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)
201 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
204 * The key defines the order in the tree, and so it also defines (optimal)
207 * objectid corresponds to the inode number.
209 * type tells us things about the object, and is a kind of stream selector.
210 * so for a given inode, keys with type of 1 might refer to the inode data,
211 * type of 2 may point to file data in the btree and type == 3 may point to
214 * offset is the starting byte offset for this key in the stream.
216 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
217 * in cpu native order. Otherwise they are identical and their sizes
218 * should be the same (ie both packed)
220 struct btrfs_disk_key {
224 } __attribute__ ((__packed__));
230 } __attribute__ ((__packed__));
232 struct btrfs_mapping_tree {
233 struct extent_map_tree map_tree;
236 struct btrfs_dev_item {
237 /* the internal btrfs device id */
240 /* size of the device */
246 /* optimal io alignment for this device */
249 /* optimal io width for this device */
252 /* minimal io size for this device */
255 /* type and info about this device */
258 /* expected generation for this device */
262 * starting byte of this partition on the device,
263 * to allow for stripe alignment in the future
267 /* grouping information for allocation decisions */
270 /* seek speed 0-100 where 100 is fastest */
273 /* bandwidth 0-100 where 100 is fastest */
276 /* btrfs generated uuid for this device */
277 u8 uuid[BTRFS_UUID_SIZE];
279 /* uuid of FS who owns this device */
280 u8 fsid[BTRFS_UUID_SIZE];
281 } __attribute__ ((__packed__));
283 struct btrfs_stripe {
286 u8 dev_uuid[BTRFS_UUID_SIZE];
287 } __attribute__ ((__packed__));
290 /* size of this chunk in bytes */
293 /* objectid of the root referencing this chunk */
299 /* optimal io alignment for this chunk */
302 /* optimal io width for this chunk */
305 /* minimal io size for this chunk */
308 /* 2^16 stripes is quite a lot, a second limit is the size of a single
313 /* sub stripes only matter for raid10 */
315 struct btrfs_stripe stripe;
316 /* additional stripes go here */
317 } __attribute__ ((__packed__));
319 #define BTRFS_FREE_SPACE_EXTENT 1
320 #define BTRFS_FREE_SPACE_BITMAP 2
322 struct btrfs_free_space_entry {
326 } __attribute__ ((__packed__));
328 struct btrfs_free_space_header {
329 struct btrfs_disk_key location;
333 } __attribute__ ((__packed__));
335 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
337 BUG_ON(num_stripes == 0);
338 return sizeof(struct btrfs_chunk) +
339 sizeof(struct btrfs_stripe) * (num_stripes - 1);
342 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
343 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
348 #define BTRFS_FS_STATE_ERROR 0
349 #define BTRFS_FS_STATE_REMOUNTING 1
350 #define BTRFS_FS_STATE_TRANS_ABORTED 2
351 #define BTRFS_FS_STATE_DEV_REPLACING 3
353 /* Super block flags */
354 /* Errors detected */
355 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
357 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
358 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
360 #define BTRFS_BACKREF_REV_MAX 256
361 #define BTRFS_BACKREF_REV_SHIFT 56
362 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
363 BTRFS_BACKREF_REV_SHIFT)
365 #define BTRFS_OLD_BACKREF_REV 0
366 #define BTRFS_MIXED_BACKREF_REV 1
369 * every tree block (leaf or node) starts with this header.
371 struct btrfs_header {
372 /* these first four must match the super block */
373 u8 csum[BTRFS_CSUM_SIZE];
374 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
375 __le64 bytenr; /* which block this node is supposed to live in */
378 /* allowed to be different from the super from here on down */
379 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
384 } __attribute__ ((__packed__));
386 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
387 sizeof(struct btrfs_header)) / \
388 sizeof(struct btrfs_key_ptr))
389 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
390 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
391 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
392 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
393 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
394 sizeof(struct btrfs_item) - \
395 BTRFS_FILE_EXTENT_INLINE_DATA_START)
396 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
397 sizeof(struct btrfs_item) -\
398 sizeof(struct btrfs_dir_item))
402 * this is a very generous portion of the super block, giving us
403 * room to translate 14 chunks with 3 stripes each.
405 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
406 #define BTRFS_LABEL_SIZE 256
409 * just in case we somehow lose the roots and are not able to mount,
410 * we store an array of the roots from previous transactions
413 #define BTRFS_NUM_BACKUP_ROOTS 4
414 struct btrfs_root_backup {
416 __le64 tree_root_gen;
419 __le64 chunk_root_gen;
422 __le64 extent_root_gen;
431 __le64 csum_root_gen;
441 u8 extent_root_level;
445 /* future and to align */
447 } __attribute__ ((__packed__));
450 * the super block basically lists the main trees of the FS
451 * it currently lacks any block count etc etc
453 struct btrfs_super_block {
454 u8 csum[BTRFS_CSUM_SIZE];
455 /* the first 4 fields must match struct btrfs_header */
456 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
457 __le64 bytenr; /* this block number */
460 /* allowed to be different from the btrfs_header from here own down */
467 /* this will help find the new super based on the log root */
468 __le64 log_root_transid;
471 __le64 root_dir_objectid;
475 __le32 __unused_leafsize;
477 __le32 sys_chunk_array_size;
478 __le64 chunk_root_generation;
480 __le64 compat_ro_flags;
481 __le64 incompat_flags;
486 struct btrfs_dev_item dev_item;
488 char label[BTRFS_LABEL_SIZE];
490 __le64 cache_generation;
491 __le64 uuid_tree_generation;
493 /* future expansion */
495 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
496 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
497 } __attribute__ ((__packed__));
500 * Compat flags that we support. If any incompat flags are set other than the
501 * ones specified below then we will fail to mount
503 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
504 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
505 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
506 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
508 * some patches floated around with a second compression method
509 * lets save that incompat here for when they do get in
510 * Note we don't actually support it, we're just reserving the
513 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
516 * older kernels tried to do bigger metadata blocks, but the
517 * code was pretty buggy. Lets not let them try anymore.
519 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
521 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
522 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
523 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
524 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
526 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
527 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
528 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
529 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
530 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
531 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
533 #define BTRFS_FEATURE_INCOMPAT_SUPP \
534 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
535 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
536 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
537 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
538 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
539 BTRFS_FEATURE_INCOMPAT_RAID56 | \
540 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
541 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
542 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
544 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
545 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
546 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
549 * A leaf is full of items. offset and size tell us where to find
550 * the item in the leaf (relative to the start of the data area)
553 struct btrfs_disk_key key;
556 } __attribute__ ((__packed__));
559 * leaves have an item area and a data area:
560 * [item0, item1....itemN] [free space] [dataN...data1, data0]
562 * The data is separate from the items to get the keys closer together
566 struct btrfs_header header;
567 struct btrfs_item items[];
568 } __attribute__ ((__packed__));
571 * all non-leaf blocks are nodes, they hold only keys and pointers to
574 struct btrfs_key_ptr {
575 struct btrfs_disk_key key;
578 } __attribute__ ((__packed__));
581 struct btrfs_header header;
582 struct btrfs_key_ptr ptrs[];
583 } __attribute__ ((__packed__));
586 * btrfs_paths remember the path taken from the root down to the leaf.
587 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
588 * to any other levels that are present.
590 * The slots array records the index of the item or block pointer
591 * used while walking the tree.
594 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
595 int slots[BTRFS_MAX_LEVEL];
596 /* if there is real range locking, this locks field will change */
597 int locks[BTRFS_MAX_LEVEL];
599 /* keep some upper locks as we walk down */
603 * set by btrfs_split_item, tells search_slot to keep all locks
604 * and to force calls to keep space in the nodes
606 unsigned int search_for_split:1;
607 unsigned int keep_locks:1;
608 unsigned int skip_locking:1;
609 unsigned int leave_spinning:1;
610 unsigned int search_commit_root:1;
611 unsigned int need_commit_sem:1;
612 unsigned int skip_release_on_error:1;
616 * items in the extent btree are used to record the objectid of the
617 * owner of the block and the number of references
620 struct btrfs_extent_item {
624 } __attribute__ ((__packed__));
626 struct btrfs_extent_item_v0 {
628 } __attribute__ ((__packed__));
630 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
631 sizeof(struct btrfs_item))
633 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
634 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
636 /* following flags only apply to tree blocks */
638 /* use full backrefs for extent pointers in the block */
639 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
642 * this flag is only used internally by scrub and may be changed at any time
643 * it is only declared here to avoid collisions
645 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
647 struct btrfs_tree_block_info {
648 struct btrfs_disk_key key;
650 } __attribute__ ((__packed__));
652 struct btrfs_extent_data_ref {
657 } __attribute__ ((__packed__));
659 struct btrfs_shared_data_ref {
661 } __attribute__ ((__packed__));
663 struct btrfs_extent_inline_ref {
666 } __attribute__ ((__packed__));
668 /* old style backrefs item */
669 struct btrfs_extent_ref_v0 {
674 } __attribute__ ((__packed__));
677 /* dev extents record free space on individual devices. The owner
678 * field points back to the chunk allocation mapping tree that allocated
679 * the extent. The chunk tree uuid field is a way to double check the owner
681 struct btrfs_dev_extent {
683 __le64 chunk_objectid;
686 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
687 } __attribute__ ((__packed__));
689 struct btrfs_inode_ref {
693 } __attribute__ ((__packed__));
695 struct btrfs_inode_extref {
696 __le64 parent_objectid;
701 } __attribute__ ((__packed__));
703 struct btrfs_timespec {
706 } __attribute__ ((__packed__));
708 enum btrfs_compression_type {
709 BTRFS_COMPRESS_NONE = 0,
710 BTRFS_COMPRESS_ZLIB = 1,
711 BTRFS_COMPRESS_LZO = 2,
712 BTRFS_COMPRESS_TYPES = 2,
713 BTRFS_COMPRESS_LAST = 3,
716 struct btrfs_inode_item {
717 /* nfs style generation number */
719 /* transid that last touched this inode */
731 /* modification sequence number for NFS */
735 * a little future expansion, for more than this we can
736 * just grow the inode item and version it
739 struct btrfs_timespec atime;
740 struct btrfs_timespec ctime;
741 struct btrfs_timespec mtime;
742 struct btrfs_timespec otime;
743 } __attribute__ ((__packed__));
745 struct btrfs_dir_log_item {
747 } __attribute__ ((__packed__));
749 struct btrfs_dir_item {
750 struct btrfs_disk_key location;
755 } __attribute__ ((__packed__));
757 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
760 * Internal in-memory flag that a subvolume has been marked for deletion but
761 * still visible as a directory
763 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
765 struct btrfs_root_item {
766 struct btrfs_inode_item inode;
772 __le64 last_snapshot;
775 struct btrfs_disk_key drop_progress;
780 * The following fields appear after subvol_uuids+subvol_times
785 * This generation number is used to test if the new fields are valid
786 * and up to date while reading the root item. Everytime the root item
787 * is written out, the "generation" field is copied into this field. If
788 * anyone ever mounted the fs with an older kernel, we will have
789 * mismatching generation values here and thus must invalidate the
790 * new fields. See btrfs_update_root and btrfs_find_last_root for
792 * the offset of generation_v2 is also used as the start for the memset
793 * when invalidating the fields.
