs_block_group_cache
*block_group
;
1156 * when a cluster is allocated from a block group, we put the
1157 * cluster onto a list in the block group so that it can
1158 * be freed before the block group is freed.
1160 struct list_head block_group_list
;
1163 enum btrfs_caching_type
{
1165 BTRFS_CACHE_STARTED
= 1,
1166 BTRFS_CACHE_FAST
= 2,
1167 BTRFS_CACHE_FINISHED
= 3,
1170 enum btrfs_disk_cache_state
{
1171 BTRFS_DC_WRITTEN
= 0,
1175 BTRFS_DC_NEED_WRITE
= 4,
1178 struct btrfs_caching_control
{
1179 struct list_head list
;
1181 wait_queue_head_t wait
;
1182 struct btrfs_work work
;
1183 struct btrfs_block_group_cache
*block_group
;
1188 struct btrfs_block_group_cache
{
1189 struct btrfs_key key
;
1190 struct btrfs_block_group_item item
;
1191 struct btrfs_fs_info
*fs_info
;
1192 struct inode
*inode
;
1199 u64 cache_generation
;
1201 unsigned int dirty
:1;
1202 unsigned int iref
:1;
1204 int disk_cache_state
;
1206 /* cache tracking stuff */
1208 struct btrfs_caching_control
*caching_ctl
;
1209 u64 last_byte_to_unpin
;
1211 struct btrfs_space_info
*space_info
;
1213 /* free space cache stuff */
1214 struct btrfs_free_space_ctl
*free_space_ctl
;
1216 /* block group cache stuff */
1217 struct rb_node cache_node
;
1219 /* for block groups in the same raid type */
1220 struct list_head list
;
1225 /* List of struct btrfs_free_clusters for this block group.
1226 * Today it will only have one thing on it, but that may change
1228 struct list_head cluster_list
;
1230 /* For delayed block group creation */
1231 struct list_head new_bg_list
;
1234 /* delayed seq elem */
1236 struct list_head list
;
1241 struct reloc_control
;
1242 struct btrfs_device
;
1243 struct btrfs_fs_devices
;
1244 struct btrfs_balance_control
;
1245 struct btrfs_delayed_root
;
1246 struct btrfs_fs_info
{
1247 u8 fsid
[BTRFS_FSID_SIZE
];
1248 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1249 struct btrfs_root
*extent_root
;
1250 struct btrfs_root
*tree_root
;
1251 struct btrfs_root
*chunk_root
;
1252 struct btrfs_root
*dev_root
;
1253 struct btrfs_root
*fs_root
;
1254 struct btrfs_root
*csum_root
;
1255 struct btrfs_root
*quota_root
;
1257 /* the log root tree is a directory of all the other log roots */
1258 struct btrfs_root
*log_root_tree
;
1260 spinlock_t fs_roots_radix_lock
;
1261 struct radix_tree_root fs_roots_radix
;
1263 /* block group cache stuff */
1264 spinlock_t block_group_cache_lock
;
1265 u64 first_logical_byte
;
1266 struct rb_root block_group_cache_tree
;
1268 /* keep track of unallocated space */
1269 spinlock_t free_chunk_lock
;
1270 u64 free_chunk_space
;
1272 struct extent_io_tree freed_extents
[2];
1273 struct extent_io_tree
*pinned_extents
;
1275 /* logical->physical extent mapping */
1276 struct btrfs_mapping_tree mapping_tree
;
1279 * block reservation for extent, checksum, root tree and
1280 * delayed dir index item
1282 struct btrfs_block_rsv global_block_rsv
;
1283 /* block reservation for delay allocation */
1284 struct btrfs_block_rsv delalloc_block_rsv
;
1285 /* block reservation for metadata operations */
1286 struct btrfs_block_rsv trans_block_rsv
;
1287 /* block reservation for chunk tree */
1288 struct btrfs_block_rsv chunk_block_rsv
;
1289 /* block reservation for delayed operations */
1290 struct btrfs_block_rsv delayed_block_rsv
;
1292 struct btrfs_block_rsv empty_block_rsv
;
1295 u64 last_trans_committed
;
1298 * this is updated to the current trans every time a full commit
1299 * is required instead of the faster short fsync log commits
1301 u64 last_trans_log_full_commit
;
1302 unsigned long mount_opt
;
1303 unsigned long compress_type
:4;
1305 * It is a suggestive number, the read side is safe even it gets a
1306 * wrong number because we will write out the data into a regular
1307 * extent. The write side(mount/remount) is under ->s_umount lock,
1308 * so it is also safe.
1312 * Protected by ->chunk_mutex and sb->s_umount.
1314 * The reason that we use two lock to protect it is because only
1315 * remount and mount operations can change it and these two operations
1316 * are under sb->s_umount, but the read side (chunk allocation) can not
1317 * acquire sb->s_umount or the deadlock would happen. So we use two
1318 * locks to protect it. On the write side, we must acquire two locks,
1319 * and on the read side, we just need acquire one of them.
1322 struct btrfs_transaction
*running_transaction
;
1323 wait_queue_head_t transaction_throttle
;
1324 wait_queue_head_t transaction_wait
;
1325 wait_queue_head_t transaction_blocked_wait
;
1326 wait_queue_head_t async_submit_wait
;
1328 struct btrfs_super_block
*super_copy
;
1329 struct btrfs_super_block
*super_for_commit
;
1330 struct block_device
*__bdev
;
1331 struct super_block
*sb
;
1332 struct inode
*btree_inode
;
1333 struct backing_dev_info bdi
;
1334 struct mutex tree_log_mutex
;
1335 struct mutex transaction_kthread_mutex
;
1336 struct mutex cleaner_mutex
;
1337 struct mutex chunk_mutex
;
1338 struct mutex volume_mutex
;
1340 * this protects the ordered operations list only while we are
1341 * processing all of the entries on it. This way we make
1342 * sure the commit code doesn't find the list temporarily empty
1343 * because another function happens to be doing non-waiting preflush
1344 * before jumping into the main commit.
1346 struct mutex ordered_operations_mutex
;
1347 struct rw_semaphore extent_commit_sem
;
1349 struct rw_semaphore cleanup_work_sem
;
1351 struct rw_semaphore subvol_sem
;
1352 struct srcu_struct subvol_srcu
;
1354 spinlock_t trans_lock
;
1356 * the reloc mutex goes with the trans lock, it is taken
1357 * during commit to protect us from the relocation code
1359 struct mutex reloc_mutex
;
1361 struct list_head trans_list
;
1362 struct list_head dead_roots
;
1363 struct list_head caching_block_groups
;
1365 spinlock_t delayed_iput_lock
;
1366 struct list_head delayed_iputs
;
1368 /* this protects tree_mod_seq_list */
1369 spinlock_t tree_mod_seq_lock
;
1370 atomic_t tree_mod_seq
;
1371 struct list_head tree_mod_seq_list
;
1372 struct seq_list tree_mod_seq_elem
;
1374 /* this protects tree_mod_log */
1375 rwlock_t tree_mod_log_lock
;
1376 struct rb_root tree_mod_log
;
1378 atomic_t nr_async_submits
;
1379 atomic_t async_submit_draining
;
1380 atomic_t nr_async_bios
;
1381 atomic_t async_delalloc_pages
;
1382 atomic_t open_ioctl_trans
;
1385 * this is used by the balancing code to wait for all the pending
1388 spinlock_t ordered_extent_lock
;
1391 * all of the data=ordered extents pending writeback
1392 * these can span multiple transactions and basically include
1393 * every dirty data page that isn't from nodatacow
1395 struct list_head ordered_extents
;
1397 spinlock_t delalloc_lock
;
1399 * all of the inodes that have delalloc bytes. It is possible for
1400 * this list to be empty even when there is still dirty data=ordered
1401 * extents waiting to finish IO.
