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 "extent_io.h"
39 #include "extent_map.h"
40 #include "async-thread.h"
42 struct btrfs_trans_handle;
43 struct btrfs_transaction;
44 struct btrfs_pending_snapshot;
45 extern struct kmem_cache *btrfs_trans_handle_cachep;
46 extern struct kmem_cache *btrfs_transaction_cachep;
47 extern struct kmem_cache *btrfs_bit_radix_cachep;
48 extern struct kmem_cache *btrfs_path_cachep;
49 extern struct kmem_cache *btrfs_free_space_cachep;
50 struct btrfs_ordered_sum;
52 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
53 #define STATIC noinline
55 #define STATIC static noinline
58 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
60 #define BTRFS_MAX_MIRRORS 3
62 #define BTRFS_MAX_LEVEL 8
64 #define BTRFS_COMPAT_EXTENT_TREE_V0
66 /* holds pointers to all of the tree roots */
67 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
69 /* stores information about which extents are in use, and reference counts */
70 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
73 * chunk tree stores translations from logical -> physical block numbering
74 * the super block points to the chunk tree
76 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
79 * stores information about which areas of a given device are in use.
80 * one per device. The tree of tree roots points to the device tree
82 #define BTRFS_DEV_TREE_OBJECTID 4ULL
84 /* one per subvolume, storing files and directories */
85 #define BTRFS_FS_TREE_OBJECTID 5ULL
87 /* directory objectid inside the root tree */
88 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
90 /* holds checksums of all the data extents */
91 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
93 /* holds quota configuration and tracking */
94 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
96 /* for storing items that use the BTRFS_UUID_KEY* types */
97 #define BTRFS_UUID_TREE_OBJECTID 9ULL
99 /* for storing balance parameters in the root tree */
100 #define BTRFS_BALANCE_OBJECTID -4ULL
102 /* orhpan objectid for tracking unlinked/truncated files */
103 #define BTRFS_ORPHAN_OBJECTID -5ULL
105 /* does write ahead logging to speed up fsyncs */
106 #define BTRFS_TREE_LOG_OBJECTID -6ULL
107 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
109 /* for space balancing */
110 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
111 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
114 * extent checksums all have this objectid
115 * this allows them to share the logging tree
118 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
120 /* For storing free space cache */
121 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
124 * The inode number assigned to the special inode for storing
127 #define BTRFS_FREE_INO_OBJECTID -12ULL
129 /* dummy objectid represents multiple objectids */
130 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
133 * All files have objectids in this range.
135 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
136 #define BTRFS_LAST_FREE_OBJECTID -256ULL
137 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
141 * the device items go into the chunk tree. The key is in the form
142 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
144 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
146 #define BTRFS_BTREE_INODE_OBJECTID 1
148 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
150 #define BTRFS_DEV_REPLACE_DEVID 0ULL
153 * the max metadata block size. This limit is somewhat artificial,
154 * but the memmove costs go through the roof for larger blocks.
156 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
159 * we can actually store much bigger names, but lets not confuse the rest
162 #define BTRFS_NAME_LEN 255
165 * Theoretical limit is larger, but we keep this down to a sane
166 * value. That should limit greatly the possibility of collisions on
169 #define BTRFS_LINK_MAX 65535U
171 /* 32 bytes in various csum fields */
172 #define BTRFS_CSUM_SIZE 32
175 #define BTRFS_CSUM_TYPE_CRC32 0
177 static int btrfs_csum_sizes[] = { 4, 0 };
179 /* four bytes for CRC32 */
180 #define BTRFS_EMPTY_DIR_SIZE 0
182 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
183 #define REQ_GET_READ_MIRRORS (1 << 30)
185 #define BTRFS_FT_UNKNOWN 0
186 #define BTRFS_FT_REG_FILE 1
187 #define BTRFS_FT_DIR 2
188 #define BTRFS_FT_CHRDEV 3
189 #define BTRFS_FT_BLKDEV 4
190 #define BTRFS_FT_FIFO 5
191 #define BTRFS_FT_SOCK 6
192 #define BTRFS_FT_SYMLINK 7
193 #define BTRFS_FT_XATTR 8
194 #define BTRFS_FT_MAX 9
196 /* ioprio of readahead is set to idle */
197 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
199 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
202 * The key defines the order in the tree, and so it also defines (optimal)
205 * objectid corresponds to the inode number.
207 * type tells us things about the object, and is a kind of stream selector.
208 * so for a given inode, keys with type of 1 might refer to the inode data,
209 * type of 2 may point to file data in the btree and type == 3 may point to
212 * offset is the starting byte offset for this key in the stream.
214 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
215 * in cpu native order. Otherwise they are identical and their sizes
216 * should be the same (ie both packed)
218 struct btrfs_disk_key {
222 } __attribute__ ((__packed__));
228 } __attribute__ ((__packed__));
230 struct btrfs_mapping_tree {
231 struct extent_map_tree map_tree;
234 struct btrfs_dev_item {
235 /* the internal btrfs device id */
238 /* size of the device */
244 /* optimal io alignment for this device */
247 /* optimal io width for this device */
250 /* minimal io size for this device */
253 /* type and info about this device */
256 /* expected generation for this device */
260 * starting byte of this partition on the device,
261 * to allow for stripe alignment in the future
265 /* grouping information for allocation decisions */
268 /* seek speed 0-100 where 100 is fastest */
271 /* bandwidth 0-100 where 100 is fastest */
274 /* btrfs generated uuid for this device */
275 u8 uuid[BTRFS_UUID_SIZE];
277 /* uuid of FS who owns this device */
278 u8 fsid[BTRFS_UUID_SIZE];
279 } __attribute__ ((__packed__));
281 struct btrfs_stripe {
284 u8 dev_uuid[BTRFS_UUID_SIZE];
285 } __attribute__ ((__packed__));
288 /* size of this chunk in bytes */
291 /* objectid of the root referencing this chunk */
297 /* optimal io alignment for this chunk */
300 /* optimal io width for this chunk */
303 /* minimal io size for this chunk */
306 /* 2^16 stripes is quite a lot, a second limit is the size of a single
311 /* sub stripes only matter for raid10 */
313 struct btrfs_stripe stripe;
314 /* additional stripes go here */
315 } __attribute__ ((__packed__));
317 #define BTRFS_FREE_SPACE_EXTENT 1
318 #define BTRFS_FREE_SPACE_BITMAP 2
320 struct btrfs_free_space_entry {
324 } __attribute__ ((__packed__));
326 struct btrfs_free_space_header {
327 struct btrfs_disk_key location;
331 } __attribute__ ((__packed__));
333 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
335 BUG_ON(num_stripes == 0);
336 return sizeof(struct btrfs_chunk) +
337 sizeof(struct btrfs_stripe) * (num_stripes - 1);
340 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
341 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
346 #define BTRFS_FS_STATE_ERROR 0
347 #define BTRFS_FS_STATE_REMOUNTING 1
348 #define BTRFS_FS_STATE_TRANS_ABORTED 2
349 #define BTRFS_FS_STATE_DEV_REPLACING 3
351 /* Super block flags */
352 /* Errors detected */
353 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
355 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
356 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
358 #define BTRFS_BACKREF_REV_MAX 256
359 #define BTRFS_BACKREF_REV_SHIFT 56
360 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
361 BTRFS_BACKREF_REV_SHIFT)
363 #define BTRFS_OLD_BACKREF_REV 0
364 #define BTRFS_MIXED_BACKREF_REV 1
367 * every tree block (leaf or node) starts with this header.
369 struct btrfs_header {
370 /* these first four must match the super block */
371 u8 csum[BTRFS_CSUM_SIZE];
372 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
373 __le64 bytenr; /* which block this node is supposed to live in */
376 /* allowed to be different from the super from here on down */
377 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
382 } __attribute__ ((__packed__));
384 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
385 sizeof(struct btrfs_header)) / \
386 sizeof(struct btrfs_key_ptr))
387 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
388 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
389 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
390 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
391 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
392 sizeof(struct btrfs_item) - \
393 BTRFS_FILE_EXTENT_INLINE_DATA_START)
394 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
395 sizeof(struct btrfs_item) -\
396 sizeof(struct btrfs_dir_item))
400 * this is a very generous portion of the super block, giving us
401 * room to translate 14 chunks with 3 stripes each.
403 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
404 #define BTRFS_LABEL_SIZE 256
407 * just in case we somehow lose the roots and are not able to mount,
408 * we store an array of the roots from previous transactions
411 #define BTRFS_NUM_BACKUP_ROOTS 4
412 struct btrfs_root_backup {
414 __le64 tree_root_gen;
417 __le64 chunk_root_gen;
420 __le64 extent_root_gen;
429 __le64 csum_root_gen;
439 u8 extent_root_level;
443 /* future and to align */
445 } __attribute__ ((__packed__));
448 * the super block basically lists the main trees of the FS
449 * it currently lacks any block count etc etc
451 struct btrfs_super_block {
452 u8 csum[BTRFS_CSUM_SIZE];
453 /* the first 4 fields must match struct btrfs_header */
454 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
455 __le64 bytenr; /* this block number */
458 /* allowed to be different from the btrfs_header from here own down */
465 /* this will help find the new super based on the log root */
466 __le64 log_root_transid;
469 __le64 root_dir_objectid;
473 __le32 __unused_leafsize;
475 __le32 sys_chunk_array_size;
476 __le64 chunk_root_generation;
478 __le64 compat_ro_flags;
479 __le64 incompat_flags;
484 struct btrfs_dev_item dev_item;
486 char label[BTRFS_LABEL_SIZE];
488 __le64 cache_generation;
489 __le64 uuid_tree_generation;
491 /* future expansion */
493 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
494 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
495 } __attribute__ ((__packed__));
498 * Compat flags that we support. If any incompat flags are set other than the
499 * ones specified below then we will fail to mount
501 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
502 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
503 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
504 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
506 * some patches floated around with a second compression method
507 * lets save that incompat here for when they do get in
508 * Note we don't actually support it, we're just reserving the
511 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
514 * older kernels tried to do bigger metadata blocks, but the
515 * code was pretty buggy. Lets not let them try anymore.
517 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
519 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
520 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
521 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
522 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
524 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
525 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
526 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
527 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
528 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
529 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
531 #define BTRFS_FEATURE_INCOMPAT_SUPP \
532 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
533 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
534 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
535 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
536 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
537 BTRFS_FEATURE_INCOMPAT_RAID56 | \
538 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
539 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
540 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
542 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
543 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
544 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
547 * A leaf is full of items. offset and size tell us where to find
548 * the item in the leaf (relative to the start of the data area)
551 struct btrfs_disk_key key;
554 } __attribute__ ((__packed__));
557 * leaves have an item area and a data area:
558 * [item0, item1....itemN] [free space] [dataN...data1, data0]
560 * The data is separate from the items to get the keys closer together
564 struct btrfs_header header;
565 struct btrfs_item items[];
566 } __attribute__ ((__packed__));
569 * all non-leaf blocks are nodes, they hold only keys and pointers to
572 struct btrfs_key_ptr {
573 struct btrfs_disk_key key;
576 } __attribute__ ((__packed__));
579 struct btrfs_header header;
580 struct btrfs_key_ptr ptrs[];
581 } __attribute__ ((__packed__));
584 * btrfs_paths remember the path taken from the root down to the leaf.
585 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
586 * to any other levels that are present.
588 * The slots array records the index of the item or block pointer
589 * used while walking the tree.
