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 struct btrfs_inode_item {
722 /* nfs style generation number */
724 /* transid that last touched this inode */
736 /* modification sequence number for NFS */
740 * a little future expansion, for more than this we can
741 * just grow the inode item and version it
744 struct btrfs_timespec atime;
745 struct btrfs_timespec ctime;
746 struct btrfs_timespec mtime;
747 struct btrfs_timespec otime;
748 } __attribute__ ((__packed__));
750 struct btrfs_dir_log_item {
752 } __attribute__ ((__packed__));
754 struct btrfs_dir_item {
755 struct btrfs_disk_key location;
760 } __attribute__ ((__packed__));
762 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
765 * Internal in-memory flag that a subvolume has been marked for deletion but
766 * still visible as a directory
768 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
770 struct btrfs_root_item {
771 struct btrfs_inode_item inode;
777 __le64 last_snapshot;
780 struct btrfs_disk_key drop_progress;
785 * The following fields appear after subvol_uuids+subvol_times
790 * This generation number is used to test if the new fields are valid
791 * and up to date while reading the root item. Every time the root item
792 * is written out, the "generation" field is copied into this field. If
793 * anyone ever mounted the fs with an older kernel, we will have
794 * mismatching generation values here and thus must invalidate the
795 * new fields. See btrfs_update_root and btrfs_find_last_root for
797 * the offset of generation_v2 is also used as the start for the memset
798 * when invalidating the fields.
800 __le64 generation_v2;
801 u8 uuid[BTRFS_UUID_SIZE];
802 u8 parent_uuid[BTRFS_UUID_SIZE];
803 u8 received_uuid[BTRFS_UUID_SIZE];
804 __le64 ctransid; /* updated when an inode changes */
805 __le64 otransid; /* trans when created */
806 __le64 stransid; /* trans when sent. non-zero for received subvol */
807 __le64 rtransid; /* trans when received. non-zero for received subvol */
808 struct btrfs_timespec ctime;
809 struct btrfs_timespec otime;
810 struct btrfs_timespec stime;
811 struct btrfs_timespec rtime;
812 __le64 reserved[8]; /* for future */
813 } __attribute__ ((__packed__));
816 * this is used for both forward and backward root refs
818 struct btrfs_root_ref {
822 } __attribute__ ((__packed__));
824 struct btrfs_disk_balance_args {
826 * profiles to operate on, single is denoted by
827 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
833 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
834 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
847 /* devid subset filter [pstart..pend) */
851 /* btrfs virtual address space subset filter [vstart..vend) */
856 * profile to convert to, single is denoted by
857 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
861 /* BTRFS_BALANCE_ARGS_* */
865 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
866 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
878 * Process chunks that cross stripes_min..stripes_max devices,
879 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
885 } __attribute__ ((__packed__));
888 * store balance parameters to disk so that balance can be properly
889 * resumed after crash or unmount
891 struct btrfs_balance_item {
892 /* BTRFS_BALANCE_* */
895 struct btrfs_disk_balance_args data;
896 struct btrfs_disk_balance_args meta;
897 struct btrfs_disk_balance_args sys;
900 } __attribute__ ((__packed__));
902 #define BTRFS_FILE_EXTENT_INLINE 0
903 #define BTRFS_FILE_EXTENT_REG 1
904 #define BTRFS_FILE_EXTENT_PREALLOC 2
906 struct btrfs_file_extent_item {
908 * transaction id that created this extent
912 * max number of bytes to hold this extent in ram
913 * when we split a compressed extent we can't know how big
914 * each of the resulting pieces will be. So, this is
915 * an upper limit on the size of the extent in ram instead of
921 * 32 bits for the various ways we might encode the data,
922 * including compression and encryption. If any of these
923 * are set to something a given disk format doesn't understand
924 * it is treated like an incompat flag for reading and writing,
929 __le16 other_encoding; /* spare for later use */
931 /* are we inline data or a real extent? */
935 * disk space consumed by the extent, checksum blocks are included
938 * At this offset in the structure, the inline extent data start.
941 __le64 disk_num_bytes;
943 * the logical offset in file blocks (no csums)
944 * this extent record is for. This allows a file extent to point
945 * into the middle of an existing extent on disk, sharing it
946 * between two snapshots (useful if some bytes in the middle of the
947 * extent have changed
951 * the logical number of file blocks (no csums included). This
952 * always reflects the size uncompressed and without encoding.
956 } __attribute__ ((__packed__));
958 struct btrfs_csum_item {
960 } __attribute__ ((__packed__));
962 struct btrfs_dev_stats_item {
964 * grow this item struct at the end for future enhancements and keep
965 * the existing values unchanged
967 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
968 } __attribute__ ((__packed__));
970 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
971 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
972 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
973 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
974 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
975 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
976 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
978 struct btrfs_dev_replace {
979 u64 replace_state; /* see #define above */
980 u64 time_started; /* seconds since 1-Jan-1970 */
981 u64 time_stopped; /* seconds since 1-Jan-1970 */
982 atomic64_t num_write_errors;
983 atomic64_t num_uncorrectable_read_errors;
986 u64 committed_cursor_left;
987 u64 cursor_left_last_write_of_item;
990 u64 cont_reading_from_srcdev_mode; /* see #define above */
993 int item_needs_writeback;
994 struct btrfs_device *srcdev;
995 struct btrfs_device *tgtdev;
998 atomic_t nesting_level;
999 struct mutex lock_finishing_cancel_unmount;
1001 atomic_t read_locks;
1002 atomic_t blocking_readers;
1003 wait_queue_head_t read_lock_wq;
1005 struct btrfs_scrub_progress scrub_progress;
1008 struct btrfs_dev_replace_item {
1010 * grow this item struct at the end for future enhancements and keep
1011 * the existing values unchanged
1015 __le64 cursor_right;
1016 __le64 cont_reading_from_srcdev_mode;
1018 __le64 replace_state;
1019 __le64 time_started;
1020 __le64 time_stopped;
1021 __le64 num_write_errors;
1022 __le64 num_uncorrectable_read_errors;
1023 } __attribute__ ((__packed__));
1025 /* different types of block groups (and chunks) */
1026 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
1027 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
1028 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
1029 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
1030 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
1031 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
1032 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
1033 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1034 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1035 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1036 BTRFS_SPACE_INFO_GLOBAL_RSV)
1038 enum btrfs_raid_types {
1049 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1050 BTRFS_BLOCK_GROUP_SYSTEM | \
1051 BTRFS_BLOCK_GROUP_METADATA)
1053 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1054 BTRFS_BLOCK_GROUP_RAID1 | \
1055 BTRFS_BLOCK_GROUP_RAID5 | \
1056 BTRFS_BLOCK_GROUP_RAID6 | \
1057 BTRFS_BLOCK_GROUP_DUP | \
1058 BTRFS_BLOCK_GROUP_RAID10)
1059 #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1060 BTRFS_BLOCK_GROUP_RAID6)
1063 * We need a bit for restriper to be able to tell when chunks of type
1064 * SINGLE are available. This "extended" profile format is used in
1065 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1066 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1067 * to avoid remappings between two formats in future.
1069 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1072 * A fake block group type that is used to communicate global block reserve
1073 * size to userspace via the SPACE_INFO ioctl.
1075 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1077 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1078 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1080 static inline u64 chunk_to_extended(u64 flags)
1082 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1083 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1087 static inline u64 extended_to_chunk(u64 flags)
1089 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1092 struct btrfs_block_group_item {
1094 __le64 chunk_objectid;
1096 } __attribute__ ((__packed__));
1098 struct btrfs_free_space_info {
1099 __le32 extent_count;
1101 } __attribute__ ((__packed__));
1103 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1105 #define BTRFS_QGROUP_LEVEL_SHIFT 48
1106 static inline u64 btrfs_qgroup_level(u64 qgroupid)
1108 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1112 * is subvolume quota turned on?
1114 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1116 * RESCAN is set during the initialization phase
1118 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1120 * Some qgroup entries are known to be out of date,
1121 * either because the configuration has changed in a way that
1122 * makes a rescan necessary, or because the fs has been mounted
1123 * with a non-qgroup-aware version.
1124 * Turning qouta off and on again makes it inconsistent, too.
1126 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1128 #define BTRFS_QGROUP_STATUS_VERSION 1
1130 struct btrfs_qgroup_status_item {
1133 * the generation is updated during every commit. As older
1134 * versions of btrfs are not aware of qgroups, it will be
1135 * possible to detect inconsistencies by checking the
1136 * generation on mount time
1140 /* flag definitions see above */
1144 * only used during scanning to record the progress
1145 * of the scan. It contains a logical address
1148 } __attribute__ ((__packed__));
1150 struct btrfs_qgroup_info_item {
1156 } __attribute__ ((__packed__));
1158 /* flags definition for qgroup limits */
1159 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1160 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1161 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1162 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1163 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1164 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1166 struct btrfs_qgroup_limit_item {
1168 * only updated when any of the other values change
1175 } __attribute__ ((__packed__));
1177 /* For raid type sysfs entries */
1178 struct raid_kobject {
1180 struct kobject kobj;
1183 struct btrfs_space_info {
1186 u64 total_bytes; /* total bytes in the space,
1187 this doesn't take mirrors into account */
1188 u64 bytes_used; /* total bytes used,
1189 this doesn't take mirrors into account */
1190 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1191 transaction finishes */
1192 u64 bytes_reserved; /* total bytes the allocator has reserved for
1193 current allocations */
1194 u64 bytes_may_use; /* number of bytes that may be used for
1195 delalloc/allocations */
1196 u64 bytes_readonly; /* total bytes that are read only */
1198 u64 max_extent_size; /* This will hold the maximum extent size of
1199 the space info if we had an ENOSPC in the
1202 unsigned int full:1; /* indicates that we cannot allocate any more
1203 chunks for this space */
1204 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1206 unsigned int flush:1; /* set if we are trying to make space */
1208 unsigned int force_alloc; /* set if we need to force a chunk
1209 alloc for this space */
1211 u64 disk_used; /* total bytes used on disk */
1212 u64 disk_total; /* total bytes on disk, takes mirrors into
1218 * bytes_pinned is kept in line with what is actually pinned, as in
1219 * we've called update_block_group and dropped the bytes_used counter
1220 * and increased the bytes_pinned counter. However this means that
1221 * bytes_pinned does not reflect the bytes that will be pinned once the
1222 * delayed refs are flushed, so this counter is inc'ed every time we
1223 * call btrfs_free_extent so it is a realtime count of what will be
1224 * freed once the transaction is committed. It will be zero'ed every
1225 * time the transaction commits.
1227 struct percpu_counter total_bytes_pinned;
1229 struct list_head list;
1230 /* Protected by the spinlock 'lock'. */
1231 struct list_head ro_bgs;
1233 struct rw_semaphore groups_sem;
1234 /* for block groups in our same type */
1235 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1236 wait_queue_head_t wait;
1238 struct kobject kobj;
1239 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1242 #define BTRFS_BLOCK_RSV_GLOBAL 1
1243 #define BTRFS_BLOCK_RSV_DELALLOC 2
1244 #define BTRFS_BLOCK_RSV_TRANS 3
1245 #define BTRFS_BLOCK_RSV_CHUNK 4
1246 #define BTRFS_BLOCK_RSV_DELOPS 5
1247 #define BTRFS_BLOCK_RSV_EMPTY 6
1248 #define BTRFS_BLOCK_RSV_TEMP 7
1250 struct btrfs_block_rsv {
1253 struct btrfs_space_info *space_info;
1255 unsigned short full;
1256 unsigned short type;
1257 unsigned short failfast;
1261 * free clusters are used to claim free space in relatively large chunks,
1262 * allowing us to do less seeky writes. They are used for all metadata
1263 * allocations and data allocations in ssd mode.