1403 struct list_head delalloc_inodes
;
1406 * special rename and truncate targets that must be on disk before
1407 * we're allowed to commit. This is basically the ext3 style
1408 * data=ordered list.
1410 struct list_head ordered_operations
;
1413 * there is a pool of worker threads for checksumming during writes
1414 * and a pool for checksumming after reads. This is because readers
1415 * can run with FS locks held, and the writers may be waiting for
1416 * those locks. We don't want ordering in the pending list to cause
1417 * deadlocks, and so the two are serviced separately.
1419 * A third pool does submit_bio to avoid deadlocking with the other
1422 struct btrfs_workers generic_worker
;
1423 struct btrfs_workers workers
;
1424 struct btrfs_workers delalloc_workers
;
1425 struct btrfs_workers flush_workers
;
1426 struct btrfs_workers endio_workers
;
1427 struct btrfs_workers endio_meta_workers
;
1428 struct btrfs_workers endio_meta_write_workers
;
1429 struct btrfs_workers endio_write_workers
;
1430 struct btrfs_workers endio_freespace_worker
;
1431 struct btrfs_workers submit_workers
;
1432 struct btrfs_workers caching_workers
;
1433 struct btrfs_workers readahead_workers
;
1436 * fixup workers take dirty pages that didn't properly go through
1437 * the cow mechanism and make them safe to write. It happens
1438 * for the sys_munmap function call path
1440 struct btrfs_workers fixup_workers
;
1441 struct btrfs_workers delayed_workers
;
1442 struct task_struct
*transaction_kthread
;
1443 struct task_struct
*cleaner_kthread
;
1444 int thread_pool_size
;
1446 struct kobject super_kobj
;
1447 struct completion kobj_unregister
;
1450 int log_root_recovering
;
1456 /* used to keep from writing metadata until there is a nice batch */
1457 struct percpu_counter dirty_metadata_bytes
;
1458 struct percpu_counter delalloc_bytes
;
1459 s32 dirty_metadata_batch
;
1462 struct list_head dirty_cowonly_roots
;
1464 struct btrfs_fs_devices
*fs_devices
;
1467 * the space_info list is almost entirely read only. It only changes
1468 * when we add a new raid type to the FS, and that happens
1469 * very rarely. RCU is used to protect it.
1471 struct list_head space_info
;
1473 struct btrfs_space_info
*data_sinfo
;
1475 struct reloc_control
*reloc_ctl
;
1477 /* data_alloc_cluster is only used in ssd mode */
1478 struct btrfs_free_cluster data_alloc_cluster
;
1480 /* all metadata allocations go through this cluster */
1481 struct btrfs_free_cluster meta_alloc_cluster
;
1483 /* auto defrag inodes go here */
1484 spinlock_t defrag_inodes_lock
;
1485 struct rb_root defrag_inodes
;
1486 atomic_t defrag_running
;
1488 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1489 seqlock_t profiles_lock
;
1491 * these three are in extended format (availability of single
1492 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1493 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1495 u64 avail_data_alloc_bits
;
1496 u64 avail_metadata_alloc_bits
;
1497 u64 avail_system_alloc_bits
;
1499 /* restriper state */
1500 spinlock_t balance_lock
;
1501 struct mutex balance_mutex
;
1502 atomic_t balance_running
;
1503 atomic_t balance_pause_req
;
1504 atomic_t balance_cancel_req
;
1505 struct btrfs_balance_control
*balance_ctl
;
1506 wait_queue_head_t balance_wait_q
;
1508 unsigned data_chunk_allocations
;
1509 unsigned metadata_ratio
;
1513 /* private scrub information */
1514 struct mutex scrub_lock
;
1515 atomic_t scrubs_running
;
1516 atomic_t scrub_pause_req
;
1517 atomic_t scrubs_paused
;
1518 atomic_t scrub_cancel_req
;
1519 wait_queue_head_t scrub_pause_wait
;
1520 struct rw_semaphore scrub_super_lock
;
1521 int scrub_workers_refcnt
;
1522 struct btrfs_workers scrub_workers
;
1523 struct btrfs_workers scrub_wr_completion_workers
;
1524 struct btrfs_workers scrub_nocow_workers
;
1526 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1527 u32 check_integrity_print_mask
;
1532 unsigned int quota_enabled
:1;
1535 * quota_enabled only changes state after a commit. This holds the
1538 unsigned int pending_quota_state
:1;
1540 /* is qgroup tracking in a consistent state? */
1543 /* holds configuration and tracking. Protected by qgroup_lock */
1544 struct rb_root qgroup_tree
;
1545 spinlock_t qgroup_lock
;
1547 /* list of dirty qgroups to be written at next commit */
1548 struct list_head dirty_qgroups
;
1550 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1553 /* filesystem state */
1554 unsigned long fs_state
;
1556 struct btrfs_delayed_root
*delayed_root
;
1558 /* readahead tree */
1559 spinlock_t reada_lock
;
1560 struct radix_tree_root reada_tree
;
1562 /* next backup root to be overwritten */
1563 int backup_root_index
;
1565 int num_tolerated_disk_barrier_failures
;
1567 /* device replace state */
1568 struct btrfs_dev_replace dev_replace
;
1570 atomic_t mutually_exclusive_operation_running
;
1574 * in ram representation of the tree. extent_root is used for all allocations
1575 * and for the extent tree extent_root root.
1578 struct extent_buffer
*node
;
1580 struct extent_buffer
*commit_root
;
1581 struct btrfs_root
*log_root
;
1582 struct btrfs_root
*reloc_root
;
1584 struct btrfs_root_item root_item
;
1585 struct btrfs_key root_key
;
1586 struct btrfs_fs_info
*fs_info
;
1587 struct extent_io_tree dirty_log_pages
;
1589 struct kobject root_kobj
;
1590 struct completion kobj_unregister
;
1591 struct mutex objectid_mutex
;
1593 spinlock_t accounting_lock
;
1594 struct btrfs_block_rsv
*block_rsv
;
1596 /* free ino cache stuff */
1597 struct mutex fs_commit_mutex
;
1598 struct btrfs_free_space_ctl
*free_ino_ctl
;
1599 enum btrfs_caching_type cached
;
1600 spinlock_t cache_lock
;
1601 wait_queue_head_t cache_wait
;
1602 struct btrfs_free_space_ctl
*free_ino_pinned
;
1604 struct inode
*cache_inode
;
1606 struct mutex log_mutex
;
1607 wait_queue_head_t log_writer_wait
;
1608 wait_queue_head_t log_commit_wait
[2];
1609 atomic_t log_writers
;
1610 atomic_t log_commit
[2];
1612 unsigned long log_transid
;
1613 unsigned long last_log_commit
;
1614 pid_t log_start_pid
;
1615 bool log_multiple_pids
;
1620 /* data allocations are done in sectorsize units */
1623 /* node allocations are done in nodesize units */
1626 /* leaf allocations are done in leafsize units */
1633 u64 highest_objectid
;
1635 /* btrfs_record_root_in_trans is a multi-step process,
1636 * and it can race with the balancing code. But the
1637 * race is very small, and only the first time the root
1638 * is added to each transaction. So in_trans_setup
1639 * is used to tell us when more checks are required
1641 unsigned long in_trans_setup
;
1646 u64 defrag_trans_start
;
1647 struct btrfs_key defrag_progress
;
1648 struct btrfs_key defrag_max
;
1652 /* the dirty list is only used by non-reference counted roots */
1653 struct list_head dirty_list
;
1655 struct list_head root_list
;
1657 spinlock_t log_extents_lock
[2];
1658 struct list_head logged_list
[2];
1660 spinlock_t orphan_lock
;
1661 atomic_t orphan_inodes
;
1662 struct btrfs_block_rsv
*orphan_block_rsv
;
1663 int orphan_item_inserted
;
1664 int orphan_cleanup_state
;
1666 spinlock_t inode_lock
;
1667 /* red-black tree that keeps track of in-memory inodes */
1668 struct rb_root inode_tree
;
1671 * radix tree that keeps track of delayed nodes of every inode,
1672 * protected by inode_lock
1674 struct radix_tree_root delayed_nodes_tree
;
1676 * right now this just gets used so that a root has its own devid
1677 * for stat. It may be used for more later
1683 spinlock_t root_item_lock
;
1686 struct btrfs_ioctl_defrag_range_args
{
1687 /* start of the defrag operation */
1690 /* number of bytes to defrag, use (u64)-1 to say all */
1694 * flags for the operation, which can include turning
1695 * on compression for this one defrag
1700 * any extent bigger than this will be considered
1701 * already defragged. Use 0 to take the kernel default
1702 * Use 1 to say every single extent must be rewritten
1704 __u32 extent_thresh
;
1707 * which compression method to use if turning on compression
1708 * for this defrag operation. If unspecified, zlib will
1711 __u32 compress_type
;
1713 /* spare for later */
1719 * inode items have the data typically returned from stat and store other
1720 * info about object characteristics. There is one for every file and dir in
1723 #define BTRFS_INODE_ITEM_KEY 1
1724 #define BTRFS_INODE_REF_KEY 12
1725 #define BTRFS_INODE_EXTREF_KEY 13
1726 #define BTRFS_XATTR_ITEM_KEY 24
1727 #define BTRFS_ORPHAN_ITEM_KEY 48
1728 /* reserve 2-15 close to the inode for later flexibility */
1731 * dir items are the name -> inode pointers in a directory. There is one
1732 * for every name in a directory.
