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 /* orhpan objectid for tracking unlinked/truncated files */
95 #define BTRFS_ORPHAN_OBJECTID -5ULL
97 /* does write ahead logging to speed up fsyncs */
98 #define BTRFS_TREE_LOG_OBJECTID -6ULL
99 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
101 /* for space balancing */
102 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
103 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
106 * extent checksums all have this objectid
107 * this allows them to share the logging tree
110 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
112 /* For storing free space cache */
113 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
116 * The inode number assigned to the special inode for sotring
119 #define BTRFS_FREE_INO_OBJECTID -12ULL
121 /* dummy objectid represents multiple objectids */
122 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
125 * All files have objectids in this range.
127 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
128 #define BTRFS_LAST_FREE_OBJECTID -256ULL
129 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
133 * the device items go into the chunk tree. The key is in the form
134 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
136 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
138 #define BTRFS_BTREE_INODE_OBJECTID 1
140 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
143 * the max metadata block size. This limit is somewhat artificial,
144 * but the memmove costs go through the roof for larger blocks.
146 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
149 * we can actually store much bigger names, but lets not confuse the rest
152 #define BTRFS_NAME_LEN 255
154 /* 32 bytes in various csum fields */
155 #define BTRFS_CSUM_SIZE 32
158 #define BTRFS_CSUM_TYPE_CRC32 0
160 static int btrfs_csum_sizes[] = { 4, 0 };
162 /* four bytes for CRC32 */
163 #define BTRFS_EMPTY_DIR_SIZE 0
165 #define BTRFS_FT_UNKNOWN 0
166 #define BTRFS_FT_REG_FILE 1
167 #define BTRFS_FT_DIR 2
168 #define BTRFS_FT_CHRDEV 3
169 #define BTRFS_FT_BLKDEV 4
170 #define BTRFS_FT_FIFO 5
171 #define BTRFS_FT_SOCK 6
172 #define BTRFS_FT_SYMLINK 7
173 #define BTRFS_FT_XATTR 8
174 #define BTRFS_FT_MAX 9
176 /* ioprio of readahead is set to idle */
177 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
180 * The key defines the order in the tree, and so it also defines (optimal)
183 * objectid corresponds to the inode number.
185 * type tells us things about the object, and is a kind of stream selector.
186 * so for a given inode, keys with type of 1 might refer to the inode data,
187 * type of 2 may point to file data in the btree and type == 3 may point to
190 * offset is the starting byte offset for this key in the stream.
192 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
193 * in cpu native order. Otherwise they are identical and their sizes
194 * should be the same (ie both packed)
196 struct btrfs_disk_key {
200 } __attribute__ ((__packed__));
206 } __attribute__ ((__packed__));
208 struct btrfs_mapping_tree {
209 struct extent_map_tree map_tree;
212 struct btrfs_dev_item {
213 /* the internal btrfs device id */
216 /* size of the device */
222 /* optimal io alignment for this device */
225 /* optimal io width for this device */
228 /* minimal io size for this device */
231 /* type and info about this device */
234 /* expected generation for this device */
238 * starting byte of this partition on the device,
239 * to allow for stripe alignment in the future
243 /* grouping information for allocation decisions */
246 /* seek speed 0-100 where 100 is fastest */
249 /* bandwidth 0-100 where 100 is fastest */
252 /* btrfs generated uuid for this device */
253 u8 uuid[BTRFS_UUID_SIZE];
255 /* uuid of FS who owns this device */
256 u8 fsid[BTRFS_UUID_SIZE];
257 } __attribute__ ((__packed__));
259 struct btrfs_stripe {
262 u8 dev_uuid[BTRFS_UUID_SIZE];
263 } __attribute__ ((__packed__));
266 /* size of this chunk in bytes */
269 /* objectid of the root referencing this chunk */
275 /* optimal io alignment for this chunk */
278 /* optimal io width for this chunk */
281 /* minimal io size for this chunk */
284 /* 2^16 stripes is quite a lot, a second limit is the size of a single
289 /* sub stripes only matter for raid10 */
291 struct btrfs_stripe stripe;
292 /* additional stripes go here */
293 } __attribute__ ((__packed__));
295 #define BTRFS_FREE_SPACE_EXTENT 1
296 #define BTRFS_FREE_SPACE_BITMAP 2
298 struct btrfs_free_space_entry {
302 } __attribute__ ((__packed__));
304 struct btrfs_free_space_header {
305 struct btrfs_disk_key location;
309 } __attribute__ ((__packed__));
311 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
313 BUG_ON(num_stripes == 0);
314 return sizeof(struct btrfs_chunk) +
315 sizeof(struct btrfs_stripe) * (num_stripes - 1);
318 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
319 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
325 /* Errors detected */
326 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
328 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
329 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
331 #define BTRFS_BACKREF_REV_MAX 256
332 #define BTRFS_BACKREF_REV_SHIFT 56
333 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
334 BTRFS_BACKREF_REV_SHIFT)
336 #define BTRFS_OLD_BACKREF_REV 0
337 #define BTRFS_MIXED_BACKREF_REV 1
340 * every tree block (leaf or node) starts with this header.
342 struct btrfs_header {
343 /* these first four must match the super block */
344 u8 csum[BTRFS_CSUM_SIZE];
345 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
346 __le64 bytenr; /* which block this node is supposed to live in */
349 /* allowed to be different from the super from here on down */
350 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
355 } __attribute__ ((__packed__));
357 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
358 sizeof(struct btrfs_header)) / \
359 sizeof(struct btrfs_key_ptr))
360 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
361 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
362 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
363 sizeof(struct btrfs_item) - \
364 sizeof(struct btrfs_file_extent_item))
365 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
366 sizeof(struct btrfs_item) -\
367 sizeof(struct btrfs_dir_item))
371 * this is a very generous portion of the super block, giving us
372 * room to translate 14 chunks with 3 stripes each.
374 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
375 #define BTRFS_LABEL_SIZE 256
378 * just in case we somehow lose the roots and are not able to mount,
379 * we store an array of the roots from previous transactions
382 #define BTRFS_NUM_BACKUP_ROOTS 4
383 struct btrfs_root_backup {
385 __le64 tree_root_gen;
388 __le64 chunk_root_gen;
391 __le64 extent_root_gen;
400 __le64 csum_root_gen;
410 u8 extent_root_level;
414 /* future and to align */
416 } __attribute__ ((__packed__));
419 * the super block basically lists the main trees of the FS
420 * it currently lacks any block count etc etc
422 struct btrfs_super_block {
423 u8 csum[BTRFS_CSUM_SIZE];
424 /* the first 4 fields must match struct btrfs_header */
425 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
426 __le64 bytenr; /* this block number */
429 /* allowed to be different from the btrfs_header from here own down */
436 /* this will help find the new super based on the log root */
437 __le64 log_root_transid;
440 __le64 root_dir_objectid;
446 __le32 sys_chunk_array_size;
447 __le64 chunk_root_generation;
449 __le64 compat_ro_flags;
450 __le64 incompat_flags;
455 struct btrfs_dev_item dev_item;
457 char label[BTRFS_LABEL_SIZE];
459 __le64 cache_generation;
461 /* future expansion */
463 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
464 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
465 } __attribute__ ((__packed__));
468 * Compat flags that we support. If any incompat flags are set other than the
469 * ones specified below then we will fail to mount
471 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
472 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
473 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
474 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
476 * some patches floated around with a second compression method
477 * lets save that incompat here for when they do get in
478 * Note we don't actually support it, we're just reserving the
481 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
484 * older kernels tried to do bigger metadata blocks, but the
485 * code was pretty buggy. Lets not let them try anymore.
487 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
489 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
490 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
491 #define BTRFS_FEATURE_INCOMPAT_SUPP \
492 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
493 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
494 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
495 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
496 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
499 * A leaf is full of items. offset and size tell us where to find
500 * the item in the leaf (relative to the start of the data area)
503 struct btrfs_disk_key key;
506 } __attribute__ ((__packed__));
509 * leaves have an item area and a data area:
510 * [item0, item1....itemN] [free space] [dataN...data1, data0]
512 * The data is separate from the items to get the keys closer together
516 struct btrfs_header header;
517 struct btrfs_item items[];
518 } __attribute__ ((__packed__));
521 * all non-leaf blocks are nodes, they hold only keys and pointers to
524 struct btrfs_key_ptr {
525 struct btrfs_disk_key key;
528 } __attribute__ ((__packed__));
531 struct btrfs_header header;
532 struct btrfs_key_ptr ptrs[];
533 } __attribute__ ((__packed__));
536 * btrfs_paths remember the path taken from the root down to the leaf.
537 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
538 * to any other levels that are present.
540 * The slots array records the index of the item or block pointer
541 * used while walking the tree.
