2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 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))
195 * The key defines the order in the tree, and so it also defines (optimal)
198 * objectid corresponds to the inode number.
200 * type tells us things about the object, and is a kind of stream selector.
201 * so for a given inode, keys with type of 1 might refer to the inode data,
202 * type of 2 may point to file data in the btree and type == 3 may point to
205 * offset is the starting byte offset for this key in the stream.
207 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
208 * in cpu native order. Otherwise they are identical and their sizes
209 * should be the same (ie both packed)
211 struct btrfs_disk_key
{
215 } __attribute__ ((__packed__
));
221 } __attribute__ ((__packed__
));
223 struct btrfs_mapping_tree
{
224 struct extent_map_tree map_tree
;
227 struct btrfs_dev_item
{
228 /* the internal btrfs device id */
231 /* size of the device */
237 /* optimal io alignment for this device */
240 /* optimal io width for this device */
243 /* minimal io size for this device */
246 /* type and info about this device */
249 /* expected generation for this device */
253 * starting byte of this partition on the device,
254 * to allow for stripe alignment in the future
258 /* grouping information for allocation decisions */
261 /* seek speed 0-100 where 100 is fastest */
264 /* bandwidth 0-100 where 100 is fastest */
267 /* btrfs generated uuid for this device */
268 u8 uuid
[BTRFS_UUID_SIZE
];
270 /* uuid of FS who owns this device */
271 u8 fsid
[BTRFS_UUID_SIZE
];
272 } __attribute__ ((__packed__
));
274 struct btrfs_stripe
{
277 u8 dev_uuid
[BTRFS_UUID_SIZE
];
278 } __attribute__ ((__packed__
));
281 /* size of this chunk in bytes */
284 /* objectid of the root referencing this chunk */
290 /* optimal io alignment for this chunk */
293 /* optimal io width for this chunk */
296 /* minimal io size for this chunk */
299 /* 2^16 stripes is quite a lot, a second limit is the size of a single
304 /* sub stripes only matter for raid10 */
306 struct btrfs_stripe stripe
;
307 /* additional stripes go here */
308 } __attribute__ ((__packed__
));
310 #define BTRFS_FREE_SPACE_EXTENT 1
311 #define BTRFS_FREE_SPACE_BITMAP 2
313 struct btrfs_free_space_entry
{
317 } __attribute__ ((__packed__
));
319 struct btrfs_free_space_header
{
320 struct btrfs_disk_key location
;
324 } __attribute__ ((__packed__
));
326 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
328 BUG_ON(num_stripes
== 0);
329 return sizeof(struct btrfs_chunk
) +
330 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
333 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
334 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
340 /* Errors detected */
341 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
343 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
344 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
346 #define BTRFS_BACKREF_REV_MAX 256
347 #define BTRFS_BACKREF_REV_SHIFT 56
348 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
349 BTRFS_BACKREF_REV_SHIFT)
351 #define BTRFS_OLD_BACKREF_REV 0
352 #define BTRFS_MIXED_BACKREF_REV 1
355 * every tree block (leaf or node) starts with this header.
357 struct btrfs_header
{
358 /* these first four must match the super block */
359 u8 csum
[BTRFS_CSUM_SIZE
];
360 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
361 __le64 bytenr
; /* which block this node is supposed to live in */
364 /* allowed to be different from the super from here on down */
365 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
370 } __attribute__ ((__packed__
));
372 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
373 sizeof(struct btrfs_header)) / \
374 sizeof(struct btrfs_key_ptr))
375 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
376 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
377 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
378 sizeof(struct btrfs_item) - \
379 sizeof(struct btrfs_file_extent_item))
380 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
381 sizeof(struct btrfs_item) -\
382 sizeof(struct btrfs_dir_item))
386 * this is a very generous portion of the super block, giving us
387 * room to translate 14 chunks with 3 stripes each.
389 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
390 #define BTRFS_LABEL_SIZE 256
393 * just in case we somehow lose the roots and are not able to mount,
394 * we store an array of the roots from previous transactions
397 #define BTRFS_NUM_BACKUP_ROOTS 4
398 struct btrfs_root_backup
{
400 __le64 tree_root_gen
;
403 __le64 chunk_root_gen
;
406 __le64 extent_root_gen
;
415 __le64 csum_root_gen
;
425 u8 extent_root_level
;
429 /* future and to align */
431 } __attribute__ ((__packed__
));
434 * the super block basically lists the main trees of the FS
435 * it currently lacks any block count etc etc
437 struct btrfs_super_block
{
438 u8 csum
[BTRFS_CSUM_SIZE
];
439 /* the first 4 fields must match struct btrfs_header */
440 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
441 __le64 bytenr
; /* this block number */
444 /* allowed to be different from the btrfs_header from here own down */
451 /* this will help find the new super based on the log root */
452 __le64 log_root_transid
;
455 __le64 root_dir_objectid
;
461 __le32 sys_chunk_array_size
;
462 __le64 chunk_root_generation
;
464 __le64 compat_ro_flags
;
465 __le64 incompat_flags
;
470 struct btrfs_dev_item dev_item
;
472 char label
[BTRFS_LABEL_SIZE
];
474 __le64 cache_generation
;
476 /* future expansion */
478 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
479 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
480 } __attribute__ ((__packed__
));
483 * Compat flags that we support. If any incompat flags are set other than the
484 * ones specified below then we will fail to mount
486 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
487 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
488 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
489 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
491 * some patches floated around with a second compression method
492 * lets save that incompat here for when they do get in
493 * Note we don't actually support it, we're just reserving the
496 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
499 * older kernels tried to do bigger metadata blocks, but the
500 * code was pretty buggy. Lets not let them try anymore.
502 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
504 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
505 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
507 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
508 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
509 #define BTRFS_FEATURE_INCOMPAT_SUPP \
510 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
511 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
512 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
513 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
514 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
515 BTRFS_FEATURE_INCOMPAT_RAID56 | \
516 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
519 * A leaf is full of items. offset and size tell us where to find
520 * the item in the leaf (relative to the start of the data area)
523 struct btrfs_disk_key key
;
526 } __attribute__ ((__packed__
));
529 * leaves have an item area and a data area:
530 * [item0, item1....itemN] [free space] [dataN...data1, data0]
532 * The data is separate from the items to get the keys closer together
536 struct btrfs_header header
;
537 struct btrfs_item items
[];
538 } __attribute__ ((__packed__
));
541 * all non-leaf blocks are nodes, they hold only keys and pointers to
544 struct btrfs_key_ptr
{
545 struct btrfs_disk_key key
;
548 } __attribute__ ((__packed__
));
551 struct btrfs_header header
;
552 struct btrfs_key_ptr ptrs
[];
553 } __attribute__ ((__packed__
));
556 * btrfs_paths remember the path taken from the root down to the leaf.
557 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
558 * to any other levels that are present.
560 * The slots array records the index of the item or block pointer
561 * used while walking the tree.
564 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
565 int slots
[BTRFS_MAX_LEVEL
];
566 /* if there is real range locking, this locks field will change */
567 int locks
[BTRFS_MAX_LEVEL
];
569 /* keep some upper locks as we walk down */
573 * set by btrfs_split_item, tells search_slot to keep all locks
574 * and to force calls to keep space in the nodes
576 unsigned int search_for_split
:1;
577 unsigned int keep_locks
:1;
578 unsigned int skip_locking
:1;
579 unsigned int leave_spinning
:1;
580 unsigned int search_commit_root
:1;
581 unsigned int really_keep_locks
:1;
585 * items in the extent btree are used to record the objectid of the
586 * owner of the block and the number of references
589 struct btrfs_extent_item
{
593 } __attribute__ ((__packed__
));
595 struct btrfs_extent_item_v0
{
597 } __attribute__ ((__packed__
));
599 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
600 sizeof(struct btrfs_item))
602 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
603 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
605 /* following flags only apply to tree blocks */
607 /* use full backrefs for extent pointers in the block */
608 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
611 * this flag is only used internally by scrub and may be changed at any time
612 * it is only declared here to avoid collisions
614 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
616 struct btrfs_tree_block_info
{
617 struct btrfs_disk_key key
;
619 } __attribute__ ((__packed__
));
621 struct btrfs_extent_data_ref
{
626 } __attribute__ ((__packed__
));
628 struct btrfs_shared_data_ref
{
630 } __attribute__ ((__packed__
));
632 struct btrfs_extent_inline_ref
{
635 } __attribute__ ((__packed__
));
637 /* old style backrefs item */
638 struct btrfs_extent_ref_v0
{
643 } __attribute__ ((__packed__
));
646 /* dev extents record free space on individual devices. The owner
647 * field points back to the chunk allocation mapping tree that allocated
648 * the extent. The chunk tree uuid field is a way to double check the owner
650 struct btrfs_dev_extent
{
652 __le64 chunk_objectid
;
655 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
656 } __attribute__ ((__packed__
));
658 struct btrfs_inode_ref
{
662 } __attribute__ ((__packed__
));
664 struct btrfs_inode_extref
{
665 __le64 parent_objectid
;
670 } __attribute__ ((__packed__
));
672 struct btrfs_timespec
{
675 } __attribute__ ((__packed__
));
677 enum btrfs_compression_type
{
678 BTRFS_COMPRESS_NONE
= 0,
679 BTRFS_COMPRESS_ZLIB
= 1,
680 BTRFS_COMPRESS_LZO
= 2,
681 BTRFS_COMPRESS_TYPES
= 2,
682 BTRFS_COMPRESS_LAST
= 3,
685 struct btrfs_inode_item
{
686 /* nfs style generation number */
688 /* transid that last touched this inode */
700 /* modification sequence number for NFS */
704 * a little future expansion, for more than this we can
705 * just grow the inode item and version it
708 struct btrfs_timespec atime
;
709 struct btrfs_timespec ctime
;
710 struct btrfs_timespec mtime
;
711 struct btrfs_timespec otime
;
712 } __attribute__ ((__packed__
));
714 struct btrfs_dir_log_item
{
716 } __attribute__ ((__packed__
));
718 struct btrfs_dir_item
{
719 struct btrfs_disk_key location
;
724 } __attribute__ ((__packed__
));
726 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
728 struct btrfs_root_item
{
729 struct btrfs_inode_item inode
;
735 __le64 last_snapshot
;
738 struct btrfs_disk_key drop_progress
;
743 * The following fields appear after subvol_uuids+subvol_times
748 * This generation number is used to test if the new fields are valid
749 * and up to date while reading the root item. Everytime the root item
750 * is written out, the "generation" field is copied into this field. If
751 * anyone ever mounted the fs with an older kernel, we will have
752 * mismatching generation values here and thus must invalidate the
753 * new fields. See btrfs_update_root and btrfs_find_last_root for
755 * the offset of generation_v2 is also used as the start for the memset
756 * when invalidating the fields.
