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 "extent_io.h"
37 #include "extent_map.h"
38 #include "async-thread.h"
40 struct btrfs_trans_handle;
41 struct btrfs_transaction;
42 struct btrfs_pending_snapshot;
43 extern struct kmem_cache *btrfs_trans_handle_cachep;
44 extern struct kmem_cache *btrfs_transaction_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 struct btrfs_ordered_sum;
50 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
51 #define STATIC noinline
53 #define STATIC static noinline
56 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
58 #define BTRFS_MAX_MIRRORS 3
60 #define BTRFS_MAX_LEVEL 8
62 #define BTRFS_COMPAT_EXTENT_TREE_V0
65 * files bigger than this get some pre-flushing when they are added
66 * to the ordered operations list. That way we limit the total
67 * work done by the commit
69 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
71 /* holds pointers to all of the tree roots */
72 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
74 /* stores information about which extents are in use, and reference counts */
75 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
78 * chunk tree stores translations from logical -> physical block numbering
79 * the super block points to the chunk tree
81 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
84 * stores information about which areas of a given device are in use.
85 * one per device. The tree of tree roots points to the device tree
87 #define BTRFS_DEV_TREE_OBJECTID 4ULL
89 /* one per subvolume, storing files and directories */
90 #define BTRFS_FS_TREE_OBJECTID 5ULL
92 /* directory objectid inside the root tree */
93 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
95 /* holds checksums of all the data extents */
96 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
98 /* holds quota configuration and tracking */
99 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
101 /* for storing items that use the BTRFS_UUID_KEY* types */
102 #define BTRFS_UUID_TREE_OBJECTID 9ULL
104 /* for storing balance parameters in the root tree */
105 #define BTRFS_BALANCE_OBJECTID -4ULL
107 /* orhpan objectid for tracking unlinked/truncated files */
108 #define BTRFS_ORPHAN_OBJECTID -5ULL
110 /* does write ahead logging to speed up fsyncs */
111 #define BTRFS_TREE_LOG_OBJECTID -6ULL
112 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
114 /* for space balancing */
115 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
116 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
119 * extent checksums all have this objectid
120 * this allows them to share the logging tree
123 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
125 /* For storing free space cache */
126 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
129 * The inode number assigned to the special inode for storing
132 #define BTRFS_FREE_INO_OBJECTID -12ULL
134 /* dummy objectid represents multiple objectids */
135 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
138 * All files have objectids in this range.
140 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
141 #define BTRFS_LAST_FREE_OBJECTID -256ULL
142 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
146 * the device items go into the chunk tree. The key is in the form
147 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
149 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
151 #define BTRFS_BTREE_INODE_OBJECTID 1
153 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
155 #define BTRFS_DEV_REPLACE_DEVID 0ULL
158 * the max metadata block size. This limit is somewhat artificial,
159 * but the memmove costs go through the roof for larger blocks.
161 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
164 * we can actually store much bigger names, but lets not confuse the rest
167 #define BTRFS_NAME_LEN 255
170 * Theoretical limit is larger, but we keep this down to a sane
171 * value. That should limit greatly the possibility of collisions on
174 #define BTRFS_LINK_MAX 65535U
176 /* 32 bytes in various csum fields */
177 #define BTRFS_CSUM_SIZE 32
180 #define BTRFS_CSUM_TYPE_CRC32 0
182 static int btrfs_csum_sizes[] = { 4, 0 };
184 /* four bytes for CRC32 */
185 #define BTRFS_EMPTY_DIR_SIZE 0
187 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
188 #define REQ_GET_READ_MIRRORS (1 << 30)
190 #define BTRFS_FT_UNKNOWN 0
191 #define BTRFS_FT_REG_FILE 1
192 #define BTRFS_FT_DIR 2
193 #define BTRFS_FT_CHRDEV 3
194 #define BTRFS_FT_BLKDEV 4
195 #define BTRFS_FT_FIFO 5
196 #define BTRFS_FT_SOCK 6
197 #define BTRFS_FT_SYMLINK 7
198 #define BTRFS_FT_XATTR 8
199 #define BTRFS_FT_MAX 9
201 /* ioprio of readahead is set to idle */
202 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
204 #define BTRFS_DIRTY_METADATA_THRESH (32 * 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
355 /* Super block flags */
356 /* Errors detected */
357 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
359 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
360 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
362 #define BTRFS_BACKREF_REV_MAX 256
363 #define BTRFS_BACKREF_REV_SHIFT 56
364 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
365 BTRFS_BACKREF_REV_SHIFT)
367 #define BTRFS_OLD_BACKREF_REV 0
368 #define BTRFS_MIXED_BACKREF_REV 1
371 * every tree block (leaf or node) starts with this header.
373 struct btrfs_header {
374 /* these first four must match the super block */
375 u8 csum[BTRFS_CSUM_SIZE];
376 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
377 __le64 bytenr; /* which block this node is supposed to live in */
380 /* allowed to be different from the super from here on down */
381 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
386 } __attribute__ ((__packed__));
388 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
389 sizeof(struct btrfs_header)) / \
390 sizeof(struct btrfs_key_ptr))
391 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
392 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
393 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
394 sizeof(struct btrfs_item) - \
395 sizeof(struct btrfs_file_extent_item))
396 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
397 sizeof(struct btrfs_item) -\
398 sizeof(struct btrfs_dir_item))
402 * this is a very generous portion of the super block, giving us
403 * room to translate 14 chunks with 3 stripes each.
405 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
406 #define BTRFS_LABEL_SIZE 256
409 * just in case we somehow lose the roots and are not able to mount,
410 * we store an array of the roots from previous transactions
413 #define BTRFS_NUM_BACKUP_ROOTS 4
414 struct btrfs_root_backup {
416 __le64 tree_root_gen;
419 __le64 chunk_root_gen;
422 __le64 extent_root_gen;
431 __le64 csum_root_gen;
441 u8 extent_root_level;
445 /* future and to align */
447 } __attribute__ ((__packed__));
450 * the super block basically lists the main trees of the FS
451 * it currently lacks any block count etc etc
453 struct btrfs_super_block {
454 u8 csum[BTRFS_CSUM_SIZE];
455 /* the first 4 fields must match struct btrfs_header */
456 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
457 __le64 bytenr; /* this block number */
460 /* allowed to be different from the btrfs_header from here own down */
467 /* this will help find the new super based on the log root */
468 __le64 log_root_transid;
471 __le64 root_dir_objectid;
477 __le32 sys_chunk_array_size;
478 __le64 chunk_root_generation;
480 __le64 compat_ro_flags;
481 __le64 incompat_flags;
486 struct btrfs_dev_item dev_item;
488 char label[BTRFS_LABEL_SIZE];
490 __le64 cache_generation;
491 __le64 uuid_tree_generation;
493 /* future expansion */
495 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
496 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
497 } __attribute__ ((__packed__));
500 * Compat flags that we support. If any incompat flags are set other than the
501 * ones specified below then we will fail to mount
503 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
504 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
505 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
506 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
508 * some patches floated around with a second compression method
509 * lets save that incompat here for when they do get in
510 * Note we don't actually support it, we're just reserving the
513 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
516 * older kernels tried to do bigger metadata blocks, but the
517 * code was pretty buggy. Lets not let them try anymore.
519 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
521 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
522 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
523 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
524 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
526 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
527 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
528 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
529 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
530 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
531 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
533 #define BTRFS_FEATURE_INCOMPAT_SUPP \
534 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
535 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
536 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
537 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
538 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
539 BTRFS_FEATURE_INCOMPAT_RAID56 | \
540 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
541 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
542 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
544 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
545 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
546 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
549 * A leaf is full of items. offset and size tell us where to find
550 * the item in the leaf (relative to the start of the data area)
553 struct btrfs_disk_key key;
556 } __attribute__ ((__packed__));
559 * leaves have an item area and a data area:
560 * [item0, item1....itemN] [free space] [dataN...data1, data0]
562 * The data is separate from the items to get the keys closer together
566 struct btrfs_header header;
567 struct btrfs_item items[];
568 } __attribute__ ((__packed__));
571 * all non-leaf blocks are nodes, they hold only keys and pointers to
574 struct btrfs_key_ptr {
575 struct btrfs_disk_key key;
578 } __attribute__ ((__packed__));
581 struct btrfs_header header;
582 struct btrfs_key_ptr ptrs[];
583 } __attribute__ ((__packed__));
586 * btrfs_paths remember the path taken from the root down to the leaf.
587 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
588 * to any other levels that are present.
590 * The slots array records the index of the item or block pointer
591 * used while walking the tree.
594 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
595 int slots[BTRFS_MAX_LEVEL];
596 /* if there is real range locking, this locks field will change */
597 int locks[BTRFS_MAX_LEVEL];
599 /* keep some upper locks as we walk down */
603 * set by btrfs_split_item, tells search_slot to keep all locks
604 * and to force calls to keep space in the nodes
606 unsigned int search_for_split:1;
607 unsigned int keep_locks:1;
608 unsigned int skip_locking:1;
609 unsigned int leave_spinning:1;
610 unsigned int search_commit_root:1;
614 * items in the extent btree are used to record the objectid of the
615 * owner of the block and the number of references
618 struct btrfs_extent_item {
622 } __attribute__ ((__packed__));
624 struct btrfs_extent_item_v0 {
626 } __attribute__ ((__packed__));
628 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
629 sizeof(struct btrfs_item))
631 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
632 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
634 /* following flags only apply to tree blocks */
636 /* use full backrefs for extent pointers in the block */
637 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
640 * this flag is only used internally by scrub and may be changed at any time
641 * it is only declared here to avoid collisions
643 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
645 struct btrfs_tree_block_info {
646 struct btrfs_disk_key key;
648 } __attribute__ ((__packed__));
650 struct btrfs_extent_data_ref {
655 } __attribute__ ((__packed__));
657 struct btrfs_shared_data_ref {
659 } __attribute__ ((__packed__));
661 struct btrfs_extent_inline_ref {
664 } __attribute__ ((__packed__));
666 /* old style backrefs item */
667 struct btrfs_extent_ref_v0 {
672 } __attribute__ ((__packed__));
675 /* dev extents record free space on individual devices. The owner
676 * field points back to the chunk allocation mapping tree that allocated
677 * the extent. The chunk tree uuid field is a way to double check the owner
679 struct btrfs_dev_extent {
681 __le64 chunk_objectid;
684 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
685 } __attribute__ ((__packed__));
687 struct btrfs_inode_ref {
691 } __attribute__ ((__packed__));
693 struct btrfs_inode_extref {
694 __le64 parent_objectid;
699 } __attribute__ ((__packed__));
701 struct btrfs_timespec {
704 } __attribute__ ((__packed__));
706 enum btrfs_compression_type {
707 BTRFS_COMPRESS_NONE = 0,
708 BTRFS_COMPRESS_ZLIB = 1,
709 BTRFS_COMPRESS_LZO = 2,
710 BTRFS_COMPRESS_TYPES = 2,
711 BTRFS_COMPRESS_LAST = 3,
714 struct btrfs_inode_item {
715 /* nfs style generation number */
717 /* transid that last touched this inode */
729 /* modification sequence number for NFS */
733 * a little future expansion, for more than this we can
734 * just grow the inode item and version it
737 struct btrfs_timespec atime;
738 struct btrfs_timespec ctime;
739 struct btrfs_timespec mtime;
740 struct btrfs_timespec otime;
741 } __attribute__ ((__packed__));
743 struct btrfs_dir_log_item {
745 } __attribute__ ((__packed__));
747 struct btrfs_dir_item {
748 struct btrfs_disk_key location;
753 } __attribute__ ((__packed__));
755 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
757 struct btrfs_root_item {
758 struct btrfs_inode_item inode;
764 __le64 last_snapshot;
767 struct btrfs_disk_key drop_progress;
772 * The following fields appear after subvol_uuids+subvol_times
777 * This generation number is used to test if the new fields are valid
778 * and up to date while reading the root item. Everytime the root item
779 * is written out, the "generation" field is copied into this field. If
780 * anyone ever mounted the fs with an older kernel, we will have
781 * mismatching generation values here and thus must invalidate the
782 * new fields. See btrfs_update_root and btrfs_find_last_root for
784 * the offset of generation_v2 is also used as the start for the memset
785 * when invalidating the fields.
