2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 2
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for 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)
506 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
507 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
508 #define BTRFS_FEATURE_INCOMPAT_SUPP \
509 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
510 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
511 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
512 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
513 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
514 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
517 * A leaf is full of items. offset and size tell us where to find
518 * the item in the leaf (relative to the start of the data area)
521 struct btrfs_disk_key key
;
524 } __attribute__ ((__packed__
));
527 * leaves have an item area and a data area:
528 * [item0, item1....itemN] [free space] [dataN...data1, data0]
530 * The data is separate from the items to get the keys closer together
534 struct btrfs_header header
;
535 struct btrfs_item items
[];
536 } __attribute__ ((__packed__
));
539 * all non-leaf blocks are nodes, they hold only keys and pointers to
542 struct btrfs_key_ptr
{
543 struct btrfs_disk_key key
;
546 } __attribute__ ((__packed__
));
549 struct btrfs_header header
;
550 struct btrfs_key_ptr ptrs
[];
551 } __attribute__ ((__packed__
));
554 * btrfs_paths remember the path taken from the root down to the leaf.
555 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
556 * to any other levels that are present.
558 * The slots array records the index of the item or block pointer
559 * used while walking the tree.
562 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
563 int slots
[BTRFS_MAX_LEVEL
];
564 /* if there is real range locking, this locks field will change */
565 int locks
[BTRFS_MAX_LEVEL
];
567 /* keep some upper locks as we walk down */
571 * set by btrfs_split_item, tells search_slot to keep all locks
572 * and to force calls to keep space in the nodes
574 unsigned int search_for_split
:1;
575 unsigned int keep_locks
:1;
576 unsigned int skip_locking
:1;
577 unsigned int leave_spinning
:1;
578 unsigned int search_commit_root
:1;
582 * items in the extent btree are used to record the objectid of the
583 * owner of the block and the number of references
586 struct btrfs_extent_item
{
590 } __attribute__ ((__packed__
));
592 struct btrfs_extent_item_v0
{
594 } __attribute__ ((__packed__
));
596 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
597 sizeof(struct btrfs_item))
599 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
600 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
602 /* following flags only apply to tree blocks */
604 /* use full backrefs for extent pointers in the block */
605 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
608 * this flag is only used internally by scrub and may be changed at any time
609 * it is only declared here to avoid collisions
611 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
613 struct btrfs_tree_block_info
{
614 struct btrfs_disk_key key
;
616 } __attribute__ ((__packed__
));
618 struct btrfs_extent_data_ref
{
623 } __attribute__ ((__packed__
));
625 struct btrfs_shared_data_ref
{
627 } __attribute__ ((__packed__
));
629 struct btrfs_extent_inline_ref
{
632 } __attribute__ ((__packed__
));
634 /* old style backrefs item */
635 struct btrfs_extent_ref_v0
{
640 } __attribute__ ((__packed__
));
643 /* dev extents record free space on individual devices. The owner
644 * field points back to the chunk allocation mapping tree that allocated
645 * the extent. The chunk tree uuid field is a way to double check the owner
647 struct btrfs_dev_extent
{
649 __le64 chunk_objectid
;
652 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
653 } __attribute__ ((__packed__
));
655 struct btrfs_inode_ref
{
659 } __attribute__ ((__packed__
));
661 struct btrfs_inode_extref
{
662 __le64 parent_objectid
;
667 } __attribute__ ((__packed__
));
669 struct btrfs_timespec
{
672 } __attribute__ ((__packed__
));
674 enum btrfs_compression_type
{
675 BTRFS_COMPRESS_NONE
= 0,
676 BTRFS_COMPRESS_ZLIB
= 1,
677 BTRFS_COMPRESS_LZO
= 2,
678 BTRFS_COMPRESS_TYPES
= 2,
679 BTRFS_COMPRESS_LAST
= 3,
682 struct btrfs_inode_item
{
683 /* nfs style generation number */
685 /* transid that last touched this inode */
697 /* modification sequence number for NFS */
701 * a little future expansion, for more than this we can
702 * just grow the inode item and version it
705 struct btrfs_timespec atime
;
706 struct btrfs_timespec ctime
;
707 struct btrfs_timespec mtime
;
708 struct btrfs_timespec otime
;
709 } __attribute__ ((__packed__
));
711 struct btrfs_dir_log_item
{
713 } __attribute__ ((__packed__
));
715 struct btrfs_dir_item
{
716 struct btrfs_disk_key location
;
721 } __attribute__ ((__packed__
));
723 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
725 struct btrfs_root_item
{
726 struct btrfs_inode_item inode
;
732 __le64 last_snapshot
;
735 struct btrfs_disk_key drop_progress
;
740 * The following fields appear after subvol_uuids+subvol_times
745 * This generation number is used to test if the new fields are valid
746 * and up to date while reading the root item. Everytime the root item
747 * is written out, the "generation" field is copied into this field. If
748 * anyone ever mounted the fs with an older kernel, we will have
749 * mismatching generation values here and thus must invalidate the
750 * new fields. See btrfs_update_root and btrfs_find_last_root for
752 * the offset of generation_v2 is also used as the start for the memset
753 * when invalidating the fields.
755 __le64 generation_v2
;
756 u8 uuid
[BTRFS_UUID_SIZE
];
757 u8 parent_uuid
[BTRFS_UUID_SIZE
];
758 u8 received_uuid
[BTRFS_UUID_SIZE
];
759 __le64 ctransid
; /* updated when an inode changes */
760 __le64 otransid
; /* trans when created */
761 __le64 stransid
; /* trans when sent. non-zero for received subvol */
762 __le64 rtransid
; /* trans when received. non-zero for received subvol */
763 struct btrfs_timespec ctime
;
764 struct btrfs_timespec otime
;
765 struct btrfs_timespec stime
;
766 struct btrfs_timespec rtime
;
767 __le64 reserved
[8]; /* for future */
768 } __attribute__ ((__packed__
));
771 * this is used for both forward and backward root refs
773 struct btrfs_root_ref
{
777 } __attribute__ ((__packed__
));
779 struct btrfs_disk_balance_args
{
781 * profiles to operate on, single is denoted by
782 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
792 /* devid subset filter [pstart..pend) */
796 /* btrfs virtual address space subset filter [vstart..vend) */
801 * profile to convert to, single is denoted by
802 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
806 /* BTRFS_BALANCE_ARGS_* */
810 } __attribute__ ((__packed__
));
813 * store balance parameters to disk so that balance can be properly
814 * resumed after crash or unmount
816 struct btrfs_balance_item
{
817 /* BTRFS_BALANCE_* */
820 struct btrfs_disk_balance_args data
;
821 struct btrfs_disk_balance_args meta
;
822 struct btrfs_disk_balance_args sys
;
825 } __attribute__ ((__packed__
));
827 #define BTRFS_FILE_EXTENT_INLINE 0
828 #define BTRFS_FILE_EXTENT_REG 1
829 #define BTRFS_FILE_EXTENT_PREALLOC 2
831 struct btrfs_file_extent_item
{
833 * transaction id that created this extent
837 * max number of bytes to hold this extent in ram
838 * when we split a compressed extent we can't know how big
839 * each of the resulting pieces will be. So, this is
840 * an upper limit on the size of the extent in ram instead of
846 * 32 bits for the various ways we might encode the data,
847 * including compression and encryption. If any of these
848 * are set to something a given disk format doesn't understand
849 * it is treated like an incompat flag for reading and writing,
854 __le16 other_encoding
; /* spare for later use */
856 /* are we inline data or a real extent? */
860 * disk space consumed by the extent, checksum blocks are included
864 __le64 disk_num_bytes
;
866 * the logical offset in file blocks (no csums)
867 * this extent record is for. This allows a file extent to point
868 * into the middle of an existing extent on disk, sharing it
869 * between two snapshots (useful if some bytes in the middle of the
870 * extent have changed
874 * the logical number of file blocks (no csums included). This
875 * always reflects the size uncompressed and without encoding.
879 } __attribute__ ((__packed__
));
881 struct btrfs_csum_item
{
883 } __attribute__ ((__packed__
));
885 struct btrfs_dev_stats_item
{
887 * grow this item struct at the end for future enhancements and keep
888 * the existing values unchanged
890 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
891 } __attribute__ ((__packed__
));
893 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
894 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
895 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
896 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
897 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
898 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
899 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
901 struct btrfs_dev_replace
{
902 u64 replace_state
; /* see #define above */
903 u64 time_started
; /* seconds since 1-Jan-1970 */
904 u64 time_stopped
; /* seconds since 1-Jan-1970 */
905 atomic64_t num_write_errors
;
906 atomic64_t num_uncorrectable_read_errors
;
909 u64 committed_cursor_left
;
910 u64 cursor_left_last_write_of_item
;
913 u64 cont_reading_from_srcdev_mode
; /* see #define above */
916 int item_needs_writeback
;
917 struct btrfs_device
*srcdev
;
918 struct btrfs_device
*tgtdev
;
921 atomic_t nesting_level
;
922 struct mutex lock_finishing_cancel_unmount
;
923 struct mutex lock_management_lock
;
926 struct btrfs_scrub_progress scrub_progress
;
929 struct btrfs_dev_replace_item
{
931 * grow this item struct at the end for future enhancements and keep
932 * the existing values unchanged
937 __le64 cont_reading_from_srcdev_mode
;
939 __le64 replace_state
;
942 __le64 num_write_errors
;
943 __le64 num_uncorrectable_read_errors
;
944 } __attribute__ ((__packed__
));
946 /* different types of block groups (and chunks) */
947 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
948 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
949 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
950 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
951 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
952 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
953 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
954 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
955 #define BTRFS_NR_RAID_TYPES 5
957 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
958 BTRFS_BLOCK_GROUP_SYSTEM | \
959 BTRFS_BLOCK_GROUP_METADATA)
961 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
962 BTRFS_BLOCK_GROUP_RAID1 | \
963 BTRFS_BLOCK_GROUP_DUP | \
964 BTRFS_BLOCK_GROUP_RAID10)
966 * We need a bit for restriper to be able to tell when chunks of type
967 * SINGLE are available. This "extended" profile format is used in
968 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
969 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
970 * to avoid remappings between two formats in future.