544 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
545 int slots[BTRFS_MAX_LEVEL];
546 /* if there is real range locking, this locks field will change */
547 int locks[BTRFS_MAX_LEVEL];
549 /* keep some upper locks as we walk down */
553 * set by btrfs_split_item, tells search_slot to keep all locks
554 * and to force calls to keep space in the nodes
556 unsigned int search_for_split:1;
557 unsigned int keep_locks:1;
558 unsigned int skip_locking:1;
559 unsigned int leave_spinning:1;
560 unsigned int search_commit_root:1;
564 * items in the extent btree are used to record the objectid of the
565 * owner of the block and the number of references
568 struct btrfs_extent_item {
572 } __attribute__ ((__packed__));
574 struct btrfs_extent_item_v0 {
576 } __attribute__ ((__packed__));
578 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
579 sizeof(struct btrfs_item))
581 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
582 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
584 /* following flags only apply to tree blocks */
586 /* use full backrefs for extent pointers in the block */
587 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
590 * this flag is only used internally by scrub and may be changed at any time
591 * it is only declared here to avoid collisions
593 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
595 struct btrfs_tree_block_info {
596 struct btrfs_disk_key key;
598 } __attribute__ ((__packed__));
600 struct btrfs_extent_data_ref {
605 } __attribute__ ((__packed__));
607 struct btrfs_shared_data_ref {
609 } __attribute__ ((__packed__));
611 struct btrfs_extent_inline_ref {
614 } __attribute__ ((__packed__));
616 /* old style backrefs item */
617 struct btrfs_extent_ref_v0 {
622 } __attribute__ ((__packed__));
625 /* dev extents record free space on individual devices. The owner
626 * field points back to the chunk allocation mapping tree that allocated
627 * the extent. The chunk tree uuid field is a way to double check the owner
629 struct btrfs_dev_extent {
631 __le64 chunk_objectid;
634 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
635 } __attribute__ ((__packed__));
637 struct btrfs_inode_ref {
641 } __attribute__ ((__packed__));
643 struct btrfs_timespec {
646 } __attribute__ ((__packed__));
648 enum btrfs_compression_type {
649 BTRFS_COMPRESS_NONE = 0,
650 BTRFS_COMPRESS_ZLIB = 1,
651 BTRFS_COMPRESS_LZO = 2,
652 BTRFS_COMPRESS_TYPES = 2,
653 BTRFS_COMPRESS_LAST = 3,
656 struct btrfs_inode_item {
657 /* nfs style generation number */
659 /* transid that last touched this inode */
671 /* modification sequence number for NFS */
675 * a little future expansion, for more than this we can
676 * just grow the inode item and version it
679 struct btrfs_timespec atime;
680 struct btrfs_timespec ctime;
681 struct btrfs_timespec mtime;
682 struct btrfs_timespec otime;
683 } __attribute__ ((__packed__));
685 struct btrfs_dir_log_item {
687 } __attribute__ ((__packed__));
689 struct btrfs_dir_item {
690 struct btrfs_disk_key location;
695 } __attribute__ ((__packed__));
697 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
699 struct btrfs_root_item {
700 struct btrfs_inode_item inode;
706 __le64 last_snapshot;
709 struct btrfs_disk_key drop_progress;
712 } __attribute__ ((__packed__));
715 * this is used for both forward and backward root refs
717 struct btrfs_root_ref {
721 } __attribute__ ((__packed__));
723 struct btrfs_disk_balance_args {
725 * profiles to operate on, single is denoted by
726 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
736 /* devid subset filter [pstart..pend) */
740 /* btrfs virtual address space subset filter [vstart..vend) */
745 * profile to convert to, single is denoted by
746 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
750 /* BTRFS_BALANCE_ARGS_* */
754 } __attribute__ ((__packed__));
757 * store balance parameters to disk so that balance can be properly
758 * resumed after crash or unmount
760 struct btrfs_balance_item {
761 /* BTRFS_BALANCE_* */
764 struct btrfs_disk_balance_args data;
765 struct btrfs_disk_balance_args meta;
766 struct btrfs_disk_balance_args sys;
769 } __attribute__ ((__packed__));
771 #define BTRFS_FILE_EXTENT_INLINE 0
772 #define BTRFS_FILE_EXTENT_REG 1
773 #define BTRFS_FILE_EXTENT_PREALLOC 2
775 struct btrfs_file_extent_item {
777 * transaction id that created this extent
781 * max number of bytes to hold this extent in ram
782 * when we split a compressed extent we can't know how big
783 * each of the resulting pieces will be. So, this is
784 * an upper limit on the size of the extent in ram instead of
790 * 32 bits for the various ways we might encode the data,
791 * including compression and encryption. If any of these
792 * are set to something a given disk format doesn't understand
793 * it is treated like an incompat flag for reading and writing,
798 __le16 other_encoding; /* spare for later use */
800 /* are we inline data or a real extent? */
804 * disk space consumed by the extent, checksum blocks are included
808 __le64 disk_num_bytes;
810 * the logical offset in file blocks (no csums)
811 * this extent record is for. This allows a file extent to point
812 * into the middle of an existing extent on disk, sharing it
813 * between two snapshots (useful if some bytes in the middle of the
814 * extent have changed
818 * the logical number of file blocks (no csums included). This
819 * always reflects the size uncompressed and without encoding.
823 } __attribute__ ((__packed__));
825 struct btrfs_csum_item {
827 } __attribute__ ((__packed__));
829 struct btrfs_dev_stats_item {
831 * grow this item struct at the end for future enhancements and keep
832 * the existing values unchanged
834 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
835 } __attribute__ ((__packed__));
837 /* different types of block groups (and chunks) */
838 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
839 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
840 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
841 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
842 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
843 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
844 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
845 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
846 #define BTRFS_NR_RAID_TYPES 5
848 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
849 BTRFS_BLOCK_GROUP_SYSTEM | \
850 BTRFS_BLOCK_GROUP_METADATA)
852 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
853 BTRFS_BLOCK_GROUP_RAID1 | \
854 BTRFS_BLOCK_GROUP_DUP | \
855 BTRFS_BLOCK_GROUP_RAID10)
857 * We need a bit for restriper to be able to tell when chunks of type
858 * SINGLE are available. This "extended" profile format is used in
859 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
860 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
861 * to avoid remappings between two formats in future.
863 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
865 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
866 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
868 static inline u64 chunk_to_extended(u64 flags)
870 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
871 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
875 static inline u64 extended_to_chunk(u64 flags)
877 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
880 struct btrfs_block_group_item {
882 __le64 chunk_objectid;
884 } __attribute__ ((__packed__));
886 struct btrfs_space_info {
889 u64 total_bytes; /* total bytes in the space,
890 this doesn't take mirrors into account */
891 u64 bytes_used; /* total bytes used,
892 this doesn't take mirrors into account */
893 u64 bytes_pinned; /* total bytes pinned, will be freed when the
894 transaction finishes */
895 u64 bytes_reserved; /* total bytes the allocator has reserved for
896 current allocations */
897 u64 bytes_readonly; /* total bytes that are read only */
899 u64 bytes_may_use; /* number of bytes that may be used for
900 delalloc/allocations */
901 u64 disk_used; /* total bytes used on disk */
902 u64 disk_total; /* total bytes on disk, takes mirrors into
906 * we bump reservation progress every time we decrement
907 * bytes_reserved. This way people waiting for reservations
908 * know something good has happened and they can check
909 * for progress. The number here isn't to be trusted, it
910 * just shows reclaim activity
912 unsigned long reservation_progress;
914 unsigned int full:1; /* indicates that we cannot allocate any more
915 chunks for this space */
916 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
918 unsigned int flush:1; /* set if we are trying to make space */
920 unsigned int force_alloc; /* set if we need to force a chunk
921 alloc for this space */
923 struct list_head list;
925 /* for block groups in our same type */
926 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
928 struct rw_semaphore groups_sem;
929 wait_queue_head_t wait;
932 struct btrfs_block_rsv {
935 struct btrfs_space_info *space_info;
941 * free clusters are used to claim free space in relatively large chunks,
942 * allowing us to do less seeky writes. They are used for all metadata
943 * allocations and data allocations in ssd mode.
945 struct btrfs_free_cluster {
947 spinlock_t refill_lock;
950 /* largest extent in this cluster */
953 /* first extent starting offset */
956 struct btrfs_block_group_cache *block_group;
958 * when a cluster is allocated from a block group, we put the
959 * cluster onto a list in the block group so that it can
960 * be freed before the block group is freed.