787 __le64 generation_v2;
788 u8 uuid[BTRFS_UUID_SIZE];
789 u8 parent_uuid[BTRFS_UUID_SIZE];
790 u8 received_uuid[BTRFS_UUID_SIZE];
791 __le64 ctransid; /* updated when an inode changes */
792 __le64 otransid; /* trans when created */
793 __le64 stransid; /* trans when sent. non-zero for received subvol */
794 __le64 rtransid; /* trans when received. non-zero for received subvol */
795 struct btrfs_timespec ctime;
796 struct btrfs_timespec otime;
797 struct btrfs_timespec stime;
798 struct btrfs_timespec rtime;
799 __le64 reserved[8]; /* for future */
800 } __attribute__ ((__packed__));
803 * this is used for both forward and backward root refs
805 struct btrfs_root_ref {
809 } __attribute__ ((__packed__));
811 struct btrfs_disk_balance_args {
813 * profiles to operate on, single is denoted by
814 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
824 /* devid subset filter [pstart..pend) */
828 /* btrfs virtual address space subset filter [vstart..vend) */
833 * profile to convert to, single is denoted by
834 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
838 /* BTRFS_BALANCE_ARGS_* */
842 } __attribute__ ((__packed__));
845 * store balance parameters to disk so that balance can be properly
846 * resumed after crash or unmount
848 struct btrfs_balance_item {
849 /* BTRFS_BALANCE_* */
852 struct btrfs_disk_balance_args data;
853 struct btrfs_disk_balance_args meta;
854 struct btrfs_disk_balance_args sys;
857 } __attribute__ ((__packed__));
859 #define BTRFS_FILE_EXTENT_INLINE 0
860 #define BTRFS_FILE_EXTENT_REG 1
861 #define BTRFS_FILE_EXTENT_PREALLOC 2
863 struct btrfs_file_extent_item {
865 * transaction id that created this extent
869 * max number of bytes to hold this extent in ram
870 * when we split a compressed extent we can't know how big
871 * each of the resulting pieces will be. So, this is
872 * an upper limit on the size of the extent in ram instead of
878 * 32 bits for the various ways we might encode the data,
879 * including compression and encryption. If any of these
880 * are set to something a given disk format doesn't understand
881 * it is treated like an incompat flag for reading and writing,
886 __le16 other_encoding; /* spare for later use */
888 /* are we inline data or a real extent? */
892 * disk space consumed by the extent, checksum blocks are included
896 __le64 disk_num_bytes;
898 * the logical offset in file blocks (no csums)
899 * this extent record is for. This allows a file extent to point
900 * into the middle of an existing extent on disk, sharing it
901 * between two snapshots (useful if some bytes in the middle of the
902 * extent have changed
906 * the logical number of file blocks (no csums included). This
907 * always reflects the size uncompressed and without encoding.
911 } __attribute__ ((__packed__));
913 struct btrfs_csum_item {
915 } __attribute__ ((__packed__));
917 struct btrfs_dev_stats_item {
919 * grow this item struct at the end for future enhancements and keep
920 * the existing values unchanged
922 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
923 } __attribute__ ((__packed__));
925 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
926 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
927 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
928 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
929 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
930 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
931 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
933 struct btrfs_dev_replace {
934 u64 replace_state; /* see #define above */
935 u64 time_started; /* seconds since 1-Jan-1970 */
936 u64 time_stopped; /* seconds since 1-Jan-1970 */
937 atomic64_t num_write_errors;
938 atomic64_t num_uncorrectable_read_errors;
941 u64 committed_cursor_left;
942 u64 cursor_left_last_write_of_item;
945 u64 cont_reading_from_srcdev_mode; /* see #define above */
948 int item_needs_writeback;
949 struct btrfs_device *srcdev;
950 struct btrfs_device *tgtdev;
953 atomic_t nesting_level;
954 struct mutex lock_finishing_cancel_unmount;
955 struct mutex lock_management_lock;
958 struct btrfs_scrub_progress scrub_progress;
961 struct btrfs_dev_replace_item {
963 * grow this item struct at the end for future enhancements and keep
964 * the existing values unchanged
969 __le64 cont_reading_from_srcdev_mode;
971 __le64 replace_state;
974 __le64 num_write_errors;
975 __le64 num_uncorrectable_read_errors;
976 } __attribute__ ((__packed__));
978 /* different types of block groups (and chunks) */
979 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
980 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
981 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
982 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
983 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
984 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
985 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
986 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
987 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
988 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
990 enum btrfs_raid_types {
1001 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1002 BTRFS_BLOCK_GROUP_SYSTEM | \
1003 BTRFS_BLOCK_GROUP_METADATA)
1005 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1006 BTRFS_BLOCK_GROUP_RAID1 | \
1007 BTRFS_BLOCK_GROUP_RAID5 | \
1008 BTRFS_BLOCK_GROUP_RAID6 | \
1009 BTRFS_BLOCK_GROUP_DUP | \
1010 BTRFS_BLOCK_GROUP_RAID10)
1012 * We need a bit for restriper to be able to tell when chunks of type
1013 * SINGLE are available. This "extended" profile format is used in
1014 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1015 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1016 * to avoid remappings between two formats in future.
1018 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1020 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1021 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1023 static inline u64 chunk_to_extended(u64 flags)
1025 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1026 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1030 static inline u64 extended_to_chunk(u64 flags)
1032 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1035 struct btrfs_block_group_item {
1037 __le64 chunk_objectid;
1039 } __attribute__ ((__packed__));
1042 * is subvolume quota turned on?
1044 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1046 * RESCAN is set during the initialization phase
1048 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1050 * Some qgroup entries are known to be out of date,
1051 * either because the configuration has changed in a way that
1052 * makes a rescan necessary, or because the fs has been mounted
1053 * with a non-qgroup-aware version.
1054 * Turning qouta off and on again makes it inconsistent, too.
1056 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1058 #define BTRFS_QGROUP_STATUS_VERSION 1
1060 struct btrfs_qgroup_status_item {
1063 * the generation is updated during every commit. As older
1064 * versions of btrfs are not aware of qgroups, it will be
1065 * possible to detect inconsistencies by checking the
1066 * generation on mount time
1070 /* flag definitions see above */
1074 * only used during scanning to record the progress
1075 * of the scan. It contains a logical address
1078 } __attribute__ ((__packed__));
1080 struct btrfs_qgroup_info_item {
1086 } __attribute__ ((__packed__));
1088 /* flags definition for qgroup limits */
1089 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1090 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1091 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1092 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1093 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1094 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1096 struct btrfs_qgroup_limit_item {
1098 * only updated when any of the other values change
1105 } __attribute__ ((__packed__));
1107 /* For raid type sysfs entries */
1108 struct raid_kobject {
1110 struct kobject kobj;
1113 struct btrfs_space_info {
1116 u64 total_bytes; /* total bytes in the space,
1117 this doesn't take mirrors into account */
1118 u64 bytes_used; /* total bytes used,
1119 this doesn't take mirrors into account */
1120 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1121 transaction finishes */
1122 u64 bytes_reserved; /* total bytes the allocator has reserved for
1123 current allocations */
1124 u64 bytes_may_use; /* number of bytes that may be used for
1125 delalloc/allocations */
1126 u64 bytes_readonly; /* total bytes that are read only */
1128 unsigned int full:1; /* indicates that we cannot allocate any more
1129 chunks for this space */
1130 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1132 unsigned int flush:1; /* set if we are trying to make space */
1134 unsigned int force_alloc; /* set if we need to force a chunk
1135 alloc for this space */
1137 u64 disk_used; /* total bytes used on disk */
1138 u64 disk_total; /* total bytes on disk, takes mirrors into
1144 * bytes_pinned is kept in line with what is actually pinned, as in
1145 * we've called update_block_group and dropped the bytes_used counter
1146 * and increased the bytes_pinned counter. However this means that
1147 * bytes_pinned does not reflect the bytes that will be pinned once the
1148 * delayed refs are flushed, so this counter is inc'ed everytime we call
1149 * btrfs_free_extent so it is a realtime count of what will be freed
1150 * once the transaction is committed. It will be zero'ed everytime the
1151 * transaction commits.
1153 struct percpu_counter total_bytes_pinned;
1155 struct list_head list;
1157 struct rw_semaphore groups_sem;
1158 /* for block groups in our same type */
1159 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1160 wait_queue_head_t wait;
1162 struct kobject kobj;
1163 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1166 #define BTRFS_BLOCK_RSV_GLOBAL 1
1167 #define BTRFS_BLOCK_RSV_DELALLOC 2
1168 #define BTRFS_BLOCK_RSV_TRANS 3
1169 #define BTRFS_BLOCK_RSV_CHUNK 4
1170 #define BTRFS_BLOCK_RSV_DELOPS 5
1171 #define BTRFS_BLOCK_RSV_EMPTY 6
1172 #define BTRFS_BLOCK_RSV_TEMP 7
1174 struct btrfs_block_rsv {
1177 struct btrfs_space_info *space_info;
1179 unsigned short full;
1180 unsigned short type;
1181 unsigned short failfast;
1185 * free clusters are used to claim free space in relatively large chunks,
1186 * allowing us to do less seeky writes. They are used for all metadata
1187 * allocations and data allocations in ssd mode.
1189 struct btrfs_free_cluster {
1191 spinlock_t refill_lock;
1192 struct rb_root root;
1194 /* largest extent in this cluster */
1197 /* first extent starting offset */
1200 struct btrfs_block_group_cache *block_group;
1202 * when a cluster is allocated from a block group, we put the
1203 * cluster onto a list in the block group so that it can
1204 * be freed before the block group is freed.