1265 struct btrfs_free_cluster {
1267 spinlock_t refill_lock;
1268 struct rb_root root;
1270 /* largest extent in this cluster */
1273 /* first extent starting offset */
1276 /* We did a full search and couldn't create a cluster */
1279 struct btrfs_block_group_cache *block_group;
1281 * when a cluster is allocated from a block group, we put the
1282 * cluster onto a list in the block group so that it can
1283 * be freed before the block group is freed.
1285 struct list_head block_group_list;
1288 enum btrfs_caching_type {
1290 BTRFS_CACHE_STARTED = 1,
1291 BTRFS_CACHE_FAST = 2,
1292 BTRFS_CACHE_FINISHED = 3,
1293 BTRFS_CACHE_ERROR = 4,
1296 enum btrfs_disk_cache_state {
1297 BTRFS_DC_WRITTEN = 0,
1303 struct btrfs_caching_control {
1304 struct list_head list;
1306 wait_queue_head_t wait;
1307 struct btrfs_work work;
1308 struct btrfs_block_group_cache *block_group;
1313 /* Once caching_thread() finds this much free space, it will wake up waiters. */
1314 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
1316 struct btrfs_io_ctl {
1319 struct page **pages;
1320 struct btrfs_root *root;
1321 struct inode *inode;
1327 unsigned check_crcs:1;
1330 struct btrfs_block_group_cache {
1331 struct btrfs_key key;
1332 struct btrfs_block_group_item item;
1333 struct btrfs_fs_info *fs_info;
1334 struct inode *inode;
1341 u64 cache_generation;
1345 * If the free space extent count exceeds this number, convert the block
1348 u32 bitmap_high_thresh;
1351 * If the free space extent count drops below this number, convert the
1352 * block group back to extents.
1354 u32 bitmap_low_thresh;
1357 * It is just used for the delayed data space allocation because
1358 * only the data space allocation and the relative metadata update
1359 * can be done cross the transaction.
1361 struct rw_semaphore data_rwsem;
1363 /* for raid56, this is a full stripe, without parity */
1364 unsigned long full_stripe_len;
1367 unsigned int iref:1;
1368 unsigned int has_caching_ctl:1;
1369 unsigned int removed:1;
1371 int disk_cache_state;
1373 /* cache tracking stuff */
1375 struct btrfs_caching_control *caching_ctl;
1376 u64 last_byte_to_unpin;
1378 struct btrfs_space_info *space_info;
1380 /* free space cache stuff */
1381 struct btrfs_free_space_ctl *free_space_ctl;
1383 /* block group cache stuff */
1384 struct rb_node cache_node;
1386 /* for block groups in the same raid type */
1387 struct list_head list;
1392 /* List of struct btrfs_free_clusters for this block group.
1393 * Today it will only have one thing on it, but that may change
1395 struct list_head cluster_list;
1397 /* For delayed block group creation or deletion of empty block groups */
1398 struct list_head bg_list;
1400 /* For read-only block groups */
1401 struct list_head ro_list;
1405 /* For dirty block groups */
1406 struct list_head dirty_list;
1407 struct list_head io_list;
1409 struct btrfs_io_ctl io_ctl;
1412 * Incremented when doing extent allocations and holding a read lock
1413 * on the space_info's groups_sem semaphore.
1414 * Decremented when an ordered extent that represents an IO against this
1415 * block group's range is created (after it's added to its inode's
1416 * root's list of ordered extents) or immediately after the allocation
1417 * if it's a metadata extent or fallocate extent (for these cases we
1418 * don't create ordered extents).
1420 atomic_t reservations;
1422 /* Lock for free space tree operations. */
1423 struct mutex free_space_lock;
1426 * Does the block group need to be added to the free space tree?
1427 * Protected by free_space_lock.
1429 int needs_free_space;
1432 /* delayed seq elem */
1434 struct list_head list;
1438 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1440 enum btrfs_orphan_cleanup_state {
1441 ORPHAN_CLEANUP_STARTED = 1,
1442 ORPHAN_CLEANUP_DONE = 2,
1445 /* used by the raid56 code to lock stripes for read/modify/write */
1446 struct btrfs_stripe_hash {
1447 struct list_head hash_list;
1448 wait_queue_head_t wait;
1452 /* used by the raid56 code to lock stripes for read/modify/write */
1453 struct btrfs_stripe_hash_table {
1454 struct list_head stripe_cache;
1455 spinlock_t cache_lock;
1457 struct btrfs_stripe_hash table[];
1460 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1462 void btrfs_init_async_reclaim_work(struct work_struct *work);
1465 struct reloc_control;
1466 struct btrfs_device;
1467 struct btrfs_fs_devices;
1468 struct btrfs_balance_control;
1469 struct btrfs_delayed_root;
1470 struct btrfs_fs_info {
1471 u8 fsid[BTRFS_FSID_SIZE];
1472 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1473 struct btrfs_root *extent_root;
1474 struct btrfs_root *tree_root;
1475 struct btrfs_root *chunk_root;
1476 struct btrfs_root *dev_root;
1477 struct btrfs_root *fs_root;
1478 struct btrfs_root *csum_root;
1479 struct btrfs_root *quota_root;
1480 struct btrfs_root *uuid_root;
1481 struct btrfs_root *free_space_root;
1483 /* the log root tree is a directory of all the other log roots */
1484 struct btrfs_root *log_root_tree;
1486 spinlock_t fs_roots_radix_lock;
1487 struct radix_tree_root fs_roots_radix;
1489 /* block group cache stuff */
1490 spinlock_t block_group_cache_lock;
1491 u64 first_logical_byte;
1492 struct rb_root block_group_cache_tree;
1494 /* keep track of unallocated space */
1495 spinlock_t free_chunk_lock;
1496 u64 free_chunk_space;
1498 struct extent_io_tree freed_extents[2];
1499 struct extent_io_tree *pinned_extents;
1501 /* logical->physical extent mapping */
1502 struct btrfs_mapping_tree mapping_tree;
1505 * block reservation for extent, checksum, root tree and
1506 * delayed dir index item
1508 struct btrfs_block_rsv global_block_rsv;
1509 /* block reservation for delay allocation */
1510 struct btrfs_block_rsv delalloc_block_rsv;
1511 /* block reservation for metadata operations */
1512 struct btrfs_block_rsv trans_block_rsv;
1513 /* block reservation for chunk tree */
1514 struct btrfs_block_rsv chunk_block_rsv;
1515 /* block reservation for delayed operations */
1516 struct btrfs_block_rsv delayed_block_rsv;
1518 struct btrfs_block_rsv empty_block_rsv;
1521 u64 last_trans_committed;
1522 u64 avg_delayed_ref_runtime;
1525 * this is updated to the current trans every time a full commit
1526 * is required instead of the faster short fsync log commits
1528 u64 last_trans_log_full_commit;
1529 unsigned long mount_opt;
1531 * Track requests for actions that need to be done during transaction
1532 * commit (like for some mount options).
1534 unsigned long pending_changes;
1535 unsigned long compress_type:4;
1536 int commit_interval;
1538 * It is a suggestive number, the read side is safe even it gets a
1539 * wrong number because we will write out the data into a regular
1540 * extent. The write side(mount/remount) is under ->s_umount lock,
1541 * so it is also safe.
1545 * Protected by ->chunk_mutex and sb->s_umount.
1547 * The reason that we use two lock to protect it is because only
1548 * remount and mount operations can change it and these two operations
1549 * are under sb->s_umount, but the read side (chunk allocation) can not
1550 * acquire sb->s_umount or the deadlock would happen. So we use two
1551 * locks to protect it. On the write side, we must acquire two locks,
1552 * and on the read side, we just need acquire one of them.
1555 struct btrfs_transaction *running_transaction;
1556 wait_queue_head_t transaction_throttle;
1557 wait_queue_head_t transaction_wait;
1558 wait_queue_head_t transaction_blocked_wait;
1559 wait_queue_head_t async_submit_wait;
1562 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1563 * when they are updated.
1565 * Because we do not clear the flags for ever, so we needn't use
1566 * the lock on the read side.
1568 * We also needn't use the lock when we mount the fs, because
1569 * there is no other task which will update the flag.
1571 spinlock_t super_lock;
1572 struct btrfs_super_block *super_copy;
1573 struct btrfs_super_block *super_for_commit;
1574 struct block_device *__bdev;
1575 struct super_block *sb;
1576 struct inode *btree_inode;
1577 struct backing_dev_info bdi;
1578 struct mutex tree_log_mutex;
1579 struct mutex transaction_kthread_mutex;
1580 struct mutex cleaner_mutex;
1581 struct mutex chunk_mutex;
1582 struct mutex volume_mutex;
1585 * this is taken to make sure we don't set block groups ro after
1586 * the free space cache has been allocated on them
1588 struct mutex ro_block_group_mutex;
1590 /* this is used during read/modify/write to make sure
1591 * no two ios are trying to mod the same stripe at the same
1594 struct btrfs_stripe_hash_table *stripe_hash_table;
1597 * this protects the ordered operations list only while we are
1598 * processing all of the entries on it. This way we make
1599 * sure the commit code doesn't find the list temporarily empty
1600 * because another function happens to be doing non-waiting preflush
1601 * before jumping into the main commit.
1603 struct mutex ordered_operations_mutex;
1605 struct rw_semaphore commit_root_sem;
1607 struct rw_semaphore cleanup_work_sem;
1609 struct rw_semaphore subvol_sem;
1610 struct srcu_struct subvol_srcu;
1612 spinlock_t trans_lock;
1614 * the reloc mutex goes with the trans lock, it is taken
1615 * during commit to protect us from the relocation code
1617 struct mutex reloc_mutex;
1619 struct list_head trans_list;
1620 struct list_head dead_roots;
1621 struct list_head caching_block_groups;
1623 spinlock_t delayed_iput_lock;
1624 struct list_head delayed_iputs;
1625 struct mutex cleaner_delayed_iput_mutex;
1627 /* this protects tree_mod_seq_list */
1628 spinlock_t tree_mod_seq_lock;
1629 atomic64_t tree_mod_seq;
1630 struct list_head tree_mod_seq_list;
1632 /* this protects tree_mod_log */
1633 rwlock_t tree_mod_log_lock;
1634 struct rb_root tree_mod_log;
1636 atomic_t nr_async_submits;
1637 atomic_t async_submit_draining;
1638 atomic_t nr_async_bios;
1639 atomic_t async_delalloc_pages;
1640 atomic_t open_ioctl_trans;
1643 * this is used to protect the following list -- ordered_roots.
1645 spinlock_t ordered_root_lock;
1648 * all fs/file tree roots in which there are data=ordered extents
1649 * pending writeback are added into this list.
1651 * these can span multiple transactions and basically include
1652 * every dirty data page that isn't from nodatacow
1654 struct list_head ordered_roots;
1656 struct mutex delalloc_root_mutex;
1657 spinlock_t delalloc_root_lock;
1658 /* all fs/file tree roots that have delalloc inodes. */
1659 struct list_head delalloc_roots;
1662 * there is a pool of worker threads for checksumming during writes
1663 * and a pool for checksumming after reads. This is because readers
1664 * can run with FS locks held, and the writers may be waiting for
1665 * those locks. We don't want ordering in the pending list to cause
1666 * deadlocks, and so the two are serviced separately.
