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 /* tracks free space in block groups. */
100 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
102 /* for storing balance parameters in the root tree */
103 #define BTRFS_BALANCE_OBJECTID -4ULL
105 /* orhpan objectid for tracking unlinked/truncated files */
106 #define BTRFS_ORPHAN_OBJECTID -5ULL
108 /* does write ahead logging to speed up fsyncs */
109 #define BTRFS_TREE_LOG_OBJECTID -6ULL
110 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
112 /* for space balancing */
113 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
114 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
117 * extent checksums all have this objectid
118 * this allows them to share the logging tree
121 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
123 /* For storing free space cache */
124 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
127 * The inode number assigned to the special inode for storing
130 #define BTRFS_FREE_INO_OBJECTID -12ULL
132 /* dummy objectid represents multiple objectids */
133 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
136 * All files have objectids in this range.
138 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
139 #define BTRFS_LAST_FREE_OBJECTID -256ULL
140 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
144 * the device items go into the chunk tree. The key is in the form
145 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
147 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
149 #define BTRFS_BTREE_INODE_OBJECTID 1
151 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
153 #define BTRFS_DEV_REPLACE_DEVID 0ULL
156 * the max metadata block size. This limit is somewhat artificial,
157 * but the memmove costs go through the roof for larger blocks.
159 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
162 * we can actually store much bigger names, but lets not confuse the rest
165 #define BTRFS_NAME_LEN 255
168 * Theoretical limit is larger, but we keep this down to a sane
169 * value. That should limit greatly the possibility of collisions on
172 #define BTRFS_LINK_MAX 65535U
174 /* 32 bytes in various csum fields */
175 #define BTRFS_CSUM_SIZE 32
178 #define BTRFS_CSUM_TYPE_CRC32 0
180 static int btrfs_csum_sizes[] = { 4 };
182 /* four bytes for CRC32 */
183 #define BTRFS_EMPTY_DIR_SIZE 0
185 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
186 #define REQ_GET_READ_MIRRORS (1 << 30)
188 #define BTRFS_FT_UNKNOWN 0
189 #define BTRFS_FT_REG_FILE 1
190 #define BTRFS_FT_DIR 2
191 #define BTRFS_FT_CHRDEV 3
192 #define BTRFS_FT_BLKDEV 4
193 #define BTRFS_FT_FIFO 5
194 #define BTRFS_FT_SOCK 6
195 #define BTRFS_FT_SYMLINK 7
196 #define BTRFS_FT_XATTR 8
197 #define BTRFS_FT_MAX 9
199 /* ioprio of readahead is set to idle */
200 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
202 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
204 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
207 * The key defines the order in the tree, and so it also defines (optimal)
210 * objectid corresponds to the inode number.
212 * type tells us things about the object, and is a kind of stream selector.
213 * so for a given inode, keys with type of 1 might refer to the inode data,
214 * type of 2 may point to file data in the btree and type == 3 may point to
217 * offset is the starting byte offset for this key in the stream.
219 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
220 * in cpu native order. Otherwise they are identical and their sizes
221 * should be the same (ie both packed)
223 struct btrfs_disk_key {
227 } __attribute__ ((__packed__));
233 } __attribute__ ((__packed__));
235 struct btrfs_mapping_tree {
236 struct extent_map_tree map_tree;
239 struct btrfs_dev_item {
240 /* the internal btrfs device id */
243 /* size of the device */
249 /* optimal io alignment for this device */
252 /* optimal io width for this device */
255 /* minimal io size for this device */
258 /* type and info about this device */
261 /* expected generation for this device */
265 * starting byte of this partition on the device,
266 * to allow for stripe alignment in the future
270 /* grouping information for allocation decisions */
273 /* seek speed 0-100 where 100 is fastest */
276 /* bandwidth 0-100 where 100 is fastest */
279 /* btrfs generated uuid for this device */
280 u8 uuid[BTRFS_UUID_SIZE];
282 /* uuid of FS who owns this device */
283 u8 fsid[BTRFS_UUID_SIZE];
284 } __attribute__ ((__packed__));
286 struct btrfs_stripe {
289 u8 dev_uuid[BTRFS_UUID_SIZE];
290 } __attribute__ ((__packed__));
293 /* size of this chunk in bytes */
296 /* objectid of the root referencing this chunk */
302 /* optimal io alignment for this chunk */
305 /* optimal io width for this chunk */
308 /* minimal io size for this chunk */
311 /* 2^16 stripes is quite a lot, a second limit is the size of a single
316 /* sub stripes only matter for raid10 */
318 struct btrfs_stripe stripe;
319 /* additional stripes go here */
320 } __attribute__ ((__packed__));
322 #define BTRFS_FREE_SPACE_EXTENT 1
323 #define BTRFS_FREE_SPACE_BITMAP 2
325 struct btrfs_free_space_entry {
329 } __attribute__ ((__packed__));
331 struct btrfs_free_space_header {
332 struct btrfs_disk_key location;
336 } __attribute__ ((__packed__));
338 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
340 BUG_ON(num_stripes == 0);
341 return sizeof(struct btrfs_chunk) +
342 sizeof(struct btrfs_stripe) * (num_stripes - 1);
345 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
346 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
351 #define BTRFS_FS_STATE_ERROR 0
352 #define BTRFS_FS_STATE_REMOUNTING 1
353 #define BTRFS_FS_STATE_TRANS_ABORTED 2
354 #define BTRFS_FS_STATE_DEV_REPLACING 3
356 /* Super block flags */
357 /* Errors detected */
358 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
360 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
361 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
363 #define BTRFS_BACKREF_REV_MAX 256
364 #define BTRFS_BACKREF_REV_SHIFT 56
365 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
366 BTRFS_BACKREF_REV_SHIFT)
368 #define BTRFS_OLD_BACKREF_REV 0
369 #define BTRFS_MIXED_BACKREF_REV 1
372 * every tree block (leaf or node) starts with this header.
374 struct btrfs_header {
375 /* these first four must match the super block */
376 u8 csum[BTRFS_CSUM_SIZE];
377 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
378 __le64 bytenr; /* which block this node is supposed to live in */
381 /* allowed to be different from the super from here on down */
382 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
387 } __attribute__ ((__packed__));
389 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
390 sizeof(struct btrfs_header)) / \
391 sizeof(struct btrfs_key_ptr))
392 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
393 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
394 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
395 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
396 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
397 sizeof(struct btrfs_item) - \
398 BTRFS_FILE_EXTENT_INLINE_DATA_START)
399 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
400 sizeof(struct btrfs_item) -\
401 sizeof(struct btrfs_dir_item))
405 * this is a very generous portion of the super block, giving us
406 * room to translate 14 chunks with 3 stripes each.
408 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
409 #define BTRFS_LABEL_SIZE 256
412 * just in case we somehow lose the roots and are not able to mount,
413 * we store an array of the roots from previous transactions
416 #define BTRFS_NUM_BACKUP_ROOTS 4
417 struct btrfs_root_backup {
419 __le64 tree_root_gen;
422 __le64 chunk_root_gen;
425 __le64 extent_root_gen;
434 __le64 csum_root_gen;
444 u8 extent_root_level;
448 /* future and to align */
450 } __attribute__ ((__packed__));
453 * the super block basically lists the main trees of the FS
454 * it currently lacks any block count etc etc
456 struct btrfs_super_block {
457 u8 csum[BTRFS_CSUM_SIZE];
458 /* the first 4 fields must match struct btrfs_header */
459 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
460 __le64 bytenr; /* this block number */
463 /* allowed to be different from the btrfs_header from here own down */
470 /* this will help find the new super based on the log root */
471 __le64 log_root_transid;
474 __le64 root_dir_objectid;
478 __le32 __unused_leafsize;
480 __le32 sys_chunk_array_size;
481 __le64 chunk_root_generation;
483 __le64 compat_ro_flags;
484 __le64 incompat_flags;
489 struct btrfs_dev_item dev_item;
491 char label[BTRFS_LABEL_SIZE];
493 __le64 cache_generation;
494 __le64 uuid_tree_generation;
496 /* future expansion */
498 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
499 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
500 } __attribute__ ((__packed__));
503 * Compat flags that we support. If any incompat flags are set other than the
504 * ones specified below then we will fail to mount
506 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
508 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
509 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
510 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
511 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
513 * some patches floated around with a second compression method
514 * lets save that incompat here for when they do get in
515 * Note we don't actually support it, we're just reserving the
518 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
521 * older kernels tried to do bigger metadata blocks, but the
522 * code was pretty buggy. Lets not let them try anymore.
524 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
526 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
527 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
528 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
529 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
531 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
532 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
533 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
534 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
535 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
536 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
538 #define BTRFS_FEATURE_INCOMPAT_SUPP \
539 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
540 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
541 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
542 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
543 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
544 BTRFS_FEATURE_INCOMPAT_RAID56 | \
545 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
546 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
547 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
549 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
550 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
551 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
554 * A leaf is full of items. offset and size tell us where to find
555 * the item in the leaf (relative to the start of the data area)
558 struct btrfs_disk_key key;
561 } __attribute__ ((__packed__));
564 * leaves have an item area and a data area:
565 * [item0, item1....itemN] [free space] [dataN...data1, data0]
567 * The data is separate from the items to get the keys closer together
571 struct btrfs_header header;
572 struct btrfs_item items[];
573 } __attribute__ ((__packed__));
576 * all non-leaf blocks are nodes, they hold only keys and pointers to
579 struct btrfs_key_ptr {
580 struct btrfs_disk_key key;
583 } __attribute__ ((__packed__));
586 struct btrfs_header header;
587 struct btrfs_key_ptr ptrs[];
588 } __attribute__ ((__packed__));
591 * btrfs_paths remember the path taken from the root down to the leaf.
592 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
593 * to any other levels that are present.
595 * The slots array records the index of the item or block pointer
596 * used while walking the tree.
599 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
600 int slots[BTRFS_MAX_LEVEL];
601 /* if there is real range locking, this locks field will change */
602 int locks[BTRFS_MAX_LEVEL];
604 /* keep some upper locks as we walk down */
608 * set by btrfs_split_item, tells search_slot to keep all locks
609 * and to force calls to keep space in the nodes
611 unsigned int search_for_split:1;
612 unsigned int keep_locks:1;
613 unsigned int skip_locking:1;
614 unsigned int leave_spinning:1;
615 unsigned int search_commit_root:1;
616 unsigned int need_commit_sem:1;
617 unsigned int skip_release_on_error:1;
621 * items in the extent btree are used to record the objectid of the
622 * owner of the block and the number of references
625 struct btrfs_extent_item {
629 } __attribute__ ((__packed__));
631 struct btrfs_extent_item_v0 {
633 } __attribute__ ((__packed__));
635 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
636 sizeof(struct btrfs_item))
638 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
639 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
641 /* following flags only apply to tree blocks */
643 /* use full backrefs for extent pointers in the block */
644 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
647 * this flag is only used internally by scrub and may be changed at any time
648 * it is only declared here to avoid collisions
650 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
652 struct btrfs_tree_block_info {
653 struct btrfs_disk_key key;
655 } __attribute__ ((__packed__));
657 struct btrfs_extent_data_ref {
662 } __attribute__ ((__packed__));
664 struct btrfs_shared_data_ref {
666 } __attribute__ ((__packed__));
668 struct btrfs_extent_inline_ref {
671 } __attribute__ ((__packed__));
673 /* old style backrefs item */
674 struct btrfs_extent_ref_v0 {
679 } __attribute__ ((__packed__));
682 /* dev extents record free space on individual devices. The owner
683 * field points back to the chunk allocation mapping tree that allocated
684 * the extent. The chunk tree uuid field is a way to double check the owner
686 struct btrfs_dev_extent {
688 __le64 chunk_objectid;
691 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
692 } __attribute__ ((__packed__));
694 struct btrfs_inode_ref {
698 } __attribute__ ((__packed__));
700 struct btrfs_inode_extref {
701 __le64 parent_objectid;
706 } __attribute__ ((__packed__));
708 struct btrfs_timespec {
711 } __attribute__ ((__packed__));
713 enum btrfs_compression_type {
714 BTRFS_COMPRESS_NONE = 0,
715 BTRFS_COMPRESS_ZLIB = 1,
716 BTRFS_COMPRESS_LZO = 2,
717 BTRFS_COMPRESS_TYPES = 2,
718 BTRFS_COMPRESS_LAST = 3,
721 struct btrfs_inode_item {
722 /* nfs style generation number */
724 /* transid that last touched this inode */
736 /* modification sequence number for NFS */
740 * a little future expansion, for more than this we can
741 * just grow the inode item and version it
744 struct btrfs_timespec atime;
745 struct btrfs_timespec ctime;
746 struct btrfs_timespec mtime;
747 struct btrfs_timespec otime;
748 } __attribute__ ((__packed__));
750 struct btrfs_dir_log_item {
752 } __attribute__ ((__packed__));
754 struct btrfs_dir_item {
755 struct btrfs_disk_key location;
760 } __attribute__ ((__packed__));
762 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
765 * Internal in-memory flag that a subvolume has been marked for deletion but
766 * still visible as a directory
768 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
770 struct btrfs_root_item {
771 struct btrfs_inode_item inode;
777 __le64 last_snapshot;
780 struct btrfs_disk_key drop_progress;
785 * The following fields appear after subvol_uuids+subvol_times
790 * This generation number is used to test if the new fields are valid
791 * and up to date while reading the root item. Everytime the root item
792 * is written out, the "generation" field is copied into this field. If
793 * anyone ever mounted the fs with an older kernel, we will have
794 * mismatching generation values here and thus must invalidate the
795 * new fields. See btrfs_update_root and btrfs_find_last_root for
797 * the offset of generation_v2 is also used as the start for the memset
798 * when invalidating the fields.