1206 struct list_head block_group_list;
1209 enum btrfs_caching_type {
1211 BTRFS_CACHE_STARTED = 1,
1212 BTRFS_CACHE_FAST = 2,
1213 BTRFS_CACHE_FINISHED = 3,
1214 BTRFS_CACHE_ERROR = 4,
1217 enum btrfs_disk_cache_state {
1218 BTRFS_DC_WRITTEN = 0,
1222 BTRFS_DC_NEED_WRITE = 4,
1225 struct btrfs_caching_control {
1226 struct list_head list;
1228 wait_queue_head_t wait;
1229 struct btrfs_work work;
1230 struct btrfs_block_group_cache *block_group;
1235 struct btrfs_block_group_cache {
1236 struct btrfs_key key;
1237 struct btrfs_block_group_item item;
1238 struct btrfs_fs_info *fs_info;
1239 struct inode *inode;
1246 u64 cache_generation;
1248 /* for raid56, this is a full stripe, without parity */
1249 unsigned long full_stripe_len;
1252 unsigned int dirty:1;
1253 unsigned int iref:1;
1255 int disk_cache_state;
1257 /* cache tracking stuff */
1259 struct btrfs_caching_control *caching_ctl;
1260 u64 last_byte_to_unpin;
1262 struct btrfs_space_info *space_info;
1264 /* free space cache stuff */
1265 struct btrfs_free_space_ctl *free_space_ctl;
1267 /* block group cache stuff */
1268 struct rb_node cache_node;
1270 /* for block groups in the same raid type */
1271 struct list_head list;
1276 /* List of struct btrfs_free_clusters for this block group.
1277 * Today it will only have one thing on it, but that may change
1279 struct list_head cluster_list;
1281 /* For delayed block group creation */
1282 struct list_head new_bg_list;
1285 /* delayed seq elem */
1287 struct list_head list;
1291 enum btrfs_orphan_cleanup_state {
1292 ORPHAN_CLEANUP_STARTED = 1,
1293 ORPHAN_CLEANUP_DONE = 2,
1296 /* used by the raid56 code to lock stripes for read/modify/write */
1297 struct btrfs_stripe_hash {
1298 struct list_head hash_list;
1299 wait_queue_head_t wait;
1303 /* used by the raid56 code to lock stripes for read/modify/write */
1304 struct btrfs_stripe_hash_table {
1305 struct list_head stripe_cache;
1306 spinlock_t cache_lock;
1308 struct btrfs_stripe_hash table[];
1311 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1314 struct reloc_control;
1315 struct btrfs_device;
1316 struct btrfs_fs_devices;
1317 struct btrfs_balance_control;
1318 struct btrfs_delayed_root;
1319 struct btrfs_fs_info {
1320 u8 fsid[BTRFS_FSID_SIZE];
1321 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1322 struct btrfs_root *extent_root;
1323 struct btrfs_root *tree_root;
1324 struct btrfs_root *chunk_root;
1325 struct btrfs_root *dev_root;
1326 struct btrfs_root *fs_root;
1327 struct btrfs_root *csum_root;
1328 struct btrfs_root *quota_root;
1329 struct btrfs_root *uuid_root;
1331 /* the log root tree is a directory of all the other log roots */
1332 struct btrfs_root *log_root_tree;
1334 spinlock_t fs_roots_radix_lock;
1335 struct radix_tree_root fs_roots_radix;
1337 /* block group cache stuff */
1338 spinlock_t block_group_cache_lock;
1339 u64 first_logical_byte;
1340 struct rb_root block_group_cache_tree;
1342 /* keep track of unallocated space */
1343 spinlock_t free_chunk_lock;
1344 u64 free_chunk_space;
1346 struct extent_io_tree freed_extents[2];
1347 struct extent_io_tree *pinned_extents;
1349 /* logical->physical extent mapping */
1350 struct btrfs_mapping_tree mapping_tree;
1353 * block reservation for extent, checksum, root tree and
1354 * delayed dir index item
1356 struct btrfs_block_rsv global_block_rsv;
1357 /* block reservation for delay allocation */
1358 struct btrfs_block_rsv delalloc_block_rsv;
1359 /* block reservation for metadata operations */
1360 struct btrfs_block_rsv trans_block_rsv;
1361 /* block reservation for chunk tree */
1362 struct btrfs_block_rsv chunk_block_rsv;
1363 /* block reservation for delayed operations */
1364 struct btrfs_block_rsv delayed_block_rsv;
1366 struct btrfs_block_rsv empty_block_rsv;
1369 u64 last_trans_committed;
1370 u64 avg_delayed_ref_runtime;
1373 * this is updated to the current trans every time a full commit
1374 * is required instead of the faster short fsync log commits
1376 u64 last_trans_log_full_commit;
1377 unsigned long mount_opt;
1378 unsigned long compress_type:4;
1379 int commit_interval;
1381 * It is a suggestive number, the read side is safe even it gets a
1382 * wrong number because we will write out the data into a regular
1383 * extent. The write side(mount/remount) is under ->s_umount lock,
1384 * so it is also safe.
1388 * Protected by ->chunk_mutex and sb->s_umount.
1390 * The reason that we use two lock to protect it is because only
1391 * remount and mount operations can change it and these two operations
1392 * are under sb->s_umount, but the read side (chunk allocation) can not
1393 * acquire sb->s_umount or the deadlock would happen. So we use two
1394 * locks to protect it. On the write side, we must acquire two locks,
1395 * and on the read side, we just need acquire one of them.
1398 struct btrfs_transaction *running_transaction;
1399 wait_queue_head_t transaction_throttle;
1400 wait_queue_head_t transaction_wait;
1401 wait_queue_head_t transaction_blocked_wait;
1402 wait_queue_head_t async_submit_wait;
1405 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1406 * when they are updated.
1408 * Because we do not clear the flags for ever, so we needn't use
1409 * the lock on the read side.
1411 * We also needn't use the lock when we mount the fs, because
1412 * there is no other task which will update the flag.
1414 spinlock_t super_lock;
1415 struct btrfs_super_block *super_copy;
1416 struct btrfs_super_block *super_for_commit;
1417 struct block_device *__bdev;
1418 struct super_block *sb;
1419 struct inode *btree_inode;
1420 struct backing_dev_info bdi;
1421 struct mutex tree_log_mutex;
1422 struct mutex transaction_kthread_mutex;
1423 struct mutex cleaner_mutex;
1424 struct mutex chunk_mutex;
1425 struct mutex volume_mutex;
1427 /* this is used during read/modify/write to make sure
1428 * no two ios are trying to mod the same stripe at the same
1431 struct btrfs_stripe_hash_table *stripe_hash_table;
1434 * this protects the ordered operations list only while we are
1435 * processing all of the entries on it. This way we make
1436 * sure the commit code doesn't find the list temporarily empty
1437 * because another function happens to be doing non-waiting preflush
1438 * before jumping into the main commit.
1440 struct mutex ordered_operations_mutex;
1443 * Same as ordered_operations_mutex except this is for ordered extents
1444 * and not the operations.
1446 struct mutex ordered_extent_flush_mutex;
1448 struct rw_semaphore extent_commit_sem;
1450 struct rw_semaphore cleanup_work_sem;
1452 struct rw_semaphore subvol_sem;
1453 struct srcu_struct subvol_srcu;
1455 spinlock_t trans_lock;
1457 * the reloc mutex goes with the trans lock, it is taken
1458 * during commit to protect us from the relocation code
1460 struct mutex reloc_mutex;
1462 struct list_head trans_list;
1463 struct list_head dead_roots;
1464 struct list_head caching_block_groups;
1466 spinlock_t delayed_iput_lock;
1467 struct list_head delayed_iputs;
1469 /* this protects tree_mod_seq_list */
1470 spinlock_t tree_mod_seq_lock;
1471 atomic64_t tree_mod_seq;
1472 struct list_head tree_mod_seq_list;
1474 /* this protects tree_mod_log */
1475 rwlock_t tree_mod_log_lock;
1476 struct rb_root tree_mod_log;
1478 atomic_t nr_async_submits;
1479 atomic_t async_submit_draining;
1480 atomic_t nr_async_bios;
1481 atomic_t async_delalloc_pages;
1482 atomic_t open_ioctl_trans;
1485 * this is used to protect the following list -- ordered_roots.
1487 spinlock_t ordered_root_lock;
1490 * all fs/file tree roots in which there are data=ordered extents
1491 * pending writeback are added into this list.
1493 * these can span multiple transactions and basically include
1494 * every dirty data page that isn't from nodatacow
1496 struct list_head ordered_roots;
1498 spinlock_t delalloc_root_lock;
1499 /* all fs/file tree roots that have delalloc inodes. */
1500 struct list_head delalloc_roots;
1503 * there is a pool of worker threads for checksumming during writes
1504 * and a pool for checksumming after reads. This is because readers
1505 * can run with FS locks held, and the writers may be waiting for
1506 * those locks. We don't want ordering in the pending list to cause
1507 * deadlocks, and so the two are serviced separately.
1509 * A third pool does submit_bio to avoid deadlocking with the other
1512 struct btrfs_workers generic_worker;
1513 struct btrfs_workers workers;
1514 struct btrfs_workers delalloc_workers;
1515 struct btrfs_workers flush_workers;
1516 struct btrfs_workers endio_workers;
1517 struct btrfs_workers endio_meta_workers;
1518 struct btrfs_workers endio_raid56_workers;
1519 struct btrfs_workers rmw_workers;
1520 struct btrfs_workers endio_meta_write_workers;
1521 struct btrfs_workers endio_write_workers;
1522 struct btrfs_workers endio_freespace_worker;
1523 struct btrfs_workers submit_workers;
1524 struct btrfs_workers caching_workers;
1525 struct btrfs_workers readahead_workers;
1528 * fixup workers take dirty pages that didn't properly go through
1529 * the cow mechanism and make them safe to write. It happens
1530 * for the sys_munmap function call path
1532 struct btrfs_workers fixup_workers;
1533 struct btrfs_workers delayed_workers;
1534 struct task_struct *transaction_kthread;
1535 struct task_struct *cleaner_kthread;
1536 int thread_pool_size;
1538 struct kobject super_kobj;
1539 struct kobject *space_info_kobj;
1540 struct kobject *device_dir_kobj;
1541 struct completion kobj_unregister;
1544 int log_root_recovering;
1548 /* used to keep from writing metadata until there is a nice batch */
1549 struct percpu_counter dirty_metadata_bytes;
1550 struct percpu_counter delalloc_bytes;
1551 s32 dirty_metadata_batch;
1554 struct list_head dirty_cowonly_roots;
1556 struct btrfs_fs_devices *fs_devices;
1559 * the space_info list is almost entirely read only. It only changes
1560 * when we add a new raid type to the FS, and that happens
1561 * very rarely. RCU is used to protect it.