1734 #define BTRFS_DIR_LOG_ITEM_KEY 60
1735 #define BTRFS_DIR_LOG_INDEX_KEY 72
1736 #define BTRFS_DIR_ITEM_KEY 84
1737 #define BTRFS_DIR_INDEX_KEY 96
1739 * extent data is for file data
1741 #define BTRFS_EXTENT_DATA_KEY 108
1744 * extent csums are stored in a separate tree and hold csums for
1745 * an entire extent on disk.
1747 #define BTRFS_EXTENT_CSUM_KEY 128
1750 * root items point to tree roots. They are typically in the root
1751 * tree used by the super block to find all the other trees
1753 #define BTRFS_ROOT_ITEM_KEY 132
1756 * root backrefs tie subvols and snapshots to the directory entries that
1759 #define BTRFS_ROOT_BACKREF_KEY 144
1762 * root refs make a fast index for listing all of the snapshots and
1763 * subvolumes referenced by a given root. They point directly to the
1764 * directory item in the root that references the subvol
1766 #define BTRFS_ROOT_REF_KEY 156
1769 * extent items are in the extent map tree. These record which blocks
1770 * are used, and how many references there are to each block
1772 #define BTRFS_EXTENT_ITEM_KEY 168
1774 #define BTRFS_TREE_BLOCK_REF_KEY 176
1776 #define BTRFS_EXTENT_DATA_REF_KEY 178
1778 #define BTRFS_EXTENT_REF_V0_KEY 180
1780 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1782 #define BTRFS_SHARED_DATA_REF_KEY 184
1785 * block groups give us hints into the extent allocation trees. Which
1786 * blocks are free etc etc
1788 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1790 #define BTRFS_DEV_EXTENT_KEY 204
1791 #define BTRFS_DEV_ITEM_KEY 216
1792 #define BTRFS_CHUNK_ITEM_KEY 228
1795 * Records the overall state of the qgroups.
1796 * There's only one instance of this key present,
1797 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1799 #define BTRFS_QGROUP_STATUS_KEY 240
1801 * Records the currently used space of the qgroup.
1802 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1804 #define BTRFS_QGROUP_INFO_KEY 242
1806 * Contains the user configured limits for the qgroup.
1807 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1809 #define BTRFS_QGROUP_LIMIT_KEY 244
1811 * Records the child-parent relationship of qgroups. For
1812 * each relation, 2 keys are present:
1813 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1814 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1816 #define BTRFS_QGROUP_RELATION_KEY 246
1818 #define BTRFS_BALANCE_ITEM_KEY 248
1821 * Persistantly stores the io stats in the device tree.
1822 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1824 #define BTRFS_DEV_STATS_KEY 249
1827 * Persistantly stores the device replace state in the device tree.
1828 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1830 #define BTRFS_DEV_REPLACE_KEY 250
1833 * string items are for debugging. They just store a short string of
1836 #define BTRFS_STRING_ITEM_KEY 253
1839 * Flags for mount options.
1841 * Note: don't forget to add new options to btrfs_show_options()
1843 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1844 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1845 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1846 #define BTRFS_MOUNT_SSD (1 << 3)
1847 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1848 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1849 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1850 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1851 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1852 #define BTRFS_MOUNT_NOSSD (1 << 9)
1853 #define BTRFS_MOUNT_DISCARD (1 << 10)
1854 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1855 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1856 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1857 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1858 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1859 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1860 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1861 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1862 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1863 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1864 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1865 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1867 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1868 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1869 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1874 #define BTRFS_INODE_NODATASUM (1 << 0)
1875 #define BTRFS_INODE_NODATACOW (1 << 1)
1876 #define BTRFS_INODE_READONLY (1 << 2)
1877 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1878 #define BTRFS_INODE_PREALLOC (1 << 4)
1879 #define BTRFS_INODE_SYNC (1 << 5)
1880 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1881 #define BTRFS_INODE_APPEND (1 << 7)
1882 #define BTRFS_INODE_NODUMP (1 << 8)
1883 #define BTRFS_INODE_NOATIME (1 << 9)
1884 #define BTRFS_INODE_DIRSYNC (1 << 10)
1885 #define BTRFS_INODE_COMPRESS (1 << 11)
1887 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1889 struct btrfs_map_token
{
1890 struct extent_buffer
*eb
;
1892 unsigned long offset
;
1895 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1897 token
->kaddr
= NULL
;
1900 /* some macros to generate set/get funcs for the struct fields. This
1901 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1904 #define le8_to_cpu(v) (v)
1905 #define cpu_to_le8(v) (v)
1908 #define read_eb_member(eb, ptr, type, member, result) ( \
1909 read_extent_buffer(eb, (char *)(result), \
1910 ((unsigned long)(ptr)) + \
1911 offsetof(type, member), \
1912 sizeof(((type *)0)->member)))
1914 #define write_eb_member(eb, ptr, type, member, result) ( \
1915 write_extent_buffer(eb, (char *)(result), \
1916 ((unsigned long)(ptr)) + \
1917 offsetof(type, member), \
1918 sizeof(((type *)0)->member)))
1920 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1921 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1922 unsigned long off, \
1923 struct btrfs_map_token *token); \
1924 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1925 unsigned long off, u##bits val, \
1926 struct btrfs_map_token *token); \
1927 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1928 unsigned long off) \
1930 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1932 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1933 unsigned long off, u##bits val) \
1935 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1938 DECLARE_BTRFS_SETGET_BITS(8)
1939 DECLARE_BTRFS_SETGET_BITS(16)
1940 DECLARE_BTRFS_SETGET_BITS(32)
1941 DECLARE_BTRFS_SETGET_BITS(64)
1943 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1944 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1946 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1947 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1949 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1952 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1953 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1955 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1956 struct btrfs_map_token *token) \
1958 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1959 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1961 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1962 type *s, u##bits val, \
1963 struct btrfs_map_token *token) \
1965 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1966 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1969 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1970 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1972 type *p = page_address(eb->pages[0]); \
1973 u##bits res = le##bits##_to_cpu(p->member); \
1976 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1979 type *p = page_address(eb->pages[0]); \
1980 p->member = cpu_to_le##bits(val); \
1983 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1984 static inline u##bits btrfs_##name(type *s) \
1986 return le##bits##_to_cpu(s->member); \
1988 static inline void btrfs_set_##name(type *s, u##bits val) \
1990 s->member = cpu_to_le##bits(val); \
1993 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1994 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1995 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1996 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1997 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1998 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2000 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2001 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2002 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2003 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2004 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2005 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2007 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2008 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2010 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2012 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2014 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2016 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2018 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2019 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2021 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2023 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2025 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2028 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
2030 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2033 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
2035 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2038 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2039 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2040 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2041 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2042 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2043 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2044 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2045 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2046 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2047 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2048 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2050 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2052 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2055 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2056 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2057 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2059 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2061 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2063 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2065 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2066 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2068 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2070 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2071 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2073 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2076 unsigned long offset
= (unsigned long)c
;
2077 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2078 offset
+= nr
* sizeof(struct btrfs_stripe
);
2079 return (struct btrfs_stripe
*)offset
;
2082 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2084 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2087 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2088 struct btrfs_chunk
*c
, int nr
)
2090 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2093 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2094 struct btrfs_chunk