800 __le64 generation_v2;
801 u8 uuid[BTRFS_UUID_SIZE];
802 u8 parent_uuid[BTRFS_UUID_SIZE];
803 u8 received_uuid[BTRFS_UUID_SIZE];
804 __le64 ctransid; /* updated when an inode changes */
805 __le64 otransid; /* trans when created */
806 __le64 stransid; /* trans when sent. non-zero for received subvol */
807 __le64 rtransid; /* trans when received. non-zero for received subvol */
808 struct btrfs_timespec ctime;
809 struct btrfs_timespec otime;
810 struct btrfs_timespec stime;
811 struct btrfs_timespec rtime;
812 __le64 reserved[8]; /* for future */
813 } __attribute__ ((__packed__));
816 * this is used for both forward and backward root refs
818 struct btrfs_root_ref {
822 } __attribute__ ((__packed__));
824 struct btrfs_disk_balance_args {
826 * profiles to operate on, single is denoted by
827 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
837 /* devid subset filter [pstart..pend) */
841 /* btrfs virtual address space subset filter [vstart..vend) */
846 * profile to convert to, single is denoted by
847 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
851 /* BTRFS_BALANCE_ARGS_* */
854 /* BTRFS_BALANCE_ARGS_LIMIT value */
858 } __attribute__ ((__packed__));
861 * store balance parameters to disk so that balance can be properly
862 * resumed after crash or unmount
864 struct btrfs_balance_item {
865 /* BTRFS_BALANCE_* */
868 struct btrfs_disk_balance_args data;
869 struct btrfs_disk_balance_args meta;
870 struct btrfs_disk_balance_args sys;
873 } __attribute__ ((__packed__));
875 #define BTRFS_FILE_EXTENT_INLINE 0
876 #define BTRFS_FILE_EXTENT_REG 1
877 #define BTRFS_FILE_EXTENT_PREALLOC 2
879 struct btrfs_file_extent_item {
881 * transaction id that created this extent
885 * max number of bytes to hold this extent in ram
886 * when we split a compressed extent we can't know how big
887 * each of the resulting pieces will be. So, this is
888 * an upper limit on the size of the extent in ram instead of
894 * 32 bits for the various ways we might encode the data,
895 * including compression and encryption. If any of these
896 * are set to something a given disk format doesn't understand
897 * it is treated like an incompat flag for reading and writing,
902 __le16 other_encoding; /* spare for later use */
904 /* are we inline data or a real extent? */
908 * disk space consumed by the extent, checksum blocks are included
911 * At this offset in the structure, the inline extent data start.
914 __le64 disk_num_bytes;
916 * the logical offset in file blocks (no csums)
917 * this extent record is for. This allows a file extent to point
918 * into the middle of an existing extent on disk, sharing it
919 * between two snapshots (useful if some bytes in the middle of the
920 * extent have changed
924 * the logical number of file blocks (no csums included). This
925 * always reflects the size uncompressed and without encoding.
929 } __attribute__ ((__packed__));
931 struct btrfs_csum_item {
933 } __attribute__ ((__packed__));
935 struct btrfs_dev_stats_item {
937 * grow this item struct at the end for future enhancements and keep
938 * the existing values unchanged
940 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
941 } __attribute__ ((__packed__));
943 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
944 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
945 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
946 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
947 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
948 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
949 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
951 struct btrfs_dev_replace {
952 u64 replace_state; /* see #define above */
953 u64 time_started; /* seconds since 1-Jan-1970 */
954 u64 time_stopped; /* seconds since 1-Jan-1970 */
955 atomic64_t num_write_errors;
956 atomic64_t num_uncorrectable_read_errors;
959 u64 committed_cursor_left;
960 u64 cursor_left_last_write_of_item;
963 u64 cont_reading_from_srcdev_mode; /* see #define above */
966 int item_needs_writeback;
967 struct btrfs_device *srcdev;
968 struct btrfs_device *tgtdev;
971 atomic_t nesting_level;
972 struct mutex lock_finishing_cancel_unmount;
973 struct mutex lock_management_lock;
976 struct btrfs_scrub_progress scrub_progress;
979 struct btrfs_dev_replace_item {
981 * grow this item struct at the end for future enhancements and keep
982 * the existing values unchanged
987 __le64 cont_reading_from_srcdev_mode;
989 __le64 replace_state;
992 __le64 num_write_errors;
993 __le64 num_uncorrectable_read_errors;
994 } __attribute__ ((__packed__));
996 /* different types of block groups (and chunks) */
997 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
998 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
999 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
1000 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
1001 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
1002 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
1003 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
1004 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1005 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1006 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1007 BTRFS_SPACE_INFO_GLOBAL_RSV)
1009 enum btrfs_raid_types {
1020 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1021 BTRFS_BLOCK_GROUP_SYSTEM | \
1022 BTRFS_BLOCK_GROUP_METADATA)
1024 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1025 BTRFS_BLOCK_GROUP_RAID1 | \
1026 BTRFS_BLOCK_GROUP_RAID5 | \
1027 BTRFS_BLOCK_GROUP_RAID6 | \
1028 BTRFS_BLOCK_GROUP_DUP | \
1029 BTRFS_BLOCK_GROUP_RAID10)
1030 #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1031 BTRFS_BLOCK_GROUP_RAID6)
1034 * We need a bit for restriper to be able to tell when chunks of type
1035 * SINGLE are available. This "extended" profile format is used in
1036 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1037 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1038 * to avoid remappings between two formats in future.
1040 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1043 * A fake block group type that is used to communicate global block reserve
1044 * size to userspace via the SPACE_INFO ioctl.
1046 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1048 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1049 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1051 static inline u64 chunk_to_extended(u64 flags)
1053 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1054 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1058 static inline u64 extended_to_chunk(u64 flags)
1060 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1063 struct btrfs_block_group_item {
1065 __le64 chunk_objectid;
1067 } __attribute__ ((__packed__));
1069 struct btrfs_free_space_info {
1070 __le32 extent_count;
1072 } __attribute__ ((__packed__));
1074 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1076 #define BTRFS_QGROUP_LEVEL_SHIFT 48
1077 static inline u64 btrfs_qgroup_level(u64 qgroupid)
1079 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1083 * is subvolume quota turned on?
1085 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1087 * RESCAN is set during the initialization phase
1089 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1091 * Some qgroup entries are known to be out of date,
1092 * either because the configuration has changed in a way that
1093 * makes a rescan necessary, or because the fs has been mounted
1094 * with a non-qgroup-aware version.
1095 * Turning qouta off and on again makes it inconsistent, too.
1097 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1099 #define BTRFS_QGROUP_STATUS_VERSION 1
1101 struct btrfs_qgroup_status_item {
1104 * the generation is updated during every commit. As older
1105 * versions of btrfs are not aware of qgroups, it will be
1106 * possible to detect inconsistencies by checking the
1107 * generation on mount time
1111 /* flag definitions see above */
1115 * only used during scanning to record the progress
1116 * of the scan. It contains a logical address
1119 } __attribute__ ((__packed__));
1121 struct btrfs_qgroup_info_item {
1127 } __attribute__ ((__packed__));
1129 /* flags definition for qgroup limits */
1130 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1131 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1132 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1133 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1134 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1135 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1137 struct btrfs_qgroup_limit_item {
1139 * only updated when any of the other values change
1146 } __attribute__ ((__packed__));
1148 /* For raid type sysfs entries */
1149 struct raid_kobject {
1151 struct kobject kobj;
1154 struct btrfs_space_info {
1157 u64 total_bytes; /* total bytes in the space,
1158 this doesn't take mirrors into account */
1159 u64 bytes_used; /* total bytes used,
1160 this doesn't take mirrors into account */
1161 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1162 transaction finishes */
1163 u64 bytes_reserved; /* total bytes the allocator has reserved for
1164 current allocations */
1165 u64 bytes_may_use; /* number of bytes that may be used for
1166 delalloc/allocations */
1167 u64 bytes_readonly; /* total bytes that are read only */
1169 unsigned int full:1; /* indicates that we cannot allocate any more
1170 chunks for this space */
1171 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1173 unsigned int flush:1; /* set if we are trying to make space */
1175 unsigned int force_alloc; /* set if we need to force a chunk
1176 alloc for this space */
1178 u64 disk_used; /* total bytes used on disk */
1179 u64 disk_total; /* total bytes on disk, takes mirrors into
1185 * bytes_pinned is kept in line with what is actually pinned, as in
1186 * we've called update_block_group and dropped the bytes_used counter
1187 * and increased the bytes_pinned counter. However this means that
1188 * bytes_pinned does not reflect the bytes that will be pinned once the
1189 * delayed refs are flushed, so this counter is inc'ed everytime we call
1190 * btrfs_free_extent so it is a realtime count of what will be freed
1191 * once the transaction is committed. It will be zero'ed everytime the
1192 * transaction commits.
1194 struct percpu_counter total_bytes_pinned;
1196 struct list_head list;
1197 /* Protected by the spinlock 'lock'. */
1198 struct list_head ro_bgs;
1200 struct rw_semaphore groups_sem;
1201 /* for block groups in our same type */
1202 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1203 wait_queue_head_t wait;
1205 struct kobject kobj;
1206 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1209 #define BTRFS_BLOCK_RSV_GLOBAL 1
1210 #define BTRFS_BLOCK_RSV_DELALLOC 2
1211 #define BTRFS_BLOCK_RSV_TRANS 3
1212 #define BTRFS_BLOCK_RSV_CHUNK 4
1213 #define BTRFS_BLOCK_RSV_DELOPS 5
1214 #define BTRFS_BLOCK_RSV_EMPTY 6
1215 #define BTRFS_BLOCK_RSV_TEMP 7
1217 struct btrfs_block_rsv {
1220 struct btrfs_space_info *space_info;
1222 unsigned short full;
1223 unsigned short type;
1224 unsigned short failfast;
1228 * free clusters are used to claim free space in relatively large chunks,
1229 * allowing us to do less seeky writes. They are used for all metadata
1230 * allocations and data allocations in ssd mode.
1232 struct btrfs_free_cluster {
1234 spinlock_t refill_lock;
1235 struct rb_root root;
1237 /* largest extent in this cluster */
1240 /* first extent starting offset */
1243 struct btrfs_block_group_cache *block_group;
1245 * when a cluster is allocated from a block group, we put the
1246 * cluster onto a list in the block group so that it can
1247 * be freed before the block group is freed.