758 __le64 generation_v2
;
759 u8 uuid
[BTRFS_UUID_SIZE
];
760 u8 parent_uuid
[BTRFS_UUID_SIZE
];
761 u8 received_uuid
[BTRFS_UUID_SIZE
];
762 __le64 ctransid
; /* updated when an inode changes */
763 __le64 otransid
; /* trans when created */
764 __le64 stransid
; /* trans when sent. non-zero for received subvol */
765 __le64 rtransid
; /* trans when received. non-zero for received subvol */
766 struct btrfs_timespec ctime
;
767 struct btrfs_timespec otime
;
768 struct btrfs_timespec stime
;
769 struct btrfs_timespec rtime
;
770 __le64 reserved
[8]; /* for future */
771 } __attribute__ ((__packed__
));
774 * this is used for both forward and backward root refs
776 struct btrfs_root_ref
{
780 } __attribute__ ((__packed__
));
782 struct btrfs_disk_balance_args
{
784 * profiles to operate on, single is denoted by
785 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
795 /* devid subset filter [pstart..pend) */
799 /* btrfs virtual address space subset filter [vstart..vend) */
804 * profile to convert to, single is denoted by
805 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
809 /* BTRFS_BALANCE_ARGS_* */
813 } __attribute__ ((__packed__
));
816 * store balance parameters to disk so that balance can be properly
817 * resumed after crash or unmount
819 struct btrfs_balance_item
{
820 /* BTRFS_BALANCE_* */
823 struct btrfs_disk_balance_args data
;
824 struct btrfs_disk_balance_args meta
;
825 struct btrfs_disk_balance_args sys
;
828 } __attribute__ ((__packed__
));
830 #define BTRFS_FILE_EXTENT_INLINE 0
831 #define BTRFS_FILE_EXTENT_REG 1
832 #define BTRFS_FILE_EXTENT_PREALLOC 2
834 struct btrfs_file_extent_item
{
836 * transaction id that created this extent
840 * max number of bytes to hold this extent in ram
841 * when we split a compressed extent we can't know how big
842 * each of the resulting pieces will be. So, this is
843 * an upper limit on the size of the extent in ram instead of
849 * 32 bits for the various ways we might encode the data,
850 * including compression and encryption. If any of these
851 * are set to something a given disk format doesn't understand
852 * it is treated like an incompat flag for reading and writing,
857 __le16 other_encoding
; /* spare for later use */
859 /* are we inline data or a real extent? */
863 * disk space consumed by the extent, checksum blocks are included
867 __le64 disk_num_bytes
;
869 * the logical offset in file blocks (no csums)
870 * this extent record is for. This allows a file extent to point
871 * into the middle of an existing extent on disk, sharing it
872 * between two snapshots (useful if some bytes in the middle of the
873 * extent have changed
877 * the logical number of file blocks (no csums included). This
878 * always reflects the size uncompressed and without encoding.
882 } __attribute__ ((__packed__
));
884 struct btrfs_csum_item
{
886 } __attribute__ ((__packed__
));
888 struct btrfs_dev_stats_item
{
890 * grow this item struct at the end for future enhancements and keep
891 * the existing values unchanged
893 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
894 } __attribute__ ((__packed__
));
896 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
897 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
898 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
899 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
900 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
901 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
902 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
904 struct btrfs_dev_replace
{
905 u64 replace_state
; /* see #define above */
906 u64 time_started
; /* seconds since 1-Jan-1970 */
907 u64 time_stopped
; /* seconds since 1-Jan-1970 */
908 atomic64_t num_write_errors
;
909 atomic64_t num_uncorrectable_read_errors
;
912 u64 committed_cursor_left
;
913 u64 cursor_left_last_write_of_item
;
916 u64 cont_reading_from_srcdev_mode
; /* see #define above */
919 int item_needs_writeback
;
920 struct btrfs_device
*srcdev
;
921 struct btrfs_device
*tgtdev
;
924 atomic_t nesting_level
;
925 struct mutex lock_finishing_cancel_unmount
;
926 struct mutex lock_management_lock
;
929 struct btrfs_scrub_progress scrub_progress
;
932 struct btrfs_dev_replace_item
{
934 * grow this item struct at the end for future enhancements and keep
935 * the existing values unchanged
940 __le64 cont_reading_from_srcdev_mode
;
942 __le64 replace_state
;
945 __le64 num_write_errors
;
946 __le64 num_uncorrectable_read_errors
;
947 } __attribute__ ((__packed__
));
949 /* different types of block groups (and chunks) */
950 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
951 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
952 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
953 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
954 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
955 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
956 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
957 #define BTRFS_BLOCK_GROUP_RAID5 (1 << 7)
958 #define BTRFS_BLOCK_GROUP_RAID6 (1 << 8)
959 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
960 #define BTRFS_NR_RAID_TYPES 7
962 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
963 BTRFS_BLOCK_GROUP_SYSTEM | \
964 BTRFS_BLOCK_GROUP_METADATA)
966 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
967 BTRFS_BLOCK_GROUP_RAID1 | \
968 BTRFS_BLOCK_GROUP_RAID5 | \
969 BTRFS_BLOCK_GROUP_RAID6 | \
970 BTRFS_BLOCK_GROUP_DUP | \
971 BTRFS_BLOCK_GROUP_RAID10)
973 * We need a bit for restriper to be able to tell when chunks of type
974 * SINGLE are available. This "extended" profile format is used in
975 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
976 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
977 * to avoid remappings between two formats in future.
979 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
981 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
982 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
984 static inline u64
chunk_to_extended(u64 flags
)
986 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
987 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
991 static inline u64
extended_to_chunk(u64 flags
)
993 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
996 struct btrfs_block_group_item
{
998 __le64 chunk_objectid
;
1000 } __attribute__ ((__packed__
));
1003 * is subvolume quota turned on?
1005 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1007 * SCANNING is set during the initialization phase
1009 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1011 * Some qgroup entries are known to be out of date,
1012 * either because the configuration has changed in a way that
1013 * makes a rescan necessary, or because the fs has been mounted
1014 * with a non-qgroup-aware version.
1015 * Turning qouta off and on again makes it inconsistent, too.
1017 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1019 #define BTRFS_QGROUP_STATUS_VERSION 1
1021 struct btrfs_qgroup_status_item
{
1024 * the generation is updated during every commit. As older
1025 * versions of btrfs are not aware of qgroups, it will be
1026 * possible to detect inconsistencies by checking the
1027 * generation on mount time
1031 /* flag definitions see above */
1035 * only used during scanning to record the progress
1036 * of the scan. It contains a logical address
1039 } __attribute__ ((__packed__
));
1041 struct btrfs_qgroup_info_item
{
1047 } __attribute__ ((__packed__
));
1049 /* flags definition for qgroup limits */
1050 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1051 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1052 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1053 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1054 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1055 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1057 struct btrfs_qgroup_limit_item
{
1059 * only updated when any of the other values change
1066 } __attribute__ ((__packed__
));
1068 struct btrfs_space_info
{
1071 u64 total_bytes
; /* total bytes in the space,
1072 this doesn't take mirrors into account */
1073 u64 bytes_used
; /* total bytes used,
1074 this doesn't take mirrors into account */
1075 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1076 transaction finishes */
1077 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1078 current allocations */
1079 u64 bytes_readonly
; /* total bytes that are read only */
1081 u64 bytes_may_use
; /* number of bytes that may be used for
1082 delalloc/allocations */
1083 u64 disk_used
; /* total bytes used on disk */
1084 u64 disk_total
; /* total bytes on disk, takes mirrors into
1088 * we bump reservation progress every time we decrement
1089 * bytes_reserved. This way people waiting for reservations
1090 * know something good has happened and they can check
1091 * for progress. The number here isn't to be trusted, it
1092 * just shows reclaim activity
1094 unsigned long reservation_progress
;
1096 unsigned int full
:1; /* indicates that we cannot allocate any more
1097 chunks for this space */
1098 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1100 unsigned int flush
:1; /* set if we are trying to make space */
1102 unsigned int force_alloc
; /* set if we need to force a chunk
1103 alloc for this space */
1105 struct list_head list
;
1107 /* for block groups in our same type */
1108 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1110 struct rw_semaphore groups_sem
;
1111 wait_queue_head_t wait
;
1114 #define BTRFS_BLOCK_RSV_GLOBAL 1
1115 #define BTRFS_BLOCK_RSV_DELALLOC 2
1116 #define BTRFS_BLOCK_RSV_TRANS 3
1117 #define BTRFS_BLOCK_RSV_CHUNK 4
1118 #define BTRFS_BLOCK_RSV_DELOPS 5
1119 #define BTRFS_BLOCK_RSV_EMPTY 6
1120 #define BTRFS_BLOCK_RSV_TEMP 7
1122 struct btrfs_block_rsv
{
1125 struct btrfs_space_info
*space_info
;
1127 unsigned short full
;
1128 unsigned short type
;
1129 unsigned short failfast
;
1133 * free clusters are used to claim free space in relatively large chunks,
1134 * allowing us to do less seeky writes. They are used for all metadata
1135 * allocations and data allocations in ssd mode.