592 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
593 int slots[BTRFS_MAX_LEVEL];
594 /* if there is real range locking, this locks field will change */
595 int locks[BTRFS_MAX_LEVEL];
597 /* keep some upper locks as we walk down */
601 * set by btrfs_split_item, tells search_slot to keep all locks
602 * and to force calls to keep space in the nodes
604 unsigned int search_for_split:1;
605 unsigned int keep_locks:1;
606 unsigned int skip_locking:1;
607 unsigned int leave_spinning:1;
608 unsigned int search_commit_root:1;
609 unsigned int need_commit_sem:1;
610 unsigned int skip_release_on_error:1;
614 * items in the extent btree are used to record the objectid of the
615 * owner of the block and the number of references
618 struct btrfs_extent_item {
622 } __attribute__ ((__packed__));
624 struct btrfs_extent_item_v0 {
626 } __attribute__ ((__packed__));
628 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
629 sizeof(struct btrfs_item))
631 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
632 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
634 /* following flags only apply to tree blocks */
636 /* use full backrefs for extent pointers in the block */
637 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
640 * this flag is only used internally by scrub and may be changed at any time
641 * it is only declared here to avoid collisions
643 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
645 struct btrfs_tree_block_info {
646 struct btrfs_disk_key key;
648 } __attribute__ ((__packed__));
650 struct btrfs_extent_data_ref {
655 } __attribute__ ((__packed__));
657 struct btrfs_shared_data_ref {
659 } __attribute__ ((__packed__));
661 struct btrfs_extent_inline_ref {
664 } __attribute__ ((__packed__));
666 /* old style backrefs item */
667 struct btrfs_extent_ref_v0 {
672 } __attribute__ ((__packed__));
675 /* dev extents record free space on individual devices. The owner
676 * field points back to the chunk allocation mapping tree that allocated
677 * the extent. The chunk tree uuid field is a way to double check the owner
679 struct btrfs_dev_extent {
681 __le64 chunk_objectid;
684 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
685 } __attribute__ ((__packed__));
687 struct btrfs_inode_ref {
691 } __attribute__ ((__packed__));
693 struct btrfs_inode_extref {
694 __le64 parent_objectid;
699 } __attribute__ ((__packed__));
701 struct btrfs_timespec {
704 } __attribute__ ((__packed__));
706 enum btrfs_compression_type {
707 BTRFS_COMPRESS_NONE = 0,
708 BTRFS_COMPRESS_ZLIB = 1,
709 BTRFS_COMPRESS_LZO = 2,
710 BTRFS_COMPRESS_TYPES = 2,
711 BTRFS_COMPRESS_LAST = 3,
714 struct btrfs_inode_item {
715 /* nfs style generation number */
717 /* transid that last touched this inode */
729 /* modification sequence number for NFS */
733 * a little future expansion, for more than this we can
734 * just grow the inode item and version it
737 struct btrfs_timespec atime;
738 struct btrfs_timespec ctime;
739 struct btrfs_timespec mtime;
740 struct btrfs_timespec otime;
741 } __attribute__ ((__packed__));
743 struct btrfs_dir_log_item {
745 } __attribute__ ((__packed__));
747 struct btrfs_dir_item {
748 struct btrfs_disk_key location;
753 } __attribute__ ((__packed__));
755 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
758 * Internal in-memory flag that a subvolume has been marked for deletion but
759 * still visible as a directory
761 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
763 struct btrfs_root_item {
764 struct btrfs_inode_item inode;
770 __le64 last_snapshot;
773 struct btrfs_disk_key drop_progress;
778 * The following fields appear after subvol_uuids+subvol_times
783 * This generation number is used to test if the new fields are valid
784 * and up to date while reading the root item. Everytime the root item
785 * is written out, the "generation" field is copied into this field. If
786 * anyone ever mounted the fs with an older kernel, we will have
787 * mismatching generation values here and thus must invalidate the
788 * new fields. See btrfs_update_root and btrfs_find_last_root for
790 * the offset of generation_v2 is also used as the start for the memset
791 * when invalidating the fields.
793 __le64 generation_v2;
794 u8 uuid[BTRFS_UUID_SIZE];
795 u8 parent_uuid[BTRFS_UUID_SIZE];
796 u8 received_uuid[BTRFS_UUID_SIZE];
797 __le64 ctransid; /* updated when an inode changes */
798 __le64 otransid; /* trans when created */
799 __le64 stransid; /* trans when sent. non-zero for received subvol */
800 __le64 rtransid; /* trans when received. non-zero for received subvol */
801 struct btrfs_timespec ctime;
802 struct btrfs_timespec otime;
803 struct btrfs_timespec stime;
804 struct btrfs_timespec rtime;
805 __le64 reserved[8]; /* for future */
806 } __attribute__ ((__packed__));
809 * this is used for both forward and backward root refs
811 struct btrfs_root_ref {
815 } __attribute__ ((__packed__));
817 struct btrfs_disk_balance_args {
819 * profiles to operate on, single is denoted by
820 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
830 /* devid subset filter [pstart..pend) */
834 /* btrfs virtual address space subset filter [vstart..vend) */
839 * profile to convert to, single is denoted by
840 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
844 /* BTRFS_BALANCE_ARGS_* */
847 /* BTRFS_BALANCE_ARGS_LIMIT value */
851 } __attribute__ ((__packed__));
854 * store balance parameters to disk so that balance can be properly
855 * resumed after crash or unmount
857 struct btrfs_balance_item {
858 /* BTRFS_BALANCE_* */
861 struct btrfs_disk_balance_args data;
862 struct btrfs_disk_balance_args meta;
863 struct btrfs_disk_balance_args sys;
866 } __attribute__ ((__packed__));
868 #define BTRFS_FILE_EXTENT_INLINE 0
869 #define BTRFS_FILE_EXTENT_REG 1
870 #define BTRFS_FILE_EXTENT_PREALLOC 2
872 struct btrfs_file_extent_item {
874 * transaction id that created this extent
878 * max number of bytes to hold this extent in ram
879 * when we split a compressed extent we can't know how big
880 * each of the resulting pieces will be. So, this is
881 * an upper limit on the size of the extent in ram instead of
887 * 32 bits for the various ways we might encode the data,
888 * including compression and encryption. If any of these
889 * are set to something a given disk format doesn't understand
890 * it is treated like an incompat flag for reading and writing,
895 __le16 other_encoding; /* spare for later use */
897 /* are we inline data or a real extent? */
901 * disk space consumed by the extent, checksum blocks are included
904 * At this offset in the structure, the inline extent data start.
907 __le64 disk_num_bytes;
909 * the logical offset in file blocks (no csums)
910 * this extent record is for. This allows a file extent to point
911 * into the middle of an existing extent on disk, sharing it
912 * between two snapshots (useful if some bytes in the middle of the
913 * extent have changed
917 * the logical number of file blocks (no csums included). This
918 * always reflects the size uncompressed and without encoding.
922 } __attribute__ ((__packed__));
924 struct btrfs_csum_item {
926 } __attribute__ ((__packed__));
928 struct btrfs_dev_stats_item {
930 * grow this item struct at the end for future enhancements and keep
931 * the existing values unchanged
933 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
934 } __attribute__ ((__packed__));
936 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
937 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
938 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
939 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
940 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
941 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
942 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
944 struct btrfs_dev_replace {
945 u64 replace_state; /* see #define above */
946 u64 time_started; /* seconds since 1-Jan-1970 */
947 u64 time_stopped; /* seconds since 1-Jan-1970 */
948 atomic64_t num_write_errors;
949 atomic64_t num_uncorrectable_read_errors;
952 u64 committed_cursor_left;
953 u64 cursor_left_last_write_of_item;
956 u64 cont_reading_from_srcdev_mode; /* see #define above */
959 int item_needs_writeback;
960 struct btrfs_device *srcdev;
961 struct btrfs_device *tgtdev;
964 atomic_t nesting_level;
965 struct mutex lock_finishing_cancel_unmount;
966 struct mutex lock_management_lock;
969 struct btrfs_scrub_progress scrub_progress;
972 struct btrfs_dev_replace_item {
974 * grow this item struct at the end for future enhancements and keep
975 * the existing values unchanged
980 __le64 cont_reading_from_srcdev_mode;
982 __le64 replace_state;
985 __le64 num_write_errors;
986 __le64 num_uncorrectable_read_errors;
987 } __attribute__ ((__packed__));
989 /* different types of block groups (and chunks) */
990 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
991 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
992 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
993 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
994 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
995 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
996 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
997 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
998 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
999 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1000 BTRFS_SPACE_INFO_GLOBAL_RSV)
1002 enum btrfs_raid_types {
1013 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1014 BTRFS_BLOCK_GROUP_SYSTEM | \
1015 BTRFS_BLOCK_GROUP_METADATA)
1017 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1018 BTRFS_BLOCK_GROUP_RAID1 | \
1019 BTRFS_BLOCK_GROUP_RAID5 | \
1020 BTRFS_BLOCK_GROUP_RAID6 | \
1021 BTRFS_BLOCK_GROUP_DUP | \
1022 BTRFS_BLOCK_GROUP_RAID10)
1024 * We need a bit for restriper to be able to tell when chunks of type
1025 * SINGLE are available. This "extended" profile format is used in
1026 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1027 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1028 * to avoid remappings between two formats in future.
1030 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1033 * A fake block group type that is used to communicate global block reserve
1034 * size to userspace via the SPACE_INFO ioctl.
1036 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1038 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1039 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1041 static inline u64 chunk_to_extended(u64 flags)
1043 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1044 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1048 static inline u64 extended_to_chunk(u64 flags)
1050 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1053 struct btrfs_block_group_item {
1055 __le64 chunk_objectid;
1057 } __attribute__ ((__packed__));
1060 * is subvolume quota turned on?
1062 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1064 * RESCAN is set during the initialization phase
1066 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1068 * Some qgroup entries are known to be out of date,
1069 * either because the configuration has changed in a way that
1070 * makes a rescan necessary, or because the fs has been mounted
1071 * with a non-qgroup-aware version.
1072 * Turning qouta off and on again makes it inconsistent, too.
1074 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1076 #define BTRFS_QGROUP_STATUS_VERSION 1
1078 struct btrfs_qgroup_status_item {
1081 * the generation is updated during every commit. As older
1082 * versions of btrfs are not aware of qgroups, it will be
1083 * possible to detect inconsistencies by checking the
1084 * generation on mount time
1088 /* flag definitions see above */
1092 * only used during scanning to record the progress
1093 * of the scan. It contains a logical address
1096 } __attribute__ ((__packed__));
1098 struct btrfs_qgroup_info_item {
1104 } __attribute__ ((__packed__));
1106 /* flags definition for qgroup limits */
1107 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1108 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1109 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1110 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1111 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1112 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1114 struct btrfs_qgroup_limit_item {
1116 * only updated when any of the other values change
1123 } __attribute__ ((__packed__));
1125 /* For raid type sysfs entries */
1126 struct raid_kobject {
1128 struct kobject kobj;
1131 struct btrfs_space_info {
1134 u64 total_bytes; /* total bytes in the space,
1135 this doesn't take mirrors into account */
1136 u64 bytes_used; /* total bytes used,
1137 this doesn't take mirrors into account */
1138 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1139 transaction finishes */
1140 u64 bytes_reserved; /* total bytes the allocator has reserved for
1141 current allocations */
1142 u64 bytes_may_use; /* number of bytes that may be used for
1143 delalloc/allocations */
1144 u64 bytes_readonly; /* total bytes that are read only */
1146 unsigned int full:1; /* indicates that we cannot allocate any more
1147 chunks for this space */
1148 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1150 unsigned int flush:1; /* set if we are trying to make space */
1152 unsigned int force_alloc; /* set if we need to force a chunk
1153 alloc for this space */
1155 u64 disk_used; /* total bytes used on disk */
1156 u64 disk_total; /* total bytes on disk, takes mirrors into
1162 * bytes_pinned is kept in line with what is actually pinned, as in
1163 * we've called update_block_group and dropped the bytes_used counter
1164 * and increased the bytes_pinned counter. However this means that
1165 * bytes_pinned does not reflect the bytes that will be pinned once the
1166 * delayed refs are flushed, so this counter is inc'ed everytime we call
1167 * btrfs_free_extent so it is a realtime count of what will be freed
1168 * once the transaction is committed. It will be zero'ed everytime the
1169 * transaction commits.