1563 struct list_head space_info;
1565 struct btrfs_space_info *data_sinfo;
1567 struct reloc_control *reloc_ctl;
1569 /* data_alloc_cluster is only used in ssd mode */
1570 struct btrfs_free_cluster data_alloc_cluster;
1572 /* all metadata allocations go through this cluster */
1573 struct btrfs_free_cluster meta_alloc_cluster;
1575 /* auto defrag inodes go here */
1576 spinlock_t defrag_inodes_lock;
1577 struct rb_root defrag_inodes;
1578 atomic_t defrag_running;
1580 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1581 seqlock_t profiles_lock;
1583 * these three are in extended format (availability of single
1584 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1585 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1587 u64 avail_data_alloc_bits;
1588 u64 avail_metadata_alloc_bits;
1589 u64 avail_system_alloc_bits;
1591 /* restriper state */
1592 spinlock_t balance_lock;
1593 struct mutex balance_mutex;
1594 atomic_t balance_running;
1595 atomic_t balance_pause_req;
1596 atomic_t balance_cancel_req;
1597 struct btrfs_balance_control *balance_ctl;
1598 wait_queue_head_t balance_wait_q;
1600 unsigned data_chunk_allocations;
1601 unsigned metadata_ratio;
1605 /* private scrub information */
1606 struct mutex scrub_lock;
1607 atomic_t scrubs_running;
1608 atomic_t scrub_pause_req;
1609 atomic_t scrubs_paused;
1610 atomic_t scrub_cancel_req;
1611 wait_queue_head_t scrub_pause_wait;
1612 int scrub_workers_refcnt;
1613 struct btrfs_workers scrub_workers;
1614 struct btrfs_workers scrub_wr_completion_workers;
1615 struct btrfs_workers scrub_nocow_workers;
1617 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1618 u32 check_integrity_print_mask;
1623 unsigned int quota_enabled:1;
1626 * quota_enabled only changes state after a commit. This holds the
1629 unsigned int pending_quota_state:1;
1631 /* is qgroup tracking in a consistent state? */
1634 /* holds configuration and tracking. Protected by qgroup_lock */
1635 struct rb_root qgroup_tree;
1636 spinlock_t qgroup_lock;
1639 * used to avoid frequently calling ulist_alloc()/ulist_free()
1640 * when doing qgroup accounting, it must be protected by qgroup_lock.
1642 struct ulist *qgroup_ulist;
1644 /* protect user change for quota operations */
1645 struct mutex qgroup_ioctl_lock;
1647 /* list of dirty qgroups to be written at next commit */
1648 struct list_head dirty_qgroups;
1650 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1653 /* qgroup rescan items */
1654 struct mutex qgroup_rescan_lock; /* protects the progress item */
1655 struct btrfs_key qgroup_rescan_progress;
1656 struct btrfs_workers qgroup_rescan_workers;
1657 struct completion qgroup_rescan_completion;
1658 struct btrfs_work qgroup_rescan_work;
1660 /* filesystem state */
1661 unsigned long fs_state;
1663 struct btrfs_delayed_root *delayed_root;
1665 /* readahead tree */
1666 spinlock_t reada_lock;
1667 struct radix_tree_root reada_tree;
1669 /* Extent buffer radix tree */
1670 spinlock_t buffer_lock;
1671 struct radix_tree_root buffer_radix;
1673 /* next backup root to be overwritten */
1674 int backup_root_index;
1676 int num_tolerated_disk_barrier_failures;
1678 /* device replace state */
1679 struct btrfs_dev_replace dev_replace;
1681 atomic_t mutually_exclusive_operation_running;
1683 struct semaphore uuid_tree_rescan_sem;
1684 unsigned int update_uuid_tree_gen:1;
1688 * in ram representation of the tree. extent_root is used for all allocations
1689 * and for the extent tree extent_root root.
1692 struct extent_buffer *node;
1694 struct extent_buffer *commit_root;
1695 struct btrfs_root *log_root;
1696 struct btrfs_root *reloc_root;
1698 struct btrfs_root_item root_item;
1699 struct btrfs_key root_key;
1700 struct btrfs_fs_info *fs_info;
1701 struct extent_io_tree dirty_log_pages;
1703 struct kobject root_kobj;
1704 struct completion kobj_unregister;
1705 struct mutex objectid_mutex;
1707 spinlock_t accounting_lock;
1708 struct btrfs_block_rsv *block_rsv;
1710 /* free ino cache stuff */
1711 struct mutex fs_commit_mutex;
1712 struct btrfs_free_space_ctl *free_ino_ctl;
1713 enum btrfs_caching_type cached;
1714 spinlock_t cache_lock;
1715 wait_queue_head_t cache_wait;
1716 struct btrfs_free_space_ctl *free_ino_pinned;
1718 struct inode *cache_inode;
1720 struct mutex log_mutex;
1721 wait_queue_head_t log_writer_wait;
1722 wait_queue_head_t log_commit_wait[2];
1723 atomic_t log_writers;
1724 atomic_t log_commit[2];
1726 unsigned long log_transid;
1727 unsigned long last_log_commit;
1728 pid_t log_start_pid;
1729 bool log_multiple_pids;
1734 /* data allocations are done in sectorsize units */
1737 /* node allocations are done in nodesize units */
1740 /* leaf allocations are done in leafsize units */
1747 u64 highest_objectid;
1749 /* btrfs_record_root_in_trans is a multi-step process,
1750 * and it can race with the balancing code. But the
1751 * race is very small, and only the first time the root
1752 * is added to each transaction. So in_trans_setup
1753 * is used to tell us when more checks are required
1755 unsigned long in_trans_setup;
1759 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1762 u64 defrag_trans_start;
1763 struct btrfs_key defrag_progress;
1764 struct btrfs_key defrag_max;
1768 /* the dirty list is only used by non-reference counted roots */
1769 struct list_head dirty_list;
1771 struct list_head root_list;
1773 spinlock_t log_extents_lock[2];
1774 struct list_head logged_list[2];
1776 spinlock_t orphan_lock;
1777 atomic_t orphan_inodes;
1778 struct btrfs_block_rsv *orphan_block_rsv;
1779 int orphan_item_inserted;
1780 int orphan_cleanup_state;
1782 spinlock_t inode_lock;
1783 /* red-black tree that keeps track of in-memory inodes */
1784 struct rb_root inode_tree;
1787 * radix tree that keeps track of delayed nodes of every inode,
1788 * protected by inode_lock
1790 struct radix_tree_root delayed_nodes_tree;
1792 * right now this just gets used so that a root has its own devid
1793 * for stat. It may be used for more later
1799 spinlock_t root_item_lock;
1802 spinlock_t delalloc_lock;
1804 * all of the inodes that have delalloc bytes. It is possible for
1805 * this list to be empty even when there is still dirty data=ordered
1806 * extents waiting to finish IO.
1808 struct list_head delalloc_inodes;
1809 struct list_head delalloc_root;
1810 u64 nr_delalloc_inodes;
1812 * this is used by the balancing code to wait for all the pending
1815 spinlock_t ordered_extent_lock;
1818 * all of the data=ordered extents pending writeback
1819 * these can span multiple transactions and basically include
1820 * every dirty data page that isn't from nodatacow
1822 struct list_head ordered_extents;
1823 struct list_head ordered_root;
1824 u64 nr_ordered_extents;
1827 * Number of currently running SEND ioctls to prevent
1828 * manipulation with the read-only status via SUBVOL_SETFLAGS
1830 int send_in_progress;
1833 struct btrfs_ioctl_defrag_range_args {
1834 /* start of the defrag operation */
1837 /* number of bytes to defrag, use (u64)-1 to say all */
1841 * flags for the operation, which can include turning
1842 * on compression for this one defrag
1847 * any extent bigger than this will be considered
1848 * already defragged. Use 0 to take the kernel default
1849 * Use 1 to say every single extent must be rewritten
1851 __u32 extent_thresh;
1854 * which compression method to use if turning on compression
1855 * for this defrag operation. If unspecified, zlib will
1858 __u32 compress_type;
1860 /* spare for later */
1866 * inode items have the data typically returned from stat and store other
1867 * info about object characteristics. There is one for every file and dir in
1870 #define BTRFS_INODE_ITEM_KEY 1
1871 #define BTRFS_INODE_REF_KEY 12
1872 #define BTRFS_INODE_EXTREF_KEY 13
1873 #define BTRFS_XATTR_ITEM_KEY 24
1874 #define BTRFS_ORPHAN_ITEM_KEY 48
1875 /* reserve 2-15 close to the inode for later flexibility */
1878 * dir items are the name -> inode pointers in a directory. There is one
1879 * for every name in a directory.
1881 #define BTRFS_DIR_LOG_ITEM_KEY 60
1882 #define BTRFS_DIR_LOG_INDEX_KEY 72
1883 #define BTRFS_DIR_ITEM_KEY 84
1884 #define BTRFS_DIR_INDEX_KEY 96
1886 * extent data is for file data
1888 #define BTRFS_EXTENT_DATA_KEY 108
1891 * extent csums are stored in a separate tree and hold csums for
1892 * an entire extent on disk.
1894 #define BTRFS_EXTENT_CSUM_KEY 128
1897 * root items point to tree roots. They are typically in the root
1898 * tree used by the super block to find all the other trees
1900 #define BTRFS_ROOT_ITEM_KEY 132
1903 * root backrefs tie subvols and snapshots to the directory entries that
1906 #define BTRFS_ROOT_BACKREF_KEY 144
1909 * root refs make a fast index for listing all of the snapshots and
1910 * subvolumes referenced by a given root. They point directly to the
1911 * directory item in the root that references the subvol
1913 #define BTRFS_ROOT_REF_KEY 156
1916 * extent items are in the extent map tree. These record which blocks
1917 * are used, and how many references there are to each block
1919 #define BTRFS_EXTENT_ITEM_KEY 168
1922 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1923 * the length, so we save the level in key->offset instead of the length.
1925 #define BTRFS_METADATA_ITEM_KEY 169
1927 #define BTRFS_TREE_BLOCK_REF_KEY 176
1929 #define BTRFS_EXTENT_DATA_REF_KEY 178
1931 #define BTRFS_EXTENT_REF_V0_KEY 180
1933 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1935 #define BTRFS_SHARED_DATA_REF_KEY 184
1938 * block groups give us hints into the extent allocation trees. Which
1939 * blocks are free etc etc
1941 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1943 #define BTRFS_DEV_EXTENT_KEY 204
1944 #define BTRFS_DEV_ITEM_KEY 216
1945 #define BTRFS_CHUNK_ITEM_KEY 228
1948 * Records the overall state of the qgroups.
1949 * There's only one instance of this key present,
1950 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1952 #define BTRFS_QGROUP_STATUS_KEY 240
1954 * Records the currently used space of the qgroup.
1955 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1957 #define BTRFS_QGROUP_INFO_KEY 242
1959 * Contains the user configured limits for the qgroup.
1960 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1962 #define BTRFS_QGROUP_LIMIT_KEY 244
1964 * Records the child-parent relationship of qgroups. For
1965 * each relation, 2 keys are present:
1966 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1967 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1969 #define BTRFS_QGROUP_RELATION_KEY 246
1971 #define BTRFS_BALANCE_ITEM_KEY 248
1974 * Persistantly stores the io stats in the device tree.
1975 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1977 #define BTRFS_DEV_STATS_KEY 249
1980 * Persistantly stores the device replace state in the device tree.
1981 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1983 #define BTRFS_DEV_REPLACE_KEY 250
1986 * Stores items that allow to quickly map UUIDs to something else.
1987 * These items are part of the filesystem UUID tree.
1988 * The key is built like this:
1989 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1991 #if BTRFS_UUID_SIZE != 16
1992 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1994 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1995 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1996 * received subvols */
1999 * string items are for debugging. They just store a short string of
2002 #define BTRFS_STRING_ITEM_KEY 253
2005 * Flags for mount options.