*c
, int nr
)
2096 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2099 /* struct btrfs_block_group_item */
2100 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2102 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2104 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2105 struct btrfs_block_group_item
, chunk_objectid
, 64);
2107 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2108 struct btrfs_block_group_item
, chunk_objectid
, 64);
2109 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2110 struct btrfs_block_group_item
, flags
, 64);
2111 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2112 struct btrfs_block_group_item
, flags
, 64);
2114 /* struct btrfs_inode_ref */
2115 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2116 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2118 /* struct btrfs_inode_extref */
2119 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2120 parent_objectid
, 64);
2121 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2123 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2125 /* struct btrfs_inode_item */
2126 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2127 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2128 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2129 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2130 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2131 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2132 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2133 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2134 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2135 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2136 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2137 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2139 static inline struct btrfs_timespec
*
2140 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2142 unsigned long ptr
= (unsigned long)inode_item
;
2143 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2144 return (struct btrfs_timespec
*)ptr
;
2147 static inline struct btrfs_timespec
*
2148 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2150 unsigned long ptr
= (unsigned long)inode_item
;
2151 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2152 return (struct btrfs_timespec
*)ptr
;
2155 static inline struct btrfs_timespec
*
2156 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2158 unsigned long ptr
= (unsigned long)inode_item
;
2159 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2160 return (struct btrfs_timespec
*)ptr
;
2163 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2164 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2166 /* struct btrfs_dev_extent */
2167 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2169 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2170 chunk_objectid
, 64);
2171 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2173 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2175 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2177 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2178 return (u8
*)((unsigned long)dev
+ ptr
);
2181 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2182 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2184 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2186 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2189 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2191 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2192 struct btrfs_tree_block_info
*item
,
2193 struct btrfs_disk_key
*key
)
2195 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2198 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2199 struct btrfs_tree_block_info
*item
,
2200 struct btrfs_disk_key
*key
)
2202 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2205 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2207 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2209 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2211 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2214 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2217 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2219 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2222 static inline u32
btrfs_extent_inline_ref_size(int type
)
2224 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2225 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2226 return sizeof(struct btrfs_extent_inline_ref
);
2227 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2228 return sizeof(struct btrfs_shared_data_ref
) +
2229 sizeof(struct btrfs_extent_inline_ref
);
2230 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2231 return sizeof(struct btrfs_extent_data_ref
) +
2232 offsetof(struct btrfs_extent_inline_ref
, offset
);
2237 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2238 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2240 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2241 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2243 /* struct btrfs_node */
2244 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2245 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2247 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2250 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2251 sizeof(struct btrfs_key_ptr
) * nr
;
2252 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2255 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2259 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2260 sizeof(struct btrfs_key_ptr
) * nr
;
2261 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2264 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2267 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2268 sizeof(struct btrfs_key_ptr
) * nr
;
2269 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2272 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2276 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2277 sizeof(struct btrfs_key_ptr
) * nr
;
2278 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2281 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2283 return offsetof(struct btrfs_node
, ptrs
) +
2284 sizeof(struct btrfs_key_ptr
) * nr
;
2287 void btrfs_node_key(struct extent_buffer
*eb
,
2288 struct btrfs_disk_key
*disk_key
, int nr
);
2290 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2291 struct btrfs_disk_key
*disk_key
, int nr
)
2294 ptr
= btrfs_node_key_ptr_offset(nr
);
2295 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2296 struct btrfs_key_ptr
, key
, disk_key
);
2299 /* struct btrfs_item */
2300 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2301 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2303 static inline unsigned long btrfs_item_nr_offset(int nr
)
2305 return offsetof(struct btrfs_leaf
, items
) +
2306 sizeof(struct btrfs_item
) * nr
;
2309 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
2312 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2315 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2316 struct btrfs_item
*item
)
2318 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2321 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2323 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
2326 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2328 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
2331 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2333 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
2336 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2337 struct btrfs_disk_key
*disk_key
, int nr
)
2339 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2340 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2343 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2344 struct btrfs_disk_key
*disk_key
, int nr
)
2346 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2347 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2350 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2353 * struct btrfs_root_ref
2355 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2356 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2357 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2359 /* struct btrfs_dir_item */
2360 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2361 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2362 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2363 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2365 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2366 struct btrfs_dir_item
*item
,
2367 struct btrfs_disk_key
*key
)
2369 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2372 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2373 struct btrfs_dir_item
*item
,
2374 struct btrfs_disk_key
*key
)
2376 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2379 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2381 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2383 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2386 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2387 struct btrfs_free_space_header
*h
,
2388 struct btrfs_disk_key
*key
)
2390 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2393 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2394 struct btrfs_free_space_header
*h
,
2395 struct btrfs_disk_key
*key
)
2397 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2400 /* struct btrfs_disk_key */
2401 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2403 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2404 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2406 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2407 struct btrfs_disk_key
*disk
)
2409 cpu
->offset
= le64_to_cpu(disk
->offset
);
2410 cpu
->type
= disk
->type
;
2411 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2414 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2415 struct btrfs_key
*cpu
)
2417 disk
->offset
= cpu_to_le64(cpu
->offset
);
2418 disk
->type
= cpu
->type
;
2419 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2422 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2423 struct btrfs_key
*key
, int nr
)
2425 struct btrfs_disk_key disk_key
;
2426 btrfs_node_key(eb
, &disk_key
, nr
);
2427 btrfs_disk_key_to_cpu(key
, &disk_key
);
2430 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2431 struct btrfs_key
*key
, int nr
)
2433 struct btrfs_disk_key disk_key
;
2434 btrfs_item_key(eb
, &disk_key
, nr
);
2435 btrfs_disk_key_to_cpu(key
, &disk_key
);
2438 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2439 struct btrfs_dir_item
*item
,
2440 struct btrfs_key
*key
)
2442 struct btrfs_disk_key disk_key
;
2443 btrfs_dir_item_key(eb
, item
, &disk_key
);
2444 btrfs_disk_key_to_cpu(key
, &disk_key
);
2448 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2453 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2458 /* struct btrfs_header */
2459 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2460 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2462 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2463 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2464 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2465 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2467 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2469 return (btrfs_header_flags(eb
) & flag
) == flag
;
2472 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2474 u64 flags
= btrfs_header_flags(eb
);
2475 btrfs_set_header_flags(eb
, flags
| flag
);
2476 return (flags
& flag
) == flag
;
2479 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2481 u64 flags
