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/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include "extent_io.h"
37 #include "extent_map.h"
38 #include "async-thread.h"
40 struct btrfs_trans_handle
;
41 struct btrfs_transaction
;
42 struct btrfs_pending_snapshot
;
43 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
44 extern struct kmem_cache
*btrfs_transaction_cachep
;
45 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
46 extern struct kmem_cache
*btrfs_path_cachep
;
47 extern struct kmem_cache
*btrfs_free_space_cachep
;
48 struct btrfs_ordered_sum
;
50 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
51 #define STATIC noinline
53 #define STATIC static noinline
56 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
58 #define BTRFS_MAX_MIRRORS 3
60 #define BTRFS_MAX_LEVEL 8
62 #define BTRFS_COMPAT_EXTENT_TREE_V0
65 * files bigger than this get some pre-flushing when they are added
66 * to the ordered operations list. That way we limit the total
67 * work done by the commit
69 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
71 /* holds pointers to all of the tree roots */
72 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
74 /* stores information about which extents are in use, and reference counts */
75 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
78 * chunk tree stores translations from logical -> physical block numbering
79 * the super block points to the chunk tree
81 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
84 * stores information about which areas of a given device are in use.
85 * one per device. The tree of tree roots points to the device tree
87 #define BTRFS_DEV_TREE_OBJECTID 4ULL
89 /* one per subvolume, storing files and directories */
90 #define BTRFS_FS_TREE_OBJECTID 5ULL
92 /* directory objectid inside the root tree */
93 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
95 /* holds checksums of all the data extents */
96 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
98 /* holds quota configuration and tracking */
99 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
101 /* for storing items that use the BTRFS_UUID_KEY* types */
102 #define BTRFS_UUID_TREE_OBJECTID 9ULL
104 /* for storing balance parameters in the root tree */
105 #define BTRFS_BALANCE_OBJECTID -4ULL
107 /* orhpan objectid for tracking unlinked/truncated files */
108 #define BTRFS_ORPHAN_OBJECTID -5ULL
110 /* does write ahead logging to speed up fsyncs */
111 #define BTRFS_TREE_LOG_OBJECTID -6ULL
112 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
114 /* for space balancing */
115 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
116 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
119 * extent checksums all have this objectid
120 * this allows them to share the logging tree
123 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
125 /* For storing free space cache */
126 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
129 * The inode number assigned to the special inode for storing
132 #define BTRFS_FREE_INO_OBJECTID -12ULL
134 /* dummy objectid represents multiple objectids */
135 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
138 * All files have objectids in this range.
140 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
141 #define BTRFS_LAST_FREE_OBJECTID -256ULL
142 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
146 * the device items go into the chunk tree. The key is in the form
147 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
149 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
151 #define BTRFS_BTREE_INODE_OBJECTID 1
153 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
155 #define BTRFS_DEV_REPLACE_DEVID 0ULL
158 * the max metadata block size. This limit is somewhat artificial,
159 * but the memmove costs go through the roof for larger blocks.
161 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
164 * we can actually store much bigger names, but lets not confuse the rest
167 #define BTRFS_NAME_LEN 255
170 * Theoretical limit is larger, but we keep this down to a sane
171 * value. That should limit greatly the possibility of collisions on
174 #define BTRFS_LINK_MAX 65535U
176 /* 32 bytes in various csum fields */
177 #define BTRFS_CSUM_SIZE 32
180 #define BTRFS_CSUM_TYPE_CRC32 0
182 static int btrfs_csum_sizes
[] = { 4, 0 };
184 /* four bytes for CRC32 */
185 #define BTRFS_EMPTY_DIR_SIZE 0
187 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
188 #define REQ_GET_READ_MIRRORS (1 << 30)
190 #define BTRFS_FT_UNKNOWN 0
191 #define BTRFS_FT_REG_FILE 1
192 #define BTRFS_FT_DIR 2
193 #define BTRFS_FT_CHRDEV 3
194 #define BTRFS_FT_BLKDEV 4
195 #define BTRFS_FT_FIFO 5
196 #define BTRFS_FT_SOCK 6
197 #define BTRFS_FT_SYMLINK 7
198 #define BTRFS_FT_XATTR 8
199 #define BTRFS_FT_MAX 9
201 /* ioprio of readahead is set to idle */
202 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
204 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
207 * The key defines the order in the tree, and so it also defines (optimal)
210 * objectid corresponds to the inode number.
212 * type tells us things about the object, and is a kind of stream selector.
213 * so for a given inode, keys with type of 1 might refer to the inode data,
214 * type of 2 may point to file data in the btree and type == 3 may point to
217 * offset is the starting byte offset for this key in the stream.
219 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
220 * in cpu native order. Otherwise they are identical and their sizes
221 * should be the same (ie both packed)
223 struct btrfs_disk_key
{
227 } __attribute__ ((__packed__
));
233 } __attribute__ ((__packed__
));
235 struct btrfs_mapping_tree
{
236 struct extent_map_tree map_tree
;
239 struct btrfs_dev_item
{
240 /* the internal btrfs device id */
243 /* size of the device */
249 /* optimal io alignment for this device */
252 /* optimal io width for this device */
255 /* minimal io size for this device */
258 /* type and info about this device */
261 /* expected generation for this device */
265 * starting byte of this partition on the device,
266 * to allow for stripe alignment in the future
270 /* grouping information for allocation decisions */
273 /* seek speed 0-100 where 100 is fastest */
276 /* bandwidth 0-100 where 100 is fastest */
279 /* btrfs generated uuid for this device */
280 u8 uuid
[BTRFS_UUID_SIZE
];
282 /* uuid of FS who owns this device */
283 u8 fsid
[BTRFS_UUID_SIZE
];
284 } __attribute__ ((__packed__
));
286 struct btrfs_stripe
{
289 u8 dev_uuid
[BTRFS_UUID_SIZE
];
290 } __attribute__ ((__packed__
));
293 /* size of this chunk in bytes */
296 /* objectid of the root referencing this chunk */
302 /* optimal io alignment for this chunk */
305 /* optimal io width for this chunk */
308 /* minimal io size for this chunk */
311 /* 2^16 stripes is quite a lot, a second limit is the size of a single
316 /* sub stripes only matter for raid10 */
318 struct btrfs_stripe stripe
;
319 /* additional stripes go here */
320 } __attribute__ ((__packed__
));
322 #define BTRFS_FREE_SPACE_EXTENT 1
323 #define BTRFS_FREE_SPACE_BITMAP 2
325 struct btrfs_free_space_entry
{
329 } __attribute__ ((__packed__
));
331 struct btrfs_free_space_header
{
332 struct btrfs_disk_key location
;
336 } __attribute__ ((__packed__
));
338 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
340 BUG_ON(num_stripes
== 0);
341 return sizeof(struct btrfs_chunk
) +
342 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
345 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
346 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
351 #define BTRFS_FS_STATE_ERROR 0
352 #define BTRFS_FS_STATE_REMOUNTING 1
353 #define BTRFS_FS_STATE_TRANS_ABORTED 2
354 #define BTRFS_FS_STATE_DEV_REPLACING 3
356 /* Super block flags */
357 /* Errors detected */
358 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
360 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
361 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
363 #define BTRFS_BACKREF_REV_MAX 256
364 #define BTRFS_BACKREF_REV_SHIFT 56
365 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
366 BTRFS_BACKREF_REV_SHIFT)
368 #define BTRFS_OLD_BACKREF_REV 0
369 #define BTRFS_MIXED_BACKREF_REV 1
372 * every tree block (leaf or node) starts with this header.
374 struct btrfs_header
{
375 /* these first four must match the super block */
376 u8 csum
[BTRFS_CSUM_SIZE
];
377 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
378 __le64 bytenr
; /* which block this node is supposed to live in */
381 /* allowed to be different from the super from here on down */
382 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
387 } __attribute__ ((__packed__
));
389 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
390 sizeof(struct btrfs_header)) / \
391 sizeof(struct btrfs_key_ptr))
392 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
393 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
394 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
395 sizeof(struct btrfs_item) - \
396 sizeof(struct btrfs_file_extent_item))
397 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
398 sizeof(struct btrfs_item) -\
399 sizeof(struct btrfs_dir_item))
403 * this is a very generous portion of the super block, giving us
404 * room to translate 14 chunks with 3 stripes each.
406 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
407 #define BTRFS_LABEL_SIZE 256
410 * just in case we somehow lose the roots and are not able to mount,
411 * we store an array of the roots from previous transactions
414 #define BTRFS_NUM_BACKUP_ROOTS 4
415 struct btrfs_root_backup
{
417 __le64 tree_root_gen
;
420 __le64 chunk_root_gen
;
423 __le64 extent_root_gen
;
432 __le64 csum_root_gen
;
442 u8 extent_root_level
;
446 /* future and to align */
448 } __attribute__ ((__packed__
));
451 * the super block basically lists the main trees of the FS
452 * it currently lacks any block count etc etc
454 struct btrfs_super_block
{
455 u8 csum
[BTRFS_CSUM_SIZE
];
456 /* the first 4 fields must match struct btrfs_header */
457 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
458 __le64 bytenr
; /* this block number */
461 /* allowed to be different from the btrfs_header from here own down */
468 /* this will help find the new super based on the log root */
469 __le64 log_root_transid
;
472 __le64 root_dir_objectid
;
478 __le32 sys_chunk_array_size
;
479 __le64 chunk_root_generation
;
481 __le64 compat_ro_flags
;
482 __le64 incompat_flags
;
487 struct btrfs_dev_item dev_item
;
489 char label
[BTRFS_LABEL_SIZE
];
491 __le64 cache_generation
;
492 __le64 uuid_tree_generation
;
494 /* future expansion */
496 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
497 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
498 } __attribute__ ((__packed__
));
501 * Compat flags that we support. If any incompat flags are set other than the
502 * ones specified below then we will fail to mount
504 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
505 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
506 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
507 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
509 * some patches floated around with a second compression method
510 * lets save that incompat here for when they do get in
511 * Note we don't actually support it, we're just reserving the
514 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
517 * older kernels tried to do bigger metadata blocks, but the
518 * code was pretty buggy. Lets not let them try anymore.
520 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
522 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
523 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
524 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
525 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
527 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
528 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
529 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
530 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
531 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
532 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
534 #define BTRFS_FEATURE_INCOMPAT_SUPP \
535 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
536 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
537 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
538 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
539 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
540 BTRFS_FEATURE_INCOMPAT_RAID56 | \
541 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
542 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
543 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
545 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
546 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
547 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
550 * A leaf is full of items. offset and size tell us where to find
551 * the item in the leaf (relative to the start of the data area)
554 struct btrfs_disk_key key
;
557 } __attribute__ ((__packed__
));
560 * leaves have an item area and a data area:
561 * [item0, item1....itemN] [free space] [dataN...data1, data0]
563 * The data is separate from the items to get the keys closer together
567 struct btrfs_header header
;
568 struct btrfs_item items
[];
569 } __attribute__ ((__packed__
));
572 * all non-leaf blocks are nodes, they hold only keys and pointers to
575 struct btrfs_key_ptr
{
576 struct btrfs_disk_key key
;
579 } __attribute__ ((__packed__
));
582 struct btrfs_header header
;
583 struct btrfs_key_ptr ptrs
[];
584 } __attribute__ ((__packed__
));
587 * btrfs_paths remember the path taken from the root down to the leaf.
588 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
589 * to any other levels that are present.
591 * The slots array records the index of the item or block pointer
592 * used while walking the tree.