1668 * A third pool does submit_bio to avoid deadlocking with the other
1671 struct btrfs_workqueue *workers;
1672 struct btrfs_workqueue *delalloc_workers;
1673 struct btrfs_workqueue *flush_workers;
1674 struct btrfs_workqueue *endio_workers;
1675 struct btrfs_workqueue *endio_meta_workers;
1676 struct btrfs_workqueue *endio_raid56_workers;
1677 struct btrfs_workqueue *endio_repair_workers;
1678 struct btrfs_workqueue *rmw_workers;
1679 struct btrfs_workqueue *endio_meta_write_workers;
1680 struct btrfs_workqueue *endio_write_workers;
1681 struct btrfs_workqueue *endio_freespace_worker;
1682 struct btrfs_workqueue *submit_workers;
1683 struct btrfs_workqueue *caching_workers;
1684 struct btrfs_workqueue *readahead_workers;
1687 * fixup workers take dirty pages that didn't properly go through
1688 * the cow mechanism and make them safe to write. It happens
1689 * for the sys_munmap function call path
1691 struct btrfs_workqueue *fixup_workers;
1692 struct btrfs_workqueue *delayed_workers;
1694 /* the extent workers do delayed refs on the extent allocation tree */
1695 struct btrfs_workqueue *extent_workers;
1696 struct task_struct *transaction_kthread;
1697 struct task_struct *cleaner_kthread;
1698 int thread_pool_size;
1700 struct kobject *space_info_kobj;
1703 int log_root_recovering;
1708 /* used to keep from writing metadata until there is a nice batch */
1709 struct percpu_counter dirty_metadata_bytes;
1710 struct percpu_counter delalloc_bytes;
1711 s32 dirty_metadata_batch;
1714 struct list_head dirty_cowonly_roots;
1716 struct btrfs_fs_devices *fs_devices;
1719 * the space_info list is almost entirely read only. It only changes
1720 * when we add a new raid type to the FS, and that happens
1721 * very rarely. RCU is used to protect it.
1723 struct list_head space_info;
1725 struct btrfs_space_info *data_sinfo;
1727 struct reloc_control *reloc_ctl;
1729 /* data_alloc_cluster is only used in ssd mode */
1730 struct btrfs_free_cluster data_alloc_cluster;
1732 /* all metadata allocations go through this cluster */
1733 struct btrfs_free_cluster meta_alloc_cluster;
1735 /* auto defrag inodes go here */
1736 spinlock_t defrag_inodes_lock;
1737 struct rb_root defrag_inodes;
1738 atomic_t defrag_running;
1740 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1741 seqlock_t profiles_lock;
1743 * these three are in extended format (availability of single
1744 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1745 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1747 u64 avail_data_alloc_bits;
1748 u64 avail_metadata_alloc_bits;
1749 u64 avail_system_alloc_bits;
1751 /* restriper state */
1752 spinlock_t balance_lock;
1753 struct mutex balance_mutex;
1754 atomic_t balance_running;
1755 atomic_t balance_pause_req;
1756 atomic_t balance_cancel_req;
1757 struct btrfs_balance_control *balance_ctl;
1758 wait_queue_head_t balance_wait_q;
1760 unsigned data_chunk_allocations;
1761 unsigned metadata_ratio;
1765 /* private scrub information */
1766 struct mutex scrub_lock;
1767 atomic_t scrubs_running;
1768 atomic_t scrub_pause_req;
1769 atomic_t scrubs_paused;
1770 atomic_t scrub_cancel_req;
1771 wait_queue_head_t scrub_pause_wait;
1772 int scrub_workers_refcnt;
1773 struct btrfs_workqueue *scrub_workers;
1774 struct btrfs_workqueue *scrub_wr_completion_workers;
1775 struct btrfs_workqueue *scrub_nocow_workers;
1776 struct btrfs_workqueue *scrub_parity_workers;
1778 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1779 u32 check_integrity_print_mask;
1784 unsigned int quota_enabled:1;
1787 * quota_enabled only changes state after a commit. This holds the
1790 unsigned int pending_quota_state:1;
1792 /* is qgroup tracking in a consistent state? */
1795 /* holds configuration and tracking. Protected by qgroup_lock */
1796 struct rb_root qgroup_tree;
1797 struct rb_root qgroup_op_tree;
1798 spinlock_t qgroup_lock;
1799 spinlock_t qgroup_op_lock;
1800 atomic_t qgroup_op_seq;
1803 * used to avoid frequently calling ulist_alloc()/ulist_free()
1804 * when doing qgroup accounting, it must be protected by qgroup_lock.
1806 struct ulist *qgroup_ulist;
1808 /* protect user change for quota operations */
1809 struct mutex qgroup_ioctl_lock;
1811 /* list of dirty qgroups to be written at next commit */
1812 struct list_head dirty_qgroups;
1814 /* used by qgroup for an efficient tree traversal */
1817 /* qgroup rescan items */
1818 struct mutex qgroup_rescan_lock; /* protects the progress item */
1819 struct btrfs_key qgroup_rescan_progress;
1820 struct btrfs_workqueue *qgroup_rescan_workers;
1821 struct completion qgroup_rescan_completion;
1822 struct btrfs_work qgroup_rescan_work;
1824 /* filesystem state */
1825 unsigned long fs_state;
1827 struct btrfs_delayed_root *delayed_root;
1829 /* readahead tree */
1830 spinlock_t reada_lock;
1831 struct radix_tree_root reada_tree;
1833 /* readahead works cnt */
1834 atomic_t reada_works_cnt;
1836 /* Extent buffer radix tree */
1837 spinlock_t buffer_lock;
1838 struct radix_tree_root buffer_radix;
1840 /* next backup root to be overwritten */
1841 int backup_root_index;
1843 int num_tolerated_disk_barrier_failures;
1845 /* device replace state */
1846 struct btrfs_dev_replace dev_replace;
1848 atomic_t mutually_exclusive_operation_running;
1850 struct percpu_counter bio_counter;
1851 wait_queue_head_t replace_wait;
1853 struct semaphore uuid_tree_rescan_sem;
1854 unsigned int update_uuid_tree_gen:1;
1856 /* Used to reclaim the metadata space in the background. */
1857 struct work_struct async_reclaim_work;
1859 spinlock_t unused_bgs_lock;
1860 struct list_head unused_bgs;
1861 struct mutex unused_bg_unpin_mutex;
1862 struct mutex delete_unused_bgs_mutex;
1864 /* For btrfs to record security options */
1865 struct security_mnt_opts security_opts;
1868 * Chunks that can't be freed yet (under a trim/discard operation)
1869 * and will be latter freed. Protected by fs_info->chunk_mutex.
1871 struct list_head pinned_chunks;
1873 int creating_free_space_tree;
1876 struct btrfs_subvolume_writers {
1877 struct percpu_counter counter;
1878 wait_queue_head_t wait;
1882 * The state of btrfs root
1885 * btrfs_record_root_in_trans is a multi-step process,
1886 * and it can race with the balancing code. But the
1887 * race is very small, and only the first time the root
1888 * is added to each transaction. So IN_TRANS_SETUP
1889 * is used to tell us when more checks are required
1891 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1892 #define BTRFS_ROOT_REF_COWS 1
1893 #define BTRFS_ROOT_TRACK_DIRTY 2
1894 #define BTRFS_ROOT_IN_RADIX 3
1895 #define BTRFS_ROOT_DUMMY_ROOT 4
1896 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1897 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1898 #define BTRFS_ROOT_FORCE_COW 7
1899 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1900 #define BTRFS_ROOT_DIRTY 9
1903 * in ram representation of the tree. extent_root is used for all allocations
1904 * and for the extent tree extent_root root.
1907 struct extent_buffer *node;
1909 struct extent_buffer *commit_root;
1910 struct btrfs_root *log_root;
1911 struct btrfs_root *reloc_root;
1913 unsigned long state;
1914 struct btrfs_root_item root_item;
1915 struct btrfs_key root_key;
1916 struct btrfs_fs_info *fs_info;
1917 struct extent_io_tree dirty_log_pages;
1919 struct mutex objectid_mutex;
1921 spinlock_t accounting_lock;
1922 struct btrfs_block_rsv *block_rsv;
1924 /* free ino cache stuff */
1925 struct btrfs_free_space_ctl *free_ino_ctl;
1926 enum btrfs_caching_type ino_cache_state;
1927 spinlock_t ino_cache_lock;
1928 wait_queue_head_t ino_cache_wait;
1929 struct btrfs_free_space_ctl *free_ino_pinned;
1930 u64 ino_cache_progress;
1931 struct inode *ino_cache_inode;
1933 struct mutex log_mutex;
1934 wait_queue_head_t log_writer_wait;
1935 wait_queue_head_t log_commit_wait[2];
1936 struct list_head log_ctxs[2];
1937 atomic_t log_writers;
1938 atomic_t log_commit[2];
1941 /* No matter the commit succeeds or not*/
1942 int log_transid_committed;
1943 /* Just be updated when the commit succeeds. */
1944 int last_log_commit;
1945 pid_t log_start_pid;
1950 /* data allocations are done in sectorsize units */
1953 /* node allocations are done in nodesize units */
1960 u64 highest_objectid;
1962 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1965 u64 defrag_trans_start;
1966 struct btrfs_key defrag_progress;
1967 struct btrfs_key defrag_max;
1970 /* the dirty list is only used by non-reference counted roots */
1971 struct list_head dirty_list;
1973 struct list_head root_list;
1975 spinlock_t log_extents_lock[2];
1976 struct list_head logged_list[2];
1978 spinlock_t orphan_lock;
1979 atomic_t orphan_inodes;
1980 struct btrfs_block_rsv *orphan_block_rsv;
1981 int orphan_cleanup_state;
1983 spinlock_t inode_lock;
1984 /* red-black tree that keeps track of in-memory inodes */
1985 struct rb_root inode_tree;
1988 * radix tree that keeps track of delayed nodes of every inode,
1989 * protected by inode_lock
1991 struct radix_tree_root delayed_nodes_tree;
1993 * right now this just gets used so that a root has its own devid
1994 * for stat. It may be used for more later
1998 spinlock_t root_item_lock;
2001 struct mutex delalloc_mutex;
2002 spinlock_t delalloc_lock;
2004 * all of the inodes that have delalloc bytes. It is possible for
2005 * this list to be empty even when there is still dirty data=ordered
2006 * extents waiting to finish IO.
2008 struct list_head delalloc_inodes;
2009 struct list_head delalloc_root;
2010 u64 nr_delalloc_inodes;
2012 struct mutex ordered_extent_mutex;
2014 * this is used by the balancing code to wait for all the pending
2017 spinlock_t ordered_extent_lock;
2020 * all of the data=ordered extents pending writeback
2021 * these can span multiple transactions and basically include
2022 * every dirty data page that isn't from nodatacow
2024 struct list_head ordered_extents;
2025 struct list_head ordered_root;
2026 u64 nr_ordered_extents;
2029 * Number of currently running SEND ioctls to prevent
2030 * manipulation with the read-only status via SUBVOL_SETFLAGS
2032 int send_in_progress;
2033 struct btrfs_subvolume_writers *subv_writers;
2034 atomic_t will_be_snapshoted;
2036 /* For qgroup metadata space reserve */
2037 atomic_t qgroup_meta_rsv;
2040 struct btrfs_ioctl_defrag_range_args {
2041 /* start of the defrag operation */
2044 /* number of bytes to defrag, use (u64)-1 to say all */
2048 * flags for the operation, which can include turning
2049 * on compression for this one defrag
2054 * any extent bigger than this will be considered
2055 * already defragged. Use 0 to take the kernel default
2056 * Use 1 to say every single extent must be rewritten
2058 __u32 extent_thresh;
2061 * which compression method to use if turning on compression
2062 * for this defrag operation. If unspecified, zlib will
2065 __u32 compress_type;
2067 /* spare for later */
2073 * inode items have the data typically returned from stat and store other
2074 * info about object characteristics. There is one for every file and dir in
2077 #define BTRFS_INODE_ITEM_KEY 1
2078 #define BTRFS_INODE_REF_KEY 12
2079 #define BTRFS_INODE_EXTREF_KEY 13
2080 #define BTRFS_XATTR_ITEM_KEY 24
2081 #define BTRFS_ORPHAN_ITEM_KEY 48
2082 /* reserve 2-15 close to the inode for later flexibility */
2085 * dir items are the name -> inode pointers in a directory. There is one
2086 * for every name in a directory.
