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/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle;
40 struct btrfs_transaction;
41 struct btrfs_pending_snapshot;
42 extern struct kmem_cache *btrfs_trans_handle_cachep;
43 extern struct kmem_cache *btrfs_transaction_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 struct btrfs_ordered_sum;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 2
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for sotring
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
149 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
152 * we can actually store much bigger names, but lets not confuse the rest
155 #define BTRFS_NAME_LEN 255
157 /* 32 bytes in various csum fields */
158 #define BTRFS_CSUM_SIZE 32
161 #define BTRFS_CSUM_TYPE_CRC32 0
163 static int btrfs_csum_sizes[] = { 4, 0 };
165 /* four bytes for CRC32 */
166 #define BTRFS_EMPTY_DIR_SIZE 0
168 #define BTRFS_FT_UNKNOWN 0
169 #define BTRFS_FT_REG_FILE 1
170 #define BTRFS_FT_DIR 2
171 #define BTRFS_FT_CHRDEV 3
172 #define BTRFS_FT_BLKDEV 4
173 #define BTRFS_FT_FIFO 5
174 #define BTRFS_FT_SOCK 6
175 #define BTRFS_FT_SYMLINK 7
176 #define BTRFS_FT_XATTR 8
177 #define BTRFS_FT_MAX 9
179 /* ioprio of readahead is set to idle */
180 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
183 * The key defines the order in the tree, and so it also defines (optimal)
186 * objectid corresponds to the inode number.
188 * type tells us things about the object, and is a kind of stream selector.
189 * so for a given inode, keys with type of 1 might refer to the inode data,
190 * type of 2 may point to file data in the btree and type == 3 may point to
193 * offset is the starting byte offset for this key in the stream.
195 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
196 * in cpu native order. Otherwise they are identical and their sizes
197 * should be the same (ie both packed)
199 struct btrfs_disk_key {
203 } __attribute__ ((__packed__));
209 } __attribute__ ((__packed__));
211 struct btrfs_mapping_tree {
212 struct extent_map_tree map_tree;
215 struct btrfs_dev_item {
216 /* the internal btrfs device id */
219 /* size of the device */
225 /* optimal io alignment for this device */
228 /* optimal io width for this device */
231 /* minimal io size for this device */
234 /* type and info about this device */
237 /* expected generation for this device */
241 * starting byte of this partition on the device,
242 * to allow for stripe alignment in the future
246 /* grouping information for allocation decisions */
249 /* seek speed 0-100 where 100 is fastest */
252 /* bandwidth 0-100 where 100 is fastest */
255 /* btrfs generated uuid for this device */
256 u8 uuid[BTRFS_UUID_SIZE];
258 /* uuid of FS who owns this device */
259 u8 fsid[BTRFS_UUID_SIZE];
260 } __attribute__ ((__packed__));
262 struct btrfs_stripe {
265 u8 dev_uuid[BTRFS_UUID_SIZE];
266 } __attribute__ ((__packed__));
269 /* size of this chunk in bytes */
272 /* objectid of the root referencing this chunk */
278 /* optimal io alignment for this chunk */
281 /* optimal io width for this chunk */
284 /* minimal io size for this chunk */
287 /* 2^16 stripes is quite a lot, a second limit is the size of a single
292 /* sub stripes only matter for raid10 */
294 struct btrfs_stripe stripe;
295 /* additional stripes go here */
296 } __attribute__ ((__packed__));
298 #define BTRFS_FREE_SPACE_EXTENT 1
299 #define BTRFS_FREE_SPACE_BITMAP 2
301 struct btrfs_free_space_entry {
305 } __attribute__ ((__packed__));
307 struct btrfs_free_space_header {
308 struct btrfs_disk_key location;
312 } __attribute__ ((__packed__));
314 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
316 BUG_ON(num_stripes == 0);
317 return sizeof(struct btrfs_chunk) +
318 sizeof(struct btrfs_stripe) * (num_stripes - 1);
321 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
322 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
328 /* Errors detected */
329 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
331 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
332 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
334 #define BTRFS_BACKREF_REV_MAX 256
335 #define BTRFS_BACKREF_REV_SHIFT 56
336 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
337 BTRFS_BACKREF_REV_SHIFT)
339 #define BTRFS_OLD_BACKREF_REV 0
340 #define BTRFS_MIXED_BACKREF_REV 1
343 * every tree block (leaf or node) starts with this header.
345 struct btrfs_header {
346 /* these first four must match the super block */
347 u8 csum[BTRFS_CSUM_SIZE];
348 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
349 __le64 bytenr; /* which block this node is supposed to live in */
352 /* allowed to be different from the super from here on down */
353 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
358 } __attribute__ ((__packed__));
360 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
361 sizeof(struct btrfs_header)) / \
362 sizeof(struct btrfs_key_ptr))
363 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
364 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
365 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
366 sizeof(struct btrfs_item) - \
367 sizeof(struct btrfs_file_extent_item))
368 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
369 sizeof(struct btrfs_item) -\
370 sizeof(struct btrfs_dir_item))
374 * this is a very generous portion of the super block, giving us
375 * room to translate 14 chunks with 3 stripes each.
377 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
378 #define BTRFS_LABEL_SIZE 256
381 * just in case we somehow lose the roots and are not able to mount,
382 * we store an array of the roots from previous transactions
385 #define BTRFS_NUM_BACKUP_ROOTS 4
386 struct btrfs_root_backup {
388 __le64 tree_root_gen;
391 __le64 chunk_root_gen;
394 __le64 extent_root_gen;
403 __le64 csum_root_gen;
413 u8 extent_root_level;
417 /* future and to align */
419 } __attribute__ ((__packed__));
422 * the super block basically lists the main trees of the FS
423 * it currently lacks any block count etc etc
425 struct btrfs_super_block {
426 u8 csum[BTRFS_CSUM_SIZE];
427 /* the first 4 fields must match struct btrfs_header */
428 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
429 __le64 bytenr; /* this block number */
432 /* allowed to be different from the btrfs_header from here own down */
439 /* this will help find the new super based on the log root */
440 __le64 log_root_transid;
443 __le64 root_dir_objectid;
449 __le32 sys_chunk_array_size;
450 __le64 chunk_root_generation;
452 __le64 compat_ro_flags;
453 __le64 incompat_flags;
458 struct btrfs_dev_item dev_item;
460 char label[BTRFS_LABEL_SIZE];
462 __le64 cache_generation;
464 /* future expansion */
466 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
467 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
468 } __attribute__ ((__packed__));
471 * Compat flags that we support. If any incompat flags are set other than the
472 * ones specified below then we will fail to mount
474 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
475 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
476 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
477 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
479 * some patches floated around with a second compression method
480 * lets save that incompat here for when they do get in
481 * Note we don't actually support it, we're just reserving the
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
487 * older kernels tried to do bigger metadata blocks, but the
488 * code was pretty buggy. Lets not let them try anymore.
490 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
492 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
493 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
494 #define BTRFS_FEATURE_INCOMPAT_SUPP \
495 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
496 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
497 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
498 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
499 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
502 * A leaf is full of items. offset and size tell us where to find
503 * the item in the leaf (relative to the start of the data area)
506 struct btrfs_disk_key key;
509 } __attribute__ ((__packed__));
512 * leaves have an item area and a data area:
513 * [item0, item1....itemN] [free space] [dataN...data1, data0]
515 * The data is separate from the items to get the keys closer together
519 struct btrfs_header header;
520 struct btrfs_item items[];
521 } __attribute__ ((__packed__));
524 * all non-leaf blocks are nodes, they hold only keys and pointers to
527 struct btrfs_key_ptr {
528 struct btrfs_disk_key key;
531 } __attribute__ ((__packed__));
534 struct btrfs_header header;
535 struct btrfs_key_ptr ptrs[];
536 } __attribute__ ((__packed__));
539 * btrfs_paths remember the path taken from the root down to the leaf.
540 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
541 * to any other levels that are present.
543 * The slots array records the index of the item or block pointer
544 * used while walking the tree.