595 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
596 int slots
[BTRFS_MAX_LEVEL
];
597 /* if there is real range locking, this locks field will change */
598 int locks
[BTRFS_MAX_LEVEL
];
600 /* keep some upper locks as we walk down */
604 * set by btrfs_split_item, tells search_slot to keep all locks
605 * and to force calls to keep space in the nodes
607 unsigned int search_for_split
:1;
608 unsigned int keep_locks
:1;
609 unsigned int skip_locking
:1;
610 unsigned int leave_spinning
:1;
611 unsigned int search_commit_root
:1;
615 * items in the extent btree are used to record the objectid of the
616 * owner of the block and the number of references
619 struct btrfs_extent_item
{
623 } __attribute__ ((__packed__
));
625 struct btrfs_extent_item_v0
{
627 } __attribute__ ((__packed__
));
629 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
630 sizeof(struct btrfs_item))
632 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
633 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
635 /* following flags only apply to tree blocks */
637 /* use full backrefs for extent pointers in the block */
638 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
641 * this flag is only used internally by scrub and may be changed at any time
642 * it is only declared here to avoid collisions
644 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
646 struct btrfs_tree_block_info
{
647 struct btrfs_disk_key key
;
649 } __attribute__ ((__packed__
));
651 struct btrfs_extent_data_ref
{
656 } __attribute__ ((__packed__
));
658 struct btrfs_shared_data_ref
{
660 } __attribute__ ((__packed__
));
662 struct btrfs_extent_inline_ref
{
665 } __attribute__ ((__packed__
));
667 /* old style backrefs item */
668 struct btrfs_extent_ref_v0
{
673 } __attribute__ ((__packed__
));
676 /* dev extents record free space on individual devices. The owner
677 * field points back to the chunk allocation mapping tree that allocated
678 * the extent. The chunk tree uuid field is a way to double check the owner
680 struct btrfs_dev_extent
{
682 __le64 chunk_objectid
;
685 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
686 } __attribute__ ((__packed__
));
688 struct btrfs_inode_ref
{
692 } __attribute__ ((__packed__
));
694 struct btrfs_inode_extref
{
695 __le64 parent_objectid
;
700 } __attribute__ ((__packed__
));
702 struct btrfs_timespec
{
705 } __attribute__ ((__packed__
));
707 enum btrfs_compression_type
{
708 BTRFS_COMPRESS_NONE
= 0,
709 BTRFS_COMPRESS_ZLIB
= 1,
710 BTRFS_COMPRESS_LZO
= 2,
711 BTRFS_COMPRESS_TYPES
= 2,
712 BTRFS_COMPRESS_LAST
= 3,
715 struct btrfs_inode_item
{
716 /* nfs style generation number */
718 /* transid that last touched this inode */
730 /* modification sequence number for NFS */
734 * a little future expansion, for more than this we can
735 * just grow the inode item and version it
738 struct btrfs_timespec atime
;
739 struct btrfs_timespec ctime
;
740 struct btrfs_timespec mtime
;
741 struct btrfs_timespec otime
;
742 } __attribute__ ((__packed__
));
744 struct btrfs_dir_log_item
{
746 } __attribute__ ((__packed__
));
748 struct btrfs_dir_item
{
749 struct btrfs_disk_key location
;
754 } __attribute__ ((__packed__
));
756 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
758 struct btrfs_root_item
{
759 struct btrfs_inode_item inode
;
765 __le64 last_snapshot
;
768 struct btrfs_disk_key drop_progress
;
773 * The following fields appear after subvol_uuids+subvol_times
778 * This generation number is used to test if the new fields are valid
779 * and up to date while reading the root item. Everytime the root item
780 * is written out, the "generation" field is copied into this field. If
781 * anyone ever mounted the fs with an older kernel, we will have
782 * mismatching generation values here and thus must invalidate the
783 * new fields. See btrfs_update_root and btrfs_find_last_root for
785 * the offset of generation_v2 is also used as the start for the memset
786 * when invalidating the fields.
788 __le64 generation_v2
;
789 u8 uuid
[BTRFS_UUID_SIZE
];
790 u8 parent_uuid
[BTRFS_UUID_SIZE
];
791 u8 received_uuid
[BTRFS_UUID_SIZE
];
792 __le64 ctransid
; /* updated when an inode changes */
793 __le64 otransid
; /* trans when created */
794 __le64 stransid
; /* trans when sent. non-zero for received subvol */
795 __le64 rtransid
; /* trans when received. non-zero for received subvol */
796 struct btrfs_timespec ctime
;
797 struct btrfs_timespec otime
;
798 struct btrfs_timespec stime
;
799 struct btrfs_timespec rtime
;
800 __le64 reserved
[8]; /* for future */
801 } __attribute__ ((__packed__
));
804 * this is used for both forward and backward root refs
806 struct btrfs_root_ref
{
810 } __attribute__ ((__packed__
));
812 struct btrfs_disk_balance_args
{
814 * profiles to operate on, single is denoted by
815 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
825 /* devid subset filter [pstart..pend) */
829 /* btrfs virtual address space subset filter [vstart..vend) */
834 * profile to convert to, single is denoted by
835 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
839 /* BTRFS_BALANCE_ARGS_* */
843 } __attribute__ ((__packed__
));
846 * store balance parameters to disk so that balance can be properly
847 * resumed after crash or unmount
849 struct btrfs_balance_item
{
850 /* BTRFS_BALANCE_* */
853 struct btrfs_disk_balance_args data
;
854 struct btrfs_disk_balance_args meta
;
855 struct btrfs_disk_balance_args sys
;
858 } __attribute__ ((__packed__
));
860 #define BTRFS_FILE_EXTENT_INLINE 0
861 #define BTRFS_FILE_EXTENT_REG 1
862 #define BTRFS_FILE_EXTENT_PREALLOC 2
864 struct btrfs_file_extent_item
{
866 * transaction id that created this extent
870 * max number of bytes to hold this extent in ram
871 * when we split a compressed extent we can't know how big
872 * each of the resulting pieces will be. So, this is
873 * an upper limit on the size of the extent in ram instead of
879 * 32 bits for the various ways we might encode the data,
880 * including compression and encryption. If any of these
881 * are set to something a given disk format doesn't understand
882 * it is treated like an incompat flag for reading and writing,
887 __le16 other_encoding
; /* spare for later use */
889 /* are we inline data or a real extent? */
893 * disk space consumed by the extent, checksum blocks are included
897 __le64 disk_num_bytes
;
899 * the logical offset in file blocks (no csums)
900 * this extent record is for. This allows a file extent to point
901 * into the middle of an existing extent on disk, sharing it
902 * between two snapshots (useful if some bytes in the middle of the
903 * extent have changed
907 * the logical number of file blocks (no csums included). This
908 * always reflects the size uncompressed and without encoding.
912 } __attribute__ ((__packed__
));
914 struct btrfs_csum_item
{
916 } __attribute__ ((__packed__
));
918 struct btrfs_dev_stats_item
{
920 * grow this item struct at the end for future enhancements and keep
921 * the existing values unchanged
923 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
924 } __attribute__ ((__packed__
));
926 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
927 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
928 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
929 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
930 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
931 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
932 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
934 struct btrfs_dev_replace
{
935 u64 replace_state
; /* see #define above */
936 u64 time_started
; /* seconds since 1-Jan-1970 */
937 u64 time_stopped
; /* seconds since 1-Jan-1970 */
938 atomic64_t num_write_errors
;
939 atomic64_t num_uncorrectable_read_errors
;
942 u64 committed_cursor_left
;
943 u64 cursor_left_last_write_of_item
;
946 u64 cont_reading_from_srcdev_mode
; /* see #define above */
949 int item_needs_writeback
;
950 struct btrfs_device
*srcdev
;
951 struct btrfs_device
*tgtdev
;
954 atomic_t nesting_level
;
955 struct mutex lock_finishing_cancel_unmount
;
956 struct mutex lock_management_lock
;
959 struct btrfs_scrub_progress scrub_progress
;
962 struct btrfs_dev_replace_item
{
964 * grow this item struct at the end for future enhancements and keep
965 * the existing values unchanged
970 __le64 cont_reading_from_srcdev_mode
;
972 __le64 replace_state
;
975 __le64 num_write_errors
;
976 __le64 num_uncorrectable_read_errors
;
977 } __attribute__ ((__packed__
));
979 /* different types of block groups (and chunks) */
980 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
981 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
982 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
983 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
984 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
985 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
986 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
987 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
988 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
989 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
991 enum btrfs_raid_types
{
1002 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1003 BTRFS_BLOCK_GROUP_SYSTEM | \
1004 BTRFS_BLOCK_GROUP_METADATA)
1006 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1007 BTRFS_BLOCK_GROUP_RAID1 | \
1008 BTRFS_BLOCK_GROUP_RAID5 | \
1009 BTRFS_BLOCK_GROUP_RAID6 | \
1010 BTRFS_BLOCK_GROUP_DUP | \
1011 BTRFS_BLOCK_GROUP_RAID10)
1013 * We need a bit for restriper to be able to tell when chunks of type
1014 * SINGLE are available. This "extended" profile format is used in
1015 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1016 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1017 * to avoid remappings between two formats in future.
1019 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1021 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1022 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1024 static inline u64
chunk_to_extended(u64 flags
)
1026 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1027 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1031 static inline u64
extended_to_chunk(u64 flags
)
1033 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1036 struct btrfs_block_group_item
{
1038 __le64 chunk_objectid
;
1040 } __attribute__ ((__packed__
));
1043 * is subvolume quota turned on?
1045 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1047 * RESCAN is set during the initialization phase
1049 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1051 * Some qgroup entries are known to be out of date,
1052 * either because the configuration has changed in a way that
1053 * makes a rescan necessary, or because the fs has been mounted
1054 * with a non-qgroup-aware version.
1055 * Turning qouta off and on again makes it inconsistent, too.
1057 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1059 #define BTRFS_QGROUP_STATUS_VERSION 1
1061 struct btrfs_qgroup_status_item
{
1064 * the generation is updated during every commit. As older
1065 * versions of btrfs are not aware of qgroups, it will be
1066 * possible to detect inconsistencies by checking the
1067 * generation on mount time
1071 /* flag definitions see above */
1075 * only used during scanning to record the progress
1076 * of the scan. It contains a logical address
1079 } __attribute__ ((__packed__
));
1081 struct btrfs_qgroup_info_item
{
1087 } __attribute__ ((__packed__
));
1089 /* flags definition for qgroup limits */
1090 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1091 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1092 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1093 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1094 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1095 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1097 struct btrfs_qgroup_limit_item
{
1099 * only updated when any of the other values change
1106 } __attribute__ ((__packed__
));
1108 struct btrfs_space_info
{
1111 u64 total_bytes
; /* total bytes in the space,
1112 this doesn't take mirrors into account */
1113 u64 bytes_used
; /* total bytes used,
1114 this doesn't take mirrors into account */
1115 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1116 transaction finishes */
1117 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1118 current allocations */
1119 u64 bytes_may_use
; /* number of bytes that may be used for
1120 delalloc/allocations */
1121 u64 bytes_readonly
; /* total bytes that are read only */
1123 unsigned int full
:1; /* indicates that we cannot allocate any more
1124 chunks for this space */
1125 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1127 unsigned int flush
:1; /* set if we are trying to make space */
1129 unsigned int force_alloc
; /* set if we need to force a chunk
1130 alloc for this space */
1132 u64 disk_used
; /* total bytes used on disk */
1133 u64 disk_total
; /* total bytes on disk, takes mirrors into
1139 * bytes_pinned is kept in line with what is actually pinned, as in
1140 * we've called update_block_group and dropped the bytes_used counter
1141 * and increased the bytes_pinned counter. However this means that
1142 * bytes_pinned does not reflect the bytes that will be pinned once the
1143 * delayed refs are flushed, so this counter is inc'ed everytime we call
1144 * btrfs_free_extent so it is a realtime count of what will be freed
1145 * once the transaction is committed. It will be zero'ed everytime the
1146 * transaction commits.
