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 <linux/workqueue.h>
37 #include <linux/security.h>
38 #include <linux/sizes.h>
39 #include "extent_io.h"
40 #include "extent_map.h"
41 #include "async-thread.h"
43 struct btrfs_trans_handle;
44 struct btrfs_transaction;
45 struct btrfs_pending_snapshot;
46 extern struct kmem_cache *btrfs_trans_handle_cachep;
47 extern struct kmem_cache *btrfs_transaction_cachep;
48 extern struct kmem_cache *btrfs_bit_radix_cachep;
49 extern struct kmem_cache *btrfs_path_cachep;
50 extern struct kmem_cache *btrfs_free_space_cachep;
51 struct btrfs_ordered_sum;
53 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
54 #define STATIC noinline
56 #define STATIC static noinline
59 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
61 #define BTRFS_MAX_MIRRORS 3
63 #define BTRFS_MAX_LEVEL 8
65 #define BTRFS_COMPAT_EXTENT_TREE_V0
67 /* holds pointers to all of the tree roots */
68 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
70 /* stores information about which extents are in use, and reference counts */
71 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
74 * chunk tree stores translations from logical -> physical block numbering
75 * the super block points to the chunk tree
77 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
80 * stores information about which areas of a given device are in use.
81 * one per device. The tree of tree roots points to the device tree
83 #define BTRFS_DEV_TREE_OBJECTID 4ULL
85 /* one per subvolume, storing files and directories */
86 #define BTRFS_FS_TREE_OBJECTID 5ULL
88 /* directory objectid inside the root tree */
89 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
91 /* holds checksums of all the data extents */
92 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* for storing items that use the BTRFS_UUID_KEY* types */
98 #define BTRFS_UUID_TREE_OBJECTID 9ULL
100 /* tracks free space in block groups. */
101 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
103 /* device stats in the device tree */
104 #define BTRFS_DEV_STATS_OBJECTID 0ULL
106 /* for storing balance parameters in the root tree */
107 #define BTRFS_BALANCE_OBJECTID -4ULL
109 /* orhpan objectid for tracking unlinked/truncated files */
110 #define BTRFS_ORPHAN_OBJECTID -5ULL
112 /* does write ahead logging to speed up fsyncs */
113 #define BTRFS_TREE_LOG_OBJECTID -6ULL
114 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
116 /* for space balancing */
117 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
118 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
121 * extent checksums all have this objectid
122 * this allows them to share the logging tree
125 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
127 /* For storing free space cache */
128 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
131 * The inode number assigned to the special inode for storing
134 #define BTRFS_FREE_INO_OBJECTID -12ULL
136 /* dummy objectid represents multiple objectids */
137 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
140 * All files have objectids in this range.
142 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
143 #define BTRFS_LAST_FREE_OBJECTID -256ULL
144 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
148 * the device items go into the chunk tree. The key is in the form
149 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
151 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
153 #define BTRFS_BTREE_INODE_OBJECTID 1
155 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
157 #define BTRFS_DEV_REPLACE_DEVID 0ULL
160 * the max metadata block size. This limit is somewhat artificial,
161 * but the memmove costs go through the roof for larger blocks.
163 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
166 * we can actually store much bigger names, but lets not confuse the rest
169 #define BTRFS_NAME_LEN 255
172 * Theoretical limit is larger, but we keep this down to a sane
173 * value. That should limit greatly the possibility of collisions on
176 #define BTRFS_LINK_MAX 65535U
178 /* 32 bytes in various csum fields */
179 #define BTRFS_CSUM_SIZE 32
182 #define BTRFS_CSUM_TYPE_CRC32 0
184 static const int btrfs_csum_sizes[] = { 4 };
186 /* four bytes for CRC32 */
187 #define BTRFS_EMPTY_DIR_SIZE 0
189 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
190 #define REQ_GET_READ_MIRRORS (1 << 30)
192 #define BTRFS_FT_UNKNOWN 0
193 #define BTRFS_FT_REG_FILE 1
194 #define BTRFS_FT_DIR 2
195 #define BTRFS_FT_CHRDEV 3
196 #define BTRFS_FT_BLKDEV 4
197 #define BTRFS_FT_FIFO 5
198 #define BTRFS_FT_SOCK 6
199 #define BTRFS_FT_SYMLINK 7
200 #define BTRFS_FT_XATTR 8
201 #define BTRFS_FT_MAX 9
203 /* ioprio of readahead is set to idle */
204 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
206 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
208 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
211 * The key defines the order in the tree, and so it also defines (optimal)
214 * objectid corresponds to the inode number.
216 * type tells us things about the object, and is a kind of stream selector.
217 * so for a given inode, keys with type of 1 might refer to the inode data,
218 * type of 2 may point to file data in the btree and type == 3 may point to
221 * offset is the starting byte offset for this key in the stream.
223 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
224 * in cpu native order. Otherwise they are identical and their sizes
225 * should be the same (ie both packed)
227 struct btrfs_disk_key {
231 } __attribute__ ((__packed__));
237 } __attribute__ ((__packed__));
239 struct btrfs_mapping_tree {
240 struct extent_map_tree map_tree;
243 struct btrfs_dev_item {
244 /* the internal btrfs device id */
247 /* size of the device */
253 /* optimal io alignment for this device */
256 /* optimal io width for this device */
259 /* minimal io size for this device */
262 /* type and info about this device */
265 /* expected generation for this device */
269 * starting byte of this partition on the device,
270 * to allow for stripe alignment in the future
274 /* grouping information for allocation decisions */
277 /* seek speed 0-100 where 100 is fastest */
280 /* bandwidth 0-100 where 100 is fastest */
283 /* btrfs generated uuid for this device */
284 u8 uuid[BTRFS_UUID_SIZE];
286 /* uuid of FS who owns this device */
287 u8 fsid[BTRFS_UUID_SIZE];
288 } __attribute__ ((__packed__));
290 struct btrfs_stripe {
293 u8 dev_uuid[BTRFS_UUID_SIZE];
294 } __attribute__ ((__packed__));
297 /* size of this chunk in bytes */
300 /* objectid of the root referencing this chunk */
306 /* optimal io alignment for this chunk */
309 /* optimal io width for this chunk */
312 /* minimal io size for this chunk */
315 /* 2^16 stripes is quite a lot, a second limit is the size of a single
320 /* sub stripes only matter for raid10 */
322 struct btrfs_stripe stripe;
323 /* additional stripes go here */
324 } __attribute__ ((__packed__));
326 #define BTRFS_FREE_SPACE_EXTENT 1
327 #define BTRFS_FREE_SPACE_BITMAP 2
329 struct btrfs_free_space_entry {
333 } __attribute__ ((__packed__));
335 struct btrfs_free_space_header {
336 struct btrfs_disk_key location;
340 } __attribute__ ((__packed__));
342 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
344 BUG_ON(num_stripes == 0);
345 return sizeof(struct btrfs_chunk) +
346 sizeof(struct btrfs_stripe) * (num_stripes - 1);
349 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
350 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
355 #define BTRFS_FS_STATE_ERROR 0
356 #define BTRFS_FS_STATE_REMOUNTING 1
357 #define BTRFS_FS_STATE_TRANS_ABORTED 2
358 #define BTRFS_FS_STATE_DEV_REPLACING 3
360 /* Super block flags */
361 /* Errors detected */
362 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
364 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
365 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
367 #define BTRFS_BACKREF_REV_MAX 256
368 #define BTRFS_BACKREF_REV_SHIFT 56
369 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
370 BTRFS_BACKREF_REV_SHIFT)
372 #define BTRFS_OLD_BACKREF_REV 0
373 #define BTRFS_MIXED_BACKREF_REV 1
376 * every tree block (leaf or node) starts with this header.
378 struct btrfs_header {
379 /* these first four must match the super block */
380 u8 csum[BTRFS_CSUM_SIZE];
381 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
382 __le64 bytenr; /* which block this node is supposed to live in */
385 /* allowed to be different from the super from here on down */
386 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
391 } __attribute__ ((__packed__));
393 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
394 sizeof(struct btrfs_header)) / \
395 sizeof(struct btrfs_key_ptr))
396 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
397 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
398 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
399 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
400 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
401 sizeof(struct btrfs_item) - \
402 BTRFS_FILE_EXTENT_INLINE_DATA_START)
403 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
404 sizeof(struct btrfs_item) -\
405 sizeof(struct btrfs_dir_item))
409 * this is a very generous portion of the super block, giving us
410 * room to translate 14 chunks with 3 stripes each.
412 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
413 #define BTRFS_LABEL_SIZE 256
416 * just in case we somehow lose the roots and are not able to mount,
417 * we store an array of the roots from previous transactions
420 #define BTRFS_NUM_BACKUP_ROOTS 4
421 struct btrfs_root_backup {
423 __le64 tree_root_gen;
426 __le64 chunk_root_gen;
429 __le64 extent_root_gen;
438 __le64 csum_root_gen;
448 u8 extent_root_level;
452 /* future and to align */
454 } __attribute__ ((__packed__));
457 * the super block basically lists the main trees of the FS
458 * it currently lacks any block count etc etc
460 struct btrfs_super_block {
461 u8 csum[BTRFS_CSUM_SIZE];
462 /* the first 4 fields must match struct btrfs_header */
463 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
464 __le64 bytenr; /* this block number */
467 /* allowed to be different from the btrfs_header from here own down */
474 /* this will help find the new super based on the log root */
475 __le64 log_root_transid;
478 __le64 root_dir_objectid;
482 __le32 __unused_leafsize;
484 __le32 sys_chunk_array_size;
485 __le64 chunk_root_generation;
487 __le64 compat_ro_flags;
488 __le64 incompat_flags;
493 struct btrfs_dev_item dev_item;
495 char label[BTRFS_LABEL_SIZE];
497 __le64 cache_generation;
498 __le64 uuid_tree_generation;
500 /* future expansion */
502 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
503 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
504 } __attribute__ ((__packed__));
507 * Compat flags that we support. If any incompat flags are set other than the
508 * ones specified below then we will fail to mount
510 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
512 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
513 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
514 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
515 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
517 * some patches floated around with a second compression method
518 * lets save that incompat here for when they do get in
519 * Note we don't actually support it, we're just reserving the
522 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
525 * older kernels tried to do bigger metadata blocks, but the
526 * code was pretty buggy. Lets not let them try anymore.
528 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
530 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
531 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
532 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
533 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
535 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
536 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
537 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
539 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
540 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
542 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
543 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
545 #define BTRFS_FEATURE_INCOMPAT_SUPP \
546 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
547 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
548 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
549 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
550 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
551 BTRFS_FEATURE_INCOMPAT_RAID56 | \
552 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
553 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
554 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
556 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
557 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
558 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
561 * A leaf is full of items. offset and size tell us where to find
562 * the item in the leaf (relative to the start of the data area)
565 struct btrfs_disk_key key;
568 } __attribute__ ((__packed__));
571 * leaves have an item area and a data area:
572 * [item0, item1....itemN] [free space] [dataN...data1, data0]
574 * The data is separate from the items to get the keys closer together
578 struct btrfs_header header;
579 struct btrfs_item items[];
580 } __attribute__ ((__packed__));
583 * all non-leaf blocks are nodes, they hold only keys and pointers to
586 struct btrfs_key_ptr {
587 struct btrfs_disk_key key;
590 } __attribute__ ((__packed__));
593 struct btrfs_header header;
594 struct btrfs_key_ptr ptrs[];
595 } __attribute__ ((__packed__));
598 * btrfs_paths remember the path taken from the root down to the leaf.
599 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
600 * to any other levels that are present.
602 * The slots array records the index of the item or block pointer
603 * used while walking the tree.
