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
415 * just in case we somehow lose the roots and are not able to mount,
416 * we store an array of the roots from previous transactions
419 #define BTRFS_NUM_BACKUP_ROOTS 4
420 struct btrfs_root_backup {
422 __le64 tree_root_gen;
425 __le64 chunk_root_gen;
428 __le64 extent_root_gen;
437 __le64 csum_root_gen;
447 u8 extent_root_level;
451 /* future and to align */
453 } __attribute__ ((__packed__));
456 * the super block basically lists the main trees of the FS
457 * it currently lacks any block count etc etc
459 struct btrfs_super_block {
460 u8 csum[BTRFS_CSUM_SIZE];
461 /* the first 4 fields must match struct btrfs_header */
462 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
463 __le64 bytenr; /* this block number */
466 /* allowed to be different from the btrfs_header from here own down */
473 /* this will help find the new super based on the log root */
474 __le64 log_root_transid;
477 __le64 root_dir_objectid;
481 __le32 __unused_leafsize;
483 __le32 sys_chunk_array_size;
484 __le64 chunk_root_generation;
486 __le64 compat_ro_flags;
487 __le64 incompat_flags;
492 struct btrfs_dev_item dev_item;
494 char label[BTRFS_LABEL_SIZE];
496 __le64 cache_generation;
497 __le64 uuid_tree_generation;
499 /* future expansion */
501 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
502 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
503 } __attribute__ ((__packed__));
506 * Compat flags that we support. If any incompat flags are set other than the
507 * ones specified below then we will fail to mount
509 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
510 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
511 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
513 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
514 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
516 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
517 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
519 #define BTRFS_FEATURE_INCOMPAT_SUPP \
520 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
521 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
522 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
523 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
524 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
525 BTRFS_FEATURE_INCOMPAT_RAID56 | \
526 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
527 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
528 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
530 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
531 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
532 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
535 * A leaf is full of items. offset and size tell us where to find
536 * the item in the leaf (relative to the start of the data area)
539 struct btrfs_disk_key key;
542 } __attribute__ ((__packed__));
545 * leaves have an item area and a data area:
546 * [item0, item1....itemN] [free space] [dataN...data1, data0]
548 * The data is separate from the items to get the keys closer together
552 struct btrfs_header header;
553 struct btrfs_item items[];
554 } __attribute__ ((__packed__));
557 * all non-leaf blocks are nodes, they hold only keys and pointers to
560 struct btrfs_key_ptr {
561 struct btrfs_disk_key key;
564 } __attribute__ ((__packed__));
567 struct btrfs_header header;
568 struct btrfs_key_ptr ptrs[];
569 } __attribute__ ((__packed__));
572 * btrfs_paths remember the path taken from the root down to the leaf.
573 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
574 * to any other levels that are present.
576 * The slots array records the index of the item or block pointer
577 * used while walking the tree.
579 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
581 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
582 int slots[BTRFS_MAX_LEVEL];
583 /* if there is real range locking, this locks field will change */
584 u8 locks[BTRFS_MAX_LEVEL];
586 /* keep some upper locks as we walk down */
590 * set by btrfs_split_item, tells search_slot to keep all locks
591 * and to force calls to keep space in the nodes
593 unsigned int search_for_split:1;
594 unsigned int keep_locks:1;
595 unsigned int skip_locking:1;
596 unsigned int leave_spinning:1;
597 unsigned int search_commit_root:1;
598 unsigned int need_commit_sem:1;
599 unsigned int skip_release_on_error:1;
603 * items in the extent btree are used to record the objectid of the
604 * owner of the block and the number of references
607 struct btrfs_extent_item {
611 } __attribute__ ((__packed__));
613 struct btrfs_extent_item_v0 {
615 } __attribute__ ((__packed__));
617 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
618 sizeof(struct btrfs_item))
620 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
621 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
623 /* following flags only apply to tree blocks */
625 /* use full backrefs for extent pointers in the block */
626 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
629 * this flag is only used internally by scrub and may be changed at any time
630 * it is only declared here to avoid collisions
632 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
634 struct btrfs_tree_block_info {
635 struct btrfs_disk_key key;
637 } __attribute__ ((__packed__));
639 struct btrfs_extent_data_ref {
644 } __attribute__ ((__packed__));
646 struct btrfs_shared_data_ref {
648 } __attribute__ ((__packed__));
650 struct btrfs_extent_inline_ref {
653 } __attribute__ ((__packed__));
655 /* old style backrefs item */
656 struct btrfs_extent_ref_v0 {
661 } __attribute__ ((__packed__));
664 /* dev extents record free space on individual devices. The owner
665 * field points back to the chunk allocation mapping tree that allocated
666 * the extent. The chunk tree uuid field is a way to double check the owner
668 struct btrfs_dev_extent {
670 __le64 chunk_objectid;
673 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
674 } __attribute__ ((__packed__));
676 struct btrfs_inode_ref {
680 } __attribute__ ((__packed__));
682 struct btrfs_inode_extref {
683 __le64 parent_objectid;
688 } __attribute__ ((__packed__));
690 struct btrfs_timespec {
693 } __attribute__ ((__packed__));
695 struct btrfs_inode_item {
696 /* nfs style generation number */
698 /* transid that last touched this inode */
710 /* modification sequence number for NFS */
714 * a little future expansion, for more than this we can
715 * just grow the inode item and version it
718 struct btrfs_timespec atime;
719 struct btrfs_timespec ctime;
720 struct btrfs_timespec mtime;
721 struct btrfs_timespec otime;
722 } __attribute__ ((__packed__));
724 struct btrfs_dir_log_item {
726 } __attribute__ ((__packed__));
728 struct btrfs_dir_item {
729 struct btrfs_disk_key location;
734 } __attribute__ ((__packed__));
736 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
739 * Internal in-memory flag that a subvolume has been marked for deletion but
740 * still visible as a directory
742 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
744 struct btrfs_root_item {
745 struct btrfs_inode_item inode;
751 __le64 last_snapshot;
754 struct btrfs_disk_key drop_progress;
759 * The following fields appear after subvol_uuids+subvol_times
764 * This generation number is used to test if the new fields are valid
765 * and up to date while reading the root item. Every time the root item
766 * is written out, the "generation" field is copied into this field. If
767 * anyone ever mounted the fs with an older kernel, we will have
768 * mismatching generation values here and thus must invalidate the
769 * new fields. See btrfs_update_root and btrfs_find_last_root for
771 * the offset of generation_v2 is also used as the start for the memset
772 * when invalidating the fields.
774 __le64 generation_v2;
775 u8 uuid[BTRFS_UUID_SIZE];
776 u8 parent_uuid[BTRFS_UUID_SIZE];
777 u8 received_uuid[BTRFS_UUID_SIZE];
778 __le64 ctransid; /* updated when an inode changes */
779 __le64 otransid; /* trans when created */
780 __le64 stransid; /* trans when sent. non-zero for received subvol */
781 __le64 rtransid; /* trans when received. non-zero for received subvol */
782 struct btrfs_timespec ctime;
783 struct btrfs_timespec otime;
784 struct btrfs_timespec stime;
785 struct btrfs_timespec rtime;
786 __le64 reserved[8]; /* for future */
787 } __attribute__ ((__packed__));
790 * this is used for both forward and backward root refs
792 struct btrfs_root_ref {
796 } __attribute__ ((__packed__));
798 struct btrfs_disk_balance_args {
800 * profiles to operate on, single is denoted by
801 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
807 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
808 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
821 /* devid subset filter [pstart..pend) */
825 /* btrfs virtual address space subset filter [vstart..vend) */
830 * profile to convert to, single is denoted by
831 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
835 /* BTRFS_BALANCE_ARGS_* */
839 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
840 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
852 * Process chunks that cross stripes_min..stripes_max devices,
853 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
859 } __attribute__ ((__packed__));
862 * store balance parameters to disk so that balance can be properly
863 * resumed after crash or unmount
865 struct btrfs_balance_item {
866 /* BTRFS_BALANCE_* */
869 struct btrfs_disk_balance_args data;
870 struct btrfs_disk_balance_args meta;
871 struct btrfs_disk_balance_args sys;
874 } __attribute__ ((__packed__));
876 #define BTRFS_FILE_EXTENT_INLINE 0
877 #define BTRFS_FILE_EXTENT_REG 1
878 #define BTRFS_FILE_EXTENT_PREALLOC 2
880 struct btrfs_file_extent_item {
882 * transaction id that created this extent
886 * max number of bytes to hold this extent in ram
887 * when we split a compressed extent we can't know how big
888 * each of the resulting pieces will be. So, this is
889 * an upper limit on the size of the extent in ram instead of
895 * 32 bits for the various ways we might encode the data,
896 * including compression and encryption. If any of these
897 * are set to something a given disk format doesn't understand
898 * it is treated like an incompat flag for reading and writing,
903 __le16 other_encoding; /* spare for later use */
905 /* are we inline data or a real extent? */
909 * disk space consumed by the extent, checksum blocks are included
912 * At this offset in the structure, the inline extent data start.
915 __le64 disk_num_bytes;
917 * the logical offset in file blocks (no csums)
918 * this extent record is for. This allows a file extent to point
919 * into the middle of an existing extent on disk, sharing it
920 * between two snapshots (useful if some bytes in the middle of the
921 * extent have changed
925 * the logical number of file blocks (no csums included). This
926 * always reflects the size uncompressed and without encoding.
930 } __attribute__ ((__packed__));
932 struct btrfs_csum_item {
934 } __attribute__ ((__packed__));
936 struct btrfs_dev_stats_item {
938 * grow this item struct at the end for future enhancements and keep
939 * the existing values unchanged
941 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
942 } __attribute__ ((__packed__));
944 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
945 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
946 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
947 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
948 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
949 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
950 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
952 struct btrfs_dev_replace {
953 u64 replace_state; /* see #define above */
954 u64 time_started; /* seconds since 1-Jan-1970 */
955 u64 time_stopped; /* seconds since 1-Jan-1970 */
956 atomic64_t num_write_errors;
957 atomic64_t num_uncorrectable_read_errors;
960 u64 committed_cursor_left;
961 u64 cursor_left_last_write_of_item;
964 u64 cont_reading_from_srcdev_mode; /* see #define above */
967 int item_needs_writeback;
968 struct btrfs_device *srcdev;
969 struct btrfs_device *tgtdev;
972 atomic_t nesting_level;
973 struct mutex lock_finishing_cancel_unmount;
976 atomic_t blocking_readers;
977 wait_queue_head_t read_lock_wq;
979 struct btrfs_scrub_progress scrub_progress;
982 struct btrfs_dev_replace_item {
984 * grow this item struct at the end for future enhancements and keep
985 * the existing values unchanged
990 __le64 cont_reading_from_srcdev_mode;
992 __le64 replace_state;
995 __le64 num_write_errors;
996 __le64 num_uncorrectable_read_errors;
997 } __attribute__ ((__packed__));
999 /* different types of block groups (and chunks) */
1000 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
1001 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
1002 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
1003 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
1004 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
1005 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
1006 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
1007 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1008 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1009 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1010 BTRFS_SPACE_INFO_GLOBAL_RSV)
1012 enum btrfs_raid_types {
1023 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1024 BTRFS_BLOCK_GROUP_SYSTEM | \
1025 BTRFS_BLOCK_GROUP_METADATA)
1027 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1028 BTRFS_BLOCK_GROUP_RAID1 | \
1029 BTRFS_BLOCK_GROUP_RAID5 | \
1030 BTRFS_BLOCK_GROUP_RAID6 | \
1031 BTRFS_BLOCK_GROUP_DUP | \
1032 BTRFS_BLOCK_GROUP_RAID10)
1033 #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1034 BTRFS_BLOCK_GROUP_RAID6)
1037 * We need a bit for restriper to be able to tell when chunks of type
1038 * SINGLE are available. This "extended" profile format is used in
1039 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1040 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1041 * to avoid remappings between two formats in future.
1043 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1046 * A fake block group type that is used to communicate global block reserve
1047 * size to userspace via the SPACE_INFO ioctl.