1148 struct percpu_counter total_bytes_pinned
;
1150 struct list_head list
;
1152 struct rw_semaphore groups_sem
;
1153 /* for block groups in our same type */
1154 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1155 wait_queue_head_t wait
;
1157 struct kobject kobj
;
1158 struct kobject block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
1161 #define BTRFS_BLOCK_RSV_GLOBAL 1
1162 #define BTRFS_BLOCK_RSV_DELALLOC 2
1163 #define BTRFS_BLOCK_RSV_TRANS 3
1164 #define BTRFS_BLOCK_RSV_CHUNK 4
1165 #define BTRFS_BLOCK_RSV_DELOPS 5
1166 #define BTRFS_BLOCK_RSV_EMPTY 6
1167 #define BTRFS_BLOCK_RSV_TEMP 7
1169 struct btrfs_block_rsv
{
1172 struct btrfs_space_info
*space_info
;
1174 unsigned short full
;
1175 unsigned short type
;
1176 unsigned short failfast
;
1180 * free clusters are used to claim free space in relatively large chunks,
1181 * allowing us to do less seeky writes. They are used for all metadata
1182 * allocations and data allocations in ssd mode.
1184 struct btrfs_free_cluster
{
1186 spinlock_t refill_lock
;
1187 struct rb_root root
;
1189 /* largest extent in this cluster */
1192 /* first extent starting offset */
1195 struct btrfs_block_group_cache
*block_group
;
1197 * when a cluster is allocated from a block group, we put the
1198 * cluster onto a list in the block group so that it can
1199 * be freed before the block group is freed.
1201 struct list_head block_group_list
;
1204 enum btrfs_caching_type
{
1206 BTRFS_CACHE_STARTED
= 1,
1207 BTRFS_CACHE_FAST
= 2,
1208 BTRFS_CACHE_FINISHED
= 3,
1209 BTRFS_CACHE_ERROR
= 4,
1212 enum btrfs_disk_cache_state
{
1213 BTRFS_DC_WRITTEN
= 0,
1217 BTRFS_DC_NEED_WRITE
= 4,
1220 struct btrfs_caching_control
{
1221 struct list_head list
;
1223 wait_queue_head_t wait
;
1224 struct btrfs_work work
;
1225 struct btrfs_block_group_cache
*block_group
;
1230 struct btrfs_block_group_cache
{
1231 struct btrfs_key key
;
1232 struct btrfs_block_group_item item
;
1233 struct btrfs_fs_info
*fs_info
;
1234 struct inode
*inode
;
1241 u64 cache_generation
;
1243 /* for raid56, this is a full stripe, without parity */
1244 unsigned long full_stripe_len
;
1247 unsigned int dirty
:1;
1248 unsigned int iref
:1;
1250 int disk_cache_state
;
1252 /* cache tracking stuff */
1254 struct btrfs_caching_control
*caching_ctl
;
1255 u64 last_byte_to_unpin
;
1257 struct btrfs_space_info
*space_info
;
1259 /* free space cache stuff */
1260 struct btrfs_free_space_ctl
*free_space_ctl
;
1262 /* block group cache stuff */
1263 struct rb_node cache_node
;
1265 /* for block groups in the same raid type */
1266 struct list_head list
;
1271 /* List of struct btrfs_free_clusters for this block group.
1272 * Today it will only have one thing on it, but that may change
1274 struct list_head cluster_list
;
1276 /* For delayed block group creation */
1277 struct list_head new_bg_list
;
1280 /* delayed seq elem */
1282 struct list_head list
;
1286 enum btrfs_orphan_cleanup_state
{
1287 ORPHAN_CLEANUP_STARTED
= 1,
1288 ORPHAN_CLEANUP_DONE
= 2,
1291 /* used by the raid56 code to lock stripes for read/modify/write */
1292 struct btrfs_stripe_hash
{
1293 struct list_head hash_list
;
1294 wait_queue_head_t wait
;
1298 /* used by the raid56 code to lock stripes for read/modify/write */
1299 struct btrfs_stripe_hash_table
{
1300 struct list_head stripe_cache
;
1301 spinlock_t cache_lock
;
1303 struct btrfs_stripe_hash table
[];
1306 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1309 struct reloc_control
;
1310 struct btrfs_device
;
1311 struct btrfs_fs_devices
;
1312 struct btrfs_balance_control
;
1313 struct btrfs_delayed_root
;
1314 struct btrfs_fs_info
{
1315 u8 fsid
[BTRFS_FSID_SIZE
];
1316 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1317 struct btrfs_root
*extent_root
;
1318 struct btrfs_root
*tree_root
;
1319 struct btrfs_root
*chunk_root
;
1320 struct btrfs_root
*dev_root
;
1321 struct btrfs_root
*fs_root
;
1322 struct btrfs_root
*csum_root
;
1323 struct btrfs_root
*quota_root
;
1324 struct btrfs_root
*uuid_root
;
1326 /* the log root tree is a directory of all the other log roots */
1327 struct btrfs_root
*log_root_tree
;
1329 spinlock_t fs_roots_radix_lock
;
1330 struct radix_tree_root fs_roots_radix
;
1332 /* block group cache stuff */
1333 spinlock_t block_group_cache_lock
;
1334 u64 first_logical_byte
;
1335 struct rb_root block_group_cache_tree
;
1337 /* keep track of unallocated space */
1338 spinlock_t free_chunk_lock
;
1339 u64 free_chunk_space
;
1341 struct extent_io_tree freed_extents
[2];
1342 struct extent_io_tree
*pinned_extents
;
1344 /* logical->physical extent mapping */
1345 struct btrfs_mapping_tree mapping_tree
;
1348 * block reservation for extent, checksum, root tree and
1349 * delayed dir index item
1351 struct btrfs_block_rsv global_block_rsv
;
1352 /* block reservation for delay allocation */
1353 struct btrfs_block_rsv delalloc_block_rsv
;
1354 /* block reservation for metadata operations */
1355 struct btrfs_block_rsv trans_block_rsv
;
1356 /* block reservation for chunk tree */
1357 struct btrfs_block_rsv chunk_block_rsv
;
1358 /* block reservation for delayed operations */
1359 struct btrfs_block_rsv delayed_block_rsv
;
1361 struct btrfs_block_rsv empty_block_rsv
;
1364 u64 last_trans_committed
;
1365 u64 avg_delayed_ref_runtime
;
1368 * this is updated to the current trans every time a full commit
1369 * is required instead of the faster short fsync log commits
1371 u64 last_trans_log_full_commit
;
1372 unsigned long mount_opt
;
1373 unsigned long compress_type
:4;
1374 int commit_interval
;
1376 * It is a suggestive number, the read side is safe even it gets a
1377 * wrong number because we will write out the data into a regular
1378 * extent. The write side(mount/remount) is under ->s_umount lock,
1379 * so it is also safe.
1383 * Protected by ->chunk_mutex and sb->s_umount.
1385 * The reason that we use two lock to protect it is because only
1386 * remount and mount operations can change it and these two operations
1387 * are under sb->s_umount, but the read side (chunk allocation) can not
1388 * acquire sb->s_umount or the deadlock would happen. So we use two
1389 * locks to protect it. On the write side, we must acquire two locks,
1390 * and on the read side, we just need acquire one of them.
1393 struct btrfs_transaction
*running_transaction
;
1394 wait_queue_head_t transaction_throttle
;
1395 wait_queue_head_t transaction_wait
;
1396 wait_queue_head_t transaction_blocked_wait
;
1397 wait_queue_head_t async_submit_wait
;
1400 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1401 * when they are updated.
1403 * Because we do not clear the flags for ever, so we needn't use
1404 * the lock on the read side.
1406 * We also needn't use the lock when we mount the fs, because
1407 * there is no other task which will update the flag.
1409 spinlock_t super_lock
;
1410 struct btrfs_super_block
*super_copy
;
1411 struct btrfs_super_block
*super_for_commit
;
1412 struct block_device
*__bdev
;
1413 struct super_block
*sb
;
1414 struct inode
*btree_inode
;
1415 struct backing_dev_info bdi
;
1416 struct mutex tree_log_mutex
;
1417 struct mutex transaction_kthread_mutex
;
1418 struct mutex cleaner_mutex
;
1419 struct mutex chunk_mutex
;
1420 struct mutex volume_mutex
;
1422 /* this is used during read/modify/write to make sure
1423 * no two ios are trying to mod the same stripe at the same
1426 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1429 * this protects the ordered operations list only while we are
1430 * processing all of the entries on it. This way we make
1431 * sure the commit code doesn't find the list temporarily empty
1432 * because another function happens to be doing non-waiting preflush
1433 * before jumping into the main commit.
1435 struct mutex ordered_operations_mutex
;
1438 * Same as ordered_operations_mutex except this is for ordered extents
1439 * and not the operations.
1441 struct mutex ordered_extent_flush_mutex
;
1443 struct rw_semaphore extent_commit_sem
;
1445 struct rw_semaphore cleanup_work_sem
;
1447 struct rw_semaphore subvol_sem
;
1448 struct srcu_struct subvol_srcu
;
1450 spinlock_t trans_lock
;
1452 * the reloc mutex goes with the trans lock, it is taken
1453 * during commit to protect us from the relocation code
1455 struct mutex reloc_mutex
;
1457 struct list_head trans_list
;
1458 struct list_head dead_roots
;
1459 struct list_head caching_block_groups
;
1461 spinlock_t delayed_iput_lock
;
1462 struct list_head delayed_iputs
;
1464 /* this protects tree_mod_seq_list */
1465 spinlock_t tree_mod_seq_lock
;
1466 atomic64_t tree_mod_seq
;
1467 struct list_head tree_mod_seq_list
;
1469 /* this protects tree_mod_log */
1470 rwlock_t tree_mod_log_lock
;
1471 struct rb_root tree_mod_log
;
1473 atomic_t nr_async_submits
;
1474 atomic_t async_submit_draining
;
1475 atomic_t nr_async_bios
;
1476 atomic_t async_delalloc_pages
;
1477 atomic_t open_ioctl_trans
;
1480 * this is used to protect the following list -- ordered_roots.
1482 spinlock_t ordered_root_lock
;
1485 * all fs/file tree roots in which there are data=ordered extents
1486 * pending writeback are added into this list.
1488 * these can span multiple transactions and basically include
1489 * every dirty data page that isn't from nodatacow
1491 struct list_head ordered_roots
;
1493 spinlock_t delalloc_root_lock
;
1494 /* all fs/file tree roots that have delalloc inodes. */
1495 struct list_head delalloc_roots
;
1498 * there is a pool of worker threads for checksumming during writes
1499 * and a pool for checksumming after reads. This is because readers
1500 * can run with FS locks held, and the writers may be waiting for
1501 * those locks. We don't want ordering in the pending list to cause
1502 * deadlocks, and so the two are serviced separately.