972 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
974 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
975 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
977 static inline u64
chunk_to_extended(u64 flags
)
979 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
980 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
984 static inline u64
extended_to_chunk(u64 flags
)
986 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
989 struct btrfs_block_group_item
{
991 __le64 chunk_objectid
;
993 } __attribute__ ((__packed__
));
996 * is subvolume quota turned on?
998 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1000 * SCANNING is set during the initialization phase
1002 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1004 * Some qgroup entries are known to be out of date,
1005 * either because the configuration has changed in a way that
1006 * makes a rescan necessary, or because the fs has been mounted
1007 * with a non-qgroup-aware version.
1008 * Turning qouta off and on again makes it inconsistent, too.
1010 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1012 #define BTRFS_QGROUP_STATUS_VERSION 1
1014 struct btrfs_qgroup_status_item
{
1017 * the generation is updated during every commit. As older
1018 * versions of btrfs are not aware of qgroups, it will be
1019 * possible to detect inconsistencies by checking the
1020 * generation on mount time
1024 /* flag definitions see above */
1028 * only used during scanning to record the progress
1029 * of the scan. It contains a logical address
1032 } __attribute__ ((__packed__
));
1034 struct btrfs_qgroup_info_item
{
1040 } __attribute__ ((__packed__
));
1042 /* flags definition for qgroup limits */
1043 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1044 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1045 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1046 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1047 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1048 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1050 struct btrfs_qgroup_limit_item
{
1052 * only updated when any of the other values change
1059 } __attribute__ ((__packed__
));
1061 struct btrfs_space_info
{
1064 u64 total_bytes
; /* total bytes in the space,
1065 this doesn't take mirrors into account */
1066 u64 bytes_used
; /* total bytes used,
1067 this doesn't take mirrors into account */
1068 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1069 transaction finishes */
1070 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1071 current allocations */
1072 u64 bytes_readonly
; /* total bytes that are read only */
1074 u64 bytes_may_use
; /* number of bytes that may be used for
1075 delalloc/allocations */
1076 u64 disk_used
; /* total bytes used on disk */
1077 u64 disk_total
; /* total bytes on disk, takes mirrors into
1081 * we bump reservation progress every time we decrement
1082 * bytes_reserved. This way people waiting for reservations
1083 * know something good has happened and they can check
1084 * for progress. The number here isn't to be trusted, it
1085 * just shows reclaim activity
1087 unsigned long reservation_progress
;
1089 unsigned int full
:1; /* indicates that we cannot allocate any more
1090 chunks for this space */
1091 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1093 unsigned int flush
:1; /* set if we are trying to make space */
1095 unsigned int force_alloc
; /* set if we need to force a chunk
1096 alloc for this space */
1098 struct list_head list
;
1100 /* for block groups in our same type */
1101 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1103 struct rw_semaphore groups_sem
;
1104 wait_queue_head_t wait
;
1107 #define BTRFS_BLOCK_RSV_GLOBAL 1
1108 #define BTRFS_BLOCK_RSV_DELALLOC 2
1109 #define BTRFS_BLOCK_RSV_TRANS 3
1110 #define BTRFS_BLOCK_RSV_CHUNK 4
1111 #define BTRFS_BLOCK_RSV_DELOPS 5
1112 #define BTRFS_BLOCK_RSV_EMPTY 6
1113 #define BTRFS_BLOCK_RSV_TEMP 7
1115 struct btrfs_block_rsv
{
1118 struct btrfs_space_info
*space_info
;
1120 unsigned short full
;
1121 unsigned short type
;
1122 unsigned short failfast
;
1126 * free clusters are used to claim free space in relatively large chunks,
1127 * allowing us to do less seeky writes. They are used for all metadata
1128 * allocations and data allocations in ssd mode.
1130 struct btrfs_free_cluster
{
1132 spinlock_t refill_lock
;
1133 struct rb_root root
;
1135 /* largest extent in this cluster */
1138 /* first extent starting offset */
1141 struct btrfs_block_group_cache
*block_group
;
1143 * when a cluster is allocated from a block group, we put the
1144 * cluster onto a list in the block group so that it can
1145 * be freed before the block group is freed.
1147 struct list_head block_group_list
;
1150 enum btrfs_caching_type
{
1152 BTRFS_CACHE_STARTED
= 1,
1153 BTRFS_CACHE_FAST
= 2,
1154 BTRFS_CACHE_FINISHED
= 3,
1157 enum btrfs_disk_cache_state
{
1158 BTRFS_DC_WRITTEN
= 0,
1162 BTRFS_DC_NEED_WRITE
= 4,
1165 struct btrfs_caching_control
{
1166 struct list_head list
;
1168 wait_queue_head_t wait
;
1169 struct btrfs_work work
;
1170 struct btrfs_block_group_cache
*block_group
;
1175 struct btrfs_block_group_cache
{
1176 struct btrfs_key key
;
1177 struct btrfs_block_group_item item
;
1178 struct btrfs_fs_info
*fs_info
;
1179 struct inode
*inode
;
1186 u64 cache_generation
;
1188 unsigned int dirty
:1;
1189 unsigned int iref
:1;
1191 int disk_cache_state
;
1193 /* cache tracking stuff */
1195 struct btrfs_caching_control
*caching_ctl
;
1196 u64 last_byte_to_unpin
;
1198 struct btrfs_space_info
*space_info
;
1200 /* free space cache stuff */
1201 struct btrfs_free_space_ctl
*free_space_ctl
;
1203 /* block group cache stuff */
1204 struct rb_node cache_node
;
1206 /* for block groups in the same raid type */
1207 struct list_head list
;
1212 /* List of struct btrfs_free_clusters for this block group.
1213 * Today it will only have one thing on it, but that may change
1215 struct list_head cluster_list
;
1217 /* For delayed block group creation */
1218 struct list_head new_bg_list
;
1221 /* delayed seq elem */
1223 struct list_head list
;
1228 struct reloc_control
;
1229 struct btrfs_device
;
1230 struct btrfs_fs_devices
;
1231 struct btrfs_balance_control
;
1232 struct btrfs_delayed_root
;
1233 struct btrfs_fs_info
{
1234 u8 fsid
[BTRFS_FSID_SIZE
];
1235 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1236 struct btrfs_root
*extent_root
;
1237 struct btrfs_root
*tree_root
;
1238 struct btrfs_root
*chunk_root
;
1239 struct btrfs_root
*dev_root
;
1240 struct btrfs_root
*fs_root
;
1241 struct btrfs_root
*csum_root
;
1242 struct btrfs_root
*quota_root
;
1244 /* the log root tree is a directory of all the other log roots */
1245 struct btrfs_root
*log_root_tree
;
1247 spinlock_t fs_roots_radix_lock
;
1248 struct radix_tree_root fs_roots_radix
;
1250 /* block group cache stuff */
1251 spinlock_t block_group_cache_lock
;
1252 struct rb_root block_group_cache_tree
;
1254 /* keep track of unallocated space */
1255 spinlock_t free_chunk_lock
;
1256 u64 free_chunk_space
;
1258 struct extent_io_tree freed_extents
[2];
1259 struct extent_io_tree
*pinned_extents
;
1261 /* logical->physical extent mapping */
1262 struct btrfs_mapping_tree mapping_tree
;
1265 * block reservation for extent, checksum, root tree and
1266 * delayed dir index item
1268 struct btrfs_block_rsv global_block_rsv
;
1269 /* block reservation for delay allocation */
1270 struct btrfs_block_rsv delalloc_block_rsv
;
1271 /* block reservation for metadata operations */
1272 struct btrfs_block_rsv trans_block_rsv
;
1273 /* block reservation for chunk tree */
1274 struct btrfs_block_rsv chunk_block_rsv
;
1275 /* block reservation for delayed operations */
1276 struct btrfs_block_rsv delayed_block_rsv
;
1278 struct btrfs_block_rsv empty_block_rsv
;
1281 u64 last_trans_committed
;
1284 * this is updated to the current trans every time a full commit
1285 * is required instead of the faster short fsync log commits
1287 u64 last_trans_log_full_commit
;
1288 unsigned long mount_opt
;
1289 unsigned long compress_type
:4;
1292 struct btrfs_transaction
*running_transaction
;
1293 wait_queue_head_t transaction_throttle
;
1294 wait_queue_head_t transaction_wait
;
1295 wait_queue_head_t transaction_blocked_wait
;
1296 wait_queue_head_t async_submit_wait
;
1298 struct btrfs_super_block
*super_copy
;
1299 struct btrfs_super_block
*super_for_commit
;
1300 struct block_device
*__bdev
;
1301 struct super_block
*sb
;
1302 struct inode
*btree_inode
;
1303 struct backing_dev_info bdi
;
1304 struct mutex tree_log_mutex
;
1305 struct mutex transaction_kthread_mutex
;
1306 struct mutex cleaner_mutex
;
1307 struct mutex chunk_mutex
;
1308 struct mutex volume_mutex
;
1310 * this protects the ordered operations list only while we are
1311 * processing all of the entries on it. This way we make
1312 * sure the commit code doesn't find the list temporarily empty
1313 * because another function happens to be doing non-waiting preflush
1314 * before jumping into the main commit.