795 __le64 generation_v2;
796 u8 uuid[BTRFS_UUID_SIZE];
797 u8 parent_uuid[BTRFS_UUID_SIZE];
798 u8 received_uuid[BTRFS_UUID_SIZE];
799 __le64 ctransid; /* updated when an inode changes */
800 __le64 otransid; /* trans when created */
801 __le64 stransid; /* trans when sent. non-zero for received subvol */
802 __le64 rtransid; /* trans when received. non-zero for received subvol */
803 struct btrfs_timespec ctime;
804 struct btrfs_timespec otime;
805 struct btrfs_timespec stime;
806 struct btrfs_timespec rtime;
807 __le64 reserved[8]; /* for future */
808 } __attribute__ ((__packed__));
811 * this is used for both forward and backward root refs
813 struct btrfs_root_ref {
817 } __attribute__ ((__packed__));
819 struct btrfs_disk_balance_args {
821 * profiles to operate on, single is denoted by
822 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
832 /* devid subset filter [pstart..pend) */
836 /* btrfs virtual address space subset filter [vstart..vend) */
841 * profile to convert to, single is denoted by
842 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
846 /* BTRFS_BALANCE_ARGS_* */
849 /* BTRFS_BALANCE_ARGS_LIMIT value */
853 } __attribute__ ((__packed__));
856 * store balance parameters to disk so that balance can be properly
857 * resumed after crash or unmount
859 struct btrfs_balance_item {
860 /* BTRFS_BALANCE_* */
863 struct btrfs_disk_balance_args data;
864 struct btrfs_disk_balance_args meta;
865 struct btrfs_disk_balance_args sys;
868 } __attribute__ ((__packed__));
870 #define BTRFS_FILE_EXTENT_INLINE 0
871 #define BTRFS_FILE_EXTENT_REG 1
872 #define BTRFS_FILE_EXTENT_PREALLOC 2
874 struct btrfs_file_extent_item {
876 * transaction id that created this extent
880 * max number of bytes to hold this extent in ram
881 * when we split a compressed extent we can't know how big
882 * each of the resulting pieces will be. So, this is
883 * an upper limit on the size of the extent in ram instead of
889 * 32 bits for the various ways we might encode the data,
890 * including compression and encryption. If any of these
891 * are set to something a given disk format doesn't understand
892 * it is treated like an incompat flag for reading and writing,
897 __le16 other_encoding; /* spare for later use */
899 /* are we inline data or a real extent? */
903 * disk space consumed by the extent, checksum blocks are included
906 * At this offset in the structure, the inline extent data start.
909 __le64 disk_num_bytes;
911 * the logical offset in file blocks (no csums)
912 * this extent record is for. This allows a file extent to point
913 * into the middle of an existing extent on disk, sharing it
914 * between two snapshots (useful if some bytes in the middle of the
915 * extent have changed
919 * the logical number of file blocks (no csums included). This
920 * always reflects the size uncompressed and without encoding.
924 } __attribute__ ((__packed__));
926 struct btrfs_csum_item {
928 } __attribute__ ((__packed__));
930 struct btrfs_dev_stats_item {
932 * grow this item struct at the end for future enhancements and keep
933 * the existing values unchanged
935 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
936 } __attribute__ ((__packed__));
938 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
939 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
940 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
941 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
942 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
943 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
944 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
946 struct btrfs_dev_replace {
947 u64 replace_state; /* see #define above */
948 u64 time_started; /* seconds since 1-Jan-1970 */
949 u64 time_stopped; /* seconds since 1-Jan-1970 */
950 atomic64_t num_write_errors;
951 atomic64_t num_uncorrectable_read_errors;
954 u64 committed_cursor_left;
955 u64 cursor_left_last_write_of_item;
958 u64 cont_reading_from_srcdev_mode; /* see #define above */
961 int item_needs_writeback;
962 struct btrfs_device *srcdev;
963 struct btrfs_device *tgtdev;
966 atomic_t nesting_level;
967 struct mutex lock_finishing_cancel_unmount;
968 struct mutex lock_management_lock;
971 struct btrfs_scrub_progress scrub_progress;
974 struct btrfs_dev_replace_item {
976 * grow this item struct at the end for future enhancements and keep
977 * the existing values unchanged
982 __le64 cont_reading_from_srcdev_mode;
984 __le64 replace_state;
987 __le64 num_write_errors;
988 __le64 num_uncorrectable_read_errors;
989 } __attribute__ ((__packed__));
991 /* different types of block groups (and chunks) */
992 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
993 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
994 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
995 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
996 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
997 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
998 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
999 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1000 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1001 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1002 BTRFS_SPACE_INFO_GLOBAL_RSV)
1004 enum btrfs_raid_types {
1015 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1016 BTRFS_BLOCK_GROUP_SYSTEM | \
1017 BTRFS_BLOCK_GROUP_METADATA)
1019 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1020 BTRFS_BLOCK_GROUP_RAID1 | \
1021 BTRFS_BLOCK_GROUP_RAID5 | \
1022 BTRFS_BLOCK_GROUP_RAID6 | \
1023 BTRFS_BLOCK_GROUP_DUP | \
1024 BTRFS_BLOCK_GROUP_RAID10)
1025 #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1026 BTRFS_BLOCK_GROUP_RAID6)
1029 * We need a bit for restriper to be able to tell when chunks of type
1030 * SINGLE are available. This "extended" profile format is used in
1031 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1032 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1033 * to avoid remappings between two formats in future.
1035 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1038 * A fake block group type that is used to communicate global block reserve
1039 * size to userspace via the SPACE_INFO ioctl.
1041 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1043 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1044 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1046 static inline u64 chunk_to_extended(u64 flags)
1048 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1049 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1053 static inline u64 extended_to_chunk(u64 flags)
1055 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1058 struct btrfs_block_group_item {
1060 __le64 chunk_objectid;
1062 } __attribute__ ((__packed__));
1065 * is subvolume quota turned on?
1067 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1069 * RESCAN is set during the initialization phase
1071 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1073 * Some qgroup entries are known to be out of date,
1074 * either because the configuration has changed in a way that
1075 * makes a rescan necessary, or because the fs has been mounted
1076 * with a non-qgroup-aware version.
1077 * Turning qouta off and on again makes it inconsistent, too.
1079 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1081 #define BTRFS_QGROUP_STATUS_VERSION 1
1083 struct btrfs_qgroup_status_item {
1086 * the generation is updated during every commit. As older
1087 * versions of btrfs are not aware of qgroups, it will be
1088 * possible to detect inconsistencies by checking the
1089 * generation on mount time
1093 /* flag definitions see above */
1097 * only used during scanning to record the progress
1098 * of the scan. It contains a logical address
1101 } __attribute__ ((__packed__));
1103 struct btrfs_qgroup_info_item {
1109 } __attribute__ ((__packed__));
1111 /* flags definition for qgroup limits */
1112 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1113 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1114 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1115 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1116 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1117 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1119 struct btrfs_qgroup_limit_item {
1121 * only updated when any of the other values change
1128 } __attribute__ ((__packed__));
1130 /* For raid type sysfs entries */
1131 struct raid_kobject {
1133 struct kobject kobj;
1136 struct btrfs_space_info {
1139 u64 total_bytes; /* total bytes in the space,
1140 this doesn't take mirrors into account */
1141 u64 bytes_used; /* total bytes used,
1142 this doesn't take mirrors into account */
1143 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1144 transaction finishes */
1145 u64 bytes_reserved; /* total bytes the allocator has reserved for
1146 current allocations */
1147 u64 bytes_may_use; /* number of bytes that may be used for
1148 delalloc/allocations */
1149 u64 bytes_readonly; /* total bytes that are read only */
1151 unsigned int full:1; /* indicates that we cannot allocate any more
1152 chunks for this space */
1153 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1155 unsigned int flush:1; /* set if we are trying to make space */
1157 unsigned int force_alloc; /* set if we need to force a chunk
1158 alloc for this space */
1160 u64 disk_used; /* total bytes used on disk */
1161 u64 disk_total; /* total bytes on disk, takes mirrors into
1167 * bytes_pinned is kept in line with what is actually pinned, as in
1168 * we've called update_block_group and dropped the bytes_used counter
1169 * and increased the bytes_pinned counter. However this means that
1170 * bytes_pinned does not reflect the bytes that will be pinned once the
1171 * delayed refs are flushed, so this counter is inc'ed everytime we call
1172 * btrfs_free_extent so it is a realtime count of what will be freed
1173 * once the transaction is committed. It will be zero'ed everytime the
1174 * transaction commits.
1176 struct percpu_counter total_bytes_pinned;
1178 struct list_head list;
1179 /* Protected by the spinlock 'lock'. */
1180 struct list_head ro_bgs;
1182 struct rw_semaphore groups_sem;
1183 /* for block groups in our same type */
1184 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1185 wait_queue_head_t wait;
1187 struct kobject kobj;
1188 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1191 #define BTRFS_BLOCK_RSV_GLOBAL 1
1192 #define BTRFS_BLOCK_RSV_DELALLOC 2
1193 #define BTRFS_BLOCK_RSV_TRANS 3
1194 #define BTRFS_BLOCK_RSV_CHUNK 4
1195 #define BTRFS_BLOCK_RSV_DELOPS 5
1196 #define BTRFS_BLOCK_RSV_EMPTY 6
1197 #define BTRFS_BLOCK_RSV_TEMP 7
1199 struct btrfs_block_rsv {
1202 struct btrfs_space_info *space_info;
1204 unsigned short full;
1205 unsigned short type;
1206 unsigned short failfast;
1210 * free clusters are used to claim free space in relatively large chunks,
1211 * allowing us to do less seeky writes. They are used for all metadata
1212 * allocations and data allocations in ssd mode.
1214 struct btrfs_free_cluster {
1216 spinlock_t refill_lock;
1217 struct rb_root root;
1219 /* largest extent in this cluster */
1222 /* first extent starting offset */
1225 struct btrfs_block_group_cache *block_group;
1227 * when a cluster is allocated from a block group, we put the
1228 * cluster onto a list in the block group so that it can
1229 * be freed before the block group is freed.
1231 struct list_head block_group_list;
1234 enum btrfs_caching_type {
1236 BTRFS_CACHE_STARTED = 1,
1237 BTRFS_CACHE_FAST = 2,
1238 BTRFS_CACHE_FINISHED = 3,
1239 BTRFS_CACHE_ERROR = 4,
1242 enum btrfs_disk_cache_state {
1243 BTRFS_DC_WRITTEN = 0,
1249 struct btrfs_caching_control {
1250 struct list_head list;
1252 wait_queue_head_t wait;
1253 struct btrfs_work work;
1254 struct btrfs_block_group_cache *block_group;
1259 struct btrfs_io_ctl {
1262 struct page **pages;
1263 struct btrfs_root *root;
1264 struct inode *inode;
1270 unsigned check_crcs:1;
1273 struct btrfs_block_group_cache {
1274 struct btrfs_key key;
1275 struct btrfs_block_group_item item;
1276 struct btrfs_fs_info *fs_info;
1277 struct inode *inode;
1285 u64 cache_generation;
1288 * It is just used for the delayed data space allocation because
1289 * only the data space allocation and the relative metadata update
1290 * can be done cross the transaction.
1292 struct rw_semaphore data_rwsem;
1294 /* for raid56, this is a full stripe, without parity */
1295 unsigned long full_stripe_len;
1298 unsigned int iref:1;
1299 unsigned int has_caching_ctl:1;
1300 unsigned int removed:1;
1302 int disk_cache_state;
1304 /* cache tracking stuff */
1306 struct btrfs_caching_control *caching_ctl;
1307 u64 last_byte_to_unpin;
1309 struct btrfs_space_info *space_info;
1311 /* free space cache stuff */
1312 struct btrfs_free_space_ctl *free_space_ctl;
1314 /* block group cache stuff */
1315 struct rb_node cache_node;
1317 /* for block groups in the same raid type */
1318 struct list_head list;
1323 /* List of struct btrfs_free_clusters for this block group.