605 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
607 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
608 int slots[BTRFS_MAX_LEVEL];
609 /* if there is real range locking, this locks field will change */
610 u8 locks[BTRFS_MAX_LEVEL];
612 /* keep some upper locks as we walk down */
616 * set by btrfs_split_item, tells search_slot to keep all locks
617 * and to force calls to keep space in the nodes
619 unsigned int search_for_split:1;
620 unsigned int keep_locks:1;
621 unsigned int skip_locking:1;
622 unsigned int leave_spinning:1;
623 unsigned int search_commit_root:1;
624 unsigned int need_commit_sem:1;
625 unsigned int skip_release_on_error:1;
629 * items in the extent btree are used to record the objectid of the
630 * owner of the block and the number of references
633 struct btrfs_extent_item {
637 } __attribute__ ((__packed__));
639 struct btrfs_extent_item_v0 {
641 } __attribute__ ((__packed__));
643 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
644 sizeof(struct btrfs_item))
646 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
647 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
649 /* following flags only apply to tree blocks */
651 /* use full backrefs for extent pointers in the block */
652 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
655 * this flag is only used internally by scrub and may be changed at any time
656 * it is only declared here to avoid collisions
658 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
660 struct btrfs_tree_block_info {
661 struct btrfs_disk_key key;
663 } __attribute__ ((__packed__));
665 struct btrfs_extent_data_ref {
670 } __attribute__ ((__packed__));
672 struct btrfs_shared_data_ref {
674 } __attribute__ ((__packed__));
676 struct btrfs_extent_inline_ref {
679 } __attribute__ ((__packed__));
681 /* old style backrefs item */
682 struct btrfs_extent_ref_v0 {
687 } __attribute__ ((__packed__));
690 /* dev extents record free space on individual devices. The owner
691 * field points back to the chunk allocation mapping tree that allocated
692 * the extent. The chunk tree uuid field is a way to double check the owner
694 struct btrfs_dev_extent {
696 __le64 chunk_objectid;
699 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
700 } __attribute__ ((__packed__));
702 struct btrfs_inode_ref {
706 } __attribute__ ((__packed__));
708 struct btrfs_inode_extref {
709 __le64 parent_objectid;
714 } __attribute__ ((__packed__));
716 struct btrfs_timespec {
719 } __attribute__ ((__packed__));
721 enum btrfs_compression_type {
722 BTRFS_COMPRESS_NONE = 0,
723 BTRFS_COMPRESS_ZLIB = 1,
724 BTRFS_COMPRESS_LZO = 2,
725 BTRFS_COMPRESS_TYPES = 2,
726 BTRFS_COMPRESS_LAST = 3,
729 struct btrfs_inode_item {
730 /* nfs style generation number */
732 /* transid that last touched this inode */
744 /* modification sequence number for NFS */
748 * a little future expansion, for more than this we can
749 * just grow the inode item and version it
752 struct btrfs_timespec atime;
753 struct btrfs_timespec ctime;
754 struct btrfs_timespec mtime;
755 struct btrfs_timespec otime;
756 } __attribute__ ((__packed__));
758 struct btrfs_dir_log_item {
760 } __attribute__ ((__packed__));
762 struct btrfs_dir_item {
763 struct btrfs_disk_key location;
768 } __attribute__ ((__packed__));
770 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
773 * Internal in-memory flag that a subvolume has been marked for deletion but
774 * still visible as a directory
776 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
778 struct btrfs_root_item {
779 struct btrfs_inode_item inode;
785 __le64 last_snapshot;
788 struct btrfs_disk_key drop_progress;
793 * The following fields appear after subvol_uuids+subvol_times
798 * This generation number is used to test if the new fields are valid
799 * and up to date while reading the root item. Everytime the root item
800 * is written out, the "generation" field is copied into this field. If
801 * anyone ever mounted the fs with an older kernel, we will have
802 * mismatching generation values here and thus must invalidate the
803 * new fields. See btrfs_update_root and btrfs_find_last_root for
805 * the offset of generation_v2 is also used as the start for the memset
806 * when invalidating the fields.
808 __le64 generation_v2;
809 u8 uuid[BTRFS_UUID_SIZE];
810 u8 parent_uuid[BTRFS_UUID_SIZE];
811 u8 received_uuid[BTRFS_UUID_SIZE];
812 __le64 ctransid; /* updated when an inode changes */
813 __le64 otransid; /* trans when created */
814 __le64 stransid; /* trans when sent. non-zero for received subvol */
815 __le64 rtransid; /* trans when received. non-zero for received subvol */
816 struct btrfs_timespec ctime;
817 struct btrfs_timespec otime;
818 struct btrfs_timespec stime;
819 struct btrfs_timespec rtime;
820 __le64 reserved[8]; /* for future */
821 } __attribute__ ((__packed__));
824 * this is used for both forward and backward root refs
826 struct btrfs_root_ref {
830 } __attribute__ ((__packed__));
832 struct btrfs_disk_balance_args {
834 * profiles to operate on, single is denoted by
835 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
841 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
842 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
855 /* devid subset filter [pstart..pend) */
859 /* btrfs virtual address space subset filter [vstart..vend) */
864 * profile to convert to, single is denoted by
865 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
869 /* BTRFS_BALANCE_ARGS_* */
873 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
874 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
886 * Process chunks that cross stripes_min..stripes_max devices,
887 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
893 } __attribute__ ((__packed__));
896 * store balance parameters to disk so that balance can be properly
897 * resumed after crash or unmount
899 struct btrfs_balance_item {
900 /* BTRFS_BALANCE_* */
903 struct btrfs_disk_balance_args data;
904 struct btrfs_disk_balance_args meta;
905 struct btrfs_disk_balance_args sys;
908 } __attribute__ ((__packed__));
910 #define BTRFS_FILE_EXTENT_INLINE 0
911 #define BTRFS_FILE_EXTENT_REG 1
912 #define BTRFS_FILE_EXTENT_PREALLOC 2
914 struct btrfs_file_extent_item {
916 * transaction id that created this extent
920 * max number of bytes to hold this extent in ram
921 * when we split a compressed extent we can't know how big
922 * each of the resulting pieces will be. So, this is
923 * an upper limit on the size of the extent in ram instead of
929 * 32 bits for the various ways we might encode the data,
930 * including compression and encryption. If any of these
931 * are set to something a given disk format doesn't understand
932 * it is treated like an incompat flag for reading and writing,
937 __le16 other_encoding; /* spare for later use */
939 /* are we inline data or a real extent? */
943 * disk space consumed by the extent, checksum blocks are included
946 * At this offset in the structure, the inline extent data start.
949 __le64 disk_num_bytes;
951 * the logical offset in file blocks (no csums)
952 * this extent record is for. This allows a file extent to point
953 * into the middle of an existing extent on disk, sharing it
954 * between two snapshots (useful if some bytes in the middle of the
955 * extent have changed
959 * the logical number of file blocks (no csums included). This
960 * always reflects the size uncompressed and without encoding.
964 } __attribute__ ((__packed__));
966 struct btrfs_csum_item {
968 } __attribute__ ((__packed__));
970 struct btrfs_dev_stats_item {
972 * grow this item struct at the end for future enhancements and keep
973 * the existing values unchanged
975 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
976 } __attribute__ ((__packed__));
978 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
979 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
980 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
981 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
982 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
983 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
984 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
986 struct btrfs_dev_replace {
987 u64 replace_state; /* see #define above */
988 u64 time_started; /* seconds since 1-Jan-1970 */
989 u64 time_stopped; /* seconds since 1-Jan-1970 */
990 atomic64_t num_write_errors;
991 atomic64_t num_uncorrectable_read_errors;
994 u64 committed_cursor_left;
995 u64 cursor_left_last_write_of_item;
998 u64 cont_reading_from_srcdev_mode; /* see #define above */
1001 int item_needs_writeback;
1002 struct btrfs_device *srcdev;
1003 struct btrfs_device *tgtdev;
1006 atomic_t nesting_level;
1007 struct mutex lock_finishing_cancel_unmount;
1008 struct mutex lock_management_lock;
1011 struct btrfs_scrub_progress scrub_progress;
1014 struct btrfs_dev_replace_item {
1016 * grow this item struct at the end for future enhancements and keep
1017 * the existing values unchanged
1021 __le64 cursor_right;
1022 __le64 cont_reading_from_srcdev_mode;
1024 __le64 replace_state;
1025 __le64 time_started;
1026 __le64 time_stopped;
1027 __le64 num_write_errors;
1028 __le64 num_uncorrectable_read_errors;
1029 } __attribute__ ((__packed__));
1031 /* different types of block groups (and chunks) */
1032 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
1033 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
1034 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
1035 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
1036 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
1037 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
1038 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
1039 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1040 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1041 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1042 BTRFS_SPACE_INFO_GLOBAL_RSV)
1044 enum btrfs_raid_types {
1055 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1056 BTRFS_BLOCK_GROUP_SYSTEM | \
1057 BTRFS_BLOCK_GROUP_METADATA)
1059 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1060 BTRFS_BLOCK_GROUP_RAID1 | \
1061 BTRFS_BLOCK_GROUP_RAID5 | \
1062 BTRFS_BLOCK_GROUP_RAID6 | \
1063 BTRFS_BLOCK_GROUP_DUP | \
1064 BTRFS_BLOCK_GROUP_RAID10)
1065 #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1066 BTRFS_BLOCK_GROUP_RAID6)
1069 * We need a bit for restriper to be able to tell when chunks of type
1070 * SINGLE are available. This "extended" profile format is used in
1071 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1072 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1073 * to avoid remappings between two formats in future.
1075 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1078 * A fake block group type that is used to communicate global block reserve
1079 * size to userspace via the SPACE_INFO ioctl.
1081 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1083 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1084 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1086 static inline u64 chunk_to_extended(u64 flags)
1088 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1089 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1093 static inline u64 extended_to_chunk(u64 flags)
1095 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1098 struct btrfs_block_group_item {
1100 __le64 chunk_objectid;
1102 } __attribute__ ((__packed__));
1104 struct btrfs_free_space_info {
1105 __le32 extent_count;
1107 } __attribute__ ((__packed__));
1109 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1111 #define BTRFS_QGROUP_LEVEL_SHIFT 48
1112 static inline u64 btrfs_qgroup_level(u64 qgroupid)
1114 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1118 * is subvolume quota turned on?
1120 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1122 * RESCAN is set during the initialization phase
1124 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1126 * Some qgroup entries are known to be out of date,
1127 * either because the configuration has changed in a way that
1128 * makes a rescan necessary, or because the fs has been mounted
1129 * with a non-qgroup-aware version.
1130 * Turning qouta off and on again makes it inconsistent, too.
1132 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1134 #define BTRFS_QGROUP_STATUS_VERSION 1
1136 struct btrfs_qgroup_status_item {
1139 * the generation is updated during every commit. As older
1140 * versions of btrfs are not aware of qgroups, it will be
1141 * possible to detect inconsistencies by checking the
1142 * generation on mount time
1146 /* flag definitions see above */
1150 * only used during scanning to record the progress
1151 * of the scan. It contains a logical address
1154 } __attribute__ ((__packed__));
1156 struct btrfs_qgroup_info_item {
1162 } __attribute__ ((__packed__));
1164 /* flags definition for qgroup limits */
1165 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1166 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1167 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1168 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1169 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1170 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1172 struct btrfs_qgroup_limit_item {
1174 * only updated when any of the other values change
1181 } __attribute__ ((__packed__));
1183 /* For raid type sysfs entries */
1184 struct raid_kobject {
1186 struct kobject kobj;
1189 struct btrfs_space_info {
1192 u64 total_bytes; /* total bytes in the space,
1193 this doesn't take mirrors into account */
1194 u64 bytes_used; /* total bytes used,
1195 this doesn't take mirrors into account */
1196 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1197 transaction finishes */
1198 u64 bytes_reserved; /* total bytes the allocator has reserved for
1199 current allocations */
1200 u64 bytes_may_use; /* number of bytes that may be used for
1201 delalloc/allocations */
1202 u64 bytes_readonly; /* total bytes that are read only */
1204 u64 max_extent_size; /* This will hold the maximum extent size of
1205 the space info if we had an ENOSPC in the
1208 unsigned int full:1; /* indicates that we cannot allocate any more
1209 chunks for this space */
1210 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1212 unsigned int flush:1; /* set if we are trying to make space */
1214 unsigned int force_alloc; /* set if we need to force a chunk
1215 alloc for this space */
1217 u64 disk_used; /* total bytes used on disk */
1218 u64 disk_total; /* total bytes on disk, takes mirrors into
1224 * bytes_pinned is kept in line with what is actually pinned, as in
1225 * we've called update_block_group and dropped the bytes_used counter
1226 * and increased the bytes_pinned counter. However this means that
1227 * bytes_pinned does not reflect the bytes that will be pinned once the
1228 * delayed refs are flushed, so this counter is inc'ed everytime we call
1229 * btrfs_free_extent so it is a realtime count of what will be freed
1230 * once the transaction is committed. It will be zero'ed everytime the
1231 * transaction commits.
1233 struct percpu_counter total_bytes_pinned;
1235 struct list_head list;
1236 /* Protected by the spinlock 'lock'. */
1237 struct list_head ro_bgs;
1239 struct rw_semaphore groups_sem;
1240 /* for block groups in our same type */
1241 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1242 wait_queue_head_t wait;
1244 struct kobject kobj;
1245 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1248 #define BTRFS_BLOCK_RSV_GLOBAL 1
1249 #define BTRFS_BLOCK_RSV_DELALLOC 2
1250 #define BTRFS_BLOCK_RSV_TRANS 3
1251 #define BTRFS_BLOCK_RSV_CHUNK 4
1252 #define BTRFS_BLOCK_RSV_DELOPS 5
1253 #define BTRFS_BLOCK_RSV_EMPTY 6
1254 #define BTRFS_BLOCK_RSV_TEMP 7
1256 struct btrfs_block_rsv {
1259 struct btrfs_space_info *space_info;
1261 unsigned short full;
1262 unsigned short type;
1263 unsigned short failfast;
1267 * free clusters are used to claim free space in relatively large chunks,
1268 * allowing us to do less seeky writes. They are used for all metadata
1269 * allocations and data allocations in ssd mode.
1271 struct btrfs_free_cluster {
1273 spinlock_t refill_lock;
1274 struct rb_root root;
1276 /* largest extent in this cluster */
1279 /* first extent starting offset */
1282 /* We did a full search and couldn't create a cluster */
1285 struct btrfs_block_group_cache *block_group;
1287 * when a cluster is allocated from a block group, we put the
1288 * cluster onto a list in the block group so that it can
1289 * be freed before the block group is freed.