1049 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1051 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1052 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1054 static inline u64 chunk_to_extended(u64 flags)
1056 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1057 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1061 static inline u64 extended_to_chunk(u64 flags)
1063 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1066 struct btrfs_block_group_item {
1068 __le64 chunk_objectid;
1070 } __attribute__ ((__packed__));
1072 struct btrfs_free_space_info {
1073 __le32 extent_count;
1075 } __attribute__ ((__packed__));
1077 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1079 #define BTRFS_QGROUP_LEVEL_SHIFT 48
1080 static inline u64 btrfs_qgroup_level(u64 qgroupid)
1082 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1086 * is subvolume quota turned on?
1088 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1090 * RESCAN is set during the initialization phase
1092 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1094 * Some qgroup entries are known to be out of date,
1095 * either because the configuration has changed in a way that
1096 * makes a rescan necessary, or because the fs has been mounted
1097 * with a non-qgroup-aware version.
1098 * Turning qouta off and on again makes it inconsistent, too.
1100 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1102 #define BTRFS_QGROUP_STATUS_VERSION 1
1104 struct btrfs_qgroup_status_item {
1107 * the generation is updated during every commit. As older
1108 * versions of btrfs are not aware of qgroups, it will be
1109 * possible to detect inconsistencies by checking the
1110 * generation on mount time
1114 /* flag definitions see above */
1118 * only used during scanning to record the progress
1119 * of the scan. It contains a logical address
1122 } __attribute__ ((__packed__));
1124 struct btrfs_qgroup_info_item {
1130 } __attribute__ ((__packed__));
1132 struct btrfs_qgroup_limit_item {
1134 * only updated when any of the other values change
1141 } __attribute__ ((__packed__));
1143 /* For raid type sysfs entries */
1144 struct raid_kobject {
1146 struct kobject kobj;
1149 struct btrfs_space_info {
1152 u64 total_bytes; /* total bytes in the space,
1153 this doesn't take mirrors into account */
1154 u64 bytes_used; /* total bytes used,
1155 this doesn't take mirrors into account */
1156 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1157 transaction finishes */
1158 u64 bytes_reserved; /* total bytes the allocator has reserved for
1159 current allocations */
1160 u64 bytes_may_use; /* number of bytes that may be used for
1161 delalloc/allocations */
1162 u64 bytes_readonly; /* total bytes that are read only */
1164 u64 max_extent_size; /* This will hold the maximum extent size of
1165 the space info if we had an ENOSPC in the
1168 unsigned int full:1; /* indicates that we cannot allocate any more
1169 chunks for this space */
1170 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1172 unsigned int flush:1; /* set if we are trying to make space */
1174 unsigned int force_alloc; /* set if we need to force a chunk
1175 alloc for this space */
1177 u64 disk_used; /* total bytes used on disk */
1178 u64 disk_total; /* total bytes on disk, takes mirrors into
1184 * bytes_pinned is kept in line with what is actually pinned, as in
1185 * we've called update_block_group and dropped the bytes_used counter
1186 * and increased the bytes_pinned counter. However this means that
1187 * bytes_pinned does not reflect the bytes that will be pinned once the
1188 * delayed refs are flushed, so this counter is inc'ed every time we
1189 * call btrfs_free_extent so it is a realtime count of what will be
1190 * freed once the transaction is committed. It will be zero'ed every
1191 * time the transaction commits.
1193 struct percpu_counter total_bytes_pinned;
1195 struct list_head list;
1196 /* Protected by the spinlock 'lock'. */
1197 struct list_head ro_bgs;
1199 struct rw_semaphore groups_sem;
1200 /* for block groups in our same type */
1201 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1202 wait_queue_head_t wait;
1204 struct kobject kobj;
1205 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1208 #define BTRFS_BLOCK_RSV_GLOBAL 1
1209 #define BTRFS_BLOCK_RSV_DELALLOC 2
1210 #define BTRFS_BLOCK_RSV_TRANS 3
1211 #define BTRFS_BLOCK_RSV_CHUNK 4
1212 #define BTRFS_BLOCK_RSV_DELOPS 5
1213 #define BTRFS_BLOCK_RSV_EMPTY 6
1214 #define BTRFS_BLOCK_RSV_TEMP 7
1216 struct btrfs_block_rsv {
1219 struct btrfs_space_info *space_info;
1221 unsigned short full;
1222 unsigned short type;
1223 unsigned short failfast;
1227 * free clusters are used to claim free space in relatively large chunks,
1228 * allowing us to do less seeky writes. They are used for all metadata
1229 * allocations and data allocations in ssd mode.
1231 struct btrfs_free_cluster {
1233 spinlock_t refill_lock;
1234 struct rb_root root;
1236 /* largest extent in this cluster */
1239 /* first extent starting offset */
1242 /* We did a full search and couldn't create a cluster */
1245 struct btrfs_block_group_cache *block_group;
1247 * when a cluster is allocated from a block group, we put the
1248 * cluster onto a list in the block group so that it can
1249 * be freed before the block group is freed.
1251 struct list_head block_group_list;
1254 enum btrfs_caching_type {
1256 BTRFS_CACHE_STARTED = 1,
1257 BTRFS_CACHE_FAST = 2,
1258 BTRFS_CACHE_FINISHED = 3,
1259 BTRFS_CACHE_ERROR = 4,
1262 enum btrfs_disk_cache_state {
1263 BTRFS_DC_WRITTEN = 0,
1269 struct btrfs_caching_control {
1270 struct list_head list;
1272 wait_queue_head_t wait;
1273 struct btrfs_work work;
1274 struct btrfs_block_group_cache *block_group;
1279 /* Once caching_thread() finds this much free space, it will wake up waiters. */
1280 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
1282 struct btrfs_io_ctl {
1285 struct page **pages;
1286 struct btrfs_root *root;
1287 struct inode *inode;
1293 unsigned check_crcs:1;
1296 struct btrfs_block_group_cache {
1297 struct btrfs_key key;
1298 struct btrfs_block_group_item item;
1299 struct btrfs_fs_info *fs_info;
1300 struct inode *inode;
1307 u64 cache_generation;
1311 * If the free space extent count exceeds this number, convert the block
1314 u32 bitmap_high_thresh;
1317 * If the free space extent count drops below this number, convert the
1318 * block group back to extents.
1320 u32 bitmap_low_thresh;
1323 * It is just used for the delayed data space allocation because
1324 * only the data space allocation and the relative metadata update
1325 * can be done cross the transaction.
1327 struct rw_semaphore data_rwsem;
1329 /* for raid56, this is a full stripe, without parity */
1330 unsigned long full_stripe_len;
1333 unsigned int iref:1;
1334 unsigned int has_caching_ctl:1;
1335 unsigned int removed:1;
1337 int disk_cache_state;
1339 /* cache tracking stuff */
1341 struct btrfs_caching_control *caching_ctl;
1342 u64 last_byte_to_unpin;
1344 struct btrfs_space_info *space_info;
1346 /* free space cache stuff */
1347 struct btrfs_free_space_ctl *free_space_ctl;
1349 /* block group cache stuff */
1350 struct rb_node cache_node;
1352 /* for block groups in the same raid type */
1353 struct list_head list;
1358 /* List of struct btrfs_free_clusters for this block group.
1359 * Today it will only have one thing on it, but that may change
1361 struct list_head cluster_list;
1363 /* For delayed block group creation or deletion of empty block groups */
1364 struct list_head bg_list;
1366 /* For read-only block groups */
1367 struct list_head ro_list;
1371 /* For dirty block groups */
1372 struct list_head dirty_list;
1373 struct list_head io_list;
1375 struct btrfs_io_ctl io_ctl;
1377 /* Lock for free space tree operations. */
1378 struct mutex free_space_lock;
1381 * Does the block group need to be added to the free space tree?
1382 * Protected by free_space_lock.
1384 int needs_free_space;
1387 /* delayed seq elem */
1389 struct list_head list;
1393 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1395 enum btrfs_orphan_cleanup_state {
1396 ORPHAN_CLEANUP_STARTED = 1,
1397 ORPHAN_CLEANUP_DONE = 2,
1400 /* used by the raid56 code to lock stripes for read/modify/write */
1401 struct btrfs_stripe_hash {
1402 struct list_head hash_list;
1403 wait_queue_head_t wait;
1407 /* used by the raid56 code to lock stripes for read/modify/write */
1408 struct btrfs_stripe_hash_table {
1409 struct list_head stripe_cache;
1410 spinlock_t cache_lock;
1412 struct btrfs_stripe_hash table[];
1415 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1417 void btrfs_init_async_reclaim_work(struct work_struct *work);
1420 struct reloc_control;
1421 struct btrfs_device;
1422 struct btrfs_fs_devices;
1423 struct btrfs_balance_control;
1424 struct btrfs_delayed_root;
1425 struct btrfs_fs_info {
1426 u8 fsid[BTRFS_FSID_SIZE];
1427 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1428 struct btrfs_root *extent_root;
1429 struct btrfs_root *tree_root;
1430 struct btrfs_root *chunk_root;
1431 struct btrfs_root *dev_root;
1432 struct btrfs_root *fs_root;
1433 struct btrfs_root *csum_root;
1434 struct btrfs_root *quota_root;
1435 struct btrfs_root *uuid_root;
1436 struct btrfs_root *free_space_root;
1438 /* the log root tree is a directory of all the other log roots */
1439 struct btrfs_root *log_root_tree;
1441 spinlock_t fs_roots_radix_lock;
1442 struct radix_tree_root fs_roots_radix;
1444 /* block group cache stuff */
1445 spinlock_t block_group_cache_lock;
1446 u64 first_logical_byte;
1447 struct rb_root block_group_cache_tree;
1449 /* keep track of unallocated space */
1450 spinlock_t free_chunk_lock;
1451 u64 free_chunk_space;
1453 struct extent_io_tree freed_extents[2];
1454 struct extent_io_tree *pinned_extents;
1456 /* logical->physical extent mapping */
1457 struct btrfs_mapping_tree mapping_tree;
1460 * block reservation for extent, checksum, root tree and
1461 * delayed dir index item
1463 struct btrfs_block_rsv global_block_rsv;
1464 /* block reservation for delay allocation */
1465 struct btrfs_block_rsv delalloc_block_rsv;
1466 /* block reservation for metadata operations */
1467 struct btrfs_block_rsv trans_block_rsv;
1468 /* block reservation for chunk tree */
1469 struct btrfs_block_rsv chunk_block_rsv;
1470 /* block reservation for delayed operations */
1471 struct btrfs_block_rsv delayed_block_rsv;
1473 struct btrfs_block_rsv empty_block_rsv;
1476 u64 last_trans_committed;
1477 u64 avg_delayed_ref_runtime;
1480 * this is updated to the current trans every time a full commit
1481 * is required instead of the faster short fsync log commits
1483 u64 last_trans_log_full_commit;
1484 unsigned long mount_opt;
1486 * Track requests for actions that need to be done during transaction
1487 * commit (like for some mount options).
1489 unsigned long pending_changes;
1490 unsigned long compress_type:4;
1491 int commit_interval;
1493 * It is a suggestive number, the read side is safe even it gets a
1494 * wrong number because we will write out the data into a regular
1495 * extent. The write side(mount/remount) is under ->s_umount lock,
1496 * so it is also safe.
1500 * Protected by ->chunk_mutex and sb->s_umount.
1502 * The reason that we use two lock to protect it is because only
1503 * remount and mount operations can change it and these two operations
1504 * are under sb->s_umount, but the read side (chunk allocation) can not
1505 * acquire sb->s_umount or the deadlock would happen. So we use two
1506 * locks to protect it. On the write side, we must acquire two locks,
1507 * and on the read side, we just need acquire one of them.
1510 struct btrfs_transaction *running_transaction;
1511 wait_queue_head_t transaction_throttle;
1512 wait_queue_head_t transaction_wait;
1513 wait_queue_head_t transaction_blocked_wait;
1514 wait_queue_head_t async_submit_wait;
1517 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1518 * when they are updated.