1504 * A third pool does submit_bio to avoid deadlocking with the other
1507 struct btrfs_workers generic_worker
;
1508 struct btrfs_workqueue_struct
*workers
;
1509 struct btrfs_workqueue_struct
*delalloc_workers
;
1510 struct btrfs_workers flush_workers
;
1511 struct btrfs_workers endio_workers
;
1512 struct btrfs_workers endio_meta_workers
;
1513 struct btrfs_workers endio_raid56_workers
;
1514 struct btrfs_workers rmw_workers
;
1515 struct btrfs_workers endio_meta_write_workers
;
1516 struct btrfs_workers endio_write_workers
;
1517 struct btrfs_workers endio_freespace_worker
;
1518 struct btrfs_workers submit_workers
;
1519 struct btrfs_workers caching_workers
;
1520 struct btrfs_workers readahead_workers
;
1523 * fixup workers take dirty pages that didn't properly go through
1524 * the cow mechanism and make them safe to write. It happens
1525 * for the sys_munmap function call path
1527 struct btrfs_workers fixup_workers
;
1528 struct btrfs_workers delayed_workers
;
1529 struct task_struct
*transaction_kthread
;
1530 struct task_struct
*cleaner_kthread
;
1531 int thread_pool_size
;
1533 struct kobject super_kobj
;
1534 struct kobject
*space_info_kobj
;
1535 struct kobject
*device_dir_kobj
;
1536 struct completion kobj_unregister
;
1539 int log_root_recovering
;
1543 /* used to keep from writing metadata until there is a nice batch */
1544 struct percpu_counter dirty_metadata_bytes
;
1545 struct percpu_counter delalloc_bytes
;
1546 s32 dirty_metadata_batch
;
1549 struct list_head dirty_cowonly_roots
;
1551 struct btrfs_fs_devices
*fs_devices
;
1554 * the space_info list is almost entirely read only. It only changes
1555 * when we add a new raid type to the FS, and that happens
1556 * very rarely. RCU is used to protect it.
1558 struct list_head space_info
;
1560 struct btrfs_space_info
*data_sinfo
;
1562 struct reloc_control
*reloc_ctl
;
1564 /* data_alloc_cluster is only used in ssd mode */
1565 struct btrfs_free_cluster data_alloc_cluster
;
1567 /* all metadata allocations go through this cluster */
1568 struct btrfs_free_cluster meta_alloc_cluster
;
1570 /* auto defrag inodes go here */
1571 spinlock_t defrag_inodes_lock
;
1572 struct rb_root defrag_inodes
;
1573 atomic_t defrag_running
;
1575 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1576 seqlock_t profiles_lock
;
1578 * these three are in extended format (availability of single
1579 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1580 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1582 u64 avail_data_alloc_bits
;
1583 u64 avail_metadata_alloc_bits
;
1584 u64 avail_system_alloc_bits
;
1586 /* restriper state */
1587 spinlock_t balance_lock
;
1588 struct mutex balance_mutex
;
1589 atomic_t balance_running
;
1590 atomic_t balance_pause_req
;
1591 atomic_t balance_cancel_req
;
1592 struct btrfs_balance_control
*balance_ctl
;
1593 wait_queue_head_t balance_wait_q
;
1595 unsigned data_chunk_allocations
;
1596 unsigned metadata_ratio
;
1600 /* private scrub information */
1601 struct mutex scrub_lock
;
1602 atomic_t scrubs_running
;
1603 atomic_t scrub_pause_req
;
1604 atomic_t scrubs_paused
;
1605 atomic_t scrub_cancel_req
;
1606 wait_queue_head_t scrub_pause_wait
;
1607 int scrub_workers_refcnt
;
1608 struct btrfs_workers scrub_workers
;
1609 struct btrfs_workers scrub_wr_completion_workers
;
1610 struct btrfs_workers scrub_nocow_workers
;
1612 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1613 u32 check_integrity_print_mask
;
1618 unsigned int quota_enabled
:1;
1621 * quota_enabled only changes state after a commit. This holds the
1624 unsigned int pending_quota_state
:1;
1626 /* is qgroup tracking in a consistent state? */
1629 /* holds configuration and tracking. Protected by qgroup_lock */
1630 struct rb_root qgroup_tree
;
1631 spinlock_t qgroup_lock
;
1634 * used to avoid frequently calling ulist_alloc()/ulist_free()
1635 * when doing qgroup accounting, it must be protected by qgroup_lock.
1637 struct ulist
*qgroup_ulist
;
1639 /* protect user change for quota operations */
1640 struct mutex qgroup_ioctl_lock
;
1642 /* list of dirty qgroups to be written at next commit */
1643 struct list_head dirty_qgroups
;
1645 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1648 /* qgroup rescan items */
1649 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1650 struct btrfs_key qgroup_rescan_progress
;
1651 struct btrfs_workers qgroup_rescan_workers
;
1652 struct completion qgroup_rescan_completion
;
1653 struct btrfs_work qgroup_rescan_work
;
1655 /* filesystem state */
1656 unsigned long fs_state
;
1658 struct btrfs_delayed_root
*delayed_root
;
1660 /* readahead tree */
1661 spinlock_t reada_lock
;
1662 struct radix_tree_root reada_tree
;
1664 /* Extent buffer radix tree */
1665 spinlock_t buffer_lock
;
1666 struct radix_tree_root buffer_radix
;
1668 /* next backup root to be overwritten */
1669 int backup_root_index
;
1671 int num_tolerated_disk_barrier_failures
;
1673 /* device replace state */
1674 struct btrfs_dev_replace dev_replace
;
1676 atomic_t mutually_exclusive_operation_running
;
1678 struct percpu_counter bio_counter
;
1679 wait_queue_head_t replace_wait
;
1681 struct semaphore uuid_tree_rescan_sem
;
1682 unsigned int update_uuid_tree_gen
:1;
1686 * in ram representation of the tree. extent_root is used for all allocations
1687 * and for the extent tree extent_root root.
1690 struct extent_buffer
*node
;
1692 struct extent_buffer
*commit_root
;
1693 struct btrfs_root
*log_root
;
1694 struct btrfs_root
*reloc_root
;
1696 struct btrfs_root_item root_item
;
1697 struct btrfs_key root_key
;
1698 struct btrfs_fs_info
*fs_info
;
1699 struct extent_io_tree dirty_log_pages
;
1701 struct kobject root_kobj
;
1702 struct completion kobj_unregister
;
1703 struct mutex objectid_mutex
;
1705 spinlock_t accounting_lock
;
1706 struct btrfs_block_rsv
*block_rsv
;
1708 /* free ino cache stuff */
1709 struct mutex fs_commit_mutex
;
1710 struct btrfs_free_space_ctl
*free_ino_ctl
;
1711 enum btrfs_caching_type cached
;
1712 spinlock_t cache_lock
;
1713 wait_queue_head_t cache_wait
;
1714 struct btrfs_free_space_ctl
*free_ino_pinned
;
1716 struct inode
*cache_inode
;
1718 struct mutex log_mutex
;
1719 wait_queue_head_t log_writer_wait
;
1720 wait_queue_head_t log_commit_wait
[2];
1721 struct list_head log_ctxs
[2];
1722 atomic_t log_writers
;
1723 atomic_t log_commit
[2];
1726 /* No matter the commit succeeds or not*/
1727 int log_transid_committed
;
1728 /* Just be updated when the commit succeeds. */
1729 int last_log_commit
;
1730 pid_t log_start_pid
;
1731 bool log_multiple_pids
;
1736 /* data allocations are done in sectorsize units */
1739 /* node allocations are done in nodesize units */
1742 /* leaf allocations are done in leafsize units */
1749 u64 highest_objectid
;
1751 /* btrfs_record_root_in_trans is a multi-step process,
1752 * and it can race with the balancing code. But the
1753 * race is very small, and only the first time the root
1754 * is added to each transaction. So in_trans_setup
1755 * is used to tell us when more checks are required
1757 unsigned long in_trans_setup
;
1761 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1764 u64 defrag_trans_start
;
1765 struct btrfs_key defrag_progress
;
1766 struct btrfs_key defrag_max
;
1770 /* the dirty list is only used by non-reference counted roots */
1771 struct list_head dirty_list
;
1773 struct list_head root_list
;
1775 spinlock_t log_extents_lock
[2];
1776 struct list_head logged_list
[2];
1778 spinlock_t orphan_lock
;
1779 atomic_t orphan_inodes
;
1780 struct btrfs_block_rsv
*orphan_block_rsv
;
1781 int orphan_item_inserted
;
1782 int orphan_cleanup_state
;
1784 spinlock_t inode_lock
;
1785 /* red-black tree that keeps track of in-memory inodes */
1786 struct rb_root inode_tree
;
1789 * radix tree that keeps track of delayed nodes of every inode,
1790 * protected by inode_lock
1792 struct radix_tree_root delayed_nodes_tree
;
1794 * right now this just gets used so that a root has its own devid
1795 * for stat. It may be used for more later
1801 spinlock_t root_item_lock
;
1804 spinlock_t delalloc_lock
;
1806 * all of the inodes that have delalloc bytes. It is possible for
1807 * this list to be empty even when there is still dirty data=ordered
1808 * extents waiting to finish IO.
1810 struct list_head delalloc_inodes
;
1811 struct list_head delalloc_root
;
1812 u64 nr_delalloc_inodes
;
1814 * this is used by the balancing code to wait for all the pending
1817 spinlock_t ordered_extent_lock
;
1820 * all of the data=ordered extents pending writeback
1821 * these can span multiple transactions and basically include
1822 * every dirty data page that isn't from nodatacow
1824 struct list_head ordered_extents
;
1825 struct list_head ordered_root
;
1826 u64 nr_ordered_extents
;
1829 * Number of currently running SEND ioctls to prevent
1830 * manipulation with the read-only status via SUBVOL_SETFLAGS
1832 int send_in_progress
;
1835 struct btrfs_ioctl_defrag_range_args
{
1836 /* start of the defrag operation */
1839 /* number of bytes to defrag, use (u64)-1 to say all */
1843 * flags for the operation, which can include turning
1844 * on compression for this one defrag
1849 * any extent bigger than this will be considered
1850 * already defragged. Use 0 to take the kernel default
1851 * Use 1 to say every single extent must be rewritten
1853 __u32 extent_thresh
;
1856 * which compression method to use if turning on compression
1857 * for this defrag operation. If unspecified, zlib will
1860 __u32 compress_type
;
1862 /* spare for later */
1868 * inode items have the data typically returned from stat and store other
1869 * info about object characteristics. There is one for every file and dir in
1872 #define BTRFS_INODE_ITEM_KEY 1
1873 #define BTRFS_INODE_REF_KEY 12
1874 #define BTRFS_INODE_EXTREF_KEY 13
1875 #define BTRFS_XATTR_ITEM_KEY 24
1876 #define BTRFS_ORPHAN_ITEM_KEY 48
1877 /* reserve 2-15 close to the inode for later flexibility */
1880 * dir items are the name -> inode pointers in a directory. There is one
1881 * for every name in a directory.
1883 #define BTRFS_DIR_LOG_ITEM_KEY 60
1884 #define BTRFS_DIR_LOG_INDEX_KEY 72
1885 #define BTRFS_DIR_ITEM_KEY 84
1886 #define BTRFS_DIR_INDEX_KEY 96
1888 * extent data is for file data
1890 #define BTRFS_EXTENT_DATA_KEY 108
1893 * extent csums are stored in a separate tree and hold csums for
1894 * an entire extent on disk.