1316 struct mutex ordered_operations_mutex
;
1317 struct rw_semaphore extent_commit_sem
;
1319 struct rw_semaphore cleanup_work_sem
;
1321 struct rw_semaphore subvol_sem
;
1322 struct srcu_struct subvol_srcu
;
1324 spinlock_t trans_lock
;
1326 * the reloc mutex goes with the trans lock, it is taken
1327 * during commit to protect us from the relocation code
1329 struct mutex reloc_mutex
;
1331 struct list_head trans_list
;
1332 struct list_head dead_roots
;
1333 struct list_head caching_block_groups
;
1335 spinlock_t delayed_iput_lock
;
1336 struct list_head delayed_iputs
;
1338 /* this protects tree_mod_seq_list */
1339 spinlock_t tree_mod_seq_lock
;
1340 atomic_t tree_mod_seq
;
1341 struct list_head tree_mod_seq_list
;
1342 struct seq_list tree_mod_seq_elem
;
1344 /* this protects tree_mod_log */
1345 rwlock_t tree_mod_log_lock
;
1346 struct rb_root tree_mod_log
;
1348 atomic_t nr_async_submits
;
1349 atomic_t async_submit_draining
;
1350 atomic_t nr_async_bios
;
1351 atomic_t async_delalloc_pages
;
1352 atomic_t open_ioctl_trans
;
1355 * this is used by the balancing code to wait for all the pending
1358 spinlock_t ordered_extent_lock
;
1361 * all of the data=ordered extents pending writeback
1362 * these can span multiple transactions and basically include
1363 * every dirty data page that isn't from nodatacow
1365 struct list_head ordered_extents
;
1368 * all of the inodes that have delalloc bytes. It is possible for
1369 * this list to be empty even when there is still dirty data=ordered
1370 * extents waiting to finish IO.
1372 struct list_head delalloc_inodes
;
1375 * special rename and truncate targets that must be on disk before
1376 * we're allowed to commit. This is basically the ext3 style
1377 * data=ordered list.
1379 struct list_head ordered_operations
;
1382 * there is a pool of worker threads for checksumming during writes
1383 * and a pool for checksumming after reads. This is because readers
1384 * can run with FS locks held, and the writers may be waiting for
1385 * those locks. We don't want ordering in the pending list to cause
1386 * deadlocks, and so the two are serviced separately.
1388 * A third pool does submit_bio to avoid deadlocking with the other
1391 struct btrfs_workers generic_worker
;
1392 struct btrfs_workers workers
;
1393 struct btrfs_workers delalloc_workers
;
1394 struct btrfs_workers flush_workers
;
1395 struct btrfs_workers endio_workers
;
1396 struct btrfs_workers endio_meta_workers
;
1397 struct btrfs_workers endio_meta_write_workers
;
1398 struct btrfs_workers endio_write_workers
;
1399 struct btrfs_workers endio_freespace_worker
;
1400 struct btrfs_workers submit_workers
;
1401 struct btrfs_workers caching_workers
;
1402 struct btrfs_workers readahead_workers
;
1405 * fixup workers take dirty pages that didn't properly go through
1406 * the cow mechanism and make them safe to write. It happens
1407 * for the sys_munmap function call path
1409 struct btrfs_workers fixup_workers
;
1410 struct btrfs_workers delayed_workers
;
1411 struct task_struct
*transaction_kthread
;
1412 struct task_struct
*cleaner_kthread
;
1413 int thread_pool_size
;
1415 struct kobject super_kobj
;
1416 struct completion kobj_unregister
;
1419 int log_root_recovering
;
1425 /* protected by the delalloc lock, used to keep from writing
1426 * metadata until there is a nice batch
1428 u64 dirty_metadata_bytes
;
1429 struct list_head dirty_cowonly_roots
;
1431 struct btrfs_fs_devices
*fs_devices
;
1434 * the space_info list is almost entirely read only. It only changes
1435 * when we add a new raid type to the FS, and that happens
1436 * very rarely. RCU is used to protect it.
1438 struct list_head space_info
;
1440 struct btrfs_space_info
*data_sinfo
;
1442 struct reloc_control
*reloc_ctl
;
1444 spinlock_t delalloc_lock
;
1447 /* data_alloc_cluster is only used in ssd mode */
1448 struct btrfs_free_cluster data_alloc_cluster
;
1450 /* all metadata allocations go through this cluster */
1451 struct btrfs_free_cluster meta_alloc_cluster
;
1453 /* auto defrag inodes go here */
1454 spinlock_t defrag_inodes_lock
;
1455 struct rb_root defrag_inodes
;
1456 atomic_t defrag_running
;
1459 * these three are in extended format (availability of single
1460 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1461 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1463 u64 avail_data_alloc_bits
;
1464 u64 avail_metadata_alloc_bits
;
1465 u64 avail_system_alloc_bits
;
1467 /* restriper state */
1468 spinlock_t balance_lock
;
1469 struct mutex balance_mutex
;
1470 atomic_t balance_running
;
1471 atomic_t balance_pause_req
;
1472 atomic_t balance_cancel_req
;
1473 struct btrfs_balance_control
*balance_ctl
;
1474 wait_queue_head_t balance_wait_q
;
1476 unsigned data_chunk_allocations
;
1477 unsigned metadata_ratio
;
1481 /* private scrub information */
1482 struct mutex scrub_lock
;
1483 atomic_t scrubs_running
;
1484 atomic_t scrub_pause_req
;
1485 atomic_t scrubs_paused
;
1486 atomic_t scrub_cancel_req
;
1487 wait_queue_head_t scrub_pause_wait
;
1488 struct rw_semaphore scrub_super_lock
;
1489 int scrub_workers_refcnt
;
1490 struct btrfs_workers scrub_workers
;
1491 struct btrfs_workers scrub_wr_completion_workers
;
1492 struct btrfs_workers scrub_nocow_workers
;
1494 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1495 u32 check_integrity_print_mask
;
1500 unsigned int quota_enabled
:1;
1503 * quota_enabled only changes state after a commit. This holds the
1506 unsigned int pending_quota_state
:1;
1508 /* is qgroup tracking in a consistent state? */
1511 /* holds configuration and tracking. Protected by qgroup_lock */
1512 struct rb_root qgroup_tree
;
1513 spinlock_t qgroup_lock
;
1515 /* list of dirty qgroups to be written at next commit */
1516 struct list_head dirty_qgroups
;
1518 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1521 /* filesystem state */
1524 struct btrfs_delayed_root
*delayed_root
;
1526 /* readahead tree */
1527 spinlock_t reada_lock
;
1528 struct radix_tree_root reada_tree
;
1530 /* next backup root to be overwritten */
1531 int backup_root_index
;
1533 int num_tolerated_disk_barrier_failures
;
1535 /* device replace state */
1536 struct btrfs_dev_replace dev_replace
;
1538 atomic_t mutually_exclusive_operation_running
;
1542 * in ram representation of the tree. extent_root is used for all allocations
1543 * and for the extent tree extent_root root.