2088 #define BTRFS_DIR_LOG_ITEM_KEY 60
2089 #define BTRFS_DIR_LOG_INDEX_KEY 72
2090 #define BTRFS_DIR_ITEM_KEY 84
2091 #define BTRFS_DIR_INDEX_KEY 96
2093 * extent data is for file data
2095 #define BTRFS_EXTENT_DATA_KEY 108
2098 * extent csums are stored in a separate tree and hold csums for
2099 * an entire extent on disk.
2101 #define BTRFS_EXTENT_CSUM_KEY 128
2104 * root items point to tree roots. They are typically in the root
2105 * tree used by the super block to find all the other trees
2107 #define BTRFS_ROOT_ITEM_KEY 132
2110 * root backrefs tie subvols and snapshots to the directory entries that
2113 #define BTRFS_ROOT_BACKREF_KEY 144
2116 * root refs make a fast index for listing all of the snapshots and
2117 * subvolumes referenced by a given root. They point directly to the
2118 * directory item in the root that references the subvol
2120 #define BTRFS_ROOT_REF_KEY 156
2123 * extent items are in the extent map tree. These record which blocks
2124 * are used, and how many references there are to each block
2126 #define BTRFS_EXTENT_ITEM_KEY 168
2129 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2130 * the length, so we save the level in key->offset instead of the length.
2132 #define BTRFS_METADATA_ITEM_KEY 169
2134 #define BTRFS_TREE_BLOCK_REF_KEY 176
2136 #define BTRFS_EXTENT_DATA_REF_KEY 178
2138 #define BTRFS_EXTENT_REF_V0_KEY 180
2140 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2142 #define BTRFS_SHARED_DATA_REF_KEY 184
2145 * block groups give us hints into the extent allocation trees. Which
2146 * blocks are free etc etc
2148 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2151 * Every block group is represented in the free space tree by a free space info
2152 * item, which stores some accounting information. It is keyed on
2153 * (block_group_start, FREE_SPACE_INFO, block_group_length).
2155 #define BTRFS_FREE_SPACE_INFO_KEY 198
2158 * A free space extent tracks an extent of space that is free in a block group.
2159 * It is keyed on (start, FREE_SPACE_EXTENT, length).
2161 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
2164 * When a block group becomes very fragmented, we convert it to use bitmaps
2165 * instead of extents. A free space bitmap is keyed on
2166 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
2167 * (length / sectorsize) bits.
2169 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
2171 #define BTRFS_DEV_EXTENT_KEY 204
2172 #define BTRFS_DEV_ITEM_KEY 216
2173 #define BTRFS_CHUNK_ITEM_KEY 228
2176 * Records the overall state of the qgroups.
2177 * There's only one instance of this key present,
2178 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2180 #define BTRFS_QGROUP_STATUS_KEY 240
2182 * Records the currently used space of the qgroup.
2183 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2185 #define BTRFS_QGROUP_INFO_KEY 242
2187 * Contains the user configured limits for the qgroup.
2188 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2190 #define BTRFS_QGROUP_LIMIT_KEY 244
2192 * Records the child-parent relationship of qgroups. For
2193 * each relation, 2 keys are present:
2194 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2195 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2197 #define BTRFS_QGROUP_RELATION_KEY 246
2200 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
2202 #define BTRFS_BALANCE_ITEM_KEY 248
2205 * The key type for tree items that are stored persistently, but do not need to
2206 * exist for extended period of time. The items can exist in any tree.
2208 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
2212 * - balance status item
2213 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
2215 #define BTRFS_TEMPORARY_ITEM_KEY 248
2218 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
2220 #define BTRFS_DEV_STATS_KEY 249
2223 * The key type for tree items that are stored persistently and usually exist
2224 * for a long period, eg. filesystem lifetime. The item kinds can be status
2225 * information, stats or preference values. The item can exist in any tree.
2227 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
2231 * - device statistics, store IO stats in the device tree, one key for all
2233 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
2235 #define BTRFS_PERSISTENT_ITEM_KEY 249
2238 * Persistantly stores the device replace state in the device tree.
2239 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2241 #define BTRFS_DEV_REPLACE_KEY 250
2244 * Stores items that allow to quickly map UUIDs to something else.
2245 * These items are part of the filesystem UUID tree.
2246 * The key is built like this:
2247 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2249 #if BTRFS_UUID_SIZE != 16
2250 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2252 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2253 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2254 * received subvols */
2257 * string items are for debugging. They just store a short string of
2260 #define BTRFS_STRING_ITEM_KEY 253
2263 * Flags for mount options.
2265 * Note: don't forget to add new options to btrfs_show_options()
2267 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2268 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2269 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2270 #define BTRFS_MOUNT_SSD (1 << 3)
2271 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2272 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2273 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2274 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2275 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2276 #define BTRFS_MOUNT_NOSSD (1 << 9)
2277 #define BTRFS_MOUNT_DISCARD (1 << 10)
2278 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2279 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2280 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2281 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2282 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2283 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2284 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2285 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
2286 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2287 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2288 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2289 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2290 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2291 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
2292 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
2293 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
2294 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
2296 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2297 #define BTRFS_DEFAULT_MAX_INLINE (2048)
2299 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2300 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2301 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2302 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2305 #define btrfs_set_and_info(root, opt, fmt, args...) \
2307 if (!btrfs_test_opt(root, opt)) \
2308 btrfs_info(root->fs_info, fmt, ##args); \
2309 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2312 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2314 if (btrfs_test_opt(root, opt)) \
2315 btrfs_info(root->fs_info, fmt, ##args); \
2316 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2319 #ifdef CONFIG_BTRFS_DEBUG
2321 btrfs_should_fragment_free_space(struct btrfs_root *root,
2322 struct btrfs_block_group_cache *block_group)
2324 return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
2325 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
2326 (btrfs_test_opt(root, FRAGMENT_DATA) &&
2327 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
2332 * Requests for changes that need to be done during transaction commit.
2334 * Internal mount options that are used for special handling of the real
2335 * mount options (eg. cannot be set during remount and have to be set during
2336 * transaction commit)
2339 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2340 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2341 #define BTRFS_PENDING_COMMIT (2)
2343 #define btrfs_test_pending(info, opt) \
2344 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2345 #define btrfs_set_pending(info, opt) \
2346 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2347 #define btrfs_clear_pending(info, opt) \
2348 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2351 * Helpers for setting pending mount option changes.
2353 * Expects corresponding macros
2354 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2356 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2358 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2359 btrfs_info((info), fmt, ##args); \
2360 btrfs_set_pending((info), SET_##opt); \
2361 btrfs_clear_pending((info), CLEAR_##opt); \
2365 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2367 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2368 btrfs_info((info), fmt, ##args); \
2369 btrfs_set_pending((info), CLEAR_##opt); \
2370 btrfs_clear_pending((info), SET_##opt); \
2377 #define BTRFS_INODE_NODATASUM (1 << 0)
2378 #define BTRFS_INODE_NODATACOW (1 << 1)
2379 #define BTRFS_INODE_READONLY (1 << 2)
2380 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2381 #define BTRFS_INODE_PREALLOC (1 << 4)
2382 #define BTRFS_INODE_SYNC (1 << 5)
2383 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2384 #define BTRFS_INODE_APPEND (1 << 7)
2385 #define BTRFS_INODE_NODUMP (1 << 8)
2386 #define BTRFS_INODE_NOATIME (1 << 9)
2387 #define BTRFS_INODE_DIRSYNC (1 << 10)
2388 #define BTRFS_INODE_COMPRESS (1 << 11)
2390 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2392 struct btrfs_map_token {
2393 struct extent_buffer *eb;
2395 unsigned long offset;
2398 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
2399 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
2401 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2403 token->kaddr = NULL;
2406 /* some macros to generate set/get funcs for the struct fields. This
2407 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2410 #define le8_to_cpu(v) (v)
2411 #define cpu_to_le8(v) (v)
2414 #define read_eb_member(eb, ptr, type, member, result) ( \
2415 read_extent_buffer(eb, (char *)(result), \
2416 ((unsigned long)(ptr)) + \
2417 offsetof(type, member), \
2418 sizeof(((type *)0)->member)))
2420 #define write_eb_member(eb, ptr, type, member, result) ( \
2421 write_extent_buffer(eb, (char *)(result), \
2422 ((unsigned long)(ptr)) + \
2423 offsetof(type, member), \
2424 sizeof(((type *)0)->member)))
2426 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2427 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2428 unsigned long off, \
2429 struct btrfs_map_token *token); \
2430 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2431 unsigned long off, u##bits val, \
2432 struct btrfs_map_token *token); \
2433 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2434 unsigned long off) \
2436 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2438 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2439 unsigned long off, u##bits val) \
2441 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2444 DECLARE_BTRFS_SETGET_BITS(8)
2445 DECLARE_BTRFS_SETGET_BITS(16)
2446 DECLARE_BTRFS_SETGET_BITS(32)
2447 DECLARE_BTRFS_SETGET_BITS(64)
2449 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2450 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2452 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2453 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2455 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2458 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2459 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2461 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2462 struct btrfs_map_token *token) \
2464 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2465 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2467 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2468 type *s, u##bits val, \
2469 struct btrfs_map_token *token) \
2471 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2472 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2475 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2476 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2478 type *p = page_address(eb->pages[0]); \
2479 u##bits res = le##bits##_to_cpu(p->member); \
2482 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2485 type *p = page_address(eb->pages[0]); \
2486 p->member = cpu_to_le##bits(val); \
2489 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2490 static inline u##bits btrfs_##name(type *s) \
2492 return le##bits##_to_cpu(s->member); \
2494 static inline void btrfs_set_##name(type *s, u##bits val) \
2496 s->member = cpu_to_le##bits(val); \
2499 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2500 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2501 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2502 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2503 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2504 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2506 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2507 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2508 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2509 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2510 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2511 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2513 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2514 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2516 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2518 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2520 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2522 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2524 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2525 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2527 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2529 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2531 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2534 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2536 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2539 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2541 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2544 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2545 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2546 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2547 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2548 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2549 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2550 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2551 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2552 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2553 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2554 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2556 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2558 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2561 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2565 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2567 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2569 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2571 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2572 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2574 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2576 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2577 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2579 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2582 unsigned long offset = (unsigned long)c;
2583 offset += offsetof(struct btrfs_chunk, stripe);
2584 offset += nr * sizeof(struct btrfs_stripe);
2585 return (struct btrfs_stripe *)offset;
2588 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2590 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2593 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2594 struct btrfs_chunk *c, int nr)
2596 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2599 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2600 struct btrfs_chunk *c, int nr)
2602 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2605 /* struct btrfs_block_group_item */
2606 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2608 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2610 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2611 struct btrfs_block_group_item, chunk_objectid, 64);
2613 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2614 struct btrfs_block_group_item, chunk_objectid, 64);
2615 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2616 struct btrfs_block_group_item, flags, 64);
2617 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2618 struct btrfs_block_group_item, flags, 64);
2620 /* struct btrfs_free_space_info */
2621 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
2623 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
2625 /* struct btrfs_inode_ref */
2626 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2627 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2629 /* struct btrfs_inode_extref */
2630 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2631 parent_objectid, 64);
2632 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2634 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2636 /* struct btrfs_inode_item */
2637 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2638 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2639 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2640 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2641 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2642 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2643 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2644 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2645 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2646 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2647 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2648 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2649 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2651 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2653 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2655 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2656 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2658 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2660 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2661 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2662 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2663 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2664 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2665 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2666 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2667 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2668 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2669 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2671 /* struct btrfs_dev_extent */
2672 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2674 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2675 chunk_objectid, 64);