1171 struct percpu_counter total_bytes_pinned;
1173 struct list_head list;
1174 struct list_head ro_bgs;
1176 struct rw_semaphore groups_sem;
1177 /* for block groups in our same type */
1178 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1179 wait_queue_head_t wait;
1181 struct kobject kobj;
1182 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1185 #define BTRFS_BLOCK_RSV_GLOBAL 1
1186 #define BTRFS_BLOCK_RSV_DELALLOC 2
1187 #define BTRFS_BLOCK_RSV_TRANS 3
1188 #define BTRFS_BLOCK_RSV_CHUNK 4
1189 #define BTRFS_BLOCK_RSV_DELOPS 5
1190 #define BTRFS_BLOCK_RSV_EMPTY 6
1191 #define BTRFS_BLOCK_RSV_TEMP 7
1193 struct btrfs_block_rsv {
1196 struct btrfs_space_info *space_info;
1198 unsigned short full;
1199 unsigned short type;
1200 unsigned short failfast;
1204 * free clusters are used to claim free space in relatively large chunks,
1205 * allowing us to do less seeky writes. They are used for all metadata
1206 * allocations and data allocations in ssd mode.
1208 struct btrfs_free_cluster {
1210 spinlock_t refill_lock;
1211 struct rb_root root;
1213 /* largest extent in this cluster */
1216 /* first extent starting offset */
1219 struct btrfs_block_group_cache *block_group;
1221 * when a cluster is allocated from a block group, we put the
1222 * cluster onto a list in the block group so that it can
1223 * be freed before the block group is freed.
1225 struct list_head block_group_list;
1228 enum btrfs_caching_type {
1230 BTRFS_CACHE_STARTED = 1,
1231 BTRFS_CACHE_FAST = 2,
1232 BTRFS_CACHE_FINISHED = 3,
1233 BTRFS_CACHE_ERROR = 4,
1236 enum btrfs_disk_cache_state {
1237 BTRFS_DC_WRITTEN = 0,
1241 BTRFS_DC_NEED_WRITE = 4,
1244 struct btrfs_caching_control {
1245 struct list_head list;
1247 wait_queue_head_t wait;
1248 struct btrfs_work work;
1249 struct btrfs_block_group_cache *block_group;
1254 struct btrfs_block_group_cache {
1255 struct btrfs_key key;
1256 struct btrfs_block_group_item item;
1257 struct btrfs_fs_info *fs_info;
1258 struct inode *inode;
1266 u64 cache_generation;
1269 * It is just used for the delayed data space allocation because
1270 * only the data space allocation and the relative metadata update
1271 * can be done cross the transaction.
1273 struct rw_semaphore data_rwsem;
1275 /* for raid56, this is a full stripe, without parity */
1276 unsigned long full_stripe_len;
1279 unsigned int dirty:1;
1280 unsigned int iref:1;
1281 unsigned int has_caching_ctl:1;
1282 unsigned int removed:1;
1284 int disk_cache_state;
1286 /* cache tracking stuff */
1288 struct btrfs_caching_control *caching_ctl;
1289 u64 last_byte_to_unpin;
1291 struct btrfs_space_info *space_info;
1293 /* free space cache stuff */
1294 struct btrfs_free_space_ctl *free_space_ctl;
1296 /* block group cache stuff */
1297 struct rb_node cache_node;
1299 /* for block groups in the same raid type */
1300 struct list_head list;
1305 /* List of struct btrfs_free_clusters for this block group.
1306 * Today it will only have one thing on it, but that may change
1308 struct list_head cluster_list;
1310 /* For delayed block group creation or deletion of empty block groups */
1311 struct list_head bg_list;
1313 /* For read-only block groups */
1314 struct list_head ro_list;
1319 /* delayed seq elem */
1321 struct list_head list;
1325 enum btrfs_orphan_cleanup_state {
1326 ORPHAN_CLEANUP_STARTED = 1,
1327 ORPHAN_CLEANUP_DONE = 2,
1330 /* used by the raid56 code to lock stripes for read/modify/write */
1331 struct btrfs_stripe_hash {
1332 struct list_head hash_list;
1333 wait_queue_head_t wait;
1337 /* used by the raid56 code to lock stripes for read/modify/write */
1338 struct btrfs_stripe_hash_table {
1339 struct list_head stripe_cache;
1340 spinlock_t cache_lock;
1342 struct btrfs_stripe_hash table[];
1345 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1347 void btrfs_init_async_reclaim_work(struct work_struct *work);
1350 struct reloc_control;
1351 struct btrfs_device;
1352 struct btrfs_fs_devices;
1353 struct btrfs_balance_control;
1354 struct btrfs_delayed_root;
1355 struct btrfs_fs_info {
1356 u8 fsid[BTRFS_FSID_SIZE];
1357 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1358 struct btrfs_root *extent_root;
1359 struct btrfs_root *tree_root;
1360 struct btrfs_root *chunk_root;
1361 struct btrfs_root *dev_root;
1362 struct btrfs_root *fs_root;
1363 struct btrfs_root *csum_root;
1364 struct btrfs_root *quota_root;
1365 struct btrfs_root *uuid_root;
1367 /* the log root tree is a directory of all the other log roots */
1368 struct btrfs_root *log_root_tree;
1370 spinlock_t fs_roots_radix_lock;
1371 struct radix_tree_root fs_roots_radix;
1373 /* block group cache stuff */
1374 spinlock_t block_group_cache_lock;
1375 u64 first_logical_byte;
1376 struct rb_root block_group_cache_tree;
1378 /* keep track of unallocated space */
1379 spinlock_t free_chunk_lock;
1380 u64 free_chunk_space;
1382 struct extent_io_tree freed_extents[2];
1383 struct extent_io_tree *pinned_extents;
1385 /* logical->physical extent mapping */
1386 struct btrfs_mapping_tree mapping_tree;
1389 * block reservation for extent, checksum, root tree and
1390 * delayed dir index item
1392 struct btrfs_block_rsv global_block_rsv;
1393 /* block reservation for delay allocation */
1394 struct btrfs_block_rsv delalloc_block_rsv;
1395 /* block reservation for metadata operations */
1396 struct btrfs_block_rsv trans_block_rsv;
1397 /* block reservation for chunk tree */
1398 struct btrfs_block_rsv chunk_block_rsv;
1399 /* block reservation for delayed operations */
1400 struct btrfs_block_rsv delayed_block_rsv;
1402 struct btrfs_block_rsv empty_block_rsv;
1405 u64 last_trans_committed;
1406 u64 avg_delayed_ref_runtime;
1409 * this is updated to the current trans every time a full commit
1410 * is required instead of the faster short fsync log commits
1412 u64 last_trans_log_full_commit;
1413 unsigned long mount_opt;
1415 * Track requests for actions that need to be done during transaction
1416 * commit (like for some mount options).
1418 unsigned long pending_changes;
1419 unsigned long compress_type:4;
1420 int commit_interval;
1422 * It is a suggestive number, the read side is safe even it gets a
1423 * wrong number because we will write out the data into a regular
1424 * extent. The write side(mount/remount) is under ->s_umount lock,
1425 * so it is also safe.
1429 * Protected by ->chunk_mutex and sb->s_umount.
1431 * The reason that we use two lock to protect it is because only
1432 * remount and mount operations can change it and these two operations
1433 * are under sb->s_umount, but the read side (chunk allocation) can not
1434 * acquire sb->s_umount or the deadlock would happen. So we use two
1435 * locks to protect it. On the write side, we must acquire two locks,
1436 * and on the read side, we just need acquire one of them.
1439 struct btrfs_transaction *running_transaction;
1440 wait_queue_head_t transaction_throttle;
1441 wait_queue_head_t transaction_wait;
1442 wait_queue_head_t transaction_blocked_wait;
1443 wait_queue_head_t async_submit_wait;
1446 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1447 * when they are updated.
1449 * Because we do not clear the flags for ever, so we needn't use
1450 * the lock on the read side.
1452 * We also needn't use the lock when we mount the fs, because
1453 * there is no other task which will update the flag.
1455 spinlock_t super_lock;
1456 struct btrfs_super_block *super_copy;
1457 struct btrfs_super_block *super_for_commit;
1458 struct block_device *__bdev;
1459 struct super_block *sb;
1460 struct inode *btree_inode;
1461 struct backing_dev_info bdi;
1462 struct mutex tree_log_mutex;
1463 struct mutex transaction_kthread_mutex;
1464 struct mutex cleaner_mutex;
1465 struct mutex chunk_mutex;
1466 struct mutex volume_mutex;
1468 /* this is used during read/modify/write to make sure
1469 * no two ios are trying to mod the same stripe at the same
1472 struct btrfs_stripe_hash_table *stripe_hash_table;
1475 * this protects the ordered operations list only while we are
1476 * processing all of the entries on it. This way we make
1477 * sure the commit code doesn't find the list temporarily empty
1478 * because another function happens to be doing non-waiting preflush
1479 * before jumping into the main commit.
1481 struct mutex ordered_operations_mutex;
1484 * Same as ordered_operations_mutex except this is for ordered extents
1485 * and not the operations.
1487 struct mutex ordered_extent_flush_mutex;
1489 struct rw_semaphore commit_root_sem;
1491 struct rw_semaphore cleanup_work_sem;
1493 struct rw_semaphore subvol_sem;
1494 struct srcu_struct subvol_srcu;
1496 spinlock_t trans_lock;
1498 * the reloc mutex goes with the trans lock, it is taken
1499 * during commit to protect us from the relocation code
1501 struct mutex reloc_mutex;
1503 struct list_head trans_list;
1504 struct list_head dead_roots;
1505 struct list_head caching_block_groups;
1507 spinlock_t delayed_iput_lock;
1508 struct list_head delayed_iputs;
1510 /* this protects tree_mod_seq_list */
1511 spinlock_t tree_mod_seq_lock;
1512 atomic64_t tree_mod_seq;
1513 struct list_head tree_mod_seq_list;
1515 /* this protects tree_mod_log */
1516 rwlock_t tree_mod_log_lock;
1517 struct rb_root tree_mod_log;
1519 atomic_t nr_async_submits;
1520 atomic_t async_submit_draining;
1521 atomic_t nr_async_bios;
1522 atomic_t async_delalloc_pages;
1523 atomic_t open_ioctl_trans;
1526 * this is used to protect the following list -- ordered_roots.
1528 spinlock_t ordered_root_lock;
1531 * all fs/file tree roots in which there are data=ordered extents
1532 * pending writeback are added into this list.
1534 * these can span multiple transactions and basically include
1535 * every dirty data page that isn't from nodatacow
1537 struct list_head ordered_roots;
1539 struct mutex delalloc_root_mutex;
1540 spinlock_t delalloc_root_lock;
1541 /* all fs/file tree roots that have delalloc inodes. */
1542 struct list_head delalloc_roots;
1545 * there is a pool of worker threads for checksumming during writes
1546 * and a pool for checksumming after reads. This is because readers
1547 * can run with FS locks held, and the writers may be waiting for
1548 * those locks. We don't want ordering in the pending list to cause
1549 * deadlocks, and so the two are serviced separately.
1551 * A third pool does submit_bio to avoid deadlocking with the other
1554 struct btrfs_workqueue *workers;
1555 struct btrfs_workqueue *delalloc_workers;
1556 struct btrfs_workqueue *flush_workers;
1557 struct btrfs_workqueue *endio_workers;
1558 struct btrfs_workqueue *endio_meta_workers;
1559 struct btrfs_workqueue *endio_raid56_workers;
1560 struct btrfs_workqueue *endio_repair_workers;
1561 struct btrfs_workqueue *rmw_workers;
1562 struct btrfs_workqueue *endio_meta_write_workers;
1563 struct btrfs_workqueue *endio_write_workers;
1564 struct btrfs_workqueue *endio_freespace_worker;
1565 struct btrfs_workqueue *submit_workers;
1566 struct btrfs_workqueue *caching_workers;
1567 struct btrfs_workqueue *readahead_workers;
1570 * fixup workers take dirty pages that didn't properly go through
1571 * the cow mechanism and make them safe to write. It happens
1572 * for the sys_munmap function call path
1574 struct btrfs_workqueue *fixup_workers;
1575 struct btrfs_workqueue *delayed_workers;
1577 /* the extent workers do delayed refs on the extent allocation tree */
1578 struct btrfs_workqueue *extent_workers;
1579 struct task_struct *transaction_kthread;
1580 struct task_struct *cleaner_kthread;
1581 int thread_pool_size;
1583 struct kobject super_kobj;
1584 struct kobject *space_info_kobj;
1585 struct kobject *device_dir_kobj;
1586 struct completion kobj_unregister;
1589 int log_root_recovering;
1594 /* used to keep from writing metadata until there is a nice batch */
1595 struct percpu_counter dirty_metadata_bytes;
1596 struct percpu_counter delalloc_bytes;
1597 s32 dirty_metadata_batch;
1600 struct list_head dirty_cowonly_roots;
1602 struct btrfs_fs_devices *fs_devices;
1605 * the space_info list is almost entirely read only. It only changes
1606 * when we add a new raid type to the FS, and that happens
1607 * very rarely. RCU is used to protect it.