1520 * Because we do not clear the flags for ever, so we needn't use
1521 * the lock on the read side.
1523 * We also needn't use the lock when we mount the fs, because
1524 * there is no other task which will update the flag.
1526 spinlock_t super_lock;
1527 struct btrfs_super_block *super_copy;
1528 struct btrfs_super_block *super_for_commit;
1529 struct block_device *__bdev;
1530 struct super_block *sb;
1531 struct inode *btree_inode;
1532 struct backing_dev_info bdi;
1533 struct mutex tree_log_mutex;
1534 struct mutex transaction_kthread_mutex;
1535 struct mutex cleaner_mutex;
1536 struct mutex chunk_mutex;
1537 struct mutex volume_mutex;
1540 * this is taken to make sure we don't set block groups ro after
1541 * the free space cache has been allocated on them
1543 struct mutex ro_block_group_mutex;
1545 /* this is used during read/modify/write to make sure
1546 * no two ios are trying to mod the same stripe at the same
1549 struct btrfs_stripe_hash_table *stripe_hash_table;
1552 * this protects the ordered operations list only while we are
1553 * processing all of the entries on it. This way we make
1554 * sure the commit code doesn't find the list temporarily empty
1555 * because another function happens to be doing non-waiting preflush
1556 * before jumping into the main commit.
1558 struct mutex ordered_operations_mutex;
1560 struct rw_semaphore commit_root_sem;
1562 struct rw_semaphore cleanup_work_sem;
1564 struct rw_semaphore subvol_sem;
1565 struct srcu_struct subvol_srcu;
1567 spinlock_t trans_lock;
1569 * the reloc mutex goes with the trans lock, it is taken
1570 * during commit to protect us from the relocation code
1572 struct mutex reloc_mutex;
1574 struct list_head trans_list;
1575 struct list_head dead_roots;
1576 struct list_head caching_block_groups;
1578 spinlock_t delayed_iput_lock;
1579 struct list_head delayed_iputs;
1580 struct mutex cleaner_delayed_iput_mutex;
1582 /* this protects tree_mod_seq_list */
1583 spinlock_t tree_mod_seq_lock;
1584 atomic64_t tree_mod_seq;
1585 struct list_head tree_mod_seq_list;
1587 /* this protects tree_mod_log */
1588 rwlock_t tree_mod_log_lock;
1589 struct rb_root tree_mod_log;
1591 atomic_t nr_async_submits;
1592 atomic_t async_submit_draining;
1593 atomic_t nr_async_bios;
1594 atomic_t async_delalloc_pages;
1595 atomic_t open_ioctl_trans;
1598 * this is used to protect the following list -- ordered_roots.
1600 spinlock_t ordered_root_lock;
1603 * all fs/file tree roots in which there are data=ordered extents
1604 * pending writeback are added into this list.
1606 * these can span multiple transactions and basically include
1607 * every dirty data page that isn't from nodatacow
1609 struct list_head ordered_roots;
1611 struct mutex delalloc_root_mutex;
1612 spinlock_t delalloc_root_lock;
1613 /* all fs/file tree roots that have delalloc inodes. */
1614 struct list_head delalloc_roots;
1617 * there is a pool of worker threads for checksumming during writes
1618 * and a pool for checksumming after reads. This is because readers
1619 * can run with FS locks held, and the writers may be waiting for
1620 * those locks. We don't want ordering in the pending list to cause
1621 * deadlocks, and so the two are serviced separately.
1623 * A third pool does submit_bio to avoid deadlocking with the other
1626 struct btrfs_workqueue *workers;
1627 struct btrfs_workqueue *delalloc_workers;
1628 struct btrfs_workqueue *flush_workers;
1629 struct btrfs_workqueue *endio_workers;
1630 struct btrfs_workqueue *endio_meta_workers;
1631 struct btrfs_workqueue *endio_raid56_workers;
1632 struct btrfs_workqueue *endio_repair_workers;
1633 struct btrfs_workqueue *rmw_workers;
1634 struct btrfs_workqueue *endio_meta_write_workers;
1635 struct btrfs_workqueue *endio_write_workers;
1636 struct btrfs_workqueue *endio_freespace_worker;
1637 struct btrfs_workqueue *submit_workers;
1638 struct btrfs_workqueue *caching_workers;
1639 struct btrfs_workqueue *readahead_workers;
1642 * fixup workers take dirty pages that didn't properly go through
1643 * the cow mechanism and make them safe to write. It happens
1644 * for the sys_munmap function call path
1646 struct btrfs_workqueue *fixup_workers;
1647 struct btrfs_workqueue *delayed_workers;
1649 /* the extent workers do delayed refs on the extent allocation tree */
1650 struct btrfs_workqueue *extent_workers;
1651 struct task_struct *transaction_kthread;
1652 struct task_struct *cleaner_kthread;
1653 int thread_pool_size;
1655 struct kobject *space_info_kobj;
1658 int log_root_recovering;
1663 /* used to keep from writing metadata until there is a nice batch */
1664 struct percpu_counter dirty_metadata_bytes;
1665 struct percpu_counter delalloc_bytes;
1666 s32 dirty_metadata_batch;
1669 struct list_head dirty_cowonly_roots;
1671 struct btrfs_fs_devices *fs_devices;
1674 * the space_info list is almost entirely read only. It only changes
1675 * when we add a new raid type to the FS, and that happens
1676 * very rarely. RCU is used to protect it.
1678 struct list_head space_info;
1680 struct btrfs_space_info *data_sinfo;
1682 struct reloc_control *reloc_ctl;
1684 /* data_alloc_cluster is only used in ssd mode */
1685 struct btrfs_free_cluster data_alloc_cluster;
1687 /* all metadata allocations go through this cluster */
1688 struct btrfs_free_cluster meta_alloc_cluster;
1690 /* auto defrag inodes go here */
1691 spinlock_t defrag_inodes_lock;
1692 struct rb_root defrag_inodes;
1693 atomic_t defrag_running;
1695 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1696 seqlock_t profiles_lock;
1698 * these three are in extended format (availability of single
1699 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1700 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1702 u64 avail_data_alloc_bits;
1703 u64 avail_metadata_alloc_bits;
1704 u64 avail_system_alloc_bits;
1706 /* restriper state */
1707 spinlock_t balance_lock;
1708 struct mutex balance_mutex;
1709 atomic_t balance_running;
1710 atomic_t balance_pause_req;
1711 atomic_t balance_cancel_req;
1712 struct btrfs_balance_control *balance_ctl;
1713 wait_queue_head_t balance_wait_q;
1715 unsigned data_chunk_allocations;
1716 unsigned metadata_ratio;
1720 /* private scrub information */
1721 struct mutex scrub_lock;
1722 atomic_t scrubs_running;
1723 atomic_t scrub_pause_req;
1724 atomic_t scrubs_paused;
1725 atomic_t scrub_cancel_req;
1726 wait_queue_head_t scrub_pause_wait;
1727 int scrub_workers_refcnt;
1728 struct btrfs_workqueue *scrub_workers;
1729 struct btrfs_workqueue *scrub_wr_completion_workers;
1730 struct btrfs_workqueue *scrub_nocow_workers;
1731 struct btrfs_workqueue *scrub_parity_workers;
1733 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1734 u32 check_integrity_print_mask;
1739 unsigned int quota_enabled:1;
1742 * quota_enabled only changes state after a commit. This holds the
1745 unsigned int pending_quota_state:1;
1747 /* is qgroup tracking in a consistent state? */
1750 /* holds configuration and tracking. Protected by qgroup_lock */
1751 struct rb_root qgroup_tree;
1752 struct rb_root qgroup_op_tree;
1753 spinlock_t qgroup_lock;
1754 spinlock_t qgroup_op_lock;
1755 atomic_t qgroup_op_seq;
1758 * used to avoid frequently calling ulist_alloc()/ulist_free()
1759 * when doing qgroup accounting, it must be protected by qgroup_lock.
1761 struct ulist *qgroup_ulist;
1763 /* protect user change for quota operations */
1764 struct mutex qgroup_ioctl_lock;
1766 /* list of dirty qgroups to be written at next commit */
1767 struct list_head dirty_qgroups;
1769 /* used by qgroup for an efficient tree traversal */
1772 /* qgroup rescan items */
1773 struct mutex qgroup_rescan_lock; /* protects the progress item */
1774 struct btrfs_key qgroup_rescan_progress;
1775 struct btrfs_workqueue *qgroup_rescan_workers;
1776 struct completion qgroup_rescan_completion;
1777 struct btrfs_work qgroup_rescan_work;
1779 /* filesystem state */
1780 unsigned long fs_state;
1782 struct btrfs_delayed_root *delayed_root;
1784 /* readahead tree */
1785 spinlock_t reada_lock;
1786 struct radix_tree_root reada_tree;
1788 /* readahead works cnt */
1789 atomic_t reada_works_cnt;
1791 /* Extent buffer radix tree */
1792 spinlock_t buffer_lock;
1793 struct radix_tree_root buffer_radix;
1795 /* next backup root to be overwritten */
1796 int backup_root_index;
1798 int num_tolerated_disk_barrier_failures;
1800 /* device replace state */
1801 struct btrfs_dev_replace dev_replace;
1803 atomic_t mutually_exclusive_operation_running;
1805 struct percpu_counter bio_counter;
1806 wait_queue_head_t replace_wait;
1808 struct semaphore uuid_tree_rescan_sem;
1809 unsigned int update_uuid_tree_gen:1;
1811 /* Used to reclaim the metadata space in the background. */
1812 struct work_struct async_reclaim_work;
1814 spinlock_t unused_bgs_lock;
1815 struct list_head unused_bgs;
1816 struct mutex unused_bg_unpin_mutex;
1817 struct mutex delete_unused_bgs_mutex;
1819 /* For btrfs to record security options */
1820 struct security_mnt_opts security_opts;
1823 * Chunks that can't be freed yet (under a trim/discard operation)
1824 * and will be latter freed. Protected by fs_info->chunk_mutex.
1826 struct list_head pinned_chunks;
1828 int creating_free_space_tree;
1831 struct btrfs_subvolume_writers {
1832 struct percpu_counter counter;
1833 wait_queue_head_t wait;
1837 * The state of btrfs root
1840 * btrfs_record_root_in_trans is a multi-step process,
1841 * and it can race with the balancing code. But the
1842 * race is very small, and only the first time the root
1843 * is added to each transaction. So IN_TRANS_SETUP
1844 * is used to tell us when more checks are required
1846 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1847 #define BTRFS_ROOT_REF_COWS 1
1848 #define BTRFS_ROOT_TRACK_DIRTY 2
1849 #define BTRFS_ROOT_IN_RADIX 3
1850 #define BTRFS_ROOT_DUMMY_ROOT 4
1851 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1852 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1853 #define BTRFS_ROOT_FORCE_COW 7
1854 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1855 #define BTRFS_ROOT_DIRTY 9
1858 * in ram representation of the tree. extent_root is used for all allocations
1859 * and for the extent tree extent_root root.