2676 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2678 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2680 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2682 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2683 return (unsigned long)dev + ptr;
2686 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2687 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2689 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2691 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2694 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2696 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2697 struct btrfs_tree_block_info *item,
2698 struct btrfs_disk_key *key)
2700 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2703 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2704 struct btrfs_tree_block_info *item,
2705 struct btrfs_disk_key *key)
2707 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2710 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2712 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2714 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2716 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2719 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2722 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2724 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2727 static inline u32 btrfs_extent_inline_ref_size(int type)
2729 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2730 type == BTRFS_SHARED_BLOCK_REF_KEY)
2731 return sizeof(struct btrfs_extent_inline_ref);
2732 if (type == BTRFS_SHARED_DATA_REF_KEY)
2733 return sizeof(struct btrfs_shared_data_ref) +
2734 sizeof(struct btrfs_extent_inline_ref);
2735 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2736 return sizeof(struct btrfs_extent_data_ref) +
2737 offsetof(struct btrfs_extent_inline_ref, offset);
2742 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2743 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2745 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2746 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2748 /* struct btrfs_node */
2749 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2750 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2751 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2753 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2756 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2759 ptr = offsetof(struct btrfs_node, ptrs) +
2760 sizeof(struct btrfs_key_ptr) * nr;
2761 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2764 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2768 ptr = offsetof(struct btrfs_node, ptrs) +
2769 sizeof(struct btrfs_key_ptr) * nr;
2770 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2773 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2776 ptr = offsetof(struct btrfs_node, ptrs) +
2777 sizeof(struct btrfs_key_ptr) * nr;
2778 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2781 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2785 ptr = offsetof(struct btrfs_node, ptrs) +
2786 sizeof(struct btrfs_key_ptr) * nr;
2787 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2790 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2792 return offsetof(struct btrfs_node, ptrs) +
2793 sizeof(struct btrfs_key_ptr) * nr;
2796 void btrfs_node_key(struct extent_buffer *eb,
2797 struct btrfs_disk_key *disk_key, int nr);
2799 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2800 struct btrfs_disk_key *disk_key, int nr)
2803 ptr = btrfs_node_key_ptr_offset(nr);
2804 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2805 struct btrfs_key_ptr, key, disk_key);
2808 /* struct btrfs_item */
2809 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2810 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2811 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2812 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2814 static inline unsigned long btrfs_item_nr_offset(int nr)
2816 return offsetof(struct btrfs_leaf, items) +
2817 sizeof(struct btrfs_item) * nr;
2820 static inline struct btrfs_item *btrfs_item_nr(int nr)
2822 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2825 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2826 struct btrfs_item *item)
2828 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2831 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2833 return btrfs_item_end(eb, btrfs_item_nr(nr));
2836 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2838 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2841 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2843 return btrfs_item_size(eb, btrfs_item_nr(nr));
2846 static inline void btrfs_item_key(struct extent_buffer *eb,
2847 struct btrfs_disk_key *disk_key, int nr)
2849 struct btrfs_item *item = btrfs_item_nr(nr);
2850 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2853 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2854 struct btrfs_disk_key *disk_key, int nr)
2856 struct btrfs_item *item = btrfs_item_nr(nr);
2857 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2860 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2863 * struct btrfs_root_ref
2865 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2866 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2867 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2869 /* struct btrfs_dir_item */
2870 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2871 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2872 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2873 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2874 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2875 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2877 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2879 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2882 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2883 struct btrfs_dir_item *item,
2884 struct btrfs_disk_key *key)
2886 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2889 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2890 struct btrfs_dir_item *item,
2891 struct btrfs_disk_key *key)
2893 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2896 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2898 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2900 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2903 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2904 struct btrfs_free_space_header *h,
2905 struct btrfs_disk_key *key)
2907 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2910 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2911 struct btrfs_free_space_header *h,
2912 struct btrfs_disk_key *key)
2914 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2917 /* struct btrfs_disk_key */
2918 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2920 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2921 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2923 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2924 struct btrfs_disk_key *disk)
2926 cpu->offset = le64_to_cpu(disk->offset);
2927 cpu->type = disk->type;
2928 cpu->objectid = le64_to_cpu(disk->objectid);
2931 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2932 struct btrfs_key *cpu)
2934 disk->offset = cpu_to_le64(cpu->offset);
2935 disk->type = cpu->type;
2936 disk->objectid = cpu_to_le64(cpu->objectid);
2939 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2940 struct btrfs_key *key, int nr)
2942 struct btrfs_disk_key disk_key;
2943 btrfs_node_key(eb, &disk_key, nr);
2944 btrfs_disk_key_to_cpu(key, &disk_key);
2947 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2948 struct btrfs_key *key, int nr)
2950 struct btrfs_disk_key disk_key;
2951 btrfs_item_key(eb, &disk_key, nr);
2952 btrfs_disk_key_to_cpu(key, &disk_key);
2955 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2956 struct btrfs_dir_item *item,
2957 struct btrfs_key *key)
2959 struct btrfs_disk_key disk_key;
2960 btrfs_dir_item_key(eb, item, &disk_key);
2961 btrfs_disk_key_to_cpu(key, &disk_key);
2965 static inline u8 btrfs_key_type(struct btrfs_key *key)
2970 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2975 /* struct btrfs_header */
2976 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2977 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2979 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2980 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2981 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2982 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2983 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2985 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2986 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2988 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2990 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2992 return (btrfs_header_flags(eb) & flag) == flag;
2995 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2997 u64 flags = btrfs_header_flags(eb);
2998 btrfs_set_header_flags(eb, flags | flag);
2999 return (flags & flag) == flag;
3002 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
3004 u64 flags = btrfs_header_flags(eb);
3005 btrfs_set_header_flags(eb, flags & ~flag);
3006 return (flags & flag) == flag;
3009 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
3011 u64 flags = btrfs_header_flags(eb);
3012 return flags >> BTRFS_BACKREF_REV_SHIFT;
3015 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
3018 u64 flags = btrfs_header_flags(eb);
3019 flags &= ~BTRFS_BACKREF_REV_MASK;
3020 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
3021 btrfs_set_header_flags(eb, flags);
3024 static inline unsigned long btrfs_header_fsid(void)
3026 return offsetof(struct btrfs_header, fsid);
3029 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
3031 return offsetof(struct btrfs_header, chunk_tree_uuid);
3034 static inline int btrfs_is_leaf(struct extent_buffer *eb)
3036 return btrfs_header_level(eb) == 0;
3039 /* struct btrfs_root_item */
3040 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
3042 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
3043 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
3044 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
3046 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
3048 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
3049 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
3050 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
3051 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
3052 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
3053 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
3054 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
3055 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
3057 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
3059 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
3061 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
3063 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
3065 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
3068 static inline bool btrfs_root_readonly(struct btrfs_root *root)
3070 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
3073 static inline bool btrfs_root_dead(struct btrfs_root *root)
3075 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
3078 /* struct btrfs_root_backup */
3079 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
3081 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
3083 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
3084 tree_root_level, 8);
3086 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
3088 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
3089 chunk_root_gen, 64);
3090 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
3091 chunk_root_level, 8);
3093 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
3095 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
3096 extent_root_gen, 64);
3097 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
3098 extent_root_level, 8);
3100 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
3102 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
3104 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
3107 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
3109 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
3111 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
3114 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
3116 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
3118 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
3119 csum_root_level, 8);
3120 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
3122 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
3124 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
3127 /* struct btrfs_balance_item */
3128 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
3130 static inline void btrfs_balance_data(struct extent_buffer *eb,
3131 struct btrfs_balance_item *bi,
3132 struct btrfs_disk_balance_args *ba)
3134 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3137 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
3138 struct btrfs_balance_item *bi,
3139 struct btrfs_disk_balance_args *ba)
3141 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3144 static inline void btrfs_balance_meta(struct extent_buffer *eb,
3145 struct btrfs_balance_item *bi,
3146 struct btrfs_disk_balance_args *ba)
3148 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3151 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
3152 struct btrfs_balance_item *bi,
3153 struct btrfs_disk_balance_args *ba)
3155 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3158 static inline void btrfs_balance_sys(struct extent_buffer *eb,
3159 struct btrfs_balance_item *bi,
3160 struct btrfs_disk_balance_args *ba)
3162 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3165 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
3166 struct btrfs_balance_item *bi,
3167 struct btrfs_disk_balance_args *ba)
3169 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3173 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3174 struct btrfs_disk_balance_args *disk)
3176 memset(cpu, 0, sizeof(*cpu));
3178 cpu->profiles = le64_to_cpu(disk->profiles);
3179 cpu->usage = le64_to_cpu(disk->usage);
3180 cpu->devid = le64_to_cpu(disk->devid);
3181 cpu->pstart = le64_to_cpu(disk->pstart);
3182 cpu->pend = le64_to_cpu(disk->pend);
3183 cpu->vstart = le64_to_cpu(disk->vstart);
3184 cpu->vend = le64_to_cpu(disk->vend);
3185 cpu->target = le64_to_cpu(disk->target);
3186 cpu->flags = le64_to_cpu(disk->flags);
3187 cpu->limit = le64_to_cpu(disk->limit);
3191 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3192 struct btrfs_balance_args *cpu)
3194 memset(disk, 0, sizeof(*disk));
3196 disk->profiles = cpu_to_le64(cpu->profiles);
3197 disk->usage = cpu_to_le64(cpu->usage);
3198 disk->devid = cpu_to_le64(cpu->devid);
3199 disk->pstart = cpu_to_le64(cpu->pstart);
3200 disk->pend = cpu_to_le64(cpu->pend);
3201 disk->vstart = cpu_to_le64(cpu->vstart);
3202 disk->vend = cpu_to_le64(cpu->vend);
3203 disk->target = cpu_to_le64(cpu->target);
3204 disk->flags = cpu_to_le64(cpu->flags);
3205 disk->limit = cpu_to_le64(cpu->limit);
3208 /* struct btrfs_super_block */
3209 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3210 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3211 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3213 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3214 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3215 struct btrfs_super_block, sys_chunk_array_size, 32);
3216 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3217 struct btrfs_super_block, chunk_root_generation, 64);
3218 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3220 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3222 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
3223 chunk_root_level, 8);
3224 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3226 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3227 log_root_transid, 64);
3228 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3230 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3232 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3234 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3236 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3238 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3240 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3241 root_dir_objectid, 64);
3242 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3244 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3246 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
3247 compat_ro_flags, 64);
3248 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3249 incompat_flags, 64);
3250 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3252 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3253 cache_generation, 64);
3254 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3255 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3256 uuid_tree_generation, 64);
3258 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3260 u16 t = btrfs_super_csum_type(s);
3262 * csum type is validated at mount time
3264 return btrfs_csum_sizes[t];
3267 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3269 return offsetof(struct btrfs_leaf, items);
3272 /* struct btrfs_file_extent_item */
3273 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3274 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3275 struct btrfs_file_extent_item, disk_bytenr, 64);
3276 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3277 struct btrfs_file_extent_item, offset, 64);
3278 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3279 struct btrfs_file_extent_item, generation, 64);
3280 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3281 struct btrfs_file_extent_item, num_bytes, 64);
3282 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3283 struct btrfs_file_extent_item, disk_num_bytes, 64);
3284 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3285 struct btrfs_file_extent_item, compression, 8);
3287 static inline unsigned long
3288 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3290 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3293 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3295 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3298 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3300 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3302 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3303 disk_num_bytes, 64);
3304 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3306 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3308 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3310 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3312 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3314 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3315 other_encoding, 16);
3318 * this returns the number of bytes used by the item on disk, minus the
3319 * size of any extent headers. If a file is compressed on disk, this is
3320 * the compressed size
3322 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3323 struct btrfs_item *e)
3325 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
3328 /* this returns the number of file bytes represented by the inline item.