1609 struct list_head space_info;
1611 struct btrfs_space_info *data_sinfo;
1613 struct reloc_control *reloc_ctl;
1615 /* data_alloc_cluster is only used in ssd mode */
1616 struct btrfs_free_cluster data_alloc_cluster;
1618 /* all metadata allocations go through this cluster */
1619 struct btrfs_free_cluster meta_alloc_cluster;
1621 /* auto defrag inodes go here */
1622 spinlock_t defrag_inodes_lock;
1623 struct rb_root defrag_inodes;
1624 atomic_t defrag_running;
1626 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1627 seqlock_t profiles_lock;
1629 * these three are in extended format (availability of single
1630 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1631 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1633 u64 avail_data_alloc_bits;
1634 u64 avail_metadata_alloc_bits;
1635 u64 avail_system_alloc_bits;
1637 /* restriper state */
1638 spinlock_t balance_lock;
1639 struct mutex balance_mutex;
1640 atomic_t balance_running;
1641 atomic_t balance_pause_req;
1642 atomic_t balance_cancel_req;
1643 struct btrfs_balance_control *balance_ctl;
1644 wait_queue_head_t balance_wait_q;
1646 unsigned data_chunk_allocations;
1647 unsigned metadata_ratio;
1651 /* private scrub information */
1652 struct mutex scrub_lock;
1653 atomic_t scrubs_running;
1654 atomic_t scrub_pause_req;
1655 atomic_t scrubs_paused;
1656 atomic_t scrub_cancel_req;
1657 wait_queue_head_t scrub_pause_wait;
1658 int scrub_workers_refcnt;
1659 struct btrfs_workqueue *scrub_workers;
1660 struct btrfs_workqueue *scrub_wr_completion_workers;
1661 struct btrfs_workqueue *scrub_nocow_workers;
1663 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1664 u32 check_integrity_print_mask;
1669 unsigned int quota_enabled:1;
1672 * quota_enabled only changes state after a commit. This holds the
1675 unsigned int pending_quota_state:1;
1677 /* is qgroup tracking in a consistent state? */
1680 /* holds configuration and tracking. Protected by qgroup_lock */
1681 struct rb_root qgroup_tree;
1682 struct rb_root qgroup_op_tree;
1683 spinlock_t qgroup_lock;
1684 spinlock_t qgroup_op_lock;
1685 atomic_t qgroup_op_seq;
1688 * used to avoid frequently calling ulist_alloc()/ulist_free()
1689 * when doing qgroup accounting, it must be protected by qgroup_lock.
1691 struct ulist *qgroup_ulist;
1693 /* protect user change for quota operations */
1694 struct mutex qgroup_ioctl_lock;
1696 /* list of dirty qgroups to be written at next commit */
1697 struct list_head dirty_qgroups;
1699 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1702 /* qgroup rescan items */
1703 struct mutex qgroup_rescan_lock; /* protects the progress item */
1704 struct btrfs_key qgroup_rescan_progress;
1705 struct btrfs_workqueue *qgroup_rescan_workers;
1706 struct completion qgroup_rescan_completion;
1707 struct btrfs_work qgroup_rescan_work;
1709 /* filesystem state */
1710 unsigned long fs_state;
1712 struct btrfs_delayed_root *delayed_root;
1714 /* readahead tree */
1715 spinlock_t reada_lock;
1716 struct radix_tree_root reada_tree;
1718 /* Extent buffer radix tree */
1719 spinlock_t buffer_lock;
1720 struct radix_tree_root buffer_radix;
1722 /* next backup root to be overwritten */
1723 int backup_root_index;
1725 int num_tolerated_disk_barrier_failures;
1727 /* device replace state */
1728 struct btrfs_dev_replace dev_replace;
1730 atomic_t mutually_exclusive_operation_running;
1732 struct percpu_counter bio_counter;
1733 wait_queue_head_t replace_wait;
1735 struct semaphore uuid_tree_rescan_sem;
1736 unsigned int update_uuid_tree_gen:1;
1738 /* Used to reclaim the metadata space in the background. */
1739 struct work_struct async_reclaim_work;
1741 spinlock_t unused_bgs_lock;
1742 struct list_head unused_bgs;
1744 /* For btrfs to record security options */
1745 struct security_mnt_opts security_opts;
1748 * Chunks that can't be freed yet (under a trim/discard operation)
1749 * and will be latter freed. Protected by fs_info->chunk_mutex.
1751 struct list_head pinned_chunks;
1754 struct btrfs_subvolume_writers {
1755 struct percpu_counter counter;
1756 wait_queue_head_t wait;
1760 * The state of btrfs root
1763 * btrfs_record_root_in_trans is a multi-step process,
1764 * and it can race with the balancing code. But the
1765 * race is very small, and only the first time the root
1766 * is added to each transaction. So IN_TRANS_SETUP
1767 * is used to tell us when more checks are required
1769 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1770 #define BTRFS_ROOT_REF_COWS 1
1771 #define BTRFS_ROOT_TRACK_DIRTY 2
1772 #define BTRFS_ROOT_IN_RADIX 3
1773 #define BTRFS_ROOT_DUMMY_ROOT 4
1774 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1775 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1776 #define BTRFS_ROOT_FORCE_COW 7
1777 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1780 * in ram representation of the tree. extent_root is used for all allocations
1781 * and for the extent tree extent_root root.
1784 struct extent_buffer *node;
1786 struct extent_buffer *commit_root;
1787 struct btrfs_root *log_root;
1788 struct btrfs_root *reloc_root;
1790 unsigned long state;
1791 struct btrfs_root_item root_item;
1792 struct btrfs_key root_key;
1793 struct btrfs_fs_info *fs_info;
1794 struct extent_io_tree dirty_log_pages;
1796 struct kobject root_kobj;
1797 struct completion kobj_unregister;
1798 struct mutex objectid_mutex;
1800 spinlock_t accounting_lock;
1801 struct btrfs_block_rsv *block_rsv;
1803 /* free ino cache stuff */
1804 struct btrfs_free_space_ctl *free_ino_ctl;
1805 enum btrfs_caching_type ino_cache_state;
1806 spinlock_t ino_cache_lock;
1807 wait_queue_head_t ino_cache_wait;
1808 struct btrfs_free_space_ctl *free_ino_pinned;
1809 u64 ino_cache_progress;
1810 struct inode *ino_cache_inode;
1812 struct mutex log_mutex;
1813 wait_queue_head_t log_writer_wait;
1814 wait_queue_head_t log_commit_wait[2];
1815 struct list_head log_ctxs[2];
1816 atomic_t log_writers;
1817 atomic_t log_commit[2];
1820 /* No matter the commit succeeds or not*/
1821 int log_transid_committed;
1822 /* Just be updated when the commit succeeds. */
1823 int last_log_commit;
1824 pid_t log_start_pid;
1829 /* data allocations are done in sectorsize units */
1832 /* node allocations are done in nodesize units */
1839 u64 highest_objectid;
1841 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1844 u64 defrag_trans_start;
1845 struct btrfs_key defrag_progress;
1846 struct btrfs_key defrag_max;
1849 /* the dirty list is only used by non-reference counted roots */
1850 struct list_head dirty_list;
1852 struct list_head root_list;
1854 spinlock_t log_extents_lock[2];
1855 struct list_head logged_list[2];
1857 spinlock_t orphan_lock;
1858 atomic_t orphan_inodes;
1859 struct btrfs_block_rsv *orphan_block_rsv;
1860 int orphan_cleanup_state;
1862 spinlock_t inode_lock;
1863 /* red-black tree that keeps track of in-memory inodes */
1864 struct rb_root inode_tree;
1867 * radix tree that keeps track of delayed nodes of every inode,
1868 * protected by inode_lock
1870 struct radix_tree_root delayed_nodes_tree;
1872 * right now this just gets used so that a root has its own devid
1873 * for stat. It may be used for more later
1877 spinlock_t root_item_lock;
1880 struct mutex delalloc_mutex;
1881 spinlock_t delalloc_lock;
1883 * all of the inodes that have delalloc bytes. It is possible for
1884 * this list to be empty even when there is still dirty data=ordered
1885 * extents waiting to finish IO.
1887 struct list_head delalloc_inodes;
1888 struct list_head delalloc_root;
1889 u64 nr_delalloc_inodes;
1891 struct mutex ordered_extent_mutex;
1893 * this is used by the balancing code to wait for all the pending
1896 spinlock_t ordered_extent_lock;
1899 * all of the data=ordered extents pending writeback
1900 * these can span multiple transactions and basically include
1901 * every dirty data page that isn't from nodatacow
1903 struct list_head ordered_extents;
1904 struct list_head ordered_root;
1905 u64 nr_ordered_extents;
1908 * Number of currently running SEND ioctls to prevent
1909 * manipulation with the read-only status via SUBVOL_SETFLAGS
1911 int send_in_progress;
1912 struct btrfs_subvolume_writers *subv_writers;
1913 atomic_t will_be_snapshoted;
1916 struct btrfs_ioctl_defrag_range_args {
1917 /* start of the defrag operation */
1920 /* number of bytes to defrag, use (u64)-1 to say all */
1924 * flags for the operation, which can include turning
1925 * on compression for this one defrag
1930 * any extent bigger than this will be considered
1931 * already defragged. Use 0 to take the kernel default
1932 * Use 1 to say every single extent must be rewritten
1934 __u32 extent_thresh;
1937 * which compression method to use if turning on compression
1938 * for this defrag operation. If unspecified, zlib will
1941 __u32 compress_type;
1943 /* spare for later */
1949 * inode items have the data typically returned from stat and store other
1950 * info about object characteristics. There is one for every file and dir in
1953 #define BTRFS_INODE_ITEM_KEY 1
1954 #define BTRFS_INODE_REF_KEY 12
1955 #define BTRFS_INODE_EXTREF_KEY 13
1956 #define BTRFS_XATTR_ITEM_KEY 24
1957 #define BTRFS_ORPHAN_ITEM_KEY 48
1958 /* reserve 2-15 close to the inode for later flexibility */
1961 * dir items are the name -> inode pointers in a directory. There is one
1962 * for every name in a directory.
1964 #define BTRFS_DIR_LOG_ITEM_KEY 60
1965 #define BTRFS_DIR_LOG_INDEX_KEY 72
1966 #define BTRFS_DIR_ITEM_KEY 84
1967 #define BTRFS_DIR_INDEX_KEY 96
1969 * extent data is for file data
1971 #define BTRFS_EXTENT_DATA_KEY 108
1974 * extent csums are stored in a separate tree and hold csums for
1975 * an entire extent on disk.
1977 #define BTRFS_EXTENT_CSUM_KEY 128
1980 * root items point to tree roots. They are typically in the root
1981 * tree used by the super block to find all the other trees
1983 #define BTRFS_ROOT_ITEM_KEY 132
1986 * root backrefs tie subvols and snapshots to the directory entries that
1989 #define BTRFS_ROOT_BACKREF_KEY 144
1992 * root refs make a fast index for listing all of the snapshots and
1993 * subvolumes referenced by a given root. They point directly to the
1994 * directory item in the root that references the subvol
1996 #define BTRFS_ROOT_REF_KEY 156
1999 * extent items are in the extent map tree. These record which blocks
2000 * are used, and how many references there are to each block
2002 #define BTRFS_EXTENT_ITEM_KEY 168
2005 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2006 * the length, so we save the level in key->offset instead of the length.