547 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
548 int slots[BTRFS_MAX_LEVEL];
549 /* if there is real range locking, this locks field will change */
550 int locks[BTRFS_MAX_LEVEL];
552 /* keep some upper locks as we walk down */
556 * set by btrfs_split_item, tells search_slot to keep all locks
557 * and to force calls to keep space in the nodes
559 unsigned int search_for_split:1;
560 unsigned int keep_locks:1;
561 unsigned int skip_locking:1;
562 unsigned int leave_spinning:1;
563 unsigned int search_commit_root:1;
567 * items in the extent btree are used to record the objectid of the
568 * owner of the block and the number of references
571 struct btrfs_extent_item {
575 } __attribute__ ((__packed__));
577 struct btrfs_extent_item_v0 {
579 } __attribute__ ((__packed__));
581 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
582 sizeof(struct btrfs_item))
584 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
585 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
587 /* following flags only apply to tree blocks */
589 /* use full backrefs for extent pointers in the block */
590 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
593 * this flag is only used internally by scrub and may be changed at any time
594 * it is only declared here to avoid collisions
596 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
598 struct btrfs_tree_block_info {
599 struct btrfs_disk_key key;
601 } __attribute__ ((__packed__));
603 struct btrfs_extent_data_ref {
608 } __attribute__ ((__packed__));
610 struct btrfs_shared_data_ref {
612 } __attribute__ ((__packed__));
614 struct btrfs_extent_inline_ref {
617 } __attribute__ ((__packed__));
619 /* old style backrefs item */
620 struct btrfs_extent_ref_v0 {
625 } __attribute__ ((__packed__));
628 /* dev extents record free space on individual devices. The owner
629 * field points back to the chunk allocation mapping tree that allocated
630 * the extent. The chunk tree uuid field is a way to double check the owner
632 struct btrfs_dev_extent {
634 __le64 chunk_objectid;
637 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
638 } __attribute__ ((__packed__));
640 struct btrfs_inode_ref {
644 } __attribute__ ((__packed__));
646 struct btrfs_timespec {
649 } __attribute__ ((__packed__));
651 enum btrfs_compression_type {
652 BTRFS_COMPRESS_NONE = 0,
653 BTRFS_COMPRESS_ZLIB = 1,
654 BTRFS_COMPRESS_LZO = 2,
655 BTRFS_COMPRESS_TYPES = 2,
656 BTRFS_COMPRESS_LAST = 3,
659 struct btrfs_inode_item {
660 /* nfs style generation number */
662 /* transid that last touched this inode */
674 /* modification sequence number for NFS */
678 * a little future expansion, for more than this we can
679 * just grow the inode item and version it
682 struct btrfs_timespec atime;
683 struct btrfs_timespec ctime;
684 struct btrfs_timespec mtime;
685 struct btrfs_timespec otime;
686 } __attribute__ ((__packed__));
688 struct btrfs_dir_log_item {
690 } __attribute__ ((__packed__));
692 struct btrfs_dir_item {
693 struct btrfs_disk_key location;
698 } __attribute__ ((__packed__));
700 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
702 struct btrfs_root_item {
703 struct btrfs_inode_item inode;
709 __le64 last_snapshot;
712 struct btrfs_disk_key drop_progress;
717 * The following fields appear after subvol_uuids+subvol_times
722 * This generation number is used to test if the new fields are valid
723 * and up to date while reading the root item. Everytime the root item
724 * is written out, the "generation" field is copied into this field. If
725 * anyone ever mounted the fs with an older kernel, we will have
726 * mismatching generation values here and thus must invalidate the
727 * new fields. See btrfs_update_root and btrfs_find_last_root for
729 * the offset of generation_v2 is also used as the start for the memset
730 * when invalidating the fields.
732 __le64 generation_v2;
733 u8 uuid[BTRFS_UUID_SIZE];
734 u8 parent_uuid[BTRFS_UUID_SIZE];
735 u8 received_uuid[BTRFS_UUID_SIZE];
736 __le64 ctransid; /* updated when an inode changes */
737 __le64 otransid; /* trans when created */
738 __le64 stransid; /* trans when sent. non-zero for received subvol */
739 __le64 rtransid; /* trans when received. non-zero for received subvol */
740 struct btrfs_timespec ctime;
741 struct btrfs_timespec otime;
742 struct btrfs_timespec stime;
743 struct btrfs_timespec rtime;
744 __le64 reserved[8]; /* for future */
745 } __attribute__ ((__packed__));
748 * this is used for both forward and backward root refs
750 struct btrfs_root_ref {
754 } __attribute__ ((__packed__));
756 struct btrfs_disk_balance_args {
758 * profiles to operate on, single is denoted by
759 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
769 /* devid subset filter [pstart..pend) */
773 /* btrfs virtual address space subset filter [vstart..vend) */
778 * profile to convert to, single is denoted by
779 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
783 /* BTRFS_BALANCE_ARGS_* */
787 } __attribute__ ((__packed__));
790 * store balance parameters to disk so that balance can be properly
791 * resumed after crash or unmount
793 struct btrfs_balance_item {
794 /* BTRFS_BALANCE_* */
797 struct btrfs_disk_balance_args data;
798 struct btrfs_disk_balance_args meta;
799 struct btrfs_disk_balance_args sys;
802 } __attribute__ ((__packed__));
804 #define BTRFS_FILE_EXTENT_INLINE 0
805 #define BTRFS_FILE_EXTENT_REG 1
806 #define BTRFS_FILE_EXTENT_PREALLOC 2
808 struct btrfs_file_extent_item {
810 * transaction id that created this extent
814 * max number of bytes to hold this extent in ram
815 * when we split a compressed extent we can't know how big
816 * each of the resulting pieces will be. So, this is
817 * an upper limit on the size of the extent in ram instead of
823 * 32 bits for the various ways we might encode the data,
824 * including compression and encryption. If any of these
825 * are set to something a given disk format doesn't understand
826 * it is treated like an incompat flag for reading and writing,
831 __le16 other_encoding; /* spare for later use */
833 /* are we inline data or a real extent? */
837 * disk space consumed by the extent, checksum blocks are included
841 __le64 disk_num_bytes;
843 * the logical offset in file blocks (no csums)
844 * this extent record is for. This allows a file extent to point
845 * into the middle of an existing extent on disk, sharing it
846 * between two snapshots (useful if some bytes in the middle of the
847 * extent have changed
851 * the logical number of file blocks (no csums included). This
852 * always reflects the size uncompressed and without encoding.
856 } __attribute__ ((__packed__));
858 struct btrfs_csum_item {
860 } __attribute__ ((__packed__));
862 struct btrfs_dev_stats_item {
864 * grow this item struct at the end for future enhancements and keep
865 * the existing values unchanged
867 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
868 } __attribute__ ((__packed__));
870 /* different types of block groups (and chunks) */
871 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
872 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
873 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
874 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
875 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
876 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
877 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
878 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
879 #define BTRFS_NR_RAID_TYPES 5
881 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
882 BTRFS_BLOCK_GROUP_SYSTEM | \
883 BTRFS_BLOCK_GROUP_METADATA)
885 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
886 BTRFS_BLOCK_GROUP_RAID1 | \
887 BTRFS_BLOCK_GROUP_DUP | \
888 BTRFS_BLOCK_GROUP_RAID10)
890 * We need a bit for restriper to be able to tell when chunks of type
891 * SINGLE are available. This "extended" profile format is used in
892 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
893 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
894 * to avoid remappings between two formats in future.
896 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
898 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
899 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
901 static inline u64 chunk_to_extended(u64 flags)
903 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
904 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
908 static inline u64 extended_to_chunk(u64 flags)
910 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
913 struct btrfs_block_group_item {
915 __le64 chunk_objectid;
917 } __attribute__ ((__packed__));
920 * is subvolume quota turned on?
922 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
924 * SCANNING is set during the initialization phase
926 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
928 * Some qgroup entries are known to be out of date,
929 * either because the configuration has changed in a way that
930 * makes a rescan necessary, or because the fs has been mounted
931 * with a non-qgroup-aware version.
932 * Turning qouta off and on again makes it inconsistent, too.
934 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
936 #define BTRFS_QGROUP_STATUS_VERSION 1
938 struct btrfs_qgroup_status_item {
941 * the generation is updated during every commit. As older
942 * versions of btrfs are not aware of qgroups, it will be
943 * possible to detect inconsistencies by checking the
944 * generation on mount time
948 /* flag definitions see above */
952 * only used during scanning to record the progress
953 * of the scan. It contains a logical address
956 } __attribute__ ((__packed__));
958 struct btrfs_qgroup_info_item {
964 } __attribute__ ((__packed__));
966 /* flags definition for qgroup limits */
967 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
968 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
969 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
970 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
971 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
972 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
974 struct btrfs_qgroup_limit_item {
976 * only updated when any of the other values change
983 } __attribute__ ((__packed__));
985 struct btrfs_space_info {
988 u64 total_bytes; /* total bytes in the space,
989 this doesn't take mirrors into account */
990 u64 bytes_used; /* total bytes used,
991 this doesn't take mirrors into account */
992 u64 bytes_pinned; /* total bytes pinned, will be freed when the
993 transaction finishes */
994 u64 bytes_reserved; /* total bytes the allocator has reserved for
995 current allocations */
996 u64 bytes_readonly; /* total bytes that are read only */
998 u64 bytes_may_use; /* number of bytes that may be used for
999 delalloc/allocations */
1000 u64 disk_used; /* total bytes used on disk */
1001 u64 disk_total; /* total bytes on disk, takes mirrors into
1005 * we bump reservation progress every time we decrement
1006 * bytes_reserved. This way people waiting for reservations
1007 * know something good has happened and they can check
1008 * for progress. The number here isn't to be trusted, it
1009 * just shows reclaim activity
1011 unsigned long reservation_progress;
1013 unsigned int full:1; /* indicates that we cannot allocate any more
1014 chunks for this space */
1015 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1017 unsigned int flush:1; /* set if we are trying to make space */
1019 unsigned int force_alloc; /* set if we need to force a chunk
1020 alloc for this space */
1022 struct list_head list;
1024 /* for block groups in our same type */
1025 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1027 struct rw_semaphore groups_sem;
1028 wait_queue_head_t wait;
1031 #define BTRFS_BLOCK_RSV_GLOBAL 1
1032 #define BTRFS_BLOCK_RSV_DELALLOC 2
1033 #define BTRFS_BLOCK_RSV_TRANS 3
1034 #define BTRFS_BLOCK_RSV_CHUNK 4
1035 #define BTRFS_BLOCK_RSV_DELOPS 5
1036 #define BTRFS_BLOCK_RSV_EMPTY 6
1037 #define BTRFS_BLOCK_RSV_TEMP 7
1039 struct btrfs_block_rsv {
1042 struct btrfs_space_info *space_info;
1044 unsigned short full;
1045 unsigned short type;
1046 unsigned short failfast;
1050 * free clusters are used to claim free space in relatively large chunks,
1051 * allowing us to do less seeky writes. They are used for all metadata
1052 * allocations and data allocations in ssd mode.
1054 struct btrfs_free_cluster {
1056 spinlock_t refill_lock;
1057 struct rb_root root;
1059 /* largest extent in this cluster */
1062 /* first extent starting offset */
1065 struct btrfs_block_group_cache *block_group;
1067 * when a cluster is allocated from a block group, we put the
1068 * cluster onto a list in the block group so that it can
1069 * be freed before the block group is freed.