2007 * Note: don't forget to add new options to btrfs_show_options()
2009 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2010 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2011 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2012 #define BTRFS_MOUNT_SSD (1 << 3)
2013 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2014 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2015 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2016 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2017 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2018 #define BTRFS_MOUNT_NOSSD (1 << 9)
2019 #define BTRFS_MOUNT_DISCARD (1 << 10)
2020 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2021 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2022 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2023 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2024 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2025 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2026 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2027 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2028 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2029 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2030 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2031 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2032 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2033 #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2035 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2037 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2038 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2039 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2040 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2045 #define BTRFS_INODE_NODATASUM (1 << 0)
2046 #define BTRFS_INODE_NODATACOW (1 << 1)
2047 #define BTRFS_INODE_READONLY (1 << 2)
2048 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2049 #define BTRFS_INODE_PREALLOC (1 << 4)
2050 #define BTRFS_INODE_SYNC (1 << 5)
2051 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2052 #define BTRFS_INODE_APPEND (1 << 7)
2053 #define BTRFS_INODE_NODUMP (1 << 8)
2054 #define BTRFS_INODE_NOATIME (1 << 9)
2055 #define BTRFS_INODE_DIRSYNC (1 << 10)
2056 #define BTRFS_INODE_COMPRESS (1 << 11)
2058 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2060 struct btrfs_map_token {
2061 struct extent_buffer *eb;
2063 unsigned long offset;
2066 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2068 token->kaddr = NULL;
2071 /* some macros to generate set/get funcs for the struct fields. This
2072 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2075 #define le8_to_cpu(v) (v)
2076 #define cpu_to_le8(v) (v)
2079 #define read_eb_member(eb, ptr, type, member, result) ( \
2080 read_extent_buffer(eb, (char *)(result), \
2081 ((unsigned long)(ptr)) + \
2082 offsetof(type, member), \
2083 sizeof(((type *)0)->member)))
2085 #define write_eb_member(eb, ptr, type, member, result) ( \
2086 write_extent_buffer(eb, (char *)(result), \
2087 ((unsigned long)(ptr)) + \
2088 offsetof(type, member), \
2089 sizeof(((type *)0)->member)))
2091 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2092 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2093 unsigned long off, \
2094 struct btrfs_map_token *token); \
2095 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2096 unsigned long off, u##bits val, \
2097 struct btrfs_map_token *token); \
2098 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2099 unsigned long off) \
2101 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2103 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2104 unsigned long off, u##bits val) \
2106 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2109 DECLARE_BTRFS_SETGET_BITS(8)
2110 DECLARE_BTRFS_SETGET_BITS(16)
2111 DECLARE_BTRFS_SETGET_BITS(32)
2112 DECLARE_BTRFS_SETGET_BITS(64)
2114 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2115 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2117 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2118 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2120 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2123 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2124 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2126 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2127 struct btrfs_map_token *token) \
2129 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2130 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2132 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2133 type *s, u##bits val, \
2134 struct btrfs_map_token *token) \
2136 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2137 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2140 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2141 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2143 type *p = page_address(eb->pages[0]); \
2144 u##bits res = le##bits##_to_cpu(p->member); \
2147 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2150 type *p = page_address(eb->pages[0]); \
2151 p->member = cpu_to_le##bits(val); \
2154 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2155 static inline u##bits btrfs_##name(type *s) \
2157 return le##bits##_to_cpu(s->member); \
2159 static inline void btrfs_set_##name(type *s, u##bits val) \
2161 s->member = cpu_to_le##bits(val); \
2164 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2165 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2166 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2167 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2168 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2169 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2171 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2172 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2173 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2174 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2175 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2176 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2178 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2179 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2181 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2183 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2185 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2187 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2189 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2190 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2192 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2194 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2196 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2199 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2201 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2204 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2206 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2209 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2210 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2211 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2212 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2213 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2214 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2215 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2216 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2217 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2218 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2219 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2221 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2223 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2226 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2227 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2228 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2230 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2232 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2234 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2236 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2237 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2239 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2241 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2242 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2244 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2247 unsigned long offset = (unsigned long)c;
2248 offset += offsetof(struct btrfs_chunk, stripe);
2249 offset += nr * sizeof(struct btrfs_stripe);
2250 return (struct btrfs_stripe *)offset;
2253 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2255 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2258 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2259 struct btrfs_chunk *c, int nr)
2261 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2264 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2265 struct btrfs_chunk *c, int nr)
2267 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2270 /* struct btrfs_block_group_item */
2271 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2273 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2275 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2276 struct btrfs_block_group_item, chunk_objectid, 64);
2278 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2279 struct btrfs_block_group_item, chunk_objectid, 64);
2280 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2281 struct btrfs_block_group_item, flags, 64);
2282 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2283 struct btrfs_block_group_item, flags, 64);
2285 /* struct btrfs_inode_ref */
2286 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2287 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2289 /* struct btrfs_inode_extref */
2290 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2291 parent_objectid, 64);
2292 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2294 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2296 /* struct btrfs_inode_item */
2297 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2298 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2299 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2300 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2301 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2302 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2303 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2304 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2305 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2306 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2307 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2308 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2309 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2311 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2313 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2315 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2316 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2318 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2320 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2321 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2322 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2323 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2324 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2325 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2327 static inline struct btrfs_timespec *
2328 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2330 unsigned long ptr = (unsigned long)inode_item;
2331 ptr += offsetof(struct btrfs_inode_item, atime);
2332 return (struct btrfs_timespec *)ptr;
2335 static inline struct btrfs_timespec *
2336 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2338 unsigned long ptr = (unsigned long)inode_item;
2339 ptr += offsetof(struct btrfs_inode_item, mtime);
2340 return (struct btrfs_timespec *)ptr;
2343 static inline struct btrfs_timespec *
2344 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2346 unsigned long ptr = (unsigned long)inode_item;
2347 ptr += offsetof(struct btrfs_inode_item, ctime);
2348 return (struct btrfs_timespec *)ptr;
2351 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2352 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2353 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2354 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2356 /* struct btrfs_dev_extent */
2357 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2359 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2360 chunk_objectid, 64);
2361 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2363 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2365 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2367 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2368 return (unsigned long)dev + ptr;
2371 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2372 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2374 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2376 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2379 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2381 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2382 struct btrfs_tree_block_info *item,
2383 struct btrfs_disk_key *key)
2385 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2388 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2389 struct btrfs_tree_block_info *item,
2390 struct btrfs_disk_key *key)
2392 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2395 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2397 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2399 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2401 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2404 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2407 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2409 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2412 static inline u32 btrfs_extent_inline_ref_size(int type)
2414 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2415 type == BTRFS_SHARED_BLOCK_REF_KEY)
2416 return sizeof(struct btrfs_extent_inline_ref);
2417 if (type == BTRFS_SHARED_DATA_REF_KEY)
2418 return sizeof(struct btrfs_shared_data_ref) +
2419 sizeof(struct btrfs_extent_inline_ref);
2420 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2421 return sizeof(struct btrfs_extent_data_ref) +
2422 offsetof(struct btrfs_extent_inline_ref, offset);
2427 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2428 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2430 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2431 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2433 /* struct btrfs_node */
2434 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2435 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2436 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2438 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2441 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2444 ptr = offsetof(struct btrfs_node, ptrs) +
2445 sizeof(struct btrfs_key_ptr) * nr;
2446 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2449 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2453 ptr = offsetof(struct btrfs_node, ptrs) +
2454 sizeof(struct btrfs_key_ptr) * nr;
2455 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2458 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2461 ptr = offsetof(struct btrfs_node, ptrs) +
2462 sizeof(struct btrfs_key_ptr) * nr;
2463 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2466 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2470 ptr = offsetof(struct btrfs_node, ptrs) +
2471 sizeof(struct btrfs_key_ptr) * nr;
2472 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2475 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2477 return offsetof(struct btrfs_node, ptrs) +
2478 sizeof(struct btrfs_key_ptr) * nr;
2481 void btrfs_node_key(struct extent_buffer *eb,
2482 struct btrfs_disk_key *disk_key, int nr);
2484 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2485 struct btrfs_disk_key *disk_key, int nr)
2488 ptr = btrfs_node_key_ptr_offset(nr);
2489 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2490 struct btrfs_key_ptr, key, disk_key);
2493 /* struct btrfs_item */
2494 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2495 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2496 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2497 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2499 static inline unsigned long btrfs_item_nr_offset(int nr)
2501 return offsetof(struct btrfs_leaf, items) +
2502 sizeof(struct btrfs_item) * nr;
2505 static inline struct btrfs_item *btrfs_item_nr(int nr)
2507 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2510 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2511 struct btrfs_item *item)
2513 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2516 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2518 return btrfs_item_end(eb, btrfs_item_nr(nr));
2521 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2523 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2526 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2528 return btrfs_item_size(eb, btrfs_item_nr(nr));
2531 static inline void btrfs_item_key(struct extent_buffer *eb,
2532 struct btrfs_disk_key *disk_key, int nr)
2534 struct btrfs_item *item = btrfs_item_nr(nr);
2535 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2538 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2539 struct btrfs_disk_key *disk_key, int nr)
2541 struct btrfs_item *item = btrfs_item_nr(nr);