1324 * Today it will only have one thing on it, but that may change
1326 struct list_head cluster_list;
1328 /* For delayed block group creation or deletion of empty block groups */
1329 struct list_head bg_list;
1331 /* For read-only block groups */
1332 struct list_head ro_list;
1336 /* For dirty block groups */
1337 struct list_head dirty_list;
1338 struct list_head io_list;
1340 struct btrfs_io_ctl io_ctl;
1343 /* delayed seq elem */
1345 struct list_head list;
1349 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1351 enum btrfs_orphan_cleanup_state {
1352 ORPHAN_CLEANUP_STARTED = 1,
1353 ORPHAN_CLEANUP_DONE = 2,
1356 /* used by the raid56 code to lock stripes for read/modify/write */
1357 struct btrfs_stripe_hash {
1358 struct list_head hash_list;
1359 wait_queue_head_t wait;
1363 /* used by the raid56 code to lock stripes for read/modify/write */
1364 struct btrfs_stripe_hash_table {
1365 struct list_head stripe_cache;
1366 spinlock_t cache_lock;
1368 struct btrfs_stripe_hash table[];
1371 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1373 void btrfs_init_async_reclaim_work(struct work_struct *work);
1376 struct reloc_control;
1377 struct btrfs_device;
1378 struct btrfs_fs_devices;
1379 struct btrfs_balance_control;
1380 struct btrfs_delayed_root;
1381 struct btrfs_fs_info {
1382 u8 fsid[BTRFS_FSID_SIZE];
1383 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1384 struct btrfs_root *extent_root;
1385 struct btrfs_root *tree_root;
1386 struct btrfs_root *chunk_root;
1387 struct btrfs_root *dev_root;
1388 struct btrfs_root *fs_root;
1389 struct btrfs_root *csum_root;
1390 struct btrfs_root *quota_root;
1391 struct btrfs_root *uuid_root;
1393 /* the log root tree is a directory of all the other log roots */
1394 struct btrfs_root *log_root_tree;
1396 spinlock_t fs_roots_radix_lock;
1397 struct radix_tree_root fs_roots_radix;
1399 /* block group cache stuff */
1400 spinlock_t block_group_cache_lock;
1401 u64 first_logical_byte;
1402 struct rb_root block_group_cache_tree;
1404 /* keep track of unallocated space */
1405 spinlock_t free_chunk_lock;
1406 u64 free_chunk_space;
1408 struct extent_io_tree freed_extents[2];
1409 struct extent_io_tree *pinned_extents;
1411 /* logical->physical extent mapping */
1412 struct btrfs_mapping_tree mapping_tree;
1415 * block reservation for extent, checksum, root tree and
1416 * delayed dir index item
1418 struct btrfs_block_rsv global_block_rsv;
1419 /* block reservation for delay allocation */
1420 struct btrfs_block_rsv delalloc_block_rsv;
1421 /* block reservation for metadata operations */
1422 struct btrfs_block_rsv trans_block_rsv;
1423 /* block reservation for chunk tree */
1424 struct btrfs_block_rsv chunk_block_rsv;
1425 /* block reservation for delayed operations */
1426 struct btrfs_block_rsv delayed_block_rsv;
1428 struct btrfs_block_rsv empty_block_rsv;
1431 u64 last_trans_committed;
1432 u64 avg_delayed_ref_runtime;
1435 * this is updated to the current trans every time a full commit
1436 * is required instead of the faster short fsync log commits
1438 u64 last_trans_log_full_commit;
1439 unsigned long mount_opt;
1441 * Track requests for actions that need to be done during transaction
1442 * commit (like for some mount options).
1444 unsigned long pending_changes;
1445 unsigned long compress_type:4;
1446 int commit_interval;
1448 * It is a suggestive number, the read side is safe even it gets a
1449 * wrong number because we will write out the data into a regular
1450 * extent. The write side(mount/remount) is under ->s_umount lock,
1451 * so it is also safe.
1455 * Protected by ->chunk_mutex and sb->s_umount.
1457 * The reason that we use two lock to protect it is because only
1458 * remount and mount operations can change it and these two operations
1459 * are under sb->s_umount, but the read side (chunk allocation) can not
1460 * acquire sb->s_umount or the deadlock would happen. So we use two
1461 * locks to protect it. On the write side, we must acquire two locks,
1462 * and on the read side, we just need acquire one of them.
1465 struct btrfs_transaction *running_transaction;
1466 wait_queue_head_t transaction_throttle;
1467 wait_queue_head_t transaction_wait;
1468 wait_queue_head_t transaction_blocked_wait;
1469 wait_queue_head_t async_submit_wait;
1472 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1473 * when they are updated.
1475 * Because we do not clear the flags for ever, so we needn't use
1476 * the lock on the read side.
1478 * We also needn't use the lock when we mount the fs, because
1479 * there is no other task which will update the flag.
1481 spinlock_t super_lock;
1482 struct btrfs_super_block *super_copy;
1483 struct btrfs_super_block *super_for_commit;
1484 struct block_device *__bdev;
1485 struct super_block *sb;
1486 struct inode *btree_inode;
1487 struct backing_dev_info bdi;
1488 struct mutex tree_log_mutex;
1489 struct mutex transaction_kthread_mutex;
1490 struct mutex cleaner_mutex;
1491 struct mutex chunk_mutex;
1492 struct mutex volume_mutex;
1495 * this is taken to make sure we don't set block groups ro after
1496 * the free space cache has been allocated on them
1498 struct mutex ro_block_group_mutex;
1500 /* this is used during read/modify/write to make sure
1501 * no two ios are trying to mod the same stripe at the same
1504 struct btrfs_stripe_hash_table *stripe_hash_table;
1507 * this protects the ordered operations list only while we are
1508 * processing all of the entries on it. This way we make
1509 * sure the commit code doesn't find the list temporarily empty
1510 * because another function happens to be doing non-waiting preflush
1511 * before jumping into the main commit.
1513 struct mutex ordered_operations_mutex;
1516 * Same as ordered_operations_mutex except this is for ordered extents
1517 * and not the operations.
1519 struct mutex ordered_extent_flush_mutex;
1521 struct rw_semaphore commit_root_sem;
1523 struct rw_semaphore cleanup_work_sem;
1525 struct rw_semaphore subvol_sem;
1526 struct srcu_struct subvol_srcu;
1528 spinlock_t trans_lock;
1530 * the reloc mutex goes with the trans lock, it is taken
1531 * during commit to protect us from the relocation code
1533 struct mutex reloc_mutex;
1535 struct list_head trans_list;
1536 struct list_head dead_roots;
1537 struct list_head caching_block_groups;
1539 spinlock_t delayed_iput_lock;
1540 struct list_head delayed_iputs;
1541 struct rw_semaphore delayed_iput_sem;
1543 /* this protects tree_mod_seq_list */
1544 spinlock_t tree_mod_seq_lock;
1545 atomic64_t tree_mod_seq;
1546 struct list_head tree_mod_seq_list;
1548 /* this protects tree_mod_log */
1549 rwlock_t tree_mod_log_lock;
1550 struct rb_root tree_mod_log;
1552 atomic_t nr_async_submits;
1553 atomic_t async_submit_draining;
1554 atomic_t nr_async_bios;
1555 atomic_t async_delalloc_pages;
1556 atomic_t open_ioctl_trans;
1559 * this is used to protect the following list -- ordered_roots.
1561 spinlock_t ordered_root_lock;
1564 * all fs/file tree roots in which there are data=ordered extents
1565 * pending writeback are added into this list.
1567 * these can span multiple transactions and basically include
1568 * every dirty data page that isn't from nodatacow
1570 struct list_head ordered_roots;
1572 struct mutex delalloc_root_mutex;
1573 spinlock_t delalloc_root_lock;
1574 /* all fs/file tree roots that have delalloc inodes. */
1575 struct list_head delalloc_roots;
1578 * there is a pool of worker threads for checksumming during writes
1579 * and a pool for checksumming after reads. This is because readers
1580 * can run with FS locks held, and the writers may be waiting for
1581 * those locks. We don't want ordering in the pending list to cause
1582 * deadlocks, and so the two are serviced separately.
1584 * A third pool does submit_bio to avoid deadlocking with the other
1587 struct btrfs_workqueue *workers;
1588 struct btrfs_workqueue *delalloc_workers;
1589 struct btrfs_workqueue *flush_workers;
1590 struct btrfs_workqueue *endio_workers;
1591 struct btrfs_workqueue *endio_meta_workers;
1592 struct btrfs_workqueue *endio_raid56_workers;
1593 struct btrfs_workqueue *endio_repair_workers;
1594 struct btrfs_workqueue *rmw_workers;
1595 struct btrfs_workqueue *endio_meta_write_workers;
1596 struct btrfs_workqueue *endio_write_workers;
1597 struct btrfs_workqueue *endio_freespace_worker;
1598 struct btrfs_workqueue *submit_workers;
1599 struct btrfs_workqueue *caching_workers;
1600 struct btrfs_workqueue *readahead_workers;
1603 * fixup workers take dirty pages that didn't properly go through
1604 * the cow mechanism and make them safe to write. It happens
1605 * for the sys_munmap function call path
1607 struct btrfs_workqueue *fixup_workers;
1608 struct btrfs_workqueue *delayed_workers;
1610 /* the extent workers do delayed refs on the extent allocation tree */
1611 struct btrfs_workqueue *extent_workers;
1612 struct task_struct *transaction_kthread;
1613 struct task_struct *cleaner_kthread;
1614 int thread_pool_size;
1616 struct kobject super_kobj;
1617 struct kobject *space_info_kobj;
1618 struct kobject *device_dir_kobj;
1619 struct completion kobj_unregister;
1622 int log_root_recovering;
1627 /* used to keep from writing metadata until there is a nice batch */
1628 struct percpu_counter dirty_metadata_bytes;
1629 struct percpu_counter delalloc_bytes;
1630 s32 dirty_metadata_batch;
1633 struct list_head dirty_cowonly_roots;
1635 struct btrfs_fs_devices *fs_devices;
1638 * the space_info list is almost entirely read only. It only changes
1639 * when we add a new raid type to the FS, and that happens
1640 * very rarely. RCU is used to protect it.
1642 struct list_head space_info;
1644 struct btrfs_space_info *data_sinfo;
1646 struct reloc_control *reloc_ctl;
1648 /* data_alloc_cluster is only used in ssd mode */
1649 struct btrfs_free_cluster data_alloc_cluster;
1651 /* all metadata allocations go through this cluster */
1652 struct btrfs_free_cluster meta_alloc_cluster;
1654 /* auto defrag inodes go here */
1655 spinlock_t defrag_inodes_lock;
1656 struct rb_root defrag_inodes;
1657 atomic_t defrag_running;
1659 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1660 seqlock_t profiles_lock;
1662 * these three are in extended format (availability of single
1663 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1664 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1666 u64 avail_data_alloc_bits;
1667 u64 avail_metadata_alloc_bits;
1668 u64 avail_system_alloc_bits;
1670 /* restriper state */
1671 spinlock_t balance_lock;
1672 struct mutex balance_mutex;
1673 atomic_t balance_running;
1674 atomic_t balance_pause_req;
1675 atomic_t balance_cancel_req;
1676 struct btrfs_balance_control *balance_ctl;
1677 wait_queue_head_t balance_wait_q;
1679 unsigned data_chunk_allocations;
1680 unsigned metadata_ratio;
1684 /* private scrub information */
1685 struct mutex scrub_lock;
1686 atomic_t scrubs_running;
1687 atomic_t scrub_pause_req;
1688 atomic_t scrubs_paused;
1689 atomic_t scrub_cancel_req;
1690 wait_queue_head_t scrub_pause_wait;
1691 int scrub_workers_refcnt;
1692 struct btrfs_workqueue *scrub_workers;
1693 struct btrfs_workqueue *scrub_wr_completion_workers;
1694 struct btrfs_workqueue *scrub_nocow_workers;
1696 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1697 u32 check_integrity_print_mask;
1702 unsigned int quota_enabled:1;
1705 * quota_enabled only changes state after a commit. This holds the
1708 unsigned int pending_quota_state:1;
1710 /* is qgroup tracking in a consistent state? */
1713 /* holds configuration and tracking. Protected by qgroup_lock */
1714 struct rb_root qgroup_tree;
1715 struct rb_root qgroup_op_tree;
1716 spinlock_t qgroup_lock;
1717 spinlock_t qgroup_op_lock;
1718 atomic_t qgroup_op_seq;
1721 * used to avoid frequently calling ulist_alloc()/ulist_free()
1722 * when doing qgroup accounting, it must be protected by qgroup_lock.