1249 struct list_head block_group_list;
1252 enum btrfs_caching_type {
1254 BTRFS_CACHE_STARTED = 1,
1255 BTRFS_CACHE_FAST = 2,
1256 BTRFS_CACHE_FINISHED = 3,
1257 BTRFS_CACHE_ERROR = 4,
1260 enum btrfs_disk_cache_state {
1261 BTRFS_DC_WRITTEN = 0,
1267 struct btrfs_caching_control {
1268 struct list_head list;
1270 wait_queue_head_t wait;
1271 struct btrfs_work work;
1272 struct btrfs_block_group_cache *block_group;
1277 /* Once caching_thread() finds this much free space, it will wake up waiters. */
1278 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
1280 struct btrfs_io_ctl {
1283 struct page **pages;
1284 struct btrfs_root *root;
1285 struct inode *inode;
1291 unsigned check_crcs:1;
1294 struct btrfs_block_group_cache {
1295 struct btrfs_key key;
1296 struct btrfs_block_group_item item;
1297 struct btrfs_fs_info *fs_info;
1298 struct inode *inode;
1306 u64 cache_generation;
1309 * It is just used for the delayed data space allocation because
1310 * only the data space allocation and the relative metadata update
1311 * can be done cross the transaction.
1313 struct rw_semaphore data_rwsem;
1315 /* for raid56, this is a full stripe, without parity */
1316 unsigned long full_stripe_len;
1319 unsigned int iref:1;
1320 unsigned int has_caching_ctl:1;
1321 unsigned int removed:1;
1323 int disk_cache_state;
1325 /* cache tracking stuff */
1327 struct btrfs_caching_control *caching_ctl;
1328 u64 last_byte_to_unpin;
1330 struct btrfs_space_info *space_info;
1332 /* free space cache stuff */
1333 struct btrfs_free_space_ctl *free_space_ctl;
1335 /* block group cache stuff */
1336 struct rb_node cache_node;
1338 /* for block groups in the same raid type */
1339 struct list_head list;
1344 /* List of struct btrfs_free_clusters for this block group.
1345 * Today it will only have one thing on it, but that may change
1347 struct list_head cluster_list;
1349 /* For delayed block group creation or deletion of empty block groups */
1350 struct list_head bg_list;
1352 /* For read-only block groups */
1353 struct list_head ro_list;
1357 /* For dirty block groups */
1358 struct list_head dirty_list;
1359 struct list_head io_list;
1361 struct btrfs_io_ctl io_ctl;
1364 /* delayed seq elem */
1366 struct list_head list;
1370 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1372 enum btrfs_orphan_cleanup_state {
1373 ORPHAN_CLEANUP_STARTED = 1,
1374 ORPHAN_CLEANUP_DONE = 2,
1377 /* used by the raid56 code to lock stripes for read/modify/write */
1378 struct btrfs_stripe_hash {
1379 struct list_head hash_list;
1380 wait_queue_head_t wait;
1384 /* used by the raid56 code to lock stripes for read/modify/write */
1385 struct btrfs_stripe_hash_table {
1386 struct list_head stripe_cache;
1387 spinlock_t cache_lock;
1389 struct btrfs_stripe_hash table[];
1392 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1394 void btrfs_init_async_reclaim_work(struct work_struct *work);
1397 struct reloc_control;
1398 struct btrfs_device;
1399 struct btrfs_fs_devices;
1400 struct btrfs_balance_control;
1401 struct btrfs_delayed_root;
1402 struct btrfs_fs_info {
1403 u8 fsid[BTRFS_FSID_SIZE];
1404 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1405 struct btrfs_root *extent_root;
1406 struct btrfs_root *tree_root;
1407 struct btrfs_root *chunk_root;
1408 struct btrfs_root *dev_root;
1409 struct btrfs_root *fs_root;
1410 struct btrfs_root *csum_root;
1411 struct btrfs_root *quota_root;
1412 struct btrfs_root *uuid_root;
1414 /* the log root tree is a directory of all the other log roots */
1415 struct btrfs_root *log_root_tree;
1417 spinlock_t fs_roots_radix_lock;
1418 struct radix_tree_root fs_roots_radix;
1420 /* block group cache stuff */
1421 spinlock_t block_group_cache_lock;
1422 u64 first_logical_byte;
1423 struct rb_root block_group_cache_tree;
1425 /* keep track of unallocated space */
1426 spinlock_t free_chunk_lock;
1427 u64 free_chunk_space;
1429 struct extent_io_tree freed_extents[2];
1430 struct extent_io_tree *pinned_extents;
1432 /* logical->physical extent mapping */
1433 struct btrfs_mapping_tree mapping_tree;
1436 * block reservation for extent, checksum, root tree and
1437 * delayed dir index item
1439 struct btrfs_block_rsv global_block_rsv;
1440 /* block reservation for delay allocation */
1441 struct btrfs_block_rsv delalloc_block_rsv;
1442 /* block reservation for metadata operations */
1443 struct btrfs_block_rsv trans_block_rsv;
1444 /* block reservation for chunk tree */
1445 struct btrfs_block_rsv chunk_block_rsv;
1446 /* block reservation for delayed operations */
1447 struct btrfs_block_rsv delayed_block_rsv;
1449 struct btrfs_block_rsv empty_block_rsv;
1452 u64 last_trans_committed;
1453 u64 avg_delayed_ref_runtime;
1456 * this is updated to the current trans every time a full commit
1457 * is required instead of the faster short fsync log commits
1459 u64 last_trans_log_full_commit;
1460 unsigned long mount_opt;
1462 * Track requests for actions that need to be done during transaction
1463 * commit (like for some mount options).
1465 unsigned long pending_changes;
1466 unsigned long compress_type:4;
1467 int commit_interval;
1469 * It is a suggestive number, the read side is safe even it gets a
1470 * wrong number because we will write out the data into a regular
1471 * extent. The write side(mount/remount) is under ->s_umount lock,
1472 * so it is also safe.
1476 * Protected by ->chunk_mutex and sb->s_umount.
1478 * The reason that we use two lock to protect it is because only
1479 * remount and mount operations can change it and these two operations
1480 * are under sb->s_umount, but the read side (chunk allocation) can not
1481 * acquire sb->s_umount or the deadlock would happen. So we use two
1482 * locks to protect it. On the write side, we must acquire two locks,
1483 * and on the read side, we just need acquire one of them.
1486 struct btrfs_transaction *running_transaction;
1487 wait_queue_head_t transaction_throttle;
1488 wait_queue_head_t transaction_wait;
1489 wait_queue_head_t transaction_blocked_wait;
1490 wait_queue_head_t async_submit_wait;
1493 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1494 * when they are updated.
1496 * Because we do not clear the flags for ever, so we needn't use
1497 * the lock on the read side.
1499 * We also needn't use the lock when we mount the fs, because
1500 * there is no other task which will update the flag.
1502 spinlock_t super_lock;
1503 struct btrfs_super_block *super_copy;
1504 struct btrfs_super_block *super_for_commit;
1505 struct block_device *__bdev;
1506 struct super_block *sb;
1507 struct inode *btree_inode;
1508 struct backing_dev_info bdi;
1509 struct mutex tree_log_mutex;
1510 struct mutex transaction_kthread_mutex;
1511 struct mutex cleaner_mutex;
1512 struct mutex chunk_mutex;
1513 struct mutex volume_mutex;
1516 * this is taken to make sure we don't set block groups ro after
1517 * the free space cache has been allocated on them
1519 struct mutex ro_block_group_mutex;
1521 /* this is used during read/modify/write to make sure
1522 * no two ios are trying to mod the same stripe at the same
1525 struct btrfs_stripe_hash_table *stripe_hash_table;
1528 * this protects the ordered operations list only while we are
1529 * processing all of the entries on it. This way we make
1530 * sure the commit code doesn't find the list temporarily empty
1531 * because another function happens to be doing non-waiting preflush
1532 * before jumping into the main commit.
1534 struct mutex ordered_operations_mutex;
1536 struct rw_semaphore commit_root_sem;
1538 struct rw_semaphore cleanup_work_sem;
1540 struct rw_semaphore subvol_sem;
1541 struct srcu_struct subvol_srcu;
1543 spinlock_t trans_lock;
1545 * the reloc mutex goes with the trans lock, it is taken
1546 * during commit to protect us from the relocation code
1548 struct mutex reloc_mutex;
1550 struct list_head trans_list;
1551 struct list_head dead_roots;
1552 struct list_head caching_block_groups;
1554 spinlock_t delayed_iput_lock;
1555 struct list_head delayed_iputs;
1556 struct rw_semaphore delayed_iput_sem;
1558 /* this protects tree_mod_seq_list */
1559 spinlock_t tree_mod_seq_lock;
1560 atomic64_t tree_mod_seq;
1561 struct list_head tree_mod_seq_list;
1563 /* this protects tree_mod_log */
1564 rwlock_t tree_mod_log_lock;
1565 struct rb_root tree_mod_log;
1567 atomic_t nr_async_submits;
1568 atomic_t async_submit_draining;
1569 atomic_t nr_async_bios;
1570 atomic_t async_delalloc_pages;
1571 atomic_t open_ioctl_trans;
1574 * this is used to protect the following list -- ordered_roots.
1576 spinlock_t ordered_root_lock;
1579 * all fs/file tree roots in which there are data=ordered extents
1580 * pending writeback are added into this list.
1582 * these can span multiple transactions and basically include
1583 * every dirty data page that isn't from nodatacow
1585 struct list_head ordered_roots;
1587 struct mutex delalloc_root_mutex;
1588 spinlock_t delalloc_root_lock;
1589 /* all fs/file tree roots that have delalloc inodes. */
1590 struct list_head delalloc_roots;
1593 * there is a pool of worker threads for checksumming during writes
1594 * and a pool for checksumming after reads. This is because readers
1595 * can run with FS locks held, and the writers may be waiting for
1596 * those locks. We don't want ordering in the pending list to cause
1597 * deadlocks, and so the two are serviced separately.
1599 * A third pool does submit_bio to avoid deadlocking with the other
1602 struct btrfs_workqueue *workers;
1603 struct btrfs_workqueue *delalloc_workers;
1604 struct btrfs_workqueue *flush_workers;
1605 struct btrfs_workqueue *endio_workers;
1606 struct btrfs_workqueue *endio_meta_workers;
1607 struct btrfs_workqueue *endio_raid56_workers;
1608 struct btrfs_workqueue *endio_repair_workers;
1609 struct btrfs_workqueue *rmw_workers;
1610 struct btrfs_workqueue *endio_meta_write_workers;
1611 struct btrfs_workqueue *endio_write_workers;
1612 struct btrfs_workqueue *endio_freespace_worker;
1613 struct btrfs_workqueue *submit_workers;
1614 struct btrfs_workqueue *caching_workers;
1615 struct btrfs_workqueue *readahead_workers;
1618 * fixup workers take dirty pages that didn't properly go through
1619 * the cow mechanism and make them safe to write. It happens
1620 * for the sys_munmap function call path
1622 struct btrfs_workqueue *fixup_workers;
1623 struct btrfs_workqueue *delayed_workers;
1625 /* the extent workers do delayed refs on the extent allocation tree */
1626 struct btrfs_workqueue *extent_workers;
1627 struct task_struct *transaction_kthread;
1628 struct task_struct *cleaner_kthread;
1629 int thread_pool_size;
1631 struct kobject *space_info_kobj;
1634 int log_root_recovering;
1639 /* used to keep from writing metadata until there is a nice batch */
1640 struct percpu_counter dirty_metadata_bytes;
1641 struct percpu_counter delalloc_bytes;
1642 s32 dirty_metadata_batch;
1645 struct list_head dirty_cowonly_roots;
1647 struct btrfs_fs_devices *fs_devices;
1650 * the space_info list is almost entirely read only. It only changes
1651 * when we add a new raid type to the FS, and that happens
1652 * very rarely. RCU is used to protect it.