1071 struct list_head block_group_list;
1074 enum btrfs_caching_type {
1076 BTRFS_CACHE_STARTED = 1,
1077 BTRFS_CACHE_FAST = 2,
1078 BTRFS_CACHE_FINISHED = 3,
1081 enum btrfs_disk_cache_state {
1082 BTRFS_DC_WRITTEN = 0,
1086 BTRFS_DC_NEED_WRITE = 4,
1089 struct btrfs_caching_control {
1090 struct list_head list;
1092 wait_queue_head_t wait;
1093 struct btrfs_work work;
1094 struct btrfs_block_group_cache *block_group;
1099 struct btrfs_block_group_cache {
1100 struct btrfs_key key;
1101 struct btrfs_block_group_item item;
1102 struct btrfs_fs_info *fs_info;
1103 struct inode *inode;
1110 u64 cache_generation;
1112 unsigned int dirty:1;
1113 unsigned int iref:1;
1115 int disk_cache_state;
1117 /* cache tracking stuff */
1119 struct btrfs_caching_control *caching_ctl;
1120 u64 last_byte_to_unpin;
1122 struct btrfs_space_info *space_info;
1124 /* free space cache stuff */
1125 struct btrfs_free_space_ctl *free_space_ctl;
1127 /* block group cache stuff */
1128 struct rb_node cache_node;
1130 /* for block groups in the same raid type */
1131 struct list_head list;
1136 /* List of struct btrfs_free_clusters for this block group.
1137 * Today it will only have one thing on it, but that may change
1139 struct list_head cluster_list;
1141 /* For delayed block group creation */
1142 struct list_head new_bg_list;
1145 /* delayed seq elem */
1147 struct list_head list;
1152 struct reloc_control;
1153 struct btrfs_device;
1154 struct btrfs_fs_devices;
1155 struct btrfs_balance_control;
1156 struct btrfs_delayed_root;
1157 struct btrfs_fs_info {
1158 u8 fsid[BTRFS_FSID_SIZE];
1159 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1160 struct btrfs_root *extent_root;
1161 struct btrfs_root *tree_root;
1162 struct btrfs_root *chunk_root;
1163 struct btrfs_root *dev_root;
1164 struct btrfs_root *fs_root;
1165 struct btrfs_root *csum_root;
1166 struct btrfs_root *quota_root;
1168 /* the log root tree is a directory of all the other log roots */
1169 struct btrfs_root *log_root_tree;
1171 spinlock_t fs_roots_radix_lock;
1172 struct radix_tree_root fs_roots_radix;
1174 /* block group cache stuff */
1175 spinlock_t block_group_cache_lock;
1176 struct rb_root block_group_cache_tree;
1178 /* keep track of unallocated space */
1179 spinlock_t free_chunk_lock;
1180 u64 free_chunk_space;
1182 struct extent_io_tree freed_extents[2];
1183 struct extent_io_tree *pinned_extents;
1185 /* logical->physical extent mapping */
1186 struct btrfs_mapping_tree mapping_tree;
1189 * block reservation for extent, checksum, root tree and
1190 * delayed dir index item
1192 struct btrfs_block_rsv global_block_rsv;
1193 /* block reservation for delay allocation */
1194 struct btrfs_block_rsv delalloc_block_rsv;
1195 /* block reservation for metadata operations */
1196 struct btrfs_block_rsv trans_block_rsv;
1197 /* block reservation for chunk tree */
1198 struct btrfs_block_rsv chunk_block_rsv;
1199 /* block reservation for delayed operations */
1200 struct btrfs_block_rsv delayed_block_rsv;
1202 struct btrfs_block_rsv empty_block_rsv;
1205 u64 last_trans_committed;
1208 * this is updated to the current trans every time a full commit
1209 * is required instead of the faster short fsync log commits
1211 u64 last_trans_log_full_commit;
1212 unsigned long mount_opt;
1213 unsigned long compress_type:4;
1216 struct btrfs_transaction *running_transaction;
1217 wait_queue_head_t transaction_throttle;
1218 wait_queue_head_t transaction_wait;
1219 wait_queue_head_t transaction_blocked_wait;
1220 wait_queue_head_t async_submit_wait;
1222 struct btrfs_super_block *super_copy;
1223 struct btrfs_super_block *super_for_commit;
1224 struct block_device *__bdev;
1225 struct super_block *sb;
1226 struct inode *btree_inode;
1227 struct backing_dev_info bdi;
1228 struct mutex tree_log_mutex;
1229 struct mutex transaction_kthread_mutex;
1230 struct mutex cleaner_mutex;
1231 struct mutex chunk_mutex;
1232 struct mutex volume_mutex;
1234 * this protects the ordered operations list only while we are
1235 * processing all of the entries on it. This way we make
1236 * sure the commit code doesn't find the list temporarily empty
1237 * because another function happens to be doing non-waiting preflush
1238 * before jumping into the main commit.
1240 struct mutex ordered_operations_mutex;
1241 struct rw_semaphore extent_commit_sem;
1243 struct rw_semaphore cleanup_work_sem;
1245 struct rw_semaphore subvol_sem;
1246 struct srcu_struct subvol_srcu;
1248 spinlock_t trans_lock;
1250 * the reloc mutex goes with the trans lock, it is taken
1251 * during commit to protect us from the relocation code
1253 struct mutex reloc_mutex;
1255 struct list_head trans_list;
1256 struct list_head dead_roots;
1257 struct list_head caching_block_groups;
1259 spinlock_t delayed_iput_lock;
1260 struct list_head delayed_iputs;
1262 /* this protects tree_mod_seq_list */
1263 spinlock_t tree_mod_seq_lock;
1264 atomic_t tree_mod_seq;
1265 struct list_head tree_mod_seq_list;
1266 struct seq_list tree_mod_seq_elem;
1268 /* this protects tree_mod_log */
1269 rwlock_t tree_mod_log_lock;
1270 struct rb_root tree_mod_log;
1272 atomic_t nr_async_submits;
1273 atomic_t async_submit_draining;
1274 atomic_t nr_async_bios;
1275 atomic_t async_delalloc_pages;
1276 atomic_t open_ioctl_trans;
1279 * this is used by the balancing code to wait for all the pending
1282 spinlock_t ordered_extent_lock;
1285 * all of the data=ordered extents pending writeback
1286 * these can span multiple transactions and basically include
1287 * every dirty data page that isn't from nodatacow
1289 struct list_head ordered_extents;
1292 * all of the inodes that have delalloc bytes. It is possible for
1293 * this list to be empty even when there is still dirty data=ordered
1294 * extents waiting to finish IO.
1296 struct list_head delalloc_inodes;
1299 * special rename and truncate targets that must be on disk before
1300 * we're allowed to commit. This is basically the ext3 style
1301 * data=ordered list.
1303 struct list_head ordered_operations;
1306 * there is a pool of worker threads for checksumming during writes
1307 * and a pool for checksumming after reads. This is because readers
1308 * can run with FS locks held, and the writers may be waiting for
1309 * those locks. We don't want ordering in the pending list to cause
1310 * deadlocks, and so the two are serviced separately.
1312 * A third pool does submit_bio to avoid deadlocking with the other
1315 struct btrfs_workers generic_worker;
1316 struct btrfs_workers workers;
1317 struct btrfs_workers delalloc_workers;
1318 struct btrfs_workers endio_workers;
1319 struct btrfs_workers endio_meta_workers;
1320 struct btrfs_workers endio_meta_write_workers;
1321 struct btrfs_workers endio_write_workers;
1322 struct btrfs_workers endio_freespace_worker;
1323 struct btrfs_workers submit_workers;
1324 struct btrfs_workers caching_workers;
1325 struct btrfs_workers readahead_workers;
1328 * fixup workers take dirty pages that didn't properly go through
1329 * the cow mechanism and make them safe to write. It happens
1330 * for the sys_munmap function call path
1332 struct btrfs_workers fixup_workers;
1333 struct btrfs_workers delayed_workers;
1334 struct task_struct *transaction_kthread;
1335 struct task_struct *cleaner_kthread;
1336 int thread_pool_size;
1338 struct kobject super_kobj;
1339 struct completion kobj_unregister;
1342 int log_root_recovering;
1348 /* protected by the delalloc lock, used to keep from writing
1349 * metadata until there is a nice batch
1351 u64 dirty_metadata_bytes;
1352 struct list_head dirty_cowonly_roots;
1354 struct btrfs_fs_devices *fs_devices;
1357 * the space_info list is almost entirely read only. It only changes
1358 * when we add a new raid type to the FS, and that happens
1359 * very rarely. RCU is used to protect it.