1862 struct extent_buffer *node;
1864 struct extent_buffer *commit_root;
1865 struct btrfs_root *log_root;
1866 struct btrfs_root *reloc_root;
1868 unsigned long state;
1869 struct btrfs_root_item root_item;
1870 struct btrfs_key root_key;
1871 struct btrfs_fs_info *fs_info;
1872 struct extent_io_tree dirty_log_pages;
1874 struct mutex objectid_mutex;
1876 spinlock_t accounting_lock;
1877 struct btrfs_block_rsv *block_rsv;
1879 /* free ino cache stuff */
1880 struct btrfs_free_space_ctl *free_ino_ctl;
1881 enum btrfs_caching_type ino_cache_state;
1882 spinlock_t ino_cache_lock;
1883 wait_queue_head_t ino_cache_wait;
1884 struct btrfs_free_space_ctl *free_ino_pinned;
1885 u64 ino_cache_progress;
1886 struct inode *ino_cache_inode;
1888 struct mutex log_mutex;
1889 wait_queue_head_t log_writer_wait;
1890 wait_queue_head_t log_commit_wait[2];
1891 struct list_head log_ctxs[2];
1892 atomic_t log_writers;
1893 atomic_t log_commit[2];
1896 /* No matter the commit succeeds or not*/
1897 int log_transid_committed;
1898 /* Just be updated when the commit succeeds. */
1899 int last_log_commit;
1900 pid_t log_start_pid;
1905 /* data allocations are done in sectorsize units */
1908 /* node allocations are done in nodesize units */
1915 u64 highest_objectid;
1917 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1920 u64 defrag_trans_start;
1921 struct btrfs_key defrag_progress;
1922 struct btrfs_key defrag_max;
1925 /* the dirty list is only used by non-reference counted roots */
1926 struct list_head dirty_list;
1928 struct list_head root_list;
1930 spinlock_t log_extents_lock[2];
1931 struct list_head logged_list[2];
1933 spinlock_t orphan_lock;
1934 atomic_t orphan_inodes;
1935 struct btrfs_block_rsv *orphan_block_rsv;
1936 int orphan_cleanup_state;
1938 spinlock_t inode_lock;
1939 /* red-black tree that keeps track of in-memory inodes */
1940 struct rb_root inode_tree;
1943 * radix tree that keeps track of delayed nodes of every inode,
1944 * protected by inode_lock
1946 struct radix_tree_root delayed_nodes_tree;
1948 * right now this just gets used so that a root has its own devid
1949 * for stat. It may be used for more later
1953 spinlock_t root_item_lock;
1956 struct mutex delalloc_mutex;
1957 spinlock_t delalloc_lock;
1959 * all of the inodes that have delalloc bytes. It is possible for
1960 * this list to be empty even when there is still dirty data=ordered
1961 * extents waiting to finish IO.
1963 struct list_head delalloc_inodes;
1964 struct list_head delalloc_root;
1965 u64 nr_delalloc_inodes;
1967 struct mutex ordered_extent_mutex;
1969 * this is used by the balancing code to wait for all the pending
1972 spinlock_t ordered_extent_lock;
1975 * all of the data=ordered extents pending writeback
1976 * these can span multiple transactions and basically include
1977 * every dirty data page that isn't from nodatacow
1979 struct list_head ordered_extents;
1980 struct list_head ordered_root;
1981 u64 nr_ordered_extents;
1984 * Number of currently running SEND ioctls to prevent
1985 * manipulation with the read-only status via SUBVOL_SETFLAGS
1987 int send_in_progress;
1988 struct btrfs_subvolume_writers *subv_writers;
1989 atomic_t will_be_snapshoted;
1991 /* For qgroup metadata space reserve */
1992 atomic_t qgroup_meta_rsv;
1995 struct btrfs_ioctl_defrag_range_args {
1996 /* start of the defrag operation */
1999 /* number of bytes to defrag, use (u64)-1 to say all */
2003 * flags for the operation, which can include turning
2004 * on compression for this one defrag
2009 * any extent bigger than this will be considered
2010 * already defragged. Use 0 to take the kernel default
2011 * Use 1 to say every single extent must be rewritten
2013 __u32 extent_thresh;
2016 * which compression method to use if turning on compression
2017 * for this defrag operation. If unspecified, zlib will
2020 __u32 compress_type;
2022 /* spare for later */
2028 * inode items have the data typically returned from stat and store other
2029 * info about object characteristics. There is one for every file and dir in
2032 #define BTRFS_INODE_ITEM_KEY 1
2033 #define BTRFS_INODE_REF_KEY 12
2034 #define BTRFS_INODE_EXTREF_KEY 13
2035 #define BTRFS_XATTR_ITEM_KEY 24
2036 #define BTRFS_ORPHAN_ITEM_KEY 48
2037 /* reserve 2-15 close to the inode for later flexibility */
2040 * dir items are the name -> inode pointers in a directory. There is one
2041 * for every name in a directory.
2043 #define BTRFS_DIR_LOG_ITEM_KEY 60
2044 #define BTRFS_DIR_LOG_INDEX_KEY 72
2045 #define BTRFS_DIR_ITEM_KEY 84
2046 #define BTRFS_DIR_INDEX_KEY 96
2048 * extent data is for file data
2050 #define BTRFS_EXTENT_DATA_KEY 108
2053 * extent csums are stored in a separate tree and hold csums for
2054 * an entire extent on disk.
2056 #define BTRFS_EXTENT_CSUM_KEY 128
2059 * root items point to tree roots. They are typically in the root
2060 * tree used by the super block to find all the other trees
2062 #define BTRFS_ROOT_ITEM_KEY 132
2065 * root backrefs tie subvols and snapshots to the directory entries that
2068 #define BTRFS_ROOT_BACKREF_KEY 144
2071 * root refs make a fast index for listing all of the snapshots and
2072 * subvolumes referenced by a given root. They point directly to the
2073 * directory item in the root that references the subvol
2075 #define BTRFS_ROOT_REF_KEY 156
2078 * extent items are in the extent map tree. These record which blocks
2079 * are used, and how many references there are to each block
2081 #define BTRFS_EXTENT_ITEM_KEY 168
2084 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2085 * the length, so we save the level in key->offset instead of the length.
2087 #define BTRFS_METADATA_ITEM_KEY 169
2089 #define BTRFS_TREE_BLOCK_REF_KEY 176
2091 #define BTRFS_EXTENT_DATA_REF_KEY 178
2093 #define BTRFS_EXTENT_REF_V0_KEY 180
2095 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2097 #define BTRFS_SHARED_DATA_REF_KEY 184
2100 * block groups give us hints into the extent allocation trees. Which
2101 * blocks are free etc etc
2103 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2106 * Every block group is represented in the free space tree by a free space info
2107 * item, which stores some accounting information. It is keyed on
2108 * (block_group_start, FREE_SPACE_INFO, block_group_length).
2110 #define BTRFS_FREE_SPACE_INFO_KEY 198
2113 * A free space extent tracks an extent of space that is free in a block group.
2114 * It is keyed on (start, FREE_SPACE_EXTENT, length).
2116 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
2119 * When a block group becomes very fragmented, we convert it to use bitmaps
2120 * instead of extents. A free space bitmap is keyed on
2121 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
2122 * (length / sectorsize) bits.
2124 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
2126 #define BTRFS_DEV_EXTENT_KEY 204
2127 #define BTRFS_DEV_ITEM_KEY 216
2128 #define BTRFS_CHUNK_ITEM_KEY 228
2131 * Records the overall state of the qgroups.
2132 * There's only one instance of this key present,
2133 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2135 #define BTRFS_QGROUP_STATUS_KEY 240
2137 * Records the currently used space of the qgroup.
2138 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2140 #define BTRFS_QGROUP_INFO_KEY 242
2142 * Contains the user configured limits for the qgroup.
2143 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2145 #define BTRFS_QGROUP_LIMIT_KEY 244
2147 * Records the child-parent relationship of qgroups. For
2148 * each relation, 2 keys are present:
2149 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2150 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2152 #define BTRFS_QGROUP_RELATION_KEY 246
2155 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
2157 #define BTRFS_BALANCE_ITEM_KEY 248
2160 * The key type for tree items that are stored persistently, but do not need to
2161 * exist for extended period of time. The items can exist in any tree.
2163 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
2167 * - balance status item
2168 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
2170 #define BTRFS_TEMPORARY_ITEM_KEY 248
2173 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
2175 #define BTRFS_DEV_STATS_KEY 249
2178 * The key type for tree items that are stored persistently and usually exist
2179 * for a long period, eg. filesystem lifetime. The item kinds can be status
2180 * information, stats or preference values. The item can exist in any tree.
2182 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
2186 * - device statistics, store IO stats in the device tree, one key for all
2188 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
2190 #define BTRFS_PERSISTENT_ITEM_KEY 249
2193 * Persistantly stores the device replace state in the device tree.
2194 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2196 #define BTRFS_DEV_REPLACE_KEY 250
2199 * Stores items that allow to quickly map UUIDs to something else.
2200 * These items are part of the filesystem UUID tree.
2201 * The key is built like this:
2202 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2204 #if BTRFS_UUID_SIZE != 16
2205 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2207 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2208 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2209 * received subvols */
2212 * string items are for debugging. They just store a short string of
2215 #define BTRFS_STRING_ITEM_KEY 253
2218 * Flags for mount options.
2220 * Note: don't forget to add new options to btrfs_show_options()
2222 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2223 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2224 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2225 #define BTRFS_MOUNT_SSD (1 << 3)
2226 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2227 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2228 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2229 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2230 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2231 #define BTRFS_MOUNT_NOSSD (1 << 9)
2232 #define BTRFS_MOUNT_DISCARD (1 << 10)
2233 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2234 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2235 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2236 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2237 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2238 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2239 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2240 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
2241 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2242 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2243 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2244 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2245 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2246 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
2247 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
2248 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
2249 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
2251 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2252 #define BTRFS_DEFAULT_MAX_INLINE (2048)
2254 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2255 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2256 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2257 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2260 #define btrfs_set_and_info(root, opt, fmt, args...) \
2262 if (!btrfs_test_opt(root, opt)) \
2263 btrfs_info(root->fs_info, fmt, ##args); \
2264 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2267 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2269 if (btrfs_test_opt(root, opt)) \
2270 btrfs_info(root->fs_info, fmt, ##args); \
2271 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2274 #ifdef CONFIG_BTRFS_DEBUG
2276 btrfs_should_fragment_free_space(struct btrfs_root *root,
2277 struct btrfs_block_group_cache *block_group)
2279 return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
2280 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
2281 (btrfs_test_opt(root, FRAGMENT_DATA) &&
2282 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
2287 * Requests for changes that need to be done during transaction commit.
2289 * Internal mount options that are used for special handling of the real
2290 * mount options (eg. cannot be set during remount and have to be set during
2291 * transaction commit)
2294 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2295 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2296 #define BTRFS_PENDING_COMMIT (2)
2298 #define btrfs_test_pending(info, opt) \
2299 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2300 #define btrfs_set_pending(info, opt) \
2301 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2302 #define btrfs_clear_pending(info, opt) \
2303 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2306 * Helpers for setting pending mount option changes.