962 struct list_head block_group_list;
965 enum btrfs_caching_type {
967 BTRFS_CACHE_STARTED = 1,
968 BTRFS_CACHE_FAST = 2,
969 BTRFS_CACHE_FINISHED = 3,
972 enum btrfs_disk_cache_state {
973 BTRFS_DC_WRITTEN = 0,
977 BTRFS_DC_NEED_WRITE = 4,
980 struct btrfs_caching_control {
981 struct list_head list;
983 wait_queue_head_t wait;
984 struct btrfs_work work;
985 struct btrfs_block_group_cache *block_group;
990 struct btrfs_block_group_cache {
991 struct btrfs_key key;
992 struct btrfs_block_group_item item;
993 struct btrfs_fs_info *fs_info;
1001 u64 cache_generation;
1003 unsigned int dirty:1;
1004 unsigned int iref:1;
1006 int disk_cache_state;
1008 /* cache tracking stuff */
1010 struct btrfs_caching_control *caching_ctl;
1011 u64 last_byte_to_unpin;
1013 struct btrfs_space_info *space_info;
1015 /* free space cache stuff */
1016 struct btrfs_free_space_ctl *free_space_ctl;
1018 /* block group cache stuff */
1019 struct rb_node cache_node;
1021 /* for block groups in the same raid type */
1022 struct list_head list;
1027 /* List of struct btrfs_free_clusters for this block group.
1028 * Today it will only have one thing on it, but that may change
1030 struct list_head cluster_list;
1033 /* delayed seq elem */
1035 struct list_head list;
1040 struct reloc_control;
1041 struct btrfs_device;
1042 struct btrfs_fs_devices;
1043 struct btrfs_balance_control;
1044 struct btrfs_delayed_root;
1045 struct btrfs_fs_info {
1046 u8 fsid[BTRFS_FSID_SIZE];
1047 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1048 struct btrfs_root *extent_root;
1049 struct btrfs_root *tree_root;
1050 struct btrfs_root *chunk_root;
1051 struct btrfs_root *dev_root;
1052 struct btrfs_root *fs_root;
1053 struct btrfs_root *csum_root;
1055 /* the log root tree is a directory of all the other log roots */
1056 struct btrfs_root *log_root_tree;
1058 spinlock_t fs_roots_radix_lock;
1059 struct radix_tree_root fs_roots_radix;
1061 /* block group cache stuff */
1062 spinlock_t block_group_cache_lock;
1063 struct rb_root block_group_cache_tree;
1065 /* keep track of unallocated space */
1066 spinlock_t free_chunk_lock;
1067 u64 free_chunk_space;
1069 struct extent_io_tree freed_extents[2];
1070 struct extent_io_tree *pinned_extents;
1072 /* logical->physical extent mapping */
1073 struct btrfs_mapping_tree mapping_tree;
1076 * block reservation for extent, checksum, root tree and
1077 * delayed dir index item
1079 struct btrfs_block_rsv global_block_rsv;
1080 /* block reservation for delay allocation */
1081 struct btrfs_block_rsv delalloc_block_rsv;
1082 /* block reservation for metadata operations */
1083 struct btrfs_block_rsv trans_block_rsv;
1084 /* block reservation for chunk tree */
1085 struct btrfs_block_rsv chunk_block_rsv;
1086 /* block reservation for delayed operations */
1087 struct btrfs_block_rsv delayed_block_rsv;
1089 struct btrfs_block_rsv empty_block_rsv;
1092 u64 last_trans_committed;
1095 * this is updated to the current trans every time a full commit
1096 * is required instead of the faster short fsync log commits
1098 u64 last_trans_log_full_commit;
1099 unsigned long mount_opt;
1100 unsigned long compress_type:4;
1103 struct btrfs_transaction *running_transaction;
1104 wait_queue_head_t transaction_throttle;
1105 wait_queue_head_t transaction_wait;
1106 wait_queue_head_t transaction_blocked_wait;
1107 wait_queue_head_t async_submit_wait;
1109 struct btrfs_super_block *super_copy;
1110 struct btrfs_super_block *super_for_commit;
1111 struct block_device *__bdev;
1112 struct super_block *sb;
1113 struct inode *btree_inode;
1114 struct backing_dev_info bdi;
1115 struct mutex tree_log_mutex;
1116 struct mutex transaction_kthread_mutex;
1117 struct mutex cleaner_mutex;
1118 struct mutex chunk_mutex;
1119 struct mutex volume_mutex;
1121 * this protects the ordered operations list only while we are
1122 * processing all of the entries on it. This way we make
1123 * sure the commit code doesn't find the list temporarily empty
1124 * because another function happens to be doing non-waiting preflush
1125 * before jumping into the main commit.
1127 struct mutex ordered_operations_mutex;
1128 struct rw_semaphore extent_commit_sem;
1130 struct rw_semaphore cleanup_work_sem;
1132 struct rw_semaphore subvol_sem;
1133 struct srcu_struct subvol_srcu;
1135 spinlock_t trans_lock;
1137 * the reloc mutex goes with the trans lock, it is taken
1138 * during commit to protect us from the relocation code
1140 struct mutex reloc_mutex;
1142 struct list_head trans_list;
1143 struct list_head hashers;
1144 struct list_head dead_roots;
1145 struct list_head caching_block_groups;
1147 spinlock_t delayed_iput_lock;
1148 struct list_head delayed_iputs;
1150 /* this protects tree_mod_seq_list */
1151 spinlock_t tree_mod_seq_lock;
1152 atomic_t tree_mod_seq;
1153 struct list_head tree_mod_seq_list;
1154 struct seq_list tree_mod_seq_elem;
1155 wait_queue_head_t tree_mod_seq_wait;
1157 /* this protects tree_mod_log */
1158 rwlock_t tree_mod_log_lock;
1159 struct rb_root tree_mod_log;
1161 atomic_t nr_async_submits;
1162 atomic_t async_submit_draining;
1163 atomic_t nr_async_bios;
1164 atomic_t async_delalloc_pages;
1165 atomic_t open_ioctl_trans;
1168 * this is used by the balancing code to wait for all the pending
1171 spinlock_t ordered_extent_lock;
1174 * all of the data=ordered extents pending writeback
1175 * these can span multiple transactions and basically include
1176 * every dirty data page that isn't from nodatacow
1178 struct list_head ordered_extents;
1181 * all of the inodes that have delalloc bytes. It is possible for
1182 * this list to be empty even when there is still dirty data=ordered
1183 * extents waiting to finish IO.
1185 struct list_head delalloc_inodes;
1188 * special rename and truncate targets that must be on disk before
1189 * we're allowed to commit. This is basically the ext3 style
1190 * data=ordered list.
1192 struct list_head ordered_operations;
1195 * there is a pool of worker threads for checksumming during writes
1196 * and a pool for checksumming after reads. This is because readers
1197 * can run with FS locks held, and the writers may be waiting for
1198 * those locks. We don't want ordering in the pending list to cause
1199 * deadlocks, and so the two are serviced separately.
1201 * A third pool does submit_bio to avoid deadlocking with the other
1204 struct btrfs_workers generic_worker;
1205 struct btrfs_workers workers;
1206 struct btrfs_workers delalloc_workers;
1207 struct btrfs_workers endio_workers;
1208 struct btrfs_workers endio_meta_workers;
1209 struct btrfs_workers endio_meta_write_workers;
1210 struct btrfs_workers endio_write_workers;
1211 struct btrfs_workers endio_freespace_worker;
1212 struct btrfs_workers submit_workers;
1213 struct btrfs_workers caching_workers;
1214 struct btrfs_workers readahead_workers;
1217 * fixup workers take dirty pages that didn't properly go through
1218 * the cow mechanism and make them safe to write. It happens
1219 * for the sys_munmap function call path
1221 struct btrfs_workers fixup_workers;
1222 struct btrfs_workers delayed_workers;
1223 struct task_struct *transaction_kthread;
1224 struct task_struct *cleaner_kthread;
1225 int thread_pool_size;
1227 struct kobject super_kobj;
1228 struct completion kobj_unregister;
1231 int log_root_recovering;
1237 /* protected by the delalloc lock, used to keep from writing
1238 * metadata until there is a nice batch
1240 u64 dirty_metadata_bytes;
1241 struct list_head dirty_cowonly_roots;
1243 struct btrfs_fs_devices *fs_devices;
1246 * the space_info list is almost entirely read only. It only changes
1247 * when we add a new raid type to the FS, and that happens
1248 * very rarely. RCU is used to protect it.