1896 #define BTRFS_EXTENT_CSUM_KEY 128
1899 * root items point to tree roots. They are typically in the root
1900 * tree used by the super block to find all the other trees
1902 #define BTRFS_ROOT_ITEM_KEY 132
1905 * root backrefs tie subvols and snapshots to the directory entries that
1908 #define BTRFS_ROOT_BACKREF_KEY 144
1911 * root refs make a fast index for listing all of the snapshots and
1912 * subvolumes referenced by a given root. They point directly to the
1913 * directory item in the root that references the subvol
1915 #define BTRFS_ROOT_REF_KEY 156
1918 * extent items are in the extent map tree. These record which blocks
1919 * are used, and how many references there are to each block
1921 #define BTRFS_EXTENT_ITEM_KEY 168
1924 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1925 * the length, so we save the level in key->offset instead of the length.
1927 #define BTRFS_METADATA_ITEM_KEY 169
1929 #define BTRFS_TREE_BLOCK_REF_KEY 176
1931 #define BTRFS_EXTENT_DATA_REF_KEY 178
1933 #define BTRFS_EXTENT_REF_V0_KEY 180
1935 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1937 #define BTRFS_SHARED_DATA_REF_KEY 184
1940 * block groups give us hints into the extent allocation trees. Which
1941 * blocks are free etc etc
1943 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1945 #define BTRFS_DEV_EXTENT_KEY 204
1946 #define BTRFS_DEV_ITEM_KEY 216
1947 #define BTRFS_CHUNK_ITEM_KEY 228
1950 * Records the overall state of the qgroups.
1951 * There's only one instance of this key present,
1952 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1954 #define BTRFS_QGROUP_STATUS_KEY 240
1956 * Records the currently used space of the qgroup.
1957 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1959 #define BTRFS_QGROUP_INFO_KEY 242
1961 * Contains the user configured limits for the qgroup.
1962 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1964 #define BTRFS_QGROUP_LIMIT_KEY 244
1966 * Records the child-parent relationship of qgroups. For
1967 * each relation, 2 keys are present:
1968 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1969 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1971 #define BTRFS_QGROUP_RELATION_KEY 246
1973 #define BTRFS_BALANCE_ITEM_KEY 248
1976 * Persistantly stores the io stats in the device tree.
1977 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1979 #define BTRFS_DEV_STATS_KEY 249
1982 * Persistantly stores the device replace state in the device tree.
1983 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1985 #define BTRFS_DEV_REPLACE_KEY 250
1988 * Stores items that allow to quickly map UUIDs to something else.
1989 * These items are part of the filesystem UUID tree.
1990 * The key is built like this:
1991 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1993 #if BTRFS_UUID_SIZE != 16
1994 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1996 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1997 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1998 * received subvols */
2001 * string items are for debugging. They just store a short string of
2004 #define BTRFS_STRING_ITEM_KEY 253
2007 * Flags for mount options.
2009 * Note: don't forget to add new options to btrfs_show_options()
2011 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2012 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2013 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2014 #define BTRFS_MOUNT_SSD (1 << 3)
2015 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2016 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2017 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2018 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2019 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2020 #define BTRFS_MOUNT_NOSSD (1 << 9)
2021 #define BTRFS_MOUNT_DISCARD (1 << 10)
2022 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2023 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2024 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2025 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2026 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2027 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2028 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2029 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2030 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2031 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2032 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2033 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2034 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2035 #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2037 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2039 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2040 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2041 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2042 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2047 #define BTRFS_INODE_NODATASUM (1 << 0)
2048 #define BTRFS_INODE_NODATACOW (1 << 1)
2049 #define BTRFS_INODE_READONLY (1 << 2)
2050 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2051 #define BTRFS_INODE_PREALLOC (1 << 4)
2052 #define BTRFS_INODE_SYNC (1 << 5)
2053 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2054 #define BTRFS_INODE_APPEND (1 << 7)
2055 #define BTRFS_INODE_NODUMP (1 << 8)
2056 #define BTRFS_INODE_NOATIME (1 << 9)
2057 #define BTRFS_INODE_DIRSYNC (1 << 10)
2058 #define BTRFS_INODE_COMPRESS (1 << 11)
2060 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2062 struct btrfs_map_token
{
2063 struct extent_buffer
*eb
;
2065 unsigned long offset
;
2068 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
2070 token
->kaddr
= NULL
;
2073 /* some macros to generate set/get funcs for the struct fields. This
2074 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2077 #define le8_to_cpu(v) (v)
2078 #define cpu_to_le8(v) (v)
2081 #define read_eb_member(eb, ptr, type, member, result) ( \
2082 read_extent_buffer(eb, (char *)(result), \
2083 ((unsigned long)(ptr)) + \
2084 offsetof(type, member), \
2085 sizeof(((type *)0)->member)))
2087 #define write_eb_member(eb, ptr, type, member, result) ( \
2088 write_extent_buffer(eb, (char *)(result), \
2089 ((unsigned long)(ptr)) + \
2090 offsetof(type, member), \
2091 sizeof(((type *)0)->member)))
2093 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2094 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2095 unsigned long off, \
2096 struct btrfs_map_token *token); \
2097 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2098 unsigned long off, u##bits val, \
2099 struct btrfs_map_token *token); \
2100 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2101 unsigned long off) \
2103 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2105 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2106 unsigned long off, u##bits val) \
2108 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2111 DECLARE_BTRFS_SETGET_BITS(8)
2112 DECLARE_BTRFS_SETGET_BITS(16)
2113 DECLARE_BTRFS_SETGET_BITS(32)
2114 DECLARE_BTRFS_SETGET_BITS(64)
2116 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2117 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2119 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2120 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2122 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2125 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2126 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2128 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2129 struct btrfs_map_token *token) \
2131 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2132 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2134 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2135 type *s, u##bits val, \
2136 struct btrfs_map_token *token) \
2138 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2139 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2142 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2143 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2145 type *p = page_address(eb->pages[0]); \
2146 u##bits res = le##bits##_to_cpu(p->member); \
2149 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2152 type *p = page_address(eb->pages[0]); \
2153 p->member = cpu_to_le##bits(val); \
2156 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2157 static inline u##bits btrfs_##name(type *s) \
2159 return le##bits##_to_cpu(s->member); \
2161 static inline void btrfs_set_##name(type *s, u##bits val) \
2163 s->member = cpu_to_le##bits(val); \
2166 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2167 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2168 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2169 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2170 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2171 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2173 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2174 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2175 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2176 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2177 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2178 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2180 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2181 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2183 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2185 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2187 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2189 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2191 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2192 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2194 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2196 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2198 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2201 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
2203 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2206 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
2208 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2211 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2212 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2213 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2214 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2215 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2216 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2217 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2218 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2219 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2220 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2221 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2223 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2225 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2228 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2229 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2230 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2232 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2234 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2236 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2238 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2239 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2241 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2243 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2244 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2246 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2249 unsigned long offset
= (unsigned long)c
;
2250 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2251 offset
+= nr
* sizeof(struct btrfs_stripe
);
2252 return (struct btrfs_stripe
*)offset
;
2255 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2257 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2260 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2261 struct btrfs_chunk
*c
, int nr
)
2263 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2266 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2267 struct btrfs_chunk
*c
, int nr
)
2269 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2272 /* struct btrfs_block_group_item */
2273 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2275 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2277 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2278 struct btrfs_block_group_item
, chunk_objectid
, 64);
2280 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2281 struct btrfs_block_group_item
, chunk_objectid
, 64);
2282 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2283 struct btrfs_block_group_item
, flags
, 64);
2284 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2285 struct btrfs_block_group_item
, flags
, 64);
2287 /* struct btrfs_inode_ref */
2288 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2289 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2291 /* struct btrfs_inode_extref */
2292 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2293 parent_objectid
, 64);
2294 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2296 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2298 /* struct btrfs_inode_item */
2299 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2300 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2301 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2302 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2303 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2304 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2305 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2306 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2307 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2308 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2309 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2310 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2311 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
2313 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
2315 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
2317 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
2318 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
2320 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
2322 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2323 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
2324 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
2325 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
2326 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2327 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
2329 static inline struct btrfs_timespec
*
2330 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2332 unsigned long ptr
= (unsigned long)inode_item
;
2333 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2334 return (struct btrfs_timespec
*)ptr
;
2337 static inline struct btrfs_timespec
*
2338 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2340 unsigned long ptr
= (unsigned long)inode_item
;
2341 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2342 return (struct btrfs_timespec
*)ptr
;
2345 static inline struct btrfs_timespec
*
2346 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2348 unsigned long ptr
= (unsigned long)inode_item
;
2349 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2350 return (struct btrfs_timespec
*)ptr
;
2353 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2354 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2355 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
2356 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2358 /* struct btrfs_dev_extent */
2359 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2361 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2362 chunk_objectid
, 64);
2363 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2365 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2367 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2369 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2370 return (unsigned long)dev
+ ptr
;
2373 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2374 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2376 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2378 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2381 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2383 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2384 struct btrfs_tree_block_info
*item
,
2385 struct btrfs_disk_key
*key
)
2387 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2390 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2391 struct btrfs_tree_block_info
*item
,
2392 struct btrfs_disk_key
*key
)
2394 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2397 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2399 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2401 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2403 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2406 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2409 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2411 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2414 static inline u32
btrfs_extent_inline_ref_size(int type
)
2416 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2417 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2418 return sizeof(struct btrfs_extent_inline_ref
);
2419 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2420 return sizeof(struct btrfs_shared_data_ref
) +
2421 sizeof(struct btrfs_extent_inline_ref
);
2422 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2423 return sizeof(struct btrfs_extent_data_ref
) +
2424 offsetof(struct btrfs_extent_inline_ref
, offset
);
2429 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2430 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2432 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2433 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2435 /* struct btrfs_node */
2436 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2437 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2438 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
2440 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
2443 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2446 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2447 sizeof(struct btrfs_key_ptr
) * nr
;
2448 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2451 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2455 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2456 sizeof(struct btrfs_key_ptr
) * nr
;
2457 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2460 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2463 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2464 sizeof(struct btrfs_key_ptr