1137 struct btrfs_free_cluster
{
1139 spinlock_t refill_lock
;
1140 struct rb_root root
;
1142 /* largest extent in this cluster */
1145 /* first extent starting offset */
1148 struct btrfs_block_group_cache
*block_group
;
1150 * when a cluster is allocated from a block group, we put the
1151 * cluster onto a list in the block group so that it can
1152 * be freed before the block group is freed.
1154 struct list_head block_group_list
;
1157 enum btrfs_caching_type
{
1159 BTRFS_CACHE_STARTED
= 1,
1160 BTRFS_CACHE_FAST
= 2,
1161 BTRFS_CACHE_FINISHED
= 3,
1164 enum btrfs_disk_cache_state
{
1165 BTRFS_DC_WRITTEN
= 0,
1169 BTRFS_DC_NEED_WRITE
= 4,
1172 struct btrfs_caching_control
{
1173 struct list_head list
;
1175 wait_queue_head_t wait
;
1176 struct btrfs_work work
;
1177 struct btrfs_block_group_cache
*block_group
;
1182 struct btrfs_block_group_cache
{
1183 struct btrfs_key key
;
1184 struct btrfs_block_group_item item
;
1185 struct btrfs_fs_info
*fs_info
;
1186 struct inode
*inode
;
1193 u64 cache_generation
;
1195 /* for raid56, this is a full stripe, without parity */
1196 unsigned long full_stripe_len
;
1199 unsigned int dirty
:1;
1200 unsigned int iref
:1;
1202 int disk_cache_state
;
1204 /* cache tracking stuff */
1206 struct btrfs_caching_control
*caching_ctl
;
1207 u64 last_byte_to_unpin
;
1209 struct btrfs_space_info
*space_info
;
1211 /* free space cache stuff */
1212 struct btrfs_free_space_ctl
*free_space_ctl
;
1214 /* block group cache stuff */
1215 struct rb_node cache_node
;
1217 /* for block groups in the same raid type */
1218 struct list_head list
;
1223 /* List of struct btrfs_free_clusters for this block group.
1224 * Today it will only have one thing on it, but that may change
1226 struct list_head cluster_list
;
1228 /* For delayed block group creation */
1229 struct list_head new_bg_list
;
1232 /* delayed seq elem */
1234 struct list_head list
;
1238 /* used by the raid56 code to lock stripes for read/modify/write */
1239 struct btrfs_stripe_hash
{
1240 struct list_head hash_list
;
1241 wait_queue_head_t wait
;
1245 /* used by the raid56 code to lock stripes for read/modify/write */
1246 struct btrfs_stripe_hash_table
{
1247 struct list_head stripe_cache
;
1248 spinlock_t cache_lock
;
1250 struct btrfs_stripe_hash table
[];
1253 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1256 struct reloc_control
;
1257 struct btrfs_device
;
1258 struct btrfs_fs_devices
;
1259 struct btrfs_balance_control
;
1260 struct btrfs_delayed_root
;
1261 struct btrfs_fs_info
{
1262 u8 fsid
[BTRFS_FSID_SIZE
];
1263 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1264 struct btrfs_root
*extent_root
;
1265 struct btrfs_root
*tree_root
;
1266 struct btrfs_root
*chunk_root
;
1267 struct btrfs_root
*dev_root
;
1268 struct btrfs_root
*fs_root
;
1269 struct btrfs_root
*csum_root
;
1270 struct btrfs_root
*quota_root
;
1272 /* the log root tree is a directory of all the other log roots */
1273 struct btrfs_root
*log_root_tree
;
1275 spinlock_t fs_roots_radix_lock
;
1276 struct radix_tree_root fs_roots_radix
;
1278 /* block group cache stuff */
1279 spinlock_t block_group_cache_lock
;
1280 struct rb_root block_group_cache_tree
;
1282 /* keep track of unallocated space */
1283 spinlock_t free_chunk_lock
;
1284 u64 free_chunk_space
;
1286 struct extent_io_tree freed_extents
[2];
1287 struct extent_io_tree
*pinned_extents
;
1289 /* logical->physical extent mapping */
1290 struct btrfs_mapping_tree mapping_tree
;
1293 * block reservation for extent, checksum, root tree and
1294 * delayed dir index item
1296 struct btrfs_block_rsv global_block_rsv
;
1297 /* block reservation for delay allocation */
1298 struct btrfs_block_rsv delalloc_block_rsv
;
1299 /* block reservation for metadata operations */
1300 struct btrfs_block_rsv trans_block_rsv
;
1301 /* block reservation for chunk tree */
1302 struct btrfs_block_rsv chunk_block_rsv
;
1303 /* block reservation for delayed operations */
1304 struct btrfs_block_rsv delayed_block_rsv
;
1306 struct btrfs_block_rsv empty_block_rsv
;
1309 u64 last_trans_committed
;
1312 * this is updated to the current trans every time a full commit
1313 * is required instead of the faster short fsync log commits
1315 u64 last_trans_log_full_commit
;
1316 unsigned long mount_opt
;
1317 unsigned long compress_type
:4;
1320 struct btrfs_transaction
*running_transaction
;
1321 wait_queue_head_t transaction_throttle
;
1322 wait_queue_head_t transaction_wait
;
1323 wait_queue_head_t transaction_blocked_wait
;
1324 wait_queue_head_t async_submit_wait
;
1326 struct btrfs_super_block
*super_copy
;
1327 struct btrfs_super_block
*super_for_commit
;
1328 struct block_device
*__bdev
;
1329 struct super_block
*sb
;
1330 struct inode
*btree_inode
;
1331 struct backing_dev_info bdi
;
1332 struct mutex tree_log_mutex
;
1333 struct mutex transaction_kthread_mutex
;
1334 struct mutex cleaner_mutex
;
1335 struct mutex chunk_mutex
;
1336 struct mutex volume_mutex
;
1338 /* this is used during read/modify/write to make sure
1339 * no two ios are trying to mod the same stripe at the same
1342 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1345 * this protects the ordered operations list only while we are
1346 * processing all of the entries on it. This way we make
1347 * sure the commit code doesn't find the list temporarily empty
1348 * because another function happens to be doing non-waiting preflush
1349 * before jumping into the main commit.
1351 struct mutex ordered_operations_mutex
;
1352 struct rw_semaphore extent_commit_sem
;
1354 struct rw_semaphore cleanup_work_sem
;
1356 struct rw_semaphore subvol_sem
;
1357 struct srcu_struct subvol_srcu
;
1359 spinlock_t trans_lock
;
1361 * the reloc mutex goes with the trans lock, it is taken
1362 * during commit to protect us from the relocation code
1364 struct mutex reloc_mutex
;
1366 struct list_head trans_list
;
1367 struct list_head dead_roots
;
1368 struct list_head caching_block_groups
;
1370 spinlock_t delayed_iput_lock
;
1371 struct list_head delayed_iputs
;
1373 /* this protects tree_mod_seq_list */
1374 spinlock_t tree_mod_seq_lock
;
1375 atomic_t tree_mod_seq
;
1376 struct list_head tree_mod_seq_list
;
1377 struct seq_list tree_mod_seq_elem
;
1379 /* this protects tree_mod_log */
1380 rwlock_t tree_mod_log_lock
;
1381 struct rb_root tree_mod_log
;
1383 atomic_t nr_async_submits
;
1384 atomic_t async_submit_draining
;
1385 atomic_t nr_async_bios
;
1386 atomic_t async_delalloc_pages
;
1387 atomic_t open_ioctl_trans
;
1390 * this is used by the balancing code to wait for all the pending
1393 spinlock_t ordered_extent_lock
;
1396 * all of the data=ordered extents pending writeback
1397 * these can span multiple transactions and basically include
1398 * every dirty data page that isn't from nodatacow
1400 struct list_head ordered_extents
;
1403 * all of the inodes that have delalloc bytes. It is possible for
1404 * this list to be empty even when there is still dirty data=ordered
1405 * extents waiting to finish IO.
1407 struct list_head delalloc_inodes
;
1410 * special rename and truncate targets that must be on disk before
1411 * we're allowed to commit. This is basically the ext3 style
1412 * data=ordered list.
1414 struct list_head ordered_operations
;
1417 * there is a pool of worker threads for checksumming during writes
1418 * and a pool for checksumming after reads. This is because readers
1419 * can run with FS locks held, and the writers may be waiting for
1420 * those locks. We don't want ordering in the pending list to cause
1421 * deadlocks, and so the two are serviced separately.
1423 * A third pool does submit_bio to avoid deadlocking with the other
1426 struct btrfs_workers generic_worker
;
1427 struct btrfs_workers workers
;
1428 struct btrfs_workers delalloc_workers
;
1429 struct btrfs_workers flush_workers
;
1430 struct btrfs_workers endio_workers
;
1431 struct btrfs_workers endio_meta_workers
;
1432 struct btrfs_workers endio_raid56_workers
;
1433 struct btrfs_workers rmw_workers
;
1434 struct btrfs_workers endio_meta_write_workers
;
1435 struct btrfs_workers endio_write_workers
;
1436 struct btrfs_workers endio_freespace_worker
;
1437 struct btrfs_workers submit_workers
;
1438 struct btrfs_workers caching_workers
;
1439 struct btrfs_workers readahead_workers
;
1442 * fixup workers take dirty pages that didn't properly go through
1443 * the cow mechanism and make them safe to write. It happens
1444 * for the sys_munmap function call path
1446 struct btrfs_workers fixup_workers
;
1447 struct btrfs_workers delayed_workers
;
1448 struct task_struct
*transaction_kthread
;
1449 struct task_struct
*cleaner_kthread
;
1450 int thread_pool_size
;
1452 struct kobject super_kobj
;
1453 struct completion kobj_unregister
;
1456 int log_root_recovering
;
1462 /* protected by the delalloc lock, used to keep from writing
1463 * metadata until there is a nice batch
1465 u64 dirty_metadata_bytes
;
1466 struct list_head dirty_cowonly_roots
;
1468 struct btrfs_fs_devices
*fs_devices
;
1471 * the space_info list is almost entirely read only. It only changes
1472 * when we add a new raid type to the FS, and that happens
1473 * very rarely. RCU is used to protect it.