1291 struct list_head block_group_list;
1294 enum btrfs_caching_type {
1296 BTRFS_CACHE_STARTED = 1,
1297 BTRFS_CACHE_FAST = 2,
1298 BTRFS_CACHE_FINISHED = 3,
1299 BTRFS_CACHE_ERROR = 4,
1302 enum btrfs_disk_cache_state {
1303 BTRFS_DC_WRITTEN = 0,
1309 struct btrfs_caching_control {
1310 struct list_head list;
1312 wait_queue_head_t wait;
1313 struct btrfs_work work;
1314 struct btrfs_block_group_cache *block_group;
1319 /* Once caching_thread() finds this much free space, it will wake up waiters. */
1320 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
1322 struct btrfs_io_ctl {
1325 struct page **pages;
1326 struct btrfs_root *root;
1327 struct inode *inode;
1333 unsigned check_crcs:1;
1336 struct btrfs_block_group_cache {
1337 struct btrfs_key key;
1338 struct btrfs_block_group_item item;
1339 struct btrfs_fs_info *fs_info;
1340 struct inode *inode;
1347 u64 cache_generation;
1351 * If the free space extent count exceeds this number, convert the block
1354 u32 bitmap_high_thresh;
1357 * If the free space extent count drops below this number, convert the
1358 * block group back to extents.
1360 u32 bitmap_low_thresh;
1363 * It is just used for the delayed data space allocation because
1364 * only the data space allocation and the relative metadata update
1365 * can be done cross the transaction.
1367 struct rw_semaphore data_rwsem;
1369 /* for raid56, this is a full stripe, without parity */
1370 unsigned long full_stripe_len;
1373 unsigned int iref:1;
1374 unsigned int has_caching_ctl:1;
1375 unsigned int removed:1;
1377 int disk_cache_state;
1379 /* cache tracking stuff */
1381 struct btrfs_caching_control *caching_ctl;
1382 u64 last_byte_to_unpin;
1384 struct btrfs_space_info *space_info;
1386 /* free space cache stuff */
1387 struct btrfs_free_space_ctl *free_space_ctl;
1389 /* block group cache stuff */
1390 struct rb_node cache_node;
1392 /* for block groups in the same raid type */
1393 struct list_head list;
1398 /* List of struct btrfs_free_clusters for this block group.
1399 * Today it will only have one thing on it, but that may change
1401 struct list_head cluster_list;
1403 /* For delayed block group creation or deletion of empty block groups */
1404 struct list_head bg_list;
1406 /* For read-only block groups */
1407 struct list_head ro_list;
1411 /* For dirty block groups */
1412 struct list_head dirty_list;
1413 struct list_head io_list;
1415 struct btrfs_io_ctl io_ctl;
1417 /* Lock for free space tree operations. */
1418 struct mutex free_space_lock;
1421 * Does the block group need to be added to the free space tree?
1422 * Protected by free_space_lock.
1424 int needs_free_space;
1427 /* delayed seq elem */
1429 struct list_head list;
1433 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1435 enum btrfs_orphan_cleanup_state {
1436 ORPHAN_CLEANUP_STARTED = 1,
1437 ORPHAN_CLEANUP_DONE = 2,
1440 /* used by the raid56 code to lock stripes for read/modify/write */
1441 struct btrfs_stripe_hash {
1442 struct list_head hash_list;
1443 wait_queue_head_t wait;
1447 /* used by the raid56 code to lock stripes for read/modify/write */
1448 struct btrfs_stripe_hash_table {
1449 struct list_head stripe_cache;
1450 spinlock_t cache_lock;
1452 struct btrfs_stripe_hash table[];
1455 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1457 void btrfs_init_async_reclaim_work(struct work_struct *work);
1460 struct reloc_control;
1461 struct btrfs_device;
1462 struct btrfs_fs_devices;
1463 struct btrfs_balance_control;
1464 struct btrfs_delayed_root;
1465 struct btrfs_fs_info {
1466 u8 fsid[BTRFS_FSID_SIZE];
1467 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1468 struct btrfs_root *extent_root;
1469 struct btrfs_root *tree_root;
1470 struct btrfs_root *chunk_root;
1471 struct btrfs_root *dev_root;
1472 struct btrfs_root *fs_root;
1473 struct btrfs_root *csum_root;
1474 struct btrfs_root *quota_root;
1475 struct btrfs_root *uuid_root;
1476 struct btrfs_root *free_space_root;
1478 /* the log root tree is a directory of all the other log roots */
1479 struct btrfs_root *log_root_tree;
1481 spinlock_t fs_roots_radix_lock;
1482 struct radix_tree_root fs_roots_radix;
1484 /* block group cache stuff */
1485 spinlock_t block_group_cache_lock;
1486 u64 first_logical_byte;
1487 struct rb_root block_group_cache_tree;
1489 /* keep track of unallocated space */
1490 spinlock_t free_chunk_lock;
1491 u64 free_chunk_space;
1493 struct extent_io_tree freed_extents[2];
1494 struct extent_io_tree *pinned_extents;
1496 /* logical->physical extent mapping */
1497 struct btrfs_mapping_tree mapping_tree;
1500 * block reservation for extent, checksum, root tree and
1501 * delayed dir index item
1503 struct btrfs_block_rsv global_block_rsv;
1504 /* block reservation for delay allocation */
1505 struct btrfs_block_rsv delalloc_block_rsv;
1506 /* block reservation for metadata operations */
1507 struct btrfs_block_rsv trans_block_rsv;
1508 /* block reservation for chunk tree */
1509 struct btrfs_block_rsv chunk_block_rsv;
1510 /* block reservation for delayed operations */
1511 struct btrfs_block_rsv delayed_block_rsv;
1513 struct btrfs_block_rsv empty_block_rsv;
1516 u64 last_trans_committed;
1517 u64 avg_delayed_ref_runtime;
1520 * this is updated to the current trans every time a full commit
1521 * is required instead of the faster short fsync log commits
1523 u64 last_trans_log_full_commit;
1524 unsigned long mount_opt;
1526 * Track requests for actions that need to be done during transaction
1527 * commit (like for some mount options).
1529 unsigned long pending_changes;
1530 unsigned long compress_type:4;
1531 int commit_interval;
1533 * It is a suggestive number, the read side is safe even it gets a
1534 * wrong number because we will write out the data into a regular
1535 * extent. The write side(mount/remount) is under ->s_umount lock,
1536 * so it is also safe.
1540 * Protected by ->chunk_mutex and sb->s_umount.
1542 * The reason that we use two lock to protect it is because only
1543 * remount and mount operations can change it and these two operations
1544 * are under sb->s_umount, but the read side (chunk allocation) can not
1545 * acquire sb->s_umount or the deadlock would happen. So we use two
1546 * locks to protect it. On the write side, we must acquire two locks,
1547 * and on the read side, we just need acquire one of them.
1550 struct btrfs_transaction *running_transaction;
1551 wait_queue_head_t transaction_throttle;
1552 wait_queue_head_t transaction_wait;
1553 wait_queue_head_t transaction_blocked_wait;
1554 wait_queue_head_t async_submit_wait;
1557 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1558 * when they are updated.
1560 * Because we do not clear the flags for ever, so we needn't use
1561 * the lock on the read side.
1563 * We also needn't use the lock when we mount the fs, because
1564 * there is no other task which will update the flag.
1566 spinlock_t super_lock;
1567 struct btrfs_super_block *super_copy;
1568 struct btrfs_super_block *super_for_commit;
1569 struct block_device *__bdev;
1570 struct super_block *sb;
1571 struct inode *btree_inode;
1572 struct backing_dev_info bdi;
1573 struct mutex tree_log_mutex;
1574 struct mutex transaction_kthread_mutex;
1575 struct mutex cleaner_mutex;
1576 struct mutex chunk_mutex;
1577 struct mutex volume_mutex;
1580 * this is taken to make sure we don't set block groups ro after
1581 * the free space cache has been allocated on them
1583 struct mutex ro_block_group_mutex;
1585 /* this is used during read/modify/write to make sure
1586 * no two ios are trying to mod the same stripe at the same
1589 struct btrfs_stripe_hash_table *stripe_hash_table;
1592 * this protects the ordered operations list only while we are
1593 * processing all of the entries on it. This way we make
1594 * sure the commit code doesn't find the list temporarily empty
1595 * because another function happens to be doing non-waiting preflush
1596 * before jumping into the main commit.
1598 struct mutex ordered_operations_mutex;
1600 struct rw_semaphore commit_root_sem;
1602 struct rw_semaphore cleanup_work_sem;
1604 struct rw_semaphore subvol_sem;
1605 struct srcu_struct subvol_srcu;
1607 spinlock_t trans_lock;
1609 * the reloc mutex goes with the trans lock, it is taken
1610 * during commit to protect us from the relocation code
1612 struct mutex reloc_mutex;
1614 struct list_head trans_list;
1615 struct list_head dead_roots;
1616 struct list_head caching_block_groups;
1618 spinlock_t delayed_iput_lock;
1619 struct list_head delayed_iputs;
1620 struct mutex cleaner_delayed_iput_mutex;
1622 /* this protects tree_mod_seq_list */
1623 spinlock_t tree_mod_seq_lock;
1624 atomic64_t tree_mod_seq;
1625 struct list_head tree_mod_seq_list;
1627 /* this protects tree_mod_log */
1628 rwlock_t tree_mod_log_lock;
1629 struct rb_root tree_mod_log;
1631 atomic_t nr_async_submits;
1632 atomic_t async_submit_draining;
1633 atomic_t nr_async_bios;
1634 atomic_t async_delalloc_pages;
1635 atomic_t open_ioctl_trans;
1638 * this is used to protect the following list -- ordered_roots.
1640 spinlock_t ordered_root_lock;
1643 * all fs/file tree roots in which there are data=ordered extents
1644 * pending writeback are added into this list.
1646 * these can span multiple transactions and basically include
1647 * every dirty data page that isn't from nodatacow
1649 struct list_head ordered_roots;
1651 struct mutex delalloc_root_mutex;
1652 spinlock_t delalloc_root_lock;
1653 /* all fs/file tree roots that have delalloc inodes. */
1654 struct list_head delalloc_roots;
1657 * there is a pool of worker threads for checksumming during writes
1658 * and a pool for checksumming after reads. This is because readers
1659 * can run with FS locks held, and the writers may be waiting for
1660 * those locks. We don't want ordering in the pending list to cause
1661 * deadlocks, and so the two are serviced separately.
1663 * A third pool does submit_bio to avoid deadlocking with the other
1666 struct btrfs_workqueue *workers;
1667 struct btrfs_workqueue *delalloc_workers;
1668 struct btrfs_workqueue *flush_workers;
1669 struct btrfs_workqueue *endio_workers;
1670 struct btrfs_workqueue *endio_meta_workers;
1671 struct btrfs_workqueue *endio_raid56_workers;
1672 struct btrfs_workqueue *endio_repair_workers;
1673 struct btrfs_workqueue *rmw_workers;
1674 struct btrfs_workqueue *endio_meta_write_workers;
1675 struct btrfs_workqueue *endio_write_workers;
1676 struct btrfs_workqueue *endio_freespace_worker;
1677 struct btrfs_workqueue *submit_workers;
1678 struct btrfs_workqueue *caching_workers;
1679 struct btrfs_workqueue *readahead_workers;
1682 * fixup workers take dirty pages that didn't properly go through
1683 * the cow mechanism and make them safe to write. It happens
1684 * for the sys_munmap function call path
1686 struct btrfs_workqueue *fixup_workers;
1687 struct btrfs_workqueue *delayed_workers;
1689 /* the extent workers do delayed refs on the extent allocation tree */
1690 struct btrfs_workqueue *extent_workers;
1691 struct task_struct *transaction_kthread;
1692 struct task_struct *cleaner_kthread;
1693 int thread_pool_size;
1695 struct kobject *space_info_kobj;
1698 int log_root_recovering;
1703 /* used to keep from writing metadata until there is a nice batch */
1704 struct percpu_counter dirty_metadata_bytes;
1705 struct percpu_counter delalloc_bytes;
1706 s32 dirty_metadata_batch;
1709 struct list_head dirty_cowonly_roots;
1711 struct btrfs_fs_devices *fs_devices;
1714 * the space_info list is almost entirely read only. It only changes
1715 * when we add a new raid type to the FS, and that happens
1716 * very rarely. RCU is used to protect it.