2008 #define BTRFS_METADATA_ITEM_KEY 169
2010 #define BTRFS_TREE_BLOCK_REF_KEY 176
2012 #define BTRFS_EXTENT_DATA_REF_KEY 178
2014 #define BTRFS_EXTENT_REF_V0_KEY 180
2016 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2018 #define BTRFS_SHARED_DATA_REF_KEY 184
2021 * block groups give us hints into the extent allocation trees. Which
2022 * blocks are free etc etc
2024 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2026 #define BTRFS_DEV_EXTENT_KEY 204
2027 #define BTRFS_DEV_ITEM_KEY 216
2028 #define BTRFS_CHUNK_ITEM_KEY 228
2031 * Records the overall state of the qgroups.
2032 * There's only one instance of this key present,
2033 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2035 #define BTRFS_QGROUP_STATUS_KEY 240
2037 * Records the currently used space of the qgroup.
2038 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2040 #define BTRFS_QGROUP_INFO_KEY 242
2042 * Contains the user configured limits for the qgroup.
2043 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2045 #define BTRFS_QGROUP_LIMIT_KEY 244
2047 * Records the child-parent relationship of qgroups. For
2048 * each relation, 2 keys are present:
2049 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2050 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2052 #define BTRFS_QGROUP_RELATION_KEY 246
2054 #define BTRFS_BALANCE_ITEM_KEY 248
2057 * Persistantly stores the io stats in the device tree.
2058 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2060 #define BTRFS_DEV_STATS_KEY 249
2063 * Persistantly stores the device replace state in the device tree.
2064 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2066 #define BTRFS_DEV_REPLACE_KEY 250
2069 * Stores items that allow to quickly map UUIDs to something else.
2070 * These items are part of the filesystem UUID tree.
2071 * The key is built like this:
2072 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2074 #if BTRFS_UUID_SIZE != 16
2075 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2077 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2078 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2079 * received subvols */
2082 * string items are for debugging. They just store a short string of
2085 #define BTRFS_STRING_ITEM_KEY 253
2088 * Flags for mount options.
2090 * Note: don't forget to add new options to btrfs_show_options()
2092 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2093 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2094 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2095 #define BTRFS_MOUNT_SSD (1 << 3)
2096 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2097 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2098 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2099 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2100 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2101 #define BTRFS_MOUNT_NOSSD (1 << 9)
2102 #define BTRFS_MOUNT_DISCARD (1 << 10)
2103 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2104 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2105 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2106 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2107 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2108 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2109 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2110 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2111 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2112 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2113 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2114 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2115 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2117 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2118 #define BTRFS_DEFAULT_MAX_INLINE (8192)
2120 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2121 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2122 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2123 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2126 #define btrfs_set_and_info(root, opt, fmt, args...) \
2128 if (!btrfs_test_opt(root, opt)) \
2129 btrfs_info(root->fs_info, fmt, ##args); \
2130 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2133 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2135 if (btrfs_test_opt(root, opt)) \
2136 btrfs_info(root->fs_info, fmt, ##args); \
2137 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2141 * Requests for changes that need to be done during transaction commit.
2143 * Internal mount options that are used for special handling of the real
2144 * mount options (eg. cannot be set during remount and have to be set during
2145 * transaction commit)
2148 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2149 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2150 #define BTRFS_PENDING_COMMIT (2)
2152 #define btrfs_test_pending(info, opt) \
2153 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2154 #define btrfs_set_pending(info, opt) \
2155 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2156 #define btrfs_clear_pending(info, opt) \
2157 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2160 * Helpers for setting pending mount option changes.
2162 * Expects corresponding macros
2163 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2165 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2167 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2168 btrfs_info((info), fmt, ##args); \
2169 btrfs_set_pending((info), SET_##opt); \
2170 btrfs_clear_pending((info), CLEAR_##opt); \
2174 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2176 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2177 btrfs_info((info), fmt, ##args); \
2178 btrfs_set_pending((info), CLEAR_##opt); \
2179 btrfs_clear_pending((info), SET_##opt); \
2186 #define BTRFS_INODE_NODATASUM (1 << 0)
2187 #define BTRFS_INODE_NODATACOW (1 << 1)
2188 #define BTRFS_INODE_READONLY (1 << 2)
2189 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2190 #define BTRFS_INODE_PREALLOC (1 << 4)
2191 #define BTRFS_INODE_SYNC (1 << 5)
2192 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2193 #define BTRFS_INODE_APPEND (1 << 7)
2194 #define BTRFS_INODE_NODUMP (1 << 8)
2195 #define BTRFS_INODE_NOATIME (1 << 9)
2196 #define BTRFS_INODE_DIRSYNC (1 << 10)
2197 #define BTRFS_INODE_COMPRESS (1 << 11)
2199 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2201 struct btrfs_map_token {
2202 struct extent_buffer *eb;
2204 unsigned long offset;
2207 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2209 token->kaddr = NULL;
2212 /* some macros to generate set/get funcs for the struct fields. This
2213 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2216 #define le8_to_cpu(v) (v)
2217 #define cpu_to_le8(v) (v)
2220 #define read_eb_member(eb, ptr, type, member, result) ( \
2221 read_extent_buffer(eb, (char *)(result), \
2222 ((unsigned long)(ptr)) + \
2223 offsetof(type, member), \
2224 sizeof(((type *)0)->member)))
2226 #define write_eb_member(eb, ptr, type, member, result) ( \
2227 write_extent_buffer(eb, (char *)(result), \
2228 ((unsigned long)(ptr)) + \
2229 offsetof(type, member), \
2230 sizeof(((type *)0)->member)))
2232 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2233 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2234 unsigned long off, \
2235 struct btrfs_map_token *token); \
2236 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2237 unsigned long off, u##bits val, \
2238 struct btrfs_map_token *token); \
2239 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2240 unsigned long off) \
2242 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2244 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2245 unsigned long off, u##bits val) \
2247 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2250 DECLARE_BTRFS_SETGET_BITS(8)
2251 DECLARE_BTRFS_SETGET_BITS(16)
2252 DECLARE_BTRFS_SETGET_BITS(32)
2253 DECLARE_BTRFS_SETGET_BITS(64)
2255 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2256 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2258 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2259 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2261 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2264 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2265 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2267 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2268 struct btrfs_map_token *token) \
2270 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2271 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2273 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2274 type *s, u##bits val, \
2275 struct btrfs_map_token *token) \
2277 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2278 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2281 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2282 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2284 type *p = page_address(eb->pages[0]); \
2285 u##bits res = le##bits##_to_cpu(p->member); \
2288 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2291 type *p = page_address(eb->pages[0]); \
2292 p->member = cpu_to_le##bits(val); \
2295 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2296 static inline u##bits btrfs_##name(type *s) \
2298 return le##bits##_to_cpu(s->member); \
2300 static inline void btrfs_set_##name(type *s, u##bits val) \
2302 s->member = cpu_to_le##bits(val); \
2305 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2306 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2307 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2308 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2309 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2310 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2312 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2313 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2314 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2315 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2316 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2317 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2319 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2320 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2322 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2324 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2326 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2328 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2330 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2331 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2333 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2335 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2337 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2340 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2342 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2345 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2347 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2350 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2351 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2352 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2353 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2354 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2355 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2356 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2357 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2358 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2359 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2360 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2362 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2364 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2367 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2368 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2369 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2371 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2373 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2375 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2377 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2378 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2380 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2382 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2383 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2385 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2388 unsigned long offset = (unsigned long)c;
2389 offset += offsetof(struct btrfs_chunk, stripe);
2390 offset += nr * sizeof(struct btrfs_stripe);
2391 return (struct btrfs_stripe *)offset;
2394 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2396 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2399 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2400 struct btrfs_chunk *c, int nr)
2402 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2405 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2406 struct btrfs_chunk *c, int nr)
2408 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2411 /* struct btrfs_block_group_item */
2412 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2414 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2416 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2417 struct btrfs_block_group_item, chunk_objectid, 64);
2419 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2420 struct btrfs_block_group_item, chunk_objectid, 64);
2421 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2422 struct btrfs_block_group_item, flags, 64);
2423 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2424 struct btrfs_block_group_item, flags, 64);
2426 /* struct btrfs_inode_ref */
2427 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2428 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2430 /* struct btrfs_inode_extref */
2431 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2432 parent_objectid, 64);
2433 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2435 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2437 /* struct btrfs_inode_item */
2438 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2439 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2440 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2441 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2442 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2443 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2444 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2445 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2446 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2447 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2448 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2449 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2450 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2452 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2454 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2456 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2457 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2459 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2461 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2462 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2463 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2464 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2465 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2466 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2468 static inline struct btrfs_timespec *
2469 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2471 unsigned long ptr = (unsigned long)inode_item;
2472 ptr += offsetof(struct btrfs_inode_item, atime);
2473 return (struct btrfs_timespec *)ptr;
2476 static inline struct btrfs_timespec *
2477 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2479 unsigned long ptr = (unsigned long)inode_item;
2480 ptr += offsetof(struct btrfs_inode_item, mtime);
2481 return (struct btrfs_timespec *)ptr;
2484 static inline struct btrfs_timespec *
2485 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2487 unsigned long ptr = (unsigned long)inode_item;
2488 ptr += offsetof(struct btrfs_inode_item, ctime);
2489 return (struct btrfs_timespec *)ptr;
2492 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2493 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2494 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2495 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2497 /* struct btrfs_dev_extent */
2498 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2500 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2501 chunk_objectid, 64);
2502 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2504 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2506 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2508 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2509 return (unsigned long)dev + ptr;
2512 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2513 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2515 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2517 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2520 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2522 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2523 struct btrfs_tree_block_info *item,
2524 struct btrfs_disk_key *key)
2526 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2529 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2530 struct btrfs_tree_block_info *item,
2531 struct btrfs_disk_key *key)
2533 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2536 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2538 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2540 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2542 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2545 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2548 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2550 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2553 static inline u32 btrfs_extent_inline_ref_size(int type)