1654 struct list_head space_info;
1656 struct btrfs_space_info *data_sinfo;
1658 struct reloc_control *reloc_ctl;
1660 /* data_alloc_cluster is only used in ssd mode */
1661 struct btrfs_free_cluster data_alloc_cluster;
1663 /* all metadata allocations go through this cluster */
1664 struct btrfs_free_cluster meta_alloc_cluster;
1666 /* auto defrag inodes go here */
1667 spinlock_t defrag_inodes_lock;
1668 struct rb_root defrag_inodes;
1669 atomic_t defrag_running;
1671 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1672 seqlock_t profiles_lock;
1674 * these three are in extended format (availability of single
1675 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1676 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1678 u64 avail_data_alloc_bits;
1679 u64 avail_metadata_alloc_bits;
1680 u64 avail_system_alloc_bits;
1682 /* restriper state */
1683 spinlock_t balance_lock;
1684 struct mutex balance_mutex;
1685 atomic_t balance_running;
1686 atomic_t balance_pause_req;
1687 atomic_t balance_cancel_req;
1688 struct btrfs_balance_control *balance_ctl;
1689 wait_queue_head_t balance_wait_q;
1691 unsigned data_chunk_allocations;
1692 unsigned metadata_ratio;
1696 /* private scrub information */
1697 struct mutex scrub_lock;
1698 atomic_t scrubs_running;
1699 atomic_t scrub_pause_req;
1700 atomic_t scrubs_paused;
1701 atomic_t scrub_cancel_req;
1702 wait_queue_head_t scrub_pause_wait;
1703 int scrub_workers_refcnt;
1704 struct btrfs_workqueue *scrub_workers;
1705 struct btrfs_workqueue *scrub_wr_completion_workers;
1706 struct btrfs_workqueue *scrub_nocow_workers;
1707 struct btrfs_workqueue *scrub_parity_workers;
1709 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1710 u32 check_integrity_print_mask;
1715 unsigned int quota_enabled:1;
1718 * quota_enabled only changes state after a commit. This holds the
1721 unsigned int pending_quota_state:1;
1723 /* is qgroup tracking in a consistent state? */
1726 /* holds configuration and tracking. Protected by qgroup_lock */
1727 struct rb_root qgroup_tree;
1728 struct rb_root qgroup_op_tree;
1729 spinlock_t qgroup_lock;
1730 spinlock_t qgroup_op_lock;
1731 atomic_t qgroup_op_seq;
1734 * used to avoid frequently calling ulist_alloc()/ulist_free()
1735 * when doing qgroup accounting, it must be protected by qgroup_lock.
1737 struct ulist *qgroup_ulist;
1739 /* protect user change for quota operations */
1740 struct mutex qgroup_ioctl_lock;
1742 /* list of dirty qgroups to be written at next commit */
1743 struct list_head dirty_qgroups;
1745 /* used by qgroup for an efficient tree traversal */
1748 /* qgroup rescan items */
1749 struct mutex qgroup_rescan_lock; /* protects the progress item */
1750 struct btrfs_key qgroup_rescan_progress;
1751 struct btrfs_workqueue *qgroup_rescan_workers;
1752 struct completion qgroup_rescan_completion;
1753 struct btrfs_work qgroup_rescan_work;
1755 /* filesystem state */
1756 unsigned long fs_state;
1758 struct btrfs_delayed_root *delayed_root;
1760 /* readahead tree */
1761 spinlock_t reada_lock;
1762 struct radix_tree_root reada_tree;
1764 /* Extent buffer radix tree */
1765 spinlock_t buffer_lock;
1766 struct radix_tree_root buffer_radix;
1768 /* next backup root to be overwritten */
1769 int backup_root_index;
1771 int num_tolerated_disk_barrier_failures;
1773 /* device replace state */
1774 struct btrfs_dev_replace dev_replace;
1776 atomic_t mutually_exclusive_operation_running;
1778 struct percpu_counter bio_counter;
1779 wait_queue_head_t replace_wait;
1781 struct semaphore uuid_tree_rescan_sem;
1782 unsigned int update_uuid_tree_gen:1;
1784 /* Used to reclaim the metadata space in the background. */
1785 struct work_struct async_reclaim_work;
1787 spinlock_t unused_bgs_lock;
1788 struct list_head unused_bgs;
1789 struct mutex unused_bg_unpin_mutex;
1790 struct mutex delete_unused_bgs_mutex;
1792 /* For btrfs to record security options */
1793 struct security_mnt_opts security_opts;
1796 * Chunks that can't be freed yet (under a trim/discard operation)
1797 * and will be latter freed. Protected by fs_info->chunk_mutex.
1799 struct list_head pinned_chunks;
1802 struct btrfs_subvolume_writers {
1803 struct percpu_counter counter;
1804 wait_queue_head_t wait;
1808 * The state of btrfs root
1811 * btrfs_record_root_in_trans is a multi-step process,
1812 * and it can race with the balancing code. But the
1813 * race is very small, and only the first time the root
1814 * is added to each transaction. So IN_TRANS_SETUP
1815 * is used to tell us when more checks are required
1817 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1818 #define BTRFS_ROOT_REF_COWS 1
1819 #define BTRFS_ROOT_TRACK_DIRTY 2
1820 #define BTRFS_ROOT_IN_RADIX 3
1821 #define BTRFS_ROOT_DUMMY_ROOT 4
1822 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1823 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1824 #define BTRFS_ROOT_FORCE_COW 7
1825 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1826 #define BTRFS_ROOT_DIRTY 9
1829 * in ram representation of the tree. extent_root is used for all allocations
1830 * and for the extent tree extent_root root.
1833 struct extent_buffer *node;
1835 struct extent_buffer *commit_root;
1836 struct btrfs_root *log_root;
1837 struct btrfs_root *reloc_root;
1839 unsigned long state;
1840 struct btrfs_root_item root_item;
1841 struct btrfs_key root_key;
1842 struct btrfs_fs_info *fs_info;
1843 struct extent_io_tree dirty_log_pages;
1845 struct mutex objectid_mutex;
1847 spinlock_t accounting_lock;
1848 struct btrfs_block_rsv *block_rsv;
1850 /* free ino cache stuff */
1851 struct btrfs_free_space_ctl *free_ino_ctl;
1852 enum btrfs_caching_type ino_cache_state;
1853 spinlock_t ino_cache_lock;
1854 wait_queue_head_t ino_cache_wait;
1855 struct btrfs_free_space_ctl *free_ino_pinned;
1856 u64 ino_cache_progress;
1857 struct inode *ino_cache_inode;
1859 struct mutex log_mutex;
1860 wait_queue_head_t log_writer_wait;
1861 wait_queue_head_t log_commit_wait[2];
1862 struct list_head log_ctxs[2];
1863 atomic_t log_writers;
1864 atomic_t log_commit[2];
1867 /* No matter the commit succeeds or not*/
1868 int log_transid_committed;
1869 /* Just be updated when the commit succeeds. */
1870 int last_log_commit;
1871 pid_t log_start_pid;
1876 /* data allocations are done in sectorsize units */
1879 /* node allocations are done in nodesize units */
1886 u64 highest_objectid;
1888 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1891 u64 defrag_trans_start;
1892 struct btrfs_key defrag_progress;
1893 struct btrfs_key defrag_max;
1896 /* the dirty list is only used by non-reference counted roots */
1897 struct list_head dirty_list;
1899 struct list_head root_list;
1901 spinlock_t log_extents_lock[2];
1902 struct list_head logged_list[2];
1904 spinlock_t orphan_lock;
1905 atomic_t orphan_inodes;
1906 struct btrfs_block_rsv *orphan_block_rsv;
1907 int orphan_cleanup_state;
1909 spinlock_t inode_lock;
1910 /* red-black tree that keeps track of in-memory inodes */
1911 struct rb_root inode_tree;
1914 * radix tree that keeps track of delayed nodes of every inode,
1915 * protected by inode_lock
1917 struct radix_tree_root delayed_nodes_tree;
1919 * right now this just gets used so that a root has its own devid
1920 * for stat. It may be used for more later
1924 spinlock_t root_item_lock;
1927 struct mutex delalloc_mutex;
1928 spinlock_t delalloc_lock;
1930 * all of the inodes that have delalloc bytes. It is possible for
1931 * this list to be empty even when there is still dirty data=ordered
1932 * extents waiting to finish IO.
1934 struct list_head delalloc_inodes;
1935 struct list_head delalloc_root;
1936 u64 nr_delalloc_inodes;
1938 struct mutex ordered_extent_mutex;
1940 * this is used by the balancing code to wait for all the pending
1943 spinlock_t ordered_extent_lock;
1946 * all of the data=ordered extents pending writeback
1947 * these can span multiple transactions and basically include
1948 * every dirty data page that isn't from nodatacow
1950 struct list_head ordered_extents;
1951 struct list_head ordered_root;
1952 u64 nr_ordered_extents;
1955 * Number of currently running SEND ioctls to prevent
1956 * manipulation with the read-only status via SUBVOL_SETFLAGS
1958 int send_in_progress;
1959 struct btrfs_subvolume_writers *subv_writers;
1960 atomic_t will_be_snapshoted;
1963 struct btrfs_ioctl_defrag_range_args {
1964 /* start of the defrag operation */
1967 /* number of bytes to defrag, use (u64)-1 to say all */
1971 * flags for the operation, which can include turning
1972 * on compression for this one defrag
1977 * any extent bigger than this will be considered
1978 * already defragged. Use 0 to take the kernel default
1979 * Use 1 to say every single extent must be rewritten
1981 __u32 extent_thresh;
1984 * which compression method to use if turning on compression
1985 * for this defrag operation. If unspecified, zlib will
1988 __u32 compress_type;
1990 /* spare for later */
1996 * inode items have the data typically returned from stat and store other
1997 * info about object characteristics. There is one for every file and dir in
2000 #define BTRFS_INODE_ITEM_KEY 1
2001 #define BTRFS_INODE_REF_KEY 12
2002 #define BTRFS_INODE_EXTREF_KEY 13
2003 #define BTRFS_XATTR_ITEM_KEY 24
2004 #define BTRFS_ORPHAN_ITEM_KEY 48
2005 /* reserve 2-15 close to the inode for later flexibility */
2008 * dir items are the name -> inode pointers in a directory. There is one
2009 * for every name in a directory.
2011 #define BTRFS_DIR_LOG_ITEM_KEY 60
2012 #define BTRFS_DIR_LOG_INDEX_KEY 72
2013 #define BTRFS_DIR_ITEM_KEY 84
2014 #define BTRFS_DIR_INDEX_KEY 96
2016 * extent data is for file data
2018 #define BTRFS_EXTENT_DATA_KEY 108
2021 * extent csums are stored in a separate tree and hold csums for
2022 * an entire extent on disk.
2024 #define BTRFS_EXTENT_CSUM_KEY 128
2027 * root items point to tree roots. They are typically in the root
2028 * tree used by the super block to find all the other trees
2030 #define BTRFS_ROOT_ITEM_KEY 132
2033 * root backrefs tie subvols and snapshots to the directory entries that
2036 #define BTRFS_ROOT_BACKREF_KEY 144
2039 * root refs make a fast index for listing all of the snapshots and
2040 * subvolumes referenced by a given root. They point directly to the
2041 * directory item in the root that references the subvol
2043 #define BTRFS_ROOT_REF_KEY 156
2046 * extent items are in the extent map tree. These record which blocks
2047 * are used, and how many references there are to each block
2049 #define BTRFS_EXTENT_ITEM_KEY 168
2052 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2053 * the length, so we save the level in key->offset instead of the length.
2055 #define BTRFS_METADATA_ITEM_KEY 169
2057 #define BTRFS_TREE_BLOCK_REF_KEY 176
2059 #define BTRFS_EXTENT_DATA_REF_KEY 178
2061 #define BTRFS_EXTENT_REF_V0_KEY 180
2063 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2065 #define BTRFS_SHARED_DATA_REF_KEY 184
2068 * block groups give us hints into the extent allocation trees. Which
2069 * blocks are free etc etc
2071 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2074 * Every block group is represented in the free space tree by a free space info
2075 * item, which stores some accounting information. It is keyed on
2076 * (block_group_start, FREE_SPACE_INFO, block_group_length).
2078 #define BTRFS_FREE_SPACE_INFO_KEY 198
2081 * A free space extent tracks an extent of space that is free in a block group.
2082 * It is keyed on (start, FREE_SPACE_EXTENT, length).
2084 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
2087 * When a block group becomes very fragmented, we convert it to use bitmaps
2088 * instead of extents. A free space bitmap is keyed on
2089 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
2090 * (length / sectorsize) bits.
2092 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
2094 #define BTRFS_DEV_EXTENT_KEY 204
2095 #define BTRFS_DEV_ITEM_KEY 216
2096 #define BTRFS_CHUNK_ITEM_KEY 228
2099 * Records the overall state of the qgroups.
2100 * There's only one instance of this key present,
2101 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2103 #define BTRFS_QGROUP_STATUS_KEY 240
2105 * Records the currently used space of the qgroup.
2106 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2108 #define BTRFS_QGROUP_INFO_KEY 242
2110 * Contains the user configured limits for the qgroup.