) * nr
;
2465 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2468 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2472 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2473 sizeof(struct btrfs_key_ptr
) * nr
;
2474 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2477 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2479 return offsetof(struct btrfs_node
, ptrs
) +
2480 sizeof(struct btrfs_key_ptr
) * nr
;
2483 void btrfs_node_key(struct extent_buffer
*eb
,
2484 struct btrfs_disk_key
*disk_key
, int nr
);
2486 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2487 struct btrfs_disk_key
*disk_key
, int nr
)
2490 ptr
= btrfs_node_key_ptr_offset(nr
);
2491 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2492 struct btrfs_key_ptr
, key
, disk_key
);
2495 /* struct btrfs_item */
2496 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2497 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2498 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
2499 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
2501 static inline unsigned long btrfs_item_nr_offset(int nr
)
2503 return offsetof(struct btrfs_leaf
, items
) +
2504 sizeof(struct btrfs_item
) * nr
;
2507 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
2509 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2512 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2513 struct btrfs_item
*item
)
2515 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2518 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2520 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
2523 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2525 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
2528 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2530 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
2533 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2534 struct btrfs_disk_key
*disk_key
, int nr
)
2536 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2537 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2540 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2541 struct btrfs_disk_key
*disk_key
, int nr
)
2543 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2544 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2547 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2550 * struct btrfs_root_ref
2552 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2553 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2554 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2556 /* struct btrfs_dir_item */
2557 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2558 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2559 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2560 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2561 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2562 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2564 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2566 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2569 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2570 struct btrfs_dir_item
*item
,
2571 struct btrfs_disk_key
*key
)
2573 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2576 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2577 struct btrfs_dir_item
*item
,
2578 struct btrfs_disk_key
*key
)
2580 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2583 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2585 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2587 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2590 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2591 struct btrfs_free_space_header
*h
,
2592 struct btrfs_disk_key
*key
)
2594 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2597 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2598 struct btrfs_free_space_header
*h
,
2599 struct btrfs_disk_key
*key
)
2601 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2604 /* struct btrfs_disk_key */
2605 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2607 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2608 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2610 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2611 struct btrfs_disk_key
*disk
)
2613 cpu
->offset
= le64_to_cpu(disk
->offset
);
2614 cpu
->type
= disk
->type
;
2615 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2618 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2619 struct btrfs_key
*cpu
)
2621 disk
->offset
= cpu_to_le64(cpu
->offset
);
2622 disk
->type
= cpu
->type
;
2623 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2626 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2627 struct btrfs_key
*key
, int nr
)
2629 struct btrfs_disk_key disk_key
;
2630 btrfs_node_key(eb
, &disk_key
, nr
);
2631 btrfs_disk_key_to_cpu(key
, &disk_key
);
2634 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2635 struct btrfs_key
*key
, int nr
)
2637 struct btrfs_disk_key disk_key
;
2638 btrfs_item_key(eb
, &disk_key
, nr
);
2639 btrfs_disk_key_to_cpu(key
, &disk_key
);
2642 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2643 struct btrfs_dir_item
*item
,
2644 struct btrfs_key
*key
)
2646 struct btrfs_disk_key disk_key
;
2647 btrfs_dir_item_key(eb
, item
, &disk_key
);
2648 btrfs_disk_key_to_cpu(key
, &disk_key
);
2652 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2657 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2662 /* struct btrfs_header */
2663 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2664 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2666 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2667 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2668 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2669 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2670 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2672 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2673 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2675 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2677 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2679 return (btrfs_header_flags(eb
) & flag
) == flag
;
2682 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2684 u64 flags
= btrfs_header_flags(eb
);
2685 btrfs_set_header_flags(eb
, flags
| flag
);
2686 return (flags
& flag
) == flag
;
2689 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2691 u64 flags
= btrfs_header_flags(eb
);
2692 btrfs_set_header_flags(eb
, flags
& ~flag
);
2693 return (flags
& flag
) == flag
;
2696 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2698 u64 flags
= btrfs_header_flags(eb
);
2699 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2702 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2705 u64 flags
= btrfs_header_flags(eb
);
2706 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2707 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2708 btrfs_set_header_flags(eb
, flags
);
2711 static inline unsigned long btrfs_header_fsid(void)
2713 return offsetof(struct btrfs_header
, fsid
);
2716 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2718 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2721 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2723 return btrfs_header_level(eb
) == 0;
2726 /* struct btrfs_root_item */
2727 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2729 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2730 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2731 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2733 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2735 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2736 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2737 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2738 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2739 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2740 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2741 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2742 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2744 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2746 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2748 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2750 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2752 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2755 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2757 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2760 /* struct btrfs_root_backup */
2761 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2763 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2765 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2766 tree_root_level
, 8);
2768 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2770 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2771 chunk_root_gen
, 64);
2772 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2773 chunk_root_level
, 8);
2775 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2777 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2778 extent_root_gen
, 64);
2779 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2780 extent_root_level
, 8);
2782 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2784 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2786 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2789 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2791 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2793 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2796 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2798 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2800 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2801 csum_root_level
, 8);
2802 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2804 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2806 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2809 /* struct btrfs_balance_item */
2810 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2812 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2813 struct btrfs_balance_item
*bi
,
2814 struct btrfs_disk_balance_args
*ba
)
2816 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2819 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2820 struct btrfs_balance_item
*bi
,
2821 struct btrfs_disk_balance_args
*ba
)
2823 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2826 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2827 struct btrfs_balance_item
*bi
,
2828 struct btrfs_disk_balance_args
*ba
)
2830 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2833 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2834 struct btrfs_balance_item
*bi
,
2835 struct btrfs_disk_balance_args
*ba
)
2837 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2840 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2841 struct btrfs_balance_item
*bi
,
2842 struct btrfs_disk_balance_args
*ba
)
2844 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2847 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2848 struct btrfs_balance_item
*bi
,
2849 struct btrfs_disk_balance_args
*ba
)
2851 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2855 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2856 struct btrfs_disk_balance_args
*disk
)
2858 memset(cpu
, 0, sizeof(*cpu
));
2860 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2861 cpu
->usage
= le64_to_cpu(disk
->usage
);
2862 cpu
->devid
= le64_to_cpu(disk
->devid
);
2863 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2864 cpu
->pend
= le64_to_cpu(disk
->pend
);
2865 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2866 cpu
->vend
= le64_to_cpu(disk
->vend
);
2867 cpu
->target
= le64_to_cpu(disk
->target
);
2868 cpu
->flags
= le64_to_cpu(disk
->flags
);
2872 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2873 struct btrfs_balance_args
*cpu
)
2875 memset(disk
, 0, sizeof(*disk
));
2877 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2878 disk
->usage
= cpu_to_le64(cpu
->usage
);
2879 disk
->devid
= cpu_to_le64(cpu
->devid
);
2880 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2881 disk
->pend
= cpu_to_le64(cpu
->pend
);
2882 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2883 disk
->vend
= cpu_to_le64(cpu
->vend
);
2884 disk
->target
= cpu_to_le64(cpu
->target
);
2885 disk
->flags
= cpu_to_le64(cpu
->flags
);
2888 /* struct btrfs_super_block */
2889 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2890 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2891 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2893 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2894 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2895 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2896 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2897 struct btrfs_super_block
, chunk_root_generation
, 64);
2898 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2900 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2902 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2903 chunk_root_level
, 8);
2904 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2906 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2907 log_root_transid
, 64);
2908 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2910 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2912 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2914 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2916 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2918 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2920 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2922 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2923 root_dir_objectid
, 64);
2924 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2926 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2928 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2929 compat_ro_flags
, 64);
2930 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2931 incompat_flags
, 64);
2932 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2934 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2935 cache_generation
, 64);
2936 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2937 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2938 uuid_tree_generation
, 64);
2940 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2942 u16 t
= btrfs_super_csum_type(s
);
2944 * csum type is validated at mount time
2946 return btrfs_csum_sizes
[t
];
2949 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2951 return offsetof(struct btrfs_leaf
, items
);
2954 /* struct btrfs_file_extent_item */
2955 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2956 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2957 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2958 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2959 struct btrfs_file_extent_item
, offset
, 64);
2960 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2961 struct btrfs_file_extent_item
, generation
, 64);
2962 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2963 struct btrfs_file_extent_item
, num_bytes
, 64);
2964 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2965 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2966 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2967 struct btrfs_file_extent_item
, compression
, 8);
2969 static inline unsigned long
2970 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2972 unsigned long offset
= (unsigned long)e
;
2973 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2977 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2979 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2982 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2984 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2986 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2987 disk_num_bytes
, 64);
2988 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2990 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2992 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2994 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2996 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2998 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2999 other_encoding
, 16);
3002 * this returns the number of bytes used by the item on disk, minus the
3003 * size of any extent headers. If a file is compressed on disk, this is
3004 * the compressed size
3006 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
3007 struct btrfs_item
*e
)
3009 unsigned long offset
;
3010 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
3011 return btrfs_item_size(eb
, e
) - offset
;
3014 /* this returns the number of file bytes represented by the inline item.
3015 * If an item is compressed, this is the uncompressed size
3017 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
3019 struct btrfs_file_extent_item
*fi
)
3021 struct btrfs_map_token token
;
3023 btrfs_init_map_token(&token
);
3025 * return the space used on disk if this item isn't
3026 * compressed or encoded
3028 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
3029 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
3030 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
3031 return btrfs_file_extent_inline_item_len(eb
,
3032 btrfs_item_nr(slot
));
3035 /* otherwise use the ram bytes field */
3036 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
3040 /* btrfs_dev_stats_item */
3041 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
3042 struct btrfs_dev_stats_item
*ptr
,
3047 read_extent_buffer(eb
, &val
,
3048 offsetof(struct btrfs_dev_stats_item
, values
) +
3049 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3054 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
3055 struct btrfs_dev_stats_item
*ptr
,
3058 write_extent_buffer(eb
, &val
,
3059 offsetof(struct btrfs_dev_stats_item
, values
) +
3060 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3064 /* btrfs_qgroup_status_item */
3065 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
3067 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
3069 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
3071 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
3074 /* btrfs_qgroup_info_item */
3075 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
3077 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
3078 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
3080 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
3081 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
3084 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
3085 struct btrfs_qgroup_info_item
, generation
, 64);
3086 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