1718 struct list_head space_info;
1720 struct btrfs_space_info *data_sinfo;
1722 struct reloc_control *reloc_ctl;
1724 /* data_alloc_cluster is only used in ssd mode */
1725 struct btrfs_free_cluster data_alloc_cluster;
1727 /* all metadata allocations go through this cluster */
1728 struct btrfs_free_cluster meta_alloc_cluster;
1730 /* auto defrag inodes go here */
1731 spinlock_t defrag_inodes_lock;
1732 struct rb_root defrag_inodes;
1733 atomic_t defrag_running;
1735 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1736 seqlock_t profiles_lock;
1738 * these three are in extended format (availability of single
1739 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1740 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1742 u64 avail_data_alloc_bits;
1743 u64 avail_metadata_alloc_bits;
1744 u64 avail_system_alloc_bits;
1746 /* restriper state */
1747 spinlock_t balance_lock;
1748 struct mutex balance_mutex;
1749 atomic_t balance_running;
1750 atomic_t balance_pause_req;
1751 atomic_t balance_cancel_req;
1752 struct btrfs_balance_control *balance_ctl;
1753 wait_queue_head_t balance_wait_q;
1755 unsigned data_chunk_allocations;
1756 unsigned metadata_ratio;
1760 /* private scrub information */
1761 struct mutex scrub_lock;
1762 atomic_t scrubs_running;
1763 atomic_t scrub_pause_req;
1764 atomic_t scrubs_paused;
1765 atomic_t scrub_cancel_req;
1766 wait_queue_head_t scrub_pause_wait;
1767 int scrub_workers_refcnt;
1768 struct btrfs_workqueue *scrub_workers;
1769 struct btrfs_workqueue *scrub_wr_completion_workers;
1770 struct btrfs_workqueue *scrub_nocow_workers;
1771 struct btrfs_workqueue *scrub_parity_workers;
1773 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1774 u32 check_integrity_print_mask;
1779 unsigned int quota_enabled:1;
1782 * quota_enabled only changes state after a commit. This holds the
1785 unsigned int pending_quota_state:1;
1787 /* is qgroup tracking in a consistent state? */
1790 /* holds configuration and tracking. Protected by qgroup_lock */
1791 struct rb_root qgroup_tree;
1792 struct rb_root qgroup_op_tree;
1793 spinlock_t qgroup_lock;
1794 spinlock_t qgroup_op_lock;
1795 atomic_t qgroup_op_seq;
1798 * used to avoid frequently calling ulist_alloc()/ulist_free()
1799 * when doing qgroup accounting, it must be protected by qgroup_lock.
1801 struct ulist *qgroup_ulist;
1803 /* protect user change for quota operations */
1804 struct mutex qgroup_ioctl_lock;
1806 /* list of dirty qgroups to be written at next commit */
1807 struct list_head dirty_qgroups;
1809 /* used by qgroup for an efficient tree traversal */
1812 /* qgroup rescan items */
1813 struct mutex qgroup_rescan_lock; /* protects the progress item */
1814 struct btrfs_key qgroup_rescan_progress;
1815 struct btrfs_workqueue *qgroup_rescan_workers;
1816 struct completion qgroup_rescan_completion;
1817 struct btrfs_work qgroup_rescan_work;
1819 /* filesystem state */
1820 unsigned long fs_state;
1822 struct btrfs_delayed_root *delayed_root;
1824 /* readahead tree */
1825 spinlock_t reada_lock;
1826 struct radix_tree_root reada_tree;
1828 /* readahead works cnt */
1829 atomic_t reada_works_cnt;
1831 /* Extent buffer radix tree */
1832 spinlock_t buffer_lock;
1833 struct radix_tree_root buffer_radix;
1835 /* next backup root to be overwritten */
1836 int backup_root_index;
1838 int num_tolerated_disk_barrier_failures;
1840 /* device replace state */
1841 struct btrfs_dev_replace dev_replace;
1843 atomic_t mutually_exclusive_operation_running;
1845 struct percpu_counter bio_counter;
1846 wait_queue_head_t replace_wait;
1848 struct semaphore uuid_tree_rescan_sem;
1849 unsigned int update_uuid_tree_gen:1;
1851 /* Used to reclaim the metadata space in the background. */
1852 struct work_struct async_reclaim_work;
1854 spinlock_t unused_bgs_lock;
1855 struct list_head unused_bgs;
1856 struct mutex unused_bg_unpin_mutex;
1857 struct mutex delete_unused_bgs_mutex;
1859 /* For btrfs to record security options */
1860 struct security_mnt_opts security_opts;
1863 * Chunks that can't be freed yet (under a trim/discard operation)
1864 * and will be latter freed. Protected by fs_info->chunk_mutex.
1866 struct list_head pinned_chunks;
1868 int creating_free_space_tree;
1871 struct btrfs_subvolume_writers {
1872 struct percpu_counter counter;
1873 wait_queue_head_t wait;
1877 * The state of btrfs root
1880 * btrfs_record_root_in_trans is a multi-step process,
1881 * and it can race with the balancing code. But the
1882 * race is very small, and only the first time the root
1883 * is added to each transaction. So IN_TRANS_SETUP
1884 * is used to tell us when more checks are required
1886 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1887 #define BTRFS_ROOT_REF_COWS 1
1888 #define BTRFS_ROOT_TRACK_DIRTY 2
1889 #define BTRFS_ROOT_IN_RADIX 3
1890 #define BTRFS_ROOT_DUMMY_ROOT 4
1891 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1892 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1893 #define BTRFS_ROOT_FORCE_COW 7
1894 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1895 #define BTRFS_ROOT_DIRTY 9
1898 * in ram representation of the tree. extent_root is used for all allocations
1899 * and for the extent tree extent_root root.
1902 struct extent_buffer *node;
1904 struct extent_buffer *commit_root;
1905 struct btrfs_root *log_root;
1906 struct btrfs_root *reloc_root;
1908 unsigned long state;
1909 struct btrfs_root_item root_item;
1910 struct btrfs_key root_key;
1911 struct btrfs_fs_info *fs_info;
1912 struct extent_io_tree dirty_log_pages;
1914 struct mutex objectid_mutex;
1916 spinlock_t accounting_lock;
1917 struct btrfs_block_rsv *block_rsv;
1919 /* free ino cache stuff */
1920 struct btrfs_free_space_ctl *free_ino_ctl;
1921 enum btrfs_caching_type ino_cache_state;
1922 spinlock_t ino_cache_lock;
1923 wait_queue_head_t ino_cache_wait;
1924 struct btrfs_free_space_ctl *free_ino_pinned;
1925 u64 ino_cache_progress;
1926 struct inode *ino_cache_inode;
1928 struct mutex log_mutex;
1929 wait_queue_head_t log_writer_wait;
1930 wait_queue_head_t log_commit_wait[2];
1931 struct list_head log_ctxs[2];
1932 atomic_t log_writers;
1933 atomic_t log_commit[2];
1936 /* No matter the commit succeeds or not*/
1937 int log_transid_committed;
1938 /* Just be updated when the commit succeeds. */
1939 int last_log_commit;
1940 pid_t log_start_pid;
1945 /* data allocations are done in sectorsize units */
1948 /* node allocations are done in nodesize units */
1955 u64 highest_objectid;
1957 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1960 u64 defrag_trans_start;
1961 struct btrfs_key defrag_progress;
1962 struct btrfs_key defrag_max;
1965 /* the dirty list is only used by non-reference counted roots */
1966 struct list_head dirty_list;
1968 struct list_head root_list;
1970 spinlock_t log_extents_lock[2];
1971 struct list_head logged_list[2];
1973 spinlock_t orphan_lock;
1974 atomic_t orphan_inodes;
1975 struct btrfs_block_rsv *orphan_block_rsv;
1976 int orphan_cleanup_state;
1978 spinlock_t inode_lock;
1979 /* red-black tree that keeps track of in-memory inodes */
1980 struct rb_root inode_tree;
1983 * radix tree that keeps track of delayed nodes of every inode,
1984 * protected by inode_lock
1986 struct radix_tree_root delayed_nodes_tree;
1988 * right now this just gets used so that a root has its own devid
1989 * for stat. It may be used for more later
1993 spinlock_t root_item_lock;
1996 struct mutex delalloc_mutex;
1997 spinlock_t delalloc_lock;
1999 * all of the inodes that have delalloc bytes. It is possible for
2000 * this list to be empty even when there is still dirty data=ordered
2001 * extents waiting to finish IO.
2003 struct list_head delalloc_inodes;
2004 struct list_head delalloc_root;
2005 u64 nr_delalloc_inodes;
2007 struct mutex ordered_extent_mutex;
2009 * this is used by the balancing code to wait for all the pending
2012 spinlock_t ordered_extent_lock;
2015 * all of the data=ordered extents pending writeback
2016 * these can span multiple transactions and basically include
2017 * every dirty data page that isn't from nodatacow
2019 struct list_head ordered_extents;
2020 struct list_head ordered_root;
2021 u64 nr_ordered_extents;
2024 * Number of currently running SEND ioctls to prevent
2025 * manipulation with the read-only status via SUBVOL_SETFLAGS
2027 int send_in_progress;
2028 struct btrfs_subvolume_writers *subv_writers;
2029 atomic_t will_be_snapshoted;
2031 /* For qgroup metadata space reserve */
2032 atomic_t qgroup_meta_rsv;
2035 struct btrfs_ioctl_defrag_range_args {
2036 /* start of the defrag operation */
2039 /* number of bytes to defrag, use (u64)-1 to say all */
2043 * flags for the operation, which can include turning
2044 * on compression for this one defrag
2049 * any extent bigger than this will be considered
2050 * already defragged. Use 0 to take the kernel default
2051 * Use 1 to say every single extent must be rewritten
2053 __u32 extent_thresh;
2056 * which compression method to use if turning on compression
2057 * for this defrag operation. If unspecified, zlib will
2060 __u32 compress_type;
2062 /* spare for later */
2068 * inode items have the data typically returned from stat and store other
2069 * info about object characteristics. There is one for every file and dir in
2072 #define BTRFS_INODE_ITEM_KEY 1
2073 #define BTRFS_INODE_REF_KEY 12
2074 #define BTRFS_INODE_EXTREF_KEY 13
2075 #define BTRFS_XATTR_ITEM_KEY 24
2076 #define BTRFS_ORPHAN_ITEM_KEY 48
2077 /* reserve 2-15 close to the inode for later flexibility */
2080 * dir items are the name -> inode pointers in a directory. There is one
2081 * for every name in a directory.
2083 #define BTRFS_DIR_LOG_ITEM_KEY 60
2084 #define BTRFS_DIR_LOG_INDEX_KEY 72
2085 #define BTRFS_DIR_ITEM_KEY 84
2086 #define BTRFS_DIR_INDEX_KEY 96
2088 * extent data is for file data
2090 #define BTRFS_EXTENT_DATA_KEY 108
2093 * extent csums are stored in a separate tree and hold csums for
2094 * an entire extent on disk.
2096 #define BTRFS_EXTENT_CSUM_KEY 128
2099 * root items point to tree roots. They are typically in the root
2100 * tree used by the super block to find all the other trees
2102 #define BTRFS_ROOT_ITEM_KEY 132
2105 * root backrefs tie subvols and snapshots to the directory entries that
2108 #define BTRFS_ROOT_BACKREF_KEY 144
2111 * root refs make a fast index for listing all of the snapshots and
2112 * subvolumes referenced by a given root. They point directly to the
2113 * directory item in the root that references the subvol
2115 #define BTRFS_ROOT_REF_KEY 156
2118 * extent items are in the extent map tree. These record which blocks
2119 * are used, and how many references there are to each block
2121 #define BTRFS_EXTENT_ITEM_KEY 168
2124 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2125 * the length, so we save the level in key->offset instead of the length.
2127 #define BTRFS_METADATA_ITEM_KEY 169
2129 #define BTRFS_TREE_BLOCK_REF_KEY 176
2131 #define BTRFS_EXTENT_DATA_REF_KEY 178
2133 #define BTRFS_EXTENT_REF_V0_KEY 180
2135 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2137 #define BTRFS_SHARED_DATA_REF_KEY 184
2140 * block groups give us hints into the extent allocation trees. Which
2141 * blocks are free etc etc
2143 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2146 * Every block group is represented in the free space tree by a free space info
2147 * item, which stores some accounting information. It is keyed on
2148 * (block_group_start, FREE_SPACE_INFO, block_group_length).
2150 #define BTRFS_FREE_SPACE_INFO_KEY 198
2153 * A free space extent tracks an extent of space that is free in a block group.
2154 * It is keyed on (start, FREE_SPACE_EXTENT, length).
2156 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
2159 * When a block group becomes very fragmented, we convert it to use bitmaps
2160 * instead of extents. A free space bitmap is keyed on
2161 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
2162 * (length / sectorsize) bits.
2164 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
2166 #define BTRFS_DEV_EXTENT_KEY 204
2167 #define BTRFS_DEV_ITEM_KEY 216
2168 #define BTRFS_CHUNK_ITEM_KEY 228
2171 * Records the overall state of the qgroups.
2172 * There's only one instance of this key present,
2173 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2175 #define BTRFS_QGROUP_STATUS_KEY 240
2177 * Records the currently used space of the qgroup.
2178 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2180 #define BTRFS_QGROUP_INFO_KEY 242
2182 * Contains the user configured limits for the qgroup.
2183 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2185 #define BTRFS_QGROUP_LIMIT_KEY 244
2187 * Records the child-parent relationship of qgroups. For
2188 * each relation, 2 keys are present:
2189 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2190 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2192 #define BTRFS_QGROUP_RELATION_KEY 246
2195 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
2197 #define BTRFS_BALANCE_ITEM_KEY 248
2200 * The key type for tree items that are stored persistently, but do not need to
2201 * exist for extended period of time. The items can exist in any tree.