2555 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2556 type == BTRFS_SHARED_BLOCK_REF_KEY)
2557 return sizeof(struct btrfs_extent_inline_ref);
2558 if (type == BTRFS_SHARED_DATA_REF_KEY)
2559 return sizeof(struct btrfs_shared_data_ref) +
2560 sizeof(struct btrfs_extent_inline_ref);
2561 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2562 return sizeof(struct btrfs_extent_data_ref) +
2563 offsetof(struct btrfs_extent_inline_ref, offset);
2568 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2569 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2571 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2572 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2574 /* struct btrfs_node */
2575 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2576 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2577 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2579 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2582 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2585 ptr = offsetof(struct btrfs_node, ptrs) +
2586 sizeof(struct btrfs_key_ptr) * nr;
2587 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2590 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2594 ptr = offsetof(struct btrfs_node, ptrs) +
2595 sizeof(struct btrfs_key_ptr) * nr;
2596 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2599 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2602 ptr = offsetof(struct btrfs_node, ptrs) +
2603 sizeof(struct btrfs_key_ptr) * nr;
2604 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2607 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2611 ptr = offsetof(struct btrfs_node, ptrs) +
2612 sizeof(struct btrfs_key_ptr) * nr;
2613 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2616 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2618 return offsetof(struct btrfs_node, ptrs) +
2619 sizeof(struct btrfs_key_ptr) * nr;
2622 void btrfs_node_key(struct extent_buffer *eb,
2623 struct btrfs_disk_key *disk_key, int nr);
2625 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2626 struct btrfs_disk_key *disk_key, int nr)
2629 ptr = btrfs_node_key_ptr_offset(nr);
2630 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2631 struct btrfs_key_ptr, key, disk_key);
2634 /* struct btrfs_item */
2635 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2636 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2637 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2638 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2640 static inline unsigned long btrfs_item_nr_offset(int nr)
2642 return offsetof(struct btrfs_leaf, items) +
2643 sizeof(struct btrfs_item) * nr;
2646 static inline struct btrfs_item *btrfs_item_nr(int nr)
2648 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2651 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2652 struct btrfs_item *item)
2654 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2657 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2659 return btrfs_item_end(eb, btrfs_item_nr(nr));
2662 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2664 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2667 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2669 return btrfs_item_size(eb, btrfs_item_nr(nr));
2672 static inline void btrfs_item_key(struct extent_buffer *eb,
2673 struct btrfs_disk_key *disk_key, int nr)
2675 struct btrfs_item *item = btrfs_item_nr(nr);
2676 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2679 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2680 struct btrfs_disk_key *disk_key, int nr)
2682 struct btrfs_item *item = btrfs_item_nr(nr);
2683 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2686 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2689 * struct btrfs_root_ref
2691 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2692 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2693 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2695 /* struct btrfs_dir_item */
2696 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2697 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2698 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2699 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2700 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2701 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2703 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2705 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2708 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2709 struct btrfs_dir_item *item,
2710 struct btrfs_disk_key *key)
2712 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2715 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2716 struct btrfs_dir_item *item,
2717 struct btrfs_disk_key *key)
2719 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2722 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2724 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2726 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2729 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2730 struct btrfs_free_space_header *h,
2731 struct btrfs_disk_key *key)
2733 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2736 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2737 struct btrfs_free_space_header *h,
2738 struct btrfs_disk_key *key)
2740 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2743 /* struct btrfs_disk_key */
2744 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2746 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2747 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2749 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2750 struct btrfs_disk_key *disk)
2752 cpu->offset = le64_to_cpu(disk->offset);
2753 cpu->type = disk->type;
2754 cpu->objectid = le64_to_cpu(disk->objectid);
2757 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2758 struct btrfs_key *cpu)
2760 disk->offset = cpu_to_le64(cpu->offset);
2761 disk->type = cpu->type;
2762 disk->objectid = cpu_to_le64(cpu->objectid);
2765 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2766 struct btrfs_key *key, int nr)
2768 struct btrfs_disk_key disk_key;
2769 btrfs_node_key(eb, &disk_key, nr);
2770 btrfs_disk_key_to_cpu(key, &disk_key);
2773 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2774 struct btrfs_key *key, int nr)
2776 struct btrfs_disk_key disk_key;
2777 btrfs_item_key(eb, &disk_key, nr);
2778 btrfs_disk_key_to_cpu(key, &disk_key);
2781 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2782 struct btrfs_dir_item *item,
2783 struct btrfs_key *key)
2785 struct btrfs_disk_key disk_key;
2786 btrfs_dir_item_key(eb, item, &disk_key);
2787 btrfs_disk_key_to_cpu(key, &disk_key);
2791 static inline u8 btrfs_key_type(struct btrfs_key *key)
2796 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2801 /* struct btrfs_header */
2802 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2803 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2805 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2806 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2807 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2808 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2809 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2811 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2812 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2814 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2816 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2818 return (btrfs_header_flags(eb) & flag) == flag;
2821 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2823 u64 flags = btrfs_header_flags(eb);
2824 btrfs_set_header_flags(eb, flags | flag);
2825 return (flags & flag) == flag;
2828 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2830 u64 flags = btrfs_header_flags(eb);
2831 btrfs_set_header_flags(eb, flags & ~flag);
2832 return (flags & flag) == flag;
2835 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2837 u64 flags = btrfs_header_flags(eb);
2838 return flags >> BTRFS_BACKREF_REV_SHIFT;
2841 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2844 u64 flags = btrfs_header_flags(eb);
2845 flags &= ~BTRFS_BACKREF_REV_MASK;
2846 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2847 btrfs_set_header_flags(eb, flags);
2850 static inline unsigned long btrfs_header_fsid(void)
2852 return offsetof(struct btrfs_header, fsid);
2855 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2857 return offsetof(struct btrfs_header, chunk_tree_uuid);
2860 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2862 return btrfs_header_level(eb) == 0;
2865 /* struct btrfs_root_item */
2866 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2868 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2869 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2870 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2872 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2874 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2875 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2876 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2877 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2878 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2879 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2880 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2881 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2883 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2885 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2887 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2889 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2891 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2894 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2896 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2899 static inline bool btrfs_root_dead(struct btrfs_root *root)
2901 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2904 /* struct btrfs_root_backup */
2905 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2907 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2909 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2910 tree_root_level, 8);
2912 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2914 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2915 chunk_root_gen, 64);
2916 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2917 chunk_root_level, 8);
2919 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2921 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2922 extent_root_gen, 64);
2923 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2924 extent_root_level, 8);
2926 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2928 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2930 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2933 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2935 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2937 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2940 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2942 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2944 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2945 csum_root_level, 8);
2946 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2948 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2950 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2953 /* struct btrfs_balance_item */
2954 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2956 static inline void btrfs_balance_data(struct extent_buffer *eb,
2957 struct btrfs_balance_item *bi,
2958 struct btrfs_disk_balance_args *ba)
2960 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2963 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2964 struct btrfs_balance_item *bi,
2965 struct btrfs_disk_balance_args *ba)
2967 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2970 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2971 struct btrfs_balance_item *bi,
2972 struct btrfs_disk_balance_args *ba)
2974 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2977 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2978 struct btrfs_balance_item *bi,
2979 struct btrfs_disk_balance_args *ba)
2981 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2984 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2985 struct btrfs_balance_item *bi,
2986 struct btrfs_disk_balance_args *ba)
2988 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2991 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2992 struct btrfs_balance_item *bi,
2993 struct btrfs_disk_balance_args *ba)
2995 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2999 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3000 struct btrfs_disk_balance_args *disk)
3002 memset(cpu, 0, sizeof(*cpu));
3004 cpu->profiles = le64_to_cpu(disk->profiles);
3005 cpu->usage = le64_to_cpu(disk->usage);
3006 cpu->devid = le64_to_cpu(disk->devid);
3007 cpu->pstart = le64_to_cpu(disk->pstart);
3008 cpu->pend = le64_to_cpu(disk->pend);
3009 cpu->vstart = le64_to_cpu(disk->vstart);
3010 cpu->vend = le64_to_cpu(disk->vend);
3011 cpu->target = le64_to_cpu(disk->target);
3012 cpu->flags = le64_to_cpu(disk->flags);
3013 cpu->limit = le64_to_cpu(disk->limit);
3017 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3018 struct btrfs_balance_args *cpu)
3020 memset(disk, 0, sizeof(*disk));
3022 disk->profiles = cpu_to_le64(cpu->profiles);
3023 disk->usage = cpu_to_le64(cpu->usage);
3024 disk->devid = cpu_to_le64(cpu->devid);
3025 disk->pstart = cpu_to_le64(cpu->pstart);
3026 disk->pend = cpu_to_le64(cpu->pend);
3027 disk->vstart = cpu_to_le64(cpu->vstart);
3028 disk->vend = cpu_to_le64(cpu->vend);
3029 disk->target = cpu_to_le64(cpu->target);
3030 disk->flags = cpu_to_le64(cpu->flags);
3031 disk->limit = cpu_to_le64(cpu->limit);
3034 /* struct btrfs_super_block */
3035 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3036 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3037 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3039 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3040 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3041 struct btrfs_super_block, sys_chunk_array_size, 32);
3042 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3043 struct btrfs_super_block, chunk_root_generation, 64);
3044 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3046 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3048 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
3049 chunk_root_level, 8);
3050 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3052 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3053 log_root_transid, 64);
3054 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3056 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3058 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3060 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3062 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3064 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3066 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3067 root_dir_objectid, 64);
3068 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3070 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3072 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
3073 compat_ro_flags, 64);
3074 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3075 incompat_flags, 64);
3076 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3078 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3079 cache_generation, 64);
3080 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3081 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3082 uuid_tree_generation, 64);
3084 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3086 u16 t = btrfs_super_csum_type(s);
3088 * csum type is validated at mount time
3090 return btrfs_csum_sizes[t];
3093 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3095 return offsetof(struct btrfs_leaf, items);
3098 /* struct btrfs_file_extent_item */
3099 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3100 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3101 struct btrfs_file_extent_item, disk_bytenr, 64);
3102 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3103 struct btrfs_file_extent_item, offset, 64);
3104 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3105 struct btrfs_file_extent_item, generation, 64);
3106 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3107 struct btrfs_file_extent_item, num_bytes, 64);
3108 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3109 struct btrfs_file_extent_item, disk_num_bytes, 64);
3110 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3111 struct btrfs_file_extent_item, compression, 8);
3113 static inline unsigned long
3114 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3116 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3119 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3121 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3124 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3126 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3128 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3129 disk_num_bytes, 64);
3130 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3132 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3134 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3136 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3138 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3140 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3141 other_encoding, 16);
3144 * this returns the number of bytes used by the item on disk, minus the
3145 * size of any extent headers. If a file is compressed on disk, this is
3146 * the compressed size
3148 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3149 struct btrfs_item *e)
3151 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
3154 /* this returns the number of file bytes represented by the inline item.