2111 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2113 #define BTRFS_QGROUP_LIMIT_KEY 244
2115 * Records the child-parent relationship of qgroups. For
2116 * each relation, 2 keys are present:
2117 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2118 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2120 #define BTRFS_QGROUP_RELATION_KEY 246
2122 #define BTRFS_BALANCE_ITEM_KEY 248
2125 * Persistantly stores the io stats in the device tree.
2126 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2128 #define BTRFS_DEV_STATS_KEY 249
2131 * Persistantly stores the device replace state in the device tree.
2132 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2134 #define BTRFS_DEV_REPLACE_KEY 250
2137 * Stores items that allow to quickly map UUIDs to something else.
2138 * These items are part of the filesystem UUID tree.
2139 * The key is built like this:
2140 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2142 #if BTRFS_UUID_SIZE != 16
2143 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2145 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2146 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2147 * received subvols */
2150 * string items are for debugging. They just store a short string of
2153 #define BTRFS_STRING_ITEM_KEY 253
2156 * Flags for mount options.
2158 * Note: don't forget to add new options to btrfs_show_options()
2160 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2161 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2162 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2163 #define BTRFS_MOUNT_SSD (1 << 3)
2164 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2165 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2166 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2167 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2168 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2169 #define BTRFS_MOUNT_NOSSD (1 << 9)
2170 #define BTRFS_MOUNT_DISCARD (1 << 10)
2171 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2172 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2173 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2174 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2175 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2176 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2177 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2178 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2179 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2180 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2181 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2182 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2183 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2185 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2186 #define BTRFS_DEFAULT_MAX_INLINE (8192)
2188 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2189 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2190 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2191 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2194 #define btrfs_set_and_info(root, opt, fmt, args...) \
2196 if (!btrfs_test_opt(root, opt)) \
2197 btrfs_info(root->fs_info, fmt, ##args); \
2198 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2201 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2203 if (btrfs_test_opt(root, opt)) \
2204 btrfs_info(root->fs_info, fmt, ##args); \
2205 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2209 * Requests for changes that need to be done during transaction commit.
2211 * Internal mount options that are used for special handling of the real
2212 * mount options (eg. cannot be set during remount and have to be set during
2213 * transaction commit)
2216 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2217 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2218 #define BTRFS_PENDING_COMMIT (2)
2220 #define btrfs_test_pending(info, opt) \
2221 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2222 #define btrfs_set_pending(info, opt) \
2223 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2224 #define btrfs_clear_pending(info, opt) \
2225 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2228 * Helpers for setting pending mount option changes.
2230 * Expects corresponding macros
2231 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2233 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2235 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2236 btrfs_info((info), fmt, ##args); \
2237 btrfs_set_pending((info), SET_##opt); \
2238 btrfs_clear_pending((info), CLEAR_##opt); \
2242 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2244 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2245 btrfs_info((info), fmt, ##args); \
2246 btrfs_set_pending((info), CLEAR_##opt); \
2247 btrfs_clear_pending((info), SET_##opt); \
2254 #define BTRFS_INODE_NODATASUM (1 << 0)
2255 #define BTRFS_INODE_NODATACOW (1 << 1)
2256 #define BTRFS_INODE_READONLY (1 << 2)
2257 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2258 #define BTRFS_INODE_PREALLOC (1 << 4)
2259 #define BTRFS_INODE_SYNC (1 << 5)
2260 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2261 #define BTRFS_INODE_APPEND (1 << 7)
2262 #define BTRFS_INODE_NODUMP (1 << 8)
2263 #define BTRFS_INODE_NOATIME (1 << 9)
2264 #define BTRFS_INODE_DIRSYNC (1 << 10)
2265 #define BTRFS_INODE_COMPRESS (1 << 11)
2267 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2269 struct btrfs_map_token {
2270 struct extent_buffer *eb;
2272 unsigned long offset;
2275 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2277 token->kaddr = NULL;
2280 /* some macros to generate set/get funcs for the struct fields. This
2281 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2284 #define le8_to_cpu(v) (v)
2285 #define cpu_to_le8(v) (v)
2288 #define read_eb_member(eb, ptr, type, member, result) ( \
2289 read_extent_buffer(eb, (char *)(result), \
2290 ((unsigned long)(ptr)) + \
2291 offsetof(type, member), \
2292 sizeof(((type *)0)->member)))
2294 #define write_eb_member(eb, ptr, type, member, result) ( \
2295 write_extent_buffer(eb, (char *)(result), \
2296 ((unsigned long)(ptr)) + \
2297 offsetof(type, member), \
2298 sizeof(((type *)0)->member)))
2300 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2301 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2302 unsigned long off, \
2303 struct btrfs_map_token *token); \
2304 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2305 unsigned long off, u##bits val, \
2306 struct btrfs_map_token *token); \
2307 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2308 unsigned long off) \
2310 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2312 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2313 unsigned long off, u##bits val) \
2315 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2318 DECLARE_BTRFS_SETGET_BITS(8)
2319 DECLARE_BTRFS_SETGET_BITS(16)
2320 DECLARE_BTRFS_SETGET_BITS(32)
2321 DECLARE_BTRFS_SETGET_BITS(64)
2323 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2324 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2326 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2327 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2329 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2332 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2333 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2335 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2336 struct btrfs_map_token *token) \
2338 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2339 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2341 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2342 type *s, u##bits val, \
2343 struct btrfs_map_token *token) \
2345 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2346 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2349 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2350 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2352 type *p = page_address(eb->pages[0]); \
2353 u##bits res = le##bits##_to_cpu(p->member); \
2356 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2359 type *p = page_address(eb->pages[0]); \
2360 p->member = cpu_to_le##bits(val); \
2363 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2364 static inline u##bits btrfs_##name(type *s) \
2366 return le##bits##_to_cpu(s->member); \
2368 static inline void btrfs_set_##name(type *s, u##bits val) \
2370 s->member = cpu_to_le##bits(val); \
2373 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2374 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2375 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2376 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2377 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2378 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2380 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2381 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2382 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2383 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2384 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2385 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2387 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2388 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2390 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2392 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2394 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2396 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2398 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2399 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2401 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2403 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2405 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2408 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2410 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2413 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2415 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2418 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2419 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2420 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2421 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2422 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2423 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2424 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2425 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2426 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2427 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2428 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2430 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2432 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2435 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2436 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2437 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2439 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2441 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2443 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2445 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2446 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2448 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2450 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2451 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2453 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2456 unsigned long offset = (unsigned long)c;
2457 offset += offsetof(struct btrfs_chunk, stripe);
2458 offset += nr * sizeof(struct btrfs_stripe);
2459 return (struct btrfs_stripe *)offset;
2462 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2464 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2467 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2468 struct btrfs_chunk *c, int nr)
2470 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2473 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2474 struct btrfs_chunk *c, int nr)
2476 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2479 /* struct btrfs_block_group_item */
2480 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2482 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2484 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2485 struct btrfs_block_group_item, chunk_objectid, 64);
2487 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2488 struct btrfs_block_group_item, chunk_objectid, 64);
2489 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2490 struct btrfs_block_group_item, flags, 64);
2491 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2492 struct btrfs_block_group_item, flags, 64);
2494 /* struct btrfs_free_space_info */
2495 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
2497 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
2499 /* struct btrfs_inode_ref */
2500 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2501 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2503 /* struct btrfs_inode_extref */
2504 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2505 parent_objectid, 64);
2506 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2508 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2510 /* struct btrfs_inode_item */
2511 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2512 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2513 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2514 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2515 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2516 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2517 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2518 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2519 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2520 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2521 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2522 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2523 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2525 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2527 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2529 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2530 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2532 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2534 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2535 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2536 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2537 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2538 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2539 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2540 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2541 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2542 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2543 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2545 /* struct btrfs_dev_extent */
2546 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2548 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2549 chunk_objectid, 64);
2550 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2552 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2554 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2556 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2557 return (unsigned long)dev + ptr;
2560 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2561 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2563 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2565 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2568 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2570 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2571 struct btrfs_tree_block_info *item,
2572 struct btrfs_disk_key *key)
2574 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2577 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2578 struct btrfs_tree_block_info *item,
2579 struct btrfs_disk_key *key)
2581 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2584 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2586 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2588 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2590 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2593 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2596 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2598 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2601 static inline u32 btrfs_extent_inline_ref_size(int type)
2603 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2604 type == BTRFS_SHARED_BLOCK_REF_KEY)
2605 return sizeof(struct btrfs_extent_inline_ref);
2606 if (type == BTRFS_SHARED_DATA_REF_KEY)
2607 return sizeof(struct btrfs_shared_data_ref) +
2608 sizeof(struct btrfs_extent_inline_ref);
2609 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2610 return sizeof(struct btrfs_extent_data_ref) +
2611 offsetof(struct btrfs_extent_inline_ref, offset);
2616 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2617 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2619 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2620 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2622 /* struct btrfs_node */
2623 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2624 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2625 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2627 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2630 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2633 ptr = offsetof(struct btrfs_node, ptrs) +
2634 sizeof(struct btrfs_key_ptr) * nr;
2635 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2638 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2642 ptr = offsetof(struct btrfs_node, ptrs) +
2643 sizeof(struct btrfs_key_ptr) * nr;
2644 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2647 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2650 ptr = offsetof(struct btrfs_node, ptrs) +
2651 sizeof(struct btrfs_key_ptr) * nr;
2652 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2655 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2659 ptr = offsetof(struct btrfs_node, ptrs) +
2660 sizeof(struct btrfs_key_ptr) * nr;
2661 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2664 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2666 return offsetof(struct btrfs_node, ptrs) +
2667 sizeof(struct btrfs_key_ptr) * nr;
2670 void btrfs_node_key(struct extent_buffer *eb,
2671 struct btrfs_disk_key *disk_key, int nr);
2673 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2674 struct btrfs_disk_key *disk_key, int nr)
2677 ptr = btrfs_node_key_ptr_offset(nr);
2678 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2679 struct btrfs_key_ptr, key, disk_key);
2682 /* struct btrfs_item */