1546 struct extent_buffer
*node
;
1548 struct extent_buffer
*commit_root
;
1549 struct btrfs_root
*log_root
;
1550 struct btrfs_root
*reloc_root
;
1552 struct btrfs_root_item root_item
;
1553 struct btrfs_key root_key
;
1554 struct btrfs_fs_info
*fs_info
;
1555 struct extent_io_tree dirty_log_pages
;
1557 struct kobject root_kobj
;
1558 struct completion kobj_unregister
;
1559 struct mutex objectid_mutex
;
1561 spinlock_t accounting_lock
;
1562 struct btrfs_block_rsv
*block_rsv
;
1564 /* free ino cache stuff */
1565 struct mutex fs_commit_mutex
;
1566 struct btrfs_free_space_ctl
*free_ino_ctl
;
1567 enum btrfs_caching_type cached
;
1568 spinlock_t cache_lock
;
1569 wait_queue_head_t cache_wait
;
1570 struct btrfs_free_space_ctl
*free_ino_pinned
;
1572 struct inode
*cache_inode
;
1574 struct mutex log_mutex
;
1575 wait_queue_head_t log_writer_wait
;
1576 wait_queue_head_t log_commit_wait
[2];
1577 atomic_t log_writers
;
1578 atomic_t log_commit
[2];
1580 unsigned long log_transid
;
1581 unsigned long last_log_commit
;
1582 pid_t log_start_pid
;
1583 bool log_multiple_pids
;
1588 /* data allocations are done in sectorsize units */
1591 /* node allocations are done in nodesize units */
1594 /* leaf allocations are done in leafsize units */
1601 u64 highest_objectid
;
1603 /* btrfs_record_root_in_trans is a multi-step process,
1604 * and it can race with the balancing code. But the
1605 * race is very small, and only the first time the root
1606 * is added to each transaction. So in_trans_setup
1607 * is used to tell us when more checks are required
1609 unsigned long in_trans_setup
;
1614 u64 defrag_trans_start
;
1615 struct btrfs_key defrag_progress
;
1616 struct btrfs_key defrag_max
;
1620 /* the dirty list is only used by non-reference counted roots */
1621 struct list_head dirty_list
;
1623 struct list_head root_list
;
1625 spinlock_t orphan_lock
;
1626 atomic_t orphan_inodes
;
1627 struct btrfs_block_rsv
*orphan_block_rsv
;
1628 int orphan_item_inserted
;
1629 int orphan_cleanup_state
;
1631 spinlock_t inode_lock
;
1632 /* red-black tree that keeps track of in-memory inodes */
1633 struct rb_root inode_tree
;
1636 * radix tree that keeps track of delayed nodes of every inode,
1637 * protected by inode_lock
1639 struct radix_tree_root delayed_nodes_tree
;
1641 * right now this just gets used so that a root has its own devid
1642 * for stat. It may be used for more later
1648 spinlock_t root_times_lock
;
1651 struct btrfs_ioctl_defrag_range_args
{
1652 /* start of the defrag operation */
1655 /* number of bytes to defrag, use (u64)-1 to say all */
1659 * flags for the operation, which can include turning
1660 * on compression for this one defrag
1665 * any extent bigger than this will be considered
1666 * already defragged. Use 0 to take the kernel default
1667 * Use 1 to say every single extent must be rewritten
1669 __u32 extent_thresh
;
1672 * which compression method to use if turning on compression
1673 * for this defrag operation. If unspecified, zlib will
1676 __u32 compress_type
;
1678 /* spare for later */
1684 * inode items have the data typically returned from stat and store other
1685 * info about object characteristics. There is one for every file and dir in
1688 #define BTRFS_INODE_ITEM_KEY 1
1689 #define BTRFS_INODE_REF_KEY 12
1690 #define BTRFS_INODE_EXTREF_KEY 13
1691 #define BTRFS_XATTR_ITEM_KEY 24
1692 #define BTRFS_ORPHAN_ITEM_KEY 48
1693 /* reserve 2-15 close to the inode for later flexibility */
1696 * dir items are the name -> inode pointers in a directory. There is one
1697 * for every name in a directory.
1699 #define BTRFS_DIR_LOG_ITEM_KEY 60
1700 #define BTRFS_DIR_LOG_INDEX_KEY 72
1701 #define BTRFS_DIR_ITEM_KEY 84
1702 #define BTRFS_DIR_INDEX_KEY 96
1704 * extent data is for file data
1706 #define BTRFS_EXTENT_DATA_KEY 108
1709 * extent csums are stored in a separate tree and hold csums for
1710 * an entire extent on disk.
1712 #define BTRFS_EXTENT_CSUM_KEY 128
1715 * root items point to tree roots. They are typically in the root
1716 * tree used by the super block to find all the other trees
1718 #define BTRFS_ROOT_ITEM_KEY 132
1721 * root backrefs tie subvols and snapshots to the directory entries that
1724 #define BTRFS_ROOT_BACKREF_KEY 144
1727 * root refs make a fast index for listing all of the snapshots and
1728 * subvolumes referenced by a given root. They point directly to the
1729 * directory item in the root that references the subvol
1731 #define BTRFS_ROOT_REF_KEY 156
1734 * extent items are in the extent map tree. These record which blocks
1735 * are used, and how many references there are to each block
1737 #define BTRFS_EXTENT_ITEM_KEY 168
1739 #define BTRFS_TREE_BLOCK_REF_KEY 176
1741 #define BTRFS_EXTENT_DATA_REF_KEY 178
1743 #define BTRFS_EXTENT_REF_V0_KEY 180
1745 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1747 #define BTRFS_SHARED_DATA_REF_KEY 184
1750 * block groups give us hints into the extent allocation trees. Which
1751 * blocks are free etc etc
1753 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1755 #define BTRFS_DEV_EXTENT_KEY 204
1756 #define BTRFS_DEV_ITEM_KEY 216
1757 #define BTRFS_CHUNK_ITEM_KEY 228
1760 * Records the overall state of the qgroups.
1761 * There's only one instance of this key present,
1762 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1764 #define BTRFS_QGROUP_STATUS_KEY 240
1766 * Records the currently used space of the qgroup.
1767 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1769 #define BTRFS_QGROUP_INFO_KEY 242
1771 * Contains the user configured limits for the qgroup.
1772 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1774 #define BTRFS_QGROUP_LIMIT_KEY 244
1776 * Records the child-parent relationship of qgroups. For
1777 * each relation, 2 keys are present:
1778 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1779 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1781 #define BTRFS_QGROUP_RELATION_KEY 246
1783 #define BTRFS_BALANCE_ITEM_KEY 248
1786 * Persistantly stores the io stats in the device tree.
1787 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1789 #define BTRFS_DEV_STATS_KEY 249
1792 * Persistantly stores the device replace state in the device tree.
1793 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1795 #define BTRFS_DEV_REPLACE_KEY 250
1798 * string items are for debugging. They just store a short string of
1801 #define BTRFS_STRING_ITEM_KEY 253
1804 * Flags for mount options.
1806 * Note: don't forget to add new options to btrfs_show_options()
1808 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1809 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1810 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1811 #define BTRFS_MOUNT_SSD (1 << 3)
1812 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1813 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1814 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1815 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1816 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1817 #define BTRFS_MOUNT_NOSSD (1 << 9)
1818 #define BTRFS_MOUNT_DISCARD (1 << 10)
1819 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1820 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1821 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1822 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1823 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1824 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1825 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1826 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1827 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1828 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1829 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1830 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1832 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1833 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1834 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1839 #define BTRFS_INODE_NODATASUM (1 << 0)
1840 #define BTRFS_INODE_NODATACOW (1 << 1)
1841 #define BTRFS_INODE_READONLY (1 << 2)
1842 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1843 #define BTRFS_INODE_PREALLOC (1 << 4)
1844 #define BTRFS_INODE_SYNC (1 << 5)
1845 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1846 #define BTRFS_INODE_APPEND (1 << 7)
1847 #define BTRFS_INODE_NODUMP (1 << 8)
1848 #define BTRFS_INODE_NOATIME (1 << 9)
1849 #define BTRFS_INODE_DIRSYNC (1 << 10)
1850 #define BTRFS_INODE_COMPRESS (1 << 11)
1852 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1854 struct btrfs_map_token
{
1855 struct extent_buffer
*eb
;
1857 unsigned long offset
;
1860 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1862 memset(token
, 0, sizeof(*token
));
1865 /* some macros to generate set/get funcs for the struct fields. This
1866 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1869 #define le8_to_cpu(v) (v)
1870 #define cpu_to_le8(v) (v)
1873 #define read_eb_member(eb, ptr, type, member, result) ( \
1874 read_extent_buffer(eb, (char *)(result), \
1875 ((unsigned long)(ptr)) + \
1876 offsetof(type, member), \
1877 sizeof(((type *)0)->member)))
1879 #define write_eb_member(eb, ptr, type, member, result) ( \
1880 write_extent_buffer(eb, (char *)(result), \
1881 ((unsigned long)(ptr)) + \
1882 offsetof(type, member), \
1883 sizeof(((type *)0)->member)))
1885 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1886 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1887 unsigned long off, \
1888 struct btrfs_map_token *token); \
1889 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1890 unsigned long off, u##bits val, \
1891 struct btrfs_map_token *token); \
1892 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1893 unsigned long off) \
1895 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1897 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1898 unsigned long off, u##bits val) \
1900 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1903 DECLARE_BTRFS_SETGET_BITS(8)
1904 DECLARE_BTRFS_SETGET_BITS(16)
1905 DECLARE_BTRFS_SETGET_BITS(32)
1906 DECLARE_BTRFS_SETGET_BITS(64)
1908 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1909 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1911 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1912 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1914 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1917 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1918 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1920 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1921 struct btrfs_map_token *token) \
1923 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1924 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1926 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1927 type *s, u##bits val, \
1928 struct btrfs_map_token *token) \
1930 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1931 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1934 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1935 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1937 type *p = page_address(eb->pages[0]); \
1938 u##bits res = le##bits##_to_cpu(p->member); \
1941 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1944 type *p = page_address(eb->pages[0]); \
1945 p->member = cpu_to_le##bits(val); \
1948 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1949 static inline u##bits btrfs_##name(type *s) \
1951 return le##bits##_to_cpu(s->member); \
1953 static inline void btrfs_set_##name(type *s, u##bits val) \
1955 s->member = cpu_to_le##bits(val); \
1958 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1959 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1960 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1961 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1962 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1963 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1965 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1966 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1967 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1968 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1969 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1970 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1972 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1973 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1975 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1977 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1979 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1981 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1983 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1984 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1986 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1988 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1990 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1993 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1995 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1998 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
2000 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2003 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2004 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2005 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2006 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2007 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2008 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2009 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2010 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2011 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2012 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2013 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2015 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2017 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2020 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2021 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2022 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2024 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2026 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2028 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2030 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2031 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2033 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2035 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2036 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2038 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2041 unsigned long offset
= (unsigned long)c
;
2042 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2043 offset
+= nr
* sizeof(struct btrfs_stripe
);
2044 return (struct btrfs_stripe
*)offset
;
2047 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2049 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2052 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2053 struct btrfs_chunk
*c
, int nr
)
2055 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2058 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2059 struct btrfs_chunk
*c
, int nr
)
2061 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2064 /* struct btrfs_block_group_item */
2065 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2067 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2069 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2070 struct btrfs_block_group_item
, chunk_objectid
, 64);
2072 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2073 struct btrfs_block_group_item
, chunk_objectid
, 64);
2074 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2075 struct btrfs_block_group_item
, flags
, 64);
2076 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2077 struct btrfs_block_group_item
, flags
, 64);
2079 /* struct btrfs_inode_ref */
2080 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2081 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2083 /* struct btrfs_inode_extref */
2084 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2085 parent_objectid
, 64);
2086 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2088 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2090 /* struct btrfs_inode_item */
2091 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2092 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2093 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2094 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2095 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2096 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2097 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2098 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2099 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2100 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2101 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2102 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2104 static inline struct btrfs_timespec
*
2105 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2107 unsigned long ptr
= (unsigned long)inode_item
;
2108 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2109 return (struct btrfs_timespec
*)ptr
;
2112 static inline struct btrfs_timespec
*
2113 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2115 unsigned long ptr
= (unsigned long)inode_item
;
2116 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2117 return (struct btrfs_timespec
*)ptr
;
2120 static inline struct btrfs_timespec
*
2121 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2123 unsigned long ptr
= (unsigned long)inode_item
;
2124 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2125 return (struct btrfs_timespec
*)ptr
;
2128 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2129 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2131 /* struct btrfs_dev_extent */