3155 * If an item is compressed, this is the uncompressed size
3157 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3159 struct btrfs_file_extent_item *fi)
3161 struct btrfs_map_token token;
3163 btrfs_init_map_token(&token);
3165 * return the space used on disk if this item isn't
3166 * compressed or encoded
3168 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3169 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3170 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3171 return btrfs_file_extent_inline_item_len(eb,
3172 btrfs_item_nr(slot));
3175 /* otherwise use the ram bytes field */
3176 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3180 /* btrfs_dev_stats_item */
3181 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3182 struct btrfs_dev_stats_item *ptr,
3187 read_extent_buffer(eb, &val,
3188 offsetof(struct btrfs_dev_stats_item, values) +
3189 ((unsigned long)ptr) + (index * sizeof(u64)),
3194 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3195 struct btrfs_dev_stats_item *ptr,
3198 write_extent_buffer(eb, &val,
3199 offsetof(struct btrfs_dev_stats_item, values) +
3200 ((unsigned long)ptr) + (index * sizeof(u64)),
3204 /* btrfs_qgroup_status_item */
3205 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3207 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3209 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3211 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3214 /* btrfs_qgroup_info_item */
3215 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3217 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3218 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3220 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3221 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3224 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3225 struct btrfs_qgroup_info_item, generation, 64);
3226 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3228 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3229 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3230 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3232 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3233 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3235 /* btrfs_qgroup_limit_item */
3236 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3238 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3240 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3242 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3244 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3247 /* btrfs_dev_replace_item */
3248 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3249 struct btrfs_dev_replace_item, src_devid, 64);
3250 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3251 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3253 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3255 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3257 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3259 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3260 num_write_errors, 64);
3261 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3262 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3264 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3266 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3269 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3270 struct btrfs_dev_replace_item, src_devid, 64);
3271 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3272 struct btrfs_dev_replace_item,
3273 cont_reading_from_srcdev_mode, 64);
3274 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3275 struct btrfs_dev_replace_item, replace_state, 64);
3276 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3277 struct btrfs_dev_replace_item, time_started, 64);
3278 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3279 struct btrfs_dev_replace_item, time_stopped, 64);
3280 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3281 struct btrfs_dev_replace_item, num_write_errors, 64);
3282 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3283 struct btrfs_dev_replace_item,
3284 num_uncorrectable_read_errors, 64);
3285 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3286 struct btrfs_dev_replace_item, cursor_left, 64);
3287 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3288 struct btrfs_dev_replace_item, cursor_right, 64);
3290 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3292 return sb->s_fs_info;
3295 /* helper function to cast into the data area of the leaf. */
3296 #define btrfs_item_ptr(leaf, slot, type) \
3297 ((type *)(btrfs_leaf_data(leaf) + \
3298 btrfs_item_offset_nr(leaf, slot)))
3300 #define btrfs_item_ptr_offset(leaf, slot) \
3301 ((unsigned long)(btrfs_leaf_data(leaf) + \
3302 btrfs_item_offset_nr(leaf, slot)))
3304 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3306 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3307 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3310 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3312 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3316 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3319 return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3324 * Doing a truncate won't result in new nodes or leaves, just what we need for
3327 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3330 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3333 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3334 struct btrfs_root *root);
3335 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3336 struct btrfs_root *root);
3337 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3338 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3339 struct btrfs_root *root, unsigned long count);
3340 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3341 unsigned long count, int wait);
3342 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3343 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3344 struct btrfs_root *root, u64 bytenr,
3345 u64 offset, int metadata, u64 *refs, u64 *flags);
3346 int btrfs_pin_extent(struct btrfs_root *root,
3347 u64 bytenr, u64 num, int reserved);
3348 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3349 u64 bytenr, u64 num_bytes);
3350 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3351 struct extent_buffer *eb);
3352 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3353 struct btrfs_root *root,
3354 u64 objectid, u64 offset, u64 bytenr);
3355 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3356 struct btrfs_fs_info *info,
3358 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3359 int get_block_group_index(struct btrfs_block_group_cache *cache);
3360 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3361 struct btrfs_root *root, u64 parent,
3363 struct btrfs_disk_key *key, int level,
3364 u64 hint, u64 empty_size);
3365 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3366 struct btrfs_root *root,
3367 struct extent_buffer *buf,
3368 u64 parent, int last_ref);
3369 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3370 struct btrfs_root *root,
3371 u64 root_objectid, u64 owner,
3372 u64 offset, struct btrfs_key *ins);
3373 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3374 struct btrfs_root *root,
3375 u64 root_objectid, u64 owner, u64 offset,
3376 struct btrfs_key *ins);
3377 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3378 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3379 struct btrfs_key *ins, int is_data, int delalloc);
3380 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3381 struct extent_buffer *buf, int full_backref);
3382 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3383 struct extent_buffer *buf, int full_backref);
3384 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3385 struct btrfs_root *root,
3386 u64 bytenr, u64 num_bytes, u64 flags,
3387 int level, int is_data);
3388 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3389 struct btrfs_root *root,
3390 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3391 u64 owner, u64 offset, int no_quota);
3393 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3395 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3396 u64 start, u64 len);
3397 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3398 struct btrfs_root *root);
3399 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3400 struct btrfs_root *root);
3401 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3402 struct btrfs_root *root,
3403 u64 bytenr, u64 num_bytes, u64 parent,
3404 u64 root_objectid, u64 owner, u64 offset, int no_quota);
3406 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3407 struct btrfs_root *root);
3408 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3409 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3410 int btrfs_read_block_groups(struct btrfs_root *root);
3411 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3412 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3413 struct btrfs_root *root, u64 bytes_used,
3414 u64 type, u64 chunk_objectid, u64 chunk_offset,
3416 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3417 struct btrfs_root *root, u64 group_start,
3418 struct extent_map *em);
3419 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3420 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3421 struct btrfs_root *root);
3422 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3423 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3425 enum btrfs_reserve_flush_enum {
3426 /* If we are in the transaction, we can't flush anything.*/
3427 BTRFS_RESERVE_NO_FLUSH,
3429 * Flushing delalloc may cause deadlock somewhere, in this
3430 * case, use FLUSH LIMIT
3432 BTRFS_RESERVE_FLUSH_LIMIT,
3433 BTRFS_RESERVE_FLUSH_ALL,
3436 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3437 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3438 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3439 struct btrfs_root *root);
3440 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3441 struct inode *inode);
3442 void btrfs_orphan_release_metadata(struct inode *inode);
3443 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3444 struct btrfs_block_rsv *rsv,
3446 u64 *qgroup_reserved, bool use_global_rsv);
3447 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3448 struct btrfs_block_rsv *rsv,
3449 u64 qgroup_reserved);
3450 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3451 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3452 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3453 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3454 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3455 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3456 unsigned short type);
3457 void btrfs_free_block_rsv(struct btrfs_root *root,
3458 struct btrfs_block_rsv *rsv);
3459 int btrfs_block_rsv_add(struct btrfs_root *root,
3460 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3461 enum btrfs_reserve_flush_enum flush);
3462 int btrfs_block_rsv_check(struct btrfs_root *root,
3463 struct btrfs_block_rsv *block_rsv, int min_factor);
3464 int btrfs_block_rsv_refill(struct btrfs_root *root,
3465 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3466 enum btrfs_reserve_flush_enum flush);
3467 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3468 struct btrfs_block_rsv *dst_rsv,
3470 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3471 struct btrfs_block_rsv *dest, u64 num_bytes,
3473 void btrfs_block_rsv_release(struct btrfs_root *root,
3474 struct btrfs_block_rsv *block_rsv,
3476 int btrfs_set_block_group_ro(struct btrfs_root *root,
3477 struct btrfs_block_group_cache *cache);
3478 void btrfs_set_block_group_rw(struct btrfs_root *root,
3479 struct btrfs_block_group_cache *cache);
3480 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3481 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3482 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3483 u64 start, u64 end);
3484 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3485 u64 num_bytes, u64 *actual_bytes);
3486 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3487 struct btrfs_root *root, u64 type);
3488 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3490 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3491 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3492 struct btrfs_fs_info *fs_info);
3493 int __get_raid_index(u64 flags);
3494 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3495 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3497 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3498 int level, int *slot);
3499 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3500 int btrfs_previous_item(struct btrfs_root *root,
3501 struct btrfs_path *path, u64 min_objectid,
3503 int btrfs_previous_extent_item(struct btrfs_root *root,
3504 struct btrfs_path *path, u64 min_objectid);
3505 void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
3506 struct btrfs_key *new_key);
3507 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3508 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3509 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3510 struct btrfs_key *key, int lowest_level,
3512 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3513 struct btrfs_path *path,
3515 enum btrfs_compare_tree_result {
3516 BTRFS_COMPARE_TREE_NEW,
3517 BTRFS_COMPARE_TREE_DELETED,
3518 BTRFS_COMPARE_TREE_CHANGED,
3519 BTRFS_COMPARE_TREE_SAME,
3521 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3522 struct btrfs_root *right_root,
3523 struct btrfs_path *left_path,
3524 struct btrfs_path *right_path,
3525 struct btrfs_key *key,
3526 enum btrfs_compare_tree_result result,
3528 int btrfs_compare_trees(struct btrfs_root *left_root,
3529 struct btrfs_root *right_root,
3530 btrfs_changed_cb_t cb, void *ctx);
3531 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3532 struct btrfs_root *root, struct extent_buffer *buf,
3533 struct extent_buffer *parent, int parent_slot,
3534 struct extent_buffer **cow_ret);
3535 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3536 struct btrfs_root *root,
3537 struct extent_buffer *buf,
3538 struct extent_buffer **cow_ret, u64 new_root_objectid);
3539 int btrfs_block_can_be_shared(struct btrfs_root *root,
3540 struct extent_buffer *buf);
3541 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3543 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3544 u32 new_size, int from_end);
3545 int btrfs_split_item(struct btrfs_trans_handle *trans,
3546 struct btrfs_root *root,
3547 struct btrfs_path *path,
3548 struct btrfs_key *new_key,
3549 unsigned long split_offset);
3550 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3551 struct btrfs_root *root,
3552 struct btrfs_path *path,
3553 struct btrfs_key *new_key);
3554 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3555 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3556 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3557 *root, struct btrfs_key *key, struct btrfs_path *p, int
3559 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3560 struct btrfs_path *p, u64 time_seq);
3561 int btrfs_search_slot_for_read(struct btrfs_root *root,
3562 struct btrfs_key *key, struct btrfs_path *p,
3563 int find_higher, int return_any);
3564 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3565 struct btrfs_root *root, struct extent_buffer *parent,
3566 int start_slot, u64 *last_ret,
3567 struct btrfs_key *progress);
3568 void btrfs_release_path(struct btrfs_path *p);
3569 struct btrfs_path *btrfs_alloc_path(void);
3570 void btrfs_free_path(struct btrfs_path *p);
3571 void btrfs_set_path_blocking(struct btrfs_path *p);
3572 void btrfs_clear_path_blocking(struct btrfs_path *p,
3573 struct extent_buffer *held, int held_rw);
3574 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3576 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3577 struct btrfs_path *path, int slot, int nr);
3578 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3579 struct btrfs_root *root,
3580 struct btrfs_path *path)
3582 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3585 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3586 struct btrfs_key *cpu_key, u32 *data_size,
3587 u32 total_data, u32 total_size, int nr);
3588 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3589 *root, struct btrfs_key *key, void *data, u32 data_size);
3590 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3591 struct btrfs_root *root,
3592 struct btrfs_path *path,
3593 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3595 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3596 struct btrfs_root *root,
3597 struct btrfs_path *path,
3598 struct btrfs_key *key,
3601 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3604 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3605 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3606 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3608 static inline int btrfs_next_old_item(struct btrfs_root *root,
3609 struct btrfs_path *p, u64 time_seq)
3612 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3613 return btrfs_next_old_leaf(root, p, time_seq);
3616 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3618 return btrfs_next_old_item(root, p, 0);
3620 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3621 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3622 struct btrfs_block_rsv *block_rsv,
3623 int update_ref, int for_reloc);
3624 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3625 struct btrfs_root *root,
3626 struct extent_buffer *node,
3627 struct extent_buffer *parent);
3628 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3631 * Get synced with close_ctree()
3634 return fs_info->closing;
3638 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3639 * anything except sleeping. This function is used to check the status of
3642 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3644 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3645 btrfs_fs_closing(root->fs_info));
3648 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3650 kfree(fs_info->balance_ctl);
3651 kfree(fs_info->delayed_root);
3652 kfree(fs_info->extent_root);
3653 kfree(fs_info->tree_root);
3654 kfree(fs_info->chunk_root);
3655 kfree(fs_info->dev_root);
3656 kfree(fs_info->csum_root);
3657 kfree(fs_info->quota_root);
3658 kfree(fs_info->uuid_root);
3659 kfree(fs_info->super_copy);
3660 kfree(fs_info->super_for_commit);
3661 security_free_mnt_opts(&fs_info->security_opts);
3665 /* tree mod log functions from ctree.c */
3666 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3667 struct seq_list *elem);
3668 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3669 struct seq_list *elem);