2203 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
2207 * - balance status item
2208 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
2210 #define BTRFS_TEMPORARY_ITEM_KEY 248
2213 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
2215 #define BTRFS_DEV_STATS_KEY 249
2218 * The key type for tree items that are stored persistently and usually exist
2219 * for a long period, eg. filesystem lifetime. The item kinds can be status
2220 * information, stats or preference values. The item can exist in any tree.
2222 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
2226 * - device statistics, store IO stats in the device tree, one key for all
2228 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
2230 #define BTRFS_PERSISTENT_ITEM_KEY 249
2233 * Persistantly stores the device replace state in the device tree.
2234 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2236 #define BTRFS_DEV_REPLACE_KEY 250
2239 * Stores items that allow to quickly map UUIDs to something else.
2240 * These items are part of the filesystem UUID tree.
2241 * The key is built like this:
2242 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2244 #if BTRFS_UUID_SIZE != 16
2245 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2247 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2248 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2249 * received subvols */
2252 * string items are for debugging. They just store a short string of
2255 #define BTRFS_STRING_ITEM_KEY 253
2258 * Flags for mount options.
2260 * Note: don't forget to add new options to btrfs_show_options()
2262 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2263 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2264 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2265 #define BTRFS_MOUNT_SSD (1 << 3)
2266 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2267 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2268 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2269 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2270 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2271 #define BTRFS_MOUNT_NOSSD (1 << 9)
2272 #define BTRFS_MOUNT_DISCARD (1 << 10)
2273 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2274 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2275 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2276 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2277 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2278 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2279 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2280 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
2281 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2282 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2283 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2284 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2285 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2286 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
2287 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
2288 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
2289 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
2291 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2292 #define BTRFS_DEFAULT_MAX_INLINE (8192)
2294 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2295 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2296 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2297 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2300 #define btrfs_set_and_info(root, opt, fmt, args...) \
2302 if (!btrfs_test_opt(root, opt)) \
2303 btrfs_info(root->fs_info, fmt, ##args); \
2304 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2307 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2309 if (btrfs_test_opt(root, opt)) \
2310 btrfs_info(root->fs_info, fmt, ##args); \
2311 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2314 #ifdef CONFIG_BTRFS_DEBUG
2316 btrfs_should_fragment_free_space(struct btrfs_root *root,
2317 struct btrfs_block_group_cache *block_group)
2319 return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
2320 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
2321 (btrfs_test_opt(root, FRAGMENT_DATA) &&
2322 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
2327 * Requests for changes that need to be done during transaction commit.
2329 * Internal mount options that are used for special handling of the real
2330 * mount options (eg. cannot be set during remount and have to be set during
2331 * transaction commit)
2334 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2335 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2336 #define BTRFS_PENDING_COMMIT (2)
2338 #define btrfs_test_pending(info, opt) \
2339 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2340 #define btrfs_set_pending(info, opt) \
2341 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2342 #define btrfs_clear_pending(info, opt) \
2343 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2346 * Helpers for setting pending mount option changes.
2348 * Expects corresponding macros
2349 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2351 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2353 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2354 btrfs_info((info), fmt, ##args); \
2355 btrfs_set_pending((info), SET_##opt); \
2356 btrfs_clear_pending((info), CLEAR_##opt); \
2360 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2362 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2363 btrfs_info((info), fmt, ##args); \
2364 btrfs_set_pending((info), CLEAR_##opt); \
2365 btrfs_clear_pending((info), SET_##opt); \
2372 #define BTRFS_INODE_NODATASUM (1 << 0)
2373 #define BTRFS_INODE_NODATACOW (1 << 1)
2374 #define BTRFS_INODE_READONLY (1 << 2)
2375 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2376 #define BTRFS_INODE_PREALLOC (1 << 4)
2377 #define BTRFS_INODE_SYNC (1 << 5)
2378 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2379 #define BTRFS_INODE_APPEND (1 << 7)
2380 #define BTRFS_INODE_NODUMP (1 << 8)
2381 #define BTRFS_INODE_NOATIME (1 << 9)
2382 #define BTRFS_INODE_DIRSYNC (1 << 10)
2383 #define BTRFS_INODE_COMPRESS (1 << 11)
2385 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2387 struct btrfs_map_token {
2388 struct extent_buffer *eb;
2390 unsigned long offset;
2393 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
2394 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
2396 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2398 token->kaddr = NULL;
2401 /* some macros to generate set/get funcs for the struct fields. This
2402 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2405 #define le8_to_cpu(v) (v)
2406 #define cpu_to_le8(v) (v)
2409 #define read_eb_member(eb, ptr, type, member, result) ( \
2410 read_extent_buffer(eb, (char *)(result), \
2411 ((unsigned long)(ptr)) + \
2412 offsetof(type, member), \
2413 sizeof(((type *)0)->member)))
2415 #define write_eb_member(eb, ptr, type, member, result) ( \
2416 write_extent_buffer(eb, (char *)(result), \
2417 ((unsigned long)(ptr)) + \
2418 offsetof(type, member), \
2419 sizeof(((type *)0)->member)))
2421 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2422 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2423 unsigned long off, \
2424 struct btrfs_map_token *token); \
2425 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2426 unsigned long off, u##bits val, \
2427 struct btrfs_map_token *token); \
2428 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2429 unsigned long off) \
2431 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2433 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2434 unsigned long off, u##bits val) \
2436 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2439 DECLARE_BTRFS_SETGET_BITS(8)
2440 DECLARE_BTRFS_SETGET_BITS(16)
2441 DECLARE_BTRFS_SETGET_BITS(32)
2442 DECLARE_BTRFS_SETGET_BITS(64)
2444 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2445 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2447 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2448 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2450 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2453 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2454 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2456 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2457 struct btrfs_map_token *token) \
2459 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2460 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2462 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2463 type *s, u##bits val, \
2464 struct btrfs_map_token *token) \
2466 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2467 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2470 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2471 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2473 type *p = page_address(eb->pages[0]); \
2474 u##bits res = le##bits##_to_cpu(p->member); \
2477 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2480 type *p = page_address(eb->pages[0]); \
2481 p->member = cpu_to_le##bits(val); \
2484 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2485 static inline u##bits btrfs_##name(type *s) \
2487 return le##bits##_to_cpu(s->member); \
2489 static inline void btrfs_set_##name(type *s, u##bits val) \
2491 s->member = cpu_to_le##bits(val); \
2494 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2495 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2496 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2497 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2498 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2499 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2501 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2502 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2503 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2504 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2505 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2506 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2508 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2509 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2511 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2513 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2515 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2517 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2519 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2520 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2522 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2524 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2526 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2529 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2531 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2534 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2536 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2539 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2540 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2541 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2542 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2543 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2544 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2545 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2546 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2547 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2548 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2549 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2551 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2553 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2556 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2557 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2558 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2560 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2564 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2566 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2567 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2569 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2571 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2572 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2574 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2577 unsigned long offset = (unsigned long)c;
2578 offset += offsetof(struct btrfs_chunk, stripe);
2579 offset += nr * sizeof(struct btrfs_stripe);
2580 return (struct btrfs_stripe *)offset;
2583 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2585 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2588 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2589 struct btrfs_chunk *c, int nr)
2591 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2594 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2595 struct btrfs_chunk *c, int nr)
2597 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2600 /* struct btrfs_block_group_item */
2601 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2603 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2605 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2606 struct btrfs_block_group_item, chunk_objectid, 64);
2608 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2609 struct btrfs_block_group_item, chunk_objectid, 64);
2610 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2611 struct btrfs_block_group_item, flags, 64);
2612 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2613 struct btrfs_block_group_item, flags, 64);
2615 /* struct btrfs_free_space_info */
2616 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
2618 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
2620 /* struct btrfs_inode_ref */
2621 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2622 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2624 /* struct btrfs_inode_extref */
2625 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2626 parent_objectid, 64);
2627 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2629 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2631 /* struct btrfs_inode_item */
2632 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2633 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2634 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2635 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2636 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2637 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2638 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2639 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2640 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2641 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2642 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2643 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2644 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2646 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2648 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2650 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2651 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2653 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2655 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2656 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2657 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2658 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2659 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2660 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2661 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2662 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2663 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2664 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2666 /* struct btrfs_dev_extent */
2667 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2669 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2670 chunk_objectid, 64);
2671 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2673 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2675 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2677 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2678 return (unsigned long)dev + ptr;
2681 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2682 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2684 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2686 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2689 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2691 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2692 struct btrfs_tree_block_info *item,
2693 struct btrfs_disk_key *key)
2695 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2698 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2699 struct btrfs_tree_block_info *item,
2700 struct btrfs_disk_key *key)
2702 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2705 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2707 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2709 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2711 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2714 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2717 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2719 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2722 static inline u32 btrfs_extent_inline_ref_size(int type)
2724 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2725 type == BTRFS_SHARED_BLOCK_REF_KEY)
2726 return sizeof(struct btrfs_extent_inline_ref);
2727 if (type == BTRFS_SHARED_DATA_REF_KEY)
2728 return sizeof(struct btrfs_shared_data_ref) +
2729 sizeof(struct btrfs_extent_inline_ref);
2730 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2731 return sizeof(struct btrfs_extent_data_ref) +
2732 offsetof(struct btrfs_extent_inline_ref, offset);
2737 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2738 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2740 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2741 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2743 /* struct btrfs_node */
2744 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2745 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2746 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2748 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2751 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2754 ptr = offsetof(struct btrfs_node, ptrs) +
2755 sizeof(struct btrfs_key_ptr) * nr;
2756 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2759 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2763 ptr = offsetof(struct btrfs_node, ptrs) +
2764 sizeof(struct btrfs_key_ptr) * nr;
2765 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2768 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2771 ptr = offsetof(struct btrfs_node, ptrs) +
2772 sizeof(struct btrfs_key_ptr) * nr;
2773 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2776 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2780 ptr = offsetof(struct btrfs_node, ptrs) +
2781 sizeof(struct btrfs_key_ptr) * nr;
2782 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2785 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2787 return offsetof(struct btrfs_node, ptrs) +
2788 sizeof(struct btrfs_key_ptr) * nr;
2791 void btrfs_node_key(struct extent_buffer *eb,
2792 struct btrfs_disk_key *disk_key, int nr);
2794 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2795 struct btrfs_disk_key *disk_key, int nr)
2798 ptr = btrfs_node_key_ptr_offset(nr);
2799 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2800 struct btrfs_key_ptr, key, disk_key);
2803 /* struct btrfs_item */
2804 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2805 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2806 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2807 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2809 static inline unsigned long btrfs_item_nr_offset(int nr)
2811 return offsetof(struct btrfs_leaf, items) +
2812 sizeof(struct btrfs_item) * nr;
2815 static inline struct btrfs_item *btrfs_item_nr(int nr)
2817 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2820 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2821 struct btrfs_item *item)