2308 * Expects corresponding macros
2309 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2311 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2313 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2314 btrfs_info((info), fmt, ##args); \
2315 btrfs_set_pending((info), SET_##opt); \
2316 btrfs_clear_pending((info), CLEAR_##opt); \
2320 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2322 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2323 btrfs_info((info), fmt, ##args); \
2324 btrfs_set_pending((info), CLEAR_##opt); \
2325 btrfs_clear_pending((info), SET_##opt); \
2332 #define BTRFS_INODE_NODATASUM (1 << 0)
2333 #define BTRFS_INODE_NODATACOW (1 << 1)
2334 #define BTRFS_INODE_READONLY (1 << 2)
2335 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2336 #define BTRFS_INODE_PREALLOC (1 << 4)
2337 #define BTRFS_INODE_SYNC (1 << 5)
2338 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2339 #define BTRFS_INODE_APPEND (1 << 7)
2340 #define BTRFS_INODE_NODUMP (1 << 8)
2341 #define BTRFS_INODE_NOATIME (1 << 9)
2342 #define BTRFS_INODE_DIRSYNC (1 << 10)
2343 #define BTRFS_INODE_COMPRESS (1 << 11)
2345 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2347 struct btrfs_map_token {
2348 struct extent_buffer *eb;
2350 unsigned long offset;
2353 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
2354 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
2356 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2358 token->kaddr = NULL;
2361 /* some macros to generate set/get funcs for the struct fields. This
2362 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2365 #define le8_to_cpu(v) (v)
2366 #define cpu_to_le8(v) (v)
2369 #define read_eb_member(eb, ptr, type, member, result) ( \
2370 read_extent_buffer(eb, (char *)(result), \
2371 ((unsigned long)(ptr)) + \
2372 offsetof(type, member), \
2373 sizeof(((type *)0)->member)))
2375 #define write_eb_member(eb, ptr, type, member, result) ( \
2376 write_extent_buffer(eb, (char *)(result), \
2377 ((unsigned long)(ptr)) + \
2378 offsetof(type, member), \
2379 sizeof(((type *)0)->member)))
2381 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2382 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2383 unsigned long off, \
2384 struct btrfs_map_token *token); \
2385 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2386 unsigned long off, u##bits val, \
2387 struct btrfs_map_token *token); \
2388 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2389 unsigned long off) \
2391 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2393 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2394 unsigned long off, u##bits val) \
2396 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2399 DECLARE_BTRFS_SETGET_BITS(8)
2400 DECLARE_BTRFS_SETGET_BITS(16)
2401 DECLARE_BTRFS_SETGET_BITS(32)
2402 DECLARE_BTRFS_SETGET_BITS(64)
2404 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2405 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2407 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2408 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2410 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2413 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2414 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2416 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2417 struct btrfs_map_token *token) \
2419 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2420 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2422 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2423 type *s, u##bits val, \
2424 struct btrfs_map_token *token) \
2426 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2427 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2430 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2431 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2433 type *p = page_address(eb->pages[0]); \
2434 u##bits res = le##bits##_to_cpu(p->member); \
2437 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2440 type *p = page_address(eb->pages[0]); \
2441 p->member = cpu_to_le##bits(val); \
2444 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2445 static inline u##bits btrfs_##name(type *s) \
2447 return le##bits##_to_cpu(s->member); \
2449 static inline void btrfs_set_##name(type *s, u##bits val) \
2451 s->member = cpu_to_le##bits(val); \
2454 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2455 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2456 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2457 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2458 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2459 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2461 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2462 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2463 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2464 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2465 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2466 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2468 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2471 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2473 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2475 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2477 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2479 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2480 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2482 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2484 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2486 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2489 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2491 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2494 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2496 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2499 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2500 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2501 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2502 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2503 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2504 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2505 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2506 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2507 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2508 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2509 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2511 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2513 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2516 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2518 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2520 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2522 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2524 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2526 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2527 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2531 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2532 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2534 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2537 unsigned long offset = (unsigned long)c;
2538 offset += offsetof(struct btrfs_chunk, stripe);
2539 offset += nr * sizeof(struct btrfs_stripe);
2540 return (struct btrfs_stripe *)offset;
2543 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2545 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2548 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2549 struct btrfs_chunk *c, int nr)
2551 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2554 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2555 struct btrfs_chunk *c, int nr)
2557 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2560 /* struct btrfs_block_group_item */
2561 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2563 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2565 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2566 struct btrfs_block_group_item, chunk_objectid, 64);
2568 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2569 struct btrfs_block_group_item, chunk_objectid, 64);
2570 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2571 struct btrfs_block_group_item, flags, 64);
2572 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2573 struct btrfs_block_group_item, flags, 64);
2575 /* struct btrfs_free_space_info */
2576 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
2578 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
2580 /* struct btrfs_inode_ref */
2581 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2582 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2584 /* struct btrfs_inode_extref */
2585 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2586 parent_objectid, 64);
2587 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2589 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2591 /* struct btrfs_inode_item */
2592 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2593 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2594 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2595 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2596 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2597 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2598 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2599 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2600 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2601 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2602 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2603 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2604 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2606 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2608 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2610 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2611 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2613 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2615 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2616 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2617 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2618 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2619 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2620 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2621 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2622 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2623 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2624 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2626 /* struct btrfs_dev_extent */
2627 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2629 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2630 chunk_objectid, 64);
2631 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2633 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2635 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2637 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2638 return (unsigned long)dev + ptr;
2641 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2642 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2644 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2646 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2649 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2651 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2652 struct btrfs_tree_block_info *item,
2653 struct btrfs_disk_key *key)
2655 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2658 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2659 struct btrfs_tree_block_info *item,
2660 struct btrfs_disk_key *key)
2662 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2665 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2667 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2669 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2671 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2674 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2677 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2679 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2682 static inline u32 btrfs_extent_inline_ref_size(int type)
2684 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2685 type == BTRFS_SHARED_BLOCK_REF_KEY)
2686 return sizeof(struct btrfs_extent_inline_ref);
2687 if (type == BTRFS_SHARED_DATA_REF_KEY)
2688 return sizeof(struct btrfs_shared_data_ref) +
2689 sizeof(struct btrfs_extent_inline_ref);
2690 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2691 return sizeof(struct btrfs_extent_data_ref) +
2692 offsetof(struct btrfs_extent_inline_ref, offset);
2697 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2698 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2700 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2701 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2703 /* struct btrfs_node */
2704 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2705 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2706 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2708 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2711 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2714 ptr = offsetof(struct btrfs_node, ptrs) +
2715 sizeof(struct btrfs_key_ptr) * nr;
2716 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2719 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2723 ptr = offsetof(struct btrfs_node, ptrs) +
2724 sizeof(struct btrfs_key_ptr) * nr;
2725 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2728 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2731 ptr = offsetof(struct btrfs_node, ptrs) +
2732 sizeof(struct btrfs_key_ptr) * nr;
2733 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2736 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2740 ptr = offsetof(struct btrfs_node, ptrs) +
2741 sizeof(struct btrfs_key_ptr) * nr;
2742 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2745 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2747 return offsetof(struct btrfs_node, ptrs) +
2748 sizeof(struct btrfs_key_ptr) * nr;
2751 void btrfs_node_key(struct extent_buffer *eb,
2752 struct btrfs_disk_key *disk_key, int nr);
2754 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2755 struct btrfs_disk_key *disk_key, int nr)
2758 ptr = btrfs_node_key_ptr_offset(nr);
2759 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2760 struct btrfs_key_ptr, key, disk_key);
2763 /* struct btrfs_item */
2764 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2765 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2766 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2767 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2769 static inline unsigned long btrfs_item_nr_offset(int nr)
2771 return offsetof(struct btrfs_leaf, items) +
2772 sizeof(struct btrfs_item) * nr;
2775 static inline struct btrfs_item *btrfs_item_nr(int nr)
2777 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2780 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2781 struct btrfs_item *item)
2783 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2786 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2788 return btrfs_item_end(eb, btrfs_item_nr(nr));
2791 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2793 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2796 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2798 return btrfs_item_size(eb, btrfs_item_nr(nr));
2801 static inline void btrfs_item_key(struct extent_buffer *eb,
2802 struct btrfs_disk_key *disk_key, int nr)
2804 struct btrfs_item *item = btrfs_item_nr(nr);
2805 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2808 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2809 struct btrfs_disk_key *disk_key, int nr)
2811 struct btrfs_item *item = btrfs_item_nr(nr);
2812 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2815 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2818 * struct btrfs_root_ref
2820 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2821 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2822 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2824 /* struct btrfs_dir_item */
2825 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2826 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2827 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2828 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2829 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2830 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2832 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2834 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2837 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2838 struct btrfs_dir_item *item,
2839 struct btrfs_disk_key *key)
2841 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2844 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2845 struct btrfs_dir_item *item,
2846 struct btrfs_disk_key *key)
2848 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2851 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2853 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2855 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2858 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2859 struct btrfs_free_space_header *h,
2860 struct btrfs_disk_key *key)
2862 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2865 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2866 struct btrfs_free_space_header *h,
2867 struct btrfs_disk_key *key)
2869 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2872 /* struct btrfs_disk_key */
2873 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2875 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2876 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2878 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2879 struct btrfs_disk_key *disk)
2881 cpu->offset = le64_to_cpu(disk->offset);
2882 cpu->type = disk->type;
2883 cpu->objectid = le64_to_cpu(disk->objectid);
2886 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2887 struct btrfs_key *cpu)
2889 disk->offset = cpu_to_le64(cpu->offset);
2890 disk->type = cpu->type;
2891 disk->objectid = cpu_to_le64(cpu->objectid);
2894 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2895 struct btrfs_key *key, int nr)
2897 struct btrfs_disk_key disk_key;
2898 btrfs_node_key(eb, &disk_key, nr);
2899 btrfs_disk_key_to_cpu(key, &disk_key);
2902 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2903 struct btrfs_key *key, int nr)
2905 struct btrfs_disk_key disk_key;
2906 btrfs_item_key(eb, &disk_key, nr);
2907 btrfs_disk_key_to_cpu(key, &disk_key);
2910 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2911 struct btrfs_dir_item *item,
2912 struct btrfs_key *key)
2914 struct btrfs_disk_key disk_key;
2915 btrfs_dir_item_key(eb, item, &disk_key);
2916 btrfs_disk_key_to_cpu(key, &disk_key);
2920 static inline u8 btrfs_key_type(struct btrfs_key *key)
2925 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2930 /* struct btrfs_header */
2931 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2932 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2934 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2935 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2936 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2937 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2938 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2940 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2941 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2943 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2945 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2947 return (btrfs_header_flags(eb) & flag) == flag;
2950 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2952 u64 flags = btrfs_header_flags(eb);
2953 btrfs_set_header_flags(eb, flags | flag);
2954 return (flags & flag) == flag;
2957 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2959 u64 flags = btrfs_header_flags(eb);
2960 btrfs_set_header_flags(eb, flags & ~flag);
2961 return (flags & flag) == flag;
2964 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2966 u64 flags = btrfs_header_flags(eb);
2967 return flags >> BTRFS_BACKREF_REV_SHIFT;
2970 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2973 u64 flags = btrfs_header_flags(eb);
2974 flags &= ~BTRFS_BACKREF_REV_MASK;
2975 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2976 btrfs_set_header_flags(eb, flags);
2979 static inline unsigned long btrfs_header_fsid(void)
2981 return offsetof(struct btrfs_header, fsid);
2984 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2986 return offsetof(struct btrfs_header, chunk_tree_uuid);
2989 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2991 return btrfs_header_level(eb) == 0;
2994 /* struct btrfs_root_item */
2995 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2997 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2998 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2999 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
3001 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
3003 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
3004 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
3005 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
3006 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
3007 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
3008 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
3009 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
3010 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
3012 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
3014 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
3016 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
3018 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
3020 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
3023 static inline bool btrfs_root_readonly(struct btrfs_root *root)
3025 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
3028 static inline bool btrfs_root_dead(struct btrfs_root *root)
3030 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
3033 /* struct btrfs_root_backup */
3034 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
3036 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
3038 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
3039 tree_root_level, 8);
3041 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
3043 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
3044 chunk_root_gen, 64);
3045 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
3046 chunk_root_level, 8);
3048 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
3050 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
3051 extent_root_gen, 64);
3052 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
3053 extent_root_level, 8);
3055 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
3057 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
3059 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
3062 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
3064 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
3066 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
3069 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
3071 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
3073 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
3074 csum_root_level, 8);
3075 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
3077 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
3079 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
3082 /* struct btrfs_balance_item */
3083 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
3085 static inline void btrfs_balance_data(struct extent_buffer *eb,
3086 struct btrfs_balance_item *bi,
3087 struct btrfs_disk_balance_args *ba)
3089 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3092 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
3093 struct btrfs_balance_item *bi,
3094 struct btrfs_disk_balance_args *ba)
3096 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3099 static inline void btrfs_balance_meta(struct extent_buffer *eb,
3100 struct btrfs_balance_item *bi,
3101 struct btrfs_disk_balance_args *ba)
3103 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3106 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
3107 struct btrfs_balance_item *bi,
3108 struct btrfs_disk_balance_args *ba)
3110 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3113 static inline void btrfs_balance_sys(struct extent_buffer *eb,
3114 struct btrfs_balance_item *bi,
3115 struct btrfs_disk_balance_args *ba)
3117 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3120 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
3121 struct btrfs_balance_item *bi,
3122 struct btrfs_disk_balance_args *ba)
3124 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3128 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3129 struct btrfs_disk_balance_args *disk)
3131 memset(cpu, 0, sizeof(*cpu));
3133 cpu->profiles = le64_to_cpu(disk->profiles);
3134 cpu->usage = le64_to_cpu(disk->usage);
3135 cpu->devid = le64_to_cpu(disk->devid);
3136 cpu->pstart = le64_to_cpu(disk->pstart);
3137 cpu->pend = le64_to_cpu(disk->pend);
3138 cpu->vstart = le64_to_cpu(disk->vstart);
3139 cpu->vend = le64_to_cpu(disk->vend);
3140 cpu->target = le64_to_cpu(disk->target);
3141 cpu->flags = le64_to_cpu(disk->flags);
3142 cpu->limit = le64_to_cpu(disk->limit);
3146 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3147 struct btrfs_balance_args *cpu)
3149 memset(disk, 0, sizeof(*disk));
3151 disk->profiles = cpu_to_le64(cpu->profiles);
3152 disk->usage = cpu_to_le64(cpu->usage);
3153 disk->devid = cpu_to_le64(cpu->devid);
3154 disk->pstart = cpu_to_le64(cpu->pstart);
3155 disk->pend = cpu_to_le64(cpu->pend);
3156 disk->vstart = cpu_to_le64(cpu->vstart);
3157 disk->vend = cpu_to_le64(cpu->vend);
3158 disk->target = cpu_to_le64(cpu->target);
3159 disk->flags = cpu_to_le64(cpu->flags);
3160 disk->limit = cpu_to_le64(cpu->limit);
3163 /* struct btrfs_super_block */
3164 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3165 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3166 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3168 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3169 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3170 struct btrfs_super_block, sys_chunk_array_size, 32);
3171 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3172 struct btrfs_super_block, chunk_root_generation, 64);
3173 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3175 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3177 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
3178 chunk_root_level, 8);
3179 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3181 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3182 log_root_transid, 64);
3183 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3185 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3187 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3189 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3191 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3193 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3195 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3196 root_dir_objectid, 64);
3197 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3199 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3201 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
3202 compat_ro_flags, 64);
3203 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3204 incompat_flags, 64);
3205 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3207 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3208 cache_generation, 64);
3209 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3210 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3211 uuid_tree_generation, 64);
3213 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3215 u16 t = btrfs_super_csum_type(s);
3217 * csum type is validated at mount time
3219 return btrfs_csum_sizes[t];
3222 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3224 return offsetof(struct btrfs_leaf, items);
3227 /* struct btrfs_file_extent_item */
3228 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3229 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3230 struct btrfs_file_extent_item, disk_bytenr, 64);
3231 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3232 struct btrfs_file_extent_item, offset, 64);
3233 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3234 struct btrfs_file_extent_item, generation, 64);
3235 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3236 struct btrfs_file_extent_item, num_bytes, 64);
3237 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3238 struct btrfs_file_extent_item, disk_num_bytes, 64);
3239 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3240 struct btrfs_file_extent_item, compression, 8);
3242 static inline unsigned long
3243 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3245 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3248 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3250 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3253 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3255 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3257 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3258 disk_num_bytes, 64);
3259 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3261 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3263 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3265 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3267 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3269 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3270 other_encoding, 16);
3273 * this returns the number of bytes used by the item on disk, minus the
3274 * size of any extent headers. If a file is compressed on disk, this is
3275 * the compressed size
3277 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3278 struct btrfs_item *e)
3280 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
3283 /* this returns the number of file bytes represented by the inline item.