= btrfs_header_flags(eb
);
2482 btrfs_set_header_flags(eb
, flags
& ~flag
);
2483 return (flags
& flag
) == flag
;
2486 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2488 u64 flags
= btrfs_header_flags(eb
);
2489 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2492 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2495 u64 flags
= btrfs_header_flags(eb
);
2496 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2497 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2498 btrfs_set_header_flags(eb
, flags
);
2501 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2503 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2507 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2509 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2513 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2515 return btrfs_header_level(eb
) == 0;
2518 /* struct btrfs_root_item */
2519 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2521 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2522 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2523 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2525 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2527 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2528 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2529 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2530 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2531 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2532 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2533 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2534 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2536 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2538 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2540 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2542 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2544 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2547 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2549 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2552 /* struct btrfs_root_backup */
2553 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2555 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2557 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2558 tree_root_level
, 8);
2560 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2562 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2563 chunk_root_gen
, 64);
2564 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2565 chunk_root_level
, 8);
2567 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2569 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2570 extent_root_gen
, 64);
2571 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2572 extent_root_level
, 8);
2574 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2576 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2578 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2581 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2583 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2585 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2588 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2590 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2592 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2593 csum_root_level
, 8);
2594 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2596 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2598 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2601 /* struct btrfs_balance_item */
2602 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2604 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2605 struct btrfs_balance_item
*bi
,
2606 struct btrfs_disk_balance_args
*ba
)
2608 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2611 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2612 struct btrfs_balance_item
*bi
,
2613 struct btrfs_disk_balance_args
*ba
)
2615 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2618 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2619 struct btrfs_balance_item
*bi
,
2620 struct btrfs_disk_balance_args
*ba
)
2622 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2625 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2626 struct btrfs_balance_item
*bi
,
2627 struct btrfs_disk_balance_args
*ba
)
2629 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2632 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2633 struct btrfs_balance_item
*bi
,
2634 struct btrfs_disk_balance_args
*ba
)
2636 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2639 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2640 struct btrfs_balance_item
*bi
,
2641 struct btrfs_disk_balance_args
*ba
)
2643 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2647 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2648 struct btrfs_disk_balance_args
*disk
)
2650 memset(cpu
, 0, sizeof(*cpu
));
2652 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2653 cpu
->usage
= le64_to_cpu(disk
->usage
);
2654 cpu
->devid
= le64_to_cpu(disk
->devid
);
2655 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2656 cpu
->pend
= le64_to_cpu(disk
->pend
);
2657 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2658 cpu
->vend
= le64_to_cpu(disk
->vend
);
2659 cpu
->target
= le64_to_cpu(disk
->target
);
2660 cpu
->flags
= le64_to_cpu(disk
->flags
);
2664 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2665 struct btrfs_balance_args
*cpu
)
2667 memset(disk
, 0, sizeof(*disk
));
2669 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2670 disk
->usage
= cpu_to_le64(cpu
->usage
);
2671 disk
->devid
= cpu_to_le64(cpu
->devid
);
2672 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2673 disk
->pend
= cpu_to_le64(cpu
->pend
);
2674 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2675 disk
->vend
= cpu_to_le64(cpu
->vend
);
2676 disk
->target
= cpu_to_le64(cpu
->target
);
2677 disk
->flags
= cpu_to_le64(cpu
->flags
);
2680 /* struct btrfs_super_block */
2681 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2682 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2683 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2685 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2686 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2687 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2688 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2689 struct btrfs_super_block
, chunk_root_generation
, 64);
2690 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2692 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2694 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2695 chunk_root_level
, 8);
2696 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2698 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2699 log_root_transid
, 64);
2700 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2702 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2704 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2706 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2708 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2710 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2712 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2714 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2715 root_dir_objectid
, 64);
2716 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2718 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2720 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2721 compat_ro_flags
, 64);
2722 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2723 incompat_flags
, 64);
2724 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2726 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2727 cache_generation
, 64);
2729 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2731 int t
= btrfs_super_csum_type(s
);
2732 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2733 return btrfs_csum_sizes
[t
];
2736 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2738 return offsetof(struct btrfs_leaf
, items
);
2741 /* struct btrfs_file_extent_item */
2742 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2744 static inline unsigned long
2745 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2747 unsigned long offset
= (unsigned long)e
;
2748 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2752 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2754 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2757 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2759 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2761 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2762 disk_num_bytes
, 64);
2763 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2765 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2767 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2769 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2771 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2773 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2774 other_encoding
, 16);
2776 /* this returns the number of file bytes represented by the inline item.
2777 * If an item is compressed, this is the uncompressed size
2779 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2780 struct btrfs_file_extent_item
*e
)
2782 return btrfs_file_extent_ram_bytes(eb
, e
);
2786 * this returns the number of bytes used by the item on disk, minus the
2787 * size of any extent headers. If a file is compressed on disk, this is
2788 * the compressed size
2790 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2791 struct btrfs_item
*e
)
2793 unsigned long offset
;
2794 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2795 return btrfs_item_size(eb
, e
) - offset
;
2798 /* btrfs_dev_stats_item */
2799 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2800 struct btrfs_dev_stats_item
*ptr
,
2805 read_extent_buffer(eb
, &val
,
2806 offsetof(struct btrfs_dev_stats_item
, values
) +
2807 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2812 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2813 struct btrfs_dev_stats_item
*ptr
,
2816 write_extent_buffer(eb
, &val
,
2817 offsetof(struct btrfs_dev_stats_item
, values
) +
2818 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2822 /* btrfs_qgroup_status_item */
2823 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2825 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2827 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2829 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2832 /* btrfs_qgroup_info_item */
2833 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2835 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2836 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2838 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2839 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2842 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2843 struct btrfs_qgroup_info_item
, generation
, 64);
2844 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2846 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2847 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2848 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2850 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2851 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2853 /* btrfs_qgroup_limit_item */
2854 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2856 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2858 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2860 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2862 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2865 /* btrfs_dev_replace_item */