1724 struct ulist *qgroup_ulist;
1726 /* protect user change for quota operations */
1727 struct mutex qgroup_ioctl_lock;
1729 /* list of dirty qgroups to be written at next commit */
1730 struct list_head dirty_qgroups;
1732 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1735 /* qgroup rescan items */
1736 struct mutex qgroup_rescan_lock; /* protects the progress item */
1737 struct btrfs_key qgroup_rescan_progress;
1738 struct btrfs_workqueue *qgroup_rescan_workers;
1739 struct completion qgroup_rescan_completion;
1740 struct btrfs_work qgroup_rescan_work;
1742 /* filesystem state */
1743 unsigned long fs_state;
1745 struct btrfs_delayed_root *delayed_root;
1747 /* readahead tree */
1748 spinlock_t reada_lock;
1749 struct radix_tree_root reada_tree;
1751 /* Extent buffer radix tree */
1752 spinlock_t buffer_lock;
1753 struct radix_tree_root buffer_radix;
1755 /* next backup root to be overwritten */
1756 int backup_root_index;
1758 int num_tolerated_disk_barrier_failures;
1760 /* device replace state */
1761 struct btrfs_dev_replace dev_replace;
1763 atomic_t mutually_exclusive_operation_running;
1765 struct percpu_counter bio_counter;
1766 wait_queue_head_t replace_wait;
1768 struct semaphore uuid_tree_rescan_sem;
1769 unsigned int update_uuid_tree_gen:1;
1771 /* Used to reclaim the metadata space in the background. */
1772 struct work_struct async_reclaim_work;
1774 spinlock_t unused_bgs_lock;
1775 struct list_head unused_bgs;
1776 struct mutex unused_bg_unpin_mutex;
1778 /* For btrfs to record security options */
1779 struct security_mnt_opts security_opts;
1782 * Chunks that can't be freed yet (under a trim/discard operation)
1783 * and will be latter freed. Protected by fs_info->chunk_mutex.
1785 struct list_head pinned_chunks;
1788 struct btrfs_subvolume_writers {
1789 struct percpu_counter counter;
1790 wait_queue_head_t wait;
1794 * The state of btrfs root
1797 * btrfs_record_root_in_trans is a multi-step process,
1798 * and it can race with the balancing code. But the
1799 * race is very small, and only the first time the root
1800 * is added to each transaction. So IN_TRANS_SETUP
1801 * is used to tell us when more checks are required
1803 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1804 #define BTRFS_ROOT_REF_COWS 1
1805 #define BTRFS_ROOT_TRACK_DIRTY 2
1806 #define BTRFS_ROOT_IN_RADIX 3
1807 #define BTRFS_ROOT_DUMMY_ROOT 4
1808 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1809 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1810 #define BTRFS_ROOT_FORCE_COW 7
1811 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1812 #define BTRFS_ROOT_DIRTY 9
1815 * in ram representation of the tree. extent_root is used for all allocations
1816 * and for the extent tree extent_root root.
1819 struct extent_buffer *node;
1821 struct extent_buffer *commit_root;
1822 struct btrfs_root *log_root;
1823 struct btrfs_root *reloc_root;
1825 unsigned long state;
1826 struct btrfs_root_item root_item;
1827 struct btrfs_key root_key;
1828 struct btrfs_fs_info *fs_info;
1829 struct extent_io_tree dirty_log_pages;
1831 struct mutex objectid_mutex;
1833 spinlock_t accounting_lock;
1834 struct btrfs_block_rsv *block_rsv;
1836 /* free ino cache stuff */
1837 struct btrfs_free_space_ctl *free_ino_ctl;
1838 enum btrfs_caching_type ino_cache_state;
1839 spinlock_t ino_cache_lock;
1840 wait_queue_head_t ino_cache_wait;
1841 struct btrfs_free_space_ctl *free_ino_pinned;
1842 u64 ino_cache_progress;
1843 struct inode *ino_cache_inode;
1845 struct mutex log_mutex;
1846 wait_queue_head_t log_writer_wait;
1847 wait_queue_head_t log_commit_wait[2];
1848 struct list_head log_ctxs[2];
1849 atomic_t log_writers;
1850 atomic_t log_commit[2];
1853 /* No matter the commit succeeds or not*/
1854 int log_transid_committed;
1855 /* Just be updated when the commit succeeds. */
1856 int last_log_commit;
1857 pid_t log_start_pid;
1862 /* data allocations are done in sectorsize units */
1865 /* node allocations are done in nodesize units */
1872 u64 highest_objectid;
1874 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1877 u64 defrag_trans_start;
1878 struct btrfs_key defrag_progress;
1879 struct btrfs_key defrag_max;
1882 /* the dirty list is only used by non-reference counted roots */
1883 struct list_head dirty_list;
1885 struct list_head root_list;
1887 spinlock_t log_extents_lock[2];
1888 struct list_head logged_list[2];
1890 spinlock_t orphan_lock;
1891 atomic_t orphan_inodes;
1892 struct btrfs_block_rsv *orphan_block_rsv;
1893 int orphan_cleanup_state;
1895 spinlock_t inode_lock;
1896 /* red-black tree that keeps track of in-memory inodes */
1897 struct rb_root inode_tree;
1900 * radix tree that keeps track of delayed nodes of every inode,
1901 * protected by inode_lock
1903 struct radix_tree_root delayed_nodes_tree;
1905 * right now this just gets used so that a root has its own devid
1906 * for stat. It may be used for more later
1910 spinlock_t root_item_lock;
1913 struct mutex delalloc_mutex;
1914 spinlock_t delalloc_lock;
1916 * all of the inodes that have delalloc bytes. It is possible for
1917 * this list to be empty even when there is still dirty data=ordered
1918 * extents waiting to finish IO.
1920 struct list_head delalloc_inodes;
1921 struct list_head delalloc_root;
1922 u64 nr_delalloc_inodes;
1924 struct mutex ordered_extent_mutex;
1926 * this is used by the balancing code to wait for all the pending
1929 spinlock_t ordered_extent_lock;
1932 * all of the data=ordered extents pending writeback
1933 * these can span multiple transactions and basically include
1934 * every dirty data page that isn't from nodatacow
1936 struct list_head ordered_extents;
1937 struct list_head ordered_root;
1938 u64 nr_ordered_extents;
1941 * Number of currently running SEND ioctls to prevent
1942 * manipulation with the read-only status via SUBVOL_SETFLAGS
1944 int send_in_progress;
1945 struct btrfs_subvolume_writers *subv_writers;
1946 atomic_t will_be_snapshoted;
1949 struct btrfs_ioctl_defrag_range_args {
1950 /* start of the defrag operation */
1953 /* number of bytes to defrag, use (u64)-1 to say all */
1957 * flags for the operation, which can include turning
1958 * on compression for this one defrag
1963 * any extent bigger than this will be considered
1964 * already defragged. Use 0 to take the kernel default
1965 * Use 1 to say every single extent must be rewritten
1967 __u32 extent_thresh;
1970 * which compression method to use if turning on compression
1971 * for this defrag operation. If unspecified, zlib will
1974 __u32 compress_type;
1976 /* spare for later */
1982 * inode items have the data typically returned from stat and store other
1983 * info about object characteristics. There is one for every file and dir in
1986 #define BTRFS_INODE_ITEM_KEY 1
1987 #define BTRFS_INODE_REF_KEY 12
1988 #define BTRFS_INODE_EXTREF_KEY 13
1989 #define BTRFS_XATTR_ITEM_KEY 24
1990 #define BTRFS_ORPHAN_ITEM_KEY 48
1991 /* reserve 2-15 close to the inode for later flexibility */
1994 * dir items are the name -> inode pointers in a directory. There is one
1995 * for every name in a directory.
1997 #define BTRFS_DIR_LOG_ITEM_KEY 60
1998 #define BTRFS_DIR_LOG_INDEX_KEY 72
1999 #define BTRFS_DIR_ITEM_KEY 84
2000 #define BTRFS_DIR_INDEX_KEY 96
2002 * extent data is for file data
2004 #define BTRFS_EXTENT_DATA_KEY 108
2007 * extent csums are stored in a separate tree and hold csums for
2008 * an entire extent on disk.
2010 #define BTRFS_EXTENT_CSUM_KEY 128
2013 * root items point to tree roots. They are typically in the root
2014 * tree used by the super block to find all the other trees
2016 #define BTRFS_ROOT_ITEM_KEY 132
2019 * root backrefs tie subvols and snapshots to the directory entries that
2022 #define BTRFS_ROOT_BACKREF_KEY 144
2025 * root refs make a fast index for listing all of the snapshots and
2026 * subvolumes referenced by a given root. They point directly to the
2027 * directory item in the root that references the subvol
2029 #define BTRFS_ROOT_REF_KEY 156
2032 * extent items are in the extent map tree. These record which blocks
2033 * are used, and how many references there are to each block
2035 #define BTRFS_EXTENT_ITEM_KEY 168
2038 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2039 * the length, so we save the level in key->offset instead of the length.
2041 #define BTRFS_METADATA_ITEM_KEY 169
2043 #define BTRFS_TREE_BLOCK_REF_KEY 176
2045 #define BTRFS_EXTENT_DATA_REF_KEY 178
2047 #define BTRFS_EXTENT_REF_V0_KEY 180
2049 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2051 #define BTRFS_SHARED_DATA_REF_KEY 184
2054 * block groups give us hints into the extent allocation trees. Which
2055 * blocks are free etc etc
2057 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2059 #define BTRFS_DEV_EXTENT_KEY 204
2060 #define BTRFS_DEV_ITEM_KEY 216
2061 #define BTRFS_CHUNK_ITEM_KEY 228
2064 * Records the overall state of the qgroups.
2065 * There's only one instance of this key present,
2066 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2068 #define BTRFS_QGROUP_STATUS_KEY 240
2070 * Records the currently used space of the qgroup.
2071 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2073 #define BTRFS_QGROUP_INFO_KEY 242
2075 * Contains the user configured limits for the qgroup.
2076 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2078 #define BTRFS_QGROUP_LIMIT_KEY 244
2080 * Records the child-parent relationship of qgroups. For
2081 * each relation, 2 keys are present:
2082 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2083 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2085 #define BTRFS_QGROUP_RELATION_KEY 246
2087 #define BTRFS_BALANCE_ITEM_KEY 248
2090 * Persistantly stores the io stats in the device tree.