1475 struct list_head space_info
;
1477 struct btrfs_space_info
*data_sinfo
;
1479 struct reloc_control
*reloc_ctl
;
1481 spinlock_t delalloc_lock
;
1484 /* data_alloc_cluster is only used in ssd mode */
1485 struct btrfs_free_cluster data_alloc_cluster
;
1487 /* all metadata allocations go through this cluster */
1488 struct btrfs_free_cluster meta_alloc_cluster
;
1490 /* auto defrag inodes go here */
1491 spinlock_t defrag_inodes_lock
;
1492 struct rb_root defrag_inodes
;
1493 atomic_t defrag_running
;
1496 * these three are in extended format (availability of single
1497 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1498 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1500 u64 avail_data_alloc_bits
;
1501 u64 avail_metadata_alloc_bits
;
1502 u64 avail_system_alloc_bits
;
1504 /* restriper state */
1505 spinlock_t balance_lock
;
1506 struct mutex balance_mutex
;
1507 atomic_t balance_running
;
1508 atomic_t balance_pause_req
;
1509 atomic_t balance_cancel_req
;
1510 struct btrfs_balance_control
*balance_ctl
;
1511 wait_queue_head_t balance_wait_q
;
1513 unsigned data_chunk_allocations
;
1514 unsigned metadata_ratio
;
1518 /* private scrub information */
1519 struct mutex scrub_lock
;
1520 atomic_t scrubs_running
;
1521 atomic_t scrub_pause_req
;
1522 atomic_t scrubs_paused
;
1523 atomic_t scrub_cancel_req
;
1524 wait_queue_head_t scrub_pause_wait
;
1525 struct rw_semaphore scrub_super_lock
;
1526 int scrub_workers_refcnt
;
1527 struct btrfs_workers scrub_workers
;
1528 struct btrfs_workers scrub_wr_completion_workers
;
1529 struct btrfs_workers scrub_nocow_workers
;
1531 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1532 u32 check_integrity_print_mask
;
1537 unsigned int quota_enabled
:1;
1540 * quota_enabled only changes state after a commit. This holds the
1543 unsigned int pending_quota_state
:1;
1545 /* is qgroup tracking in a consistent state? */
1548 /* holds configuration and tracking. Protected by qgroup_lock */
1549 struct rb_root qgroup_tree
;
1550 spinlock_t qgroup_lock
;
1552 /* list of dirty qgroups to be written at next commit */
1553 struct list_head dirty_qgroups
;
1555 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1558 /* filesystem state */
1561 struct btrfs_delayed_root
*delayed_root
;
1563 /* readahead tree */
1564 spinlock_t reada_lock
;
1565 struct radix_tree_root reada_tree
;
1567 /* next backup root to be overwritten */
1568 int backup_root_index
;
1570 int num_tolerated_disk_barrier_failures
;
1572 /* device replace state */
1573 struct btrfs_dev_replace dev_replace
;
1575 atomic_t mutually_exclusive_operation_running
;
1579 * in ram representation of the tree. extent_root is used for all allocations
1580 * and for the extent tree extent_root root.
1583 struct extent_buffer
*node
;
1585 struct extent_buffer
*commit_root
;
1586 struct btrfs_root
*log_root
;
1587 struct btrfs_root
*reloc_root
;
1589 struct btrfs_root_item root_item
;
1590 struct btrfs_key root_key
;
1591 struct btrfs_fs_info
*fs_info
;
1592 struct extent_io_tree dirty_log_pages
;
1594 struct kobject root_kobj
;
1595 struct completion kobj_unregister
;
1596 struct mutex objectid_mutex
;
1598 spinlock_t accounting_lock
;
1599 struct btrfs_block_rsv
*block_rsv
;
1601 /* free ino cache stuff */
1602 struct mutex fs_commit_mutex
;
1603 struct btrfs_free_space_ctl
*free_ino_ctl
;
1604 enum btrfs_caching_type cached
;
1605 spinlock_t cache_lock
;
1606 wait_queue_head_t cache_wait
;
1607 struct btrfs_free_space_ctl
*free_ino_pinned
;
1609 struct inode
*cache_inode
;
1611 struct mutex log_mutex
;
1612 wait_queue_head_t log_writer_wait
;
1613 wait_queue_head_t log_commit_wait
[2];
1614 atomic_t log_writers
;
1615 atomic_t log_commit
[2];
1617 unsigned long log_transid
;
1618 unsigned long last_log_commit
;
1619 pid_t log_start_pid
;
1620 bool log_multiple_pids
;
1625 /* data allocations are done in sectorsize units */
1628 /* node allocations are done in nodesize units */
1631 /* leaf allocations are done in leafsize units */
1638 u64 highest_objectid
;
1640 /* btrfs_record_root_in_trans is a multi-step process,
1641 * and it can race with the balancing code. But the
1642 * race is very small, and only the first time the root
1643 * is added to each transaction. So in_trans_setup
1644 * is used to tell us when more checks are required
1646 unsigned long in_trans_setup
;
1651 u64 defrag_trans_start
;
1652 struct btrfs_key defrag_progress
;
1653 struct btrfs_key defrag_max
;
1657 /* the dirty list is only used by non-reference counted roots */
1658 struct list_head dirty_list
;
1660 struct list_head root_list
;
1662 spinlock_t orphan_lock
;
1663 atomic_t orphan_inodes
;
1664 struct btrfs_block_rsv
*orphan_block_rsv
;
1665 int orphan_item_inserted
;
1666 int orphan_cleanup_state
;
1668 spinlock_t inode_lock
;
1669 /* red-black tree that keeps track of in-memory inodes */
1670 struct rb_root inode_tree
;
1673 * radix tree that keeps track of delayed nodes of every inode,
1674 * protected by inode_lock
1676 struct radix_tree_root delayed_nodes_tree
;
1678 * right now this just gets used so that a root has its own devid
1679 * for stat. It may be used for more later
1685 spinlock_t root_item_lock
;
1688 struct btrfs_ioctl_defrag_range_args
{
1689 /* start of the defrag operation */
1692 /* number of bytes to defrag, use (u64)-1 to say all */
1696 * flags for the operation, which can include turning
1697 * on compression for this one defrag
1702 * any extent bigger than this will be considered
1703 * already defragged. Use 0 to take the kernel default
1704 * Use 1 to say every single extent must be rewritten
1706 __u32 extent_thresh
;
1709 * which compression method to use if turning on compression
1710 * for this defrag operation. If unspecified, zlib will
1713 __u32 compress_type
;
1715 /* spare for later */
1721 * inode items have the data typically returned from stat and store other
1722 * info about object characteristics. There is one for every file and dir in
1725 #define BTRFS_INODE_ITEM_KEY 1
1726 #define BTRFS_INODE_REF_KEY 12
1727 #define BTRFS_INODE_EXTREF_KEY 13
1728 #define BTRFS_XATTR_ITEM_KEY 24
1729 #define BTRFS_ORPHAN_ITEM_KEY 48
1730 /* reserve 2-15 close to the inode for later flexibility */
1733 * dir items are the name -> inode pointers in a directory. There is one
1734 * for every name in a directory.
1736 #define BTRFS_DIR_LOG_ITEM_KEY 60
1737 #define BTRFS_DIR_LOG_INDEX_KEY 72
1738 #define BTRFS_DIR_ITEM_KEY 84
1739 #define BTRFS_DIR_INDEX_KEY 96
1741 * extent data is for file data
1743 #define BTRFS_EXTENT_DATA_KEY 108
1746 * extent csums are stored in a separate tree and hold csums for
1747 * an entire extent on disk.
1749 #define BTRFS_EXTENT_CSUM_KEY 128
1752 * root items point to tree roots. They are typically in the root
1753 * tree used by the super block to find all the other trees
1755 #define BTRFS_ROOT_ITEM_KEY 132
1758 * root backrefs tie subvols and snapshots to the directory entries that
1761 #define BTRFS_ROOT_BACKREF_KEY 144
1764 * root refs make a fast index for listing all of the snapshots and
1765 * subvolumes referenced by a given root. They point directly to the
1766 * directory item in the root that references the subvol
1768 #define BTRFS_ROOT_REF_KEY 156
1771 * extent items are in the extent map tree. These record which blocks
1772 * are used, and how many references there are to each block
1774 #define BTRFS_EXTENT_ITEM_KEY 168
1776 #define BTRFS_TREE_BLOCK_REF_KEY 176
1778 #define BTRFS_EXTENT_DATA_REF_KEY 178
1780 #define BTRFS_EXTENT_REF_V0_KEY 180
1782 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1784 #define BTRFS_SHARED_DATA_REF_KEY 184
1787 * block groups give us hints into the extent allocation trees. Which
1788 * blocks are free etc etc
1790 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1792 #define BTRFS_DEV_EXTENT_KEY 204
1793 #define BTRFS_DEV_ITEM_KEY 216
1794 #define BTRFS_CHUNK_ITEM_KEY 228
1797 * Records the overall state of the qgroups.
1798 * There's only one instance of this key present,
1799 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1801 #define BTRFS_QGROUP_STATUS_KEY 240
1803 * Records the currently used space of the qgroup.
1804 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1806 #define BTRFS_QGROUP_INFO_KEY 242
1808 * Contains the user configured limits for the qgroup.