3329 * If an item is compressed, this is the uncompressed size
3331 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3333 struct btrfs_file_extent_item *fi)
3335 struct btrfs_map_token token;
3337 btrfs_init_map_token(&token);
3339 * return the space used on disk if this item isn't
3340 * compressed or encoded
3342 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3343 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3344 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3345 return btrfs_file_extent_inline_item_len(eb,
3346 btrfs_item_nr(slot));
3349 /* otherwise use the ram bytes field */
3350 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3354 /* btrfs_dev_stats_item */
3355 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3356 struct btrfs_dev_stats_item *ptr,
3361 read_extent_buffer(eb, &val,
3362 offsetof(struct btrfs_dev_stats_item, values) +
3363 ((unsigned long)ptr) + (index * sizeof(u64)),
3368 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3369 struct btrfs_dev_stats_item *ptr,
3372 write_extent_buffer(eb, &val,
3373 offsetof(struct btrfs_dev_stats_item, values) +
3374 ((unsigned long)ptr) + (index * sizeof(u64)),
3378 /* btrfs_qgroup_status_item */
3379 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3381 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3383 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3385 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3388 /* btrfs_qgroup_info_item */
3389 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3391 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3392 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3394 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3395 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3398 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3399 struct btrfs_qgroup_info_item, generation, 64);
3400 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3402 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3403 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3404 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3406 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3407 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3409 /* btrfs_qgroup_limit_item */
3410 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3412 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3414 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3416 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3418 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3421 /* btrfs_dev_replace_item */
3422 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3423 struct btrfs_dev_replace_item, src_devid, 64);
3424 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3425 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3427 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3429 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3431 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3433 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3434 num_write_errors, 64);
3435 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3436 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3438 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3440 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3443 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3444 struct btrfs_dev_replace_item, src_devid, 64);
3445 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3446 struct btrfs_dev_replace_item,
3447 cont_reading_from_srcdev_mode, 64);
3448 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3449 struct btrfs_dev_replace_item, replace_state, 64);
3450 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3451 struct btrfs_dev_replace_item, time_started, 64);
3452 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3453 struct btrfs_dev_replace_item, time_stopped, 64);
3454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3455 struct btrfs_dev_replace_item, num_write_errors, 64);
3456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3457 struct btrfs_dev_replace_item,
3458 num_uncorrectable_read_errors, 64);
3459 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3460 struct btrfs_dev_replace_item, cursor_left, 64);
3461 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3462 struct btrfs_dev_replace_item, cursor_right, 64);
3464 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3466 return sb->s_fs_info;
3469 /* helper function to cast into the data area of the leaf. */
3470 #define btrfs_item_ptr(leaf, slot, type) \
3471 ((type *)(btrfs_leaf_data(leaf) + \
3472 btrfs_item_offset_nr(leaf, slot)))
3474 #define btrfs_item_ptr_offset(leaf, slot) \
3475 ((unsigned long)(btrfs_leaf_data(leaf) + \
3476 btrfs_item_offset_nr(leaf, slot)))
3478 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3480 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3481 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3484 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3486 return mapping_gfp_constraint(mapping, ~__GFP_FS);
3491 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
3493 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3496 return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
3500 * Doing a truncate won't result in new nodes or leaves, just what we need for
3503 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3506 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3509 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3510 struct btrfs_root *root);
3511 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3512 struct btrfs_root *root);
3513 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
3515 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
3516 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3517 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3518 struct btrfs_root *root, unsigned long count);
3519 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3520 unsigned long count, int wait);
3521 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3522 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3523 struct btrfs_root *root, u64 bytenr,
3524 u64 offset, int metadata, u64 *refs, u64 *flags);
3525 int btrfs_pin_extent(struct btrfs_root *root,
3526 u64 bytenr, u64 num, int reserved);
3527 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3528 u64 bytenr, u64 num_bytes);
3529 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3530 struct extent_buffer *eb);
3531 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3532 struct btrfs_root *root,
3533 u64 objectid, u64 offset, u64 bytenr);
3534 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3535 struct btrfs_fs_info *info,
3537 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
3538 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3539 int get_block_group_index(struct btrfs_block_group_cache *cache);
3540 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3541 struct btrfs_root *root, u64 parent,
3543 struct btrfs_disk_key *key, int level,
3544 u64 hint, u64 empty_size);
3545 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3546 struct btrfs_root *root,
3547 struct extent_buffer *buf,
3548 u64 parent, int last_ref);
3549 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3550 struct btrfs_root *root,
3551 u64 root_objectid, u64 owner,
3552 u64 offset, u64 ram_bytes,
3553 struct btrfs_key *ins);
3554 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3555 struct btrfs_root *root,
3556 u64 root_objectid, u64 owner, u64 offset,
3557 struct btrfs_key *ins);
3558 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3559 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3560 struct btrfs_key *ins, int is_data, int delalloc);
3561 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3562 struct extent_buffer *buf, int full_backref);
3563 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3564 struct extent_buffer *buf, int full_backref);
3565 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3566 struct btrfs_root *root,
3567 u64 bytenr, u64 num_bytes, u64 flags,
3568 int level, int is_data);
3569 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3570 struct btrfs_root *root,
3571 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3572 u64 owner, u64 offset);
3574 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3576 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3577 u64 start, u64 len);
3578 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3579 struct btrfs_root *root);
3580 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3581 struct btrfs_root *root);
3582 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3583 struct btrfs_root *root,
3584 u64 bytenr, u64 num_bytes, u64 parent,
3585 u64 root_objectid, u64 owner, u64 offset);
3587 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
3588 struct btrfs_root *root);
3589 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3590 struct btrfs_root *root);
3591 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
3592 struct btrfs_root *root);
3593 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3594 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3595 int btrfs_read_block_groups(struct btrfs_root *root);
3596 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3597 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3598 struct btrfs_root *root, u64 bytes_used,
3599 u64 type, u64 chunk_objectid, u64 chunk_offset,
3601 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
3602 struct btrfs_fs_info *fs_info,
3603 const u64 chunk_offset);
3604 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3605 struct btrfs_root *root, u64 group_start,
3606 struct extent_map *em);
3607 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3608 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
3609 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
3610 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3611 struct btrfs_root *root);
3612 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3613 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3615 enum btrfs_reserve_flush_enum {
3616 /* If we are in the transaction, we can't flush anything.*/
3617 BTRFS_RESERVE_NO_FLUSH,
3619 * Flushing delalloc may cause deadlock somewhere, in this
3620 * case, use FLUSH LIMIT
3622 BTRFS_RESERVE_FLUSH_LIMIT,
3623 BTRFS_RESERVE_FLUSH_ALL,
3626 int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
3627 int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
3628 void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
3629 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
3631 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3632 struct btrfs_root *root);
3633 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
3634 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3635 struct inode *inode);
3636 void btrfs_orphan_release_metadata(struct inode *inode);
3637 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3638 struct btrfs_block_rsv *rsv,
3640 u64 *qgroup_reserved, bool use_global_rsv);
3641 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3642 struct btrfs_block_rsv *rsv,
3643 u64 qgroup_reserved);
3644 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3645 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3646 int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
3647 void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
3648 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3649 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3650 unsigned short type);
3651 void btrfs_free_block_rsv(struct btrfs_root *root,
3652 struct btrfs_block_rsv *rsv);
3653 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3654 int btrfs_block_rsv_add(struct btrfs_root *root,
3655 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3656 enum btrfs_reserve_flush_enum flush);
3657 int btrfs_block_rsv_check(struct btrfs_root *root,
3658 struct btrfs_block_rsv *block_rsv, int min_factor);
3659 int btrfs_block_rsv_refill(struct btrfs_root *root,
3660 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3661 enum btrfs_reserve_flush_enum flush);
3662 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3663 struct btrfs_block_rsv *dst_rsv,
3665 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3666 struct btrfs_block_rsv *dest, u64 num_bytes,
3668 void btrfs_block_rsv_release(struct btrfs_root *root,
3669 struct btrfs_block_rsv *block_rsv,
3671 int btrfs_inc_block_group_ro(struct btrfs_root *root,
3672 struct btrfs_block_group_cache *cache);
3673 void btrfs_dec_block_group_ro(struct btrfs_root *root,
3674 struct btrfs_block_group_cache *cache);
3675 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3676 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3677 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3678 u64 start, u64 end);
3679 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
3680 u64 num_bytes, u64 *actual_bytes);
3681 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3682 struct btrfs_root *root, u64 type);
3683 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3685 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3686 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3687 struct btrfs_fs_info *fs_info);
3688 int __get_raid_index(u64 flags);
3689 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3690 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3691 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
3692 void check_system_chunk(struct btrfs_trans_handle *trans,
3693 struct btrfs_root *root,
3695 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
3696 struct btrfs_fs_info *info, u64 start, u64 end);
3699 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3700 int level, int *slot);
3701 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3702 int btrfs_previous_item(struct btrfs_root *root,
3703 struct btrfs_path *path, u64 min_objectid,
3705 int btrfs_previous_extent_item(struct btrfs_root *root,
3706 struct btrfs_path *path, u64 min_objectid);
3707 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
3708 struct btrfs_path *path,
3709 struct btrfs_key *new_key);
3710 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3711 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3712 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3713 struct btrfs_key *key, int lowest_level,
3715 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3716 struct btrfs_path *path,
3718 enum btrfs_compare_tree_result {
3719 BTRFS_COMPARE_TREE_NEW,
3720 BTRFS_COMPARE_TREE_DELETED,
3721 BTRFS_COMPARE_TREE_CHANGED,
3722 BTRFS_COMPARE_TREE_SAME,
3724 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3725 struct btrfs_root *right_root,
3726 struct btrfs_path *left_path,
3727 struct btrfs_path *right_path,
3728 struct btrfs_key *key,
3729 enum btrfs_compare_tree_result result,
3731 int btrfs_compare_trees(struct btrfs_root *left_root,
3732 struct btrfs_root *right_root,
3733 btrfs_changed_cb_t cb, void *ctx);
3734 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3735 struct btrfs_root *root, struct extent_buffer *buf,