2091 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2093 #define BTRFS_DEV_STATS_KEY 249
2096 * Persistantly stores the device replace state in the device tree.
2097 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2099 #define BTRFS_DEV_REPLACE_KEY 250
2102 * Stores items that allow to quickly map UUIDs to something else.
2103 * These items are part of the filesystem UUID tree.
2104 * The key is built like this:
2105 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2107 #if BTRFS_UUID_SIZE != 16
2108 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2110 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2111 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2112 * received subvols */
2115 * string items are for debugging. They just store a short string of
2118 #define BTRFS_STRING_ITEM_KEY 253
2121 * Flags for mount options.
2123 * Note: don't forget to add new options to btrfs_show_options()
2125 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2126 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2127 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2128 #define BTRFS_MOUNT_SSD (1 << 3)
2129 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2130 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2131 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2132 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2133 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2134 #define BTRFS_MOUNT_NOSSD (1 << 9)
2135 #define BTRFS_MOUNT_DISCARD (1 << 10)
2136 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2137 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2138 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2139 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2140 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2141 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2142 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2143 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2144 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2145 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2146 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2147 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2148 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2150 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2151 #define BTRFS_DEFAULT_MAX_INLINE (8192)
2153 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2154 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2155 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2156 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2159 #define btrfs_set_and_info(root, opt, fmt, args...) \
2161 if (!btrfs_test_opt(root, opt)) \
2162 btrfs_info(root->fs_info, fmt, ##args); \
2163 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2166 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2168 if (btrfs_test_opt(root, opt)) \
2169 btrfs_info(root->fs_info, fmt, ##args); \
2170 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2174 * Requests for changes that need to be done during transaction commit.
2176 * Internal mount options that are used for special handling of the real
2177 * mount options (eg. cannot be set during remount and have to be set during
2178 * transaction commit)
2181 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2182 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2183 #define BTRFS_PENDING_COMMIT (2)
2185 #define btrfs_test_pending(info, opt) \
2186 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2187 #define btrfs_set_pending(info, opt) \
2188 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2189 #define btrfs_clear_pending(info, opt) \
2190 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2193 * Helpers for setting pending mount option changes.
2195 * Expects corresponding macros
2196 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2198 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2200 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2201 btrfs_info((info), fmt, ##args); \
2202 btrfs_set_pending((info), SET_##opt); \
2203 btrfs_clear_pending((info), CLEAR_##opt); \
2207 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2209 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2210 btrfs_info((info), fmt, ##args); \
2211 btrfs_set_pending((info), CLEAR_##opt); \
2212 btrfs_clear_pending((info), SET_##opt); \
2219 #define BTRFS_INODE_NODATASUM (1 << 0)
2220 #define BTRFS_INODE_NODATACOW (1 << 1)
2221 #define BTRFS_INODE_READONLY (1 << 2)
2222 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2223 #define BTRFS_INODE_PREALLOC (1 << 4)
2224 #define BTRFS_INODE_SYNC (1 << 5)
2225 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2226 #define BTRFS_INODE_APPEND (1 << 7)
2227 #define BTRFS_INODE_NODUMP (1 << 8)
2228 #define BTRFS_INODE_NOATIME (1 << 9)
2229 #define BTRFS_INODE_DIRSYNC (1 << 10)
2230 #define BTRFS_INODE_COMPRESS (1 << 11)
2232 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2234 struct btrfs_map_token {
2235 struct extent_buffer *eb;
2237 unsigned long offset;
2240 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2242 token->kaddr = NULL;
2245 /* some macros to generate set/get funcs for the struct fields. This
2246 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2249 #define le8_to_cpu(v) (v)
2250 #define cpu_to_le8(v) (v)
2253 #define read_eb_member(eb, ptr, type, member, result) ( \
2254 read_extent_buffer(eb, (char *)(result), \
2255 ((unsigned long)(ptr)) + \
2256 offsetof(type, member), \
2257 sizeof(((type *)0)->member)))
2259 #define write_eb_member(eb, ptr, type, member, result) ( \
2260 write_extent_buffer(eb, (char *)(result), \
2261 ((unsigned long)(ptr)) + \
2262 offsetof(type, member), \
2263 sizeof(((type *)0)->member)))
2265 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2266 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2267 unsigned long off, \
2268 struct btrfs_map_token *token); \
2269 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2270 unsigned long off, u##bits val, \
2271 struct btrfs_map_token *token); \
2272 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2273 unsigned long off) \
2275 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2277 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2278 unsigned long off, u##bits val) \
2280 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2283 DECLARE_BTRFS_SETGET_BITS(8)
2284 DECLARE_BTRFS_SETGET_BITS(16)
2285 DECLARE_BTRFS_SETGET_BITS(32)
2286 DECLARE_BTRFS_SETGET_BITS(64)
2288 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2289 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2291 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2292 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2294 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2297 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2298 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2300 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2301 struct btrfs_map_token *token) \
2303 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2304 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2306 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2307 type *s, u##bits val, \
2308 struct btrfs_map_token *token) \
2310 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2311 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2314 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2315 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2317 type *p = page_address(eb->pages[0]); \
2318 u##bits res = le##bits##_to_cpu(p->member); \
2321 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2324 type *p = page_address(eb->pages[0]); \
2325 p->member = cpu_to_le##bits(val); \
2328 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2329 static inline u##bits btrfs_##name(type *s) \
2331 return le##bits##_to_cpu(s->member); \
2333 static inline void btrfs_set_##name(type *s, u##bits val) \
2335 s->member = cpu_to_le##bits(val); \
2338 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2339 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2340 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2341 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2342 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2343 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2345 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2346 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2347 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2348 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2349 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2350 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2352 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2353 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2355 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2357 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2359 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2361 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2363 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2364 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2366 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2368 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2370 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2373 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2375 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2378 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2380 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2383 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2384 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2385 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2386 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2387 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2388 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2389 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2390 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2391 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2392 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2393 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2395 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2397 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2400 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2401 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2402 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2404 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2406 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2408 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2410 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2411 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2413 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2415 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2416 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2418 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2421 unsigned long offset = (unsigned long)c;
2422 offset += offsetof(struct btrfs_chunk, stripe);
2423 offset += nr * sizeof(struct btrfs_stripe);
2424 return (struct btrfs_stripe *)offset;
2427 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2429 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2432 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2433 struct btrfs_chunk *c, int nr)
2435 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2438 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2439 struct btrfs_chunk *c, int nr)
2441 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2444 /* struct btrfs_block_group_item */
2445 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2447 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2449 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2450 struct btrfs_block_group_item, chunk_objectid, 64);
2452 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2453 struct btrfs_block_group_item, chunk_objectid, 64);
2454 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2455 struct btrfs_block_group_item, flags, 64);
2456 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2457 struct btrfs_block_group_item, flags, 64);
2459 /* struct btrfs_inode_ref */
2460 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2461 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2463 /* struct btrfs_inode_extref */
2464 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2465 parent_objectid, 64);
2466 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2468 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2470 /* struct btrfs_inode_item */
2471 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2472 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2473 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2474 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2475 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2476 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2477 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2478 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2479 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2480 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2481 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2482 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2483 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2485 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2487 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2489 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2490 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2492 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2494 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2495 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2496 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2497 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2498 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2499 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2500 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2501 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2502 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2503 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2505 /* struct btrfs_dev_extent */
2506 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2508 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2509 chunk_objectid, 64);
2510 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2512 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2514 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2516 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2517 return (unsigned long)dev + ptr;
2520 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2521 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2523 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2525 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2528 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2530 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2531 struct btrfs_tree_block_info *item,
2532 struct btrfs_disk_key *key)
2534 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2537 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2538 struct btrfs_tree_block_info *item,
2539 struct btrfs_disk_key *key)
2541 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2544 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2546 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2548 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2550 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2553 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2556 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2558 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2561 static inline u32 btrfs_extent_inline_ref_size(int type)
2563 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2564 type == BTRFS_SHARED_BLOCK_REF_KEY)
2565 return sizeof(struct btrfs_extent_inline_ref);
2566 if (type == BTRFS_SHARED_DATA_REF_KEY)
2567 return sizeof(struct btrfs_shared_data_ref) +
2568 sizeof(struct btrfs_extent_inline_ref);
2569 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2570 return sizeof(struct btrfs_extent_data_ref) +
2571 offsetof(struct btrfs_extent_inline_ref, offset);
2576 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2577 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2579 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2580 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2582 /* struct btrfs_node */
2583 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2584 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2585 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2587 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2590 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2593 ptr = offsetof(struct btrfs_node, ptrs) +
2594 sizeof(struct btrfs_key_ptr) * nr;
2595 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2598 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2602 ptr = offsetof(struct btrfs_node, ptrs) +
2603 sizeof(struct btrfs_key_ptr) * nr;
2604 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2607 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2610 ptr = offsetof(struct btrfs_node, ptrs) +
2611 sizeof(struct btrfs_key_ptr) * nr;
2612 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2615 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2619 ptr = offsetof(struct btrfs_node, ptrs) +
2620 sizeof(struct btrfs_key_ptr) * nr;
2621 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2624 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2626 return offsetof(struct btrfs_node, ptrs) +
2627 sizeof(struct btrfs_key_ptr) * nr;
2630 void btrfs_node_key(struct extent_buffer *eb,
2631 struct btrfs_disk_key *disk_key, int nr);
2633 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2634 struct btrfs_disk_key *disk_key, int nr)