2823 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2826 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2828 return btrfs_item_end(eb, btrfs_item_nr(nr));
2831 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2833 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2836 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2838 return btrfs_item_size(eb, btrfs_item_nr(nr));
2841 static inline void btrfs_item_key(struct extent_buffer *eb,
2842 struct btrfs_disk_key *disk_key, int nr)
2844 struct btrfs_item *item = btrfs_item_nr(nr);
2845 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2848 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2849 struct btrfs_disk_key *disk_key, int nr)
2851 struct btrfs_item *item = btrfs_item_nr(nr);
2852 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2855 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2858 * struct btrfs_root_ref
2860 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2861 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2862 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2864 /* struct btrfs_dir_item */
2865 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2866 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2867 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2868 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2869 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2870 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2872 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2874 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2877 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2878 struct btrfs_dir_item *item,
2879 struct btrfs_disk_key *key)
2881 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2884 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2885 struct btrfs_dir_item *item,
2886 struct btrfs_disk_key *key)
2888 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2891 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2893 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2895 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2898 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2899 struct btrfs_free_space_header *h,
2900 struct btrfs_disk_key *key)
2902 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2905 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2906 struct btrfs_free_space_header *h,
2907 struct btrfs_disk_key *key)
2909 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2912 /* struct btrfs_disk_key */
2913 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2915 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2916 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2918 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2919 struct btrfs_disk_key *disk)
2921 cpu->offset = le64_to_cpu(disk->offset);
2922 cpu->type = disk->type;
2923 cpu->objectid = le64_to_cpu(disk->objectid);
2926 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2927 struct btrfs_key *cpu)
2929 disk->offset = cpu_to_le64(cpu->offset);
2930 disk->type = cpu->type;
2931 disk->objectid = cpu_to_le64(cpu->objectid);
2934 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2935 struct btrfs_key *key, int nr)
2937 struct btrfs_disk_key disk_key;
2938 btrfs_node_key(eb, &disk_key, nr);
2939 btrfs_disk_key_to_cpu(key, &disk_key);
2942 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2943 struct btrfs_key *key, int nr)
2945 struct btrfs_disk_key disk_key;
2946 btrfs_item_key(eb, &disk_key, nr);
2947 btrfs_disk_key_to_cpu(key, &disk_key);
2950 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2951 struct btrfs_dir_item *item,
2952 struct btrfs_key *key)
2954 struct btrfs_disk_key disk_key;
2955 btrfs_dir_item_key(eb, item, &disk_key);
2956 btrfs_disk_key_to_cpu(key, &disk_key);
2960 static inline u8 btrfs_key_type(struct btrfs_key *key)
2965 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2970 /* struct btrfs_header */
2971 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2972 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2974 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2975 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2976 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2977 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2978 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2980 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2981 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2983 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2985 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2987 return (btrfs_header_flags(eb) & flag) == flag;
2990 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2992 u64 flags = btrfs_header_flags(eb);
2993 btrfs_set_header_flags(eb, flags | flag);
2994 return (flags & flag) == flag;
2997 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2999 u64 flags = btrfs_header_flags(eb);
3000 btrfs_set_header_flags(eb, flags & ~flag);
3001 return (flags & flag) == flag;
3004 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
3006 u64 flags = btrfs_header_flags(eb);
3007 return flags >> BTRFS_BACKREF_REV_SHIFT;
3010 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
3013 u64 flags = btrfs_header_flags(eb);
3014 flags &= ~BTRFS_BACKREF_REV_MASK;
3015 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
3016 btrfs_set_header_flags(eb, flags);
3019 static inline unsigned long btrfs_header_fsid(void)
3021 return offsetof(struct btrfs_header, fsid);
3024 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
3026 return offsetof(struct btrfs_header, chunk_tree_uuid);
3029 static inline int btrfs_is_leaf(struct extent_buffer *eb)
3031 return btrfs_header_level(eb) == 0;
3034 /* struct btrfs_root_item */
3035 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
3037 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
3038 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
3039 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
3041 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
3043 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
3044 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
3045 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
3046 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
3047 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
3048 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
3049 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
3050 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
3052 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
3054 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
3056 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
3058 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
3060 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
3063 static inline bool btrfs_root_readonly(struct btrfs_root *root)
3065 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
3068 static inline bool btrfs_root_dead(struct btrfs_root *root)
3070 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
3073 /* struct btrfs_root_backup */
3074 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
3076 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
3078 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
3079 tree_root_level, 8);
3081 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
3083 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
3084 chunk_root_gen, 64);
3085 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
3086 chunk_root_level, 8);
3088 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
3090 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
3091 extent_root_gen, 64);
3092 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
3093 extent_root_level, 8);
3095 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
3097 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
3099 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
3102 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
3104 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
3106 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
3109 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
3111 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
3113 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
3114 csum_root_level, 8);
3115 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
3117 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
3119 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
3122 /* struct btrfs_balance_item */
3123 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
3125 static inline void btrfs_balance_data(struct extent_buffer *eb,
3126 struct btrfs_balance_item *bi,
3127 struct btrfs_disk_balance_args *ba)
3129 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3132 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
3133 struct btrfs_balance_item *bi,
3134 struct btrfs_disk_balance_args *ba)
3136 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3139 static inline void btrfs_balance_meta(struct extent_buffer *eb,
3140 struct btrfs_balance_item *bi,
3141 struct btrfs_disk_balance_args *ba)
3143 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3146 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
3147 struct btrfs_balance_item *bi,
3148 struct btrfs_disk_balance_args *ba)
3150 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3153 static inline void btrfs_balance_sys(struct extent_buffer *eb,
3154 struct btrfs_balance_item *bi,
3155 struct btrfs_disk_balance_args *ba)
3157 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3160 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
3161 struct btrfs_balance_item *bi,
3162 struct btrfs_disk_balance_args *ba)
3164 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3168 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3169 struct btrfs_disk_balance_args *disk)
3171 memset(cpu, 0, sizeof(*cpu));
3173 cpu->profiles = le64_to_cpu(disk->profiles);
3174 cpu->usage = le64_to_cpu(disk->usage);
3175 cpu->devid = le64_to_cpu(disk->devid);
3176 cpu->pstart = le64_to_cpu(disk->pstart);
3177 cpu->pend = le64_to_cpu(disk->pend);
3178 cpu->vstart = le64_to_cpu(disk->vstart);
3179 cpu->vend = le64_to_cpu(disk->vend);
3180 cpu->target = le64_to_cpu(disk->target);
3181 cpu->flags = le64_to_cpu(disk->flags);
3182 cpu->limit = le64_to_cpu(disk->limit);
3186 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3187 struct btrfs_balance_args *cpu)
3189 memset(disk, 0, sizeof(*disk));
3191 disk->profiles = cpu_to_le64(cpu->profiles);
3192 disk->usage = cpu_to_le64(cpu->usage);
3193 disk->devid = cpu_to_le64(cpu->devid);
3194 disk->pstart = cpu_to_le64(cpu->pstart);
3195 disk->pend = cpu_to_le64(cpu->pend);
3196 disk->vstart = cpu_to_le64(cpu->vstart);
3197 disk->vend = cpu_to_le64(cpu->vend);
3198 disk->target = cpu_to_le64(cpu->target);
3199 disk->flags = cpu_to_le64(cpu->flags);
3200 disk->limit = cpu_to_le64(cpu->limit);
3203 /* struct btrfs_super_block */
3204 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3205 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3206 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3208 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3209 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3210 struct btrfs_super_block, sys_chunk_array_size, 32);
3211 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3212 struct btrfs_super_block, chunk_root_generation, 64);
3213 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3215 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3217 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
3218 chunk_root_level, 8);
3219 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3221 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3222 log_root_transid, 64);
3223 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3225 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3227 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3229 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3231 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3233 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3235 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3236 root_dir_objectid, 64);
3237 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3239 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3241 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
3242 compat_ro_flags, 64);
3243 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3244 incompat_flags, 64);
3245 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3247 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3248 cache_generation, 64);
3249 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3250 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3251 uuid_tree_generation, 64);
3253 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3255 u16 t = btrfs_super_csum_type(s);
3257 * csum type is validated at mount time
3259 return btrfs_csum_sizes[t];
3262 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3264 return offsetof(struct btrfs_leaf, items);
3267 /* struct btrfs_file_extent_item */
3268 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3269 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3270 struct btrfs_file_extent_item, disk_bytenr, 64);
3271 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3272 struct btrfs_file_extent_item, offset, 64);
3273 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3274 struct btrfs_file_extent_item, generation, 64);
3275 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3276 struct btrfs_file_extent_item, num_bytes, 64);
3277 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3278 struct btrfs_file_extent_item, disk_num_bytes, 64);
3279 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3280 struct btrfs_file_extent_item, compression, 8);
3282 static inline unsigned long
3283 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3285 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3288 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3290 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3293 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3295 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3297 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3298 disk_num_bytes, 64);
3299 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3301 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3303 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3305 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3307 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3309 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3310 other_encoding, 16);
3313 * this returns the number of bytes used by the item on disk, minus the
3314 * size of any extent headers. If a file is compressed on disk, this is
3315 * the compressed size
3317 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3318 struct btrfs_item *e)
3320 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
3323 /* this returns the number of file bytes represented by the inline item.
3324 * If an item is compressed, this is the uncompressed size
3326 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3328 struct btrfs_file_extent_item *fi)
3330 struct btrfs_map_token token;
3332 btrfs_init_map_token(&token);
3334 * return the space used on disk if this item isn't
3335 * compressed or encoded
3337 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3338 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3339 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3340 return btrfs_file_extent_inline_item_len(eb,
3341 btrfs_item_nr(slot));
3344 /* otherwise use the ram bytes field */
3345 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3349 /* btrfs_dev_stats_item */
3350 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3351 struct btrfs_dev_stats_item *ptr,
3356 read_extent_buffer(eb, &val,
3357 offsetof(struct btrfs_dev_stats_item, values) +
3358 ((unsigned long)ptr) + (index * sizeof(u64)),
3363 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3364 struct btrfs_dev_stats_item *ptr,
3367 write_extent_buffer(eb, &val,
3368 offsetof(struct btrfs_dev_stats_item, values) +
3369 ((unsigned long)ptr) + (index * sizeof(u64)),
3373 /* btrfs_qgroup_status_item */
3374 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3376 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3378 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3380 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3383 /* btrfs_qgroup_info_item */
3384 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3386 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3387 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3389 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3390 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3393 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3394 struct btrfs_qgroup_info_item, generation, 64);
3395 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3397 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3398 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3399 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3401 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3402 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3404 /* btrfs_qgroup_limit_item */
3405 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3407 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3409 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3411 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3413 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3416 /* btrfs_dev_replace_item */
3417 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3418 struct btrfs_dev_replace_item, src_devid, 64);
3419 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3420 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3422 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3424 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3426 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3428 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3429 num_write_errors, 64);
3430 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3431 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3433 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3435 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3438 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3439 struct btrfs_dev_replace_item, src_devid, 64);
3440 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3441 struct btrfs_dev_replace_item,
3442 cont_reading_from_srcdev_mode, 64);
3443 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3444 struct btrfs_dev_replace_item, replace_state, 64);
3445 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3446 struct btrfs_dev_replace_item, time_started, 64);
3447 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3448 struct btrfs_dev_replace_item, time_stopped, 64);
3449 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3450 struct btrfs_dev_replace_item, num_write_errors, 64);
3451 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3452 struct btrfs_dev_replace_item,
3453 num_uncorrectable_read_errors, 64);
3454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3455 struct btrfs_dev_replace_item, cursor_left, 64);
3456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3457 struct btrfs_dev_replace_item, cursor_right, 64);
3459 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3461 return sb->s_fs_info;
3464 /* helper function to cast into the data area of the leaf. */
3465 #define btrfs_item_ptr(leaf, slot, type) \
3466 ((type *)(btrfs_leaf_data(leaf) + \
3467 btrfs_item_offset_nr(leaf, slot)))
3469 #define btrfs_item_ptr_offset(leaf, slot) \
3470 ((unsigned long)(btrfs_leaf_data(leaf) + \
3471 btrfs_item_offset_nr(leaf, slot)))
3473 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3475 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3476 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3479 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3481 return mapping_gfp_constraint(mapping, ~__GFP_FS);