3736 struct extent_buffer *parent, int parent_slot,
3737 struct extent_buffer **cow_ret);
3738 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3739 struct btrfs_root *root,
3740 struct extent_buffer *buf,
3741 struct extent_buffer **cow_ret, u64 new_root_objectid);
3742 int btrfs_block_can_be_shared(struct btrfs_root *root,
3743 struct extent_buffer *buf);
3744 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3746 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3747 u32 new_size, int from_end);
3748 int btrfs_split_item(struct btrfs_trans_handle *trans,
3749 struct btrfs_root *root,
3750 struct btrfs_path *path,
3751 struct btrfs_key *new_key,
3752 unsigned long split_offset);
3753 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3754 struct btrfs_root *root,
3755 struct btrfs_path *path,
3756 struct btrfs_key *new_key);
3757 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3758 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3759 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3760 *root, struct btrfs_key *key, struct btrfs_path *p, int
3762 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3763 struct btrfs_path *p, u64 time_seq);
3764 int btrfs_search_slot_for_read(struct btrfs_root *root,
3765 struct btrfs_key *key, struct btrfs_path *p,
3766 int find_higher, int return_any);
3767 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3768 struct btrfs_root *root, struct extent_buffer *parent,
3769 int start_slot, u64 *last_ret,
3770 struct btrfs_key *progress);
3771 void btrfs_release_path(struct btrfs_path *p);
3772 struct btrfs_path *btrfs_alloc_path(void);
3773 void btrfs_free_path(struct btrfs_path *p);
3774 void btrfs_set_path_blocking(struct btrfs_path *p);
3775 void btrfs_clear_path_blocking(struct btrfs_path *p,
3776 struct extent_buffer *held, int held_rw);
3777 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3779 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3780 struct btrfs_path *path, int slot, int nr);
3781 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3782 struct btrfs_root *root,
3783 struct btrfs_path *path)
3785 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3788 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3789 struct btrfs_key *cpu_key, u32 *data_size,
3790 u32 total_data, u32 total_size, int nr);
3791 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3792 *root, struct btrfs_key *key, void *data, u32 data_size);
3793 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3794 struct btrfs_root *root,
3795 struct btrfs_path *path,
3796 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3798 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3799 struct btrfs_root *root,
3800 struct btrfs_path *path,
3801 struct btrfs_key *key,
3804 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3807 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3808 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3809 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3811 static inline int btrfs_next_old_item(struct btrfs_root *root,
3812 struct btrfs_path *p, u64 time_seq)
3815 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3816 return btrfs_next_old_leaf(root, p, time_seq);
3819 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3821 return btrfs_next_old_item(root, p, 0);
3823 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3824 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3825 struct btrfs_block_rsv *block_rsv,
3826 int update_ref, int for_reloc);
3827 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3828 struct btrfs_root *root,
3829 struct extent_buffer *node,
3830 struct extent_buffer *parent);
3831 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3834 * Get synced with close_ctree()
3837 return fs_info->closing;
3841 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3842 * anything except sleeping. This function is used to check the status of
3845 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3847 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3848 btrfs_fs_closing(root->fs_info));
3851 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3853 kfree(fs_info->balance_ctl);
3854 kfree(fs_info->delayed_root);
3855 kfree(fs_info->extent_root);
3856 kfree(fs_info->tree_root);
3857 kfree(fs_info->chunk_root);
3858 kfree(fs_info->dev_root);
3859 kfree(fs_info->csum_root);
3860 kfree(fs_info->quota_root);
3861 kfree(fs_info->uuid_root);
3862 kfree(fs_info->free_space_root);
3863 kfree(fs_info->super_copy);
3864 kfree(fs_info->super_for_commit);
3865 security_free_mnt_opts(&fs_info->security_opts);
3869 /* tree mod log functions from ctree.c */
3870 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3871 struct seq_list *elem);
3872 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3873 struct seq_list *elem);
3874 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3877 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3878 struct btrfs_path *path,
3879 u64 root_id, u64 ref_id);
3880 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3881 struct btrfs_root *tree_root,
3882 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3883 const char *name, int name_len);
3884 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3885 struct btrfs_root *tree_root,
3886 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3887 const char *name, int name_len);
3888 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3889 struct btrfs_key *key);
3890 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3891 *root, struct btrfs_key *key, struct btrfs_root_item
3893 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3894 struct btrfs_root *root,
3895 struct btrfs_key *key,
3896 struct btrfs_root_item *item);
3897 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3898 struct btrfs_path *path, struct btrfs_root_item *root_item,
3899 struct btrfs_key *root_key);
3900 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3901 void btrfs_set_root_node(struct btrfs_root_item *item,
3902 struct extent_buffer *node);
3903 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3904 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3905 struct btrfs_root *root);
3908 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3909 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3911 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3912 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3914 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3915 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3919 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3920 const char *name, int name_len);
3921 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3922 struct btrfs_root *root, const char *name,
3923 int name_len, struct inode *dir,
3924 struct btrfs_key *location, u8 type, u64 index);
3925 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3926 struct btrfs_root *root,
3927 struct btrfs_path *path, u64 dir,
3928 const char *name, int name_len,
3930 struct btrfs_dir_item *
3931 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3932 struct btrfs_root *root,
3933 struct btrfs_path *path, u64 dir,
3934 u64 objectid, const char *name, int name_len,
3936 struct btrfs_dir_item *
3937 btrfs_search_dir_index_item(struct btrfs_root *root,
3938 struct btrfs_path *path, u64 dirid,
3939 const char *name, int name_len);
3940 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3941 struct btrfs_root *root,
3942 struct btrfs_path *path,
3943 struct btrfs_dir_item *di);
3944 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3945 struct btrfs_root *root,
3946 struct btrfs_path *path, u64 objectid,
3947 const char *name, u16 name_len,
3948 const void *data, u16 data_len);
3949 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3950 struct btrfs_root *root,
3951 struct btrfs_path *path, u64 dir,
3952 const char *name, u16 name_len,
3954 int verify_dir_item(struct btrfs_root *root,
3955 struct extent_buffer *leaf,
3956 struct btrfs_dir_item *dir_item);
3957 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3958 struct btrfs_path *path,
3963 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3964 struct btrfs_root *root, u64 offset);
3965 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3966 struct btrfs_root *root, u64 offset);
3967 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3970 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3971 struct btrfs_root *root,
3972 const char *name, int name_len,
3973 u64 inode_objectid, u64 ref_objectid, u64 index);
3974 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3975 struct btrfs_root *root,
3976 const char *name, int name_len,
3977 u64 inode_objectid, u64 ref_objectid, u64 *index);
3978 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3979 struct btrfs_root *root,
3980 struct btrfs_path *path, u64 objectid);
3981 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3982 *root, struct btrfs_path *path,
3983 struct btrfs_key *location, int mod);
3985 struct btrfs_inode_extref *
3986 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3987 struct btrfs_root *root,
3988 struct btrfs_path *path,
3989 const char *name, int name_len,
3990 u64 inode_objectid, u64 ref_objectid, int ins_len,
3993 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3994 u64 ref_objectid, const char *name,
3996 struct btrfs_inode_extref **extref_ret);
3999 struct btrfs_dio_private;
4000 int btrfs_del_csums(struct btrfs_trans_handle *trans,
4001 struct btrfs_root *root, u64 bytenr, u64 len);
4002 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
4003 struct bio *bio, u32 *dst);
4004 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
4005 struct bio *bio, u64 logical_offset);
4006 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
4007 struct btrfs_root *root,
4008 u64 objectid, u64 pos,
4009 u64 disk_offset, u64 disk_num_bytes,
4010 u64 num_bytes, u64 offset, u64 ram_bytes,
4011 u8 compression, u8 encryption, u16 other_encoding);
4012 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
4013 struct btrfs_root *root,
4014 struct btrfs_path *path, u64 objectid,
4015 u64 bytenr, int mod);
4016 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
4017 struct btrfs_root *root,
4018 struct btrfs_ordered_sum *sums);
4019 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
4020 struct bio *bio, u64 file_start, int contig);
4021 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
4022 struct list_head *list, int search_commit);
4023 void btrfs_extent_item_to_extent_map(struct inode *inode,
4024 const struct btrfs_path *path,
4025 struct btrfs_file_extent_item *fi,
4026 const bool new_inline,
4027 struct extent_map *em);
4030 struct btrfs_delalloc_work {
4031 struct inode *inode;
4033 struct completion completion;
4034 struct list_head list;
4035 struct btrfs_work work;
4038 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
4040 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
4042 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
4043 size_t pg_offset, u64 start, u64 len,
4045 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
4046 u64 *orig_start, u64 *orig_block_len,
4049 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
4050 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
4051 #define ClearPageChecked ClearPageFsMisc
4052 #define SetPageChecked SetPageFsMisc
4053 #define PageChecked PageFsMisc
4056 /* This forces readahead on a given range of bytes in an inode */
4057 static inline void btrfs_force_ra(struct address_space *mapping,
4058 struct file_ra_state *ra, struct file *file,
4059 pgoff_t offset, unsigned long req_size)
4061 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
4064 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
4065 int btrfs_set_inode_index(struct inode *dir, u64 *index);
4066 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
4067 struct btrfs_root *root,
4068 struct inode *dir, struct inode *inode,
4069 const char *name, int name_len);
4070 int btrfs_add_link(struct btrfs_trans_handle *trans,
4071 struct inode *parent_inode, struct inode *inode,
4072 const char *name, int name_len, int add_backref, u64 index);
4073 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
4074 struct btrfs_root *root,
4075 struct inode *dir, u64 objectid,
4076 const char *name, int name_len);
4077 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
4079 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
4080 struct btrfs_root *root,
4081 struct inode *inode, u64 new_size,
4084 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
4085 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
4087 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
4088 struct extent_state **cached_state);
4089 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
4090 struct btrfs_root *new_root,
4091 struct btrfs_root *parent_root,
4093 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
4094 size_t size, struct bio *bio,
4095 unsigned long bio_flags);
4096 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
4097 int btrfs_readpage(struct file *file, struct page *page);
4098 void btrfs_evict_inode(struct inode *inode);
4099 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
4100 struct inode *btrfs_alloc_inode(struct super_block *sb);
4101 void btrfs_destroy_inode(struct inode *inode);
4102 int btrfs_drop_inode(struct inode *inode);
4103 int btrfs_init_cachep(void);
4104 void btrfs_destroy_cachep(void);
4105 long btrfs_ioctl_trans_end(struct file *file);
4106 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
4107 struct btrfs_root *root, int *was_new);
4108 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
4109 size_t pg_offset, u64 start, u64 end,
4111 int btrfs_update_inode(struct btrfs_trans_handle *trans,
4112 struct btrfs_root *root,
4113 struct inode *inode);
4114 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
4115 struct btrfs_root *root, struct inode *inode);
4116 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
4117 int btrfs_orphan_cleanup(struct btrfs_root *root);
4118 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
4119 struct btrfs_root *root);
4120 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
4121 void btrfs_invalidate_inodes(struct btrfs_root *root);
4122 void btrfs_add_delayed_iput(struct inode *inode);
4123 void btrfs_run_delayed_iputs(struct btrfs_root *root);
4124 int btrfs_prealloc_file_range(struct inode *inode, int mode,
4125 u64 start, u64 num_bytes, u64 min_size,
4126 loff_t actual_len, u64 *alloc_hint);
4127 int btrfs_prealloc_file_range_trans(struct inode *inode,
4128 struct btrfs_trans_handle *trans, int mode,
4129 u64 start, u64 num_bytes, u64 min_size,
4130 loff_t actual_len, u64 *alloc_hint);
4131 int btrfs_inode_check_errors(struct inode *inode);
4132 extern const struct dentry_operations btrfs_dentry_operations;
4133 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4134 void btrfs_test_inode_set_ops(struct inode *inode);
4138 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
4139 int btrfs_ioctl_get_supported_features(void __user *arg);
4140 void btrfs_update_iflags(struct inode *inode);