2637 ptr = btrfs_node_key_ptr_offset(nr);
2638 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2639 struct btrfs_key_ptr, key, disk_key);
2642 /* struct btrfs_item */
2643 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2644 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2645 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2646 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2648 static inline unsigned long btrfs_item_nr_offset(int nr)
2650 return offsetof(struct btrfs_leaf, items) +
2651 sizeof(struct btrfs_item) * nr;
2654 static inline struct btrfs_item *btrfs_item_nr(int nr)
2656 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2659 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2660 struct btrfs_item *item)
2662 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2665 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2667 return btrfs_item_end(eb, btrfs_item_nr(nr));
2670 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2672 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2675 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2677 return btrfs_item_size(eb, btrfs_item_nr(nr));
2680 static inline void btrfs_item_key(struct extent_buffer *eb,
2681 struct btrfs_disk_key *disk_key, int nr)
2683 struct btrfs_item *item = btrfs_item_nr(nr);
2684 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2687 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2688 struct btrfs_disk_key *disk_key, int nr)
2690 struct btrfs_item *item = btrfs_item_nr(nr);
2691 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2694 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2697 * struct btrfs_root_ref
2699 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2700 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2701 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2703 /* struct btrfs_dir_item */
2704 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2705 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2706 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2707 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2708 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2709 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2711 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2713 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2716 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2717 struct btrfs_dir_item *item,
2718 struct btrfs_disk_key *key)
2720 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2723 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2724 struct btrfs_dir_item *item,
2725 struct btrfs_disk_key *key)
2727 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2730 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2732 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2734 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2737 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2738 struct btrfs_free_space_header *h,
2739 struct btrfs_disk_key *key)
2741 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2744 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2745 struct btrfs_free_space_header *h,
2746 struct btrfs_disk_key *key)
2748 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2751 /* struct btrfs_disk_key */
2752 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2754 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2755 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2757 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2758 struct btrfs_disk_key *disk)
2760 cpu->offset = le64_to_cpu(disk->offset);
2761 cpu->type = disk->type;
2762 cpu->objectid = le64_to_cpu(disk->objectid);
2765 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2766 struct btrfs_key *cpu)
2768 disk->offset = cpu_to_le64(cpu->offset);
2769 disk->type = cpu->type;
2770 disk->objectid = cpu_to_le64(cpu->objectid);
2773 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2774 struct btrfs_key *key, int nr)
2776 struct btrfs_disk_key disk_key;
2777 btrfs_node_key(eb, &disk_key, nr);
2778 btrfs_disk_key_to_cpu(key, &disk_key);
2781 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2782 struct btrfs_key *key, int nr)
2784 struct btrfs_disk_key disk_key;
2785 btrfs_item_key(eb, &disk_key, nr);
2786 btrfs_disk_key_to_cpu(key, &disk_key);
2789 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2790 struct btrfs_dir_item *item,
2791 struct btrfs_key *key)
2793 struct btrfs_disk_key disk_key;
2794 btrfs_dir_item_key(eb, item, &disk_key);
2795 btrfs_disk_key_to_cpu(key, &disk_key);
2799 static inline u8 btrfs_key_type(struct btrfs_key *key)
2804 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2809 /* struct btrfs_header */
2810 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2811 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2813 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2814 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2815 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2816 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2817 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2819 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2820 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2822 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2824 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2826 return (btrfs_header_flags(eb) & flag) == flag;
2829 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2831 u64 flags = btrfs_header_flags(eb);
2832 btrfs_set_header_flags(eb, flags | flag);
2833 return (flags & flag) == flag;
2836 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2838 u64 flags = btrfs_header_flags(eb);
2839 btrfs_set_header_flags(eb, flags & ~flag);
2840 return (flags & flag) == flag;
2843 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2845 u64 flags = btrfs_header_flags(eb);
2846 return flags >> BTRFS_BACKREF_REV_SHIFT;
2849 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2852 u64 flags = btrfs_header_flags(eb);
2853 flags &= ~BTRFS_BACKREF_REV_MASK;
2854 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2855 btrfs_set_header_flags(eb, flags);
2858 static inline unsigned long btrfs_header_fsid(void)
2860 return offsetof(struct btrfs_header, fsid);
2863 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2865 return offsetof(struct btrfs_header, chunk_tree_uuid);
2868 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2870 return btrfs_header_level(eb) == 0;
2873 /* struct btrfs_root_item */
2874 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2876 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2877 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2878 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2880 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2882 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2883 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2884 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2885 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2886 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2887 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2888 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2889 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2891 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2893 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2895 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2897 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2899 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2902 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2904 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2907 static inline bool btrfs_root_dead(struct btrfs_root *root)
2909 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2912 /* struct btrfs_root_backup */
2913 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2915 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2917 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2918 tree_root_level, 8);
2920 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2922 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2923 chunk_root_gen, 64);
2924 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2925 chunk_root_level, 8);
2927 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2929 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2930 extent_root_gen, 64);
2931 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2932 extent_root_level, 8);
2934 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2936 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2938 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2941 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2943 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2945 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2948 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2950 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2952 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2953 csum_root_level, 8);
2954 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2956 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2958 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2961 /* struct btrfs_balance_item */
2962 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2964 static inline void btrfs_balance_data(struct extent_buffer *eb,
2965 struct btrfs_balance_item *bi,
2966 struct btrfs_disk_balance_args *ba)
2968 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2971 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2972 struct btrfs_balance_item *bi,
2973 struct btrfs_disk_balance_args *ba)
2975 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2978 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2979 struct btrfs_balance_item *bi,
2980 struct btrfs_disk_balance_args *ba)
2982 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2985 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2986 struct btrfs_balance_item *bi,
2987 struct btrfs_disk_balance_args *ba)
2989 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2992 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2993 struct btrfs_balance_item *bi,
2994 struct btrfs_disk_balance_args *ba)
2996 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2999 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
3000 struct btrfs_balance_item *bi,
3001 struct btrfs_disk_balance_args *ba)
3003 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3007 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3008 struct btrfs_disk_balance_args *disk)
3010 memset(cpu, 0, sizeof(*cpu));
3012 cpu->profiles = le64_to_cpu(disk->profiles);
3013 cpu->usage = le64_to_cpu(disk->usage);
3014 cpu->devid = le64_to_cpu(disk->devid);
3015 cpu->pstart = le64_to_cpu(disk->pstart);
3016 cpu->pend = le64_to_cpu(disk->pend);
3017 cpu->vstart = le64_to_cpu(disk->vstart);
3018 cpu->vend = le64_to_cpu(disk->vend);
3019 cpu->target = le64_to_cpu(disk->target);
3020 cpu->flags = le64_to_cpu(disk->flags);
3021 cpu->limit = le64_to_cpu(disk->limit);
3025 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3026 struct btrfs_balance_args *cpu)
3028 memset(disk, 0, sizeof(*disk));
3030 disk->profiles = cpu_to_le64(cpu->profiles);
3031 disk->usage = cpu_to_le64(cpu->usage);
3032 disk->devid = cpu_to_le64(cpu->devid);
3033 disk->pstart = cpu_to_le64(cpu->pstart);
3034 disk->pend = cpu_to_le64(cpu->pend);
3035 disk->vstart = cpu_to_le64(cpu->vstart);
3036 disk->vend = cpu_to_le64(cpu->vend);
3037 disk->target = cpu_to_le64(cpu->target);
3038 disk->flags = cpu_to_le64(cpu->flags);
3039 disk->limit = cpu_to_le64(cpu->limit);
3042 /* struct btrfs_super_block */
3043 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3044 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3045 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3047 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3048 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3049 struct btrfs_super_block, sys_chunk_array_size, 32);
3050 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3051 struct btrfs_super_block, chunk_root_generation, 64);
3052 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3054 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3056 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
3057 chunk_root_level, 8);
3058 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3060 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3061 log_root_transid, 64);
3062 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3064 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3066 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3068 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3070 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3072 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3074 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3075 root_dir_objectid, 64);
3076 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3078 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3080 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
3081 compat_ro_flags, 64);
3082 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3083 incompat_flags, 64);
3084 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3086 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3087 cache_generation, 64);
3088 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3089 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3090 uuid_tree_generation, 64);
3092 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3094 u16 t = btrfs_super_csum_type(s);
3096 * csum type is validated at mount time
3098 return btrfs_csum_sizes[t];
3101 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3103 return offsetof(struct btrfs_leaf, items);
3106 /* struct btrfs_file_extent_item */
3107 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3108 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3109 struct btrfs_file_extent_item, disk_bytenr, 64);
3110 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3111 struct btrfs_file_extent_item, offset, 64);
3112 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3113 struct btrfs_file_extent_item, generation, 64);
3114 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3115 struct btrfs_file_extent_item, num_bytes, 64);
3116 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3117 struct btrfs_file_extent_item, disk_num_bytes, 64);
3118 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3119 struct btrfs_file_extent_item, compression, 8);
3121 static inline unsigned long
3122 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3124 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3127 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3129 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3132 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3134 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3136 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3137 disk_num_bytes, 64);
3138 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3140 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3142 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3144 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3146 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3148 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3149 other_encoding, 16);
3152 * this returns the number of bytes used by the item on disk, minus the
3153 * size of any extent headers. If a file is compressed on disk, this is
3154 * the compressed size
3156 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3157 struct btrfs_item *e)
3159 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
3162 /* this returns the number of file bytes represented by the inline item.
3163 * If an item is compressed, this is the uncompressed size
3165 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3167 struct btrfs_file_extent_item *fi)
3169 struct btrfs_map_token token;
3171 btrfs_init_map_token(&token);
3173 * return the space used on disk if this item isn't
3174 * compressed or encoded
3176 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3177 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3178 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3179 return btrfs_file_extent_inline_item_len(eb,
3180 btrfs_item_nr(slot));
3183 /* otherwise use the ram bytes field */
3184 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3188 /* btrfs_dev_stats_item */
3189 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3190 struct btrfs_dev_stats_item *ptr,
3195 read_extent_buffer(eb, &val,
3196 offsetof(struct btrfs_dev_stats_item, values) +
3197 ((unsigned long)ptr) + (index * sizeof(u64)),
3202 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3203 struct btrfs_dev_stats_item *ptr,
3206 write_extent_buffer(eb, &val,
3207 offsetof(struct btrfs_dev_stats_item, values) +
3208 ((unsigned long)ptr) + (index * sizeof(u64)),
3212 /* btrfs_qgroup_status_item */
3213 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3215 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3217 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3219 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3222 /* btrfs_qgroup_info_item */
3223 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3225 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3226 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3228 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3229 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3232 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3233 struct btrfs_qgroup_info_item, generation, 64);
3234 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3236 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3237 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3238 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3240 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3241 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3243 /* btrfs_qgroup_limit_item */