2542 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2545 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2548 * struct btrfs_root_ref
2550 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2551 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2552 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2554 /* struct btrfs_dir_item */
2555 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2556 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2557 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2558 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2559 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2560 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2562 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2564 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2567 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2568 struct btrfs_dir_item *item,
2569 struct btrfs_disk_key *key)
2571 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2574 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2575 struct btrfs_dir_item *item,
2576 struct btrfs_disk_key *key)
2578 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2581 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2583 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2585 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2588 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2589 struct btrfs_free_space_header *h,
2590 struct btrfs_disk_key *key)
2592 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2595 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2596 struct btrfs_free_space_header *h,
2597 struct btrfs_disk_key *key)
2599 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2602 /* struct btrfs_disk_key */
2603 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2605 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2606 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2608 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2609 struct btrfs_disk_key *disk)
2611 cpu->offset = le64_to_cpu(disk->offset);
2612 cpu->type = disk->type;
2613 cpu->objectid = le64_to_cpu(disk->objectid);
2616 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2617 struct btrfs_key *cpu)
2619 disk->offset = cpu_to_le64(cpu->offset);
2620 disk->type = cpu->type;
2621 disk->objectid = cpu_to_le64(cpu->objectid);
2624 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2625 struct btrfs_key *key, int nr)
2627 struct btrfs_disk_key disk_key;
2628 btrfs_node_key(eb, &disk_key, nr);
2629 btrfs_disk_key_to_cpu(key, &disk_key);
2632 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2633 struct btrfs_key *key, int nr)
2635 struct btrfs_disk_key disk_key;
2636 btrfs_item_key(eb, &disk_key, nr);
2637 btrfs_disk_key_to_cpu(key, &disk_key);
2640 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2641 struct btrfs_dir_item *item,
2642 struct btrfs_key *key)
2644 struct btrfs_disk_key disk_key;
2645 btrfs_dir_item_key(eb, item, &disk_key);
2646 btrfs_disk_key_to_cpu(key, &disk_key);
2650 static inline u8 btrfs_key_type(struct btrfs_key *key)
2655 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2660 /* struct btrfs_header */
2661 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2662 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2664 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2665 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2666 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2667 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2668 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2670 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2671 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2673 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2675 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2677 return (btrfs_header_flags(eb) & flag) == flag;
2680 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2682 u64 flags = btrfs_header_flags(eb);
2683 btrfs_set_header_flags(eb, flags | flag);
2684 return (flags & flag) == flag;
2687 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2689 u64 flags = btrfs_header_flags(eb);
2690 btrfs_set_header_flags(eb, flags & ~flag);
2691 return (flags & flag) == flag;
2694 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2696 u64 flags = btrfs_header_flags(eb);
2697 return flags >> BTRFS_BACKREF_REV_SHIFT;
2700 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2703 u64 flags = btrfs_header_flags(eb);
2704 flags &= ~BTRFS_BACKREF_REV_MASK;
2705 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2706 btrfs_set_header_flags(eb, flags);
2709 static inline unsigned long btrfs_header_fsid(void)
2711 return offsetof(struct btrfs_header, fsid);
2714 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2716 return offsetof(struct btrfs_header, chunk_tree_uuid);
2719 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2721 return btrfs_header_level(eb) == 0;
2724 /* struct btrfs_root_item */
2725 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2727 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2728 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2729 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2731 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2733 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2734 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2735 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2736 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2737 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2738 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2739 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2740 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2742 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2744 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2746 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2748 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2750 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2753 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2755 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2758 /* struct btrfs_root_backup */
2759 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2761 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2763 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2764 tree_root_level, 8);
2766 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2768 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2769 chunk_root_gen, 64);
2770 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2771 chunk_root_level, 8);
2773 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2775 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2776 extent_root_gen, 64);
2777 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2778 extent_root_level, 8);
2780 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2782 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2784 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2787 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2789 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2791 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2794 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2796 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2798 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2799 csum_root_level, 8);
2800 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2802 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2804 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2807 /* struct btrfs_balance_item */
2808 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2810 static inline void btrfs_balance_data(struct extent_buffer *eb,
2811 struct btrfs_balance_item *bi,
2812 struct btrfs_disk_balance_args *ba)
2814 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2817 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2818 struct btrfs_balance_item *bi,
2819 struct btrfs_disk_balance_args *ba)
2821 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2824 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2825 struct btrfs_balance_item *bi,
2826 struct btrfs_disk_balance_args *ba)
2828 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2831 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2832 struct btrfs_balance_item *bi,
2833 struct btrfs_disk_balance_args *ba)
2835 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2838 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2839 struct btrfs_balance_item *bi,
2840 struct btrfs_disk_balance_args *ba)
2842 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2845 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2846 struct btrfs_balance_item *bi,
2847 struct btrfs_disk_balance_args *ba)
2849 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2853 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2854 struct btrfs_disk_balance_args *disk)
2856 memset(cpu, 0, sizeof(*cpu));
2858 cpu->profiles = le64_to_cpu(disk->profiles);
2859 cpu->usage = le64_to_cpu(disk->usage);
2860 cpu->devid = le64_to_cpu(disk->devid);
2861 cpu->pstart = le64_to_cpu(disk->pstart);
2862 cpu->pend = le64_to_cpu(disk->pend);
2863 cpu->vstart = le64_to_cpu(disk->vstart);
2864 cpu->vend = le64_to_cpu(disk->vend);
2865 cpu->target = le64_to_cpu(disk->target);
2866 cpu->flags = le64_to_cpu(disk->flags);
2870 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2871 struct btrfs_balance_args *cpu)
2873 memset(disk, 0, sizeof(*disk));
2875 disk->profiles = cpu_to_le64(cpu->profiles);
2876 disk->usage = cpu_to_le64(cpu->usage);
2877 disk->devid = cpu_to_le64(cpu->devid);
2878 disk->pstart = cpu_to_le64(cpu->pstart);
2879 disk->pend = cpu_to_le64(cpu->pend);
2880 disk->vstart = cpu_to_le64(cpu->vstart);
2881 disk->vend = cpu_to_le64(cpu->vend);
2882 disk->target = cpu_to_le64(cpu->target);
2883 disk->flags = cpu_to_le64(cpu->flags);
2886 /* struct btrfs_super_block */
2887 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2888 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2889 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2891 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2892 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2893 struct btrfs_super_block, sys_chunk_array_size, 32);
2894 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2895 struct btrfs_super_block, chunk_root_generation, 64);
2896 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2898 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2900 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2901 chunk_root_level, 8);
2902 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2904 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2905 log_root_transid, 64);
2906 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2908 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2910 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2912 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2914 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2916 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2918 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2920 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2921 root_dir_objectid, 64);
2922 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2924 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2926 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2927 compat_ro_flags, 64);
2928 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2929 incompat_flags, 64);
2930 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2932 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2933 cache_generation, 64);
2934 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2935 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2936 uuid_tree_generation, 64);
2938 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2940 u16 t = btrfs_super_csum_type(s);
2942 * csum type is validated at mount time
2944 return btrfs_csum_sizes[t];
2947 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2949 return offsetof(struct btrfs_leaf, items);
2952 /* struct btrfs_file_extent_item */
2953 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2954 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2955 struct btrfs_file_extent_item, disk_bytenr, 64);
2956 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2957 struct btrfs_file_extent_item, offset, 64);
2958 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2959 struct btrfs_file_extent_item, generation, 64);
2960 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2961 struct btrfs_file_extent_item, num_bytes, 64);
2962 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2963 struct btrfs_file_extent_item, disk_num_bytes, 64);
2964 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2965 struct btrfs_file_extent_item, compression, 8);
2967 static inline unsigned long
2968 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2970 unsigned long offset = (unsigned long)e;
2971 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2975 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2977 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2980 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2982 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2984 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2985 disk_num_bytes, 64);
2986 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2988 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2990 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2992 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2994 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2996 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2997 other_encoding, 16);
3000 * this returns the number of bytes used by the item on disk, minus the
3001 * size of any extent headers. If a file is compressed on disk, this is
3002 * the compressed size
3004 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3005 struct btrfs_item *e)
3007 unsigned long offset;
3008 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
3009 return btrfs_item_size(eb, e) - offset;
3012 /* this returns the number of file bytes represented by the inline item.
3013 * If an item is compressed, this is the uncompressed size
3015 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3017 struct btrfs_file_extent_item *fi)
3019 struct btrfs_map_token token;
3021 btrfs_init_map_token(&token);
3023 * return the space used on disk if this item isn't
3024 * compressed or encoded
3026 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3027 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3028 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3029 return btrfs_file_extent_inline_item_len(eb,
3030 btrfs_item_nr(slot));
3033 /* otherwise use the ram bytes field */
3034 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3038 /* btrfs_dev_stats_item */
3039 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3040 struct btrfs_dev_stats_item *ptr,
3045 read_extent_buffer(eb, &val,
3046 offsetof(struct btrfs_dev_stats_item, values) +
3047 ((unsigned long)ptr) + (index * sizeof(u64)),
3052 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3053 struct btrfs_dev_stats_item *ptr,
3056 write_extent_buffer(eb, &val,
3057 offsetof(struct btrfs_dev_stats_item, values) +
3058 ((unsigned long)ptr) + (index * sizeof(u64)),
3062 /* btrfs_qgroup_status_item */
3063 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3065 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3067 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3069 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3072 /* btrfs_qgroup_info_item */
3073 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3075 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3076 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3078 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3079 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3082 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3083 struct btrfs_qgroup_info_item, generation, 64);
3084 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3086 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3087 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3088 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3090 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3091 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3093 /* btrfs_qgroup_limit_item */
3094 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3096 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3098 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3100 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3102 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3105 /* btrfs_dev_replace_item */
3106 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3107 struct btrfs_dev_replace_item, src_devid, 64);
3108 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3109 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3111 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3113 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3115 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3117 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3118 num_write_errors, 64);
3119 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3120 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3122 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3124 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3127 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3128 struct btrfs_dev_replace_item, src_devid, 64);