2683 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2684 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2685 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2686 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2688 static inline unsigned long btrfs_item_nr_offset(int nr)
2690 return offsetof(struct btrfs_leaf, items) +
2691 sizeof(struct btrfs_item) * nr;
2694 static inline struct btrfs_item *btrfs_item_nr(int nr)
2696 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2699 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2700 struct btrfs_item *item)
2702 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2705 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2707 return btrfs_item_end(eb, btrfs_item_nr(nr));
2710 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2712 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2715 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2717 return btrfs_item_size(eb, btrfs_item_nr(nr));
2720 static inline void btrfs_item_key(struct extent_buffer *eb,
2721 struct btrfs_disk_key *disk_key, int nr)
2723 struct btrfs_item *item = btrfs_item_nr(nr);
2724 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2727 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2728 struct btrfs_disk_key *disk_key, int nr)
2730 struct btrfs_item *item = btrfs_item_nr(nr);
2731 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2734 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2737 * struct btrfs_root_ref
2739 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2740 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2741 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2743 /* struct btrfs_dir_item */
2744 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2745 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2746 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2747 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2748 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2749 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2751 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2753 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2756 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2757 struct btrfs_dir_item *item,
2758 struct btrfs_disk_key *key)
2760 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2763 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2764 struct btrfs_dir_item *item,
2765 struct btrfs_disk_key *key)
2767 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2770 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2772 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2774 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2777 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2778 struct btrfs_free_space_header *h,
2779 struct btrfs_disk_key *key)
2781 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2784 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2785 struct btrfs_free_space_header *h,
2786 struct btrfs_disk_key *key)
2788 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2791 /* struct btrfs_disk_key */
2792 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2794 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2795 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2797 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2798 struct btrfs_disk_key *disk)
2800 cpu->offset = le64_to_cpu(disk->offset);
2801 cpu->type = disk->type;
2802 cpu->objectid = le64_to_cpu(disk->objectid);
2805 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2806 struct btrfs_key *cpu)
2808 disk->offset = cpu_to_le64(cpu->offset);
2809 disk->type = cpu->type;
2810 disk->objectid = cpu_to_le64(cpu->objectid);
2813 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2814 struct btrfs_key *key, int nr)
2816 struct btrfs_disk_key disk_key;
2817 btrfs_node_key(eb, &disk_key, nr);
2818 btrfs_disk_key_to_cpu(key, &disk_key);
2821 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2822 struct btrfs_key *key, int nr)
2824 struct btrfs_disk_key disk_key;
2825 btrfs_item_key(eb, &disk_key, nr);
2826 btrfs_disk_key_to_cpu(key, &disk_key);
2829 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2830 struct btrfs_dir_item *item,
2831 struct btrfs_key *key)
2833 struct btrfs_disk_key disk_key;
2834 btrfs_dir_item_key(eb, item, &disk_key);
2835 btrfs_disk_key_to_cpu(key, &disk_key);
2839 static inline u8 btrfs_key_type(struct btrfs_key *key)
2844 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2849 /* struct btrfs_header */
2850 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2851 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2853 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2854 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2855 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2856 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2857 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2859 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2860 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2862 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2864 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2866 return (btrfs_header_flags(eb) & flag) == flag;
2869 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2871 u64 flags = btrfs_header_flags(eb);
2872 btrfs_set_header_flags(eb, flags | flag);
2873 return (flags & flag) == flag;
2876 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2878 u64 flags = btrfs_header_flags(eb);
2879 btrfs_set_header_flags(eb, flags & ~flag);
2880 return (flags & flag) == flag;
2883 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2885 u64 flags = btrfs_header_flags(eb);
2886 return flags >> BTRFS_BACKREF_REV_SHIFT;
2889 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2892 u64 flags = btrfs_header_flags(eb);
2893 flags &= ~BTRFS_BACKREF_REV_MASK;
2894 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2895 btrfs_set_header_flags(eb, flags);
2898 static inline unsigned long btrfs_header_fsid(void)
2900 return offsetof(struct btrfs_header, fsid);
2903 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2905 return offsetof(struct btrfs_header, chunk_tree_uuid);
2908 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2910 return btrfs_header_level(eb) == 0;
2913 /* struct btrfs_root_item */
2914 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2916 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2917 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2918 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2920 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2922 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2923 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2924 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2925 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2926 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2927 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2928 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2929 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2931 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2933 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2935 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2937 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2939 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2942 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2944 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2947 static inline bool btrfs_root_dead(struct btrfs_root *root)
2949 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2952 /* struct btrfs_root_backup */
2953 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2955 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2957 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2958 tree_root_level, 8);
2960 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2962 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2963 chunk_root_gen, 64);
2964 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2965 chunk_root_level, 8);
2967 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2969 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2970 extent_root_gen, 64);
2971 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2972 extent_root_level, 8);
2974 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2976 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2978 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2981 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2983 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2985 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2988 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2990 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2992 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2993 csum_root_level, 8);
2994 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2996 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2998 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
3001 /* struct btrfs_balance_item */
3002 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
3004 static inline void btrfs_balance_data(struct extent_buffer *eb,
3005 struct btrfs_balance_item *bi,
3006 struct btrfs_disk_balance_args *ba)
3008 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3011 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
3012 struct btrfs_balance_item *bi,
3013 struct btrfs_disk_balance_args *ba)
3015 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
3018 static inline void btrfs_balance_meta(struct extent_buffer *eb,
3019 struct btrfs_balance_item *bi,
3020 struct btrfs_disk_balance_args *ba)
3022 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3025 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
3026 struct btrfs_balance_item *bi,
3027 struct btrfs_disk_balance_args *ba)
3029 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
3032 static inline void btrfs_balance_sys(struct extent_buffer *eb,
3033 struct btrfs_balance_item *bi,
3034 struct btrfs_disk_balance_args *ba)
3036 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3039 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
3040 struct btrfs_balance_item *bi,
3041 struct btrfs_disk_balance_args *ba)
3043 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
3047 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
3048 struct btrfs_disk_balance_args *disk)
3050 memset(cpu, 0, sizeof(*cpu));
3052 cpu->profiles = le64_to_cpu(disk->profiles);
3053 cpu->usage = le64_to_cpu(disk->usage);
3054 cpu->devid = le64_to_cpu(disk->devid);
3055 cpu->pstart = le64_to_cpu(disk->pstart);
3056 cpu->pend = le64_to_cpu(disk->pend);
3057 cpu->vstart = le64_to_cpu(disk->vstart);
3058 cpu->vend = le64_to_cpu(disk->vend);
3059 cpu->target = le64_to_cpu(disk->target);
3060 cpu->flags = le64_to_cpu(disk->flags);
3061 cpu->limit = le64_to_cpu(disk->limit);
3065 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
3066 struct btrfs_balance_args *cpu)
3068 memset(disk, 0, sizeof(*disk));
3070 disk->profiles = cpu_to_le64(cpu->profiles);
3071 disk->usage = cpu_to_le64(cpu->usage);
3072 disk->devid = cpu_to_le64(cpu->devid);
3073 disk->pstart = cpu_to_le64(cpu->pstart);
3074 disk->pend = cpu_to_le64(cpu->pend);
3075 disk->vstart = cpu_to_le64(cpu->vstart);
3076 disk->vend = cpu_to_le64(cpu->vend);
3077 disk->target = cpu_to_le64(cpu->target);
3078 disk->flags = cpu_to_le64(cpu->flags);
3079 disk->limit = cpu_to_le64(cpu->limit);
3082 /* struct btrfs_super_block */
3083 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3084 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3085 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
3087 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3088 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
3089 struct btrfs_super_block, sys_chunk_array_size, 32);
3090 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
3091 struct btrfs_super_block, chunk_root_generation, 64);
3092 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
3094 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
3096 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
3097 chunk_root_level, 8);
3098 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
3100 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
3101 log_root_transid, 64);
3102 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
3104 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
3106 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
3108 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
3110 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
3112 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3114 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3115 root_dir_objectid, 64);
3116 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3118 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3120 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
3121 compat_ro_flags, 64);
3122 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3123 incompat_flags, 64);
3124 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3126 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3127 cache_generation, 64);
3128 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3129 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3130 uuid_tree_generation, 64);
3132 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3134 u16 t = btrfs_super_csum_type(s);
3136 * csum type is validated at mount time
3138 return btrfs_csum_sizes[t];
3141 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3143 return offsetof(struct btrfs_leaf, items);
3146 /* struct btrfs_file_extent_item */
3147 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3148 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3149 struct btrfs_file_extent_item, disk_bytenr, 64);
3150 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3151 struct btrfs_file_extent_item, offset, 64);
3152 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3153 struct btrfs_file_extent_item, generation, 64);
3154 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3155 struct btrfs_file_extent_item, num_bytes, 64);
3156 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3157 struct btrfs_file_extent_item, disk_num_bytes, 64);
3158 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3159 struct btrfs_file_extent_item, compression, 8);
3161 static inline unsigned long
3162 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3164 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3167 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3169 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3172 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3174 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3176 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3177 disk_num_bytes, 64);
3178 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3180 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3182 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3184 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3186 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3188 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3189 other_encoding, 16);
3192 * this returns the number of bytes used by the item on disk, minus the
3193 * size of any extent headers. If a file is compressed on disk, this is
3194 * the compressed size
3196 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3197 struct btrfs_item *e)
3199 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
3202 /* this returns the number of file bytes represented by the inline item.
3203 * If an item is compressed, this is the uncompressed size
3205 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3207 struct btrfs_file_extent_item *fi)
3209 struct btrfs_map_token token;
3211 btrfs_init_map_token(&token);
3213 * return the space used on disk if this item isn't
3214 * compressed or encoded
3216 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3217 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3218 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3219 return btrfs_file_extent_inline_item_len(eb,
3220 btrfs_item_nr(slot));
3223 /* otherwise use the ram bytes field */
3224 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3228 /* btrfs_dev_stats_item */
3229 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3230 struct btrfs_dev_stats_item *ptr,
3235 read_extent_buffer(eb, &val,
3236 offsetof(struct btrfs_dev_stats_item, values) +
3237 ((unsigned long)ptr) + (index * sizeof(u64)),
3242 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3243 struct btrfs_dev_stats_item *ptr,
3246 write_extent_buffer(eb, &val,
3247 offsetof(struct btrfs_dev_stats_item, values) +
3248 ((unsigned long)ptr) + (index * sizeof(u64)),
3252 /* btrfs_qgroup_status_item */
3253 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3255 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3257 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3259 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3262 /* btrfs_qgroup_info_item */
3263 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3265 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3266 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3268 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3269 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3272 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3273 struct btrfs_qgroup_info_item, generation, 64);
3274 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3276 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3277 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3278 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3280 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3281 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3283 /* btrfs_qgroup_limit_item */
3284 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3286 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3288 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3290 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3292 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3295 /* btrfs_dev_replace_item */
3296 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3297 struct btrfs_dev_replace_item, src_devid, 64);
3298 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3299 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3301 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3303 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3305 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3307 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3308 num_write_errors, 64);