3244 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3246 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3248 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3250 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3252 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3255 /* btrfs_dev_replace_item */
3256 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3257 struct btrfs_dev_replace_item, src_devid, 64);
3258 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3259 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3261 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3263 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3265 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3267 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3268 num_write_errors, 64);
3269 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3270 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3272 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3274 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3277 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3278 struct btrfs_dev_replace_item, src_devid, 64);
3279 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3280 struct btrfs_dev_replace_item,
3281 cont_reading_from_srcdev_mode, 64);
3282 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3283 struct btrfs_dev_replace_item, replace_state, 64);
3284 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3285 struct btrfs_dev_replace_item, time_started, 64);
3286 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3287 struct btrfs_dev_replace_item, time_stopped, 64);
3288 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3289 struct btrfs_dev_replace_item, num_write_errors, 64);
3290 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3291 struct btrfs_dev_replace_item,
3292 num_uncorrectable_read_errors, 64);
3293 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3294 struct btrfs_dev_replace_item, cursor_left, 64);
3295 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3296 struct btrfs_dev_replace_item, cursor_right, 64);
3298 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3300 return sb->s_fs_info;
3303 /* helper function to cast into the data area of the leaf. */
3304 #define btrfs_item_ptr(leaf, slot, type) \
3305 ((type *)(btrfs_leaf_data(leaf) + \
3306 btrfs_item_offset_nr(leaf, slot)))
3308 #define btrfs_item_ptr_offset(leaf, slot) \
3309 ((unsigned long)(btrfs_leaf_data(leaf) + \
3310 btrfs_item_offset_nr(leaf, slot)))
3312 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3314 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3315 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3318 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3320 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3325 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
3327 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3330 return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3335 * Doing a truncate won't result in new nodes or leaves, just what we need for
3338 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3341 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3344 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3345 struct btrfs_root *root);
3346 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3347 struct btrfs_root *root);
3348 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3349 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3350 struct btrfs_root *root, unsigned long count);
3351 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3352 unsigned long count, int wait);
3353 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3354 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3355 struct btrfs_root *root, u64 bytenr,
3356 u64 offset, int metadata, u64 *refs, u64 *flags);
3357 int btrfs_pin_extent(struct btrfs_root *root,
3358 u64 bytenr, u64 num, int reserved);
3359 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3360 u64 bytenr, u64 num_bytes);
3361 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3362 struct extent_buffer *eb);
3363 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3364 struct btrfs_root *root,
3365 u64 objectid, u64 offset, u64 bytenr);
3366 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3367 struct btrfs_fs_info *info,
3369 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3370 int get_block_group_index(struct btrfs_block_group_cache *cache);
3371 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3372 struct btrfs_root *root, u64 parent,
3374 struct btrfs_disk_key *key, int level,
3375 u64 hint, u64 empty_size);
3376 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3377 struct btrfs_root *root,
3378 struct extent_buffer *buf,
3379 u64 parent, int last_ref);
3380 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3381 struct btrfs_root *root,
3382 u64 root_objectid, u64 owner,
3383 u64 offset, struct btrfs_key *ins);
3384 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3385 struct btrfs_root *root,
3386 u64 root_objectid, u64 owner, u64 offset,
3387 struct btrfs_key *ins);
3388 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3389 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3390 struct btrfs_key *ins, int is_data, int delalloc);
3391 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3392 struct extent_buffer *buf, int full_backref);
3393 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3394 struct extent_buffer *buf, int full_backref);
3395 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3396 struct btrfs_root *root,
3397 u64 bytenr, u64 num_bytes, u64 flags,
3398 int level, int is_data);
3399 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3400 struct btrfs_root *root,
3401 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3402 u64 owner, u64 offset, int no_quota);
3404 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3406 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3407 u64 start, u64 len);
3408 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3409 struct btrfs_root *root);
3410 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3411 struct btrfs_root *root);
3412 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3413 struct btrfs_root *root,
3414 u64 bytenr, u64 num_bytes, u64 parent,
3415 u64 root_objectid, u64 owner, u64 offset, int no_quota);
3417 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
3418 struct btrfs_root *root);
3419 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3420 struct btrfs_root *root);
3421 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
3422 struct btrfs_root *root);
3423 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3424 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3425 int btrfs_read_block_groups(struct btrfs_root *root);
3426 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3427 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3428 struct btrfs_root *root, u64 bytes_used,
3429 u64 type, u64 chunk_objectid, u64 chunk_offset,
3431 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3432 struct btrfs_root *root, u64 group_start,
3433 struct extent_map *em);
3434 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3435 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3436 struct btrfs_root *root);
3437 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3438 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3440 enum btrfs_reserve_flush_enum {
3441 /* If we are in the transaction, we can't flush anything.*/
3442 BTRFS_RESERVE_NO_FLUSH,
3444 * Flushing delalloc may cause deadlock somewhere, in this
3445 * case, use FLUSH LIMIT
3447 BTRFS_RESERVE_FLUSH_LIMIT,
3448 BTRFS_RESERVE_FLUSH_ALL,
3451 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3452 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3453 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3454 struct btrfs_root *root);
3455 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3456 struct inode *inode);
3457 void btrfs_orphan_release_metadata(struct inode *inode);
3458 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3459 struct btrfs_block_rsv *rsv,
3461 u64 *qgroup_reserved, bool use_global_rsv);
3462 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3463 struct btrfs_block_rsv *rsv,
3464 u64 qgroup_reserved);
3465 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3466 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3467 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3468 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3469 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3470 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3471 unsigned short type);
3472 void btrfs_free_block_rsv(struct btrfs_root *root,
3473 struct btrfs_block_rsv *rsv);
3474 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3475 int btrfs_block_rsv_add(struct btrfs_root *root,
3476 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3477 enum btrfs_reserve_flush_enum flush);
3478 int btrfs_block_rsv_check(struct btrfs_root *root,
3479 struct btrfs_block_rsv *block_rsv, int min_factor);
3480 int btrfs_block_rsv_refill(struct btrfs_root *root,
3481 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3482 enum btrfs_reserve_flush_enum flush);
3483 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3484 struct btrfs_block_rsv *dst_rsv,
3486 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3487 struct btrfs_block_rsv *dest, u64 num_bytes,
3489 void btrfs_block_rsv_release(struct btrfs_root *root,
3490 struct btrfs_block_rsv *block_rsv,
3492 int btrfs_set_block_group_ro(struct btrfs_root *root,
3493 struct btrfs_block_group_cache *cache);
3494 void btrfs_set_block_group_rw(struct btrfs_root *root,
3495 struct btrfs_block_group_cache *cache);
3496 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3497 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3498 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3499 u64 start, u64 end);
3500 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
3501 u64 num_bytes, u64 *actual_bytes);
3502 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3503 struct btrfs_root *root, u64 type);
3504 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3506 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3507 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3508 struct btrfs_fs_info *fs_info);
3509 int __get_raid_index(u64 flags);
3510 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3511 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3513 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3514 int level, int *slot);
3515 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3516 int btrfs_previous_item(struct btrfs_root *root,
3517 struct btrfs_path *path, u64 min_objectid,
3519 int btrfs_previous_extent_item(struct btrfs_root *root,
3520 struct btrfs_path *path, u64 min_objectid);
3521 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
3522 struct btrfs_path *path,
3523 struct btrfs_key *new_key);
3524 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3525 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3526 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3527 struct btrfs_key *key, int lowest_level,
3529 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3530 struct btrfs_path *path,
3532 enum btrfs_compare_tree_result {
3533 BTRFS_COMPARE_TREE_NEW,
3534 BTRFS_COMPARE_TREE_DELETED,
3535 BTRFS_COMPARE_TREE_CHANGED,
3536 BTRFS_COMPARE_TREE_SAME,
3538 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3539 struct btrfs_root *right_root,
3540 struct btrfs_path *left_path,
3541 struct btrfs_path *right_path,
3542 struct btrfs_key *key,
3543 enum btrfs_compare_tree_result result,
3545 int btrfs_compare_trees(struct btrfs_root *left_root,
3546 struct btrfs_root *right_root,
3547 btrfs_changed_cb_t cb, void *ctx);
3548 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3549 struct btrfs_root *root, struct extent_buffer *buf,
3550 struct extent_buffer *parent, int parent_slot,
3551 struct extent_buffer **cow_ret);
3552 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3553 struct btrfs_root *root,
3554 struct extent_buffer *buf,
3555 struct extent_buffer **cow_ret, u64 new_root_objectid);
3556 int btrfs_block_can_be_shared(struct btrfs_root *root,
3557 struct extent_buffer *buf);
3558 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3560 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3561 u32 new_size, int from_end);
3562 int btrfs_split_item(struct btrfs_trans_handle *trans,
3563 struct btrfs_root *root,
3564 struct btrfs_path *path,
3565 struct btrfs_key *new_key,
3566 unsigned long split_offset);
3567 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3568 struct btrfs_root *root,
3569 struct btrfs_path *path,
3570 struct btrfs_key *new_key);
3571 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3572 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3573 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3574 *root, struct btrfs_key *key, struct btrfs_path *p, int
3576 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3577 struct btrfs_path *p, u64 time_seq);
3578 int btrfs_search_slot_for_read(struct btrfs_root *root,
3579 struct btrfs_key *key, struct btrfs_path *p,
3580 int find_higher, int return_any);
3581 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3582 struct btrfs_root *root, struct extent_buffer *parent,
3583 int start_slot, u64 *last_ret,
3584 struct btrfs_key *progress);
3585 void btrfs_release_path(struct btrfs_path *p);
3586 struct btrfs_path *btrfs_alloc_path(void);
3587 void btrfs_free_path(struct btrfs_path *p);
3588 void btrfs_set_path_blocking(struct btrfs_path *p);
3589 void btrfs_clear_path_blocking(struct btrfs_path *p,
3590 struct extent_buffer *held, int held_rw);
3591 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3593 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3594 struct btrfs_path *path, int slot, int nr);
3595 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3596 struct btrfs_root *root,
3597 struct btrfs_path *path)
3599 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3602 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3603 struct btrfs_key *cpu_key, u32 *data_size,
3604 u32 total_data, u32 total_size, int nr);
3605 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3606 *root, struct btrfs_key *key, void *data, u32 data_size);
3607 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3608 struct btrfs_root *root,
3609 struct btrfs_path *path,
3610 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3612 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3613 struct btrfs_root *root,
3614 struct btrfs_path *path,
3615 struct btrfs_key *key,
3618 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3621 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3622 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3623 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3625 static inline int btrfs_next_old_item(struct btrfs_root *root,
3626 struct btrfs_path *p, u64 time_seq)
3629 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3630 return btrfs_next_old_leaf(root, p, time_seq);
3633 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3635 return btrfs_next_old_item(root, p, 0);
3637 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3638 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3639 struct btrfs_block_rsv *block_rsv,
3640 int update_ref, int for_reloc);
3641 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3642 struct btrfs_root *root,
3643 struct extent_buffer *node,
3644 struct extent_buffer *parent);
3645 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3648 * Get synced with close_ctree()
3651 return fs_info->closing;
3655 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3656 * anything except sleeping. This function is used to check the status of
3659 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3661 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3662 btrfs_fs_closing(root->fs_info));
3665 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3667 kfree(fs_info->balance_ctl);
3668 kfree(fs_info->delayed_root);
3669 kfree(fs_info->extent_root);
3670 kfree(fs_info->tree_root);
3671 kfree(fs_info->chunk_root);
3672 kfree(fs_info->dev_root);
3673 kfree(fs_info->csum_root);
3674 kfree(fs_info->quota_root);
3675 kfree(fs_info->uuid_root);
3676 kfree(fs_info->super_copy);
3677 kfree(fs_info->super_for_commit);
3678 security_free_mnt_opts(&fs_info->security_opts);
3682 /* tree mod log functions from ctree.c */
3683 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3684 struct seq_list *elem);
3685 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3686 struct seq_list *elem);
3687 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3690 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3691 struct btrfs_path *path,
3692 u64 root_id, u64 ref_id);
3693 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3694 struct btrfs_root *tree_root,
3695 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3696 const char *name, int name_len);
3697 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3698 struct btrfs_root *tree_root,
3699 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3700 const char *name, int name_len);
3701 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3702 struct btrfs_key *key);
3703 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3704 *root, struct btrfs_key *key, struct btrfs_root_item
3706 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3707 struct btrfs_root *root,
3708 struct btrfs_key *key,
3709 struct btrfs_root_item *item);
3710 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3711 struct btrfs_path *path, struct btrfs_root_item *root_item,