1250 struct list_head space_info;
1252 struct reloc_control *reloc_ctl;
1254 spinlock_t delalloc_lock;
1257 /* data_alloc_cluster is only used in ssd mode */
1258 struct btrfs_free_cluster data_alloc_cluster;
1260 /* all metadata allocations go through this cluster */
1261 struct btrfs_free_cluster meta_alloc_cluster;
1263 /* auto defrag inodes go here */
1264 spinlock_t defrag_inodes_lock;
1265 struct rb_root defrag_inodes;
1266 atomic_t defrag_running;
1268 spinlock_t ref_cache_lock;
1269 u64 total_ref_cache_size;
1272 * these three are in extended format (availability of single
1273 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1274 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1276 u64 avail_data_alloc_bits;
1277 u64 avail_metadata_alloc_bits;
1278 u64 avail_system_alloc_bits;
1280 /* restriper state */
1281 spinlock_t balance_lock;
1282 struct mutex balance_mutex;
1283 atomic_t balance_running;
1284 atomic_t balance_pause_req;
1285 atomic_t balance_cancel_req;
1286 struct btrfs_balance_control *balance_ctl;
1287 wait_queue_head_t balance_wait_q;
1289 unsigned data_chunk_allocations;
1290 unsigned metadata_ratio;
1294 /* private scrub information */
1295 struct mutex scrub_lock;
1296 atomic_t scrubs_running;
1297 atomic_t scrub_pause_req;
1298 atomic_t scrubs_paused;
1299 atomic_t scrub_cancel_req;
1300 wait_queue_head_t scrub_pause_wait;
1301 struct rw_semaphore scrub_super_lock;
1302 int scrub_workers_refcnt;
1303 struct btrfs_workers scrub_workers;
1305 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1306 u32 check_integrity_print_mask;
1309 /* filesystem state */
1312 struct btrfs_delayed_root *delayed_root;
1314 /* readahead tree */
1315 spinlock_t reada_lock;
1316 struct radix_tree_root reada_tree;
1318 /* next backup root to be overwritten */
1319 int backup_root_index;
1323 * in ram representation of the tree. extent_root is used for all allocations
1324 * and for the extent tree extent_root root.
1327 struct extent_buffer *node;
1329 struct extent_buffer *commit_root;
1330 struct btrfs_root *log_root;
1331 struct btrfs_root *reloc_root;
1333 struct btrfs_root_item root_item;
1334 struct btrfs_key root_key;
1335 struct btrfs_fs_info *fs_info;
1336 struct extent_io_tree dirty_log_pages;
1338 struct kobject root_kobj;
1339 struct completion kobj_unregister;
1340 struct mutex objectid_mutex;
1342 spinlock_t accounting_lock;
1343 struct btrfs_block_rsv *block_rsv;
1345 /* free ino cache stuff */
1346 struct mutex fs_commit_mutex;
1347 struct btrfs_free_space_ctl *free_ino_ctl;
1348 enum btrfs_caching_type cached;
1349 spinlock_t cache_lock;
1350 wait_queue_head_t cache_wait;
1351 struct btrfs_free_space_ctl *free_ino_pinned;
1353 struct inode *cache_inode;
1355 struct mutex log_mutex;
1356 wait_queue_head_t log_writer_wait;
1357 wait_queue_head_t log_commit_wait[2];
1358 atomic_t log_writers;
1359 atomic_t log_commit[2];
1360 unsigned long log_transid;
1361 unsigned long last_log_commit;
1362 unsigned long log_batch;
1363 pid_t log_start_pid;
1364 bool log_multiple_pids;
1369 /* data allocations are done in sectorsize units */
1372 /* node allocations are done in nodesize units */
1375 /* leaf allocations are done in leafsize units */
1382 u64 highest_objectid;
1384 /* btrfs_record_root_in_trans is a multi-step process,
1385 * and it can race with the balancing code. But the
1386 * race is very small, and only the first time the root
1387 * is added to each transaction. So in_trans_setup
1388 * is used to tell us when more checks are required
1390 unsigned long in_trans_setup;
1395 u64 defrag_trans_start;
1396 struct btrfs_key defrag_progress;
1397 struct btrfs_key defrag_max;
1401 /* the dirty list is only used by non-reference counted roots */
1402 struct list_head dirty_list;
1404 struct list_head root_list;
1406 spinlock_t orphan_lock;
1407 atomic_t orphan_inodes;
1408 struct btrfs_block_rsv *orphan_block_rsv;
1409 int orphan_item_inserted;
1410 int orphan_cleanup_state;
1412 spinlock_t inode_lock;
1413 /* red-black tree that keeps track of in-memory inodes */
1414 struct rb_root inode_tree;
1417 * radix tree that keeps track of delayed nodes of every inode,
1418 * protected by inode_lock
1420 struct radix_tree_root delayed_nodes_tree;
1422 * right now this just gets used so that a root has its own devid
1423 * for stat. It may be used for more later
1430 struct btrfs_ioctl_defrag_range_args {
1431 /* start of the defrag operation */
1434 /* number of bytes to defrag, use (u64)-1 to say all */
1438 * flags for the operation, which can include turning
1439 * on compression for this one defrag
1444 * any extent bigger than this will be considered
1445 * already defragged. Use 0 to take the kernel default
1446 * Use 1 to say every single extent must be rewritten
1448 __u32 extent_thresh;
1451 * which compression method to use if turning on compression
1452 * for this defrag operation. If unspecified, zlib will
1455 __u32 compress_type;
1457 /* spare for later */
1463 * inode items have the data typically returned from stat and store other
1464 * info about object characteristics. There is one for every file and dir in
1467 #define BTRFS_INODE_ITEM_KEY 1
1468 #define BTRFS_INODE_REF_KEY 12
1469 #define BTRFS_XATTR_ITEM_KEY 24
1470 #define BTRFS_ORPHAN_ITEM_KEY 48
1471 /* reserve 2-15 close to the inode for later flexibility */
1474 * dir items are the name -> inode pointers in a directory. There is one
1475 * for every name in a directory.
1477 #define BTRFS_DIR_LOG_ITEM_KEY 60
1478 #define BTRFS_DIR_LOG_INDEX_KEY 72
1479 #define BTRFS_DIR_ITEM_KEY 84
1480 #define BTRFS_DIR_INDEX_KEY 96
1482 * extent data is for file data
1484 #define BTRFS_EXTENT_DATA_KEY 108
1487 * extent csums are stored in a separate tree and hold csums for
1488 * an entire extent on disk.
1490 #define BTRFS_EXTENT_CSUM_KEY 128
1493 * root items point to tree roots. They are typically in the root
1494 * tree used by the super block to find all the other trees
1496 #define BTRFS_ROOT_ITEM_KEY 132
1499 * root backrefs tie subvols and snapshots to the directory entries that
1502 #define BTRFS_ROOT_BACKREF_KEY 144
1505 * root refs make a fast index for listing all of the snapshots and
1506 * subvolumes referenced by a given root. They point directly to the
1507 * directory item in the root that references the subvol
1509 #define BTRFS_ROOT_REF_KEY 156
1512 * extent items are in the extent map tree. These record which blocks
1513 * are used, and how many references there are to each block
1515 #define BTRFS_EXTENT_ITEM_KEY 168
1517 #define BTRFS_TREE_BLOCK_REF_KEY 176
1519 #define BTRFS_EXTENT_DATA_REF_KEY 178
1521 #define BTRFS_EXTENT_REF_V0_KEY 180
1523 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1525 #define BTRFS_SHARED_DATA_REF_KEY 184
1528 * block groups give us hints into the extent allocation trees. Which
1529 * blocks are free etc etc
1531 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1533 #define BTRFS_DEV_EXTENT_KEY 204
1534 #define BTRFS_DEV_ITEM_KEY 216
1535 #define BTRFS_CHUNK_ITEM_KEY 228
1537 #define BTRFS_BALANCE_ITEM_KEY 248
1540 * Persistantly stores the io stats in the device tree.
1541 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1543 #define BTRFS_DEV_STATS_KEY 249
1546 * string items are for debugging. They just store a short string of
1549 #define BTRFS_STRING_ITEM_KEY 253
1552 * Flags for mount options.