1361 struct list_head space_info;
1363 struct btrfs_space_info *data_sinfo;
1365 struct reloc_control *reloc_ctl;
1367 spinlock_t delalloc_lock;
1370 /* data_alloc_cluster is only used in ssd mode */
1371 struct btrfs_free_cluster data_alloc_cluster;
1373 /* all metadata allocations go through this cluster */
1374 struct btrfs_free_cluster meta_alloc_cluster;
1376 /* auto defrag inodes go here */
1377 spinlock_t defrag_inodes_lock;
1378 struct rb_root defrag_inodes;
1379 atomic_t defrag_running;
1382 * these three are in extended format (availability of single
1383 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1384 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1386 u64 avail_data_alloc_bits;
1387 u64 avail_metadata_alloc_bits;
1388 u64 avail_system_alloc_bits;
1390 /* restriper state */
1391 spinlock_t balance_lock;
1392 struct mutex balance_mutex;
1393 atomic_t balance_running;
1394 atomic_t balance_pause_req;
1395 atomic_t balance_cancel_req;
1396 struct btrfs_balance_control *balance_ctl;
1397 wait_queue_head_t balance_wait_q;
1399 unsigned data_chunk_allocations;
1400 unsigned metadata_ratio;
1404 /* private scrub information */
1405 struct mutex scrub_lock;
1406 atomic_t scrubs_running;
1407 atomic_t scrub_pause_req;
1408 atomic_t scrubs_paused;
1409 atomic_t scrub_cancel_req;
1410 wait_queue_head_t scrub_pause_wait;
1411 struct rw_semaphore scrub_super_lock;
1412 int scrub_workers_refcnt;
1413 struct btrfs_workers scrub_workers;
1415 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1416 u32 check_integrity_print_mask;
1421 unsigned int quota_enabled:1;
1424 * quota_enabled only changes state after a commit. This holds the
1427 unsigned int pending_quota_state:1;
1429 /* is qgroup tracking in a consistent state? */
1432 /* holds configuration and tracking. Protected by qgroup_lock */
1433 struct rb_root qgroup_tree;
1434 spinlock_t qgroup_lock;
1436 /* list of dirty qgroups to be written at next commit */
1437 struct list_head dirty_qgroups;
1439 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1442 /* filesystem state */
1445 struct btrfs_delayed_root *delayed_root;
1447 /* readahead tree */
1448 spinlock_t reada_lock;
1449 struct radix_tree_root reada_tree;
1451 /* next backup root to be overwritten */
1452 int backup_root_index;
1456 * in ram representation of the tree. extent_root is used for all allocations
1457 * and for the extent tree extent_root root.
1460 struct extent_buffer *node;
1462 struct extent_buffer *commit_root;
1463 struct btrfs_root *log_root;
1464 struct btrfs_root *reloc_root;
1466 struct btrfs_root_item root_item;
1467 struct btrfs_key root_key;
1468 struct btrfs_fs_info *fs_info;
1469 struct extent_io_tree dirty_log_pages;
1471 struct kobject root_kobj;
1472 struct completion kobj_unregister;
1473 struct mutex objectid_mutex;
1475 spinlock_t accounting_lock;
1476 struct btrfs_block_rsv *block_rsv;
1478 /* free ino cache stuff */
1479 struct mutex fs_commit_mutex;
1480 struct btrfs_free_space_ctl *free_ino_ctl;
1481 enum btrfs_caching_type cached;
1482 spinlock_t cache_lock;
1483 wait_queue_head_t cache_wait;
1484 struct btrfs_free_space_ctl *free_ino_pinned;
1486 struct inode *cache_inode;
1488 struct mutex log_mutex;
1489 wait_queue_head_t log_writer_wait;
1490 wait_queue_head_t log_commit_wait[2];
1491 atomic_t log_writers;
1492 atomic_t log_commit[2];
1494 unsigned long log_transid;
1495 unsigned long last_log_commit;
1496 pid_t log_start_pid;
1497 bool log_multiple_pids;
1502 /* data allocations are done in sectorsize units */
1505 /* node allocations are done in nodesize units */
1508 /* leaf allocations are done in leafsize units */
1515 u64 highest_objectid;
1517 /* btrfs_record_root_in_trans is a multi-step process,
1518 * and it can race with the balancing code. But the
1519 * race is very small, and only the first time the root
1520 * is added to each transaction. So in_trans_setup
1521 * is used to tell us when more checks are required
1523 unsigned long in_trans_setup;
1528 u64 defrag_trans_start;
1529 struct btrfs_key defrag_progress;
1530 struct btrfs_key defrag_max;
1534 /* the dirty list is only used by non-reference counted roots */
1535 struct list_head dirty_list;
1537 struct list_head root_list;
1539 spinlock_t orphan_lock;
1540 atomic_t orphan_inodes;
1541 struct btrfs_block_rsv *orphan_block_rsv;
1542 int orphan_item_inserted;
1543 int orphan_cleanup_state;
1545 spinlock_t inode_lock;
1546 /* red-black tree that keeps track of in-memory inodes */
1547 struct rb_root inode_tree;
1550 * radix tree that keeps track of delayed nodes of every inode,
1551 * protected by inode_lock
1553 struct radix_tree_root delayed_nodes_tree;
1555 * right now this just gets used so that a root has its own devid
1556 * for stat. It may be used for more later
1562 spinlock_t root_times_lock;
1565 struct btrfs_ioctl_defrag_range_args {
1566 /* start of the defrag operation */
1569 /* number of bytes to defrag, use (u64)-1 to say all */
1573 * flags for the operation, which can include turning
1574 * on compression for this one defrag
1579 * any extent bigger than this will be considered
1580 * already defragged. Use 0 to take the kernel default
1581 * Use 1 to say every single extent must be rewritten
1583 __u32 extent_thresh;
1586 * which compression method to use if turning on compression
1587 * for this defrag operation. If unspecified, zlib will
1590 __u32 compress_type;
1592 /* spare for later */
1598 * inode items have the data typically returned from stat and store other
1599 * info about object characteristics. There is one for every file and dir in
1602 #define BTRFS_INODE_ITEM_KEY 1
1603 #define BTRFS_INODE_REF_KEY 12
1604 #define BTRFS_XATTR_ITEM_KEY 24
1605 #define BTRFS_ORPHAN_ITEM_KEY 48
1606 /* reserve 2-15 close to the inode for later flexibility */
1609 * dir items are the name -> inode pointers in a directory. There is one
1610 * for every name in a directory.
1612 #define BTRFS_DIR_LOG_ITEM_KEY 60
1613 #define BTRFS_DIR_LOG_INDEX_KEY 72
1614 #define BTRFS_DIR_ITEM_KEY 84
1615 #define BTRFS_DIR_INDEX_KEY 96
1617 * extent data is for file data
1619 #define BTRFS_EXTENT_DATA_KEY 108
1622 * extent csums are stored in a separate tree and hold csums for
1623 * an entire extent on disk.
1625 #define BTRFS_EXTENT_CSUM_KEY 128
1628 * root items point to tree roots. They are typically in the root
1629 * tree used by the super block to find all the other trees
1631 #define BTRFS_ROOT_ITEM_KEY 132
1634 * root backrefs tie subvols and snapshots to the directory entries that
1637 #define BTRFS_ROOT_BACKREF_KEY 144
1640 * root refs make a fast index for listing all of the snapshots and
1641 * subvolumes referenced by a given root. They point directly to the
1642 * directory item in the root that references the subvol
1644 #define BTRFS_ROOT_REF_KEY 156
1647 * extent items are in the extent map tree. These record which blocks
1648 * are used, and how many references there are to each block
1650 #define BTRFS_EXTENT_ITEM_KEY 168
1652 #define BTRFS_TREE_BLOCK_REF_KEY 176
1654 #define BTRFS_EXTENT_DATA_REF_KEY 178
1656 #define BTRFS_EXTENT_REF_V0_KEY 180
1658 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1660 #define BTRFS_SHARED_DATA_REF_KEY 184
1663 * block groups give us hints into the extent allocation trees. Which
1664 * blocks are free etc etc
1666 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1668 #define BTRFS_DEV_EXTENT_KEY 204
1669 #define BTRFS_DEV_ITEM_KEY 216
1670 #define BTRFS_CHUNK_ITEM_KEY 228
1673 * Records the overall state of the qgroups.
1674 * There's only one instance of this key present,
1675 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1677 #define BTRFS_QGROUP_STATUS_KEY 240
1679 * Records the currently used space of the qgroup.
1680 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1682 #define BTRFS_QGROUP_INFO_KEY 242
1684 * Contains the user configured limits for the qgroup.
1685 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1687 #define BTRFS_QGROUP_LIMIT_KEY 244
1689 * Records the child-parent relationship of qgroups. For
1690 * each relation, 2 keys are present:
1691 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1692 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1694 #define BTRFS_QGROUP_RELATION_KEY 246
1696 #define BTRFS_BALANCE_ITEM_KEY 248
1699 * Persistantly stores the io stats in the device tree.
1700 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1702 #define BTRFS_DEV_STATS_KEY 249
1705 * string items are for debugging. They just store a short string of
1708 #define BTRFS_STRING_ITEM_KEY 253
1711 * Flags for mount options.