3088 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
3089 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
3090 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
3092 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
3093 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
3095 /* btrfs_qgroup_limit_item */
3096 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
3098 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
3100 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
3102 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
3104 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
3107 /* btrfs_dev_replace_item */
3108 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
3109 struct btrfs_dev_replace_item
, src_devid
, 64);
3110 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
3111 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
3113 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
3115 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
3117 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
3119 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
3120 num_write_errors
, 64);
3121 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
3122 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
3124 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
3126 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
3129 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
3130 struct btrfs_dev_replace_item
, src_devid
, 64);
3131 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
3132 struct btrfs_dev_replace_item
,
3133 cont_reading_from_srcdev_mode
, 64);
3134 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
3135 struct btrfs_dev_replace_item
, replace_state
, 64);
3136 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
3137 struct btrfs_dev_replace_item
, time_started
, 64);
3138 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
3139 struct btrfs_dev_replace_item
, time_stopped
, 64);
3140 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
3141 struct btrfs_dev_replace_item
, num_write_errors
, 64);
3142 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
3143 struct btrfs_dev_replace_item
,
3144 num_uncorrectable_read_errors
, 64);
3145 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
3146 struct btrfs_dev_replace_item
, cursor_left
, 64);
3147 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
3148 struct btrfs_dev_replace_item
, cursor_right
, 64);
3150 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
3152 return sb
->s_fs_info
;
3155 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
3158 return root
->leafsize
;
3159 return root
->nodesize
;
3162 /* helper function to cast into the data area of the leaf. */
3163 #define btrfs_item_ptr(leaf, slot, type) \
3164 ((type *)(btrfs_leaf_data(leaf) + \
3165 btrfs_item_offset_nr(leaf, slot)))
3167 #define btrfs_item_ptr_offset(leaf, slot) \
3168 ((unsigned long)(btrfs_leaf_data(leaf) + \
3169 btrfs_item_offset_nr(leaf, slot)))
3171 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
3173 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
3174 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
3177 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
3179 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
3183 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
3186 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3191 * Doing a truncate won't result in new nodes or leaves, just what we need for
3194 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3197 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3201 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
3202 struct btrfs_root
*root
);
3203 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
3204 struct btrfs_root
*root
);
3205 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3206 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3207 struct btrfs_root
*root
, unsigned long count
);
3208 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3209 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3210 struct btrfs_root
*root
, u64 bytenr
,
3211 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3212 int btrfs_pin_extent(struct btrfs_root
*root
,
3213 u64 bytenr
, u64 num
, int reserved
);
3214 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3215 u64 bytenr
, u64 num_bytes
);
3216 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
3217 struct extent_buffer
*eb
);
3218 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3219 struct btrfs_root
*root
,
3220 u64 objectid
, u64 offset
, u64 bytenr
);
3221 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3222 struct btrfs_fs_info
*info
,
3224 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3225 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
3226 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
3227 struct btrfs_root
*root
, u32 blocksize
,
3228 u64 parent
, u64 root_objectid
,
3229 struct btrfs_disk_key
*key
, int level
,
3230 u64 hint
, u64 empty_size
);
3231 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3232 struct btrfs_root
*root
,
3233 struct extent_buffer
*buf
,
3234 u64 parent
, int last_ref
);
3235 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3236 struct btrfs_root
*root
,
3237 u64 root_objectid
, u64 owner
,
3238 u64 offset
, struct btrfs_key
*ins
);
3239 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3240 struct btrfs_root
*root
,
3241 u64 root_objectid
, u64 owner
, u64 offset
,
3242 struct btrfs_key
*ins
);
3243 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
3244 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
3245 struct btrfs_key
*ins
, int is_data
);
3246 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3247 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3248 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3249 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3250 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3251 struct btrfs_root
*root
,
3252 u64 bytenr
, u64 num_bytes
, u64 flags
,
3253 int level
, int is_data
);
3254 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3255 struct btrfs_root
*root
,
3256 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3257 u64 owner
, u64 offset
, int for_cow
);
3259 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3260 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3261 u64 start
, u64 len
);
3262 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3263 struct btrfs_root
*root
);
3264 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3265 struct btrfs_root
*root
);
3266 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3267 struct btrfs_root
*root
,
3268 u64 bytenr
, u64 num_bytes
, u64 parent
,
3269 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3271 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3272 struct btrfs_root
*root
);
3273 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3274 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3275 int btrfs_read_block_groups(struct btrfs_root
*root
);
3276 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3277 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3278 struct btrfs_root
*root
, u64 bytes_used
,
3279 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3281 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3282 struct btrfs_root
*root
, u64 group_start
);
3283 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3284 struct btrfs_root
*root
);
3285 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3286 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3288 enum btrfs_reserve_flush_enum
{
3289 /* If we are in the transaction, we can't flush anything.*/
3290 BTRFS_RESERVE_NO_FLUSH
,
3292 * Flushing delalloc may cause deadlock somewhere, in this
3293 * case, use FLUSH LIMIT
3295 BTRFS_RESERVE_FLUSH_LIMIT
,
3296 BTRFS_RESERVE_FLUSH_ALL
,
3299 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3300 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3301 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3302 struct btrfs_root
*root
);
3303 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3304 struct inode
*inode
);
3305 void btrfs_orphan_release_metadata(struct inode
*inode
);
3306 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3307 struct btrfs_block_rsv
*rsv
,
3309 u64
*qgroup_reserved
, bool use_global_rsv
);
3310 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3311 struct btrfs_block_rsv
*rsv
,
3312 u64 qgroup_reserved
);
3313 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3314 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3315 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3316 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3317 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3318 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3319 unsigned short type
);
3320 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3321 struct btrfs_block_rsv
*rsv
);
3322 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3323 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3324 enum btrfs_reserve_flush_enum flush
);
3325 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3326 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3327 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3328 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3329 enum btrfs_reserve_flush_enum flush
);
3330 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3331 struct btrfs_block_rsv
*dst_rsv
,
3333 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
3334 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
3336 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3337 struct btrfs_block_rsv
*block_rsv
,
3339 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3340 struct btrfs_block_group_cache
*cache
);
3341 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3342 struct btrfs_block_group_cache
*cache
);
3343 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3344 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3345 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3346 u64 start
, u64 end
);
3347 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3348 u64 num_bytes
, u64
*actual_bytes
);
3349 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3350 struct btrfs_root
*root
, u64 type
);
3351 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3353 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3354 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3355 struct btrfs_fs_info
*fs_info
);
3356 int __get_raid_index(u64 flags
);
3358 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3359 int level
, int *slot
);
3360 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3361 int btrfs_previous_item(struct btrfs_root
*root
,
3362 struct btrfs_path
*path
, u64 min_objectid
,
3364 int btrfs_previous_extent_item(struct btrfs_root
*root
,
3365 struct btrfs_path
*path
, u64 min_objectid
);
3366 void btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
3367 struct btrfs_key
*new_key
);
3368 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3369 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3370 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3371 struct btrfs_key
*key
, int lowest_level
,
3373 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3374 struct btrfs_path
*path
,
3376 enum btrfs_compare_tree_result
{
3377 BTRFS_COMPARE_TREE_NEW
,
3378 BTRFS_COMPARE_TREE_DELETED
,
3379 BTRFS_COMPARE_TREE_CHANGED
,
3380 BTRFS_COMPARE_TREE_SAME
,
3382 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3383 struct btrfs_root
*right_root
,
3384 struct btrfs_path
*left_path
,
3385 struct btrfs_path
*right_path
,
3386 struct btrfs_key
*key
,
3387 enum btrfs_compare_tree_result result
,
3389 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3390 struct btrfs_root
*right_root
,
3391 btrfs_changed_cb_t cb
, void *ctx
);
3392 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3393 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3394 struct extent_buffer
*parent
, int parent_slot
,
3395 struct extent_buffer
**cow_ret
);
3396 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3397 struct btrfs_root
*root
,
3398 struct extent_buffer
*buf
,
3399 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3400 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3401 struct extent_buffer
*buf
);
3402 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3404 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3405 u32 new_size
, int from_end
);
3406 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3407 struct btrfs_root
*root
,
3408 struct btrfs_path
*path
,
3409 struct btrfs_key
*new_key
,
3410 unsigned long split_offset
);
3411 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3412 struct btrfs_root
*root
,
3413 struct btrfs_path
*path
,
3414 struct btrfs_key
*new_key
);
3415 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
3416 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
3417 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3418 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3420 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3421 struct btrfs_path
*p
, u64 time_seq
);
3422 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3423 struct btrfs_key
*key
, struct btrfs_path
*p
,
3424 int find_higher
, int return_any
);
3425 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3426 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3427 int start_slot
, u64
*last_ret
,
3428 struct btrfs_key
*progress
);
3429 void btrfs_release_path(struct btrfs_path
*p
);
3430 struct btrfs_path
*btrfs_alloc_path(void);
3431 void btrfs_free_path(struct btrfs_path
*p
);
3432 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3433 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3434 struct extent_buffer
*held
, int held_rw
);
3435 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3437 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3438 struct btrfs_path
*path
, int slot
, int nr
);
3439 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3440 struct btrfs_root
*root
,
3441 struct btrfs_path
*path
)
3443 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3446 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
3447 struct btrfs_key
*cpu_key
, u32
*data_size
,
3448 u32 total_data
, u32 total_size
, int nr
);
3449 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3450 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3451 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3452 struct btrfs_root
*root
,
3453 struct btrfs_path
*path
,
3454 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3456 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3457 struct btrfs_root
*root
,
3458 struct btrfs_path
*path
,
3459 struct btrfs_key
*key
,
3462 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3465 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3466 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3467 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3469 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3470 struct btrfs_path
*p
, u64 time_seq
)
3473 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3474 return btrfs_next_old_leaf(root
, p
, time_seq
);
3477 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3479 return btrfs_next_old_item(root
, p
, 0);
3481 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3482 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3483 struct btrfs_block_rsv
*block_rsv
,
3484 int update_ref
, int for_reloc
);
3485 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3486 struct btrfs_root
*root
,
3487 struct extent_buffer
*node
,
3488 struct extent_buffer
*parent
);
3489 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3492 * Get synced with close_ctree()
3495 return fs_info
->closing
;
3499 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3500 * anything except sleeping. This function is used to check the status of
3503 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
3505 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
3506 btrfs_fs_closing(root
->fs_info
));
3509 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3511 kfree(fs_info
->balance_ctl
);
3512 kfree(fs_info
->delayed_root
);
3513 kfree(fs_info
->extent_root
);
3514 kfree(fs_info
->tree_root
);
3515 kfree(fs_info
->chunk_root
);
3516 kfree(fs_info
->dev_root
);
3517 kfree(fs_info
->csum_root
);
3518 kfree(fs_info
->quota_root
);
3519 kfree(fs_info
->uuid_root
);
3520 kfree(fs_info
->super_copy
);
3521 kfree(fs_info
->super_for_commit
);
3525 /* tree mod log functions from ctree.c */
3526 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3527 struct seq_list
*elem
);
3528 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3529 struct seq_list
*elem
);
3530 u64
btrfs_tree_mod_seq_prev(u64 seq
);
3531 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3534 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3535 struct btrfs_path
*path
,
3536 u64 root_id
, u64 ref_id
);
3537 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3538 struct btrfs_root
*tree_root
,
3539 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3540 const char *name
, int name_len
);
3541 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3542 struct btrfs_root
*tree_root
,
3543 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3544 const char *name
, int name_len
);
3545 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3546 struct btrfs_key
*key
);
3547 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3548 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3550 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3551 struct btrfs_root
*root
,
3552 struct btrfs_key
*key
,
3553 struct btrfs_root_item
*item
);
3554 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
3555 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3556 struct btrfs_key
*root_key
);
3557 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3558 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3559 struct extent_buffer
*node
);
3560 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3561 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3562 struct btrfs_root
*root
);
3565 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3566 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3568 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3569 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3571 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3572 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3576 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3577 const char *name
, int name_len
);