3670 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3673 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3674 struct btrfs_path *path,
3675 u64 root_id, u64 ref_id);
3676 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3677 struct btrfs_root *tree_root,
3678 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3679 const char *name, int name_len);
3680 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3681 struct btrfs_root *tree_root,
3682 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3683 const char *name, int name_len);
3684 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3685 struct btrfs_key *key);
3686 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3687 *root, struct btrfs_key *key, struct btrfs_root_item
3689 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3690 struct btrfs_root *root,
3691 struct btrfs_key *key,
3692 struct btrfs_root_item *item);
3693 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3694 struct btrfs_path *path, struct btrfs_root_item *root_item,
3695 struct btrfs_key *root_key);
3696 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3697 void btrfs_set_root_node(struct btrfs_root_item *item,
3698 struct extent_buffer *node);
3699 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3700 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3701 struct btrfs_root *root);
3704 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3705 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3707 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3708 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3710 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3711 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3715 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3716 const char *name, int name_len);
3717 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3718 struct btrfs_root *root, const char *name,
3719 int name_len, struct inode *dir,
3720 struct btrfs_key *location, u8 type, u64 index);
3721 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3722 struct btrfs_root *root,
3723 struct btrfs_path *path, u64 dir,
3724 const char *name, int name_len,
3726 struct btrfs_dir_item *
3727 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3728 struct btrfs_root *root,
3729 struct btrfs_path *path, u64 dir,
3730 u64 objectid, const char *name, int name_len,
3732 struct btrfs_dir_item *
3733 btrfs_search_dir_index_item(struct btrfs_root *root,
3734 struct btrfs_path *path, u64 dirid,
3735 const char *name, int name_len);
3736 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3737 struct btrfs_root *root,
3738 struct btrfs_path *path,
3739 struct btrfs_dir_item *di);
3740 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3741 struct btrfs_root *root,
3742 struct btrfs_path *path, u64 objectid,
3743 const char *name, u16 name_len,
3744 const void *data, u16 data_len);
3745 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3746 struct btrfs_root *root,
3747 struct btrfs_path *path, u64 dir,
3748 const char *name, u16 name_len,
3750 int verify_dir_item(struct btrfs_root *root,
3751 struct extent_buffer *leaf,
3752 struct btrfs_dir_item *dir_item);
3753 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3754 struct btrfs_path *path,
3759 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3760 struct btrfs_root *root, u64 offset);
3761 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3762 struct btrfs_root *root, u64 offset);
3763 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3766 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3767 struct btrfs_root *root,
3768 const char *name, int name_len,
3769 u64 inode_objectid, u64 ref_objectid, u64 index);
3770 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3771 struct btrfs_root *root,
3772 const char *name, int name_len,
3773 u64 inode_objectid, u64 ref_objectid, u64 *index);
3774 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3775 struct btrfs_root *root,
3776 struct btrfs_path *path, u64 objectid);
3777 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3778 *root, struct btrfs_path *path,
3779 struct btrfs_key *location, int mod);
3781 struct btrfs_inode_extref *
3782 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3783 struct btrfs_root *root,
3784 struct btrfs_path *path,
3785 const char *name, int name_len,
3786 u64 inode_objectid, u64 ref_objectid, int ins_len,
3789 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3790 u64 ref_objectid, const char *name,
3792 struct btrfs_inode_extref **extref_ret);
3795 struct btrfs_dio_private;
3796 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3797 struct btrfs_root *root, u64 bytenr, u64 len);
3798 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3799 struct bio *bio, u32 *dst);
3800 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3801 struct bio *bio, u64 logical_offset);
3802 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3803 struct btrfs_root *root,
3804 u64 objectid, u64 pos,
3805 u64 disk_offset, u64 disk_num_bytes,
3806 u64 num_bytes, u64 offset, u64 ram_bytes,
3807 u8 compression, u8 encryption, u16 other_encoding);
3808 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3809 struct btrfs_root *root,
3810 struct btrfs_path *path, u64 objectid,
3811 u64 bytenr, int mod);
3812 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3813 struct btrfs_root *root,
3814 struct btrfs_ordered_sum *sums);
3815 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3816 struct bio *bio, u64 file_start, int contig);
3817 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3818 struct list_head *list, int search_commit);
3819 void btrfs_extent_item_to_extent_map(struct inode *inode,
3820 const struct btrfs_path *path,
3821 struct btrfs_file_extent_item *fi,
3822 const bool new_inline,
3823 struct extent_map *em);
3826 struct btrfs_delalloc_work {
3827 struct inode *inode;
3830 struct completion completion;
3831 struct list_head list;
3832 struct btrfs_work work;
3835 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3836 int wait, int delay_iput);
3837 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3839 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3840 size_t pg_offset, u64 start, u64 len,
3842 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3843 u64 *orig_start, u64 *orig_block_len,
3846 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3847 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3848 #define ClearPageChecked ClearPageFsMisc
3849 #define SetPageChecked SetPageFsMisc
3850 #define PageChecked PageFsMisc
3853 /* This forces readahead on a given range of bytes in an inode */
3854 static inline void btrfs_force_ra(struct address_space *mapping,
3855 struct file_ra_state *ra, struct file *file,
3856 pgoff_t offset, unsigned long req_size)
3858 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3861 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3862 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3863 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3864 struct btrfs_root *root,
3865 struct inode *dir, struct inode *inode,
3866 const char *name, int name_len);
3867 int btrfs_add_link(struct btrfs_trans_handle *trans,
3868 struct inode *parent_inode, struct inode *inode,
3869 const char *name, int name_len, int add_backref, u64 index);
3870 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3871 struct btrfs_root *root,
3872 struct inode *dir, u64 objectid,
3873 const char *name, int name_len);
3874 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3876 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3877 struct btrfs_root *root,
3878 struct inode *inode, u64 new_size,
3881 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3882 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3884 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3885 struct extent_state **cached_state);
3886 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3887 struct btrfs_root *new_root,
3888 struct btrfs_root *parent_root,
3890 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3891 size_t size, struct bio *bio,
3892 unsigned long bio_flags);
3893 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3894 int btrfs_readpage(struct file *file, struct page *page);
3895 void btrfs_evict_inode(struct inode *inode);
3896 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3897 struct inode *btrfs_alloc_inode(struct super_block *sb);
3898 void btrfs_destroy_inode(struct inode *inode);
3899 int btrfs_drop_inode(struct inode *inode);
3900 int btrfs_init_cachep(void);
3901 void btrfs_destroy_cachep(void);
3902 long btrfs_ioctl_trans_end(struct file *file);
3903 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3904 struct btrfs_root *root, int *was_new);
3905 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3906 size_t pg_offset, u64 start, u64 end,
3908 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3909 struct btrfs_root *root,
3910 struct inode *inode);
3911 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3912 struct btrfs_root *root, struct inode *inode);
3913 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3914 int btrfs_orphan_cleanup(struct btrfs_root *root);
3915 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3916 struct btrfs_root *root);
3917 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3918 void btrfs_invalidate_inodes(struct btrfs_root *root);
3919 void btrfs_add_delayed_iput(struct inode *inode);
3920 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3921 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3922 u64 start, u64 num_bytes, u64 min_size,
3923 loff_t actual_len, u64 *alloc_hint);
3924 int btrfs_prealloc_file_range_trans(struct inode *inode,
3925 struct btrfs_trans_handle *trans, int mode,
3926 u64 start, u64 num_bytes, u64 min_size,
3927 loff_t actual_len, u64 *alloc_hint);
3928 int btrfs_inode_check_errors(struct inode *inode);
3929 extern const struct dentry_operations btrfs_dentry_operations;
3932 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3933 void btrfs_update_iflags(struct inode *inode);
3934 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3935 int btrfs_is_empty_uuid(u8 *uuid);
3936 int btrfs_defrag_file(struct inode *inode, struct file *file,
3937 struct btrfs_ioctl_defrag_range_args *range,
3938 u64 newer_than, unsigned long max_pages);
3939 void btrfs_get_block_group_info(struct list_head *groups_list,
3940 struct btrfs_ioctl_space_info *space);
3941 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3942 struct btrfs_ioctl_balance_args *bargs);
3946 int btrfs_auto_defrag_init(void);
3947 void btrfs_auto_defrag_exit(void);
3948 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3949 struct inode *inode);
3950 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3951 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3952 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3953 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3955 extern const struct file_operations btrfs_file_operations;
3956 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3957 struct btrfs_root *root, struct inode *inode,
3958 struct btrfs_path *path, u64 start, u64 end,
3959 u64 *drop_end, int drop_cache,
3961 u32 extent_item_size,
3963 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3964 struct btrfs_root *root, struct inode *inode, u64 start,
3965 u64 end, int drop_cache);
3966 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3967 struct inode *inode, u64 start, u64 end);
3968 int btrfs_release_file(struct inode *inode, struct file *file);
3969 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3970 struct page **pages, size_t num_pages,
3971 loff_t pos, size_t write_bytes,
3972 struct extent_state **cached);
3973 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3976 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3977 struct btrfs_root *root);
3980 int btrfs_init_sysfs(void);
3981 void btrfs_exit_sysfs(void);
3982 int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
3983 void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
3986 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3989 int btrfs_parse_options(struct btrfs_root *root, char *options);
3990 int btrfs_sync_fs(struct super_block *sb, int wait);
3992 #ifdef CONFIG_PRINTK
3994 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3996 static inline __printf(2, 3)
3997 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4002 #define btrfs_emerg(fs_info, fmt, args...) \
4003 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4004 #define btrfs_alert(fs_info, fmt, args...) \
4005 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4006 #define btrfs_crit(fs_info, fmt, args...) \
4007 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4008 #define btrfs_err(fs_info, fmt, args...) \
4009 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4010 #define btrfs_warn(fs_info, fmt, args...) \
4011 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4012 #define btrfs_notice(fs_info, fmt, args...) \
4013 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4014 #define btrfs_info(fs_info, fmt, args...) \
4015 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4018 #define btrfs_debug(fs_info, fmt, args...) \
4019 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4021 #define btrfs_debug(fs_info, fmt, args...) \
4022 no_printk(KERN_DEBUG fmt, ##args)
4025 #ifdef CONFIG_BTRFS_ASSERT
4027 static inline void assfail(char *expr, char *file, int line)
4029 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4034 #define ASSERT(expr) \
4035 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4037 #define ASSERT(expr) ((void)0)
4040 #define btrfs_assert()
4042 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
4043 unsigned int line, int errno, const char *fmt, ...);
4046 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4047 struct btrfs_root *root, const char *function,
4048 unsigned int line, int errno);
4050 #define btrfs_set_fs_incompat(__fs_info, opt) \
4051 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4053 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4056 struct btrfs_super_block *disk_super;
4059 disk_super = fs_info->super_copy;
4060 features = btrfs_super_incompat_flags(disk_super);
4061 if (!(features & flag)) {
4062 spin_lock(&fs_info->super_lock);
4063 features = btrfs_super_incompat_flags(disk_super);
4064 if (!(features & flag)) {
4066 btrfs_set_super_incompat_flags(disk_super, features);
4067 btrfs_info(fs_info, "setting %llu feature flag",
4070 spin_unlock(&fs_info->super_lock);
4074 #define btrfs_fs_incompat(fs_info, opt) \
4075 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4077 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4079 struct btrfs_super_block *disk_super;
4080 disk_super = fs_info->super_copy;
4081 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4085 * Call btrfs_abort_transaction as early as possible when an error condition is
4086 * detected, that way the exact line number is reported.
4089 #define btrfs_abort_transaction(trans, root, errno) \
4091 __btrfs_abort_transaction(trans, root, __func__, \
4095 #define btrfs_std_error(fs_info, errno) \
4098 __btrfs_std_error((fs_info), __func__, \
4099 __LINE__, (errno), NULL); \
4102 #define btrfs_error(fs_info, errno, fmt, args...) \
4104 __btrfs_std_error((fs_info), __func__, __LINE__, \
4105 (errno), fmt, ##args); \
4109 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4110 unsigned int line, int errno, const char *fmt, ...);
4113 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4114 * will panic(). Otherwise we BUG() here.
4116 #define btrfs_panic(fs_info, errno, fmt, args...) \
4118 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4123 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4124 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4125 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4126 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4127 struct inode *inode, struct inode *dir);
4129 #define btrfs_get_acl NULL
4130 #define btrfs_set_acl NULL
4131 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4132 struct inode *inode, struct inode *dir)
4139 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4140 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4141 struct btrfs_root *root);
4142 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4143 struct btrfs_root *root);
4144 int btrfs_recover_relocation(struct btrfs_root *root);
4145 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4146 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4147 struct btrfs_root *root, struct extent_buffer *buf,
4148 struct extent_buffer *cow);
4149 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
4150 struct btrfs_pending_snapshot *pending,
4151 u64 *bytes_to_reserve);
4152 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4153 struct btrfs_pending_snapshot *pending);
4156 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4157 u64 end, struct btrfs_scrub_progress *progress,
4158 int readonly, int is_dev_replace);
4159 void btrfs_scrub_pause(struct btrfs_root *root);
4160 void btrfs_scrub_continue(struct btrfs_root *root);
4161 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4162 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4163 struct btrfs_device *dev);
4164 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4165 struct btrfs_scrub_progress *progress);
4168 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4169 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4170 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4172 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4174 btrfs_bio_counter_sub(fs_info, 1);
4178 struct reada_control {
4179 struct btrfs_root *root; /* tree to prefetch */
4180 struct btrfs_key key_start;
4181 struct btrfs_key key_end; /* exclusive */
4184 wait_queue_head_t wait;
4186 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4187 struct btrfs_key *start, struct btrfs_key *end);
4188 int btrfs_reada_wait(void *handle);
4189 void btrfs_reada_detach(void *handle);
4190 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4191 u64 start, int err);
4193 static inline int is_fstree(u64 rootid)
4195 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4196 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4201 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4203 return signal_pending(current);
4206 /* Sanity test specific functions */
4207 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4208 void btrfs_test_destroy_inode(struct inode *inode);
4211 static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4213 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4214 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))