3309 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3310 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3312 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3314 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3317 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3318 struct btrfs_dev_replace_item, src_devid, 64);
3319 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3320 struct btrfs_dev_replace_item,
3321 cont_reading_from_srcdev_mode, 64);
3322 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3323 struct btrfs_dev_replace_item, replace_state, 64);
3324 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3325 struct btrfs_dev_replace_item, time_started, 64);
3326 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3327 struct btrfs_dev_replace_item, time_stopped, 64);
3328 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3329 struct btrfs_dev_replace_item, num_write_errors, 64);
3330 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3331 struct btrfs_dev_replace_item,
3332 num_uncorrectable_read_errors, 64);
3333 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3334 struct btrfs_dev_replace_item, cursor_left, 64);
3335 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3336 struct btrfs_dev_replace_item, cursor_right, 64);
3338 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3340 return sb->s_fs_info;
3343 /* helper function to cast into the data area of the leaf. */
3344 #define btrfs_item_ptr(leaf, slot, type) \
3345 ((type *)(btrfs_leaf_data(leaf) + \
3346 btrfs_item_offset_nr(leaf, slot)))
3348 #define btrfs_item_ptr_offset(leaf, slot) \
3349 ((unsigned long)(btrfs_leaf_data(leaf) + \
3350 btrfs_item_offset_nr(leaf, slot)))
3352 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3354 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3355 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3358 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3360 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3365 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
3367 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3370 return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3375 * Doing a truncate won't result in new nodes or leaves, just what we need for
3378 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3381 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3384 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3385 struct btrfs_root *root);
3386 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3387 struct btrfs_root *root);
3388 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3389 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3390 struct btrfs_root *root, unsigned long count);
3391 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3392 unsigned long count, int wait);
3393 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3394 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3395 struct btrfs_root *root, u64 bytenr,
3396 u64 offset, int metadata, u64 *refs, u64 *flags);
3397 int btrfs_pin_extent(struct btrfs_root *root,
3398 u64 bytenr, u64 num, int reserved);
3399 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3400 u64 bytenr, u64 num_bytes);
3401 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3402 struct extent_buffer *eb);
3403 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3404 struct btrfs_root *root,
3405 u64 objectid, u64 offset, u64 bytenr);
3406 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3407 struct btrfs_fs_info *info,
3409 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3410 int get_block_group_index(struct btrfs_block_group_cache *cache);
3411 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
3412 struct btrfs_root *root, u64 parent,
3414 struct btrfs_disk_key *key, int level,
3415 u64 hint, u64 empty_size);
3416 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3417 struct btrfs_root *root,
3418 struct extent_buffer *buf,
3419 u64 parent, int last_ref);
3420 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3421 struct btrfs_root *root,
3422 u64 root_objectid, u64 owner,
3423 u64 offset, struct btrfs_key *ins);
3424 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3425 struct btrfs_root *root,
3426 u64 root_objectid, u64 owner, u64 offset,
3427 struct btrfs_key *ins);
3428 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3429 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3430 struct btrfs_key *ins, int is_data, int delalloc);
3431 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3432 struct extent_buffer *buf, int full_backref);
3433 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3434 struct extent_buffer *buf, int full_backref);
3435 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3436 struct btrfs_root *root,
3437 u64 bytenr, u64 num_bytes, u64 flags,
3438 int level, int is_data);
3439 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3440 struct btrfs_root *root,
3441 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3442 u64 owner, u64 offset, int no_quota);
3444 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3446 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3447 u64 start, u64 len);
3448 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3449 struct btrfs_root *root);
3450 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3451 struct btrfs_root *root);
3452 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3453 struct btrfs_root *root,
3454 u64 bytenr, u64 num_bytes, u64 parent,
3455 u64 root_objectid, u64 owner, u64 offset, int no_quota);
3457 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
3458 struct btrfs_root *root);
3459 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3460 struct btrfs_root *root);
3461 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
3462 struct btrfs_root *root);
3463 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3464 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3465 int btrfs_read_block_groups(struct btrfs_root *root);
3466 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3467 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3468 struct btrfs_root *root, u64 bytes_used,
3469 u64 type, u64 chunk_objectid, u64 chunk_offset,
3471 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3472 struct btrfs_root *root, u64 group_start,
3473 struct extent_map *em);
3474 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3475 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
3476 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
3477 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3478 struct btrfs_root *root);
3479 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3480 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3482 enum btrfs_reserve_flush_enum {
3483 /* If we are in the transaction, we can't flush anything.*/
3484 BTRFS_RESERVE_NO_FLUSH,
3486 * Flushing delalloc may cause deadlock somewhere, in this
3487 * case, use FLUSH LIMIT
3489 BTRFS_RESERVE_FLUSH_LIMIT,
3490 BTRFS_RESERVE_FLUSH_ALL,
3493 int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes);
3494 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3495 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3496 struct btrfs_root *root);
3497 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
3498 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3499 struct inode *inode);
3500 void btrfs_orphan_release_metadata(struct inode *inode);
3501 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3502 struct btrfs_block_rsv *rsv,
3504 u64 *qgroup_reserved, bool use_global_rsv);
3505 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3506 struct btrfs_block_rsv *rsv,
3507 u64 qgroup_reserved);
3508 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3509 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3510 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3511 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3512 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3513 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3514 unsigned short type);
3515 void btrfs_free_block_rsv(struct btrfs_root *root,
3516 struct btrfs_block_rsv *rsv);
3517 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3518 int btrfs_block_rsv_add(struct btrfs_root *root,
3519 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3520 enum btrfs_reserve_flush_enum flush);
3521 int btrfs_block_rsv_check(struct btrfs_root *root,
3522 struct btrfs_block_rsv *block_rsv, int min_factor);
3523 int btrfs_block_rsv_refill(struct btrfs_root *root,
3524 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3525 enum btrfs_reserve_flush_enum flush);
3526 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3527 struct btrfs_block_rsv *dst_rsv,
3529 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3530 struct btrfs_block_rsv *dest, u64 num_bytes,
3532 void btrfs_block_rsv_release(struct btrfs_root *root,
3533 struct btrfs_block_rsv *block_rsv,
3535 int btrfs_inc_block_group_ro(struct btrfs_root *root,
3536 struct btrfs_block_group_cache *cache);
3537 void btrfs_dec_block_group_ro(struct btrfs_root *root,
3538 struct btrfs_block_group_cache *cache);
3539 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3540 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3541 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3542 u64 start, u64 end);
3543 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
3544 u64 num_bytes, u64 *actual_bytes);
3545 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3546 struct btrfs_root *root, u64 type);
3547 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3549 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3550 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3551 struct btrfs_fs_info *fs_info);
3552 int __get_raid_index(u64 flags);
3553 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
3554 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3555 void check_system_chunk(struct btrfs_trans_handle *trans,
3556 struct btrfs_root *root,
3559 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3560 int level, int *slot);
3561 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3562 int btrfs_previous_item(struct btrfs_root *root,
3563 struct btrfs_path *path, u64 min_objectid,
3565 int btrfs_previous_extent_item(struct btrfs_root *root,
3566 struct btrfs_path *path, u64 min_objectid);
3567 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
3568 struct btrfs_path *path,
3569 struct btrfs_key *new_key);
3570 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3571 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3572 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3573 struct btrfs_key *key, int lowest_level,
3575 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3576 struct btrfs_path *path,
3578 enum btrfs_compare_tree_result {
3579 BTRFS_COMPARE_TREE_NEW,
3580 BTRFS_COMPARE_TREE_DELETED,
3581 BTRFS_COMPARE_TREE_CHANGED,
3582 BTRFS_COMPARE_TREE_SAME,
3584 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3585 struct btrfs_root *right_root,
3586 struct btrfs_path *left_path,
3587 struct btrfs_path *right_path,
3588 struct btrfs_key *key,
3589 enum btrfs_compare_tree_result result,
3591 int btrfs_compare_trees(struct btrfs_root *left_root,
3592 struct btrfs_root *right_root,
3593 btrfs_changed_cb_t cb, void *ctx);
3594 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3595 struct btrfs_root *root, struct extent_buffer *buf,
3596 struct extent_buffer *parent, int parent_slot,
3597 struct extent_buffer **cow_ret);
3598 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3599 struct btrfs_root *root,
3600 struct extent_buffer *buf,
3601 struct extent_buffer **cow_ret, u64 new_root_objectid);
3602 int btrfs_block_can_be_shared(struct btrfs_root *root,
3603 struct extent_buffer *buf);
3604 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3606 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3607 u32 new_size, int from_end);
3608 int btrfs_split_item(struct btrfs_trans_handle *trans,
3609 struct btrfs_root *root,
3610 struct btrfs_path *path,
3611 struct btrfs_key *new_key,
3612 unsigned long split_offset);
3613 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3614 struct btrfs_root *root,
3615 struct btrfs_path *path,
3616 struct btrfs_key *new_key);
3617 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3618 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3619 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3620 *root, struct btrfs_key *key, struct btrfs_path *p, int
3622 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3623 struct btrfs_path *p, u64 time_seq);
3624 int btrfs_search_slot_for_read(struct btrfs_root *root,
3625 struct btrfs_key *key, struct btrfs_path *p,
3626 int find_higher, int return_any);
3627 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3628 struct btrfs_root *root, struct extent_buffer *parent,
3629 int start_slot, u64 *last_ret,
3630 struct btrfs_key *progress);
3631 void btrfs_release_path(struct btrfs_path *p);
3632 struct btrfs_path *btrfs_alloc_path(void);
3633 void btrfs_free_path(struct btrfs_path *p);
3634 void btrfs_set_path_blocking(struct btrfs_path *p);
3635 void btrfs_clear_path_blocking(struct btrfs_path *p,
3636 struct extent_buffer *held, int held_rw);
3637 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3639 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3640 struct btrfs_path *path, int slot, int nr);
3641 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3642 struct btrfs_root *root,
3643 struct btrfs_path *path)
3645 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3648 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3649 struct btrfs_key *cpu_key, u32 *data_size,
3650 u32 total_data, u32 total_size, int nr);
3651 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3652 *root, struct btrfs_key *key, void *data, u32 data_size);
3653 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3654 struct btrfs_root *root,
3655 struct btrfs_path *path,
3656 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3658 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3659 struct btrfs_root *root,
3660 struct btrfs_path *path,
3661 struct btrfs_key *key,
3664 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3667 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3668 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3669 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3671 static inline int btrfs_next_old_item(struct btrfs_root *root,
3672 struct btrfs_path *p, u64 time_seq)
3675 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3676 return btrfs_next_old_leaf(root, p, time_seq);
3679 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3681 return btrfs_next_old_item(root, p, 0);
3683 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3684 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3685 struct btrfs_block_rsv *block_rsv,
3686 int update_ref, int for_reloc);
3687 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3688 struct btrfs_root *root,
3689 struct extent_buffer *node,
3690 struct extent_buffer *parent);
3691 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3694 * Get synced with close_ctree()
3697 return fs_info->closing;
3701 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3702 * anything except sleeping. This function is used to check the status of
3705 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3707 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3708 btrfs_fs_closing(root->fs_info));
3711 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3713 kfree(fs_info->balance_ctl);
3714 kfree(fs_info->delayed_root);
3715 kfree(fs_info->extent_root);
3716 kfree(fs_info->tree_root);
3717 kfree(fs_info->chunk_root);
3718 kfree(fs_info->dev_root);
3719 kfree(fs_info->csum_root);
3720 kfree(fs_info->quota_root);
3721 kfree(fs_info->uuid_root);
3722 kfree(fs_info->super_copy);
3723 kfree(fs_info->super_for_commit);
3724 security_free_mnt_opts(&fs_info->security_opts);
3728 /* tree mod log functions from ctree.c */
3729 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3730 struct seq_list *elem);
3731 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3732 struct seq_list *elem);
3733 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3736 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3737 struct btrfs_path *path,
3738 u64 root_id, u64 ref_id);
3739 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3740 struct btrfs_root *tree_root,
3741 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3742 const char *name, int name_len);
3743 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3744 struct btrfs_root *tree_root,
3745 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3746 const char *name, int name_len);
3747 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3748 struct btrfs_key *key);
3749 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3750 *root, struct btrfs_key *key, struct btrfs_root_item
3752 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3753 struct btrfs_root *root,
3754 struct btrfs_key *key,
3755 struct btrfs_root_item *item);
3756 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3757 struct btrfs_path *path, struct btrfs_root_item *root_item,
3758 struct btrfs_key *root_key);
3759 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3760 void btrfs_set_root_node(struct btrfs_root_item *item,
3761 struct extent_buffer *node);
3762 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3763 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3764 struct btrfs_root *root);
3767 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3768 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3770 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3771 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3773 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3774 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3778 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3779 const char *name, int name_len);
3780 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3781 struct btrfs_root *root, const char *name,
3782 int name_len, struct inode *dir,
3783 struct btrfs_key *location, u8 type, u64 index);
3784 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3785 struct btrfs_root *root,
3786 struct btrfs_path *path, u64 dir,
3787 const char *name, int name_len,
3789 struct btrfs_dir_item *
3790 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3791 struct btrfs_root *root,
3792 struct btrfs_path *path, u64 dir,
3793 u64 objectid, const char *name, int name_len,
3795 struct btrfs_dir_item *
3796 btrfs_search_dir_index_item(struct btrfs_root *root,
3797 struct btrfs_path *path, u64 dirid,
3798 const char *name, int name_len);
3799 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3800 struct btrfs_root *root,