2132 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2134 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2135 chunk_objectid
, 64);
2136 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2138 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2140 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2142 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2143 return (u8
*)((unsigned long)dev
+ ptr
);
2146 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2147 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2149 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2151 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2154 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2156 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2157 struct btrfs_tree_block_info
*item
,
2158 struct btrfs_disk_key
*key
)
2160 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2163 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2164 struct btrfs_tree_block_info
*item
,
2165 struct btrfs_disk_key
*key
)
2167 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2170 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2172 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2174 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2176 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2179 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2182 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2184 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2187 static inline u32
btrfs_extent_inline_ref_size(int type
)
2189 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2190 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2191 return sizeof(struct btrfs_extent_inline_ref
);
2192 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2193 return sizeof(struct btrfs_shared_data_ref
) +
2194 sizeof(struct btrfs_extent_inline_ref
);
2195 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2196 return sizeof(struct btrfs_extent_data_ref
) +
2197 offsetof(struct btrfs_extent_inline_ref
, offset
);
2202 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2203 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2205 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2206 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2208 /* struct btrfs_node */
2209 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2210 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2212 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2215 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2216 sizeof(struct btrfs_key_ptr
) * nr
;
2217 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2220 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2224 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2225 sizeof(struct btrfs_key_ptr
) * nr
;
2226 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2229 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2232 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2233 sizeof(struct btrfs_key_ptr
) * nr
;
2234 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2237 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2241 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2242 sizeof(struct btrfs_key_ptr
) * nr
;
2243 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2246 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2248 return offsetof(struct btrfs_node
, ptrs
) +
2249 sizeof(struct btrfs_key_ptr
) * nr
;
2252 void btrfs_node_key(struct extent_buffer
*eb
,
2253 struct btrfs_disk_key
*disk_key
, int nr
);
2255 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2256 struct btrfs_disk_key
*disk_key
, int nr
)
2259 ptr
= btrfs_node_key_ptr_offset(nr
);
2260 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2261 struct btrfs_key_ptr
, key
, disk_key
);
2264 /* struct btrfs_item */
2265 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2266 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2268 static inline unsigned long btrfs_item_nr_offset(int nr
)
2270 return offsetof(struct btrfs_leaf
, items
) +
2271 sizeof(struct btrfs_item
) * nr
;
2274 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
2277 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2280 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2281 struct btrfs_item
*item
)
2283 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2286 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2288 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
2291 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2293 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
2296 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2298 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
2301 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2302 struct btrfs_disk_key
*disk_key
, int nr
)
2304 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2305 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2308 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2309 struct btrfs_disk_key
*disk_key
, int nr
)
2311 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2312 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2315 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2318 * struct btrfs_root_ref
2320 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2321 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2322 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2324 /* struct btrfs_dir_item */
2325 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2326 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2327 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2328 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2330 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2331 struct btrfs_dir_item
*item
,
2332 struct btrfs_disk_key
*key
)
2334 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2337 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2338 struct btrfs_dir_item
*item
,
2339 struct btrfs_disk_key
*key
)
2341 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2344 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2346 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2348 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2351 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2352 struct btrfs_free_space_header
*h
,
2353 struct btrfs_disk_key
*key
)
2355 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2358 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2359 struct btrfs_free_space_header
*h
,
2360 struct btrfs_disk_key
*key
)
2362 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2365 /* struct btrfs_disk_key */
2366 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2368 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2369 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2371 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2372 struct btrfs_disk_key
*disk
)
2374 cpu
->offset
= le64_to_cpu(disk
->offset
);
2375 cpu
->type
= disk
->type
;
2376 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2379 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2380 struct btrfs_key
*cpu
)
2382 disk
->offset
= cpu_to_le64(cpu
->offset
);
2383 disk
->type
= cpu
->type
;
2384 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2387 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2388 struct btrfs_key
*key
, int nr
)
2390 struct btrfs_disk_key disk_key
;
2391 btrfs_node_key(eb
, &disk_key
, nr
);
2392 btrfs_disk_key_to_cpu(key
, &disk_key
);
2395 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2396 struct btrfs_key
*key
, int nr
)
2398 struct btrfs_disk_key disk_key
;
2399 btrfs_item_key(eb
, &disk_key
, nr
);
2400 btrfs_disk_key_to_cpu(key
, &disk_key
);
2403 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2404 struct btrfs_dir_item
*item
,
2405 struct btrfs_key
*key
)
2407 struct btrfs_disk_key disk_key
;
2408 btrfs_dir_item_key(eb
, item
, &disk_key
);
2409 btrfs_disk_key_to_cpu(key
, &disk_key
);
2413 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2418 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2423 /* struct btrfs_header */
2424 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2425 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2427 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2428 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2429 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2430 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2432 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2434 return (btrfs_header_flags(eb
) & flag
) == flag
;
2437 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2439 u64 flags
= btrfs_header_flags(eb
);
2440 btrfs_set_header_flags(eb
, flags
| flag
);
2441 return (flags
& flag
) == flag
;
2444 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2446 u64 flags
= btrfs_header_flags(eb
);
2447 btrfs_set_header_flags(eb
, flags
& ~flag
);
2448 return (flags
& flag
) == flag
;
2451 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2453 u64 flags
= btrfs_header_flags(eb
);
2454 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2457 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2460 u64 flags
= btrfs_header_flags(eb
);
2461 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2462 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2463 btrfs_set_header_flags(eb
, flags
);
2466 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2468 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2472 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2474 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2478 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2480 return btrfs_header_level(eb
) == 0;
2483 /* struct btrfs_root_item */
2484 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2486 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2487 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2488 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2490 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2492 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2493 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2494 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2495 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2496 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2497 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2498 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2499 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2501 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2503 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2505 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2507 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2509 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2512 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2514 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2517 /* struct btrfs_root_backup */
2518 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2520 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2522 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2523 tree_root_level
, 8);
2525 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2527 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2528 chunk_root_gen
, 64);
2529 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2530 chunk_root_level
, 8);
2532 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2534 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2535 extent_root_gen
, 64);
2536 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2537 extent_root_level
, 8);
2539 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2541 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2543 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2546 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2548 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2550 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2553 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2555 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2557 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2558 csum_root_level
, 8);
2559 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2561 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2563 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2566 /* struct btrfs_balance_item */
2567 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2569 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2570 struct btrfs_balance_item
*bi
,
2571 struct btrfs_disk_balance_args
*ba
)
2573 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2576 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2577 struct btrfs_balance_item
*bi
,
2578 struct btrfs_disk_balance_args
*ba
)
2580 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2583 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2584 struct btrfs_balance_item
*bi
,
2585 struct btrfs_disk_balance_args
*ba
)
2587 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2590 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2591 struct btrfs_balance_item
*bi
,
2592 struct btrfs_disk_balance_args
*ba
)
2594 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2597 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2598 struct btrfs_balance_item
*bi
,
2599 struct btrfs_disk_balance_args
*ba
)
2601 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2604 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2605 struct btrfs_balance_item
*bi
,
2606 struct btrfs_disk_balance_args
*ba
)
2608 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2612 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2613 struct btrfs_disk_balance_args
*disk
)
2615 memset(cpu
, 0, sizeof(*cpu
));
2617 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2618 cpu
->usage
= le64_to_cpu(disk
->usage
);
2619 cpu
->devid
= le64_to_cpu(disk
->devid
);
2620 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2621 cpu
->pend
= le64_to_cpu(disk
->pend
);
2622 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2623 cpu
->vend
= le64_to_cpu(disk
->vend
);
2624 cpu
->target
= le64_to_cpu(disk
->target
);
2625 cpu
->flags
= le64_to_cpu(disk
->flags
);
2629 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2630 struct btrfs_balance_args
*cpu
)
2632 memset(disk
, 0, sizeof(*disk
));
2634 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2635 disk
->usage
= cpu_to_le64(cpu
->usage
);
2636 disk
->devid
= cpu_to_le64(cpu
->devid
);
2637 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2638 disk
->pend
= cpu_to_le64(cpu
->pend
);
2639 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2640 disk
->vend
= cpu_to_le64(cpu
->vend
);
2641 disk
->target
= cpu_to_le64(cpu
->target
);
2642 disk
->flags
= cpu_to_le64(cpu
->flags
);
2645 /* struct btrfs_super_block */
2646 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2647 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2648 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2650 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2651 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2652 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2653 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2654 struct btrfs_super_block
, chunk_root_generation
, 64);
2655 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2657 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2659 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2660 chunk_root_level
, 8);
2661 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2663 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2664 log_root_transid
, 64);
2665 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2667 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2669 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2671 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2673 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2675 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2677 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2679 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2680 root_dir_objectid
, 64);
2681 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2683 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2685 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2686 compat_ro_flags
, 64);
2687 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2688 incompat_flags
, 64);
2689 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2691 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2692 cache_generation
, 64);
2694 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2696 int t
= btrfs_super_csum_type(s
);
2697 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2698 return btrfs_csum_sizes
[t
];
2701 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2703 return offsetof(struct btrfs_leaf
, items
);
2706 /* struct btrfs_file_extent_item */
2707 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2709 static inline unsigned long
2710 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2712 unsigned long offset
= (unsigned long)e
;
2713 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2717 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2719 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2722 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2724 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2726 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2727 disk_num_bytes
, 64);
2728 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2730 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2732 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2734 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2736 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2738 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2739 other_encoding
, 16);
2741 /* this returns the number of file bytes represented by the inline item.