1713 * Note: don't forget to add new options to btrfs_show_options()
1715 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1716 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1717 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1718 #define BTRFS_MOUNT_SSD (1 << 3)
1719 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1720 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1721 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1722 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1723 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1724 #define BTRFS_MOUNT_NOSSD (1 << 9)
1725 #define BTRFS_MOUNT_DISCARD (1 << 10)
1726 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1727 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1728 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1729 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1730 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1731 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1732 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1733 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1734 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1735 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1736 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1737 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1739 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1740 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1741 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1746 #define BTRFS_INODE_NODATASUM (1 << 0)
1747 #define BTRFS_INODE_NODATACOW (1 << 1)
1748 #define BTRFS_INODE_READONLY (1 << 2)
1749 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1750 #define BTRFS_INODE_PREALLOC (1 << 4)
1751 #define BTRFS_INODE_SYNC (1 << 5)
1752 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1753 #define BTRFS_INODE_APPEND (1 << 7)
1754 #define BTRFS_INODE_NODUMP (1 << 8)
1755 #define BTRFS_INODE_NOATIME (1 << 9)
1756 #define BTRFS_INODE_DIRSYNC (1 << 10)
1757 #define BTRFS_INODE_COMPRESS (1 << 11)
1759 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1761 struct btrfs_map_token {
1762 struct extent_buffer *eb;
1764 unsigned long offset;
1767 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1769 memset(token, 0, sizeof(*token));
1772 /* some macros to generate set/get funcs for the struct fields. This
1773 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1776 #define le8_to_cpu(v) (v)
1777 #define cpu_to_le8(v) (v)
1780 #define read_eb_member(eb, ptr, type, member, result) ( \
1781 read_extent_buffer(eb, (char *)(result), \
1782 ((unsigned long)(ptr)) + \
1783 offsetof(type, member), \
1784 sizeof(((type *)0)->member)))
1786 #define write_eb_member(eb, ptr, type, member, result) ( \
1787 write_extent_buffer(eb, (char *)(result), \
1788 ((unsigned long)(ptr)) + \
1789 offsetof(type, member), \
1790 sizeof(((type *)0)->member)))
1792 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1793 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1794 unsigned long off, \
1795 struct btrfs_map_token *token); \
1796 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1797 unsigned long off, u##bits val, \
1798 struct btrfs_map_token *token); \
1799 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1800 unsigned long off) \
1802 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1804 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1805 unsigned long off, u##bits val) \
1807 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1810 DECLARE_BTRFS_SETGET_BITS(8)
1811 DECLARE_BTRFS_SETGET_BITS(16)
1812 DECLARE_BTRFS_SETGET_BITS(32)
1813 DECLARE_BTRFS_SETGET_BITS(64)
1815 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1816 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1818 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1819 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1821 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1824 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1825 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1827 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1828 struct btrfs_map_token *token) \
1830 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1831 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1833 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1834 type *s, u##bits val, \
1835 struct btrfs_map_token *token) \
1837 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1838 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1841 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1842 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1844 type *p = page_address(eb->pages[0]); \
1845 u##bits res = le##bits##_to_cpu(p->member); \
1848 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1851 type *p = page_address(eb->pages[0]); \
1852 p->member = cpu_to_le##bits(val); \
1855 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1856 static inline u##bits btrfs_##name(type *s) \
1858 return le##bits##_to_cpu(s->member); \
1860 static inline void btrfs_set_##name(type *s, u##bits val) \
1862 s->member = cpu_to_le##bits(val); \
1865 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1866 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1867 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1868 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1869 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1870 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1872 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1873 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1874 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1875 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1876 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1877 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1879 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1880 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1882 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1884 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1886 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1888 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1890 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1891 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1893 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1895 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1897 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1900 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1902 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1905 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1907 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1910 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1911 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1912 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1913 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1914 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1915 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1916 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1917 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1918 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1919 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1920 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1922 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1924 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1927 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1928 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1929 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1931 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1933 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1935 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1937 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1938 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1940 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1942 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1943 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1945 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1948 unsigned long offset = (unsigned long)c;
1949 offset += offsetof(struct btrfs_chunk, stripe);
1950 offset += nr * sizeof(struct btrfs_stripe);
1951 return (struct btrfs_stripe *)offset;
1954 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1956 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1959 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1960 struct btrfs_chunk *c, int nr)
1962 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1965 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1966 struct btrfs_chunk *c, int nr)
1968 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1971 /* struct btrfs_block_group_item */
1972 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1974 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1976 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1977 struct btrfs_block_group_item, chunk_objectid, 64);
1979 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1980 struct btrfs_block_group_item, chunk_objectid, 64);
1981 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1982 struct btrfs_block_group_item, flags, 64);
1983 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1984 struct btrfs_block_group_item, flags, 64);
1986 /* struct btrfs_inode_ref */
1987 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1988 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1990 /* struct btrfs_inode_item */
1991 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1992 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1993 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1994 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1995 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1996 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1997 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1998 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1999 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2000 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2001 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2002 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2004 static inline struct btrfs_timespec *
2005 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2007 unsigned long ptr = (unsigned long)inode_item;
2008 ptr += offsetof(struct btrfs_inode_item, atime);
2009 return (struct btrfs_timespec *)ptr;
2012 static inline struct btrfs_timespec *
2013 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2015 unsigned long ptr = (unsigned long)inode_item;
2016 ptr += offsetof(struct btrfs_inode_item, mtime);
2017 return (struct btrfs_timespec *)ptr;
2020 static inline struct btrfs_timespec *
2021 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2023 unsigned long ptr = (unsigned long)inode_item;
2024 ptr += offsetof(struct btrfs_inode_item, ctime);
2025 return (struct btrfs_timespec *)ptr;
2028 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2029 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2031 /* struct btrfs_dev_extent */
2032 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2034 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2035 chunk_objectid, 64);
2036 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2038 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2040 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2042 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2043 return (u8 *)((unsigned long)dev + ptr);
2046 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2047 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2049 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2051 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2054 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2056 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2057 struct btrfs_tree_block_info *item,
2058 struct btrfs_disk_key *key)
2060 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2063 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2064 struct btrfs_tree_block_info *item,
2065 struct btrfs_disk_key *key)
2067 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2070 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2072 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2074 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2076 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2079 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2082 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2084 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2087 static inline u32 btrfs_extent_inline_ref_size(int type)
2089 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2090 type == BTRFS_SHARED_BLOCK_REF_KEY)
2091 return sizeof(struct btrfs_extent_inline_ref);
2092 if (type == BTRFS_SHARED_DATA_REF_KEY)
2093 return sizeof(struct btrfs_shared_data_ref) +
2094 sizeof(struct btrfs_extent_inline_ref);
2095 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2096 return sizeof(struct btrfs_extent_data_ref) +
2097 offsetof(struct btrfs_extent_inline_ref, offset);
2102 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2103 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2105 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2106 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2108 /* struct btrfs_node */
2109 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2110 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2112 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2115 ptr = offsetof(struct btrfs_node, ptrs) +
2116 sizeof(struct btrfs_key_ptr) * nr;
2117 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2120 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2124 ptr = offsetof(struct btrfs_node, ptrs) +
2125 sizeof(struct btrfs_key_ptr) * nr;
2126 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2129 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2132 ptr = offsetof(struct btrfs_node, ptrs) +
2133 sizeof(struct btrfs_key_ptr) * nr;
2134 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2137 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2141 ptr = offsetof(struct btrfs_node, ptrs) +
2142 sizeof(struct btrfs_key_ptr) * nr;
2143 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2146 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2148 return offsetof(struct btrfs_node, ptrs) +
2149 sizeof(struct btrfs_key_ptr) * nr;
2152 void btrfs_node_key(struct extent_buffer *eb,
2153 struct btrfs_disk_key *disk_key, int nr);
2155 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2156 struct btrfs_disk_key *disk_key, int nr)
2159 ptr = btrfs_node_key_ptr_offset(nr);
2160 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2161 struct btrfs_key_ptr, key, disk_key);
2164 /* struct btrfs_item */
2165 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2166 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2168 static inline unsigned long btrfs_item_nr_offset(int nr)
2170 return offsetof(struct btrfs_leaf, items) +
2171 sizeof(struct btrfs_item) * nr;
2174 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2177 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2180 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2181 struct btrfs_item *item)