2866 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2867 struct btrfs_dev_replace_item
, src_devid
, 64);
2868 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2869 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2871 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2873 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2875 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2877 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2878 num_write_errors
, 64);
2879 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2880 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2882 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2884 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2887 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2888 struct btrfs_dev_replace_item
, src_devid
, 64);
2889 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2890 struct btrfs_dev_replace_item
,
2891 cont_reading_from_srcdev_mode
, 64);
2892 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2893 struct btrfs_dev_replace_item
, replace_state
, 64);
2894 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2895 struct btrfs_dev_replace_item
, time_started
, 64);
2896 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2897 struct btrfs_dev_replace_item
, time_stopped
, 64);
2898 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2899 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2900 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2901 struct btrfs_dev_replace_item
,
2902 num_uncorrectable_read_errors
, 64);
2903 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2904 struct btrfs_dev_replace_item
, cursor_left
, 64);
2905 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2906 struct btrfs_dev_replace_item
, cursor_right
, 64);
2908 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2910 return sb
->s_fs_info
;
2913 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2916 return root
->leafsize
;
2917 return root
->nodesize
;
2920 /* helper function to cast into the data area of the leaf. */
2921 #define btrfs_item_ptr(leaf, slot, type) \
2922 ((type *)(btrfs_leaf_data(leaf) + \
2923 btrfs_item_offset_nr(leaf, slot)))
2925 #define btrfs_item_ptr_offset(leaf, slot) \
2926 ((unsigned long)(btrfs_leaf_data(leaf) + \
2927 btrfs_item_offset_nr(leaf, slot)))
2929 static inline struct dentry
*fdentry(struct file
*file
)
2931 return file
->f_path
.dentry
;
2934 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2936 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2937 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2940 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2942 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2946 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2949 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2954 * Doing a truncate won't result in new nodes or leaves, just what we need for
2957 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2960 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2964 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2965 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2966 struct btrfs_root
*root
, unsigned long count
);
2967 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2968 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2969 struct btrfs_root
*root
, u64 bytenr
,
2970 u64 num_bytes
, u64
*refs
, u64
*flags
);
2971 int btrfs_pin_extent(struct btrfs_root
*root
,
2972 u64 bytenr
, u64 num
, int reserved
);
2973 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
2974 u64 bytenr
, u64 num_bytes
);
2975 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2976 struct btrfs_root
*root
,
2977 u64 objectid
, u64 offset
, u64 bytenr
);
2978 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2979 struct btrfs_fs_info
*info
,
2981 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2982 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2983 u64 search_start
, u64 search_hint
, int owner
);
2984 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2985 struct btrfs_root
*root
, u32 blocksize
,
2986 u64 parent
, u64 root_objectid
,
2987 struct btrfs_disk_key
*key
, int level
,
2988 u64 hint
, u64 empty_size
);
2989 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2990 struct btrfs_root
*root
,
2991 struct extent_buffer
*buf
,
2992 u64 parent
, int last_ref
);
2993 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2994 struct btrfs_root
*root
,
2995 u64 bytenr
, u32 blocksize
,
2997 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2998 struct btrfs_root
*root
,
2999 u64 root_objectid
, u64 owner
,
3000 u64 offset
, struct btrfs_key
*ins
);
3001 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3002 struct btrfs_root
*root
,
3003 u64 root_objectid
, u64 owner
, u64 offset
,
3004 struct btrfs_key
*ins
);
3005 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
3006 struct btrfs_root
*root
,
3007 u64 num_bytes
, u64 min_alloc_size
,
3008 u64 empty_size
, u64 hint_byte
,
3009 struct btrfs_key
*ins
, u64 data
);
3010 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3011 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3012 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3013 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3014 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3015 struct btrfs_root
*root
,
3016 u64 bytenr
, u64 num_bytes
, u64 flags
,
3018 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3019 struct btrfs_root
*root
,
3020 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3021 u64 owner
, u64 offset
, int for_cow
);
3023 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3024 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3025 u64 start
, u64 len
);
3026 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3027 struct btrfs_root
*root
);
3028 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3029 struct btrfs_root
*root
);
3030 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3031 struct btrfs_root
*root
,
3032 u64 bytenr
, u64 num_bytes
, u64 parent
,
3033 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3035 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3036 struct btrfs_root
*root
);
3037 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3038 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3039 int btrfs_read_block_groups(struct btrfs_root
*root
);
3040 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3041 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3042 struct btrfs_root
*root
, u64 bytes_used
,
3043 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3045 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3046 struct btrfs_root
*root
, u64 group_start
);
3047 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3048 struct btrfs_root
*root
);
3049 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
3050 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3051 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3053 enum btrfs_reserve_flush_enum
{
3054 /* If we are in the transaction, we can't flush anything.*/
3055 BTRFS_RESERVE_NO_FLUSH
,
3057 * Flushing delalloc may cause deadlock somewhere, in this
3058 * case, use FLUSH LIMIT
3060 BTRFS_RESERVE_FLUSH_LIMIT
,
3061 BTRFS_RESERVE_FLUSH_ALL
,
3064 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3065 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3066 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3067 struct btrfs_root
*root
);
3068 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3069 struct inode
*inode
);
3070 void btrfs_orphan_release_metadata(struct inode
*inode
);
3071 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
3072 struct btrfs_pending_snapshot
*pending
);
3073 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3074 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3075 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3076 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3077 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3078 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3079 unsigned short type
);
3080 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3081 struct btrfs_block_rsv
*rsv
);
3082 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3083 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3084 enum btrfs_reserve_flush_enum flush
);
3085 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3086 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3087 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3088 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3089 enum btrfs_reserve_flush_enum flush
);
3090 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3091 struct btrfs_block_rsv
*dst_rsv
,
3093 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3094 struct btrfs_block_rsv
*block_rsv
,
3096 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3097 struct btrfs_block_group_cache
*cache
);
3098 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3099 struct btrfs_block_group_cache
*cache
);
3100 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3101 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3102 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3103 u64 start
, u64 end
);
3104 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3105 u64 num_bytes
, u64
*actual_bytes
);
3106 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3107 struct btrfs_root
*root
, u64 type
);
3108 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3110 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3111 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3112 struct btrfs_fs_info
*fs_info
);
3113 int __get_raid_index(u64 flags
);
3115 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3116 int level
, int *slot
);
3117 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3118 int btrfs_previous_item(struct btrfs_root
*root
,
3119 struct btrfs_path
*path
, u64 min_objectid
,
3121 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
3122 struct btrfs_root
*root
, struct btrfs_path
*path
,
3123 struct btrfs_key
*new_key
);
3124 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3125 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3126 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3127 struct btrfs_key
*key
, int lowest_level
,
3129 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3130 struct btrfs_key
*max_key
,
3131 struct btrfs_path
*path
,
3133 enum btrfs_compare_tree_result
{
3134 BTRFS_COMPARE_TREE_NEW
,
3135 BTRFS_COMPARE_TREE_DELETED
,
3136 BTRFS_COMPARE_TREE_CHANGED
,
3138 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3139 struct btrfs_root
*right_root
,
3140 struct btrfs_path
*left_path
,
3141 struct btrfs_path
*right_path
,
3142 struct btrfs_key
*key
,
3143 enum btrfs_compare_tree_result result
,
3145 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3146 struct btrfs_root
*right_root
,
3147 btrfs_changed_cb_t cb
, void *ctx
);
3148 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3149 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3150 struct extent_buffer
*parent
, int parent_slot
,
3151 struct extent_buffer
**cow_ret
);
3152 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3153 struct btrfs_root
*root
,
3154 struct extent_buffer
*buf
,
3155 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3156 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3157 struct extent_buffer
*buf
);