2742 * If an item is compressed, this is the uncompressed size
2744 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2745 struct btrfs_file_extent_item
*e
)
2747 return btrfs_file_extent_ram_bytes(eb
, e
);
2751 * this returns the number of bytes used by the item on disk, minus the
2752 * size of any extent headers. If a file is compressed on disk, this is
2753 * the compressed size
2755 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2756 struct btrfs_item
*e
)
2758 unsigned long offset
;
2759 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2760 return btrfs_item_size(eb
, e
) - offset
;
2763 /* btrfs_dev_stats_item */
2764 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2765 struct btrfs_dev_stats_item
*ptr
,
2770 read_extent_buffer(eb
, &val
,
2771 offsetof(struct btrfs_dev_stats_item
, values
) +
2772 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2777 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2778 struct btrfs_dev_stats_item
*ptr
,
2781 write_extent_buffer(eb
, &val
,
2782 offsetof(struct btrfs_dev_stats_item
, values
) +
2783 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2787 /* btrfs_qgroup_status_item */
2788 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2790 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2792 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2794 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2797 /* btrfs_qgroup_info_item */
2798 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2800 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2801 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2803 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2804 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2807 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2808 struct btrfs_qgroup_info_item
, generation
, 64);
2809 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2811 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2812 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2813 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2815 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2816 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2818 /* btrfs_qgroup_limit_item */
2819 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2821 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2823 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2825 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2827 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2830 /* btrfs_dev_replace_item */
2831 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2832 struct btrfs_dev_replace_item
, src_devid
, 64);
2833 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2834 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2836 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2838 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2840 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2842 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2843 num_write_errors
, 64);
2844 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2845 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2847 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2849 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2852 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2853 struct btrfs_dev_replace_item
, src_devid
, 64);
2854 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2855 struct btrfs_dev_replace_item
,
2856 cont_reading_from_srcdev_mode
, 64);
2857 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2858 struct btrfs_dev_replace_item
, replace_state
, 64);
2859 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2860 struct btrfs_dev_replace_item
, time_started
, 64);
2861 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2862 struct btrfs_dev_replace_item
, time_stopped
, 64);
2863 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2864 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2865 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2866 struct btrfs_dev_replace_item
,
2867 num_uncorrectable_read_errors
, 64);
2868 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2869 struct btrfs_dev_replace_item
, cursor_left
, 64);
2870 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2871 struct btrfs_dev_replace_item
, cursor_right
, 64);
2873 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2875 return sb
->s_fs_info
;
2878 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2881 return root
->leafsize
;
2882 return root
->nodesize
;
2885 /* helper function to cast into the data area of the leaf. */
2886 #define btrfs_item_ptr(leaf, slot, type) \
2887 ((type *)(btrfs_leaf_data(leaf) + \
2888 btrfs_item_offset_nr(leaf, slot)))
2890 #define btrfs_item_ptr_offset(leaf, slot) \
2891 ((unsigned long)(btrfs_leaf_data(leaf) + \
2892 btrfs_item_offset_nr(leaf, slot)))
2894 static inline struct dentry
*fdentry(struct file
*file
)
2896 return file
->f_path
.dentry
;
2899 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2901 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2902 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2905 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2907 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2911 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2914 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2919 * Doing a truncate won't result in new nodes or leaves, just what we need for
2922 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2925 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2929 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2930 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2931 struct btrfs_root
*root
, unsigned long count
);
2932 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2933 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2934 struct btrfs_root
*root
, u64 bytenr
,
2935 u64 num_bytes
, u64
*refs
, u64
*flags
);
2936 int btrfs_pin_extent(struct btrfs_root
*root
,
2937 u64 bytenr
, u64 num
, int reserved
);
2938 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2939 struct btrfs_root
*root
,
2940 u64 bytenr
, u64 num_bytes
);
2941 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2942 struct btrfs_root
*root
,
2943 u64 objectid
, u64 offset
, u64 bytenr
);
2944 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2945 struct btrfs_fs_info
*info
,
2947 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2948 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2949 u64 search_start
, u64 search_hint
, int owner
);
2950 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2951 struct btrfs_root
*root
, u32 blocksize
,
2952 u64 parent
, u64 root_objectid
,
2953 struct btrfs_disk_key
*key
, int level
,
2954 u64 hint
, u64 empty_size
);
2955 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2956 struct btrfs_root
*root
,
2957 struct extent_buffer
*buf
,
2958 u64 parent
, int last_ref
);
2959 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2960 struct btrfs_root
*root
,
2961 u64 bytenr
, u32 blocksize
,
2963 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2964 struct btrfs_root
*root
,
2965 u64 root_objectid
, u64 owner
,
2966 u64 offset
, struct btrfs_key
*ins
);
2967 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2968 struct btrfs_root
*root
,
2969 u64 root_objectid
, u64 owner
, u64 offset
,
2970 struct btrfs_key
*ins
);
2971 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2972 struct btrfs_root
*root
,
2973 u64 num_bytes
, u64 min_alloc_size
,
2974 u64 empty_size
, u64 hint_byte
,
2975 struct btrfs_key
*ins
, u64 data
);
2976 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2977 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2978 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2979 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2980 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2981 struct btrfs_root
*root
,
2982 u64 bytenr
, u64 num_bytes
, u64 flags
,
2984 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2985 struct btrfs_root
*root
,
2986 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2987 u64 owner
, u64 offset
, int for_cow
);
2989 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2990 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2991 u64 start
, u64 len
);
2992 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2993 struct btrfs_root
*root
);
2994 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2995 struct btrfs_root
*root
);
2996 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2997 struct btrfs_root
*root
,
2998 u64 bytenr
, u64 num_bytes
, u64 parent
,
2999 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3001 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3002 struct btrfs_root
*root
);
3003 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3004 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3005 int btrfs_read_block_groups(struct btrfs_root
*root
);
3006 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3007 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3008 struct btrfs_root
*root
, u64 bytes_used
,
3009 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3011 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3012 struct btrfs_root
*root
, u64 group_start
);
3013 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3014 struct btrfs_root
*root
);
3015 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
3016 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3017 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3019 enum btrfs_reserve_flush_enum
{
3020 /* If we are in the transaction, we can't flush anything.*/
3021 BTRFS_RESERVE_NO_FLUSH
,
3023 * Flushing delalloc may cause deadlock somewhere, in this
3024 * case, use FLUSH LIMIT
3026 BTRFS_RESERVE_FLUSH_LIMIT
,
3027 BTRFS_RESERVE_FLUSH_ALL
,
3030 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3031 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3032 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3033 struct btrfs_root
*root
);
3034 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3035 struct inode
*inode
);
3036 void btrfs_orphan_release_metadata(struct inode
*inode
);
3037 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
3038 struct btrfs_pending_snapshot
*pending
);
3039 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3040 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3041 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3042 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3043 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3044 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3045 unsigned short type
);
3046 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3047 struct btrfs_block_rsv
*rsv
);
3048 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3049 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3050 enum btrfs_reserve_flush_enum flush
);
3051 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3052 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3053 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3054 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3055 enum btrfs_reserve_flush_enum flush
);
3056 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3057 struct btrfs_block_rsv
*dst_rsv
,
3059 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3060 struct btrfs_block_rsv
*block_rsv
,
3062 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3063 struct btrfs_block_group_cache
*cache
);
3064 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3065 struct btrfs_block_group_cache
*cache
);
3066 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3067 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3068 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3069 u64 start
, u64 end
);
3070 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3071 u64 num_bytes
, u64
*actual_bytes
);
3072 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3073 struct btrfs_root
*root
, u64 type
);
3074 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3076 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3077 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3078 struct btrfs_fs_info
*fs_info
);