1554 * Note: don't forget to add new options to btrfs_show_options()
1556 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1557 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1558 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1559 #define BTRFS_MOUNT_SSD (1 << 3)
1560 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1561 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1562 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1563 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1564 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1565 #define BTRFS_MOUNT_NOSSD (1 << 9)
1566 #define BTRFS_MOUNT_DISCARD (1 << 10)
1567 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1568 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1569 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1570 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1571 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1572 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1573 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1574 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1575 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1576 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1577 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1578 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1580 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1581 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1582 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1587 #define BTRFS_INODE_NODATASUM (1 << 0)
1588 #define BTRFS_INODE_NODATACOW (1 << 1)
1589 #define BTRFS_INODE_READONLY (1 << 2)
1590 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1591 #define BTRFS_INODE_PREALLOC (1 << 4)
1592 #define BTRFS_INODE_SYNC (1 << 5)
1593 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1594 #define BTRFS_INODE_APPEND (1 << 7)
1595 #define BTRFS_INODE_NODUMP (1 << 8)
1596 #define BTRFS_INODE_NOATIME (1 << 9)
1597 #define BTRFS_INODE_DIRSYNC (1 << 10)
1598 #define BTRFS_INODE_COMPRESS (1 << 11)
1600 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1602 struct btrfs_map_token {
1603 struct extent_buffer *eb;
1605 unsigned long offset;
1608 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1610 memset(token, 0, sizeof(*token));
1613 /* some macros to generate set/get funcs for the struct fields. This
1614 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1617 #define le8_to_cpu(v) (v)
1618 #define cpu_to_le8(v) (v)
1621 #define read_eb_member(eb, ptr, type, member, result) ( \
1622 read_extent_buffer(eb, (char *)(result), \
1623 ((unsigned long)(ptr)) + \
1624 offsetof(type, member), \
1625 sizeof(((type *)0)->member)))
1627 #define write_eb_member(eb, ptr, type, member, result) ( \
1628 write_extent_buffer(eb, (char *)(result), \
1629 ((unsigned long)(ptr)) + \
1630 offsetof(type, member), \
1631 sizeof(((type *)0)->member)))
1633 #ifndef BTRFS_SETGET_FUNCS
1634 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1635 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1636 u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
1637 void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
1638 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1641 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1642 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1644 type *p = page_address(eb->pages[0]); \
1645 u##bits res = le##bits##_to_cpu(p->member); \
1648 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1651 type *p = page_address(eb->pages[0]); \
1652 p->member = cpu_to_le##bits(val); \
1655 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1656 static inline u##bits btrfs_##name(type *s) \
1658 return le##bits##_to_cpu(s->member); \
1660 static inline void btrfs_set_##name(type *s, u##bits val) \
1662 s->member = cpu_to_le##bits(val); \
1665 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1666 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1667 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1668 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1669 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1670 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1672 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1673 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1674 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1675 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1676 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1677 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1679 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1680 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1682 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1684 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1686 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1688 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1690 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1691 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1693 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1695 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1697 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1700 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1702 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1705 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1707 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1710 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1711 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1712 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1713 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1714 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1715 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1716 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1717 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1718 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1719 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1720 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1722 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1724 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1727 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1728 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1729 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1731 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1733 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1735 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1737 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1738 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1740 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1742 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1743 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1745 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1748 unsigned long offset = (unsigned long)c;
1749 offset += offsetof(struct btrfs_chunk, stripe);
1750 offset += nr * sizeof(struct btrfs_stripe);
1751 return (struct btrfs_stripe *)offset;
1754 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1756 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1759 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1760 struct btrfs_chunk *c, int nr)
1762 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1765 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1766 struct btrfs_chunk *c, int nr)
1768 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1771 /* struct btrfs_block_group_item */
1772 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1774 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1776 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1777 struct btrfs_block_group_item, chunk_objectid, 64);
1779 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1780 struct btrfs_block_group_item, chunk_objectid, 64);
1781 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1782 struct btrfs_block_group_item, flags, 64);
1783 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1784 struct btrfs_block_group_item, flags, 64);
1786 /* struct btrfs_inode_ref */
1787 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1788 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1790 /* struct btrfs_inode_item */
1791 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1792 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1793 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1794 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1795 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1796 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1797 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1798 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1799 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1800 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1801 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1802 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1804 static inline struct btrfs_timespec *
1805 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1807 unsigned long ptr = (unsigned long)inode_item;
1808 ptr += offsetof(struct btrfs_inode_item, atime);
1809 return (struct btrfs_timespec *)ptr;
1812 static inline struct btrfs_timespec *
1813 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1815 unsigned long ptr = (unsigned long)inode_item;
1816 ptr += offsetof(struct btrfs_inode_item, mtime);
1817 return (struct btrfs_timespec *)ptr;
1820 static inline struct btrfs_timespec *
1821 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1823 unsigned long ptr = (unsigned long)inode_item;
1824 ptr += offsetof(struct btrfs_inode_item, ctime);
1825 return (struct btrfs_timespec *)ptr;
1828 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1829 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1831 /* struct btrfs_dev_extent */
1832 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1834 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1835 chunk_objectid, 64);
1836 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1838 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1840 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1842 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1843 return (u8 *)((unsigned long)dev + ptr);
1846 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1847 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1849 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1851 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1854 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1856 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1857 struct btrfs_tree_block_info *item,
1858 struct btrfs_disk_key *key)
1860 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1863 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1864 struct btrfs_tree_block_info *item,
1865 struct btrfs_disk_key *key)
1867 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1870 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1872 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1874 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1876 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1879 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1882 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1884 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1887 static inline u32 btrfs_extent_inline_ref_size(int type)
1889 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1890 type == BTRFS_SHARED_BLOCK_REF_KEY)
1891 return sizeof(struct btrfs_extent_inline_ref);
1892 if (type == BTRFS_SHARED_DATA_REF_KEY)
1893 return sizeof(struct btrfs_shared_data_ref) +
1894 sizeof(struct btrfs_extent_inline_ref);
1895 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1896 return sizeof(struct btrfs_extent_data_ref) +
1897 offsetof(struct btrfs_extent_inline_ref, offset);
1902 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1903 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1905 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1906 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1908 /* struct btrfs_node */
1909 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1910 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1912 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1915 ptr = offsetof(struct btrfs_node, ptrs) +
1916 sizeof(struct btrfs_key_ptr) * nr;
1917 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1920 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1924 ptr = offsetof(struct btrfs_node, ptrs) +
1925 sizeof(struct btrfs_key_ptr) * nr;
1926 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1929 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1932 ptr = offsetof(struct btrfs_node, ptrs) +
1933 sizeof(struct btrfs_key_ptr) * nr;
1934 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1937 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1941 ptr = offsetof(struct btrfs_node, ptrs) +
1942 sizeof(struct btrfs_key_ptr) * nr;
1943 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1946 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1948 return offsetof(struct btrfs_node, ptrs) +
1949 sizeof(struct btrfs_key_ptr) * nr;
1952 void btrfs_node_key(struct extent_buffer *eb,
1953 struct btrfs_disk_key *disk_key, int nr);
1955 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1956 struct btrfs_disk_key *disk_key, int nr)
1959 ptr = btrfs_node_key_ptr_offset(nr);
1960 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1961 struct btrfs_key_ptr, key, disk_key);
1964 /* struct btrfs_item */
1965 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1966 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1968 static inline unsigned long btrfs_item_nr_offset(int nr)