2183 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2186 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2188 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2191 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2193 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2196 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2198 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2201 static inline void btrfs_item_key(struct extent_buffer *eb,
2202 struct btrfs_disk_key *disk_key, int nr)
2204 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2205 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2208 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2209 struct btrfs_disk_key *disk_key, int nr)
2211 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2212 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2215 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2218 * struct btrfs_root_ref
2220 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2221 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2222 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2224 /* struct btrfs_dir_item */
2225 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2226 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2227 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2228 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2230 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2231 struct btrfs_dir_item *item,
2232 struct btrfs_disk_key *key)
2234 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2237 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2238 struct btrfs_dir_item *item,
2239 struct btrfs_disk_key *key)
2241 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2244 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2246 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2248 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2251 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2252 struct btrfs_free_space_header *h,
2253 struct btrfs_disk_key *key)
2255 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2258 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2259 struct btrfs_free_space_header *h,
2260 struct btrfs_disk_key *key)
2262 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2265 /* struct btrfs_disk_key */
2266 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2268 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2269 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2271 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2272 struct btrfs_disk_key *disk)
2274 cpu->offset = le64_to_cpu(disk->offset);
2275 cpu->type = disk->type;
2276 cpu->objectid = le64_to_cpu(disk->objectid);
2279 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2280 struct btrfs_key *cpu)
2282 disk->offset = cpu_to_le64(cpu->offset);
2283 disk->type = cpu->type;
2284 disk->objectid = cpu_to_le64(cpu->objectid);
2287 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2288 struct btrfs_key *key, int nr)
2290 struct btrfs_disk_key disk_key;
2291 btrfs_node_key(eb, &disk_key, nr);
2292 btrfs_disk_key_to_cpu(key, &disk_key);
2295 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2296 struct btrfs_key *key, int nr)
2298 struct btrfs_disk_key disk_key;
2299 btrfs_item_key(eb, &disk_key, nr);
2300 btrfs_disk_key_to_cpu(key, &disk_key);
2303 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2304 struct btrfs_dir_item *item,
2305 struct btrfs_key *key)
2307 struct btrfs_disk_key disk_key;
2308 btrfs_dir_item_key(eb, item, &disk_key);
2309 btrfs_disk_key_to_cpu(key, &disk_key);
2313 static inline u8 btrfs_key_type(struct btrfs_key *key)
2318 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2323 /* struct btrfs_header */
2324 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2325 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2327 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2328 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2329 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2330 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2332 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2334 return (btrfs_header_flags(eb) & flag) == flag;
2337 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2339 u64 flags = btrfs_header_flags(eb);
2340 btrfs_set_header_flags(eb, flags | flag);
2341 return (flags & flag) == flag;
2344 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2346 u64 flags = btrfs_header_flags(eb);
2347 btrfs_set_header_flags(eb, flags & ~flag);
2348 return (flags & flag) == flag;
2351 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2353 u64 flags = btrfs_header_flags(eb);
2354 return flags >> BTRFS_BACKREF_REV_SHIFT;
2357 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2360 u64 flags = btrfs_header_flags(eb);
2361 flags &= ~BTRFS_BACKREF_REV_MASK;
2362 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2363 btrfs_set_header_flags(eb, flags);
2366 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2368 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2372 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2374 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2378 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2380 return btrfs_header_level(eb) == 0;
2383 /* struct btrfs_root_item */
2384 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2386 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2387 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2388 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2390 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2392 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2393 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2394 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2395 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2396 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2397 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2398 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2399 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2401 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2403 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2405 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2407 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2409 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2412 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2414 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2417 /* struct btrfs_root_backup */
2418 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2420 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2422 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2423 tree_root_level, 8);
2425 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2427 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2428 chunk_root_gen, 64);
2429 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2430 chunk_root_level, 8);
2432 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2434 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2435 extent_root_gen, 64);
2436 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2437 extent_root_level, 8);
2439 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2441 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2443 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2446 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2448 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2450 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2453 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2455 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2457 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2458 csum_root_level, 8);
2459 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2461 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2463 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2466 /* struct btrfs_balance_item */
2467 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2469 static inline void btrfs_balance_data(struct extent_buffer *eb,
2470 struct btrfs_balance_item *bi,
2471 struct btrfs_disk_balance_args *ba)
2473 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2476 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2477 struct btrfs_balance_item *bi,
2478 struct btrfs_disk_balance_args *ba)
2480 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2483 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2484 struct btrfs_balance_item *bi,
2485 struct btrfs_disk_balance_args *ba)
2487 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2490 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2491 struct btrfs_balance_item *bi,
2492 struct btrfs_disk_balance_args *ba)
2494 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2497 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2498 struct btrfs_balance_item *bi,
2499 struct btrfs_disk_balance_args *ba)
2501 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2504 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2505 struct btrfs_balance_item *bi,
2506 struct btrfs_disk_balance_args *ba)
2508 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2512 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2513 struct btrfs_disk_balance_args *disk)
2515 memset(cpu, 0, sizeof(*cpu));
2517 cpu->profiles = le64_to_cpu(disk->profiles);
2518 cpu->usage = le64_to_cpu(disk->usage);
2519 cpu->devid = le64_to_cpu(disk->devid);
2520 cpu->pstart = le64_to_cpu(disk->pstart);
2521 cpu->pend = le64_to_cpu(disk->pend);
2522 cpu->vstart = le64_to_cpu(disk->vstart);
2523 cpu->vend = le64_to_cpu(disk->vend);
2524 cpu->target = le64_to_cpu(disk->target);
2525 cpu->flags = le64_to_cpu(disk->flags);
2529 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2530 struct btrfs_balance_args *cpu)
2532 memset(disk, 0, sizeof(*disk));
2534 disk->profiles = cpu_to_le64(cpu->profiles);
2535 disk->usage = cpu_to_le64(cpu->usage);
2536 disk->devid = cpu_to_le64(cpu->devid);
2537 disk->pstart = cpu_to_le64(cpu->pstart);
2538 disk->pend = cpu_to_le64(cpu->pend);
2539 disk->vstart = cpu_to_le64(cpu->vstart);
2540 disk->vend = cpu_to_le64(cpu->vend);
2541 disk->target = cpu_to_le64(cpu->target);
2542 disk->flags = cpu_to_le64(cpu->flags);
2545 /* struct btrfs_super_block */
2546 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2547 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2548 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2550 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2551 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2552 struct btrfs_super_block, sys_chunk_array_size, 32);
2553 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2554 struct btrfs_super_block, chunk_root_generation, 64);
2555 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2557 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2559 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2560 chunk_root_level, 8);
2561 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2563 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2564 log_root_transid, 64);
2565 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2567 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2569 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2571 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2573 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2575 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2577 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2579 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2580 root_dir_objectid, 64);
2581 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2583 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2585 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2586 compat_ro_flags, 64);
2587 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2588 incompat_flags, 64);
2589 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2591 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2592 cache_generation, 64);
2594 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2596 int t = btrfs_super_csum_type(s);
2597 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2598 return btrfs_csum_sizes[t];
2601 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2603 return offsetof(struct btrfs_leaf, items);
2606 /* struct btrfs_file_extent_item */
2607 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2609 static inline unsigned long
2610 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2612 unsigned long offset = (unsigned long)e;
2613 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2617 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2619 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2622 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2624 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2626 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2627 disk_num_bytes, 64);
2628 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2630 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2632 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2634 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2636 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2638 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2639 other_encoding, 16);
2641 /* this returns the number of file bytes represented by the inline item.
2642 * If an item is compressed, this is the uncompressed size
2644 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2645 struct btrfs_file_extent_item *e)
2647 return btrfs_file_extent_ram_bytes(eb, e);
2651 * this returns the number of bytes used by the item on disk, minus the
2652 * size of any extent headers. If a file is compressed on disk, this is
2653 * the compressed size
2655 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2656 struct btrfs_item *e)
2658 unsigned long offset;
2659 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2660 return btrfs_item_size(eb, e) - offset;
2663 /* btrfs_dev_stats_item */
2664 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2665 struct btrfs_dev_stats_item *ptr,
2670 read_extent_buffer(eb, &val,
2671 offsetof(struct btrfs_dev_stats_item, values) +
2672 ((unsigned long)ptr) + (index * sizeof(u64)),
2677 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2678 struct btrfs_dev_stats_item *ptr,
2681 write_extent_buffer(eb, &val,
2682 offsetof(struct btrfs_dev_stats_item, values) +
2683 ((unsigned long)ptr) + (index * sizeof(u64)),
2687 /* btrfs_qgroup_status_item */
2688 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2690 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2692 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2694 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2697 /* btrfs_qgroup_info_item */
2698 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2700 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2701 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2703 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2704 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2707 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2708 struct btrfs_qgroup_info_item, generation, 64);
2709 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2711 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2712 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2713 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2715 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2716 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2718 /* btrfs_qgroup_limit_item */