3080 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3081 int level
, int *slot
);
3082 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3083 int btrfs_previous_item(struct btrfs_root
*root
,
3084 struct btrfs_path
*path
, u64 min_objectid
,
3086 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
3087 struct btrfs_root
*root
, struct btrfs_path
*path
,
3088 struct btrfs_key
*new_key
);
3089 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3090 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3091 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3092 struct btrfs_key
*key
, int lowest_level
,
3093 int cache_only
, u64 min_trans
);
3094 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3095 struct btrfs_key
*max_key
,
3096 struct btrfs_path
*path
, int cache_only
,
3098 enum btrfs_compare_tree_result
{
3099 BTRFS_COMPARE_TREE_NEW
,
3100 BTRFS_COMPARE_TREE_DELETED
,
3101 BTRFS_COMPARE_TREE_CHANGED
,
3103 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3104 struct btrfs_root
*right_root
,
3105 struct btrfs_path
*left_path
,
3106 struct btrfs_path
*right_path
,
3107 struct btrfs_key
*key
,
3108 enum btrfs_compare_tree_result result
,
3110 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3111 struct btrfs_root
*right_root
,
3112 btrfs_changed_cb_t cb
, void *ctx
);
3113 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3114 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3115 struct extent_buffer
*parent
, int parent_slot
,
3116 struct extent_buffer
**cow_ret
);
3117 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3118 struct btrfs_root
*root
,
3119 struct extent_buffer
*buf
,
3120 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3121 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3122 struct extent_buffer
*buf
);
3123 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
3124 struct btrfs_root
*root
, struct btrfs_path
*path
,
3126 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
3127 struct btrfs_root
*root
,
3128 struct btrfs_path
*path
,
3129 u32 new_size
, int from_end
);
3130 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3131 struct btrfs_root
*root
,
3132 struct btrfs_path
*path
,
3133 struct btrfs_key
*new_key
,
3134 unsigned long split_offset
);
3135 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3136 struct btrfs_root
*root
,
3137 struct btrfs_path
*path
,
3138 struct btrfs_key
*new_key
);
3139 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3140 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3142 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3143 struct btrfs_path
*p
, u64 time_seq
);
3144 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3145 struct btrfs_key
*key
, struct btrfs_path
*p
,
3146 int find_higher
, int return_any
);
3147 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3148 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3149 int start_slot
, int cache_only
, u64
*last_ret
,
3150 struct btrfs_key
*progress
);
3151 void btrfs_release_path(struct btrfs_path
*p
);
3152 struct btrfs_path
*btrfs_alloc_path(void);
3153 void btrfs_free_path(struct btrfs_path
*p
);
3154 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3155 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3156 struct extent_buffer
*held
, int held_rw
);
3157 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3159 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3160 struct btrfs_path
*path
, int slot
, int nr
);
3161 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3162 struct btrfs_root
*root
,
3163 struct btrfs_path
*path
)
3165 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3168 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
3169 struct btrfs_root
*root
, struct btrfs_path
*path
,
3170 struct btrfs_key
*cpu_key
, u32
*data_size
,
3171 u32 total_data
, u32 total_size
, int nr
);
3172 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3173 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3174 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3175 struct btrfs_root
*root
,
3176 struct btrfs_path
*path
,
3177 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3179 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3180 struct btrfs_root
*root
,
3181 struct btrfs_path
*path
,
3182 struct btrfs_key
*key
,
3185 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3188 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3189 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3191 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3192 struct btrfs_path
*p
, u64 time_seq
)
3195 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3196 return btrfs_next_old_leaf(root
, p
, time_seq
);
3199 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3201 return btrfs_next_old_item(root
, p
, 0);
3203 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3204 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3205 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3206 struct btrfs_block_rsv
*block_rsv
,
3207 int update_ref
, int for_reloc
);
3208 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3209 struct btrfs_root
*root
,
3210 struct extent_buffer
*node
,
3211 struct extent_buffer
*parent
);
3212 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3215 * Get synced with close_ctree()
3218 return fs_info
->closing
;
3220 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3222 kfree(fs_info
->balance_ctl
);
3223 kfree(fs_info
->delayed_root
);
3224 kfree(fs_info
->extent_root
);
3225 kfree(fs_info
->tree_root
);
3226 kfree(fs_info
->chunk_root
);
3227 kfree(fs_info
->dev_root
);
3228 kfree(fs_info
->csum_root
);
3229 kfree(fs_info
->quota_root
);
3230 kfree(fs_info
->super_copy
);
3231 kfree(fs_info
->super_for_commit
);
3235 /* tree mod log functions from ctree.c */
3236 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3237 struct seq_list
*elem
);
3238 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3239 struct seq_list
*elem
);
3240 static inline u64
btrfs_inc_tree_mod_seq(struct btrfs_fs_info
*fs_info
)
3242 return atomic_inc_return(&fs_info
->tree_mod_seq
);
3244 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3247 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3248 struct btrfs_path
*path
,
3249 u64 root_id
, u64 ref_id
);
3250 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3251 struct btrfs_root
*tree_root
,
3252 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3253 const char *name
, int name_len
);
3254 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3255 struct btrfs_root
*tree_root
,
3256 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3257 const char *name
, int name_len
);
3258 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3259 struct btrfs_key
*key
);
3260 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3261 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3263 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3264 struct btrfs_root
*root
,
3265 struct btrfs_key
*key
,
3266 struct btrfs_root_item
*item
);
3267 void btrfs_read_root_item(struct btrfs_root
*root
,
3268 struct extent_buffer
*eb
, int slot
,
3269 struct btrfs_root_item
*item
);
3270 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
3271 btrfs_root_item
*item
, struct btrfs_key
*key
);
3272 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
3273 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3274 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3275 struct extent_buffer
*node
);
3276 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3277 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3278 struct btrfs_root
*root
);
3281 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3282 struct btrfs_root
*root
, const char *name
,
3283 int name_len
, struct inode
*dir
,
3284 struct btrfs_key
*location
, u8 type
, u64 index
);
3285 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3286 struct btrfs_root
*root
,
3287 struct btrfs_path
*path
, u64 dir
,
3288 const char *name
, int name_len
,
3290 struct btrfs_dir_item
*
3291 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3292 struct btrfs_root
*root
,
3293 struct btrfs_path
*path
, u64 dir
,
3294 u64 objectid
, const char *name
, int name_len
,
3296 struct btrfs_dir_item
*
3297 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3298 struct btrfs_path
*path
, u64 dirid
,
3299 const char *name
, int name_len
);
3300 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3301 struct btrfs_path
*path
,
3302 const char *name
, int name_len
);
3303 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3304 struct btrfs_root
*root
,
3305 struct btrfs_path
*path
,
3306 struct btrfs_dir_item
*di
);
3307 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3308 struct btrfs_root
*root
,
3309 struct btrfs_path
*path
, u64 objectid
,
3310 const char *name
, u16 name_len
,
3311 const void *data
, u16 data_len
);
3312 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3313 struct btrfs_root
*root
,
3314 struct btrfs_path
*path
, u64 dir
,
3315 const char *name
, u16 name_len
,
3317 int verify_dir_item(struct btrfs_root
*root
,
3318 struct extent_buffer
*leaf
,
3319 struct btrfs_dir_item
*dir_item
);
3322 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3323 struct btrfs_root
*root
, u64 offset
);
3324 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3325 struct btrfs_root
*root
, u64 offset
);
3326 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3329 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3330 struct btrfs_root
*root
,
3331 const char *name
, int name_len
,
3332 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3333 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3334 struct btrfs_root
*root
,
3335 const char *name
, int name_len
,
3336 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3337 int btrfs_get_inode_ref_index(struct btrfs_trans_handle
*trans
,
3338 struct btrfs_root
*root
,
3339 struct btrfs_path
*path
,
3340 const char *name
, int name_len
,
3341 u64 inode_objectid
, u64 ref_objectid
, int mod
,
3343 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3344 struct btrfs_root
*root
,
3345 struct btrfs_path
*path
, u64 objectid
);
3346 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3347 *root
, struct btrfs_path
*path
,
3348 struct btrfs_key
*location
, int mod
);
3350 struct btrfs_inode_extref
*
3351 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3352 struct btrfs_root
*root
,
3353 struct btrfs_path
*path
,
3354 const char *name
, int name_len
,
3355 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3358 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3359 u64 ref_objectid
, const char *name
,
3361 struct btrfs_inode_extref
**extref_ret
);
3364 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3365 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3366 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3367 struct bio
*bio
, u32
*dst
);
3368 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3369 struct bio
*bio
, u64 logical_offset
);
3370 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3371 struct btrfs_root
*root
,
3372 u64 objectid
, u64 pos
,
3373 u64 disk_offset
, u64 disk_num_bytes
,
3374 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3375 u8 compression
, u8 encryption
, u16 other_encoding
);
3376 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3377 struct btrfs_root
*root
,
3378 struct btrfs_path
*path
, u64 objectid
,
3379 u64 bytenr
, int mod
);
3380 u64
btrfs_file_extent_length(struct btrfs_path
*path
);
3381 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3382 struct btrfs_root
*root
,
3383 struct btrfs_ordered_sum
*sums
);
3384 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3385 struct bio
*bio
, u64 file_start
, int contig
);
3386 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
3387 struct btrfs_root
*root
,
3388 struct btrfs_path
*path
,
3389 u64 bytenr
, int cow
);
3390 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
3391 struct btrfs_root
*root
, struct btrfs_path
*path
,
3393 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3394 struct list_head
*list
, int search_commit
);
3396 struct btrfs_delalloc_work
{
3397 struct inode
*inode
;
3400 struct completion completion
;
3401 struct list_head list
;