3129 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3130 struct btrfs_dev_replace_item,
3131 cont_reading_from_srcdev_mode, 64);
3132 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3133 struct btrfs_dev_replace_item, replace_state, 64);
3134 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3135 struct btrfs_dev_replace_item, time_started, 64);
3136 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3137 struct btrfs_dev_replace_item, time_stopped, 64);
3138 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3139 struct btrfs_dev_replace_item, num_write_errors, 64);
3140 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3141 struct btrfs_dev_replace_item,
3142 num_uncorrectable_read_errors, 64);
3143 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3144 struct btrfs_dev_replace_item, cursor_left, 64);
3145 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3146 struct btrfs_dev_replace_item, cursor_right, 64);
3148 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3150 return sb->s_fs_info;
3153 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
3156 return root->leafsize;
3157 return root->nodesize;
3160 /* helper function to cast into the data area of the leaf. */
3161 #define btrfs_item_ptr(leaf, slot, type) \
3162 ((type *)(btrfs_leaf_data(leaf) + \
3163 btrfs_item_offset_nr(leaf, slot)))
3165 #define btrfs_item_ptr_offset(leaf, slot) \
3166 ((unsigned long)(btrfs_leaf_data(leaf) + \
3167 btrfs_item_offset_nr(leaf, slot)))
3169 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3171 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3172 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3175 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3177 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3181 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3184 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3189 * Doing a truncate won't result in new nodes or leaves, just what we need for
3192 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3195 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3199 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3200 struct btrfs_root *root);
3201 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root);
3203 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3204 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3205 struct btrfs_root *root, unsigned long count);
3206 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3207 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3208 struct btrfs_root *root, u64 bytenr,
3209 u64 offset, int metadata, u64 *refs, u64 *flags);
3210 int btrfs_pin_extent(struct btrfs_root *root,
3211 u64 bytenr, u64 num, int reserved);
3212 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3213 u64 bytenr, u64 num_bytes);
3214 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3215 struct extent_buffer *eb);
3216 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3217 struct btrfs_root *root,
3218 u64 objectid, u64 offset, u64 bytenr);
3219 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3220 struct btrfs_fs_info *info,
3222 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3223 int get_block_group_index(struct btrfs_block_group_cache *cache);
3224 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3225 struct btrfs_root *root, u32 blocksize,
3226 u64 parent, u64 root_objectid,
3227 struct btrfs_disk_key *key, int level,
3228 u64 hint, u64 empty_size);
3229 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3230 struct btrfs_root *root,
3231 struct extent_buffer *buf,
3232 u64 parent, int last_ref);
3233 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3234 struct btrfs_root *root,
3235 u64 root_objectid, u64 owner,
3236 u64 offset, struct btrfs_key *ins);
3237 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3238 struct btrfs_root *root,
3239 u64 root_objectid, u64 owner, u64 offset,
3240 struct btrfs_key *ins);
3241 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3242 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3243 struct btrfs_key *ins, int is_data);
3244 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3245 struct extent_buffer *buf, int full_backref, int for_cow);
3246 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3247 struct extent_buffer *buf, int full_backref, int for_cow);
3248 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3249 struct btrfs_root *root,
3250 u64 bytenr, u64 num_bytes, u64 flags,
3251 int level, int is_data);
3252 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3253 struct btrfs_root *root,
3254 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3255 u64 owner, u64 offset, int for_cow);
3257 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3258 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3259 u64 start, u64 len);
3260 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3261 struct btrfs_root *root);
3262 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3263 struct btrfs_root *root);
3264 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3265 struct btrfs_root *root,
3266 u64 bytenr, u64 num_bytes, u64 parent,
3267 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3269 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3270 struct btrfs_root *root);
3271 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3272 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3273 int btrfs_read_block_groups(struct btrfs_root *root);
3274 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3275 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3276 struct btrfs_root *root, u64 bytes_used,
3277 u64 type, u64 chunk_objectid, u64 chunk_offset,
3279 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3280 struct btrfs_root *root, u64 group_start);
3281 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3282 struct btrfs_root *root);
3283 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3284 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3286 enum btrfs_reserve_flush_enum {
3287 /* If we are in the transaction, we can't flush anything.*/
3288 BTRFS_RESERVE_NO_FLUSH,
3290 * Flushing delalloc may cause deadlock somewhere, in this
3291 * case, use FLUSH LIMIT
3293 BTRFS_RESERVE_FLUSH_LIMIT,
3294 BTRFS_RESERVE_FLUSH_ALL,
3297 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3298 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3299 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3300 struct btrfs_root *root);
3301 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3302 struct inode *inode);
3303 void btrfs_orphan_release_metadata(struct inode *inode);
3304 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3305 struct btrfs_block_rsv *rsv,
3307 u64 *qgroup_reserved, bool use_global_rsv);
3308 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3309 struct btrfs_block_rsv *rsv,
3310 u64 qgroup_reserved);
3311 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3312 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3313 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3314 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3315 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3316 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3317 unsigned short type);
3318 void btrfs_free_block_rsv(struct btrfs_root *root,
3319 struct btrfs_block_rsv *rsv);
3320 int btrfs_block_rsv_add(struct btrfs_root *root,
3321 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3322 enum btrfs_reserve_flush_enum flush);
3323 int btrfs_block_rsv_check(struct btrfs_root *root,
3324 struct btrfs_block_rsv *block_rsv, int min_factor);
3325 int btrfs_block_rsv_refill(struct btrfs_root *root,
3326 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3327 enum btrfs_reserve_flush_enum flush);
3328 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3329 struct btrfs_block_rsv *dst_rsv,
3331 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3332 struct btrfs_block_rsv *dest, u64 num_bytes,
3334 void btrfs_block_rsv_release(struct btrfs_root *root,
3335 struct btrfs_block_rsv *block_rsv,
3337 int btrfs_set_block_group_ro(struct btrfs_root *root,
3338 struct btrfs_block_group_cache *cache);
3339 void btrfs_set_block_group_rw(struct btrfs_root *root,
3340 struct btrfs_block_group_cache *cache);
3341 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3342 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3343 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3344 u64 start, u64 end);
3345 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3346 u64 num_bytes, u64 *actual_bytes);
3347 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3348 struct btrfs_root *root, u64 type);
3349 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3351 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3352 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3353 struct btrfs_fs_info *fs_info);
3354 int __get_raid_index(u64 flags);
3356 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3357 int level, int *slot);
3358 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3359 int btrfs_previous_item(struct btrfs_root *root,
3360 struct btrfs_path *path, u64 min_objectid,
3362 int btrfs_previous_extent_item(struct btrfs_root *root,
3363 struct btrfs_path *path, u64 min_objectid);
3364 void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
3365 struct btrfs_key *new_key);
3366 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3367 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3368 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3369 struct btrfs_key *key, int lowest_level,
3371 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3372 struct btrfs_path *path,
3374 enum btrfs_compare_tree_result {
3375 BTRFS_COMPARE_TREE_NEW,
3376 BTRFS_COMPARE_TREE_DELETED,
3377 BTRFS_COMPARE_TREE_CHANGED,
3378 BTRFS_COMPARE_TREE_SAME,
3380 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3381 struct btrfs_root *right_root,
3382 struct btrfs_path *left_path,
3383 struct btrfs_path *right_path,
3384 struct btrfs_key *key,
3385 enum btrfs_compare_tree_result result,
3387 int btrfs_compare_trees(struct btrfs_root *left_root,
3388 struct btrfs_root *right_root,
3389 btrfs_changed_cb_t cb, void *ctx);
3390 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3391 struct btrfs_root *root, struct extent_buffer *buf,
3392 struct extent_buffer *parent, int parent_slot,
3393 struct extent_buffer **cow_ret);
3394 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3395 struct btrfs_root *root,
3396 struct extent_buffer *buf,
3397 struct extent_buffer **cow_ret, u64 new_root_objectid);
3398 int btrfs_block_can_be_shared(struct btrfs_root *root,
3399 struct extent_buffer *buf);
3400 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3402 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3403 u32 new_size, int from_end);
3404 int btrfs_split_item(struct btrfs_trans_handle *trans,
3405 struct btrfs_root *root,
3406 struct btrfs_path *path,
3407 struct btrfs_key *new_key,
3408 unsigned long split_offset);
3409 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3410 struct btrfs_root *root,
3411 struct btrfs_path *path,
3412 struct btrfs_key *new_key);
3413 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3414 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3415 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3416 *root, struct btrfs_key *key, struct btrfs_path *p, int
3418 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3419 struct btrfs_path *p, u64 time_seq);
3420 int btrfs_search_slot_for_read(struct btrfs_root *root,
3421 struct btrfs_key *key, struct btrfs_path *p,
3422 int find_higher, int return_any);
3423 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3424 struct btrfs_root *root, struct extent_buffer *parent,
3425 int start_slot, u64 *last_ret,
3426 struct btrfs_key *progress);
3427 void btrfs_release_path(struct btrfs_path *p);
3428 struct btrfs_path *btrfs_alloc_path(void);
3429 void btrfs_free_path(struct btrfs_path *p);
3430 void btrfs_set_path_blocking(struct btrfs_path *p);
3431 void btrfs_clear_path_blocking(struct btrfs_path *p,
3432 struct extent_buffer *held, int held_rw);
3433 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3435 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3436 struct btrfs_path *path, int slot, int nr);
3437 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3438 struct btrfs_root *root,
3439 struct btrfs_path *path)
3441 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3444 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3445 struct btrfs_key *cpu_key, u32 *data_size,
3446 u32 total_data, u32 total_size, int nr);
3447 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3448 *root, struct btrfs_key *key, void *data, u32 data_size);
3449 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3450 struct btrfs_root *root,
3451 struct btrfs_path *path,
3452 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3454 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3455 struct btrfs_root *root,
3456 struct btrfs_path *path,
3457 struct btrfs_key *key,
3460 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3463 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3464 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3465 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3467 static inline int btrfs_next_old_item(struct btrfs_root *root,
3468 struct btrfs_path *p, u64 time_seq)
3471 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3472 return btrfs_next_old_leaf(root, p, time_seq);
3475 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3477 return btrfs_next_old_item(root, p, 0);
3479 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3480 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3481 struct btrfs_block_rsv *block_rsv,
3482 int update_ref, int for_reloc);
3483 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3484 struct btrfs_root *root,
3485 struct extent_buffer *node,
3486 struct extent_buffer *parent);
3487 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3490 * Get synced with close_ctree()
3493 return fs_info->closing;
3497 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3498 * anything except sleeping. This function is used to check the status of
3501 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3503 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3504 btrfs_fs_closing(root->fs_info));
3507 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3509 kfree(fs_info->balance_ctl);
3510 kfree(fs_info->delayed_root);
3511 kfree(fs_info->extent_root);
3512 kfree(fs_info->tree_root);
3513 kfree(fs_info->chunk_root);
3514 kfree(fs_info->dev_root);
3515 kfree(fs_info->csum_root);
3516 kfree(fs_info->quota_root);
3517 kfree(fs_info->uuid_root);
3518 kfree(fs_info->super_copy);
3519 kfree(fs_info->super_for_commit);
3523 /* tree mod log functions from ctree.c */
3524 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3525 struct seq_list *elem);
3526 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3527 struct seq_list *elem);
3528 u64 btrfs_tree_mod_seq_prev(u64 seq);
3529 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3532 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3533 struct btrfs_path *path,
3534 u64 root_id, u64 ref_id);
3535 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3536 struct btrfs_root *tree_root,
3537 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3538 const char *name, int name_len);
3539 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3540 struct btrfs_root *tree_root,
3541 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3542 const char *name, int name_len);
3543 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3544 struct btrfs_key *key);
3545 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3546 *root, struct btrfs_key *key, struct btrfs_root_item
3548 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3549 struct btrfs_root *root,
3550 struct btrfs_key *key,
3551 struct btrfs_root_item *item);
3552 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3553 struct btrfs_path *path, struct btrfs_root_item *root_item,
3554 struct btrfs_key *root_key);
3555 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3556 void btrfs_set_root_node(struct btrfs_root_item *item,
3557 struct extent_buffer *node);
3558 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3559 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3560 struct btrfs_root *root);
3563 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3564 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3566 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3567 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3569 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3570 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3574 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3575 const char *name, int name_len);
3576 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3577 struct btrfs_root *root, const char *name,
3578 int name_len, struct inode *dir,
3579 struct btrfs_key *location, u8 type, u64 index);
3580 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3581 struct btrfs_root *root,
3582 struct btrfs_path *path, u64 dir,
3583 const char *name, int name_len,
3585 struct btrfs_dir_item *
3586 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3587 struct btrfs_root *root,
3588 struct btrfs_path *path, u64 dir,
3589 u64 objectid, const char *name, int name_len,
3591 struct btrfs_dir_item *
3592 btrfs_search_dir_index_item(struct btrfs_root *root,