3284 * If an item is compressed, this is the uncompressed size
3286 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3288 struct btrfs_file_extent_item *fi)
3290 struct btrfs_map_token token;
3292 btrfs_init_map_token(&token);
3294 * return the space used on disk if this item isn't
3295 * compressed or encoded
3297 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3298 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3299 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3300 return btrfs_file_extent_inline_item_len(eb,
3301 btrfs_item_nr(slot));
3304 /* otherwise use the ram bytes field */
3305 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3309 /* btrfs_dev_stats_item */
3310 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3311 struct btrfs_dev_stats_item *ptr,
3316 read_extent_buffer(eb, &val,
3317 offsetof(struct btrfs_dev_stats_item, values) +
3318 ((unsigned long)ptr) + (index * sizeof(u64)),
3323 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3324 struct btrfs_dev_stats_item *ptr,
3327 write_extent_buffer(eb, &val,
3328 offsetof(struct btrfs_dev_stats_item, values) +
3329 ((unsigned long)ptr) + (index * sizeof(u64)),
3333 /* btrfs_qgroup_status_item */
3334 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3336 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3338 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3340 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3343 /* btrfs_qgroup_info_item */
3344 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3346 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3347 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3349 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3350 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3353 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3354 struct btrfs_qgroup_info_item, generation, 64);
3355 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3357 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3358 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3359 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3361 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3362 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3364 /* btrfs_qgroup_limit_item */
3365 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3367 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3369 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3371 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3373 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3376 /* btrfs_dev_replace_item */
3377 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3378 struct btrfs_dev_replace_item, src_devid, 64);
3379 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3380 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3382 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3384 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3386 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3388 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3389 num_write_errors, 64);
3390 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3391 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3393 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3395 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3398 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3399 struct btrfs_dev_replace_item, src_devid, 64);
3400 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3401 struct btrfs_dev_replace_item,
3402 cont_reading_from_srcdev_mode, 64);
3403 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3404 struct btrfs_dev_replace_item, replace_state, 64);
3405 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3406 struct btrfs_dev_replace_item, time_started, 64);
3407 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3408 struct btrfs_dev_replace_item, time_stopped, 64);
3409 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3410 struct btrfs_dev_replace_item, num_write_errors, 64);
3411 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3412 struct btrfs_dev_replace_item,
3413 num_uncorrectable_read_errors, 64);
3414 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3415 struct btrfs_dev_replace_item, cursor_left, 64);
3416 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3417 struct btrfs_dev_replace_item, cursor_right, 64);
3419 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3421 return sb->s_fs_info;
3424 /* helper function to cast into the data area of the leaf. */
3425 #define btrfs_item_ptr(leaf, slot, type) \
3426 ((type *)(btrfs_leaf_data(leaf) + \
3427 btrfs_item_offset_nr(leaf, slot)))
3429 #define btrfs_item_ptr_offset(leaf, slot) \
3430 ((unsigned long)(btrfs_leaf_data(leaf) + \
3431 btrfs_item_offset_nr(leaf, slot)))
3433 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3435 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3436 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3439 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3441 return mapping_gfp_constraint(mapping, ~__GFP_FS);
3446 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
3448 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3451 return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
3455 * Doing a truncate won't result in new nodes or leaves, just what we need for
3458 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3461 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3464 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3465 struct btrfs_root *root);
3466 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3467 struct btrfs_root *root);
3468 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3469 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3470 struct btrfs_root *root, unsigned long count);
3471 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3472 unsigned long count, int wait);
3473 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3474 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3475 struct btrfs_root *root, u64 bytenr,
3476 u64 offset, int metadata, u64 *refs, u64 *flags);
3477 int btrfs_pin_extent(struct btrfs_root *root,
3478 u64 bytenr, u64 num, int reserved);
3479 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3480 u64 bytenr, u64 num_bytes);
3481 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3482 struct extent_buffer *eb);
3483 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3484 struct btrfs_root *root,
3485 u64 objectid, u64 offset, u64 bytenr);
3486 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3487 struct btrfs_fs_info *info,
3489 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
3490 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3491 int get_block_group_index(struct btrfs_block_group_cache *cache);
3492 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3493 struct btrfs_root *root, u64 parent,
3495 struct btrfs_disk_key *key, int level,
3496 u64 hint, u64 empty_size);
3497 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3498 struct btrfs_root *root,
3499 struct extent_buffer *buf,
3500 u64 parent, int last_ref);
3501 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3502 struct btrfs_root *root,
3503 u64 root_objectid, u64 owner,
3504 u64 offset, u64 ram_bytes,
3505 struct btrfs_key *ins);
3506 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3507 struct btrfs_root *root,
3508 u64 root_objectid, u64 owner, u64 offset,
3509 struct btrfs_key *ins);
3510 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3511 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3512 struct btrfs_key *ins, int is_data, int delalloc);
3513 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3514 struct extent_buffer *buf, int full_backref);
3515 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3516 struct extent_buffer *buf, int full_backref);
3517 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3518 struct btrfs_root *root,
3519 u64 bytenr, u64 num_bytes, u64 flags,
3520 int level, int is_data);
3521 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3522 struct btrfs_root *root,
3523 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3524 u64 owner, u64 offset);
3526 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3528 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3529 u64 start, u64 len);
3530 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3531 struct btrfs_root *root);
3532 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3533 struct btrfs_root *root);
3534 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3535 struct btrfs_root *root,
3536 u64 bytenr, u64 num_bytes, u64 parent,
3537 u64 root_objectid, u64 owner, u64 offset);
3539 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
3540 struct btrfs_root *root);
3541 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3542 struct btrfs_root *root);
3543 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
3544 struct btrfs_root *root);
3545 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3546 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3547 int btrfs_read_block_groups(struct btrfs_root *root);
3548 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3549 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3550 struct btrfs_root *root, u64 bytes_used,
3551 u64 type, u64 chunk_objectid, u64 chunk_offset,
3553 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
3554 struct btrfs_fs_info *fs_info,
3555 const u64 chunk_offset);
3556 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3557 struct btrfs_root *root, u64 group_start,
3558 struct extent_map *em);
3559 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3560 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
3561 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
3562 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3563 struct btrfs_root *root);
3564 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3565 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3567 enum btrfs_reserve_flush_enum {
3568 /* If we are in the transaction, we can't flush anything.*/
3569 BTRFS_RESERVE_NO_FLUSH,
3571 * Flushing delalloc may cause deadlock somewhere, in this
3572 * case, use FLUSH LIMIT
3574 BTRFS_RESERVE_FLUSH_LIMIT,
3575 BTRFS_RESERVE_FLUSH_ALL,
3578 int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
3579 int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
3580 void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
3581 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
3583 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3584 struct btrfs_root *root);
3585 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
3586 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3587 struct inode *inode);
3588 void btrfs_orphan_release_metadata(struct inode *inode);
3589 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3590 struct btrfs_block_rsv *rsv,
3592 u64 *qgroup_reserved, bool use_global_rsv);
3593 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3594 struct btrfs_block_rsv *rsv,
3595 u64 qgroup_reserved);
3596 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3597 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3598 int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
3599 void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
3600 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3601 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3602 unsigned short type);
3603 void btrfs_free_block_rsv(struct btrfs_root *root,
3604 struct btrfs_block_rsv *rsv);
3605 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3606 int btrfs_block_rsv_add(struct btrfs_root *root,
3607 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3608 enum btrfs_reserve_flush_enum flush);
3609 int btrfs_block_rsv_check(struct btrfs_root *root,
3610 struct btrfs_block_rsv *block_rsv, int min_factor);
3611 int btrfs_block_rsv_refill(struct btrfs_root *root,
3612 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3613 enum btrfs_reserve_flush_enum flush);
3614 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3615 struct btrfs_block_rsv *dst_rsv,
3617 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3618 struct btrfs_block_rsv *dest, u64 num_bytes,
3620 void btrfs_block_rsv_release(struct btrfs_root *root,
3621 struct btrfs_block_rsv *block_rsv,
3623 int btrfs_inc_block_group_ro(struct btrfs_root *root,
3624 struct btrfs_block_group_cache *cache);
3625 void btrfs_dec_block_group_ro(struct btrfs_root *root,
3626 struct btrfs_block_group_cache *cache);
3627 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3628 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3629 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3630 u64 start, u64 end);
3631 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
3632 u64 num_bytes, u64 *actual_bytes);
3633 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3634 struct btrfs_root *root, u64 type);
3635 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3637 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3638 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3639 struct btrfs_fs_info *fs_info);
3640 int __get_raid_index(u64 flags);
3641 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3642 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3643 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
3644 void check_system_chunk(struct btrfs_trans_handle *trans,
3645 struct btrfs_root *root,
3647 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
3648 struct btrfs_fs_info *info, u64 start, u64 end);
3651 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3652 int level, int *slot);
3653 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3654 int btrfs_previous_item(struct btrfs_root *root,
3655 struct btrfs_path *path, u64 min_objectid,
3657 int btrfs_previous_extent_item(struct btrfs_root *root,
3658 struct btrfs_path *path, u64 min_objectid);
3659 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
3660 struct btrfs_path *path,
3661 struct btrfs_key *new_key);
3662 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3663 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3664 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3665 struct btrfs_key *key, int lowest_level,
3667 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3668 struct btrfs_path *path,
3670 enum btrfs_compare_tree_result {
3671 BTRFS_COMPARE_TREE_NEW,
3672 BTRFS_COMPARE_TREE_DELETED,
3673 BTRFS_COMPARE_TREE_CHANGED,
3674 BTRFS_COMPARE_TREE_SAME,
3676 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3677 struct btrfs_root *right_root,
3678 struct btrfs_path *left_path,
3679 struct btrfs_path *right_path,
3680 struct btrfs_key *key,
3681 enum btrfs_compare_tree_result result,
3683 int btrfs_compare_trees(struct btrfs_root *left_root,
3684 struct btrfs_root *right_root,
3685 btrfs_changed_cb_t cb, void *ctx);
3686 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3687 struct btrfs_root *root, struct extent_buffer *buf,
3688 struct extent_buffer *parent, int parent_slot,
3689 struct extent_buffer **cow_ret);