1809 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1811 #define BTRFS_QGROUP_LIMIT_KEY 244
1813 * Records the child-parent relationship of qgroups. For
1814 * each relation, 2 keys are present:
1815 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1816 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1818 #define BTRFS_QGROUP_RELATION_KEY 246
1820 #define BTRFS_BALANCE_ITEM_KEY 248
1823 * Persistantly stores the io stats in the device tree.
1824 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1826 #define BTRFS_DEV_STATS_KEY 249
1829 * Persistantly stores the device replace state in the device tree.
1830 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1832 #define BTRFS_DEV_REPLACE_KEY 250
1835 * string items are for debugging. They just store a short string of
1838 #define BTRFS_STRING_ITEM_KEY 253
1841 * Flags for mount options.
1843 * Note: don't forget to add new options to btrfs_show_options()
1845 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1846 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1847 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1848 #define BTRFS_MOUNT_SSD (1 << 3)
1849 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1850 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1851 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1852 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1853 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1854 #define BTRFS_MOUNT_NOSSD (1 << 9)
1855 #define BTRFS_MOUNT_DISCARD (1 << 10)
1856 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1857 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1858 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1859 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1860 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1861 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1862 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1863 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1864 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1865 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1866 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1867 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1869 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1870 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1871 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1876 #define BTRFS_INODE_NODATASUM (1 << 0)
1877 #define BTRFS_INODE_NODATACOW (1 << 1)
1878 #define BTRFS_INODE_READONLY (1 << 2)
1879 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1880 #define BTRFS_INODE_PREALLOC (1 << 4)
1881 #define BTRFS_INODE_SYNC (1 << 5)
1882 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1883 #define BTRFS_INODE_APPEND (1 << 7)
1884 #define BTRFS_INODE_NODUMP (1 << 8)
1885 #define BTRFS_INODE_NOATIME (1 << 9)
1886 #define BTRFS_INODE_DIRSYNC (1 << 10)
1887 #define BTRFS_INODE_COMPRESS (1 << 11)
1889 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1891 struct btrfs_map_token
{
1892 struct extent_buffer
*eb
;
1894 unsigned long offset
;
1897 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1899 token
->kaddr
= NULL
;
1902 /* some macros to generate set/get funcs for the struct fields. This
1903 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1906 #define le8_to_cpu(v) (v)
1907 #define cpu_to_le8(v) (v)
1910 #define read_eb_member(eb, ptr, type, member, result) ( \
1911 read_extent_buffer(eb, (char *)(result), \
1912 ((unsigned long)(ptr)) + \
1913 offsetof(type, member), \
1914 sizeof(((type *)0)->member)))
1916 #define write_eb_member(eb, ptr, type, member, result) ( \
1917 write_extent_buffer(eb, (char *)(result), \
1918 ((unsigned long)(ptr)) + \
1919 offsetof(type, member), \
1920 sizeof(((type *)0)->member)))
1922 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1923 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1924 unsigned long off, \
1925 struct btrfs_map_token *token); \
1926 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1927 unsigned long off, u##bits val, \
1928 struct btrfs_map_token *token); \
1929 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1930 unsigned long off) \
1932 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1934 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1935 unsigned long off, u##bits val) \
1937 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1940 DECLARE_BTRFS_SETGET_BITS(8)
1941 DECLARE_BTRFS_SETGET_BITS(16)
1942 DECLARE_BTRFS_SETGET_BITS(32)
1943 DECLARE_BTRFS_SETGET_BITS(64)
1945 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1946 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1948 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1949 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1951 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1954 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1955 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1957 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1958 struct btrfs_map_token *token) \
1960 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1961 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1963 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1964 type *s, u##bits val, \
1965 struct btrfs_map_token *token) \
1967 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1968 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1971 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1972 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1974 type *p = page_address(eb->pages[0]); \
1975 u##bits res = le##bits##_to_cpu(p->member); \
1978 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1981 type *p = page_address(eb->pages[0]); \
1982 p->member = cpu_to_le##bits(val); \
1985 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1986 static inline u##bits btrfs_##name(type *s) \
1988 return le##bits##_to_cpu(s->member); \
1990 static inline void btrfs_set_##name(type *s, u##bits val) \
1992 s->member = cpu_to_le##bits(val); \
1995 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1996 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1997 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1998 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1999 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2000 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2002 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2003 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2004 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2005 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2006 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2007 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2009 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2010 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2012 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2014 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2016 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2018 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2020 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2021 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2023 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2025 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2027 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2030 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
2032 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2035 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
2037 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2040 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2041 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2042 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2043 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2044 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2045 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2046 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2047 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2048 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2049 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2050 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2052 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2054 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2057 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2058 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2059 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2061 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2063 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2065 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2067 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2068 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2070 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2072 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2073 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2075 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2078 unsigned long offset
= (unsigned long)c
;
2079 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2080 offset
+= nr
* sizeof(struct btrfs_stripe
);
2081 return (struct btrfs_stripe
*)offset
;
2084 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2086 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2089 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2090 struct btrfs_chunk
*c
, int nr
)
2092 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2095 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2096 struct btrfs_chunk
*c
, int nr
)
2098 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2101 /* struct btrfs_block_group_item */
2102 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2104 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2106 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2107 struct btrfs_block_group_item
, chunk_objectid
, 64);
2109 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2110 struct btrfs_block_group_item
, chunk_objectid
, 64);
2111 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2112 struct btrfs_block_group_item
, flags
, 64);
2113 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2114 struct btrfs_block_group_item
, flags
, 64);
2116 /* struct btrfs_inode_ref */
2117 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2118 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2120 /* struct btrfs_inode_extref */
2121 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2122 parent_objectid
, 64);
2123 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2125 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2127 /* struct btrfs_inode_item */
2128 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2129 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2130 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2131 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2132 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2133 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2134 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2135 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2136 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2137 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2138 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2139 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2141 static inline struct btrfs_timespec
*
2142 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2144 unsigned long ptr
= (unsigned long)inode_item
;
2145 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2146 return (struct btrfs_timespec
*)ptr
;
2149 static inline struct btrfs_timespec
*
2150 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2152 unsigned long ptr
= (unsigned long)inode_item
;
2153 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2154 return (struct btrfs_timespec
*)ptr
;
2157 static inline struct btrfs_timespec
*
2158 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2160 unsigned long ptr
= (unsigned long)inode_item
;
2161 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2162 return (struct btrfs_timespec
*)ptr
;
2165 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2166 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2168 /* struct btrfs_dev_extent */
2169 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2171 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2172 chunk_objectid
, 64);
2173 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2175 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2177 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2179 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2180 return (u8
*)((unsigned long)dev
+ ptr
);
2183 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2184 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2186 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2188 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2191 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2193 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2194 struct btrfs_tree_block_info
*item
,
2195 struct btrfs_disk_key
*key
)
2197 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2200 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2201 struct btrfs_tree_block_info
*item
,
2202 struct btrfs_disk_key
*key
)
2204 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2207 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2209 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2211 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2213 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2216 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2219 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2221 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2224 static inline u32
btrfs_extent_inline_ref_size(int type
)
2226 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2227 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2228 return sizeof(struct btrfs_extent_inline_ref
);
2229 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2230 return sizeof(struct btrfs_shared_data_ref
) +
2231 sizeof(struct btrfs_extent_inline_ref
);
2232 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2233 return sizeof(struct btrfs_extent_data_ref
) +
2234 offsetof(struct btrfs_extent_inline_ref
, offset
);
2239 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2240 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2242 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2243 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2245 /* struct btrfs_node */
2246 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2247 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2249 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2252 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2253 sizeof(struct btrfs_key_ptr
) * nr
;
2254 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2257 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2261 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2262 sizeof(struct btrfs_key_ptr
) * nr
;
2263 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2266 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2269 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2270 sizeof(struct btrfs_key_ptr
) * nr
;
2271 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2274 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2278 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2279 sizeof(struct btrfs_key_ptr
) * nr
;
2280 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2283 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2285 return offsetof(struct btrfs_node
, ptrs
) +
2286 sizeof(struct btrfs_key_ptr
) * nr
;