2719 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2721 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2723 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2725 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2727 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2730 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2732 return sb->s_fs_info;
2735 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2738 return root->leafsize;
2739 return root->nodesize;
2742 /* helper function to cast into the data area of the leaf. */
2743 #define btrfs_item_ptr(leaf, slot, type) \
2744 ((type *)(btrfs_leaf_data(leaf) + \
2745 btrfs_item_offset_nr(leaf, slot)))
2747 #define btrfs_item_ptr_offset(leaf, slot) \
2748 ((unsigned long)(btrfs_leaf_data(leaf) + \
2749 btrfs_item_offset_nr(leaf, slot)))
2751 static inline struct dentry *fdentry(struct file *file)
2753 return file->f_path.dentry;
2756 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2758 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2759 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2762 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2764 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2768 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2771 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2776 * Doing a truncate won't result in new nodes or leaves, just what we need for
2779 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2782 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2786 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2787 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2788 struct btrfs_root *root, unsigned long count);
2789 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2790 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2791 struct btrfs_root *root, u64 bytenr,
2792 u64 num_bytes, u64 *refs, u64 *flags);
2793 int btrfs_pin_extent(struct btrfs_root *root,
2794 u64 bytenr, u64 num, int reserved);
2795 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2796 struct btrfs_root *root,
2797 u64 bytenr, u64 num_bytes);
2798 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2799 struct btrfs_root *root,
2800 u64 objectid, u64 offset, u64 bytenr);
2801 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2802 struct btrfs_fs_info *info,
2804 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2805 u64 btrfs_find_block_group(struct btrfs_root *root,
2806 u64 search_start, u64 search_hint, int owner);
2807 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2808 struct btrfs_root *root, u32 blocksize,
2809 u64 parent, u64 root_objectid,
2810 struct btrfs_disk_key *key, int level,
2811 u64 hint, u64 empty_size);
2812 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root,
2814 struct extent_buffer *buf,
2815 u64 parent, int last_ref);
2816 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2817 struct btrfs_root *root,
2818 u64 bytenr, u32 blocksize,
2820 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2821 struct btrfs_root *root,
2822 u64 root_objectid, u64 owner,
2823 u64 offset, struct btrfs_key *ins);
2824 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2825 struct btrfs_root *root,
2826 u64 root_objectid, u64 owner, u64 offset,
2827 struct btrfs_key *ins);
2828 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2829 struct btrfs_root *root,
2830 u64 num_bytes, u64 min_alloc_size,
2831 u64 empty_size, u64 hint_byte,
2832 struct btrfs_key *ins, u64 data);
2833 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2834 struct extent_buffer *buf, int full_backref, int for_cow);
2835 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2836 struct extent_buffer *buf, int full_backref, int for_cow);
2837 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2838 struct btrfs_root *root,
2839 u64 bytenr, u64 num_bytes, u64 flags,
2841 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2842 struct btrfs_root *root,
2843 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2844 u64 owner, u64 offset, int for_cow);
2846 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2847 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2848 u64 start, u64 len);
2849 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2850 struct btrfs_root *root);
2851 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2852 struct btrfs_root *root);
2853 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2854 struct btrfs_root *root,
2855 u64 bytenr, u64 num_bytes, u64 parent,
2856 u64 root_objectid, u64 owner, u64 offset, int for_cow);
2858 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2859 struct btrfs_root *root);
2860 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2861 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2862 int btrfs_read_block_groups(struct btrfs_root *root);
2863 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2864 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2865 struct btrfs_root *root, u64 bytes_used,
2866 u64 type, u64 chunk_objectid, u64 chunk_offset,
2868 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2869 struct btrfs_root *root, u64 group_start);
2870 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root);
2872 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2873 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2874 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2875 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2876 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2877 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2878 struct btrfs_root *root);
2879 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2880 struct inode *inode);
2881 void btrfs_orphan_release_metadata(struct inode *inode);
2882 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2883 struct btrfs_pending_snapshot *pending);
2884 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2885 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2886 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2887 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2888 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2889 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
2890 unsigned short type);
2891 void btrfs_free_block_rsv(struct btrfs_root *root,
2892 struct btrfs_block_rsv *rsv);
2893 int btrfs_block_rsv_add(struct btrfs_root *root,
2894 struct btrfs_block_rsv *block_rsv,
2896 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2897 struct btrfs_block_rsv *block_rsv,
2899 int btrfs_block_rsv_check(struct btrfs_root *root,
2900 struct btrfs_block_rsv *block_rsv, int min_factor);
2901 int btrfs_block_rsv_refill(struct btrfs_root *root,
2902 struct btrfs_block_rsv *block_rsv,
2904 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2905 struct btrfs_block_rsv *block_rsv,
2907 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2908 struct btrfs_block_rsv *dst_rsv,
2910 void btrfs_block_rsv_release(struct btrfs_root *root,
2911 struct btrfs_block_rsv *block_rsv,
2913 int btrfs_set_block_group_ro(struct btrfs_root *root,
2914 struct btrfs_block_group_cache *cache);
2915 void btrfs_set_block_group_rw(struct btrfs_root *root,
2916 struct btrfs_block_group_cache *cache);
2917 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2918 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2919 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2920 u64 start, u64 end);
2921 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2922 u64 num_bytes, u64 *actual_bytes);
2923 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2924 struct btrfs_root *root, u64 type);
2925 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2927 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2928 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2929 struct btrfs_fs_info *fs_info);
2931 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2932 int level, int *slot);
2933 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2934 int btrfs_previous_item(struct btrfs_root *root,
2935 struct btrfs_path *path, u64 min_objectid,
2937 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2938 struct btrfs_root *root, struct btrfs_path *path,
2939 struct btrfs_key *new_key);
2940 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2941 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2942 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2943 struct btrfs_key *key, int lowest_level,
2944 int cache_only, u64 min_trans);
2945 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2946 struct btrfs_key *max_key,
2947 struct btrfs_path *path, int cache_only,
2949 enum btrfs_compare_tree_result {
2950 BTRFS_COMPARE_TREE_NEW,
2951 BTRFS_COMPARE_TREE_DELETED,
2952 BTRFS_COMPARE_TREE_CHANGED,
2954 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
2955 struct btrfs_root *right_root,
2956 struct btrfs_path *left_path,
2957 struct btrfs_path *right_path,
2958 struct btrfs_key *key,
2959 enum btrfs_compare_tree_result result,
2961 int btrfs_compare_trees(struct btrfs_root *left_root,
2962 struct btrfs_root *right_root,
2963 btrfs_changed_cb_t cb, void *ctx);
2964 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *root, struct extent_buffer *buf,
2966 struct extent_buffer *parent, int parent_slot,
2967 struct extent_buffer **cow_ret);
2968 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2969 struct btrfs_root *root,
2970 struct extent_buffer *buf,
2971 struct extent_buffer **cow_ret, u64 new_root_objectid);
2972 int btrfs_block_can_be_shared(struct btrfs_root *root,
2973 struct extent_buffer *buf);
2974 void btrfs_extend_item(struct btrfs_trans_handle *trans,
2975 struct btrfs_root *root, struct btrfs_path *path,
2977 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
2978 struct btrfs_root *root,
2979 struct btrfs_path *path,
2980 u32 new_size, int from_end);
2981 int btrfs_split_item(struct btrfs_trans_handle *trans,
2982 struct btrfs_root *root,
2983 struct btrfs_path *path,
2984 struct btrfs_key *new_key,
2985 unsigned long split_offset);
2986 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2987 struct btrfs_root *root,
2988 struct btrfs_path *path,
2989 struct btrfs_key *new_key);
2990 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2991 *root, struct btrfs_key *key, struct btrfs_path *p, int
2993 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
2994 struct btrfs_path *p, u64 time_seq);
2995 int btrfs_search_slot_for_read(struct btrfs_root *root,
2996 struct btrfs_key *key, struct btrfs_path *p,
2997 int find_higher, int return_any);
2998 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2999 struct btrfs_root *root, struct extent_buffer *parent,
3000 int start_slot, int cache_only, u64 *last_ret,
3001 struct btrfs_key *progress);
3002 void btrfs_release_path(struct btrfs_path *p);
3003 struct btrfs_path *btrfs_alloc_path(void);
3004 void btrfs_free_path(struct btrfs_path *p);
3005 void btrfs_set_path_blocking(struct btrfs_path *p);
3006 void btrfs_clear_path_blocking(struct btrfs_path *p,
3007 struct extent_buffer *held, int held_rw);
3008 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3010 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3011 struct btrfs_path *path, int slot, int nr);
3012 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3013 struct btrfs_root *root,
3014 struct btrfs_path *path)
3016 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3019 void setup_items_for_insert(struct btrfs_trans_handle *trans,
3020 struct btrfs_root *root, struct btrfs_path *path,
3021 struct btrfs_key *cpu_key, u32 *data_size,
3022 u32 total_data, u32 total_size, int nr);
3023 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3024 *root, struct btrfs_key *key, void *data, u32 data_size);
3025 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root,
3027 struct btrfs_path *path,
3028 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3030 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3031 struct btrfs_root *root,
3032 struct btrfs_path *path,
3033 struct btrfs_key *key,
3036 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3039 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3040 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3042 static inline int btrfs_next_old_item(struct btrfs_root *root,
3043 struct btrfs_path *p, u64 time_seq)
3046 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3047 return btrfs_next_old_leaf(root, p, time_seq);
3050 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3052 return btrfs_next_old_item(root, p, 0);
3054 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3055 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3056 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3057 struct btrfs_block_rsv *block_rsv,
3058 int update_ref, int for_reloc);
3059 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3060 struct btrfs_root *root,
3061 struct extent_buffer *node,
3062 struct extent_buffer *parent);
3063 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3066 * Get synced with close_ctree()
3069 return fs_info->closing;
3071 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3073 kfree(fs_info->balance_ctl);
3074 kfree(fs_info->delayed_root);
3075 kfree(fs_info->extent_root);
3076 kfree(fs_info->tree_root);
3077 kfree(fs_info->chunk_root);
3078 kfree(fs_info->dev_root);
3079 kfree(fs_info->csum_root);
3080 kfree(fs_info->quota_root);
3081 kfree(fs_info->super_copy);
3082 kfree(fs_info->super_for_commit);
3086 /* tree mod log functions from ctree.c */
3087 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3088 struct seq_list *elem);
3089 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3090 struct seq_list *elem);
3091 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
3093 return atomic_inc_return(&fs_info->tree_mod_seq);
3097 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3098 struct btrfs_path *path,
3099 u64 root_id, u64 ref_id);
3100 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3101 struct btrfs_root *tree_root,
3102 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3103 const char *name, int name_len);
3104 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3105 struct btrfs_root *tree_root,
3106 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3107 const char *name, int name_len);
3108 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3109 struct btrfs_key *key);
3110 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3111 *root, struct btrfs_key *key, struct btrfs_root_item
3113 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root,
3115 struct btrfs_key *key,
3116 struct btrfs_root_item *item);
3117 void btrfs_read_root_item(struct btrfs_root *root,
3118 struct extent_buffer *eb, int slot,
3119 struct btrfs_root_item *item);
3120 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3121 btrfs_root_item *item, struct btrfs_key *key);
3122 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3123 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3124 void btrfs_set_root_node(struct btrfs_root_item *item,
3125 struct extent_buffer *node);
3126 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3127 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *root);
3131 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *root, const char *name,