4141 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
4142 int btrfs_is_empty_uuid(u8 *uuid);
4143 int btrfs_defrag_file(struct inode *inode, struct file *file,
4144 struct btrfs_ioctl_defrag_range_args *range,
4145 u64 newer_than, unsigned long max_pages);
4146 void btrfs_get_block_group_info(struct list_head *groups_list,
4147 struct btrfs_ioctl_space_info *space);
4148 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
4149 struct btrfs_ioctl_balance_args *bargs);
4150 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
4151 struct file *dst_file, u64 dst_loff);
4154 int btrfs_auto_defrag_init(void);
4155 void btrfs_auto_defrag_exit(void);
4156 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
4157 struct inode *inode);
4158 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
4159 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
4160 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
4161 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
4163 extern const struct file_operations btrfs_file_operations;
4164 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
4165 struct btrfs_root *root, struct inode *inode,
4166 struct btrfs_path *path, u64 start, u64 end,
4167 u64 *drop_end, int drop_cache,
4169 u32 extent_item_size,
4171 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
4172 struct btrfs_root *root, struct inode *inode, u64 start,
4173 u64 end, int drop_cache);
4174 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
4175 struct inode *inode, u64 start, u64 end);
4176 int btrfs_release_file(struct inode *inode, struct file *file);
4177 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
4178 struct page **pages, size_t num_pages,
4179 loff_t pos, size_t write_bytes,
4180 struct extent_state **cached);
4181 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
4182 ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
4183 struct file *file_out, loff_t pos_out,
4184 size_t len, unsigned int flags);
4185 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
4186 struct file *file_out, loff_t pos_out, u64 len);
4189 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
4190 struct btrfs_root *root);
4193 int btrfs_init_sysfs(void);
4194 void btrfs_exit_sysfs(void);
4195 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
4196 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
4199 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
4202 int btrfs_parse_options(struct btrfs_root *root, char *options,
4203 unsigned long new_flags);
4204 int btrfs_sync_fs(struct super_block *sb, int wait);
4206 #ifdef CONFIG_PRINTK
4208 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4210 static inline __printf(2, 3)
4211 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4216 #define btrfs_emerg(fs_info, fmt, args...) \
4217 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4218 #define btrfs_alert(fs_info, fmt, args...) \
4219 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4220 #define btrfs_crit(fs_info, fmt, args...) \
4221 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4222 #define btrfs_err(fs_info, fmt, args...) \
4223 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4224 #define btrfs_warn(fs_info, fmt, args...) \
4225 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4226 #define btrfs_notice(fs_info, fmt, args...) \
4227 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4228 #define btrfs_info(fs_info, fmt, args...) \
4229 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4232 * Wrappers that use printk_in_rcu
4234 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
4235 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4236 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
4237 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4238 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
4239 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4240 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
4241 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
4242 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
4243 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4244 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
4245 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4246 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
4247 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
4250 * Wrappers that use a ratelimited printk_in_rcu
4252 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
4253 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4254 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
4255 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4256 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
4257 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4258 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
4259 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
4260 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
4261 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4262 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
4263 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4264 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
4265 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
4268 * Wrappers that use a ratelimited printk
4270 #define btrfs_emerg_rl(fs_info, fmt, args...) \
4271 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
4272 #define btrfs_alert_rl(fs_info, fmt, args...) \
4273 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
4274 #define btrfs_crit_rl(fs_info, fmt, args...) \
4275 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
4276 #define btrfs_err_rl(fs_info, fmt, args...) \
4277 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
4278 #define btrfs_warn_rl(fs_info, fmt, args...) \
4279 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
4280 #define btrfs_notice_rl(fs_info, fmt, args...) \
4281 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
4282 #define btrfs_info_rl(fs_info, fmt, args...) \
4283 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
4285 #define btrfs_debug(fs_info, fmt, args...) \
4286 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4287 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4288 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4289 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4290 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4291 #define btrfs_debug_rl(fs_info, fmt, args...) \
4292 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
4294 #define btrfs_debug(fs_info, fmt, args...) \
4295 no_printk(KERN_DEBUG fmt, ##args)
4296 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4297 no_printk(KERN_DEBUG fmt, ##args)
4298 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4299 no_printk(KERN_DEBUG fmt, ##args)
4300 #define btrfs_debug_rl(fs_info, fmt, args...) \
4301 no_printk(KERN_DEBUG fmt, ##args)
4304 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
4307 btrfs_printk(fs_info, fmt, ##args); \
4308 rcu_read_unlock(); \
4311 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
4313 static DEFINE_RATELIMIT_STATE(_rs, \
4314 DEFAULT_RATELIMIT_INTERVAL, \
4315 DEFAULT_RATELIMIT_BURST); \
4316 if (__ratelimit(&_rs)) \
4317 btrfs_printk(fs_info, fmt, ##args); \
4320 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
4323 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
4324 rcu_read_unlock(); \
4327 #ifdef CONFIG_BTRFS_ASSERT
4330 static inline void assfail(char *expr, char *file, int line)
4332 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4337 #define ASSERT(expr) \
4338 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4340 #define ASSERT(expr) ((void)0)
4343 #define btrfs_assert()
4346 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
4347 unsigned int line, int errno, const char *fmt, ...);
4349 const char *btrfs_decode_error(int errno);
4352 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4353 struct btrfs_root *root, const char *function,
4354 unsigned int line, int errno);
4356 #define btrfs_set_fs_incompat(__fs_info, opt) \
4357 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4359 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4362 struct btrfs_super_block *disk_super;
4365 disk_super = fs_info->super_copy;
4366 features = btrfs_super_incompat_flags(disk_super);
4367 if (!(features & flag)) {
4368 spin_lock(&fs_info->super_lock);
4369 features = btrfs_super_incompat_flags(disk_super);
4370 if (!(features & flag)) {
4372 btrfs_set_super_incompat_flags(disk_super, features);
4373 btrfs_info(fs_info, "setting %llu feature flag",
4376 spin_unlock(&fs_info->super_lock);
4380 #define btrfs_clear_fs_incompat(__fs_info, opt) \
4381 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4383 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
4386 struct btrfs_super_block *disk_super;
4389 disk_super = fs_info->super_copy;
4390 features = btrfs_super_incompat_flags(disk_super);
4391 if (features & flag) {
4392 spin_lock(&fs_info->super_lock);
4393 features = btrfs_super_incompat_flags(disk_super);
4394 if (features & flag) {
4396 btrfs_set_super_incompat_flags(disk_super, features);
4397 btrfs_info(fs_info, "clearing %llu feature flag",
4400 spin_unlock(&fs_info->super_lock);
4404 #define btrfs_fs_incompat(fs_info, opt) \
4405 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4407 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4409 struct btrfs_super_block *disk_super;
4410 disk_super = fs_info->super_copy;
4411 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4414 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
4415 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4417 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
4420 struct btrfs_super_block *disk_super;
4423 disk_super = fs_info->super_copy;
4424 features = btrfs_super_compat_ro_flags(disk_super);
4425 if (!(features & flag)) {
4426 spin_lock(&fs_info->super_lock);
4427 features = btrfs_super_compat_ro_flags(disk_super);
4428 if (!(features & flag)) {
4430 btrfs_set_super_compat_ro_flags(disk_super, features);
4431 btrfs_info(fs_info, "setting %llu ro feature flag",
4434 spin_unlock(&fs_info->super_lock);
4438 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
4439 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4441 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
4444 struct btrfs_super_block *disk_super;
4447 disk_super = fs_info->super_copy;
4448 features = btrfs_super_compat_ro_flags(disk_super);
4449 if (features & flag) {
4450 spin_lock(&fs_info->super_lock);
4451 features = btrfs_super_compat_ro_flags(disk_super);
4452 if (features & flag) {
4454 btrfs_set_super_compat_ro_flags(disk_super, features);
4455 btrfs_info(fs_info, "clearing %llu ro feature flag",
4458 spin_unlock(&fs_info->super_lock);
4462 #define btrfs_fs_compat_ro(fs_info, opt) \
4463 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4465 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
4467 struct btrfs_super_block *disk_super;
4468 disk_super = fs_info->super_copy;
4469 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
4473 * Call btrfs_abort_transaction as early as possible when an error condition is
4474 * detected, that way the exact line number is reported.
4476 #define btrfs_abort_transaction(trans, root, errno) \
4478 /* Report first abort since mount */ \
4479 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
4480 &((root)->fs_info->fs_state))) { \
4481 WARN(1, KERN_DEBUG \
4482 "BTRFS: Transaction aborted (error %d)\n", \
4485 __btrfs_abort_transaction((trans), (root), __func__, \
4486 __LINE__, (errno)); \
4489 #define btrfs_std_error(fs_info, errno, fmt, args...) \
4491 __btrfs_std_error((fs_info), __func__, __LINE__, \
4492 (errno), fmt, ##args); \
4497 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4498 unsigned int line, int errno, const char *fmt, ...);
4501 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4502 * will panic(). Otherwise we BUG() here.
4504 #define btrfs_panic(fs_info, errno, fmt, args...) \
4506 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4511 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4512 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4513 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4514 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4515 struct inode *inode, struct inode *dir);
4517 #define btrfs_get_acl NULL
4518 #define btrfs_set_acl NULL
4519 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4520 struct inode *inode, struct inode *dir)
4527 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4528 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4529 struct btrfs_root *root);
4530 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4531 struct btrfs_root *root);
4532 int btrfs_recover_relocation(struct btrfs_root *root);
4533 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4534 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4535 struct btrfs_root *root, struct extent_buffer *buf,
4536 struct extent_buffer *cow);
4537 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
4538 u64 *bytes_to_reserve);
4539 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4540 struct btrfs_pending_snapshot *pending);
4543 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4544 u64 end, struct btrfs_scrub_progress *progress,
4545 int readonly, int is_dev_replace);
4546 void btrfs_scrub_pause(struct btrfs_root *root);
4547 void btrfs_scrub_continue(struct btrfs_root *root);
4548 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4549 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4550 struct btrfs_device *dev);
4551 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4552 struct btrfs_scrub_progress *progress);
4555 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4556 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4557 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4559 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4561 btrfs_bio_counter_sub(fs_info, 1);
4565 struct reada_control {
4566 struct btrfs_root *root; /* tree to prefetch */
4567 struct btrfs_key key_start;
4568 struct btrfs_key key_end; /* exclusive */
4571 wait_queue_head_t wait;
4573 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4574 struct btrfs_key *start, struct btrfs_key *end);
4575 int btrfs_reada_wait(void *handle);
4576 void btrfs_reada_detach(void *handle);
4577 int btree_readahead_hook(struct btrfs_fs_info *fs_info,
4578 struct extent_buffer *eb, u64 start, int err);
4580 static inline int is_fstree(u64 rootid)
4582 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4583 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
4584 !btrfs_qgroup_level(rootid)))
4589 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4591 return signal_pending(current);
4594 /* Sanity test specific functions */
4595 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4596 void btrfs_test_destroy_inode(struct inode *inode);
4599 static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4601 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4602 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))