3158 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
3159 struct btrfs_root
*root
, struct btrfs_path
*path
,
3161 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
3162 struct btrfs_root
*root
,
3163 struct btrfs_path
*path
,
3164 u32 new_size
, int from_end
);
3165 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3166 struct btrfs_root
*root
,
3167 struct btrfs_path
*path
,
3168 struct btrfs_key
*new_key
,
3169 unsigned long split_offset
);
3170 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3171 struct btrfs_root
*root
,
3172 struct btrfs_path
*path
,
3173 struct btrfs_key
*new_key
);
3174 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3175 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3177 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3178 struct btrfs_path
*p
, u64 time_seq
);
3179 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3180 struct btrfs_key
*key
, struct btrfs_path
*p
,
3181 int find_higher
, int return_any
);
3182 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3183 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3184 int start_slot
, u64
*last_ret
,
3185 struct btrfs_key
*progress
);
3186 void btrfs_release_path(struct btrfs_path
*p
);
3187 struct btrfs_path
*btrfs_alloc_path(void);
3188 void btrfs_free_path(struct btrfs_path
*p
);
3189 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3190 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3191 struct extent_buffer
*held
, int held_rw
);
3192 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3194 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3195 struct btrfs_path
*path
, int slot
, int nr
);
3196 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3197 struct btrfs_root
*root
,
3198 struct btrfs_path
*path
)
3200 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3203 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
3204 struct btrfs_root
*root
, struct btrfs_path
*path
,
3205 struct btrfs_key
*cpu_key
, u32
*data_size
,
3206 u32 total_data
, u32 total_size
, int nr
);
3207 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3208 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3209 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3210 struct btrfs_root
*root
,
3211 struct btrfs_path
*path
,
3212 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3214 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3215 struct btrfs_root
*root
,
3216 struct btrfs_path
*path
,
3217 struct btrfs_key
*key
,
3220 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3223 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3224 int btrfs_next_leaf_write(struct btrfs_trans_handle
*trans
,
3225 struct btrfs_root
*root
, struct btrfs_path
*path
,
3227 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3229 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3230 struct btrfs_path
*p
, u64 time_seq
)
3233 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3234 return btrfs_next_old_leaf(root
, p
, time_seq
);
3237 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3239 return btrfs_next_old_item(root
, p
, 0);
3241 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3242 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3243 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3244 struct btrfs_block_rsv
*block_rsv
,
3245 int update_ref
, int for_reloc
);
3246 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3247 struct btrfs_root
*root
,
3248 struct extent_buffer
*node
,
3249 struct extent_buffer
*parent
);
3250 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3253 * Get synced with close_ctree()
3256 return fs_info
->closing
;
3258 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3260 kfree(fs_info
->balance_ctl
);
3261 kfree(fs_info
->delayed_root
);
3262 kfree(fs_info
->extent_root
);
3263 kfree(fs_info
->tree_root
);
3264 kfree(fs_info
->chunk_root
);
3265 kfree(fs_info
->dev_root
);
3266 kfree(fs_info
->csum_root
);
3267 kfree(fs_info
->quota_root
);
3268 kfree(fs_info
->super_copy
);
3269 kfree(fs_info
->super_for_commit
);
3273 /* tree mod log functions from ctree.c */
3274 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3275 struct seq_list
*elem
);
3276 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3277 struct seq_list
*elem
);
3278 static inline u64
btrfs_inc_tree_mod_seq(struct btrfs_fs_info
*fs_info
)
3280 return atomic_inc_return(&fs_info
->tree_mod_seq
);
3282 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3285 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3286 struct btrfs_path
*path
,
3287 u64 root_id
, u64 ref_id
);
3288 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3289 struct btrfs_root
*tree_root
,
3290 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3291 const char *name
, int name_len
);
3292 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3293 struct btrfs_root
*tree_root
,
3294 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3295 const char *name
, int name_len
);
3296 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3297 struct btrfs_key
*key
);
3298 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3299 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3301 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3302 struct btrfs_root
*root
,
3303 struct btrfs_key
*key
,
3304 struct btrfs_root_item
*item
);
3305 void btrfs_read_root_item(struct btrfs_root
*root
,
3306 struct extent_buffer
*eb
, int slot
,
3307 struct btrfs_root_item
*item
);
3308 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
3309 btrfs_root_item
*item
, struct btrfs_key
*key
);
3310 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
3311 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3312 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3313 struct extent_buffer
*node
);
3314 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3315 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3316 struct btrfs_root
*root
);
3319 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3320 const char *name
, int name_len
);
3321 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3322 struct btrfs_root
*root
, const char *name
,
3323 int name_len
, struct inode
*dir
,
3324 struct btrfs_key
*location
, u8 type
, u64 index
);
3325 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3326 struct btrfs_root
*root
,
3327 struct btrfs_path
*path
, u64 dir
,
3328 const char *name
, int name_len
,
3330 struct btrfs_dir_item
*
3331 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3332 struct btrfs_root
*root
,
3333 struct btrfs_path
*path
, u64 dir
,
3334 u64 objectid
, const char *name
, int name_len
,
3336 struct btrfs_dir_item
*
3337 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3338 struct btrfs_path
*path
, u64 dirid
,
3339 const char *name
, int name_len
);
3340 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3341 struct btrfs_path
*path
,
3342 const char *name
, int name_len
);
3343 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3344 struct btrfs_root
*root
,
3345 struct btrfs_path
*path
,
3346 struct btrfs_dir_item
*di
);
3347 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3348 struct btrfs_root
*root
,
3349 struct btrfs_path
*path
, u64 objectid
,
3350 const char *name
, u16 name_len
,
3351 const void *data
, u16 data_len
);
3352 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3353 struct btrfs_root
*root
,
3354 struct btrfs_path
*path
, u64 dir
,
3355 const char *name
, u16 name_len
,
3357 int verify_dir_item(struct btrfs_root
*root
,
3358 struct extent_buffer
*leaf
,
3359 struct btrfs_dir_item
*dir_item
);
3362 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3363 struct btrfs_root
*root
, u64 offset
);
3364 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3365 struct btrfs_root
*root
, u64 offset
);
3366 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3369 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3370 struct btrfs_root
*root
,
3371 const char *name
, int name_len
,
3372 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3373 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3374 struct btrfs_root
*root
,
3375 const char *name
, int name_len
,
3376 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3377 int btrfs_get_inode_ref_index(struct btrfs_trans_handle
*trans
,
3378 struct btrfs_root
*root
,
3379 struct btrfs_path
*path
,
3380 const char *name
, int name_len
,
3381 u64 inode_objectid
, u64 ref_objectid
, int mod
,
3383 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3384 struct btrfs_root
*root
,
3385 struct btrfs_path
*path
, u64 objectid
);
3386 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3387 *root
, struct btrfs_path
*path
,
3388 struct btrfs_key
*location
, int mod
);
3390 struct btrfs_inode_extref
*
3391 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3392 struct btrfs_root
*root
,
3393 struct btrfs_path
*path
,
3394 const char *name
, int name_len
,
3395 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3398 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3399 u64 ref_objectid
, const char *name
,
3401 struct btrfs_inode_extref
**extref_ret
);
3404 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3405 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3406 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3407 struct bio
*bio
, u32
*dst
);
3408 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3409 struct bio
*bio
, u64 logical_offset
);
3410 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3411 struct btrfs_root
*root
,
3412 u64 objectid
, u64 pos
,
3413 u64 disk_offset
, u64 disk_num_bytes
,
3414 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3415 u8 compression
, u8 encryption
, u16 other_encoding
);
3416 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3417 struct btrfs_root
*root
,
3418 struct btrfs_path
*path
, u64 objectid
,
3419 u64 bytenr
, int mod
);
3420 u64
btrfs_file_extent_length(struct btrfs_path
*path
);
3421 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3422 struct btrfs_root
*root
,
3423 struct btrfs_ordered_sum
*sums
);
3424 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3425 struct bio
*bio
, u64 file_start
, int contig
);
3426 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
3427 struct btrfs_root
*root
,
3428 struct btrfs_path
*path
,
3429 u64 bytenr
, int cow
);
3430 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
3431 struct btrfs_root
*root
, struct btrfs_path
*path
,
3433 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3434 struct list_head
*list
, int search_commit
);
3436 struct btrfs_delalloc_work
{
3437 struct inode
*inode
;
3440 struct completion completion
;
3441 struct list_head list
;
3442 struct btrfs_work work
;
3445 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3446 int wait
, int delay_iput
);
3447 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3449 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3450 size_t pg_offset
, u64 start
, u64 len
,
3453 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3454 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3455 #define ClearPageChecked ClearPageFsMisc
3456 #define SetPageChecked SetPageFsMisc
3457 #define PageChecked PageFsMisc
3460 /* This forces readahead on a given range of bytes in an inode */
3461 static inline void btrfs_force_ra(struct address_space
*mapping
,
3462 struct file_ra_state
*ra
, struct file
*file
,
3463 pgoff_t offset
, unsigned long req_size
)