1970 return offsetof(struct btrfs_leaf, items) +
1971 sizeof(struct btrfs_item) * nr;
1974 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1977 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1980 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1981 struct btrfs_item *item)
1983 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1986 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1988 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1991 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1993 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1996 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1998 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2001 static inline void btrfs_item_key(struct extent_buffer *eb,
2002 struct btrfs_disk_key *disk_key, int nr)
2004 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2005 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2008 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2009 struct btrfs_disk_key *disk_key, int nr)
2011 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2012 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2015 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2018 * struct btrfs_root_ref
2020 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2021 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2022 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2024 /* struct btrfs_dir_item */
2025 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2026 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2027 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2028 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2030 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2031 struct btrfs_dir_item *item,
2032 struct btrfs_disk_key *key)
2034 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2037 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2038 struct btrfs_dir_item *item,
2039 struct btrfs_disk_key *key)
2041 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2044 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2046 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2048 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2051 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2052 struct btrfs_free_space_header *h,
2053 struct btrfs_disk_key *key)
2055 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2058 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2059 struct btrfs_free_space_header *h,
2060 struct btrfs_disk_key *key)
2062 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2065 /* struct btrfs_disk_key */
2066 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2068 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2069 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2071 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2072 struct btrfs_disk_key *disk)
2074 cpu->offset = le64_to_cpu(disk->offset);
2075 cpu->type = disk->type;
2076 cpu->objectid = le64_to_cpu(disk->objectid);
2079 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2080 struct btrfs_key *cpu)
2082 disk->offset = cpu_to_le64(cpu->offset);
2083 disk->type = cpu->type;
2084 disk->objectid = cpu_to_le64(cpu->objectid);
2087 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2088 struct btrfs_key *key, int nr)
2090 struct btrfs_disk_key disk_key;
2091 btrfs_node_key(eb, &disk_key, nr);
2092 btrfs_disk_key_to_cpu(key, &disk_key);
2095 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2096 struct btrfs_key *key, int nr)
2098 struct btrfs_disk_key disk_key;
2099 btrfs_item_key(eb, &disk_key, nr);
2100 btrfs_disk_key_to_cpu(key, &disk_key);
2103 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2104 struct btrfs_dir_item *item,
2105 struct btrfs_key *key)
2107 struct btrfs_disk_key disk_key;
2108 btrfs_dir_item_key(eb, item, &disk_key);
2109 btrfs_disk_key_to_cpu(key, &disk_key);
2113 static inline u8 btrfs_key_type(struct btrfs_key *key)
2118 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2123 /* struct btrfs_header */
2124 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2125 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2127 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2128 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2129 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2130 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2132 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2134 return (btrfs_header_flags(eb) & flag) == flag;
2137 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2139 u64 flags = btrfs_header_flags(eb);
2140 btrfs_set_header_flags(eb, flags | flag);
2141 return (flags & flag) == flag;
2144 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2146 u64 flags = btrfs_header_flags(eb);
2147 btrfs_set_header_flags(eb, flags & ~flag);
2148 return (flags & flag) == flag;
2151 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2153 u64 flags = btrfs_header_flags(eb);
2154 return flags >> BTRFS_BACKREF_REV_SHIFT;
2157 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2160 u64 flags = btrfs_header_flags(eb);
2161 flags &= ~BTRFS_BACKREF_REV_MASK;
2162 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2163 btrfs_set_header_flags(eb, flags);
2166 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2168 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2172 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2174 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2178 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2180 return btrfs_header_level(eb) == 0;
2183 /* struct btrfs_root_item */
2184 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2186 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2187 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2188 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2190 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2192 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2193 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2194 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2195 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2196 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2197 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2198 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2199 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2202 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2204 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2207 /* struct btrfs_root_backup */
2208 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2210 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2212 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2213 tree_root_level, 8);
2215 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2217 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2218 chunk_root_gen, 64);
2219 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2220 chunk_root_level, 8);
2222 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2224 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2225 extent_root_gen, 64);
2226 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2227 extent_root_level, 8);
2229 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2231 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2233 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2236 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2238 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2240 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2243 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2245 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2247 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2248 csum_root_level, 8);
2249 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2251 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2253 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2256 /* struct btrfs_balance_item */
2257 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2259 static inline void btrfs_balance_data(struct extent_buffer *eb,
2260 struct btrfs_balance_item *bi,
2261 struct btrfs_disk_balance_args *ba)
2263 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2266 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2267 struct btrfs_balance_item *bi,
2268 struct btrfs_disk_balance_args *ba)
2270 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2273 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2274 struct btrfs_balance_item *bi,
2275 struct btrfs_disk_balance_args *ba)
2277 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2280 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2281 struct btrfs_balance_item *bi,
2282 struct btrfs_disk_balance_args *ba)
2284 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2287 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2288 struct btrfs_balance_item *bi,
2289 struct btrfs_disk_balance_args *ba)
2291 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2294 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2295 struct btrfs_balance_item *bi,
2296 struct btrfs_disk_balance_args *ba)
2298 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2302 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2303 struct btrfs_disk_balance_args *disk)
2305 memset(cpu, 0, sizeof(*cpu));
2307 cpu->profiles = le64_to_cpu(disk->profiles);
2308 cpu->usage = le64_to_cpu(disk->usage);
2309 cpu->devid = le64_to_cpu(disk->devid);
2310 cpu->pstart = le64_to_cpu(disk->pstart);
2311 cpu->pend = le64_to_cpu(disk->pend);
2312 cpu->vstart = le64_to_cpu(disk->vstart);
2313 cpu->vend = le64_to_cpu(disk->vend);
2314 cpu->target = le64_to_cpu(disk->target);
2315 cpu->flags = le64_to_cpu(disk->flags);
2319 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2320 struct btrfs_balance_args *cpu)
2322 memset(disk, 0, sizeof(*disk));
2324 disk->profiles = cpu_to_le64(cpu->profiles);
2325 disk->usage = cpu_to_le64(cpu->usage);
2326 disk->devid = cpu_to_le64(cpu->devid);
2327 disk->pstart = cpu_to_le64(cpu->pstart);
2328 disk->pend = cpu_to_le64(cpu->pend);
2329 disk->vstart = cpu_to_le64(cpu->vstart);
2330 disk->vend = cpu_to_le64(cpu->vend);
2331 disk->target = cpu_to_le64(cpu->target);
2332 disk->flags = cpu_to_le64(cpu->flags);
2335 /* struct btrfs_super_block */
2336 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2337 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2338 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2340 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2341 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2342 struct btrfs_super_block, sys_chunk_array_size, 32);
2343 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2344 struct btrfs_super_block, chunk_root_generation, 64);
2345 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2347 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2349 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2350 chunk_root_level, 8);
2351 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2353 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2354 log_root_transid, 64);
2355 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2357 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2359 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2361 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2363 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2365 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2367 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2369 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2370 root_dir_objectid, 64);
2371 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2373 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2375 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2376 compat_ro_flags, 64);
2377 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2378 incompat_flags, 64);
2379 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2381 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2382 cache_generation, 64);
2384 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2386 int t = btrfs_super_csum_type(s);
2387 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2388 return btrfs_csum_sizes[t];
2391 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2393 return offsetof(struct btrfs_leaf, items);
2396 /* struct btrfs_file_extent_item */
2397 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2399 static inline unsigned long
2400 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2402 unsigned long offset = (unsigned long)e;
2403 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2407 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2409 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2412 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2414 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2416 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2417 disk_num_bytes, 64);
2418 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2420 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2422 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2424 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2426 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2428 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2429 other_encoding, 16);
2431 /* this returns the number of file bytes represented by the inline item.
2432 * If an item is compressed, this is the uncompressed size
2434 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2435 struct btrfs_file_extent_item *e)
2437 return btrfs_file_extent_ram_bytes(eb, e);
2441 * this returns the number of bytes used by the item on disk, minus the