3690 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3691 struct btrfs_root *root,
3692 struct extent_buffer *buf,
3693 struct extent_buffer **cow_ret, u64 new_root_objectid);
3694 int btrfs_block_can_be_shared(struct btrfs_root *root,
3695 struct extent_buffer *buf);
3696 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3698 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3699 u32 new_size, int from_end);
3700 int btrfs_split_item(struct btrfs_trans_handle *trans,
3701 struct btrfs_root *root,
3702 struct btrfs_path *path,
3703 struct btrfs_key *new_key,
3704 unsigned long split_offset);
3705 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3706 struct btrfs_root *root,
3707 struct btrfs_path *path,
3708 struct btrfs_key *new_key);
3709 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3710 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3711 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3712 *root, struct btrfs_key *key, struct btrfs_path *p, int
3714 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3715 struct btrfs_path *p, u64 time_seq);
3716 int btrfs_search_slot_for_read(struct btrfs_root *root,
3717 struct btrfs_key *key, struct btrfs_path *p,
3718 int find_higher, int return_any);
3719 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3720 struct btrfs_root *root, struct extent_buffer *parent,
3721 int start_slot, u64 *last_ret,
3722 struct btrfs_key *progress);
3723 void btrfs_release_path(struct btrfs_path *p);
3724 struct btrfs_path *btrfs_alloc_path(void);
3725 void btrfs_free_path(struct btrfs_path *p);
3726 void btrfs_set_path_blocking(struct btrfs_path *p);
3727 void btrfs_clear_path_blocking(struct btrfs_path *p,
3728 struct extent_buffer *held, int held_rw);
3729 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3731 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3732 struct btrfs_path *path, int slot, int nr);
3733 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3734 struct btrfs_root *root,
3735 struct btrfs_path *path)
3737 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3740 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3741 struct btrfs_key *cpu_key, u32 *data_size,
3742 u32 total_data, u32 total_size, int nr);
3743 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3744 *root, struct btrfs_key *key, void *data, u32 data_size);
3745 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3746 struct btrfs_root *root,
3747 struct btrfs_path *path,
3748 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3750 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3751 struct btrfs_root *root,
3752 struct btrfs_path *path,
3753 struct btrfs_key *key,
3756 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3759 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3760 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3761 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3763 static inline int btrfs_next_old_item(struct btrfs_root *root,
3764 struct btrfs_path *p, u64 time_seq)
3767 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3768 return btrfs_next_old_leaf(root, p, time_seq);
3771 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3773 return btrfs_next_old_item(root, p, 0);
3775 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3776 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3777 struct btrfs_block_rsv *block_rsv,
3778 int update_ref, int for_reloc);
3779 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3780 struct btrfs_root *root,
3781 struct extent_buffer *node,
3782 struct extent_buffer *parent);
3783 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3786 * Get synced with close_ctree()
3789 return fs_info->closing;
3793 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3794 * anything except sleeping. This function is used to check the status of
3797 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3799 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3800 btrfs_fs_closing(root->fs_info));
3803 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3805 kfree(fs_info->balance_ctl);
3806 kfree(fs_info->delayed_root);
3807 kfree(fs_info->extent_root);
3808 kfree(fs_info->tree_root);
3809 kfree(fs_info->chunk_root);
3810 kfree(fs_info->dev_root);
3811 kfree(fs_info->csum_root);
3812 kfree(fs_info->quota_root);
3813 kfree(fs_info->uuid_root);
3814 kfree(fs_info->free_space_root);
3815 kfree(fs_info->super_copy);
3816 kfree(fs_info->super_for_commit);
3817 security_free_mnt_opts(&fs_info->security_opts);
3821 /* tree mod log functions from ctree.c */
3822 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3823 struct seq_list *elem);
3824 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3825 struct seq_list *elem);
3826 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3829 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3830 struct btrfs_path *path,
3831 u64 root_id, u64 ref_id);
3832 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3833 struct btrfs_root *tree_root,
3834 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3835 const char *name, int name_len);
3836 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3837 struct btrfs_root *tree_root,
3838 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3839 const char *name, int name_len);
3840 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3841 struct btrfs_key *key);
3842 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3843 *root, struct btrfs_key *key, struct btrfs_root_item
3845 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3846 struct btrfs_root *root,
3847 struct btrfs_key *key,
3848 struct btrfs_root_item *item);
3849 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3850 struct btrfs_path *path, struct btrfs_root_item *root_item,
3851 struct btrfs_key *root_key);
3852 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3853 void btrfs_set_root_node(struct btrfs_root_item *item,
3854 struct extent_buffer *node);
3855 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3856 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3857 struct btrfs_root *root);
3860 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3861 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3863 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3864 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3866 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3867 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3871 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3872 const char *name, int name_len);
3873 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3874 struct btrfs_root *root, const char *name,
3875 int name_len, struct inode *dir,
3876 struct btrfs_key *location, u8 type, u64 index);
3877 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3878 struct btrfs_root *root,
3879 struct btrfs_path *path, u64 dir,
3880 const char *name, int name_len,
3882 struct btrfs_dir_item *
3883 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3884 struct btrfs_root *root,
3885 struct btrfs_path *path, u64 dir,
3886 u64 objectid, const char *name, int name_len,
3888 struct btrfs_dir_item *
3889 btrfs_search_dir_index_item(struct btrfs_root *root,
3890 struct btrfs_path *path, u64 dirid,
3891 const char *name, int name_len);
3892 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3893 struct btrfs_root *root,
3894 struct btrfs_path *path,
3895 struct btrfs_dir_item *di);
3896 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3897 struct btrfs_root *root,
3898 struct btrfs_path *path, u64 objectid,
3899 const char *name, u16 name_len,
3900 const void *data, u16 data_len);
3901 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3902 struct btrfs_root *root,
3903 struct btrfs_path *path, u64 dir,
3904 const char *name, u16 name_len,
3906 int verify_dir_item(struct btrfs_root *root,
3907 struct extent_buffer *leaf,
3908 struct btrfs_dir_item *dir_item);
3909 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3910 struct btrfs_path *path,
3915 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3916 struct btrfs_root *root, u64 offset);
3917 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3918 struct btrfs_root *root, u64 offset);
3919 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3922 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3923 struct btrfs_root *root,
3924 const char *name, int name_len,
3925 u64 inode_objectid, u64 ref_objectid, u64 index);
3926 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3927 struct btrfs_root *root,
3928 const char *name, int name_len,
3929 u64 inode_objectid, u64 ref_objectid, u64 *index);
3930 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3931 struct btrfs_root *root,
3932 struct btrfs_path *path, u64 objectid);
3933 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3934 *root, struct btrfs_path *path,
3935 struct btrfs_key *location, int mod);
3937 struct btrfs_inode_extref *
3938 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3939 struct btrfs_root *root,
3940 struct btrfs_path *path,
3941 const char *name, int name_len,
3942 u64 inode_objectid, u64 ref_objectid, int ins_len,
3945 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3946 u64 ref_objectid, const char *name,
3948 struct btrfs_inode_extref **extref_ret);
3951 struct btrfs_dio_private;
3952 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3953 struct btrfs_root *root, u64 bytenr, u64 len);
3954 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3955 struct bio *bio, u32 *dst);
3956 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3957 struct bio *bio, u64 logical_offset);
3958 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3959 struct btrfs_root *root,
3960 u64 objectid, u64 pos,
3961 u64 disk_offset, u64 disk_num_bytes,
3962 u64 num_bytes, u64 offset, u64 ram_bytes,
3963 u8 compression, u8 encryption, u16 other_encoding);
3964 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3965 struct btrfs_root *root,
3966 struct btrfs_path *path, u64 objectid,
3967 u64 bytenr, int mod);
3968 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3969 struct btrfs_root *root,
3970 struct btrfs_ordered_sum *sums);
3971 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3972 struct bio *bio, u64 file_start, int contig);
3973 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3974 struct list_head *list, int search_commit);
3975 void btrfs_extent_item_to_extent_map(struct inode *inode,
3976 const struct btrfs_path *path,
3977 struct btrfs_file_extent_item *fi,
3978 const bool new_inline,
3979 struct extent_map *em);
3982 struct btrfs_delalloc_work {
3983 struct inode *inode;
3985 struct completion completion;
3986 struct list_head list;
3987 struct btrfs_work work;
3990 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3992 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3994 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3995 size_t pg_offset, u64 start, u64 len,
3997 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3998 u64 *orig_start, u64 *orig_block_len,
4001 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
4002 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
4003 #define ClearPageChecked ClearPageFsMisc
4004 #define SetPageChecked SetPageFsMisc
4005 #define PageChecked PageFsMisc
4008 /* This forces readahead on a given range of bytes in an inode */
4009 static inline void btrfs_force_ra(struct address_space *mapping,
4010 struct file_ra_state *ra, struct file *file,
4011 pgoff_t offset, unsigned long req_size)
4013 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
4016 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
4017 int btrfs_set_inode_index(struct inode *dir, u64 *index);
4018 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
4019 struct btrfs_root *root,
4020 struct inode *dir, struct inode *inode,
4021 const char *name, int name_len);
4022 int btrfs_add_link(struct btrfs_trans_handle *trans,
4023 struct inode *parent_inode, struct inode *inode,
4024 const char *name, int name_len, int add_backref, u64 index);
4025 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
4026 struct btrfs_root *root,
4027 struct inode *dir, u64 objectid,
4028 const char *name, int name_len);
4029 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
4031 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
4032 struct btrfs_root *root,
4033 struct inode *inode, u64 new_size,
4036 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
4037 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
4039 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
4040 struct extent_state **cached_state);
4041 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
4042 struct btrfs_root *new_root,
4043 struct btrfs_root *parent_root,
4045 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
4046 size_t size, struct bio *bio,
4047 unsigned long bio_flags);
4048 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
4049 int btrfs_readpage(struct file *file, struct page *page);
4050 void btrfs_evict_inode(struct inode *inode);
4051 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
4052 struct inode *btrfs_alloc_inode(struct super_block *sb);
4053 void btrfs_destroy_inode(struct inode *inode);
4054 int btrfs_drop_inode(struct inode *inode);
4055 int btrfs_init_cachep(void);
4056 void btrfs_destroy_cachep(void);
4057 long btrfs_ioctl_trans_end(struct file *file);
4058 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
4059 struct btrfs_root *root, int *was_new);
4060 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
4061 size_t pg_offset, u64 start, u64 end,
4063 int btrfs_update_inode(struct btrfs_trans_handle *trans,
4064 struct btrfs_root *root,
4065 struct inode *inode);
4066 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
4067 struct btrfs_root *root, struct inode *inode);
4068 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
4069 int btrfs_orphan_cleanup(struct btrfs_root *root);
4070 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
4071 struct btrfs_root *root);
4072 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
4073 void btrfs_invalidate_inodes(struct btrfs_root *root);
4074 void btrfs_add_delayed_iput(struct inode *inode);
4075 void btrfs_run_delayed_iputs(struct btrfs_root *root);
4076 int btrfs_prealloc_file_range(struct inode *inode, int mode,
4077 u64 start, u64 num_bytes, u64 min_size,
4078 loff_t actual_len, u64 *alloc_hint);
4079 int btrfs_prealloc_file_range_trans(struct inode *inode,
4080 struct btrfs_trans_handle *trans, int mode,
4081 u64 start, u64 num_bytes, u64 min_size,
4082 loff_t actual_len, u64 *alloc_hint);
4083 int btrfs_inode_check_errors(struct inode *inode);
4084 extern const struct dentry_operations btrfs_dentry_operations;
4085 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4086 void btrfs_test_inode_set_ops(struct inode *inode);
4090 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
4091 int btrfs_ioctl_get_supported_features(void __user *arg);
4092 void btrfs_update_iflags(struct inode *inode);
4093 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