3133 int name_len, struct inode *dir,
3134 struct btrfs_key *location, u8 type, u64 index);
3135 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3136 struct btrfs_root *root,
3137 struct btrfs_path *path, u64 dir,
3138 const char *name, int name_len,
3140 struct btrfs_dir_item *
3141 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3142 struct btrfs_root *root,
3143 struct btrfs_path *path, u64 dir,
3144 u64 objectid, const char *name, int name_len,
3146 struct btrfs_dir_item *
3147 btrfs_search_dir_index_item(struct btrfs_root *root,
3148 struct btrfs_path *path, u64 dirid,
3149 const char *name, int name_len);
3150 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3151 struct btrfs_path *path,
3152 const char *name, int name_len);
3153 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3154 struct btrfs_root *root,
3155 struct btrfs_path *path,
3156 struct btrfs_dir_item *di);
3157 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3158 struct btrfs_root *root,
3159 struct btrfs_path *path, u64 objectid,
3160 const char *name, u16 name_len,
3161 const void *data, u16 data_len);
3162 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_path *path, u64 dir,
3165 const char *name, u16 name_len,
3167 int verify_dir_item(struct btrfs_root *root,
3168 struct extent_buffer *leaf,
3169 struct btrfs_dir_item *dir_item);
3172 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3173 struct btrfs_root *root, u64 offset);
3174 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3175 struct btrfs_root *root, u64 offset);
3176 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3179 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3180 struct btrfs_root *root,
3181 const char *name, int name_len,
3182 u64 inode_objectid, u64 ref_objectid, u64 index);
3183 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3184 struct btrfs_root *root,
3185 const char *name, int name_len,
3186 u64 inode_objectid, u64 ref_objectid, u64 *index);
3187 struct btrfs_inode_ref *
3188 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
3189 struct btrfs_root *root,
3190 struct btrfs_path *path,
3191 const char *name, int name_len,
3192 u64 inode_objectid, u64 ref_objectid, int mod);
3193 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3194 struct btrfs_root *root,
3195 struct btrfs_path *path, u64 objectid);
3196 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3197 *root, struct btrfs_path *path,
3198 struct btrfs_key *location, int mod);
3201 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root, u64 bytenr, u64 len);
3203 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3204 struct bio *bio, u32 *dst);
3205 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3206 struct bio *bio, u64 logical_offset);
3207 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3208 struct btrfs_root *root,
3209 u64 objectid, u64 pos,
3210 u64 disk_offset, u64 disk_num_bytes,
3211 u64 num_bytes, u64 offset, u64 ram_bytes,
3212 u8 compression, u8 encryption, u16 other_encoding);
3213 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3214 struct btrfs_root *root,
3215 struct btrfs_path *path, u64 objectid,
3216 u64 bytenr, int mod);
3217 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3218 struct btrfs_root *root,
3219 struct btrfs_ordered_sum *sums);
3220 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3221 struct bio *bio, u64 file_start, int contig);
3222 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3223 struct btrfs_root *root,
3224 struct btrfs_path *path,
3225 u64 bytenr, int cow);
3226 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3227 struct btrfs_root *root, struct btrfs_path *path,
3229 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3230 struct list_head *list, int search_commit);
3232 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3233 size_t pg_offset, u64 start, u64 len,
3236 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3237 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3238 #define ClearPageChecked ClearPageFsMisc
3239 #define SetPageChecked SetPageFsMisc
3240 #define PageChecked PageFsMisc
3243 /* This forces readahead on a given range of bytes in an inode */
3244 static inline void btrfs_force_ra(struct address_space *mapping,
3245 struct file_ra_state *ra, struct file *file,
3246 pgoff_t offset, unsigned long req_size)
3248 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3251 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3252 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3253 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3254 struct btrfs_root *root,
3255 struct inode *dir, struct inode *inode,
3256 const char *name, int name_len);
3257 int btrfs_add_link(struct btrfs_trans_handle *trans,
3258 struct inode *parent_inode, struct inode *inode,
3259 const char *name, int name_len, int add_backref, u64 index);
3260 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3261 struct btrfs_root *root,
3262 struct inode *dir, u64 objectid,
3263 const char *name, int name_len);
3264 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3266 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3267 struct btrfs_root *root,
3268 struct inode *inode, u64 new_size,
3271 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3272 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3273 struct extent_state **cached_state);
3274 int btrfs_writepages(struct address_space *mapping,
3275 struct writeback_control *wbc);
3276 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3277 struct btrfs_root *new_root, u64 new_dirid);
3278 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3279 size_t size, struct bio *bio, unsigned long bio_flags);
3281 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3282 int btrfs_readpage(struct file *file, struct page *page);
3283 void btrfs_evict_inode(struct inode *inode);
3284 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3285 int btrfs_dirty_inode(struct inode *inode);
3286 struct inode *btrfs_alloc_inode(struct super_block *sb);
3287 void btrfs_destroy_inode(struct inode *inode);
3288 int btrfs_drop_inode(struct inode *inode);
3289 int btrfs_init_cachep(void);
3290 void btrfs_destroy_cachep(void);
3291 long btrfs_ioctl_trans_end(struct file *file);
3292 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3293 struct btrfs_root *root, int *was_new);
3294 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3295 size_t pg_offset, u64 start, u64 end,
3297 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3298 struct btrfs_root *root,
3299 struct inode *inode);
3300 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3301 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3302 int btrfs_orphan_cleanup(struct btrfs_root *root);
3303 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3304 struct btrfs_root *root);
3305 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3306 void btrfs_invalidate_inodes(struct btrfs_root *root);
3307 void btrfs_add_delayed_iput(struct inode *inode);
3308 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3309 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3310 u64 start, u64 num_bytes, u64 min_size,
3311 loff_t actual_len, u64 *alloc_hint);
3312 int btrfs_prealloc_file_range_trans(struct inode *inode,
3313 struct btrfs_trans_handle *trans, int mode,
3314 u64 start, u64 num_bytes, u64 min_size,
3315 loff_t actual_len, u64 *alloc_hint);
3316 extern const struct dentry_operations btrfs_dentry_operations;
3319 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3320 void btrfs_update_iflags(struct inode *inode);
3321 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3322 int btrfs_defrag_file(struct inode *inode, struct file *file,
3323 struct btrfs_ioctl_defrag_range_args *range,
3324 u64 newer_than, unsigned long max_pages);
3326 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3327 struct inode *inode);
3328 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3329 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3330 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3332 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3333 u64 start, u64 end, int skip_pinned,
3335 extern const struct file_operations btrfs_file_operations;
3336 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3337 struct btrfs_root *root, struct inode *inode,
3338 struct btrfs_path *path, u64 start, u64 end,
3339 u64 *drop_end, int drop_cache);
3340 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3341 struct btrfs_root *root, struct inode *inode, u64 start,
3342 u64 end, int drop_cache);
3343 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3344 struct inode *inode, u64 start, u64 end);
3345 int btrfs_release_file(struct inode *inode, struct file *file);
3346 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3347 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3348 struct page **pages, size_t num_pages,
3349 loff_t pos, size_t write_bytes,
3350 struct extent_state **cached);
3353 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3354 struct btrfs_root *root, int cache_only);
3357 int btrfs_init_sysfs(void);
3358 void btrfs_exit_sysfs(void);
3361 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3364 int btrfs_parse_options(struct btrfs_root *root, char *options);
3365 int btrfs_sync_fs(struct super_block *sb, int wait);
3367 #ifdef CONFIG_PRINTK
3369 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3371 static inline __printf(2, 3)
3372 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
3378 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3379 unsigned int line, int errno, const char *fmt, ...);
3382 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3383 struct btrfs_root *root, const char *function,
3384 unsigned int line, int errno);
3386 #define btrfs_set_fs_incompat(__fs_info, opt) \
3387 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3389 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3392 struct btrfs_super_block *disk_super;
3395 disk_super = fs_info->super_copy;
3396 features = btrfs_super_incompat_flags(disk_super);
3397 if (!(features & flag)) {
3399 btrfs_set_super_incompat_flags(disk_super, features);
3403 #define btrfs_abort_transaction(trans, root, errno) \
3405 __btrfs_abort_transaction(trans, root, __func__, \
3409 #define btrfs_std_error(fs_info, errno) \
3412 __btrfs_std_error((fs_info), __func__, \
3413 __LINE__, (errno), NULL); \
3416 #define btrfs_error(fs_info, errno, fmt, args...) \
3418 __btrfs_std_error((fs_info), __func__, __LINE__, \
3419 (errno), fmt, ##args); \
3423 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3424 unsigned int line, int errno, const char *fmt, ...);
3426 #define btrfs_panic(fs_info, errno, fmt, args...) \
3428 struct btrfs_fs_info *_i = (fs_info); \
3429 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3430 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3434 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3435 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3436 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3437 struct inode *inode, struct inode *dir);
3438 int btrfs_acl_chmod(struct inode *inode);
3440 #define btrfs_get_acl NULL
3441 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3442 struct inode *inode, struct inode *dir)
3446 static inline int btrfs_acl_chmod(struct inode *inode)
3453 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3454 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3455 struct btrfs_root *root);
3456 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3457 struct btrfs_root *root);
3458 int btrfs_recover_relocation(struct btrfs_root *root);
3459 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3460 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3461 struct btrfs_root *root, struct extent_buffer *buf,
3462 struct extent_buffer *cow);
3463 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3464 struct btrfs_pending_snapshot *pending,
3465 u64 *bytes_to_reserve);
3466 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3467 struct btrfs_pending_snapshot *pending);
3470 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
3471 struct btrfs_scrub_progress *progress, int readonly);
3472 void btrfs_scrub_pause(struct btrfs_root *root);
3473 void btrfs_scrub_pause_super(struct btrfs_root *root);
3474 void btrfs_scrub_continue(struct btrfs_root *root);
3475 void btrfs_scrub_continue_super(struct btrfs_root *root);
3476 int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
3477 int btrfs_scrub_cancel(struct btrfs_root *root);
3478 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3479 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3480 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3481 struct btrfs_scrub_progress *progress);
3484 struct reada_control {
3485 struct btrfs_root *root; /* tree to prefetch */
3486 struct btrfs_key key_start;
3487 struct btrfs_key key_end; /* exclusive */
3490 wait_queue_head_t wait;
3492 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3493 struct btrfs_key *start, struct btrfs_key *end);
3494 int btrfs_reada_wait(void *handle);
3495 void btrfs_reada_detach(void *handle);
3496 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3497 u64 start, int err);
3500 struct qgroup_update {
3501 struct list_head list;
3502 struct btrfs_delayed_ref_node *node;
3503 struct btrfs_delayed_extent_op *extent_op;
3506 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3507 struct btrfs_fs_info *fs_info);
3508 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3509 struct btrfs_fs_info *fs_info);
3510 int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
3511 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3512 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3513 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3514 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3515 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3516 struct btrfs_fs_info *fs_info, u64 qgroupid,
3518 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3519 struct btrfs_fs_info *fs_info, u64 qgroupid);
3520 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3521 struct btrfs_fs_info *fs_info, u64 qgroupid,
3522 struct btrfs_qgroup_limit *limit);
3523 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3524 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3525 struct btrfs_delayed_extent_op;
3526 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3527 struct btrfs_delayed_ref_node *node,
3528 struct btrfs_delayed_extent_op *extent_op);
3529 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3530 struct btrfs_fs_info *fs_info,
3531 struct btrfs_delayed_ref_node *node,
3532 struct btrfs_delayed_extent_op *extent_op);
3533 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3534 struct btrfs_fs_info *fs_info);
3535 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3536 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3537 struct btrfs_qgroup_inherit *inherit);
3538 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3539 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3541 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3543 static inline int is_fstree(u64 rootid)
3545 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3546 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)