2442 * size of any extent headers. If a file is compressed on disk, this is
2443 * the compressed size
2445 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2446 struct btrfs_item *e)
2448 unsigned long offset;
2449 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2450 return btrfs_item_size(eb, e) - offset;
2453 /* btrfs_dev_stats_item */
2454 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2455 struct btrfs_dev_stats_item *ptr,
2460 read_extent_buffer(eb, &val,
2461 offsetof(struct btrfs_dev_stats_item, values) +
2462 ((unsigned long)ptr) + (index * sizeof(u64)),
2467 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2468 struct btrfs_dev_stats_item *ptr,
2471 write_extent_buffer(eb, &val,
2472 offsetof(struct btrfs_dev_stats_item, values) +
2473 ((unsigned long)ptr) + (index * sizeof(u64)),
2477 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2479 return sb->s_fs_info;
2482 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2485 return root->leafsize;
2486 return root->nodesize;
2489 /* helper function to cast into the data area of the leaf. */
2490 #define btrfs_item_ptr(leaf, slot, type) \
2491 ((type *)(btrfs_leaf_data(leaf) + \
2492 btrfs_item_offset_nr(leaf, slot)))
2494 #define btrfs_item_ptr_offset(leaf, slot) \
2495 ((unsigned long)(btrfs_leaf_data(leaf) + \
2496 btrfs_item_offset_nr(leaf, slot)))
2498 static inline struct dentry *fdentry(struct file *file)
2500 return file->f_path.dentry;
2503 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2505 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2506 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2509 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2511 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2515 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2518 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2523 * Doing a truncate won't result in new nodes or leaves, just what we need for
2526 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2529 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2533 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2534 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2535 struct btrfs_root *root, unsigned long count);
2536 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2537 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2538 struct btrfs_root *root, u64 bytenr,
2539 u64 num_bytes, u64 *refs, u64 *flags);
2540 int btrfs_pin_extent(struct btrfs_root *root,
2541 u64 bytenr, u64 num, int reserved);
2542 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2543 struct btrfs_root *root,
2544 u64 bytenr, u64 num_bytes);
2545 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2546 struct btrfs_root *root,
2547 u64 objectid, u64 offset, u64 bytenr);
2548 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2549 struct btrfs_fs_info *info,
2551 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2552 u64 btrfs_find_block_group(struct btrfs_root *root,
2553 u64 search_start, u64 search_hint, int owner);
2554 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2555 struct btrfs_root *root, u32 blocksize,
2556 u64 parent, u64 root_objectid,
2557 struct btrfs_disk_key *key, int level,
2558 u64 hint, u64 empty_size);
2559 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2560 struct btrfs_root *root,
2561 struct extent_buffer *buf,
2562 u64 parent, int last_ref);
2563 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2564 struct btrfs_root *root,
2565 u64 bytenr, u32 blocksize,
2567 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2568 struct btrfs_root *root,
2569 u64 root_objectid, u64 owner,
2570 u64 offset, struct btrfs_key *ins);
2571 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2572 struct btrfs_root *root,
2573 u64 root_objectid, u64 owner, u64 offset,
2574 struct btrfs_key *ins);
2575 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2576 struct btrfs_root *root,
2577 u64 num_bytes, u64 min_alloc_size,
2578 u64 empty_size, u64 hint_byte,
2579 struct btrfs_key *ins, u64 data);
2580 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2581 struct extent_buffer *buf, int full_backref, int for_cow);
2582 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2583 struct extent_buffer *buf, int full_backref, int for_cow);
2584 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2585 struct btrfs_root *root,
2586 u64 bytenr, u64 num_bytes, u64 flags,
2588 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2589 struct btrfs_root *root,
2590 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2591 u64 owner, u64 offset, int for_cow);
2593 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2594 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2595 u64 start, u64 len);
2596 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root);
2598 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2599 struct btrfs_root *root);
2600 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 u64 bytenr, u64 num_bytes, u64 parent,
2603 u64 root_objectid, u64 owner, u64 offset, int for_cow);
2605 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2606 struct btrfs_root *root);
2607 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2608 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2609 int btrfs_read_block_groups(struct btrfs_root *root);
2610 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2611 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2612 struct btrfs_root *root, u64 bytes_used,
2613 u64 type, u64 chunk_objectid, u64 chunk_offset,
2615 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2616 struct btrfs_root *root, u64 group_start);
2617 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2618 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2619 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2620 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2621 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2622 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2623 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2624 struct btrfs_root *root);
2625 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2626 struct inode *inode);
2627 void btrfs_orphan_release_metadata(struct inode *inode);
2628 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2629 struct btrfs_pending_snapshot *pending);
2630 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2631 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2632 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2633 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2634 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2635 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2636 void btrfs_free_block_rsv(struct btrfs_root *root,
2637 struct btrfs_block_rsv *rsv);
2638 int btrfs_block_rsv_add(struct btrfs_root *root,
2639 struct btrfs_block_rsv *block_rsv,
2641 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2642 struct btrfs_block_rsv *block_rsv,
2644 int btrfs_block_rsv_check(struct btrfs_root *root,
2645 struct btrfs_block_rsv *block_rsv, int min_factor);
2646 int btrfs_block_rsv_refill(struct btrfs_root *root,
2647 struct btrfs_block_rsv *block_rsv,
2649 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2650 struct btrfs_block_rsv *block_rsv,
2652 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2653 struct btrfs_block_rsv *dst_rsv,
2655 void btrfs_block_rsv_release(struct btrfs_root *root,
2656 struct btrfs_block_rsv *block_rsv,
2658 int btrfs_set_block_group_ro(struct btrfs_root *root,
2659 struct btrfs_block_group_cache *cache);
2660 void btrfs_set_block_group_rw(struct btrfs_root *root,
2661 struct btrfs_block_group_cache *cache);
2662 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2663 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2664 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2665 u64 start, u64 end);
2666 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2667 u64 num_bytes, u64 *actual_bytes);
2668 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2669 struct btrfs_root *root, u64 type);
2670 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2672 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2674 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2675 int level, int *slot);
2676 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2677 int btrfs_previous_item(struct btrfs_root *root,
2678 struct btrfs_path *path, u64 min_objectid,
2680 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2681 struct btrfs_root *root, struct btrfs_path *path,
2682 struct btrfs_key *new_key);
2683 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2684 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2685 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2686 struct btrfs_key *key, int lowest_level,
2687 int cache_only, u64 min_trans);
2688 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2689 struct btrfs_key *max_key,
2690 struct btrfs_path *path, int cache_only,
2692 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *root, struct extent_buffer *buf,
2694 struct extent_buffer *parent, int parent_slot,
2695 struct extent_buffer **cow_ret);
2696 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2697 struct btrfs_root *root,
2698 struct extent_buffer *buf,
2699 struct extent_buffer **cow_ret, u64 new_root_objectid);
2700 int btrfs_block_can_be_shared(struct btrfs_root *root,
2701 struct extent_buffer *buf);
2702 void btrfs_extend_item(struct btrfs_trans_handle *trans,
2703 struct btrfs_root *root, struct btrfs_path *path,
2705 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
2706 struct btrfs_root *root,
2707 struct btrfs_path *path,
2708 u32 new_size, int from_end);
2709 int btrfs_split_item(struct btrfs_trans_handle *trans,
2710 struct btrfs_root *root,
2711 struct btrfs_path *path,
2712 struct btrfs_key *new_key,
2713 unsigned long split_offset);
2714 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2715 struct btrfs_root *root,
2716 struct btrfs_path *path,
2717 struct btrfs_key *new_key);
2718 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2719 *root, struct btrfs_key *key, struct btrfs_path *p, int
2721 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
2722 struct btrfs_path *p, u64 time_seq);
2723 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2724 struct btrfs_root *root, struct extent_buffer *parent,
2725 int start_slot, int cache_only, u64 *last_ret,
2726 struct btrfs_key *progress);
2727 void btrfs_release_path(struct btrfs_path *p);
2728 struct btrfs_path *btrfs_alloc_path(void);
2729 void btrfs_free_path(struct btrfs_path *p);
2730 void btrfs_set_path_blocking(struct btrfs_path *p);
2731 void btrfs_clear_path_blocking(struct btrfs_path *p,
2732 struct extent_buffer *held, int held_rw);
2733 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2735 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2736 struct btrfs_path *path, int slot, int nr);
2737 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2738 struct btrfs_root *root,
2739 struct btrfs_path *path)
2741 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2744 void setup_items_for_insert(struct btrfs_trans_handle *trans,
2745 struct btrfs_root *root, struct btrfs_path *path,
2746 struct btrfs_key *cpu_key, u32 *data_size,
2747 u32 total_data, u32 total_size, int nr);
2748 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2749 *root, struct btrfs_key *key, void *data, u32 data_size);
2750 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2751 struct btrfs_root *root,
2752 struct btrfs_path *path,
2753 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2755 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2756 struct btrfs_root *root,
2757 struct btrfs_path *path,
2758 struct btrfs_key *key,
2761 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2764 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2765 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2767 static inline int btrfs_next_old_item(struct btrfs_root *root,
2768 struct btrfs_path *p, u64 time_seq)
2771 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2772 return btrfs_next_old_leaf(root, p, time_seq);
2775 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2777 return btrfs_next_old_item(root, p, 0);
2779 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2780 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2781 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2782 struct btrfs_block_rsv *block_rsv,
2783 int update_ref, int for_reloc);
2784 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2785 struct btrfs_root *root,
2786 struct extent_buffer *node,
2787 struct extent_buffer *parent);
2788 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2791 * Get synced with close_ctree()
2794 return fs_info->closing;
2796 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2798 kfree(fs_info->balance_ctl);
2799 kfree(fs_info->delayed_root);
2800 kfree(fs_info->extent_root);
2801 kfree(fs_info->tree_root);
2802 kfree(fs_info->chunk_root);
2803 kfree(fs_info->dev_root);
2804 kfree(fs_info->csum_root);
2805 kfree(fs_info->super_copy);
2806 kfree(fs_info->super_for_commit);
2810 /* tree mod log functions from ctree.c */
2811 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2812 struct seq_list *elem);
2813 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2814 struct seq_list *elem);
2815 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
2817 return atomic_inc_return(&fs_info->tree_mod_seq);
2821 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2822 struct btrfs_path *path,
2823 u64 root_id, u64 ref_id);
2824 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2825 struct btrfs_root *tree_root,