3578 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3579 struct btrfs_root
*root
, const char *name
,
3580 int name_len
, struct inode
*dir
,
3581 struct btrfs_key
*location
, u8 type
, u64 index
);
3582 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3583 struct btrfs_root
*root
,
3584 struct btrfs_path
*path
, u64 dir
,
3585 const char *name
, int name_len
,
3587 struct btrfs_dir_item
*
3588 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3589 struct btrfs_root
*root
,
3590 struct btrfs_path
*path
, u64 dir
,
3591 u64 objectid
, const char *name
, int name_len
,
3593 struct btrfs_dir_item
*
3594 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3595 struct btrfs_path
*path
, u64 dirid
,
3596 const char *name
, int name_len
);
3597 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3598 struct btrfs_root
*root
,
3599 struct btrfs_path
*path
,
3600 struct btrfs_dir_item
*di
);
3601 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3602 struct btrfs_root
*root
,
3603 struct btrfs_path
*path
, u64 objectid
,
3604 const char *name
, u16 name_len
,
3605 const void *data
, u16 data_len
);
3606 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3607 struct btrfs_root
*root
,
3608 struct btrfs_path
*path
, u64 dir
,
3609 const char *name
, u16 name_len
,
3611 int verify_dir_item(struct btrfs_root
*root
,
3612 struct extent_buffer
*leaf
,
3613 struct btrfs_dir_item
*dir_item
);
3616 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3617 struct btrfs_root
*root
, u64 offset
);
3618 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3619 struct btrfs_root
*root
, u64 offset
);
3620 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3623 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3624 struct btrfs_root
*root
,
3625 const char *name
, int name_len
,
3626 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3627 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3628 struct btrfs_root
*root
,
3629 const char *name
, int name_len
,
3630 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3631 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3632 struct btrfs_root
*root
,
3633 struct btrfs_path
*path
, u64 objectid
);
3634 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3635 *root
, struct btrfs_path
*path
,
3636 struct btrfs_key
*location
, int mod
);
3638 struct btrfs_inode_extref
*
3639 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3640 struct btrfs_root
*root
,
3641 struct btrfs_path
*path
,
3642 const char *name
, int name_len
,
3643 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3646 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3647 u64 ref_objectid
, const char *name
,
3649 struct btrfs_inode_extref
**extref_ret
);
3652 struct btrfs_dio_private
;
3653 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3654 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3655 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3656 struct bio
*bio
, u32
*dst
);
3657 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3658 struct btrfs_dio_private
*dip
, struct bio
*bio
,
3659 u64 logical_offset
);
3660 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3661 struct btrfs_root
*root
,
3662 u64 objectid
, u64 pos
,
3663 u64 disk_offset
, u64 disk_num_bytes
,
3664 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3665 u8 compression
, u8 encryption
, u16 other_encoding
);
3666 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3667 struct btrfs_root
*root
,
3668 struct btrfs_path
*path
, u64 objectid
,
3669 u64 bytenr
, int mod
);
3670 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3671 struct btrfs_root
*root
,
3672 struct btrfs_ordered_sum
*sums
);
3673 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3674 struct bio
*bio
, u64 file_start
, int contig
);
3675 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3676 struct list_head
*list
, int search_commit
);
3678 struct btrfs_delalloc_work
{
3679 struct inode
*inode
;
3682 struct completion completion
;
3683 struct list_head list
;
3684 struct btrfs_work work
;
3687 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3688 int wait
, int delay_iput
);
3689 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3691 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3692 size_t pg_offset
, u64 start
, u64 len
,
3694 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3695 u64
*orig_start
, u64
*orig_block_len
,
3698 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3699 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3700 #define ClearPageChecked ClearPageFsMisc
3701 #define SetPageChecked SetPageFsMisc
3702 #define PageChecked PageFsMisc
3705 /* This forces readahead on a given range of bytes in an inode */
3706 static inline void btrfs_force_ra(struct address_space
*mapping
,
3707 struct file_ra_state
*ra
, struct file
*file
,
3708 pgoff_t offset
, unsigned long req_size
)
3710 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3713 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3714 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3715 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3716 struct btrfs_root
*root
,
3717 struct inode
*dir
, struct inode
*inode
,
3718 const char *name
, int name_len
);
3719 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3720 struct inode
*parent_inode
, struct inode
*inode
,
3721 const char *name
, int name_len
, int add_backref
, u64 index
);
3722 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3723 struct btrfs_root
*root
,
3724 struct inode
*dir
, u64 objectid
,
3725 const char *name
, int name_len
);
3726 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3728 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3729 struct btrfs_root
*root
,
3730 struct inode
*inode
, u64 new_size
,
3733 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3734 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
);
3735 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3736 struct extent_state
**cached_state
);
3737 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3738 struct btrfs_root
*new_root
,
3739 struct btrfs_root
*parent_root
,
3741 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3742 size_t size
, struct bio
*bio
,
3743 unsigned long bio_flags
);
3744 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3745 int btrfs_readpage(struct file
*file
, struct page
*page
);
3746 void btrfs_evict_inode(struct inode
*inode
);
3747 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3748 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3749 void btrfs_destroy_inode(struct inode
*inode
);
3750 int btrfs_drop_inode(struct inode
*inode
);
3751 int btrfs_init_cachep(void);
3752 void btrfs_destroy_cachep(void);
3753 long btrfs_ioctl_trans_end(struct file
*file
);
3754 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3755 struct btrfs_root
*root
, int *was_new
);
3756 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3757 size_t pg_offset
, u64 start
, u64 end
,
3759 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3760 struct btrfs_root
*root
,
3761 struct inode
*inode
);
3762 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3763 struct btrfs_root
*root
, struct inode
*inode
);
3764 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3765 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3766 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3767 struct btrfs_root
*root
);
3768 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3769 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3770 void btrfs_add_delayed_iput(struct inode
*inode
);
3771 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3772 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3773 u64 start
, u64 num_bytes
, u64 min_size
,
3774 loff_t actual_len
, u64
*alloc_hint
);
3775 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3776 struct btrfs_trans_handle
*trans
, int mode
,
3777 u64 start
, u64 num_bytes
, u64 min_size
,
3778 loff_t actual_len
, u64
*alloc_hint
);
3779 extern const struct dentry_operations btrfs_dentry_operations
;
3782 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3783 void btrfs_update_iflags(struct inode
*inode
);
3784 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3785 int btrfs_is_empty_uuid(u8
*uuid
);
3786 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3787 struct btrfs_ioctl_defrag_range_args
*range
,
3788 u64 newer_than
, unsigned long max_pages
);
3789 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3790 struct btrfs_ioctl_space_info
*space
);
3791 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3792 struct btrfs_ioctl_balance_args
*bargs
);
3796 int btrfs_auto_defrag_init(void);
3797 void btrfs_auto_defrag_exit(void);
3798 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3799 struct inode
*inode
);
3800 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3801 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3802 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3803 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3805 extern const struct file_operations btrfs_file_operations
;
3806 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3807 struct btrfs_root
*root
, struct inode
*inode
,
3808 struct btrfs_path
*path
, u64 start
, u64 end
,
3809 u64
*drop_end
, int drop_cache
,
3811 u32 extent_item_size
,
3813 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3814 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3815 u64 end
, int drop_cache
);
3816 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3817 struct inode
*inode
, u64 start
, u64 end
);
3818 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3819 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3820 struct page
**pages
, size_t num_pages
,
3821 loff_t pos
, size_t write_bytes
,
3822 struct extent_state
**cached
);
3825 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3826 struct btrfs_root
*root
);
3829 int btrfs_init_sysfs(void);
3830 void btrfs_exit_sysfs(void);
3831 int btrfs_sysfs_add_one(struct btrfs_fs_info
*fs_info
);
3832 void btrfs_sysfs_remove_one(struct btrfs_fs_info
*fs_info
);
3835 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3838 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3839 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3841 #ifdef CONFIG_PRINTK
3843 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3845 static inline __printf(2, 3)
3846 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3851 #define btrfs_emerg(fs_info, fmt, args...) \
3852 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3853 #define btrfs_alert(fs_info, fmt, args...) \
3854 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3855 #define btrfs_crit(fs_info, fmt, args...) \
3856 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3857 #define btrfs_err(fs_info, fmt, args...) \
3858 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3859 #define btrfs_warn(fs_info, fmt, args...) \
3860 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3861 #define btrfs_notice(fs_info, fmt, args...) \
3862 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3863 #define btrfs_info(fs_info, fmt, args...) \
3864 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3867 #define btrfs_debug(fs_info, fmt, args...) \
3868 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3870 #define btrfs_debug(fs_info, fmt, args...) \
3871 no_printk(KERN_DEBUG fmt, ##args)
3874 #ifdef CONFIG_BTRFS_ASSERT
3876 static inline void assfail(char *expr
, char *file
, int line
)
3878 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3883 #define ASSERT(expr) \
3884 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3886 #define ASSERT(expr) ((void)0)
3889 #define btrfs_assert()
3891 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3892 unsigned int line
, int errno
, const char *fmt
, ...);
3895 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3896 struct btrfs_root
*root
, const char *function
,
3897 unsigned int line
, int errno
);
3899 #define btrfs_set_fs_incompat(__fs_info, opt) \
3900 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3902 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3905 struct btrfs_super_block
*disk_super
;
3908 disk_super
= fs_info
->super_copy
;
3909 features
= btrfs_super_incompat_flags(disk_super
);
3910 if (!(features
& flag
)) {
3911 spin_lock(&fs_info
->super_lock
);
3912 features
= btrfs_super_incompat_flags(disk_super
);
3913 if (!(features
& flag
)) {
3915 btrfs_set_super_incompat_flags(disk_super
, features
);
3916 btrfs_info(fs_info
, "setting %llu feature flag",
3919 spin_unlock(&fs_info
->super_lock
);
3923 #define btrfs_fs_incompat(fs_info, opt) \
3924 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3926 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3928 struct btrfs_super_block
*disk_super
;
3929 disk_super
= fs_info
->super_copy
;
3930 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3934 * Call btrfs_abort_transaction as early as possible when an error condition is
3935 * detected, that way the exact line number is reported.
3938 #define btrfs_abort_transaction(trans, root, errno) \
3940 __btrfs_abort_transaction(trans, root, __func__, \
3944 #define btrfs_std_error(fs_info, errno) \
3947 __btrfs_std_error((fs_info), __func__, \
3948 __LINE__, (errno), NULL); \
3951 #define btrfs_error(fs_info, errno, fmt, args...) \
3953 __btrfs_std_error((fs_info), __func__, __LINE__, \
3954 (errno), fmt, ##args); \
3958 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3959 unsigned int line
, int errno
, const char *fmt
, ...);
3962 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3963 * will panic(). Otherwise we BUG() here.
3965 #define btrfs_panic(fs_info, errno, fmt, args...) \
3967 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3972 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3973 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3974 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3975 struct inode
*inode
, struct inode
*dir
);
3976 int btrfs_acl_chmod(struct inode
*inode
);
3978 #define btrfs_get_acl NULL
3979 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3980 struct inode
*inode
, struct inode
*dir
)
3984 static inline int btrfs_acl_chmod(struct inode
*inode
)
3991 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3992 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3993 struct btrfs_root
*root
);
3994 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3995 struct btrfs_root
*root
);
3996 int btrfs_recover_relocation(struct btrfs_root
*root
);
3997 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3998 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3999 struct btrfs_root
*root
, struct extent_buffer
*buf
,
4000 struct extent_buffer
*cow
);
4001 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
4002 struct btrfs_pending_snapshot
*pending
,
4003 u64
*bytes_to_reserve
);
4004 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
4005 struct btrfs_pending_snapshot
*pending
);
4008 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
4009 u64 end
, struct btrfs_scrub_progress
*progress
,
4010 int readonly
, int is_dev_replace
);
4011 void btrfs_scrub_pause(struct btrfs_root
*root
);
4012 void btrfs_scrub_continue(struct btrfs_root
*root
);
4013 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
4014 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
4015 struct btrfs_device
*dev
);
4016 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
4017 struct btrfs_scrub_progress
*progress
);
4020 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
4021 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
4022 void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
);
4025 struct reada_control
{
4026 struct btrfs_root
*root
; /* tree to prefetch */
4027 struct btrfs_key key_start
;
4028 struct btrfs_key key_end
; /* exclusive */
4031 wait_queue_head_t wait
;
4033 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
4034 struct btrfs_key
*start
, struct btrfs_key
*end
);
4035 int btrfs_reada_wait(void *handle
);
4036 void btrfs_reada_detach(void *handle
);
4037 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
4038 u64 start
, int err
);
4041 struct qgroup_update
{
4042 struct list_head list
;
4043 struct btrfs_delayed_ref_node
*node
;
4044 struct btrfs_delayed_extent_op
*extent_op
;
4047 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
4048 struct btrfs_fs_info
*fs_info
);
4049 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
4050 struct btrfs_fs_info
*fs_info
);
4051 int btrfs_qgroup_rescan(struct btrfs_fs_info
*fs_info
);
4052 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info
*fs_info
);
4053 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info
*fs_info
);
4054 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
4055 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
4056 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
4057 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
4058 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
4059 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
4061 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
4062 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
4063 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
4064 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
4065 struct btrfs_qgroup_limit
*limit
);
4066 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
4067 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
4068 struct btrfs_delayed_extent_op
;
4069 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
4070 struct btrfs_delayed_ref_node
*node
,
4071 struct btrfs_delayed_extent_op
*extent_op
);
4072 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
4073 struct btrfs_fs_info
*fs_info
,
4074 struct btrfs_delayed_ref_node
*node
,
4075 struct btrfs_delayed_extent_op
*extent_op
);
4076 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
4077 struct btrfs_fs_info
*fs_info
);
4078 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
4079 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
4080 struct btrfs_qgroup_inherit
*inherit
);
4081 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
4082 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
4084 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
4086 static inline int is_fstree(u64 rootid
)
4088 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
4089 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)
4094 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
4096 return signal_pending(current
);
4099 /* Sanity test specific functions */
4100 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4101 void btrfs_test_destroy_inode(struct inode
*inode
);