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 "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 extern struct kmem_cache *btrfs_trans_handle_cachep;
42 extern struct kmem_cache *btrfs_transaction_cachep;
43 extern struct kmem_cache *btrfs_bit_radix_cachep;
44 extern struct kmem_cache *btrfs_path_cachep;
45 extern struct kmem_cache *btrfs_free_space_cachep;
46 struct btrfs_ordered_sum;
48 #define BTRFS_MAGIC "_BHRfS_M"
50 #define BTRFS_MAX_LEVEL 8
52 #define BTRFS_COMPAT_EXTENT_TREE_V0
55 * files bigger than this get some pre-flushing when they are added
56 * to the ordered operations list. That way we limit the total
57 * work done by the commit
59 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
61 /* holds pointers to all of the tree roots */
62 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
64 /* stores information about which extents are in use, and reference counts */
65 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
68 * chunk tree stores translations from logical -> physical block numbering
69 * the super block points to the chunk tree
71 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
74 * stores information about which areas of a given device are in use.
75 * one per device. The tree of tree roots points to the device tree
77 #define BTRFS_DEV_TREE_OBJECTID 4ULL
79 /* one per subvolume, storing files and directories */
80 #define BTRFS_FS_TREE_OBJECTID 5ULL
82 /* directory objectid inside the root tree */
83 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
85 /* holds checksums of all the data extents */
86 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
88 /* orhpan objectid for tracking unlinked/truncated files */
89 #define BTRFS_ORPHAN_OBJECTID -5ULL
91 /* does write ahead logging to speed up fsyncs */
92 #define BTRFS_TREE_LOG_OBJECTID -6ULL
93 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
95 /* for space balancing */
96 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
97 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
100 * extent checksums all have this objectid
101 * this allows them to share the logging tree
104 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
106 /* For storing free space cache */
107 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
110 * The inode number assigned to the special inode for sotring
113 #define BTRFS_FREE_INO_OBJECTID -12ULL
115 /* dummy objectid represents multiple objectids */
116 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
119 * All files have objectids in this range.
121 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
122 #define BTRFS_LAST_FREE_OBJECTID -256ULL
123 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
127 * the device items go into the chunk tree. The key is in the form
128 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
130 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
132 #define BTRFS_BTREE_INODE_OBJECTID 1
134 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
137 * we can actually store much bigger names, but lets not confuse the rest
140 #define BTRFS_NAME_LEN 255
142 /* 32 bytes in various csum fields */
143 #define BTRFS_CSUM_SIZE 32
146 #define BTRFS_CSUM_TYPE_CRC32 0
148 static int btrfs_csum_sizes[] = { 4, 0 };
150 /* four bytes for CRC32 */
151 #define BTRFS_EMPTY_DIR_SIZE 0
153 #define BTRFS_FT_UNKNOWN 0
154 #define BTRFS_FT_REG_FILE 1
155 #define BTRFS_FT_DIR 2
156 #define BTRFS_FT_CHRDEV 3
157 #define BTRFS_FT_BLKDEV 4
158 #define BTRFS_FT_FIFO 5
159 #define BTRFS_FT_SOCK 6
160 #define BTRFS_FT_SYMLINK 7
161 #define BTRFS_FT_XATTR 8
162 #define BTRFS_FT_MAX 9
165 * The key defines the order in the tree, and so it also defines (optimal)
168 * objectid corresponds to the inode number.
170 * type tells us things about the object, and is a kind of stream selector.
171 * so for a given inode, keys with type of 1 might refer to the inode data,
172 * type of 2 may point to file data in the btree and type == 3 may point to
175 * offset is the starting byte offset for this key in the stream.