3593 struct btrfs_path *path, u64 dirid,
3594 const char *name, int name_len);
3595 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3596 struct btrfs_root *root,
3597 struct btrfs_path *path,
3598 struct btrfs_dir_item *di);
3599 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3600 struct btrfs_root *root,
3601 struct btrfs_path *path, u64 objectid,
3602 const char *name, u16 name_len,
3603 const void *data, u16 data_len);
3604 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3605 struct btrfs_root *root,
3606 struct btrfs_path *path, u64 dir,
3607 const char *name, u16 name_len,
3609 int verify_dir_item(struct btrfs_root *root,
3610 struct extent_buffer *leaf,
3611 struct btrfs_dir_item *dir_item);
3614 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3615 struct btrfs_root *root, u64 offset);
3616 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3617 struct btrfs_root *root, u64 offset);
3618 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3621 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3622 struct btrfs_root *root,
3623 const char *name, int name_len,
3624 u64 inode_objectid, u64 ref_objectid, u64 index);
3625 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3626 struct btrfs_root *root,
3627 const char *name, int name_len,
3628 u64 inode_objectid, u64 ref_objectid, u64 *index);
3629 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3630 struct btrfs_root *root,
3631 struct btrfs_path *path, u64 objectid);
3632 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3633 *root, struct btrfs_path *path,
3634 struct btrfs_key *location, int mod);
3636 struct btrfs_inode_extref *
3637 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3638 struct btrfs_root *root,
3639 struct btrfs_path *path,
3640 const char *name, int name_len,
3641 u64 inode_objectid, u64 ref_objectid, int ins_len,
3644 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3645 u64 ref_objectid, const char *name,
3647 struct btrfs_inode_extref **extref_ret);
3650 struct btrfs_dio_private;
3651 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3652 struct btrfs_root *root, u64 bytenr, u64 len);
3653 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3654 struct bio *bio, u32 *dst);
3655 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3656 struct btrfs_dio_private *dip, struct bio *bio,
3657 u64 logical_offset);
3658 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3659 struct btrfs_root *root,
3660 u64 objectid, u64 pos,
3661 u64 disk_offset, u64 disk_num_bytes,
3662 u64 num_bytes, u64 offset, u64 ram_bytes,
3663 u8 compression, u8 encryption, u16 other_encoding);
3664 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3665 struct btrfs_root *root,
3666 struct btrfs_path *path, u64 objectid,
3667 u64 bytenr, int mod);
3668 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3669 struct btrfs_root *root,
3670 struct btrfs_ordered_sum *sums);
3671 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3672 struct bio *bio, u64 file_start, int contig);
3673 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3674 struct list_head *list, int search_commit);
3676 struct btrfs_delalloc_work {
3677 struct inode *inode;
3680 struct completion completion;
3681 struct list_head list;
3682 struct btrfs_work work;
3685 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3686 int wait, int delay_iput);
3687 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3689 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3690 size_t pg_offset, u64 start, u64 len,
3692 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3693 u64 *orig_start, u64 *orig_block_len,
3696 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3697 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3698 #define ClearPageChecked ClearPageFsMisc
3699 #define SetPageChecked SetPageFsMisc
3700 #define PageChecked PageFsMisc
3703 /* This forces readahead on a given range of bytes in an inode */
3704 static inline void btrfs_force_ra(struct address_space *mapping,
3705 struct file_ra_state *ra, struct file *file,
3706 pgoff_t offset, unsigned long req_size)
3708 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3711 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3712 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3713 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3714 struct btrfs_root *root,
3715 struct inode *dir, struct inode *inode,
3716 const char *name, int name_len);
3717 int btrfs_add_link(struct btrfs_trans_handle *trans,
3718 struct inode *parent_inode, struct inode *inode,
3719 const char *name, int name_len, int add_backref, u64 index);
3720 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3721 struct btrfs_root *root,
3722 struct inode *dir, u64 objectid,
3723 const char *name, int name_len);
3724 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3726 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3727 struct btrfs_root *root,
3728 struct inode *inode, u64 new_size,
3731 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3732 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput);
3733 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3734 struct extent_state **cached_state);
3735 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3736 struct btrfs_root *new_root,
3737 struct btrfs_root *parent_root,
3739 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3740 size_t size, struct bio *bio,
3741 unsigned long bio_flags);
3742 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3743 int btrfs_readpage(struct file *file, struct page *page);
3744 void btrfs_evict_inode(struct inode *inode);
3745 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3746 struct inode *btrfs_alloc_inode(struct super_block *sb);
3747 void btrfs_destroy_inode(struct inode *inode);
3748 int btrfs_drop_inode(struct inode *inode);
3749 int btrfs_init_cachep(void);
3750 void btrfs_destroy_cachep(void);
3751 long btrfs_ioctl_trans_end(struct file *file);
3752 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3753 struct btrfs_root *root, int *was_new);
3754 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3755 size_t pg_offset, u64 start, u64 end,
3757 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3758 struct btrfs_root *root,
3759 struct inode *inode);
3760 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3761 struct btrfs_root *root, struct inode *inode);
3762 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3763 int btrfs_orphan_cleanup(struct btrfs_root *root);
3764 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3765 struct btrfs_root *root);
3766 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3767 void btrfs_invalidate_inodes(struct btrfs_root *root);
3768 void btrfs_add_delayed_iput(struct inode *inode);
3769 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3770 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3771 u64 start, u64 num_bytes, u64 min_size,
3772 loff_t actual_len, u64 *alloc_hint);
3773 int btrfs_prealloc_file_range_trans(struct inode *inode,
3774 struct btrfs_trans_handle *trans, int mode,
3775 u64 start, u64 num_bytes, u64 min_size,
3776 loff_t actual_len, u64 *alloc_hint);
3777 extern const struct dentry_operations btrfs_dentry_operations;
3780 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3781 void btrfs_update_iflags(struct inode *inode);
3782 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3783 int btrfs_is_empty_uuid(u8 *uuid);
3784 int btrfs_defrag_file(struct inode *inode, struct file *file,
3785 struct btrfs_ioctl_defrag_range_args *range,
3786 u64 newer_than, unsigned long max_pages);
3787 void btrfs_get_block_group_info(struct list_head *groups_list,
3788 struct btrfs_ioctl_space_info *space);
3789 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3790 struct btrfs_ioctl_balance_args *bargs);
3794 int btrfs_auto_defrag_init(void);
3795 void btrfs_auto_defrag_exit(void);
3796 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3797 struct inode *inode);
3798 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3799 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3800 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3801 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3803 extern const struct file_operations btrfs_file_operations;
3804 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3805 struct btrfs_root *root, struct inode *inode,
3806 struct btrfs_path *path, u64 start, u64 end,
3807 u64 *drop_end, int drop_cache,
3809 u32 extent_item_size,
3811 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3812 struct btrfs_root *root, struct inode *inode, u64 start,
3813 u64 end, int drop_cache);
3814 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3815 struct inode *inode, u64 start, u64 end);
3816 int btrfs_release_file(struct inode *inode, struct file *file);
3817 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3818 struct page **pages, size_t num_pages,
3819 loff_t pos, size_t write_bytes,
3820 struct extent_state **cached);
3823 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3824 struct btrfs_root *root);
3827 int btrfs_init_sysfs(void);
3828 void btrfs_exit_sysfs(void);
3829 int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
3830 void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
3833 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3836 int btrfs_parse_options(struct btrfs_root *root, char *options);
3837 int btrfs_sync_fs(struct super_block *sb, int wait);
3839 #ifdef CONFIG_PRINTK
3841 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3843 static inline __printf(2, 3)
3844 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3849 #define btrfs_emerg(fs_info, fmt, args...) \
3850 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3851 #define btrfs_alert(fs_info, fmt, args...) \
3852 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3853 #define btrfs_crit(fs_info, fmt, args...) \
3854 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3855 #define btrfs_err(fs_info, fmt, args...) \
3856 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3857 #define btrfs_warn(fs_info, fmt, args...) \
3858 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3859 #define btrfs_notice(fs_info, fmt, args...) \
3860 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3861 #define btrfs_info(fs_info, fmt, args...) \
3862 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3865 #define btrfs_debug(fs_info, fmt, args...) \
3866 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3868 #define btrfs_debug(fs_info, fmt, args...) \
3869 no_printk(KERN_DEBUG fmt, ##args)
3872 #ifdef CONFIG_BTRFS_ASSERT
3874 static inline void assfail(char *expr, char *file, int line)
3876 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3881 #define ASSERT(expr) \
3882 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3884 #define ASSERT(expr) ((void)0)
3887 #define btrfs_assert()
3889 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3890 unsigned int line, int errno, const char *fmt, ...);
3893 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3894 struct btrfs_root *root, const char *function,
3895 unsigned int line, int errno);
3897 #define btrfs_set_fs_incompat(__fs_info, opt) \
3898 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3900 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3903 struct btrfs_super_block *disk_super;
3906 disk_super = fs_info->super_copy;
3907 features = btrfs_super_incompat_flags(disk_super);
3908 if (!(features & flag)) {
3909 spin_lock(&fs_info->super_lock);
3910 features = btrfs_super_incompat_flags(disk_super);
3911 if (!(features & flag)) {
3913 btrfs_set_super_incompat_flags(disk_super, features);
3914 btrfs_info(fs_info, "setting %llu feature flag",
3917 spin_unlock(&fs_info->super_lock);
3921 #define btrfs_fs_incompat(fs_info, opt) \
3922 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3924 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3926 struct btrfs_super_block *disk_super;
3927 disk_super = fs_info->super_copy;
3928 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3932 * Call btrfs_abort_transaction as early as possible when an error condition is
3933 * detected, that way the exact line number is reported.
3936 #define btrfs_abort_transaction(trans, root, errno) \
3938 __btrfs_abort_transaction(trans, root, __func__, \
3942 #define btrfs_std_error(fs_info, errno) \
3945 __btrfs_std_error((fs_info), __func__, \
3946 __LINE__, (errno), NULL); \
3949 #define btrfs_error(fs_info, errno, fmt, args...) \
3951 __btrfs_std_error((fs_info), __func__, __LINE__, \
3952 (errno), fmt, ##args); \
3956 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3957 unsigned int line, int errno, const char *fmt, ...);
3960 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3961 * will panic(). Otherwise we BUG() here.
3963 #define btrfs_panic(fs_info, errno, fmt, args...) \
3965 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3970 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3971 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3972 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3973 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3974 struct inode *inode, struct inode *dir);
3976 #define btrfs_get_acl NULL
3977 #define btrfs_set_acl NULL
3978 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3979 struct inode *inode, struct inode *dir)
3986 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3987 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3988 struct btrfs_root *root);
3989 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3990 struct btrfs_root *root);
3991 int btrfs_recover_relocation(struct btrfs_root *root);
3992 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3993 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3994 struct btrfs_root *root, struct extent_buffer *buf,
3995 struct extent_buffer *cow);
3996 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3997 struct btrfs_pending_snapshot *pending,
3998 u64 *bytes_to_reserve);
3999 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4000 struct btrfs_pending_snapshot *pending);
4003 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4004 u64 end, struct btrfs_scrub_progress *progress,
4005 int readonly, int is_dev_replace);
4006 void btrfs_scrub_pause(struct btrfs_root *root);
4007 void btrfs_scrub_continue(struct btrfs_root *root);
4008 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4009 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4010 struct btrfs_device *dev);
4011 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4012 struct btrfs_scrub_progress *progress);
4015 struct reada_control {
4016 struct btrfs_root *root; /* tree to prefetch */
4017 struct btrfs_key key_start;
4018 struct btrfs_key key_end; /* exclusive */
4021 wait_queue_head_t wait;
4023 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4024 struct btrfs_key *start, struct btrfs_key *end);
4025 int btrfs_reada_wait(void *handle);
4026 void btrfs_reada_detach(void *handle);
4027 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4028 u64 start, int err);
4031 struct qgroup_update {
4032 struct list_head list;
4033 struct btrfs_delayed_ref_node *node;
4034 struct btrfs_delayed_extent_op *extent_op;
4037 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
4038 struct btrfs_fs_info *fs_info);
4039 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
4040 struct btrfs_fs_info *fs_info);
4041 int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
4042 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
4043 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
4044 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
4045 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
4046 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
4047 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
4048 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
4049 struct btrfs_fs_info *fs_info, u64 qgroupid,
4051 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
4052 struct btrfs_fs_info *fs_info, u64 qgroupid);
4053 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
4054 struct btrfs_fs_info *fs_info, u64 qgroupid,
4055 struct btrfs_qgroup_limit *limit);
4056 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
4057 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
4058 struct btrfs_delayed_extent_op;
4059 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
4060 struct btrfs_delayed_ref_node *node,
4061 struct btrfs_delayed_extent_op *extent_op);
4062 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
4063 struct btrfs_fs_info *fs_info,
4064 struct btrfs_delayed_ref_node *node,
4065 struct btrfs_delayed_extent_op *extent_op);
4066 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
4067 struct btrfs_fs_info *fs_info);
4068 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
4069 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
4070 struct btrfs_qgroup_inherit *inherit);
4071 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
4072 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
4074 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
4076 static inline int is_fstree(u64 rootid)
4078 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4079 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4084 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4086 return signal_pending(current);
4089 /* Sanity test specific functions */
4090 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4091 void btrfs_test_destroy_inode(struct inode *inode);