3801 struct btrfs_path *path,
3802 struct btrfs_dir_item *di);
3803 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3804 struct btrfs_root *root,
3805 struct btrfs_path *path, u64 objectid,
3806 const char *name, u16 name_len,
3807 const void *data, u16 data_len);
3808 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3809 struct btrfs_root *root,
3810 struct btrfs_path *path, u64 dir,
3811 const char *name, u16 name_len,
3813 int verify_dir_item(struct btrfs_root *root,
3814 struct extent_buffer *leaf,
3815 struct btrfs_dir_item *dir_item);
3816 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3817 struct btrfs_path *path,
3822 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3823 struct btrfs_root *root, u64 offset);
3824 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3825 struct btrfs_root *root, u64 offset);
3826 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3829 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3830 struct btrfs_root *root,
3831 const char *name, int name_len,
3832 u64 inode_objectid, u64 ref_objectid, u64 index);
3833 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3834 struct btrfs_root *root,
3835 const char *name, int name_len,
3836 u64 inode_objectid, u64 ref_objectid, u64 *index);
3837 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3838 struct btrfs_root *root,
3839 struct btrfs_path *path, u64 objectid);
3840 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3841 *root, struct btrfs_path *path,
3842 struct btrfs_key *location, int mod);
3844 struct btrfs_inode_extref *
3845 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3846 struct btrfs_root *root,
3847 struct btrfs_path *path,
3848 const char *name, int name_len,
3849 u64 inode_objectid, u64 ref_objectid, int ins_len,
3852 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3853 u64 ref_objectid, const char *name,
3855 struct btrfs_inode_extref **extref_ret);
3858 struct btrfs_dio_private;
3859 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3860 struct btrfs_root *root, u64 bytenr, u64 len);
3861 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3862 struct bio *bio, u32 *dst);
3863 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3864 struct bio *bio, u64 logical_offset);
3865 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3866 struct btrfs_root *root,
3867 u64 objectid, u64 pos,
3868 u64 disk_offset, u64 disk_num_bytes,
3869 u64 num_bytes, u64 offset, u64 ram_bytes,
3870 u8 compression, u8 encryption, u16 other_encoding);
3871 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3872 struct btrfs_root *root,
3873 struct btrfs_path *path, u64 objectid,
3874 u64 bytenr, int mod);
3875 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3876 struct btrfs_root *root,
3877 struct btrfs_ordered_sum *sums);
3878 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3879 struct bio *bio, u64 file_start, int contig);
3880 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3881 struct list_head *list, int search_commit);
3882 void btrfs_extent_item_to_extent_map(struct inode *inode,
3883 const struct btrfs_path *path,
3884 struct btrfs_file_extent_item *fi,
3885 const bool new_inline,
3886 struct extent_map *em);
3889 struct btrfs_delalloc_work {
3890 struct inode *inode;
3893 struct completion completion;
3894 struct list_head list;
3895 struct btrfs_work work;
3898 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3899 int wait, int delay_iput);
3900 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3902 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3903 size_t pg_offset, u64 start, u64 len,
3905 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3906 u64 *orig_start, u64 *orig_block_len,
3909 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3910 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3911 #define ClearPageChecked ClearPageFsMisc
3912 #define SetPageChecked SetPageFsMisc
3913 #define PageChecked PageFsMisc
3916 /* This forces readahead on a given range of bytes in an inode */
3917 static inline void btrfs_force_ra(struct address_space *mapping,
3918 struct file_ra_state *ra, struct file *file,
3919 pgoff_t offset, unsigned long req_size)
3921 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3924 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3925 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3926 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3927 struct btrfs_root *root,
3928 struct inode *dir, struct inode *inode,
3929 const char *name, int name_len);
3930 int btrfs_add_link(struct btrfs_trans_handle *trans,
3931 struct inode *parent_inode, struct inode *inode,
3932 const char *name, int name_len, int add_backref, u64 index);
3933 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3934 struct btrfs_root *root,
3935 struct inode *dir, u64 objectid,
3936 const char *name, int name_len);
3937 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3939 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3940 struct btrfs_root *root,
3941 struct inode *inode, u64 new_size,
3944 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3945 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3947 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3948 struct extent_state **cached_state);
3949 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3950 struct btrfs_root *new_root,
3951 struct btrfs_root *parent_root,
3953 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3954 size_t size, struct bio *bio,
3955 unsigned long bio_flags);
3956 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3957 int btrfs_readpage(struct file *file, struct page *page);
3958 void btrfs_evict_inode(struct inode *inode);
3959 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3960 struct inode *btrfs_alloc_inode(struct super_block *sb);
3961 void btrfs_destroy_inode(struct inode *inode);
3962 int btrfs_drop_inode(struct inode *inode);
3963 int btrfs_init_cachep(void);
3964 void btrfs_destroy_cachep(void);
3965 long btrfs_ioctl_trans_end(struct file *file);
3966 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3967 struct btrfs_root *root, int *was_new);
3968 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3969 size_t pg_offset, u64 start, u64 end,
3971 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3972 struct btrfs_root *root,
3973 struct inode *inode);
3974 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3975 struct btrfs_root *root, struct inode *inode);
3976 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3977 int btrfs_orphan_cleanup(struct btrfs_root *root);
3978 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3979 struct btrfs_root *root);
3980 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3981 void btrfs_invalidate_inodes(struct btrfs_root *root);
3982 void btrfs_add_delayed_iput(struct inode *inode);
3983 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3984 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3985 u64 start, u64 num_bytes, u64 min_size,
3986 loff_t actual_len, u64 *alloc_hint);
3987 int btrfs_prealloc_file_range_trans(struct inode *inode,
3988 struct btrfs_trans_handle *trans, int mode,
3989 u64 start, u64 num_bytes, u64 min_size,
3990 loff_t actual_len, u64 *alloc_hint);
3991 int btrfs_inode_check_errors(struct inode *inode);
3992 extern const struct dentry_operations btrfs_dentry_operations;
3993 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3994 void btrfs_test_inode_set_ops(struct inode *inode);
3998 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3999 void btrfs_update_iflags(struct inode *inode);
4000 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
4001 int btrfs_is_empty_uuid(u8 *uuid);
4002 int btrfs_defrag_file(struct inode *inode, struct file *file,
4003 struct btrfs_ioctl_defrag_range_args *range,
4004 u64 newer_than, unsigned long max_pages);
4005 void btrfs_get_block_group_info(struct list_head *groups_list,
4006 struct btrfs_ioctl_space_info *space);
4007 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
4008 struct btrfs_ioctl_balance_args *bargs);
4012 int btrfs_auto_defrag_init(void);
4013 void btrfs_auto_defrag_exit(void);
4014 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
4015 struct inode *inode);
4016 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
4017 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
4018 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
4019 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
4021 extern const struct file_operations btrfs_file_operations;
4022 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
4023 struct btrfs_root *root, struct inode *inode,
4024 struct btrfs_path *path, u64 start, u64 end,
4025 u64 *drop_end, int drop_cache,
4027 u32 extent_item_size,
4029 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
4030 struct btrfs_root *root, struct inode *inode, u64 start,
4031 u64 end, int drop_cache);
4032 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
4033 struct inode *inode, u64 start, u64 end);
4034 int btrfs_release_file(struct inode *inode, struct file *file);
4035 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
4036 struct page **pages, size_t num_pages,
4037 loff_t pos, size_t write_bytes,
4038 struct extent_state **cached);
4039 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
4042 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
4043 struct btrfs_root *root);
4046 int btrfs_init_sysfs(void);
4047 void btrfs_exit_sysfs(void);
4048 int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
4049 void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
4052 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
4055 int btrfs_parse_options(struct btrfs_root *root, char *options);
4056 int btrfs_sync_fs(struct super_block *sb, int wait);
4058 #ifdef CONFIG_PRINTK
4060 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4062 static inline __printf(2, 3)
4063 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4068 #define btrfs_emerg(fs_info, fmt, args...) \
4069 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4070 #define btrfs_alert(fs_info, fmt, args...) \
4071 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4072 #define btrfs_crit(fs_info, fmt, args...) \
4073 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4074 #define btrfs_err(fs_info, fmt, args...) \
4075 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4076 #define btrfs_warn(fs_info, fmt, args...) \
4077 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4078 #define btrfs_notice(fs_info, fmt, args...) \
4079 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4080 #define btrfs_info(fs_info, fmt, args...) \
4081 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4084 #define btrfs_debug(fs_info, fmt, args...) \
4085 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4087 #define btrfs_debug(fs_info, fmt, args...) \
4088 no_printk(KERN_DEBUG fmt, ##args)
4091 #ifdef CONFIG_BTRFS_ASSERT
4094 static inline void assfail(char *expr, char *file, int line)
4096 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4101 #define ASSERT(expr) \
4102 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4104 #define ASSERT(expr) ((void)0)
4107 #define btrfs_assert()
4110 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
4111 unsigned int line, int errno, const char *fmt, ...);
4113 const char *btrfs_decode_error(int errno);
4116 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
4117 struct btrfs_root *root, const char *function,
4118 unsigned int line, int errno);
4120 #define btrfs_set_fs_incompat(__fs_info, opt) \
4121 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4123 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
4126 struct btrfs_super_block *disk_super;
4129 disk_super = fs_info->super_copy;
4130 features = btrfs_super_incompat_flags(disk_super);
4131 if (!(features & flag)) {
4132 spin_lock(&fs_info->super_lock);
4133 features = btrfs_super_incompat_flags(disk_super);
4134 if (!(features & flag)) {
4136 btrfs_set_super_incompat_flags(disk_super, features);
4137 btrfs_info(fs_info, "setting %llu feature flag",
4140 spin_unlock(&fs_info->super_lock);
4144 #define btrfs_clear_fs_incompat(__fs_info, opt) \
4145 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4147 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
4150 struct btrfs_super_block *disk_super;
4153 disk_super = fs_info->super_copy;
4154 features = btrfs_super_incompat_flags(disk_super);
4155 if (features & flag) {
4156 spin_lock(&fs_info->super_lock);
4157 features = btrfs_super_incompat_flags(disk_super);
4158 if (features & flag) {
4160 btrfs_set_super_incompat_flags(disk_super, features);
4161 btrfs_info(fs_info, "clearing %llu feature flag",
4164 spin_unlock(&fs_info->super_lock);
4168 #define btrfs_fs_incompat(fs_info, opt) \
4169 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4171 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4173 struct btrfs_super_block *disk_super;
4174 disk_super = fs_info->super_copy;
4175 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4178 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
4179 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4181 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
4184 struct btrfs_super_block *disk_super;
4187 disk_super = fs_info->super_copy;
4188 features = btrfs_super_compat_ro_flags(disk_super);
4189 if (!(features & flag)) {
4190 spin_lock(&fs_info->super_lock);
4191 features = btrfs_super_compat_ro_flags(disk_super);
4192 if (!(features & flag)) {
4194 btrfs_set_super_compat_ro_flags(disk_super, features);
4195 btrfs_info(fs_info, "setting %llu ro feature flag",
4198 spin_unlock(&fs_info->super_lock);
4202 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
4203 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4205 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
4208 struct btrfs_super_block *disk_super;
4211 disk_super = fs_info->super_copy;
4212 features = btrfs_super_compat_ro_flags(disk_super);
4213 if (features & flag) {
4214 spin_lock(&fs_info->super_lock);
4215 features = btrfs_super_compat_ro_flags(disk_super);
4216 if (features & flag) {
4218 btrfs_set_super_compat_ro_flags(disk_super, features);
4219 btrfs_info(fs_info, "clearing %llu ro feature flag",
4222 spin_unlock(&fs_info->super_lock);
4226 #define btrfs_fs_compat_ro(fs_info, opt) \
4227 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4229 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
4231 struct btrfs_super_block *disk_super;
4232 disk_super = fs_info->super_copy;
4233 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
4237 * Call btrfs_abort_transaction as early as possible when an error condition is
4238 * detected, that way the exact line number is reported.
4240 #define btrfs_abort_transaction(trans, root, errno) \
4242 /* Report first abort since mount */ \
4243 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
4244 &((root)->fs_info->fs_state))) { \
4245 WARN(1, KERN_DEBUG \
4246 "BTRFS: Transaction aborted (error %d)\n", \
4249 __btrfs_abort_transaction((trans), (root), __func__, \
4250 __LINE__, (errno)); \
4253 #define btrfs_std_error(fs_info, errno) \
4256 __btrfs_std_error((fs_info), __func__, \
4257 __LINE__, (errno), NULL); \
4260 #define btrfs_error(fs_info, errno, fmt, args...) \
4262 __btrfs_std_error((fs_info), __func__, __LINE__, \
4263 (errno), fmt, ##args); \
4268 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4269 unsigned int line, int errno, const char *fmt, ...);
4272 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4273 * will panic(). Otherwise we BUG() here.
4275 #define btrfs_panic(fs_info, errno, fmt, args...) \
4277 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4282 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4283 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4284 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4285 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4286 struct inode *inode, struct inode *dir);
4288 #define btrfs_get_acl NULL
4289 #define btrfs_set_acl NULL
4290 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4291 struct inode *inode, struct inode *dir)
4298 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4299 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4300 struct btrfs_root *root);
4301 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4302 struct btrfs_root *root);
4303 int btrfs_recover_relocation(struct btrfs_root *root);
4304 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4305 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4306 struct btrfs_root *root, struct extent_buffer *buf,
4307 struct extent_buffer *cow);
4308 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
4309 u64 *bytes_to_reserve);
4310 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4311 struct btrfs_pending_snapshot *pending);
4314 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4315 u64 end, struct btrfs_scrub_progress *progress,
4316 int readonly, int is_dev_replace);
4317 void btrfs_scrub_pause(struct btrfs_root *root);
4318 void btrfs_scrub_continue(struct btrfs_root *root);
4319 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4320 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4321 struct btrfs_device *dev);
4322 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4323 struct btrfs_scrub_progress *progress);
4326 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4327 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4328 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
4330 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
4332 btrfs_bio_counter_sub(fs_info, 1);
4336 struct reada_control {
4337 struct btrfs_root *root; /* tree to prefetch */
4338 struct btrfs_key key_start;
4339 struct btrfs_key key_end; /* exclusive */
4342 wait_queue_head_t wait;
4344 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4345 struct btrfs_key *start, struct btrfs_key *end);
4346 int btrfs_reada_wait(void *handle);
4347 void btrfs_reada_detach(void *handle);
4348 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4349 u64 start, int err);
4351 static inline int is_fstree(u64 rootid)
4353 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4354 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
4355 !btrfs_qgroup_level(rootid)))
4360 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4362 return signal_pending(current);
4365 /* Sanity test specific functions */
4366 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4367 void btrfs_test_destroy_inode(struct inode *inode);
4370 static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
4372 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4373 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))