3402 struct btrfs_work work
;
3405 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3406 int wait
, int delay_iput
);
3407 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3409 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3410 size_t pg_offset
, u64 start
, u64 len
,
3413 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3414 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3415 #define ClearPageChecked ClearPageFsMisc
3416 #define SetPageChecked SetPageFsMisc
3417 #define PageChecked PageFsMisc
3420 /* This forces readahead on a given range of bytes in an inode */
3421 static inline void btrfs_force_ra(struct address_space
*mapping
,
3422 struct file_ra_state
*ra
, struct file
*file
,
3423 pgoff_t offset
, unsigned long req_size
)
3425 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3428 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3429 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3430 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3431 struct btrfs_root
*root
,
3432 struct inode
*dir
, struct inode
*inode
,
3433 const char *name
, int name_len
);
3434 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3435 struct inode
*parent_inode
, struct inode
*inode
,
3436 const char *name
, int name_len
, int add_backref
, u64 index
);
3437 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3438 struct btrfs_root
*root
,
3439 struct inode
*dir
, u64 objectid
,
3440 const char *name
, int name_len
);
3441 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3443 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3444 struct btrfs_root
*root
,
3445 struct inode
*inode
, u64 new_size
,
3448 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3449 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3450 struct extent_state
**cached_state
);
3451 int btrfs_writepages(struct address_space
*mapping
,
3452 struct writeback_control
*wbc
);
3453 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3454 struct btrfs_root
*new_root
, u64 new_dirid
);
3455 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3456 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
3458 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3459 int btrfs_readpage(struct file
*file
, struct page
*page
);
3460 void btrfs_evict_inode(struct inode
*inode
);
3461 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3462 int btrfs_dirty_inode(struct inode
*inode
);
3463 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3464 void btrfs_destroy_inode(struct inode
*inode
);
3465 int btrfs_drop_inode(struct inode
*inode
);
3466 int btrfs_init_cachep(void);
3467 void btrfs_destroy_cachep(void);
3468 long btrfs_ioctl_trans_end(struct file
*file
);
3469 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3470 struct btrfs_root
*root
, int *was_new
);
3471 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3472 size_t pg_offset
, u64 start
, u64 end
,
3474 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3475 struct btrfs_root
*root
,
3476 struct inode
*inode
);
3477 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3478 struct btrfs_root
*root
, struct inode
*inode
);
3479 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3480 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3481 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3482 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3483 struct btrfs_root
*root
);
3484 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3485 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3486 void btrfs_add_delayed_iput(struct inode
*inode
);
3487 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3488 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3489 u64 start
, u64 num_bytes
, u64 min_size
,
3490 loff_t actual_len
, u64
*alloc_hint
);
3491 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3492 struct btrfs_trans_handle
*trans
, int mode
,
3493 u64 start
, u64 num_bytes
, u64 min_size
,
3494 loff_t actual_len
, u64
*alloc_hint
);
3495 extern const struct dentry_operations btrfs_dentry_operations
;
3498 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3499 void btrfs_update_iflags(struct inode
*inode
);
3500 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3501 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3502 struct btrfs_ioctl_defrag_range_args
*range
,
3503 u64 newer_than
, unsigned long max_pages
);
3504 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3505 struct btrfs_ioctl_space_info
*space
);
3508 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3509 struct inode
*inode
);
3510 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3511 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3512 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3514 int btrfs_replace_extent_cache(struct inode
*inode
, struct extent_map
*replace
,
3515 u64 start
, u64 end
, int skip_pinned
,
3517 extern const struct file_operations btrfs_file_operations
;
3518 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3519 struct btrfs_root
*root
, struct inode
*inode
,
3520 struct btrfs_path
*path
, u64 start
, u64 end
,
3521 u64
*drop_end
, int drop_cache
);
3522 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3523 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3524 u64 end
, int drop_cache
);
3525 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3526 struct inode
*inode
, u64 start
, u64 end
);
3527 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3528 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
3529 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3530 struct page
**pages
, size_t num_pages
,
3531 loff_t pos
, size_t write_bytes
,
3532 struct extent_state
**cached
);
3535 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3536 struct btrfs_root
*root
, int cache_only
);
3539 int btrfs_init_sysfs(void);
3540 void btrfs_exit_sysfs(void);
3543 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3546 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3547 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3549 #ifdef CONFIG_PRINTK
3551 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3553 static inline __printf(2, 3)
3554 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3560 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3561 unsigned int line
, int errno
, const char *fmt
, ...);
3564 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3565 struct btrfs_root
*root
, const char *function
,
3566 unsigned int line
, int errno
);
3568 #define btrfs_set_fs_incompat(__fs_info, opt) \
3569 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3571 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3574 struct btrfs_super_block
*disk_super
;
3577 disk_super
= fs_info
->super_copy
;
3578 features
= btrfs_super_incompat_flags(disk_super
);
3579 if (!(features
& flag
)) {
3581 btrfs_set_super_incompat_flags(disk_super
, features
);
3586 * Call btrfs_abort_transaction as early as possible when an error condition is
3587 * detected, that way the exact line number is reported.
3590 #define btrfs_abort_transaction(trans, root, errno) \
3592 __btrfs_abort_transaction(trans, root, __func__, \
3596 #define btrfs_std_error(fs_info, errno) \
3599 __btrfs_std_error((fs_info), __func__, \
3600 __LINE__, (errno), NULL); \
3603 #define btrfs_error(fs_info, errno, fmt, args...) \
3605 __btrfs_std_error((fs_info), __func__, __LINE__, \
3606 (errno), fmt, ##args); \
3610 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3611 unsigned int line
, int errno
, const char *fmt
, ...);
3613 #define btrfs_panic(fs_info, errno, fmt, args...) \
3615 struct btrfs_fs_info *_i = (fs_info); \
3616 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3617 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3621 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3622 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3623 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3624 struct inode
*inode
, struct inode
*dir
);
3625 int btrfs_acl_chmod(struct inode
*inode
);
3627 #define btrfs_get_acl NULL
3628 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3629 struct inode
*inode
, struct inode
*dir
)
3633 static inline int btrfs_acl_chmod(struct inode
*inode
)
3640 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3641 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3642 struct btrfs_root
*root
);
3643 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3644 struct btrfs_root
*root
);
3645 int btrfs_recover_relocation(struct btrfs_root
*root
);
3646 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3647 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3648 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3649 struct extent_buffer
*cow
);
3650 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3651 struct btrfs_pending_snapshot
*pending
,
3652 u64
*bytes_to_reserve
);
3653 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3654 struct btrfs_pending_snapshot
*pending
);
3657 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3658 u64 end
, struct btrfs_scrub_progress
*progress
,
3659 int readonly
, int is_dev_replace
);
3660 void btrfs_scrub_pause(struct btrfs_root
*root
);
3661 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3662 void btrfs_scrub_continue(struct btrfs_root
*root
);
3663 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3664 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3665 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3666 struct btrfs_device
*dev
);
3667 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3668 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3669 struct btrfs_scrub_progress
*progress
);
3672 struct reada_control
{
3673 struct btrfs_root
*root
; /* tree to prefetch */
3674 struct btrfs_key key_start
;
3675 struct btrfs_key key_end
; /* exclusive */
3678 wait_queue_head_t wait
;
3680 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3681 struct btrfs_key
*start
, struct btrfs_key
*end
);
3682 int btrfs_reada_wait(void *handle
);
3683 void btrfs_reada_detach(void *handle
);
3684 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3685 u64 start
, int err
);
3688 struct qgroup_update
{
3689 struct list_head list
;
3690 struct btrfs_delayed_ref_node
*node
;
3691 struct btrfs_delayed_extent_op
*extent_op
;
3694 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
3695 struct btrfs_fs_info
*fs_info
);
3696 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
3697 struct btrfs_fs_info
*fs_info
);
3698 int btrfs_quota_rescan(struct btrfs_fs_info
*fs_info
);
3699 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
3700 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3701 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
3702 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3703 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
3704 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3706 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
3707 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
3708 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
3709 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
3710 struct btrfs_qgroup_limit
*limit
);
3711 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
3712 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
3713 struct btrfs_delayed_extent_op
;
3714 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
3715 struct btrfs_delayed_ref_node
*node
,
3716 struct btrfs_delayed_extent_op
*extent_op
);
3717 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
3718 struct btrfs_fs_info
*fs_info
,
3719 struct btrfs_delayed_ref_node
*node
,
3720 struct btrfs_delayed_extent_op
*extent_op
);
3721 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
3722 struct btrfs_fs_info
*fs_info
);
3723 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
3724 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
3725 struct btrfs_qgroup_inherit
*inherit
);
3726 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
3727 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
3729 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
3731 static inline int is_fstree(u64 rootid
)
3733 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3734 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)