177 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
178 * in cpu native order. Otherwise they are identical and their sizes
179 * should be the same (ie both packed)
181 struct btrfs_disk_key {
185 } __attribute__ ((__packed__));
191 } __attribute__ ((__packed__));
193 struct btrfs_mapping_tree {
194 struct extent_map_tree map_tree;
197 struct btrfs_dev_item {
198 /* the internal btrfs device id */
201 /* size of the device */
207 /* optimal io alignment for this device */
210 /* optimal io width for this device */
213 /* minimal io size for this device */
216 /* type and info about this device */
219 /* expected generation for this device */
223 * starting byte of this partition on the device,
224 * to allow for stripe alignment in the future
228 /* grouping information for allocation decisions */
231 /* seek speed 0-100 where 100 is fastest */
234 /* bandwidth 0-100 where 100 is fastest */
237 /* btrfs generated uuid for this device */
238 u8 uuid[BTRFS_UUID_SIZE];
240 /* uuid of FS who owns this device */
241 u8 fsid[BTRFS_UUID_SIZE];
242 } __attribute__ ((__packed__));
244 struct btrfs_stripe {
247 u8 dev_uuid[BTRFS_UUID_SIZE];
248 } __attribute__ ((__packed__));
251 /* size of this chunk in bytes */
254 /* objectid of the root referencing this chunk */
260 /* optimal io alignment for this chunk */
263 /* optimal io width for this chunk */
266 /* minimal io size for this chunk */
269 /* 2^16 stripes is quite a lot, a second limit is the size of a single
274 /* sub stripes only matter for raid10 */
276 struct btrfs_stripe stripe;
277 /* additional stripes go here */
278 } __attribute__ ((__packed__));
280 #define BTRFS_FREE_SPACE_EXTENT 1
281 #define BTRFS_FREE_SPACE_BITMAP 2
283 struct btrfs_free_space_entry {
287 } __attribute__ ((__packed__));
289 struct btrfs_free_space_header {
290 struct btrfs_disk_key location;
294 } __attribute__ ((__packed__));
296 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
298 BUG_ON(num_stripes == 0);
299 return sizeof(struct btrfs_chunk) +
300 sizeof(struct btrfs_stripe) * (num_stripes - 1);
303 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
304 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
310 /* Errors detected */
311 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
313 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
314 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
316 #define BTRFS_BACKREF_REV_MAX 256
317 #define BTRFS_BACKREF_REV_SHIFT 56
318 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
319 BTRFS_BACKREF_REV_SHIFT)
321 #define BTRFS_OLD_BACKREF_REV 0
322 #define BTRFS_MIXED_BACKREF_REV 1
325 * every tree block (leaf or node) starts with this header.
327 struct btrfs_header {
328 /* these first four must match the super block */
329 u8 csum[BTRFS_CSUM_SIZE];
330 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
331 __le64 bytenr; /* which block this node is supposed to live in */
334 /* allowed to be different from the super from here on down */
335 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
340 } __attribute__ ((__packed__));
342 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
343 sizeof(struct btrfs_header)) / \
344 sizeof(struct btrfs_key_ptr))
345 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
346 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
347 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
348 sizeof(struct btrfs_item) - \
349 sizeof(struct btrfs_file_extent_item))
350 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
351 sizeof(struct btrfs_item) -\
352 sizeof(struct btrfs_dir_item))
356 * this is a very generous portion of the super block, giving us
357 * room to translate 14 chunks with 3 stripes each.