4094 int btrfs_is_empty_uuid(u8 *uuid);
4095 int btrfs_defrag_file(struct inode *inode, struct file *file,
4096 struct btrfs_ioctl_defrag_range_args *range,
4097 u64 newer_than, unsigned long max_pages);
4098 void btrfs_get_block_group_info(struct list_head *groups_list,
4099 struct btrfs_ioctl_space_info *space);
4100 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
4101 struct btrfs_ioctl_balance_args *bargs);
4102 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
4103 struct file *dst_file, u64 dst_loff);
4106 int btrfs_auto_defrag_init(void);
4107 void btrfs_auto_defrag_exit(void);
4108 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
4109 struct inode *inode);
4110 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
4111 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
4112 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
4113 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
4115 extern const struct file_operations btrfs_file_operations;
4116 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
4117 struct btrfs_root *root, struct inode *inode,
4118 struct btrfs_path *path, u64 start, u64 end,
4119 u64 *drop_end, int drop_cache,
4121 u32 extent_item_size,
4123 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
4124 struct btrfs_root *root, struct inode *inode, u64 start,
4125 u64 end, int drop_cache);
4126 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
4127 struct inode *inode, u64 start, u64 end);
4128 int btrfs_release_file(struct inode *inode, struct file *file);
4129 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
4130 struct page **pages, size_t num_pages,
4131 loff_t pos, size_t write_bytes,
4132 struct extent_state **cached);
4133 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
4134 ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
4135 struct file *file_out, loff_t pos_out,
4136 size_t len, unsigned int flags);
4137 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
4138 struct file *file_out, loff_t pos_out, u64 len);
4141 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
4142 struct btrfs_root *root);
4145 int btrfs_init_sysfs(void);
4146 void btrfs_exit_sysfs(void);
4147 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
4148 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
4151 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
4154 int btrfs_parse_options(struct btrfs_root *root, char *options,
4155 unsigned long new_flags);
4156 int btrfs_sync_fs(struct super_block *sb, int wait);
4158 #ifdef CONFIG_PRINTK
4160 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4162 static inline __printf(2, 3)
4163 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4168 #define btrfs_emerg(fs_info, fmt, args...) \
4169 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4170 #define btrfs_alert(fs_info, fmt, args...) \
4171 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4172 #define btrfs_crit(fs_info, fmt, args...) \
4173 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4174 #define btrfs_err(fs_info, fmt, args...) \
4175 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4176 #define btrfs_warn(fs_info, fmt, args...) \
4177 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4178 #define btrfs_notice(fs_info, fmt, args...) \
4179 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4180 #define btrfs_info(fs_info, fmt, args...) \
4181 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4184 * Wrappers that use printk_in_rcu
4186 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
4187 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4188 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
4189 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4190 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
4191 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4192 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
4193 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
4194 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
4195 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4196 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
4197 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4198 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
4199 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
4202 * Wrappers that use a ratelimited printk_in_rcu
4204 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
4205 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4206 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
4207 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4208 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
4209 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4210 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
4211 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
4212 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
4213 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4214 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
4215 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4216 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
4217 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
4220 * Wrappers that use a ratelimited printk
4222 #define btrfs_emerg_rl(fs_info, fmt, args...) \
4223 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
4224 #define btrfs_alert_rl(fs_info, fmt, args...) \
4225 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
4226 #define btrfs_crit_rl(fs_info, fmt, args...) \
4227 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
4228 #define btrfs_err_rl(fs_info, fmt, args...) \
4229 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
4230 #define btrfs_warn_rl(fs_info, fmt, args...) \
4231 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
4232 #define btrfs_notice_rl(fs_info, fmt, args...) \
4233 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
4234 #define btrfs_info_rl(fs_info, fmt, args...) \
4235 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
4237 #define btrfs_debug(fs_info, fmt, args...) \
4238 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4239 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4240 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4241 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4242 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4243 #define btrfs_debug_rl(fs_info, fmt, args...) \
4244 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
4246 #define btrfs_debug(fs_info, fmt, args...) \
4247 no_printk(KERN_DEBUG fmt, ##args)
4248 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4249 no_printk(KERN_DEBUG fmt, ##args)
4250 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4251 no_printk(KERN_DEBUG fmt, ##args)
4252 #define btrfs_debug_rl(fs_info, fmt, args...) \
4253 no_printk(KERN_DEBUG fmt, ##args)
4256 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
4259 btrfs_printk(fs_info, fmt, ##args); \
4260 rcu_read_unlock(); \
4263 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
4265 static DEFINE_RATELIMIT_STATE(_rs, \
4266 DEFAULT_RATELIMIT_INTERVAL, \
4267 DEFAULT_RATELIMIT_BURST); \
4268 if (__ratelimit(&_rs)) \
4269 btrfs_printk(fs_info, fmt, ##args); \
4272 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
4275 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
4276 rcu_read_unlock(); \
4279 #ifdef CONFIG_BTRFS_ASSERT
4282 static inline void assfail(char *expr, char *file, int line)
4284 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4289 #define ASSERT(expr) \
4290 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4292 #define ASSERT(expr) ((void)0)
4295 #define btrfs_assert()
4298 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
4299 unsigned int line, int errno, const char *fmt, ...);
4301 const char *btrfs_decode_error(int errno);
4304 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4305 struct btrfs_root *root, const char *function,
4306 unsigned int line, int errno);
4308 #define btrfs_set_fs_incompat(__fs_info, opt) \
4309 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4311 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4314 struct btrfs_super_block *disk_super;
4317 disk_super = fs_info->super_copy;
4318 features = btrfs_super_incompat_flags(disk_super);
4319 if (!(features & flag)) {
4320 spin_lock(&fs_info->super_lock);
4321 features = btrfs_super_incompat_flags(disk_super);
4322 if (!(features & flag)) {
4324 btrfs_set_super_incompat_flags(disk_super, features);
4325 btrfs_info(fs_info, "setting %llu feature flag",
4328 spin_unlock(&fs_info->super_lock);
4332 #define btrfs_clear_fs_incompat(__fs_info, opt) \
4333 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4335 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
4338 struct btrfs_super_block *disk_super;
4341 disk_super = fs_info->super_copy;
4342 features = btrfs_super_incompat_flags(disk_super);
4343 if (features & flag) {
4344 spin_lock(&fs_info->super_lock);
4345 features = btrfs_super_incompat_flags(disk_super);
4346 if (features & flag) {
4348 btrfs_set_super_incompat_flags(disk_super, features);
4349 btrfs_info(fs_info, "clearing %llu feature flag",
4352 spin_unlock(&fs_info->super_lock);
4356 #define btrfs_fs_incompat(fs_info, opt) \
4357 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4359 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4361 struct btrfs_super_block *disk_super;
4362 disk_super = fs_info->super_copy;
4363 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4366 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
4367 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4369 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
4372 struct btrfs_super_block *disk_super;
4375 disk_super = fs_info->super_copy;
4376 features = btrfs_super_compat_ro_flags(disk_super);
4377 if (!(features & flag)) {
4378 spin_lock(&fs_info->super_lock);
4379 features = btrfs_super_compat_ro_flags(disk_super);
4380 if (!(features & flag)) {
4382 btrfs_set_super_compat_ro_flags(disk_super, features);
4383 btrfs_info(fs_info, "setting %llu ro feature flag",
4386 spin_unlock(&fs_info->super_lock);
4390 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
4391 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4393 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
4396 struct btrfs_super_block *disk_super;
4399 disk_super = fs_info->super_copy;
4400 features = btrfs_super_compat_ro_flags(disk_super);
4401 if (features & flag) {
4402 spin_lock(&fs_info->super_lock);
4403 features = btrfs_super_compat_ro_flags(disk_super);
4404 if (features & flag) {
4406 btrfs_set_super_compat_ro_flags(disk_super, features);
4407 btrfs_info(fs_info, "clearing %llu ro feature flag",
4410 spin_unlock(&fs_info->super_lock);
4414 #define btrfs_fs_compat_ro(fs_info, opt) \
4415 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4417 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
4419 struct btrfs_super_block *disk_super;
4420 disk_super = fs_info->super_copy;
4421 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
4425 * Call btrfs_abort_transaction as early as possible when an error condition is
4426 * detected, that way the exact line number is reported.
4428 #define btrfs_abort_transaction(trans, root, errno) \
4430 /* Report first abort since mount */ \
4431 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
4432 &((root)->fs_info->fs_state))) { \
4433 WARN(1, KERN_DEBUG \
4434 "BTRFS: Transaction aborted (error %d)\n", \
4437 __btrfs_abort_transaction((trans), (root), __func__, \
4438 __LINE__, (errno)); \
4441 #define btrfs_std_error(fs_info, errno, fmt, args...) \
4443 __btrfs_std_error((fs_info), __func__, __LINE__, \
4444 (errno), fmt, ##args); \
4449 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4450 unsigned int line, int errno, const char *fmt, ...);
4453 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4454 * will panic(). Otherwise we BUG() here.
4456 #define btrfs_panic(fs_info, errno, fmt, args...) \
4458 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4463 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4464 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4465 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4466 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4467 struct inode *inode, struct inode *dir);
4469 #define btrfs_get_acl NULL
4470 #define btrfs_set_acl NULL
4471 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4472 struct inode *inode, struct inode *dir)
4479 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4480 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4481 struct btrfs_root *root);
4482 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4483 struct btrfs_root *root);
4484 int btrfs_recover_relocation(struct btrfs_root *root);
4485 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4486 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4487 struct btrfs_root *root, struct extent_buffer *buf,
4488 struct extent_buffer *cow);
4489 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
4490 u64 *bytes_to_reserve);
4491 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4492 struct btrfs_pending_snapshot *pending);
4495 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4496 u64 end, struct btrfs_scrub_progress *progress,
4497 int readonly, int is_dev_replace);
4498 void btrfs_scrub_pause(struct btrfs_root *root);
4499 void btrfs_scrub_continue(struct btrfs_root *root);
4500 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4501 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4502 struct btrfs_device *dev);
4503 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4504 struct btrfs_scrub_progress *progress);
4507 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4508 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4509 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4511 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4513 btrfs_bio_counter_sub(fs_info, 1);
4517 struct reada_control {
4518 struct btrfs_root *root; /* tree to prefetch */
4519 struct btrfs_key key_start;
4520 struct btrfs_key key_end; /* exclusive */
4523 wait_queue_head_t wait;
4525 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4526 struct btrfs_key *start, struct btrfs_key *end);
4527 int btrfs_reada_wait(void *handle);
4528 void btrfs_reada_detach(void *handle);
4529 int btree_readahead_hook(struct btrfs_fs_info *fs_info,
4530 struct extent_buffer *eb, u64 start, int err);
4532 static inline int is_fstree(u64 rootid)
4534 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4535 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
4536 !btrfs_qgroup_level(rootid)))
4541 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4543 return signal_pending(current);
4546 /* Sanity test specific functions */
4547 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4548 void btrfs_test_destroy_inode(struct inode *inode);
4551 static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4553 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4554 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))