2289 void btrfs_node_key(struct extent_buffer
*eb
,
2290 struct btrfs_disk_key
*disk_key
, int nr
);
2292 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2293 struct btrfs_disk_key
*disk_key
, int nr
)
2296 ptr
= btrfs_node_key_ptr_offset(nr
);
2297 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2298 struct btrfs_key_ptr
, key
, disk_key
);
2301 /* struct btrfs_item */
2302 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2303 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2305 static inline unsigned long btrfs_item_nr_offset(int nr
)
2307 return offsetof(struct btrfs_leaf
, items
) +
2308 sizeof(struct btrfs_item
) * nr
;
2311 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
2314 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2317 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2318 struct btrfs_item
*item
)
2320 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2323 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2325 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
2328 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2330 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
2333 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2335 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
2338 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2339 struct btrfs_disk_key
*disk_key
, int nr
)
2341 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2342 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2345 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2346 struct btrfs_disk_key
*disk_key
, int nr
)
2348 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2349 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2352 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2355 * struct btrfs_root_ref
2357 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2358 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2359 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2361 /* struct btrfs_dir_item */
2362 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2363 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2364 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2365 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2367 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2368 struct btrfs_dir_item
*item
,
2369 struct btrfs_disk_key
*key
)
2371 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2374 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2375 struct btrfs_dir_item
*item
,
2376 struct btrfs_disk_key
*key
)
2378 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2381 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2383 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2385 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2388 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2389 struct btrfs_free_space_header
*h
,
2390 struct btrfs_disk_key
*key
)
2392 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2395 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2396 struct btrfs_free_space_header
*h
,
2397 struct btrfs_disk_key
*key
)
2399 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2402 /* struct btrfs_disk_key */
2403 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2405 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2406 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2408 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2409 struct btrfs_disk_key
*disk
)
2411 cpu
->offset
= le64_to_cpu(disk
->offset
);
2412 cpu
->type
= disk
->type
;
2413 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2416 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2417 struct btrfs_key
*cpu
)
2419 disk
->offset
= cpu_to_le64(cpu
->offset
);
2420 disk
->type
= cpu
->type
;
2421 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2424 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2425 struct btrfs_key
*key
, int nr
)
2427 struct btrfs_disk_key disk_key
;
2428 btrfs_node_key(eb
, &disk_key
, nr
);
2429 btrfs_disk_key_to_cpu(key
, &disk_key
);
2432 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2433 struct btrfs_key
*key
, int nr
)
2435 struct btrfs_disk_key disk_key
;
2436 btrfs_item_key(eb
, &disk_key
, nr
);
2437 btrfs_disk_key_to_cpu(key
, &disk_key
);
2440 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2441 struct btrfs_dir_item
*item
,
2442 struct btrfs_key
*key
)
2444 struct btrfs_disk_key disk_key
;
2445 btrfs_dir_item_key(eb
, item
, &disk_key
);
2446 btrfs_disk_key_to_cpu(key
, &disk_key
);
2450 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2455 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2460 /* struct btrfs_header */
2461 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2462 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2464 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2465 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2466 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2467 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2469 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2471 return (btrfs_header_flags(eb
) & flag
) == flag
;
2474 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2476 u64 flags
= btrfs_header_flags(eb
);
2477 btrfs_set_header_flags(eb
, flags
| flag
);
2478 return (flags
& flag
) == flag
;
2481 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2483 u64 flags
= btrfs_header_flags(eb
);
2484 btrfs_set_header_flags(eb
, flags
& ~flag
);
2485 return (flags
& flag
) == flag
;
2488 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2490 u64 flags
= btrfs_header_flags(eb
);
2491 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2494 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2497 u64 flags
= btrfs_header_flags(eb
);
2498 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2499 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2500 btrfs_set_header_flags(eb
, flags
);
2503 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2505 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2509 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2511 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2515 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2517 return btrfs_header_level(eb
) == 0;
2520 /* struct btrfs_root_item */
2521 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2523 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2524 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2525 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2527 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2529 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2530 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2531 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2532 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2533 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2534 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2535 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2536 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2538 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2540 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2542 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2544 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2546 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2549 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2551 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2554 /* struct btrfs_root_backup */
2555 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2557 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2559 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2560 tree_root_level
, 8);
2562 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2564 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2565 chunk_root_gen
, 64);
2566 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2567 chunk_root_level
, 8);
2569 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2571 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2572 extent_root_gen
, 64);
2573 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2574 extent_root_level
, 8);
2576 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2578 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2580 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2583 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2585 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2587 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2590 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2592 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2594 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2595 csum_root_level
, 8);
2596 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2598 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2600 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2603 /* struct btrfs_balance_item */
2604 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2606 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2607 struct btrfs_balance_item
*bi
,
2608 struct btrfs_disk_balance_args
*ba
)
2610 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2613 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2614 struct btrfs_balance_item
*bi
,
2615 struct btrfs_disk_balance_args
*ba
)
2617 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2620 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2621 struct btrfs_balance_item
*bi
,
2622 struct btrfs_disk_balance_args
*ba
)
2624 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2627 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2628 struct btrfs_balance_item
*bi
,
2629 struct btrfs_disk_balance_args
*ba
)
2631 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2634 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2635 struct btrfs_balance_item
*bi
,
2636 struct btrfs_disk_balance_args
*ba
)
2638 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2641 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2642 struct btrfs_balance_item
*bi
,
2643 struct btrfs_disk_balance_args
*ba
)
2645 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2649 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2650 struct btrfs_disk_balance_args
*disk
)
2652 memset(cpu
, 0, sizeof(*cpu
));
2654 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2655 cpu
->usage
= le64_to_cpu(disk
->usage
);
2656 cpu
->devid
= le64_to_cpu(disk
->devid
);
2657 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2658 cpu
->pend
= le64_to_cpu(disk
->pend
);
2659 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2660 cpu
->vend
= le64_to_cpu(disk
->vend
);
2661 cpu
->target
= le64_to_cpu(disk
->target
);
2662 cpu
->flags
= le64_to_cpu(disk
->flags
);
2666 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2667 struct btrfs_balance_args
*cpu
)
2669 memset(disk
, 0, sizeof(*disk
));
2671 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2672 disk
->usage
= cpu_to_le64(cpu
->usage
);
2673 disk
->devid
= cpu_to_le64(cpu
->devid
);
2674 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2675 disk
->pend
= cpu_to_le64(cpu
->pend
);
2676 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2677 disk
->vend
= cpu_to_le64(cpu
->vend
);
2678 disk
->target
= cpu_to_le64(cpu
->target
);
2679 disk
->flags
= cpu_to_le64(cpu
->flags
);
2682 /* struct btrfs_super_block */
2683 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2684 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2685 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2687 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2688 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2689 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2690 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2691 struct btrfs_super_block
, chunk_root_generation
, 64);
2692 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2694 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2696 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2697 chunk_root_level
, 8);
2698 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2700 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2701 log_root_transid
, 64);
2702 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2704 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2706 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2708 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2710 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2712 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2714 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2716 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2717 root_dir_objectid
, 64);
2718 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2720 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2722 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2723 compat_ro_flags
, 64);
2724 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2725 incompat_flags
, 64);
2726 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2728 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2729 cache_generation
, 64);
2731 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2733 int t
= btrfs_super_csum_type(s
);
2734 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2735 return btrfs_csum_sizes
[t
];
2738 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2740 return offsetof(struct btrfs_leaf
, items
);
2743 /* struct btrfs_file_extent_item */
2744 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2746 static inline unsigned long
2747 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2749 unsigned long offset
= (unsigned long)e
;
2750 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2754 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2756 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2759 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2761 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2763 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2764 disk_num_bytes
, 64);
2765 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2767 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2769 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2771 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2773 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2775 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2776 other_encoding
, 16);
2778 /* this returns the number of file bytes represented by the inline item.
2779 * If an item is compressed, this is the uncompressed size
2781 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2782 struct btrfs_file_extent_item
*e
)
2784 return btrfs_file_extent_ram_bytes(eb
, e
);
2788 * this returns the number of bytes used by the item on disk, minus the
2789 * size of any extent headers. If a file is compressed on disk, this is
2790 * the compressed size
2792 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2793 struct btrfs_item
*e
)
2795 unsigned long offset
;
2796 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2797 return btrfs_item_size(eb
, e
) - offset
;
2800 /* btrfs_dev_stats_item */
2801 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2802 struct btrfs_dev_stats_item
*ptr
,
2807 read_extent_buffer(eb
, &val
,
2808 offsetof(struct btrfs_dev_stats_item
, values
) +
2809 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2814 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2815 struct btrfs_dev_stats_item
*ptr
,
2818 write_extent_buffer(eb
, &val
,
2819 offsetof(struct btrfs_dev_stats_item
, values
) +
2820 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2824 /* btrfs_qgroup_status_item */