3486 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
3488 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3491 return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3496 * Doing a truncate won't result in new nodes or leaves, just what we need for
3499 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3502 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3505 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3506 struct btrfs_root *root);
3507 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3508 struct btrfs_root *root);
3509 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3510 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3511 struct btrfs_root *root, unsigned long count);
3512 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3513 unsigned long count, int wait);
3514 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3515 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3516 struct btrfs_root *root, u64 bytenr,
3517 u64 offset, int metadata, u64 *refs, u64 *flags);
3518 int btrfs_pin_extent(struct btrfs_root *root,
3519 u64 bytenr, u64 num, int reserved);
3520 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3521 u64 bytenr, u64 num_bytes);
3522 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3523 struct extent_buffer *eb);
3524 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3525 struct btrfs_root *root,
3526 u64 objectid, u64 offset, u64 bytenr);
3527 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3528 struct btrfs_fs_info *info,
3530 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
3531 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3532 int get_block_group_index(struct btrfs_block_group_cache *cache);
3533 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3534 struct btrfs_root *root, u64 parent,
3536 struct btrfs_disk_key *key, int level,
3537 u64 hint, u64 empty_size);
3538 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3539 struct btrfs_root *root,
3540 struct extent_buffer *buf,
3541 u64 parent, int last_ref);
3542 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3543 struct btrfs_root *root,
3544 u64 root_objectid, u64 owner,
3545 u64 offset, u64 ram_bytes,
3546 struct btrfs_key *ins);
3547 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3548 struct btrfs_root *root,
3549 u64 root_objectid, u64 owner, u64 offset,
3550 struct btrfs_key *ins);
3551 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3552 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3553 struct btrfs_key *ins, int is_data, int delalloc);
3554 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3555 struct extent_buffer *buf, int full_backref);
3556 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3557 struct extent_buffer *buf, int full_backref);
3558 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3559 struct btrfs_root *root,
3560 u64 bytenr, u64 num_bytes, u64 flags,
3561 int level, int is_data);
3562 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3563 struct btrfs_root *root,
3564 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3565 u64 owner, u64 offset);
3567 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3569 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3570 u64 start, u64 len);
3571 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3572 struct btrfs_root *root);
3573 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3574 struct btrfs_root *root);
3575 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3576 struct btrfs_root *root,
3577 u64 bytenr, u64 num_bytes, u64 parent,
3578 u64 root_objectid, u64 owner, u64 offset);
3580 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
3581 struct btrfs_root *root);
3582 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3583 struct btrfs_root *root);
3584 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
3585 struct btrfs_root *root);
3586 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3587 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3588 int btrfs_read_block_groups(struct btrfs_root *root);
3589 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3590 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3591 struct btrfs_root *root, u64 bytes_used,
3592 u64 type, u64 chunk_objectid, u64 chunk_offset,
3594 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
3595 struct btrfs_fs_info *fs_info,
3596 const u64 chunk_offset);
3597 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3598 struct btrfs_root *root, u64 group_start,
3599 struct extent_map *em);
3600 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3601 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
3602 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
3603 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3604 struct btrfs_root *root);
3605 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3606 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3608 enum btrfs_reserve_flush_enum {
3609 /* If we are in the transaction, we can't flush anything.*/
3610 BTRFS_RESERVE_NO_FLUSH,
3612 * Flushing delalloc may cause deadlock somewhere, in this
3613 * case, use FLUSH LIMIT
3615 BTRFS_RESERVE_FLUSH_LIMIT,
3616 BTRFS_RESERVE_FLUSH_ALL,
3619 int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
3620 int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
3621 void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
3622 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
3624 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3625 struct btrfs_root *root);
3626 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
3627 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3628 struct inode *inode);
3629 void btrfs_orphan_release_metadata(struct inode *inode);
3630 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3631 struct btrfs_block_rsv *rsv,
3633 u64 *qgroup_reserved, bool use_global_rsv);
3634 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3635 struct btrfs_block_rsv *rsv,
3636 u64 qgroup_reserved);
3637 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3638 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3639 int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
3640 void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
3641 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3642 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3643 unsigned short type);
3644 void btrfs_free_block_rsv(struct btrfs_root *root,
3645 struct btrfs_block_rsv *rsv);
3646 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3647 int btrfs_block_rsv_add(struct btrfs_root *root,
3648 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3649 enum btrfs_reserve_flush_enum flush);
3650 int btrfs_block_rsv_check(struct btrfs_root *root,
3651 struct btrfs_block_rsv *block_rsv, int min_factor);
3652 int btrfs_block_rsv_refill(struct btrfs_root *root,
3653 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3654 enum btrfs_reserve_flush_enum flush);
3655 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3656 struct btrfs_block_rsv *dst_rsv,
3658 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3659 struct btrfs_block_rsv *dest, u64 num_bytes,
3661 void btrfs_block_rsv_release(struct btrfs_root *root,
3662 struct btrfs_block_rsv *block_rsv,
3664 int btrfs_inc_block_group_ro(struct btrfs_root *root,
3665 struct btrfs_block_group_cache *cache);
3666 void btrfs_dec_block_group_ro(struct btrfs_root *root,
3667 struct btrfs_block_group_cache *cache);
3668 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3669 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3670 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3671 u64 start, u64 end);
3672 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
3673 u64 num_bytes, u64 *actual_bytes);
3674 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3675 struct btrfs_root *root, u64 type);
3676 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3678 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3679 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3680 struct btrfs_fs_info *fs_info);
3681 int __get_raid_index(u64 flags);
3682 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3683 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3684 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
3685 void check_system_chunk(struct btrfs_trans_handle *trans,
3686 struct btrfs_root *root,
3688 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
3689 struct btrfs_fs_info *info, u64 start, u64 end);
3692 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3693 int level, int *slot);
3694 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3695 int btrfs_previous_item(struct btrfs_root *root,
3696 struct btrfs_path *path, u64 min_objectid,
3698 int btrfs_previous_extent_item(struct btrfs_root *root,
3699 struct btrfs_path *path, u64 min_objectid);
3700 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
3701 struct btrfs_path *path,
3702 struct btrfs_key *new_key);
3703 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3704 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3705 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3706 struct btrfs_key *key, int lowest_level,
3708 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3709 struct btrfs_path *path,
3711 enum btrfs_compare_tree_result {
3712 BTRFS_COMPARE_TREE_NEW,
3713 BTRFS_COMPARE_TREE_DELETED,
3714 BTRFS_COMPARE_TREE_CHANGED,
3715 BTRFS_COMPARE_TREE_SAME,
3717 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3718 struct btrfs_root *right_root,
3719 struct btrfs_path *left_path,
3720 struct btrfs_path *right_path,
3721 struct btrfs_key *key,
3722 enum btrfs_compare_tree_result result,
3724 int btrfs_compare_trees(struct btrfs_root *left_root,
3725 struct btrfs_root *right_root,
3726 btrfs_changed_cb_t cb, void *ctx);
3727 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3728 struct btrfs_root *root, struct extent_buffer *buf,
3729 struct extent_buffer *parent, int parent_slot,
3730 struct extent_buffer **cow_ret);
3731 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3732 struct btrfs_root *root,
3733 struct extent_buffer *buf,
3734 struct extent_buffer **cow_ret, u64 new_root_objectid);
3735 int btrfs_block_can_be_shared(struct btrfs_root *root,
3736 struct extent_buffer *buf);
3737 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3739 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3740 u32 new_size, int from_end);
3741 int btrfs_split_item(struct btrfs_trans_handle *trans,
3742 struct btrfs_root *root,
3743 struct btrfs_path *path,
3744 struct btrfs_key *new_key,
3745 unsigned long split_offset);
3746 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3747 struct btrfs_root *root,
3748 struct btrfs_path *path,
3749 struct btrfs_key *new_key);
3750 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3751 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3752 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3753 *root, struct btrfs_key *key, struct btrfs_path *p, int
3755 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3756 struct btrfs_path *p, u64 time_seq);
3757 int btrfs_search_slot_for_read(struct btrfs_root *root,
3758 struct btrfs_key *key, struct btrfs_path *p,
3759 int find_higher, int return_any);
3760 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3761 struct btrfs_root *root, struct extent_buffer *parent,
3762 int start_slot, u64 *last_ret,
3763 struct btrfs_key *progress);
3764 void btrfs_release_path(struct btrfs_path *p);
3765 struct btrfs_path *btrfs_alloc_path(void);
3766 void btrfs_free_path(struct btrfs_path *p);
3767 void btrfs_set_path_blocking(struct btrfs_path *p);
3768 void btrfs_clear_path_blocking(struct btrfs_path *p,
3769 struct extent_buffer *held, int held_rw);
3770 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3772 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3773 struct btrfs_path *path, int slot, int nr);
3774 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3775 struct btrfs_root *root,
3776 struct btrfs_path *path)
3778 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3781 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3782 struct btrfs_key *cpu_key, u32 *data_size,
3783 u32 total_data, u32 total_size, int nr);
3784 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3785 *root, struct btrfs_key *key, void *data, u32 data_size);
3786 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3787 struct btrfs_root *root,
3788 struct btrfs_path *path,
3789 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3791 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3792 struct btrfs_root *root,
3793 struct btrfs_path *path,
3794 struct btrfs_key *key,
3797 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3800 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3801 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3802 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3804 static inline int btrfs_next_old_item(struct btrfs_root *root,
3805 struct btrfs_path *p, u64 time_seq)
3808 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3809 return btrfs_next_old_leaf(root, p, time_seq);
3812 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3814 return btrfs_next_old_item(root, p, 0);
3816 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3817 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3818 struct btrfs_block_rsv *block_rsv,
3819 int update_ref, int for_reloc);
3820 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3821 struct btrfs_root *root,
3822 struct extent_buffer *node,
3823 struct extent_buffer *parent);
3824 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3827 * Get synced with close_ctree()
3830 return fs_info->closing;
3834 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3835 * anything except sleeping. This function is used to check the status of
3838 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3840 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3841 btrfs_fs_closing(root->fs_info));
3844 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3846 kfree(fs_info->balance_ctl);
3847 kfree(fs_info->delayed_root);
3848 kfree(fs_info->extent_root);
3849 kfree(fs_info->tree_root);
3850 kfree(fs_info->chunk_root);
3851 kfree(fs_info->dev_root);
3852 kfree(fs_info->csum_root);
3853 kfree(fs_info->quota_root);
3854 kfree(fs_info->uuid_root);
3855 kfree(fs_info->free_space_root);
3856 kfree(fs_info->super_copy);
3857 kfree(fs_info->super_for_commit);
3858 security_free_mnt_opts(&fs_info->security_opts);
3862 /* tree mod log functions from ctree.c */
3863 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3864 struct seq_list *elem);
3865 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3866 struct seq_list *elem);
3867 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3870 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3871 struct btrfs_path *path,
3872 u64 root_id, u64 ref_id);
3873 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3874 struct btrfs_root *tree_root,
3875 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3876 const char *name, int name_len);
3877 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3878 struct btrfs_root *tree_root,
3879 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3880 const char *name, int name_len);
3881 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3882 struct btrfs_key *key);
3883 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3884 *root, struct btrfs_key *key, struct btrfs_root_item
3886 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3887 struct btrfs_root *root,
3888 struct btrfs_key *key,
3889 struct btrfs_root_item *item);
3890 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3891 struct btrfs_path *path, struct btrfs_root_item *root_item,
3892 struct btrfs_key *root_key);
3893 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3894 void btrfs_set_root_node(struct btrfs_root_item *item,
3895 struct extent_buffer *node);
3896 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3897 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3898 struct btrfs_root *root);
3901 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3902 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3904 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3905 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3907 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3908 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3912 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3913 const char *name, int name_len);
3914 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3915 struct btrfs_root *root, const char *name,
3916 int name_len, struct inode *dir,
3917 struct btrfs_key *location, u8 type, u64 index);
3918 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3919 struct btrfs_root *root,
3920 struct btrfs_path *path, u64 dir,
3921 const char *name, int name_len,
3923 struct btrfs_dir_item *
3924 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3925 struct btrfs_root *root,
3926 struct btrfs_path *path, u64 dir,
3927 u64 objectid, const char *name, int name_len,
3929 struct btrfs_dir_item *
3930 btrfs_search_dir_index_item(struct btrfs_root *root,
3931 struct btrfs_path *path, u64 dirid,
3932 const char *name, int name_len);
3933 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3934 struct btrfs_root *root,
3935 struct btrfs_path *path,
3936 struct btrfs_dir_item *di);
3937 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3938 struct btrfs_root *root,
3939 struct btrfs_path *path, u64 objectid,
3940 const char *name, u16 name_len,
3941 const void *data, u16 data_len);
3942 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3943 struct btrfs_root *root,
3944 struct btrfs_path *path, u64 dir,
3945 const char *name, u16 name_len,
3947 int verify_dir_item(struct btrfs_root *root,
3948 struct extent_buffer *leaf,
3949 struct btrfs_dir_item *dir_item);
3950 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3951 struct btrfs_path *path,
3956 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3957 struct btrfs_root *root, u64 offset);
3958 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3959 struct btrfs_root *root, u64 offset);
3960 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3963 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3964 struct btrfs_root *root,
3965 const char *name, int name_len,
3966 u64 inode_objectid, u64 ref_objectid, u64 index);
3967 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3968 struct btrfs_root *root,
3969 const char *name, int name_len,
3970 u64 inode_objectid, u64 ref_objectid, u64 *index);
3971 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3972 struct btrfs_root *root,
3973 struct btrfs_path *path, u64 objectid);
3974 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3975 *root, struct btrfs_path *path,
3976 struct btrfs_key *location, int mod);
3978 struct btrfs_inode_extref *
3979 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3980 struct btrfs_root *root,
3981 struct btrfs_path *path,
3982 const char *name, int name_len,
3983 u64 inode_objectid, u64 ref_objectid, int ins_len,
3986 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3987 u64 ref_objectid, const char *name,
3989 struct btrfs_inode_extref **extref_ret);
3992 struct btrfs_dio_private;
3993 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3994 struct btrfs_root *root, u64 bytenr, u64 len);
3995 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3996 struct bio *bio, u32 *dst);
3997 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3998 struct bio *bio, u64 logical_offset);
3999 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
4000 struct btrfs_root *root,
4001 u64 objectid, u64 pos,
4002 u64 disk_offset, u64 disk_num_bytes,
4003 u64 num_bytes, u64 offset, u64 ram_bytes,
4004 u8 compression, u8 encryption, u16 other_encoding);
4005 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
4006 struct btrfs_root *root,
4007 struct btrfs_path *path, u64 objectid,