3465 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3468 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3469 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3470 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3471 struct btrfs_root
*root
,
3472 struct inode
*dir
, struct inode
*inode
,
3473 const char *name
, int name_len
);
3474 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3475 struct inode
*parent_inode
, struct inode
*inode
,
3476 const char *name
, int name_len
, int add_backref
, u64 index
);
3477 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3478 struct btrfs_root
*root
,
3479 struct inode
*dir
, u64 objectid
,
3480 const char *name
, int name_len
);
3481 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3483 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3484 struct btrfs_root
*root
,
3485 struct inode
*inode
, u64 new_size
,
3488 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3489 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3490 struct extent_state
**cached_state
);
3491 int btrfs_writepages(struct address_space
*mapping
,
3492 struct writeback_control
*wbc
);
3493 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3494 struct btrfs_root
*new_root
, u64 new_dirid
);
3495 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3496 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
3498 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3499 int btrfs_readpage(struct file
*file
, struct page
*page
);
3500 void btrfs_evict_inode(struct inode
*inode
);
3501 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3502 int btrfs_dirty_inode(struct inode
*inode
);
3503 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3504 void btrfs_destroy_inode(struct inode
*inode
);
3505 int btrfs_drop_inode(struct inode
*inode
);
3506 int btrfs_init_cachep(void);
3507 void btrfs_destroy_cachep(void);
3508 long btrfs_ioctl_trans_end(struct file
*file
);
3509 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3510 struct btrfs_root
*root
, int *was_new
);
3511 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3512 size_t pg_offset
, u64 start
, u64 end
,
3514 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3515 struct btrfs_root
*root
,
3516 struct inode
*inode
);
3517 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3518 struct btrfs_root
*root
, struct inode
*inode
);
3519 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3520 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3521 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3522 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3523 struct btrfs_root
*root
);
3524 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3525 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3526 void btrfs_add_delayed_iput(struct inode
*inode
);
3527 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3528 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3529 u64 start
, u64 num_bytes
, u64 min_size
,
3530 loff_t actual_len
, u64
*alloc_hint
);
3531 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3532 struct btrfs_trans_handle
*trans
, int mode
,
3533 u64 start
, u64 num_bytes
, u64 min_size
,
3534 loff_t actual_len
, u64
*alloc_hint
);
3535 extern const struct dentry_operations btrfs_dentry_operations
;
3538 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3539 void btrfs_update_iflags(struct inode
*inode
);
3540 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3541 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3542 struct btrfs_ioctl_defrag_range_args
*range
,
3543 u64 newer_than
, unsigned long max_pages
);
3544 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3545 struct btrfs_ioctl_space_info
*space
);
3548 int btrfs_auto_defrag_init(void);
3549 void btrfs_auto_defrag_exit(void);
3550 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3551 struct inode
*inode
);
3552 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3553 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3554 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3555 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3557 int btrfs_replace_extent_cache(struct inode
*inode
, struct extent_map
*replace
,
3558 u64 start
, u64 end
, int skip_pinned
,
3560 extern const struct file_operations btrfs_file_operations
;
3561 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3562 struct btrfs_root
*root
, struct inode
*inode
,
3563 struct btrfs_path
*path
, u64 start
, u64 end
,
3564 u64
*drop_end
, int drop_cache
);
3565 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3566 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3567 u64 end
, int drop_cache
);
3568 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3569 struct inode
*inode
, u64 start
, u64 end
);
3570 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3571 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
3572 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3573 struct page
**pages
, size_t num_pages
,
3574 loff_t pos
, size_t write_bytes
,
3575 struct extent_state
**cached
);
3578 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3579 struct btrfs_root
*root
);
3582 int btrfs_init_sysfs(void);
3583 void btrfs_exit_sysfs(void);
3586 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3589 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3590 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3592 #ifdef CONFIG_PRINTK
3594 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3596 static inline __printf(2, 3)
3597 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3603 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3604 unsigned int line
, int errno
, const char *fmt
, ...);
3607 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3608 struct btrfs_root
*root
, const char *function
,
3609 unsigned int line
, int errno
);
3611 #define btrfs_set_fs_incompat(__fs_info, opt) \
3612 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3614 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3617 struct btrfs_super_block
*disk_super
;
3620 disk_super
= fs_info
->super_copy
;
3621 features
= btrfs_super_incompat_flags(disk_super
);
3622 if (!(features
& flag
)) {
3624 btrfs_set_super_incompat_flags(disk_super
, features
);
3629 * Call btrfs_abort_transaction as early as possible when an error condition is
3630 * detected, that way the exact line number is reported.
3633 #define btrfs_abort_transaction(trans, root, errno) \
3635 __btrfs_abort_transaction(trans, root, __func__, \
3639 #define btrfs_std_error(fs_info, errno) \
3642 __btrfs_std_error((fs_info), __func__, \
3643 __LINE__, (errno), NULL); \
3646 #define btrfs_error(fs_info, errno, fmt, args...) \
3648 __btrfs_std_error((fs_info), __func__, __LINE__, \
3649 (errno), fmt, ##args); \
3653 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3654 unsigned int line
, int errno
, const char *fmt
, ...);
3657 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3658 * will panic(). Otherwise we BUG() here.
3660 #define btrfs_panic(fs_info, errno, fmt, args...) \
3662 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3667 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3668 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3669 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3670 struct inode
*inode
, struct inode
*dir
);
3671 int btrfs_acl_chmod(struct inode
*inode
);
3673 #define btrfs_get_acl NULL
3674 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3675 struct inode
*inode
, struct inode
*dir
)
3679 static inline int btrfs_acl_chmod(struct inode
*inode
)
3686 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3687 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3688 struct btrfs_root
*root
);
3689 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3690 struct btrfs_root
*root
);
3691 int btrfs_recover_relocation(struct btrfs_root
*root
);
3692 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3693 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3694 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3695 struct extent_buffer
*cow
);
3696 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3697 struct btrfs_pending_snapshot
*pending
,
3698 u64
*bytes_to_reserve
);
3699 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3700 struct btrfs_pending_snapshot
*pending
);
3703 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3704 u64 end
, struct btrfs_scrub_progress
*progress
,
3705 int readonly
, int is_dev_replace
);
3706 void btrfs_scrub_pause(struct btrfs_root
*root
);
3707 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3708 void btrfs_scrub_continue(struct btrfs_root
*root
);
3709 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3710 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3711 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3712 struct btrfs_device
*dev
);
3713 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3714 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3715 struct btrfs_scrub_progress
*progress
);
3718 struct reada_control
{
3719 struct btrfs_root
*root
; /* tree to prefetch */
3720 struct btrfs_key key_start
;
3721 struct btrfs_key key_end
; /* exclusive */
3724 wait_queue_head_t wait
;
3726 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3727 struct btrfs_key
*start
, struct btrfs_key
*end
);
3728 int btrfs_reada_wait(void *handle
);
3729 void btrfs_reada_detach(void *handle
);
3730 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3731 u64 start
, int err
);
3734 struct qgroup_update
{
3735 struct list_head list
;
3736 struct btrfs_delayed_ref_node
*node
;
3737 struct btrfs_delayed_extent_op
*extent_op
;
3740 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
3741 struct btrfs_fs_info
*fs_info
);
3742 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
3743 struct btrfs_fs_info
*fs_info
);
3744 int btrfs_quota_rescan(struct btrfs_fs_info
*fs_info
);
3745 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
3746 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3747 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
3748 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3749 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
3750 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3752 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
3753 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
3754 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
3755 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3756 struct btrfs_qgroup_limit
*limit
);
3757 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
3758 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
3759 struct btrfs_delayed_extent_op
;
3760 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
3761 struct btrfs_delayed_ref_node
*node
,
3762 struct btrfs_delayed_extent_op
*extent_op
);
3763 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
3764 struct btrfs_fs_info
*fs_info
,
3765 struct btrfs_delayed_ref_node
*node
,
3766 struct btrfs_delayed_extent_op
*extent_op
);
3767 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
3768 struct btrfs_fs_info
*fs_info
);
3769 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
3770 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
3771 struct btrfs_qgroup_inherit
*inherit
);
3772 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
3773 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
3775 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
3777 static inline int is_fstree(u64 rootid
)
3779 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3780 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)