2825 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2827 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2829 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2831 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2834 /* btrfs_qgroup_info_item */
2835 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2837 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2838 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2840 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2841 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2844 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2845 struct btrfs_qgroup_info_item
, generation
, 64);
2846 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2848 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2849 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2850 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2852 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2853 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2855 /* btrfs_qgroup_limit_item */
2856 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2858 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2860 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2862 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2864 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2867 /* btrfs_dev_replace_item */
2868 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2869 struct btrfs_dev_replace_item
, src_devid
, 64);
2870 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2871 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2873 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2875 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2877 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2879 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2880 num_write_errors
, 64);
2881 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2882 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2884 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2886 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2889 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2890 struct btrfs_dev_replace_item
, src_devid
, 64);
2891 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2892 struct btrfs_dev_replace_item
,
2893 cont_reading_from_srcdev_mode
, 64);
2894 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2895 struct btrfs_dev_replace_item
, replace_state
, 64);
2896 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2897 struct btrfs_dev_replace_item
, time_started
, 64);
2898 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2899 struct btrfs_dev_replace_item
, time_stopped
, 64);
2900 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2901 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2902 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2903 struct btrfs_dev_replace_item
,
2904 num_uncorrectable_read_errors
, 64);
2905 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2906 struct btrfs_dev_replace_item
, cursor_left
, 64);
2907 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2908 struct btrfs_dev_replace_item
, cursor_right
, 64);
2910 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2912 return sb
->s_fs_info
;
2915 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2918 return root
->leafsize
;
2919 return root
->nodesize
;
2922 /* helper function to cast into the data area of the leaf. */
2923 #define btrfs_item_ptr(leaf, slot, type) \
2924 ((type *)(btrfs_leaf_data(leaf) + \
2925 btrfs_item_offset_nr(leaf, slot)))
2927 #define btrfs_item_ptr_offset(leaf, slot) \
2928 ((unsigned long)(btrfs_leaf_data(leaf) + \
2929 btrfs_item_offset_nr(leaf, slot)))
2931 static inline struct dentry
*fdentry(struct file
*file
)
2933 return file
->f_path
.dentry
;
2936 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2938 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2939 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2942 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2944 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2948 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2951 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2956 * Doing a truncate won't result in new nodes or leaves, just what we need for
2959 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2962 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2966 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2967 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2968 struct btrfs_root
*root
, unsigned long count
);
2969 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2970 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2971 struct btrfs_root
*root
, u64 bytenr
,
2972 u64 num_bytes
, u64
*refs
, u64
*flags
);
2973 int btrfs_pin_extent(struct btrfs_root
*root
,
2974 u64 bytenr
, u64 num
, int reserved
);
2975 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2976 struct btrfs_root
*root
,
2977 u64 bytenr
, u64 num_bytes
);
2978 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2979 struct btrfs_root
*root
,
2980 u64 objectid
, u64 offset
, u64 bytenr
);
2981 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2982 struct btrfs_fs_info
*info
,
2984 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2985 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2986 u64 search_start
, u64 search_hint
, int owner
);
2987 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2988 struct btrfs_root
*root
, u32 blocksize
,
2989 u64 parent
, u64 root_objectid
,
2990 struct btrfs_disk_key
*key
, int level
,
2991 u64 hint
, u64 empty_size
);
2992 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2993 struct btrfs_root
*root
,
2994 struct extent_buffer
*buf
,
2995 u64 parent
, int last_ref
);
2996 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2997 struct btrfs_root
*root
,
2998 u64 bytenr
, u32 blocksize
,
3000 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3001 struct btrfs_root
*root
,
3002 u64 root_objectid
, u64 owner
,
3003 u64 offset
, struct btrfs_key
*ins
);
3004 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3005 struct btrfs_root
*root
,
3006 u64 root_objectid
, u64 owner
, u64 offset
,
3007 struct btrfs_key
*ins
);
3008 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
3009 struct btrfs_root
*root
,
3010 u64 num_bytes
, u64 min_alloc_size
,
3011 u64 empty_size
, u64 hint_byte
,
3012 struct btrfs_key
*ins
, u64 data
);
3013 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3014 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3015 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3016 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3017 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3018 struct btrfs_root
*root
,
3019 u64 bytenr
, u64 num_bytes
, u64 flags
,
3021 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3022 struct btrfs_root
*root
,
3023 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3024 u64 owner
, u64 offset
, int for_cow
);
3026 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3027 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3028 u64 start
, u64 len
);
3029 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3030 struct btrfs_root
*root
);
3031 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3032 struct btrfs_root
*root
);
3033 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3034 struct btrfs_root
*root
,
3035 u64 bytenr
, u64 num_bytes
, u64 parent
,
3036 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3038 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3039 struct btrfs_root
*root
);
3040 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3041 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3042 int btrfs_read_block_groups(struct btrfs_root
*root
);
3043 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3044 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3045 struct btrfs_root
*root
, u64 bytes_used
,
3046 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3048 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3049 struct btrfs_root
*root
, u64 group_start
);
3050 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3051 struct btrfs_root
*root
);
3052 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
3053 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3054 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3056 enum btrfs_reserve_flush_enum
{
3057 /* If we are in the transaction, we can't flush anything.*/
3058 BTRFS_RESERVE_NO_FLUSH
,
3060 * Flushing delalloc may cause deadlock somewhere, in this
3061 * case, use FLUSH LIMIT
3063 BTRFS_RESERVE_FLUSH_LIMIT
,
3064 BTRFS_RESERVE_FLUSH_ALL
,
3067 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3068 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3069 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3070 struct btrfs_root
*root
);
3071 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3072 struct inode
*inode
);
3073 void btrfs_orphan_release_metadata(struct inode
*inode
);
3074 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
3075 struct btrfs_pending_snapshot
*pending
);
3076 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3077 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3078 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3079 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3080 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3081 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3082 unsigned short type
);
3083 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3084 struct btrfs_block_rsv
*rsv
);
3085 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3086 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3087 enum btrfs_reserve_flush_enum flush
);
3088 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3089 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3090 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3091 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3092 enum btrfs_reserve_flush_enum flush
);
3093 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3094 struct btrfs_block_rsv
*dst_rsv
,
3096 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3097 struct btrfs_block_rsv
*block_rsv
,
3099 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3100 struct btrfs_block_group_cache
*cache
);
3101 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3102 struct btrfs_block_group_cache
*cache
);
3103 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3104 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3105 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3106 u64 start
, u64 end
);
3107 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3108 u64 num_bytes
, u64
*actual_bytes
);
3109 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3110 struct btrfs_root
*root
, u64 type
);
3111 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3113 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3114 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3115 struct btrfs_fs_info
*fs_info
);
3116 int __get_raid_index(u64 flags
);
3118 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3119 int level
, int *slot
);
3120 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3121 int btrfs_previous_item(struct btrfs_root
*root
,
3122 struct btrfs_path
*path
, u64 min_objectid
,
3124 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
3125 struct btrfs_root
*root
, struct btrfs_path
*path
,
3126 struct btrfs_key
*new_key
);
3127 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3128 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3129 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3130 struct btrfs_key
*key
, int lowest_level
,
3131 int cache_only
, u64 min_trans
);
3132 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3133 struct btrfs_key
*max_key
,
3134 struct btrfs_path
*path
, int cache_only
,
3136 enum btrfs_compare_tree_result
{
3137 BTRFS_COMPARE_TREE_NEW
,
3138 BTRFS_COMPARE_TREE_DELETED
,
3139 BTRFS_COMPARE_TREE_CHANGED
,
3141 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3142 struct btrfs_root
*right_root
,
3143 struct btrfs_path
*left_path
,
3144 struct btrfs_path
*right_path
,
3145 struct btrfs_key
*key
,
3146 enum btrfs_compare_tree_result result
,
3148 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3149 struct btrfs_root
*right_root
,
3150 btrfs_changed_cb_t cb
, void *ctx
);
3151 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3152 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3153 struct extent_buffer
*parent
, int parent_slot
,
3154 struct extent_buffer
**cow_ret
);
3155 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3156 struct btrfs_root
*root
,
3157 struct extent_buffer
*buf
,
3158 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3159 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3160 struct extent_buffer
*buf
);
3161 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
3162 struct btrfs_root
*root
, struct btrfs_path
*path
,
3164 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
3165 struct btrfs_root
*root
,
3166 struct btrfs_path
*path
,
3167 u32 new_size
, int from_end
);
3168 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3169 struct btrfs_root
*root
,
3170 struct btrfs_path
*path
,
3171 struct btrfs_key
*new_key
,
3172 unsigned long split_offset
);
3173 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3174 struct btrfs_root
*root
,
3175 struct btrfs_path
*path
,
3176 struct btrfs_key
*new_key
);
3177 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3178 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3180 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3181 struct btrfs_path
*p
, u64 time_seq
);
3182 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3183 struct btrfs_key
*key
, struct btrfs_path
*p
,
3184 int find_higher
, int return_any
);
3185 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3186 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3187 int start_slot
, int cache_only
, u64
*last_ret
,
3188 struct btrfs_key
*progress
);
3189 void btrfs_release_path(struct btrfs_path
*p
);
3190 struct btrfs_path
*btrfs_alloc_path(void);
3191 void btrfs_free_path(struct btrfs_path
*p
);
3192 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3193 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3194 struct extent_buffer
*held
, int held_rw
);
3195 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3197 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3198 struct btrfs_path
*path
, int slot
, int nr
);
3199 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3200 struct btrfs_root
*root
,
3201 struct btrfs_path
*path
)
3203 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3206 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
3207 struct btrfs_root
*root
, struct btrfs_path
*path
,
3208 struct btrfs_key
*cpu_key
, u32
*data_size
,
3209 u32 total_data
, u32 total_size
, int nr
);
3210 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3211 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3212 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3213 struct btrfs_root
*root
,
3214 struct btrfs_path
*path
,
3215 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3217 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3218 struct btrfs_root
*root
,
3219 struct btrfs_path
*path
,
3220 struct btrfs_key
*key
,
3223 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3226 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3227 int btrfs_next_leaf_write(struct btrfs_trans_handle
*trans
,
3228 struct btrfs_root
*root
, struct btrfs_path
*path
,
3230 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3232 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3233 struct btrfs_path
*p
, u64 time_seq
)