3712 struct btrfs_key *root_key);
3713 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3714 void btrfs_set_root_node(struct btrfs_root_item *item,
3715 struct extent_buffer *node);
3716 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3717 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3718 struct btrfs_root *root);
3721 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3722 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3724 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3725 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3727 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3728 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3732 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3733 const char *name, int name_len);
3734 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3735 struct btrfs_root *root, const char *name,
3736 int name_len, struct inode *dir,
3737 struct btrfs_key *location, u8 type, u64 index);
3738 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3739 struct btrfs_root *root,
3740 struct btrfs_path *path, u64 dir,
3741 const char *name, int name_len,
3743 struct btrfs_dir_item *
3744 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3745 struct btrfs_root *root,
3746 struct btrfs_path *path, u64 dir,
3747 u64 objectid, const char *name, int name_len,
3749 struct btrfs_dir_item *
3750 btrfs_search_dir_index_item(struct btrfs_root *root,
3751 struct btrfs_path *path, u64 dirid,
3752 const char *name, int name_len);
3753 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3754 struct btrfs_root *root,
3755 struct btrfs_path *path,
3756 struct btrfs_dir_item *di);
3757 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3758 struct btrfs_root *root,
3759 struct btrfs_path *path, u64 objectid,
3760 const char *name, u16 name_len,
3761 const void *data, u16 data_len);
3762 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3763 struct btrfs_root *root,
3764 struct btrfs_path *path, u64 dir,
3765 const char *name, u16 name_len,
3767 int verify_dir_item(struct btrfs_root *root,
3768 struct extent_buffer *leaf,
3769 struct btrfs_dir_item *dir_item);
3770 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3771 struct btrfs_path *path,
3776 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3777 struct btrfs_root *root, u64 offset);
3778 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3779 struct btrfs_root *root, u64 offset);
3780 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3783 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3784 struct btrfs_root *root,
3785 const char *name, int name_len,
3786 u64 inode_objectid, u64 ref_objectid, u64 index);
3787 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3788 struct btrfs_root *root,
3789 const char *name, int name_len,
3790 u64 inode_objectid, u64 ref_objectid, u64 *index);
3791 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3792 struct btrfs_root *root,
3793 struct btrfs_path *path, u64 objectid);
3794 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3795 *root, struct btrfs_path *path,
3796 struct btrfs_key *location, int mod);
3798 struct btrfs_inode_extref *
3799 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3800 struct btrfs_root *root,
3801 struct btrfs_path *path,
3802 const char *name, int name_len,
3803 u64 inode_objectid, u64 ref_objectid, int ins_len,
3806 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3807 u64 ref_objectid, const char *name,
3809 struct btrfs_inode_extref **extref_ret);
3812 struct btrfs_dio_private;
3813 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3814 struct btrfs_root *root, u64 bytenr, u64 len);
3815 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3816 struct bio *bio, u32 *dst);
3817 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3818 struct bio *bio, u64 logical_offset);
3819 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3820 struct btrfs_root *root,
3821 u64 objectid, u64 pos,
3822 u64 disk_offset, u64 disk_num_bytes,
3823 u64 num_bytes, u64 offset, u64 ram_bytes,
3824 u8 compression, u8 encryption, u16 other_encoding);
3825 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3826 struct btrfs_root *root,
3827 struct btrfs_path *path, u64 objectid,
3828 u64 bytenr, int mod);
3829 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3830 struct btrfs_root *root,
3831 struct btrfs_ordered_sum *sums);
3832 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3833 struct bio *bio, u64 file_start, int contig);
3834 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3835 struct list_head *list, int search_commit);
3836 void btrfs_extent_item_to_extent_map(struct inode *inode,
3837 const struct btrfs_path *path,
3838 struct btrfs_file_extent_item *fi,
3839 const bool new_inline,
3840 struct extent_map *em);
3843 struct btrfs_delalloc_work {
3844 struct inode *inode;
3847 struct completion completion;
3848 struct list_head list;
3849 struct btrfs_work work;
3852 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3853 int wait, int delay_iput);
3854 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3856 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3857 size_t pg_offset, u64 start, u64 len,
3859 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3860 u64 *orig_start, u64 *orig_block_len,
3863 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3864 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3865 #define ClearPageChecked ClearPageFsMisc
3866 #define SetPageChecked SetPageFsMisc
3867 #define PageChecked PageFsMisc
3870 /* This forces readahead on a given range of bytes in an inode */
3871 static inline void btrfs_force_ra(struct address_space *mapping,
3872 struct file_ra_state *ra, struct file *file,
3873 pgoff_t offset, unsigned long req_size)
3875 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3878 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3879 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3880 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3881 struct btrfs_root *root,
3882 struct inode *dir, struct inode *inode,
3883 const char *name, int name_len);
3884 int btrfs_add_link(struct btrfs_trans_handle *trans,
3885 struct inode *parent_inode, struct inode *inode,
3886 const char *name, int name_len, int add_backref, u64 index);
3887 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3888 struct btrfs_root *root,
3889 struct inode *dir, u64 objectid,
3890 const char *name, int name_len);
3891 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3893 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3894 struct btrfs_root *root,
3895 struct inode *inode, u64 new_size,
3898 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3899 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3901 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3902 struct extent_state **cached_state);
3903 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3904 struct btrfs_root *new_root,
3905 struct btrfs_root *parent_root,
3907 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3908 size_t size, struct bio *bio,
3909 unsigned long bio_flags);
3910 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3911 int btrfs_readpage(struct file *file, struct page *page);
3912 void btrfs_evict_inode(struct inode *inode);
3913 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3914 struct inode *btrfs_alloc_inode(struct super_block *sb);
3915 void btrfs_destroy_inode(struct inode *inode);
3916 int btrfs_drop_inode(struct inode *inode);
3917 int btrfs_init_cachep(void);
3918 void btrfs_destroy_cachep(void);
3919 long btrfs_ioctl_trans_end(struct file *file);
3920 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3921 struct btrfs_root *root, int *was_new);
3922 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3923 size_t pg_offset, u64 start, u64 end,
3925 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3926 struct btrfs_root *root,
3927 struct inode *inode);
3928 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3929 struct btrfs_root *root, struct inode *inode);
3930 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3931 int btrfs_orphan_cleanup(struct btrfs_root *root);
3932 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3933 struct btrfs_root *root);
3934 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3935 void btrfs_invalidate_inodes(struct btrfs_root *root);
3936 void btrfs_add_delayed_iput(struct inode *inode);
3937 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3938 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3939 u64 start, u64 num_bytes, u64 min_size,
3940 loff_t actual_len, u64 *alloc_hint);
3941 int btrfs_prealloc_file_range_trans(struct inode *inode,
3942 struct btrfs_trans_handle *trans, int mode,
3943 u64 start, u64 num_bytes, u64 min_size,
3944 loff_t actual_len, u64 *alloc_hint);
3945 int btrfs_inode_check_errors(struct inode *inode);
3946 extern const struct dentry_operations btrfs_dentry_operations;
3947 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3948 void btrfs_test_inode_set_ops(struct inode *inode);
3952 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3953 void btrfs_update_iflags(struct inode *inode);
3954 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3955 int btrfs_is_empty_uuid(u8 *uuid);
3956 int btrfs_defrag_file(struct inode *inode, struct file *file,
3957 struct btrfs_ioctl_defrag_range_args *range,
3958 u64 newer_than, unsigned long max_pages);
3959 void btrfs_get_block_group_info(struct list_head *groups_list,
3960 struct btrfs_ioctl_space_info *space);
3961 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3962 struct btrfs_ioctl_balance_args *bargs);
3966 int btrfs_auto_defrag_init(void);
3967 void btrfs_auto_defrag_exit(void);
3968 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3969 struct inode *inode);
3970 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3971 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3972 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3973 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3975 extern const struct file_operations btrfs_file_operations;
3976 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3977 struct btrfs_root *root, struct inode *inode,
3978 struct btrfs_path *path, u64 start, u64 end,
3979 u64 *drop_end, int drop_cache,
3981 u32 extent_item_size,
3983 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3984 struct btrfs_root *root, struct inode *inode, u64 start,
3985 u64 end, int drop_cache);
3986 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3987 struct inode *inode, u64 start, u64 end);
3988 int btrfs_release_file(struct inode *inode, struct file *file);
3989 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3990 struct page **pages, size_t num_pages,
3991 loff_t pos, size_t write_bytes,
3992 struct extent_state **cached);
3993 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3996 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3997 struct btrfs_root *root);
4000 int btrfs_init_sysfs(void);
4001 void btrfs_exit_sysfs(void);
4002 int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
4003 void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
4006 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
4009 int btrfs_parse_options(struct btrfs_root *root, char *options);
4010 int btrfs_sync_fs(struct super_block *sb, int wait);
4012 #ifdef CONFIG_PRINTK
4014 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4016 static inline __printf(2, 3)
4017 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4022 #define btrfs_emerg(fs_info, fmt, args...) \
4023 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4024 #define btrfs_alert(fs_info, fmt, args...) \
4025 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4026 #define btrfs_crit(fs_info, fmt, args...) \
4027 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4028 #define btrfs_err(fs_info, fmt, args...) \
4029 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4030 #define btrfs_warn(fs_info, fmt, args...) \
4031 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4032 #define btrfs_notice(fs_info, fmt, args...) \
4033 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4034 #define btrfs_info(fs_info, fmt, args...) \
4035 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4038 #define btrfs_debug(fs_info, fmt, args...) \
4039 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4041 #define btrfs_debug(fs_info, fmt, args...) \
4042 no_printk(KERN_DEBUG fmt, ##args)
4045 #ifdef CONFIG_BTRFS_ASSERT
4047 static inline void assfail(char *expr, char *file, int line)
4049 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4054 #define ASSERT(expr) \
4055 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4057 #define ASSERT(expr) ((void)0)
4060 #define btrfs_assert()
4062 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
4063 unsigned int line, int errno, const char *fmt, ...);
4066 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4067 struct btrfs_root *root, const char *function,
4068 unsigned int line, int errno);
4070 #define btrfs_set_fs_incompat(__fs_info, opt) \
4071 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4073 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4076 struct btrfs_super_block *disk_super;
4079 disk_super = fs_info->super_copy;
4080 features = btrfs_super_incompat_flags(disk_super);
4081 if (!(features & flag)) {
4082 spin_lock(&fs_info->super_lock);
4083 features = btrfs_super_incompat_flags(disk_super);
4084 if (!(features & flag)) {
4086 btrfs_set_super_incompat_flags(disk_super, features);
4087 btrfs_info(fs_info, "setting %llu feature flag",
4090 spin_unlock(&fs_info->super_lock);
4094 #define btrfs_fs_incompat(fs_info, opt) \
4095 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4097 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4099 struct btrfs_super_block *disk_super;
4100 disk_super = fs_info->super_copy;
4101 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4105 * Call btrfs_abort_transaction as early as possible when an error condition is
4106 * detected, that way the exact line number is reported.
4109 #define btrfs_abort_transaction(trans, root, errno) \
4111 __btrfs_abort_transaction(trans, root, __func__, \
4115 #define btrfs_std_error(fs_info, errno) \
4118 __btrfs_std_error((fs_info), __func__, \
4119 __LINE__, (errno), NULL); \
4122 #define btrfs_error(fs_info, errno, fmt, args...) \
4124 __btrfs_std_error((fs_info), __func__, __LINE__, \
4125 (errno), fmt, ##args); \
4129 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4130 unsigned int line, int errno, const char *fmt, ...);
4133 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4134 * will panic(). Otherwise we BUG() here.
4136 #define btrfs_panic(fs_info, errno, fmt, args...) \
4138 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4143 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4144 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4145 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4146 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4147 struct inode *inode, struct inode *dir);
4149 #define btrfs_get_acl NULL
4150 #define btrfs_set_acl NULL
4151 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4152 struct inode *inode, struct inode *dir)
4159 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4160 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4161 struct btrfs_root *root);
4162 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4163 struct btrfs_root *root);
4164 int btrfs_recover_relocation(struct btrfs_root *root);
4165 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4166 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4167 struct btrfs_root *root, struct extent_buffer *buf,
4168 struct extent_buffer *cow);
4169 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
4170 struct btrfs_pending_snapshot *pending,
4171 u64 *bytes_to_reserve);
4172 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4173 struct btrfs_pending_snapshot *pending);
4176 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4177 u64 end, struct btrfs_scrub_progress *progress,
4178 int readonly, int is_dev_replace);
4179 void btrfs_scrub_pause(struct btrfs_root *root);
4180 void btrfs_scrub_continue(struct btrfs_root *root);
4181 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4182 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4183 struct btrfs_device *dev);
4184 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4185 struct btrfs_scrub_progress *progress);
4188 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4189 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4190 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4192 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4194 btrfs_bio_counter_sub(fs_info, 1);
4198 struct reada_control {
4199 struct btrfs_root *root; /* tree to prefetch */
4200 struct btrfs_key key_start;
4201 struct btrfs_key key_end; /* exclusive */
4204 wait_queue_head_t wait;
4206 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4207 struct btrfs_key *start, struct btrfs_key *end);
4208 int btrfs_reada_wait(void *handle);
4209 void btrfs_reada_detach(void *handle);
4210 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4211 u64 start, int err);
4213 static inline int is_fstree(u64 rootid)
4215 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4216 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4221 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4223 return signal_pending(current);
4226 /* Sanity test specific functions */
4227 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4228 void btrfs_test_destroy_inode(struct inode *inode);
4231 static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4233 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4234 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))