2826 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2827 const char *name, int name_len);
2828 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2829 struct btrfs_root *tree_root,
2830 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2831 const char *name, int name_len);
2832 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2833 struct btrfs_key *key);
2834 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2835 *root, struct btrfs_key *key, struct btrfs_root_item
2837 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2838 struct btrfs_root *root,
2839 struct btrfs_key *key,
2840 struct btrfs_root_item *item);
2841 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2842 btrfs_root_item *item, struct btrfs_key *key);
2843 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2844 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2845 void btrfs_set_root_node(struct btrfs_root_item *item,
2846 struct extent_buffer *node);
2847 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2850 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2851 struct btrfs_root *root, const char *name,
2852 int name_len, struct inode *dir,
2853 struct btrfs_key *location, u8 type, u64 index);
2854 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2855 struct btrfs_root *root,
2856 struct btrfs_path *path, u64 dir,
2857 const char *name, int name_len,
2859 struct btrfs_dir_item *
2860 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root,
2862 struct btrfs_path *path, u64 dir,
2863 u64 objectid, const char *name, int name_len,
2865 struct btrfs_dir_item *
2866 btrfs_search_dir_index_item(struct btrfs_root *root,
2867 struct btrfs_path *path, u64 dirid,
2868 const char *name, int name_len);
2869 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2870 struct btrfs_path *path,
2871 const char *name, int name_len);
2872 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2873 struct btrfs_root *root,
2874 struct btrfs_path *path,
2875 struct btrfs_dir_item *di);
2876 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2877 struct btrfs_root *root,
2878 struct btrfs_path *path, u64 objectid,
2879 const char *name, u16 name_len,
2880 const void *data, u16 data_len);
2881 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2882 struct btrfs_root *root,
2883 struct btrfs_path *path, u64 dir,
2884 const char *name, u16 name_len,
2886 int verify_dir_item(struct btrfs_root *root,
2887 struct extent_buffer *leaf,
2888 struct btrfs_dir_item *dir_item);
2891 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2892 struct btrfs_root *root, u64 offset);
2893 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2894 struct btrfs_root *root, u64 offset);
2895 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2898 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2899 struct btrfs_root *root,
2900 const char *name, int name_len,
2901 u64 inode_objectid, u64 ref_objectid, u64 index);
2902 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2903 struct btrfs_root *root,
2904 const char *name, int name_len,
2905 u64 inode_objectid, u64 ref_objectid, u64 *index);
2906 struct btrfs_inode_ref *
2907 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2908 struct btrfs_root *root,
2909 struct btrfs_path *path,
2910 const char *name, int name_len,
2911 u64 inode_objectid, u64 ref_objectid, int mod);
2912 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root,
2914 struct btrfs_path *path, u64 objectid);
2915 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2916 *root, struct btrfs_path *path,
2917 struct btrfs_key *location, int mod);
2920 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2921 struct btrfs_root *root, u64 bytenr, u64 len);
2922 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2923 struct bio *bio, u32 *dst);
2924 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2925 struct bio *bio, u64 logical_offset, u32 *dst);
2926 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2927 struct btrfs_root *root,
2928 u64 objectid, u64 pos,
2929 u64 disk_offset, u64 disk_num_bytes,
2930 u64 num_bytes, u64 offset, u64 ram_bytes,
2931 u8 compression, u8 encryption, u16 other_encoding);
2932 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2933 struct btrfs_root *root,
2934 struct btrfs_path *path, u64 objectid,
2935 u64 bytenr, int mod);
2936 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2937 struct btrfs_root *root,
2938 struct btrfs_ordered_sum *sums);
2939 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2940 struct bio *bio, u64 file_start, int contig);
2941 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2942 struct btrfs_root *root,
2943 struct btrfs_path *path,
2944 u64 bytenr, int cow);
2945 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2946 struct btrfs_root *root, struct btrfs_path *path,
2948 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2949 struct list_head *list, int search_commit);
2951 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2952 size_t pg_offset, u64 start, u64 len,
2955 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2956 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2957 #define ClearPageChecked ClearPageFsMisc
2958 #define SetPageChecked SetPageFsMisc
2959 #define PageChecked PageFsMisc
2962 /* This forces readahead on a given range of bytes in an inode */
2963 static inline void btrfs_force_ra(struct address_space *mapping,
2964 struct file_ra_state *ra, struct file *file,
2965 pgoff_t offset, unsigned long req_size)
2967 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2970 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2971 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2972 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2973 struct btrfs_root *root,
2974 struct inode *dir, struct inode *inode,
2975 const char *name, int name_len);
2976 int btrfs_add_link(struct btrfs_trans_handle *trans,
2977 struct inode *parent_inode, struct inode *inode,
2978 const char *name, int name_len, int add_backref, u64 index);
2979 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2980 struct btrfs_root *root,
2981 struct inode *dir, u64 objectid,
2982 const char *name, int name_len);
2983 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2984 struct btrfs_root *root,
2985 struct inode *inode, u64 new_size,
2988 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2989 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2990 struct extent_state **cached_state);
2991 int btrfs_writepages(struct address_space *mapping,
2992 struct writeback_control *wbc);
2993 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2994 struct btrfs_root *new_root, u64 new_dirid);
2995 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2996 size_t size, struct bio *bio, unsigned long bio_flags);
2998 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2999 int btrfs_readpage(struct file *file, struct page *page);
3000 void btrfs_evict_inode(struct inode *inode);
3001 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3002 int btrfs_dirty_inode(struct inode *inode);
3003 int btrfs_update_time(struct file *file);
3004 struct inode *btrfs_alloc_inode(struct super_block *sb);
3005 void btrfs_destroy_inode(struct inode *inode);
3006 int btrfs_drop_inode(struct inode *inode);
3007 int btrfs_init_cachep(void);
3008 void btrfs_destroy_cachep(void);
3009 long btrfs_ioctl_trans_end(struct file *file);
3010 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3011 struct btrfs_root *root, int *was_new);
3012 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3013 size_t pg_offset, u64 start, u64 end,
3015 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3016 struct btrfs_root *root,
3017 struct inode *inode);
3018 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3019 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3020 int btrfs_orphan_cleanup(struct btrfs_root *root);
3021 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3022 struct btrfs_root *root);
3023 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3024 void btrfs_invalidate_inodes(struct btrfs_root *root);
3025 void btrfs_add_delayed_iput(struct inode *inode);
3026 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3027 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3028 u64 start, u64 num_bytes, u64 min_size,
3029 loff_t actual_len, u64 *alloc_hint);
3030 int btrfs_prealloc_file_range_trans(struct inode *inode,
3031 struct btrfs_trans_handle *trans, int mode,
3032 u64 start, u64 num_bytes, u64 min_size,
3033 loff_t actual_len, u64 *alloc_hint);
3034 extern const struct dentry_operations btrfs_dentry_operations;
3037 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3038 void btrfs_update_iflags(struct inode *inode);
3039 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3040 int btrfs_defrag_file(struct inode *inode, struct file *file,
3041 struct btrfs_ioctl_defrag_range_args *range,
3042 u64 newer_than, unsigned long max_pages);
3044 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3045 struct inode *inode);
3046 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3047 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3048 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3050 extern const struct file_operations btrfs_file_operations;
3051 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
3052 u64 start, u64 end, u64 *hint_byte, int drop_cache);
3053 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3054 struct inode *inode, u64 start, u64 end);
3055 int btrfs_release_file(struct inode *inode, struct file *file);
3056 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3057 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3058 struct page **pages, size_t num_pages,
3059 loff_t pos, size_t write_bytes,
3060 struct extent_state **cached);
3063 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3064 struct btrfs_root *root, int cache_only);
3067 int btrfs_init_sysfs(void);
3068 void btrfs_exit_sysfs(void);
3071 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3074 int btrfs_parse_options(struct btrfs_root *root, char *options);
3075 int btrfs_sync_fs(struct super_block *sb, int wait);
3076 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3077 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3078 unsigned int line, int errno, const char *fmt, ...);
3080 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3081 struct btrfs_root *root, const char *function,
3082 unsigned int line, int errno);
3084 #define btrfs_abort_transaction(trans, root, errno) \
3086 __btrfs_abort_transaction(trans, root, __func__, \
3090 #define btrfs_std_error(fs_info, errno) \
3093 __btrfs_std_error((fs_info), __func__, \
3094 __LINE__, (errno), NULL); \
3097 #define btrfs_error(fs_info, errno, fmt, args...) \
3099 __btrfs_std_error((fs_info), __func__, __LINE__, \
3100 (errno), fmt, ##args); \
3103 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3104 unsigned int line, int errno, const char *fmt, ...);
3106 #define btrfs_panic(fs_info, errno, fmt, args...) \
3108 struct btrfs_fs_info *_i = (fs_info); \
3109 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3110 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3114 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3115 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3116 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3117 struct inode *inode, struct inode *dir);
3118 int btrfs_acl_chmod(struct inode *inode);
3120 #define btrfs_get_acl NULL
3121 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3122 struct inode *inode, struct inode *dir)
3126 static inline int btrfs_acl_chmod(struct inode *inode)
3133 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3134 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3135 struct btrfs_root *root);
3136 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3137 struct btrfs_root *root);
3138 int btrfs_recover_relocation(struct btrfs_root *root);
3139 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3140 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3141 struct btrfs_root *root, struct extent_buffer *buf,
3142 struct extent_buffer *cow);
3143 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3144 struct btrfs_pending_snapshot *pending,
3145 u64 *bytes_to_reserve);
3146 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3147 struct btrfs_pending_snapshot *pending);
3150 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
3151 struct btrfs_scrub_progress *progress, int readonly);
3152 void btrfs_scrub_pause(struct btrfs_root *root);
3153 void btrfs_scrub_pause_super(struct btrfs_root *root);
3154 void btrfs_scrub_continue(struct btrfs_root *root);
3155 void btrfs_scrub_continue_super(struct btrfs_root *root);
3156 int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
3157 int btrfs_scrub_cancel(struct btrfs_root *root);
3158 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3159 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3160 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3161 struct btrfs_scrub_progress *progress);
3164 struct reada_control {
3165 struct btrfs_root *root; /* tree to prefetch */
3166 struct btrfs_key key_start;
3167 struct btrfs_key key_end; /* exclusive */
3170 wait_queue_head_t wait;
3172 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3173 struct btrfs_key *start, struct btrfs_key *end);
3174 int btrfs_reada_wait(void *handle);
3175 void btrfs_reada_detach(void *handle);
3176 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3177 u64 start, int err);
3179 static inline int is_fstree(u64 rootid)
3181 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3182 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)