3236 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3237 return btrfs_next_old_leaf(root
, p
, time_seq
);
3240 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3242 return btrfs_next_old_item(root
, p
, 0);
3244 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3245 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3246 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3247 struct btrfs_block_rsv
*block_rsv
,
3248 int update_ref
, int for_reloc
);
3249 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3250 struct btrfs_root
*root
,
3251 struct extent_buffer
*node
,
3252 struct extent_buffer
*parent
);
3253 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3256 * Get synced with close_ctree()
3259 return fs_info
->closing
;
3261 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3263 kfree(fs_info
->balance_ctl
);
3264 kfree(fs_info
->delayed_root
);
3265 kfree(fs_info
->extent_root
);
3266 kfree(fs_info
->tree_root
);
3267 kfree(fs_info
->chunk_root
);
3268 kfree(fs_info
->dev_root
);
3269 kfree(fs_info
->csum_root
);
3270 kfree(fs_info
->quota_root
);
3271 kfree(fs_info
->super_copy
);
3272 kfree(fs_info
->super_for_commit
);
3276 /* tree mod log functions from ctree.c */
3277 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3278 struct seq_list
*elem
);
3279 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3280 struct seq_list
*elem
);
3281 static inline u64
btrfs_inc_tree_mod_seq(struct btrfs_fs_info
*fs_info
)
3283 return atomic_inc_return(&fs_info
->tree_mod_seq
);
3285 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3288 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3289 struct btrfs_path
*path
,
3290 u64 root_id
, u64 ref_id
);
3291 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3292 struct btrfs_root
*tree_root
,
3293 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3294 const char *name
, int name_len
);
3295 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3296 struct btrfs_root
*tree_root
,
3297 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3298 const char *name
, int name_len
);
3299 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3300 struct btrfs_key
*key
);
3301 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3302 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3304 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3305 struct btrfs_root
*root
,
3306 struct btrfs_key
*key
,
3307 struct btrfs_root_item
*item
);
3308 void btrfs_read_root_item(struct btrfs_root
*root
,
3309 struct extent_buffer
*eb
, int slot
,
3310 struct btrfs_root_item
*item
);
3311 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
3312 btrfs_root_item
*item
, struct btrfs_key
*key
);
3313 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
3314 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3315 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3316 struct extent_buffer
*node
);
3317 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3318 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3319 struct btrfs_root
*root
);
3322 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3323 const char *name
, int name_len
);
3324 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3325 struct btrfs_root
*root
, const char *name
,
3326 int name_len
, struct inode
*dir
,
3327 struct btrfs_key
*location
, u8 type
, u64 index
);
3328 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3329 struct btrfs_root
*root
,
3330 struct btrfs_path
*path
, u64 dir
,
3331 const char *name
, int name_len
,
3333 struct btrfs_dir_item
*
3334 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3335 struct btrfs_root
*root
,
3336 struct btrfs_path
*path
, u64 dir
,
3337 u64 objectid
, const char *name
, int name_len
,
3339 struct btrfs_dir_item
*
3340 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3341 struct btrfs_path
*path
, u64 dirid
,
3342 const char *name
, int name_len
);
3343 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3344 struct btrfs_path
*path
,
3345 const char *name
, int name_len
);
3346 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3347 struct btrfs_root
*root
,
3348 struct btrfs_path
*path
,
3349 struct btrfs_dir_item
*di
);
3350 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3351 struct btrfs_root
*root
,
3352 struct btrfs_path
*path
, u64 objectid
,
3353 const char *name
, u16 name_len
,
3354 const void *data
, u16 data_len
);
3355 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3356 struct btrfs_root
*root
,
3357 struct btrfs_path
*path
, u64 dir
,
3358 const char *name
, u16 name_len
,
3360 int verify_dir_item(struct btrfs_root
*root
,
3361 struct extent_buffer
*leaf
,
3362 struct btrfs_dir_item
*dir_item
);
3365 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3366 struct btrfs_root
*root
, u64 offset
);
3367 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3368 struct btrfs_root
*root
, u64 offset
);
3369 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3372 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3373 struct btrfs_root
*root
,
3374 const char *name
, int name_len
,
3375 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3376 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3377 struct btrfs_root
*root
,
3378 const char *name
, int name_len
,
3379 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3380 int btrfs_get_inode_ref_index(struct btrfs_trans_handle
*trans
,
3381 struct btrfs_root
*root
,
3382 struct btrfs_path
*path
,
3383 const char *name
, int name_len
,
3384 u64 inode_objectid
, u64 ref_objectid
, int mod
,
3386 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3387 struct btrfs_root
*root
,
3388 struct btrfs_path
*path
, u64 objectid
);
3389 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3390 *root
, struct btrfs_path
*path
,
3391 struct btrfs_key
*location
, int mod
);
3393 struct btrfs_inode_extref
*
3394 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3395 struct btrfs_root
*root
,
3396 struct btrfs_path
*path
,
3397 const char *name
, int name_len
,
3398 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3401 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3402 u64 ref_objectid
, const char *name
,
3404 struct btrfs_inode_extref
**extref_ret
);
3407 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3408 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3409 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3410 struct bio
*bio
, u32
*dst
);
3411 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3412 struct bio
*bio
, u64 logical_offset
);
3413 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3414 struct btrfs_root
*root
,
3415 u64 objectid
, u64 pos
,
3416 u64 disk_offset
, u64 disk_num_bytes
,
3417 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3418 u8 compression
, u8 encryption
, u16 other_encoding
);
3419 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3420 struct btrfs_root
*root
,
3421 struct btrfs_path
*path
, u64 objectid
,
3422 u64 bytenr
, int mod
);
3423 u64
btrfs_file_extent_length(struct btrfs_path
*path
);
3424 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3425 struct btrfs_root
*root
,
3426 struct btrfs_ordered_sum
*sums
);
3427 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3428 struct bio
*bio
, u64 file_start
, int contig
);
3429 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
3430 struct btrfs_root
*root
,
3431 struct btrfs_path
*path
,
3432 u64 bytenr
, int cow
);
3433 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
3434 struct btrfs_root
*root
, struct btrfs_path
*path
,
3436 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3437 struct list_head
*list
, int search_commit
);
3439 struct btrfs_delalloc_work
{
3440 struct inode
*inode
;
3443 struct completion completion
;
3444 struct list_head list
;
3445 struct btrfs_work work
;
3448 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3449 int wait
, int delay_iput
);
3450 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3452 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3453 size_t pg_offset
, u64 start
, u64 len
,
3456 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3457 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3458 #define ClearPageChecked ClearPageFsMisc
3459 #define SetPageChecked SetPageFsMisc
3460 #define PageChecked PageFsMisc
3463 /* This forces readahead on a given range of bytes in an inode */
3464 static inline void btrfs_force_ra(struct address_space
*mapping
,
3465 struct file_ra_state
*ra
, struct file
*file
,
3466 pgoff_t offset
, unsigned long req_size
)
3468 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3471 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3472 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3473 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3474 struct btrfs_root
*root
,
3475 struct inode
*dir
, struct inode
*inode
,
3476 const char *name
, int name_len
);
3477 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3478 struct inode
*parent_inode
, struct inode
*inode
,
3479 const char *name
, int name_len
, int add_backref
, u64 index
);
3480 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3481 struct btrfs_root
*root
,
3482 struct inode
*dir
, u64 objectid
,
3483 const char *name
, int name_len
);
3484 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3486 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3487 struct btrfs_root
*root
,
3488 struct inode
*inode
, u64 new_size
,
3491 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3492 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3493 struct extent_state
**cached_state
);
3494 int btrfs_writepages(struct address_space
*mapping
,
3495 struct writeback_control
*wbc
);
3496 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3497 struct btrfs_root
*new_root
, u64 new_dirid
);
3498 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3499 size_t size
, struct bio
*bio
,
3500 unsigned long bio_flags
);
3501 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3502 int btrfs_readpage(struct file
*file
, struct page
*page
);
3503 void btrfs_evict_inode(struct inode
*inode
);
3504 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3505 int btrfs_dirty_inode(struct inode
*inode
);
3506 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3507 void btrfs_destroy_inode(struct inode
*inode
);
3508 int btrfs_drop_inode(struct inode
*inode
);
3509 int btrfs_init_cachep(void);
3510 void btrfs_destroy_cachep(void);
3511 long btrfs_ioctl_trans_end(struct file
*file
);
3512 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3513 struct btrfs_root
*root
, int *was_new
);
3514 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3515 size_t pg_offset
, u64 start
, u64 end
,
3517 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3518 struct btrfs_root
*root
,
3519 struct inode
*inode
);
3520 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3521 struct btrfs_root
*root
, struct inode
*inode
);
3522 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3523 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3524 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3525 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3526 struct btrfs_root
*root
);
3527 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3528 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3529 void btrfs_add_delayed_iput(struct inode
*inode
);
3530 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3531 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3532 u64 start
, u64 num_bytes
, u64 min_size
,
3533 loff_t actual_len
, u64
*alloc_hint
);
3534 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3535 struct btrfs_trans_handle
*trans
, int mode
,
3536 u64 start
, u64 num_bytes
, u64 min_size
,
3537 loff_t actual_len
, u64
*alloc_hint
);
3538 extern const struct dentry_operations btrfs_dentry_operations
;
3541 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3542 void btrfs_update_iflags(struct inode
*inode
);
3543 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3544 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3545 struct btrfs_ioctl_defrag_range_args
*range
,
3546 u64 newer_than
, unsigned long max_pages
);
3547 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3548 struct btrfs_ioctl_space_info
*space
);
3551 int btrfs_auto_defrag_init(void);
3552 void btrfs_auto_defrag_exit(void);
3553 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3554 struct inode
*inode
);
3555 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3556 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3557 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3558 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3560 int btrfs_replace_extent_cache(struct inode
*inode
, struct extent_map
*replace
,
3561 u64 start
, u64 end
, int skip_pinned
,
3563 extern const struct file_operations btrfs_file_operations
;
3564 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3565 struct btrfs_root
*root
, struct inode
*inode
,
3566 struct btrfs_path
*path
, u64 start
, u64 end
,
3567 u64
*drop_end
, int drop_cache
);
3568 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3569 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3570 u64 end
, int drop_cache
);
3571 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3572 struct inode
*inode
, u64 start
, u64 end
);
3573 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3574 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
3575 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3576 struct page
**pages
, size_t num_pages
,
3577 loff_t pos
, size_t write_bytes
,
3578 struct extent_state
**cached
);
3581 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3582 struct btrfs_root
*root
, int cache_only
);
3585 int btrfs_init_sysfs(void);
3586 void btrfs_exit_sysfs(void);
3589 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3592 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3593 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3595 #ifdef CONFIG_PRINTK
3597 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3599 static inline __printf(2, 3)
3600 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3606 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3607 unsigned int line
, int errno
, const char *fmt
, ...);
3610 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3611 struct btrfs_root
*root
, const char *function
,
3612 unsigned int line
, int errno
);
3614 #define btrfs_set_fs_incompat(__fs_info, opt) \
3615 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3617 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3620 struct btrfs_super_block
*disk_super
;
3623 disk_super
= fs_info
->super_copy
;
3624 features
= btrfs_super_incompat_flags(disk_super
);
3625 if (!(features
& flag
)) {
3627 btrfs_set_super_incompat_flags(disk_super
, features
);
3632 * Call btrfs_abort_transaction as early as possible when an error condition is
3633 * detected, that way the exact line number is reported.
3636 #define btrfs_abort_transaction(trans, root, errno) \
3638 __btrfs_abort_transaction(trans, root, __func__, \
3642 #define btrfs_std_error(fs_info, errno) \
3645 __btrfs_std_error((fs_info), __func__, \
3646 __LINE__, (errno), NULL); \
3649 #define btrfs_error(fs_info, errno, fmt, args...) \
3651 __btrfs_std_error((fs_info), __func__, __LINE__, \
3652 (errno), fmt, ##args); \
3656 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3657 unsigned int line
, int errno
, const char *fmt
, ...);
3659 #define btrfs_panic(fs_info, errno, fmt, args...) \
3661 struct btrfs_fs_info *_i = (fs_info); \
3662 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3663 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
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
)