4008 u64 bytenr, int mod);
4009 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
4010 struct btrfs_root *root,
4011 struct btrfs_ordered_sum *sums);
4012 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
4013 struct bio *bio, u64 file_start, int contig);
4014 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
4015 struct list_head *list, int search_commit);
4016 void btrfs_extent_item_to_extent_map(struct inode *inode,
4017 const struct btrfs_path *path,
4018 struct btrfs_file_extent_item *fi,
4019 const bool new_inline,
4020 struct extent_map *em);
4023 struct btrfs_delalloc_work {
4024 struct inode *inode;
4026 struct completion completion;
4027 struct list_head list;
4028 struct btrfs_work work;
4031 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
4033 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
4035 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
4036 size_t pg_offset, u64 start, u64 len,
4038 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
4039 u64 *orig_start, u64 *orig_block_len,
4042 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
4043 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
4044 #define ClearPageChecked ClearPageFsMisc
4045 #define SetPageChecked SetPageFsMisc
4046 #define PageChecked PageFsMisc
4049 /* This forces readahead on a given range of bytes in an inode */
4050 static inline void btrfs_force_ra(struct address_space *mapping,
4051 struct file_ra_state *ra, struct file *file,
4052 pgoff_t offset, unsigned long req_size)
4054 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
4057 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
4058 int btrfs_set_inode_index(struct inode *dir, u64 *index);
4059 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
4060 struct btrfs_root *root,
4061 struct inode *dir, struct inode *inode,
4062 const char *name, int name_len);
4063 int btrfs_add_link(struct btrfs_trans_handle *trans,
4064 struct inode *parent_inode, struct inode *inode,
4065 const char *name, int name_len, int add_backref, u64 index);
4066 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
4067 struct btrfs_root *root,
4068 struct inode *dir, u64 objectid,
4069 const char *name, int name_len);
4070 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
4072 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
4073 struct btrfs_root *root,
4074 struct inode *inode, u64 new_size,
4077 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
4078 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
4080 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
4081 struct extent_state **cached_state);
4082 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
4083 struct btrfs_root *new_root,
4084 struct btrfs_root *parent_root,
4086 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
4087 size_t size, struct bio *bio,
4088 unsigned long bio_flags);
4089 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
4090 int btrfs_readpage(struct file *file, struct page *page);
4091 void btrfs_evict_inode(struct inode *inode);
4092 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
4093 struct inode *btrfs_alloc_inode(struct super_block *sb);
4094 void btrfs_destroy_inode(struct inode *inode);
4095 int btrfs_drop_inode(struct inode *inode);
4096 int btrfs_init_cachep(void);
4097 void btrfs_destroy_cachep(void);
4098 long btrfs_ioctl_trans_end(struct file *file);
4099 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
4100 struct btrfs_root *root, int *was_new);
4101 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
4102 size_t pg_offset, u64 start, u64 end,
4104 int btrfs_update_inode(struct btrfs_trans_handle *trans,
4105 struct btrfs_root *root,
4106 struct inode *inode);
4107 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
4108 struct btrfs_root *root, struct inode *inode);
4109 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
4110 int btrfs_orphan_cleanup(struct btrfs_root *root);
4111 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
4112 struct btrfs_root *root);
4113 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
4114 void btrfs_invalidate_inodes(struct btrfs_root *root);
4115 void btrfs_add_delayed_iput(struct inode *inode);
4116 void btrfs_run_delayed_iputs(struct btrfs_root *root);
4117 int btrfs_prealloc_file_range(struct inode *inode, int mode,
4118 u64 start, u64 num_bytes, u64 min_size,
4119 loff_t actual_len, u64 *alloc_hint);
4120 int btrfs_prealloc_file_range_trans(struct inode *inode,
4121 struct btrfs_trans_handle *trans, int mode,
4122 u64 start, u64 num_bytes, u64 min_size,
4123 loff_t actual_len, u64 *alloc_hint);
4124 int btrfs_inode_check_errors(struct inode *inode);
4125 extern const struct dentry_operations btrfs_dentry_operations;
4126 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4127 void btrfs_test_inode_set_ops(struct inode *inode);
4131 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
4132 void btrfs_update_iflags(struct inode *inode);
4133 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
4134 int btrfs_is_empty_uuid(u8 *uuid);
4135 int btrfs_defrag_file(struct inode *inode, struct file *file,
4136 struct btrfs_ioctl_defrag_range_args *range,
4137 u64 newer_than, unsigned long max_pages);
4138 void btrfs_get_block_group_info(struct list_head *groups_list,
4139 struct btrfs_ioctl_space_info *space);
4140 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
4141 struct btrfs_ioctl_balance_args *bargs);
4142 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
4143 struct file *dst_file, u64 dst_loff);
4146 int btrfs_auto_defrag_init(void);
4147 void btrfs_auto_defrag_exit(void);
4148 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
4149 struct inode *inode);
4150 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
4151 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
4152 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
4153 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
4155 extern const struct file_operations btrfs_file_operations;
4156 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
4157 struct btrfs_root *root, struct inode *inode,
4158 struct btrfs_path *path, u64 start, u64 end,
4159 u64 *drop_end, int drop_cache,
4161 u32 extent_item_size,
4163 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
4164 struct btrfs_root *root, struct inode *inode, u64 start,
4165 u64 end, int drop_cache);
4166 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
4167 struct inode *inode, u64 start, u64 end);
4168 int btrfs_release_file(struct inode *inode, struct file *file);
4169 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
4170 struct page **pages, size_t num_pages,
4171 loff_t pos, size_t write_bytes,
4172 struct extent_state **cached);
4173 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
4174 ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
4175 struct file *file_out, loff_t pos_out,
4176 size_t len, unsigned int flags);
4177 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
4178 struct file *file_out, loff_t pos_out, u64 len);
4181 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
4182 struct btrfs_root *root);
4185 int btrfs_init_sysfs(void);
4186 void btrfs_exit_sysfs(void);
4187 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
4188 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
4191 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
4194 int btrfs_parse_options(struct btrfs_root *root, char *options,
4195 unsigned long new_flags);
4196 int btrfs_sync_fs(struct super_block *sb, int wait);
4198 #ifdef CONFIG_PRINTK
4200 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4202 static inline __printf(2, 3)
4203 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4208 #define btrfs_emerg(fs_info, fmt, args...) \
4209 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4210 #define btrfs_alert(fs_info, fmt, args...) \
4211 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4212 #define btrfs_crit(fs_info, fmt, args...) \
4213 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4214 #define btrfs_err(fs_info, fmt, args...) \
4215 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4216 #define btrfs_warn(fs_info, fmt, args...) \
4217 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4218 #define btrfs_notice(fs_info, fmt, args...) \
4219 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4220 #define btrfs_info(fs_info, fmt, args...) \
4221 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4224 * Wrappers that use printk_in_rcu
4226 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
4227 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4228 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
4229 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4230 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
4231 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4232 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
4233 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
4234 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
4235 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4236 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
4237 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4238 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
4239 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
4242 * Wrappers that use a ratelimited printk_in_rcu
4244 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
4245 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4246 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
4247 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4248 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
4249 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4250 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
4251 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
4252 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
4253 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4254 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
4255 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4256 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
4257 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
4260 * Wrappers that use a ratelimited printk
4262 #define btrfs_emerg_rl(fs_info, fmt, args...) \
4263 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
4264 #define btrfs_alert_rl(fs_info, fmt, args...) \
4265 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
4266 #define btrfs_crit_rl(fs_info, fmt, args...) \
4267 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
4268 #define btrfs_err_rl(fs_info, fmt, args...) \
4269 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
4270 #define btrfs_warn_rl(fs_info, fmt, args...) \
4271 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
4272 #define btrfs_notice_rl(fs_info, fmt, args...) \
4273 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
4274 #define btrfs_info_rl(fs_info, fmt, args...) \
4275 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
4277 #define btrfs_debug(fs_info, fmt, args...) \
4278 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4279 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4280 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4281 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4282 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4283 #define btrfs_debug_rl(fs_info, fmt, args...) \
4284 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
4286 #define btrfs_debug(fs_info, fmt, args...) \
4287 no_printk(KERN_DEBUG fmt, ##args)
4288 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4289 no_printk(KERN_DEBUG fmt, ##args)
4290 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4291 no_printk(KERN_DEBUG fmt, ##args)
4292 #define btrfs_debug_rl(fs_info, fmt, args...) \
4293 no_printk(KERN_DEBUG fmt, ##args)
4296 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
4299 btrfs_printk(fs_info, fmt, ##args); \
4300 rcu_read_unlock(); \
4303 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
4305 static DEFINE_RATELIMIT_STATE(_rs, \
4306 DEFAULT_RATELIMIT_INTERVAL, \
4307 DEFAULT_RATELIMIT_BURST); \
4308 if (__ratelimit(&_rs)) \
4309 btrfs_printk(fs_info, fmt, ##args); \
4312 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
4315 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
4316 rcu_read_unlock(); \
4319 #ifdef CONFIG_BTRFS_ASSERT
4322 static inline void assfail(char *expr, char *file, int line)
4324 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4329 #define ASSERT(expr) \
4330 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4332 #define ASSERT(expr) ((void)0)
4335 #define btrfs_assert()
4338 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
4339 unsigned int line, int errno, const char *fmt, ...);
4341 const char *btrfs_decode_error(int errno);
4344 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4345 struct btrfs_root *root, const char *function,
4346 unsigned int line, int errno);
4348 #define btrfs_set_fs_incompat(__fs_info, opt) \
4349 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4351 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4354 struct btrfs_super_block *disk_super;
4357 disk_super = fs_info->super_copy;
4358 features = btrfs_super_incompat_flags(disk_super);
4359 if (!(features & flag)) {
4360 spin_lock(&fs_info->super_lock);
4361 features = btrfs_super_incompat_flags(disk_super);
4362 if (!(features & flag)) {
4364 btrfs_set_super_incompat_flags(disk_super, features);
4365 btrfs_info(fs_info, "setting %llu feature flag",
4368 spin_unlock(&fs_info->super_lock);
4372 #define btrfs_clear_fs_incompat(__fs_info, opt) \
4373 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4375 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
4378 struct btrfs_super_block *disk_super;
4381 disk_super = fs_info->super_copy;
4382 features = btrfs_super_incompat_flags(disk_super);
4383 if (features & flag) {
4384 spin_lock(&fs_info->super_lock);
4385 features = btrfs_super_incompat_flags(disk_super);
4386 if (features & flag) {
4388 btrfs_set_super_incompat_flags(disk_super, features);
4389 btrfs_info(fs_info, "clearing %llu feature flag",
4392 spin_unlock(&fs_info->super_lock);
4396 #define btrfs_fs_incompat(fs_info, opt) \
4397 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4399 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4401 struct btrfs_super_block *disk_super;
4402 disk_super = fs_info->super_copy;
4403 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4406 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
4407 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4409 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
4412 struct btrfs_super_block *disk_super;
4415 disk_super = fs_info->super_copy;
4416 features = btrfs_super_compat_ro_flags(disk_super);
4417 if (!(features & flag)) {
4418 spin_lock(&fs_info->super_lock);
4419 features = btrfs_super_compat_ro_flags(disk_super);
4420 if (!(features & flag)) {
4422 btrfs_set_super_compat_ro_flags(disk_super, features);
4423 btrfs_info(fs_info, "setting %llu ro feature flag",
4426 spin_unlock(&fs_info->super_lock);
4430 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
4431 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4433 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
4436 struct btrfs_super_block *disk_super;
4439 disk_super = fs_info->super_copy;
4440 features = btrfs_super_compat_ro_flags(disk_super);
4441 if (features & flag) {
4442 spin_lock(&fs_info->super_lock);
4443 features = btrfs_super_compat_ro_flags(disk_super);
4444 if (features & flag) {
4446 btrfs_set_super_compat_ro_flags(disk_super, features);
4447 btrfs_info(fs_info, "clearing %llu ro feature flag",
4450 spin_unlock(&fs_info->super_lock);
4454 #define btrfs_fs_compat_ro(fs_info, opt) \
4455 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4457 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
4459 struct btrfs_super_block *disk_super;
4460 disk_super = fs_info->super_copy;
4461 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
4465 * Call btrfs_abort_transaction as early as possible when an error condition is
4466 * detected, that way the exact line number is reported.
4468 #define btrfs_abort_transaction(trans, root, errno) \
4470 /* Report first abort since mount */ \
4471 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
4472 &((root)->fs_info->fs_state))) { \
4473 WARN(1, KERN_DEBUG \
4474 "BTRFS: Transaction aborted (error %d)\n", \
4477 __btrfs_abort_transaction((trans), (root), __func__, \
4478 __LINE__, (errno)); \
4481 #define btrfs_std_error(fs_info, errno, fmt, args...) \
4483 __btrfs_std_error((fs_info), __func__, __LINE__, \
4484 (errno), fmt, ##args); \
4489 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4490 unsigned int line, int errno, const char *fmt, ...);
4493 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4494 * will panic(). Otherwise we BUG() here.
4496 #define btrfs_panic(fs_info, errno, fmt, args...) \
4498 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4503 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4504 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4505 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4506 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4507 struct inode *inode, struct inode *dir);
4509 #define btrfs_get_acl NULL
4510 #define btrfs_set_acl NULL
4511 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4512 struct inode *inode, struct inode *dir)
4519 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4520 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4521 struct btrfs_root *root);
4522 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4523 struct btrfs_root *root);
4524 int btrfs_recover_relocation(struct btrfs_root *root);
4525 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4526 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4527 struct btrfs_root *root, struct extent_buffer *buf,
4528 struct extent_buffer *cow);
4529 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
4530 u64 *bytes_to_reserve);
4531 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4532 struct btrfs_pending_snapshot *pending);
4535 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4536 u64 end, struct btrfs_scrub_progress *progress,
4537 int readonly, int is_dev_replace);
4538 void btrfs_scrub_pause(struct btrfs_root *root);
4539 void btrfs_scrub_continue(struct btrfs_root *root);
4540 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4541 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4542 struct btrfs_device *dev);
4543 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4544 struct btrfs_scrub_progress *progress);
4547 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4548 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4549 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4551 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4553 btrfs_bio_counter_sub(fs_info, 1);
4557 struct reada_control {
4558 struct btrfs_root *root; /* tree to prefetch */
4559 struct btrfs_key key_start;
4560 struct btrfs_key key_end; /* exclusive */
4563 wait_queue_head_t wait;
4565 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4566 struct btrfs_key *start, struct btrfs_key *end);
4567 int btrfs_reada_wait(void *handle);
4568 void btrfs_reada_detach(void *handle);
4569 int btree_readahead_hook(struct btrfs_fs_info *fs_info,
4570 struct extent_buffer *eb, u64 start, int err);
4572 static inline int is_fstree(u64 rootid)
4574 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4575 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
4576 !btrfs_qgroup_level(rootid)))
4581 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4583 return signal_pending(current);
4586 /* Sanity test specific functions */
4587 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4588 void btrfs_test_destroy_inode(struct inode *inode);
4591 static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4593 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4594 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))