359 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
360 #define BTRFS_LABEL_SIZE 256
363 * the super block basically lists the main trees of the FS
364 * it currently lacks any block count etc etc
366 struct btrfs_super_block {
367 u8 csum[BTRFS_CSUM_SIZE];
368 /* the first 4 fields must match struct btrfs_header */
369 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
370 __le64 bytenr; /* this block number */
373 /* allowed to be different from the btrfs_header from here own down */
380 /* this will help find the new super based on the log root */
381 __le64 log_root_transid;
384 __le64 root_dir_objectid;
390 __le32 sys_chunk_array_size;
391 __le64 chunk_root_generation;
393 __le64 compat_ro_flags;
394 __le64 incompat_flags;
399 struct btrfs_dev_item dev_item;
401 char label[BTRFS_LABEL_SIZE];
403 __le64 cache_generation;
405 /* future expansion */
407 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
408 } __attribute__ ((__packed__));
411 * Compat flags that we support. If any incompat flags are set other than the
412 * ones specified below then we will fail to mount
414 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
415 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
416 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
417 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
419 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
420 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
421 #define BTRFS_FEATURE_INCOMPAT_SUPP \
422 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
423 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
424 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
425 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
428 * A leaf is full of items. offset and size tell us where to find
429 * the item in the leaf (relative to the start of the data area)
432 struct btrfs_disk_key key;
435 } __attribute__ ((__packed__));
438 * leaves have an item area and a data area:
439 * [item0, item1....itemN] [free space] [dataN...data1, data0]
441 * The data is separate from the items to get the keys closer together
445 struct btrfs_header header;
446 struct btrfs_item items[];
447 } __attribute__ ((__packed__));
450 * all non-leaf blocks are nodes, they hold only keys and pointers to
453 struct btrfs_key_ptr {
454 struct btrfs_disk_key key;
457 } __attribute__ ((__packed__));
460 struct btrfs_header header;
461 struct btrfs_key_ptr ptrs[];
462 } __attribute__ ((__packed__));
465 * btrfs_paths remember the path taken from the root down to the leaf.
466 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
467 * to any other levels that are present.
469 * The slots array records the index of the item or block pointer
470 * used while walking the tree.
473 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
474 int slots[BTRFS_MAX_LEVEL];
475 /* if there is real range locking, this locks field will change */
476 int locks[BTRFS_MAX_LEVEL];
478 /* keep some upper locks as we walk down */
482 * set by btrfs_split_item, tells search_slot to keep all locks
483 * and to force calls to keep space in the nodes
485 unsigned int search_for_split:1;
486 unsigned int keep_locks:1;
487 unsigned int skip_locking:1;
488 unsigned int leave_spinning:1;
489 unsigned int search_commit_root:1;
493 * items in the extent btree are used to record the objectid of the
494 * owner of the block and the number of references
497 struct btrfs_extent_item {
501 } __attribute__ ((__packed__));
503 struct btrfs_extent_item_v0 {
505 } __attribute__ ((__packed__));
507 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
508 sizeof(struct btrfs_item))
510 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
511 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
513 /* following flags only apply to tree blocks */
515 /* use full backrefs for extent pointers in the block */
516 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
519 * this flag is only used internally by scrub and may be changed at any time
520 * it is only declared here to avoid collisions
522 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
524 struct btrfs_tree_block_info {
525 struct btrfs_disk_key key;
527 } __attribute__ ((__packed__));
529 struct btrfs_extent_data_ref {
534 } __attribute__ ((__packed__));
536 struct btrfs_shared_data_ref {
538 } __attribute__ ((__packed__));
540 struct btrfs_extent_inline_ref {
543 } __attribute__ ((__packed__));
545 /* old style backrefs item */
546 struct btrfs_extent_ref_v0 {
551 } __attribute__ ((__packed__));
554 /* dev extents record free space on individual devices. The owner
555 * field points back to the chunk allocation mapping tree that allocated
556 * the extent. The chunk tree uuid field is a way to double check the owner
558 struct btrfs_dev_extent {
560 __le64 chunk_objectid;
563 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
564 } __attribute__ ((__packed__));
566 struct btrfs_inode_ref {
570 } __attribute__ ((__packed__));
572 struct btrfs_timespec {
575 } __attribute__ ((__packed__));
577 enum btrfs_compression_type {
578 BTRFS_COMPRESS_NONE = 0,
579 BTRFS_COMPRESS_ZLIB = 1,
580 BTRFS_COMPRESS_LZO = 2,
581 BTRFS_COMPRESS_TYPES = 2,
582 BTRFS_COMPRESS_LAST = 3,
585 struct btrfs_inode_item {
586 /* nfs style generation number */
588 /* transid that last touched this inode */
600 /* modification sequence number for NFS */
604 * a little future expansion, for more than this we can
605 * just grow the inode item and version it
608 struct btrfs_timespec atime;
609 struct btrfs_timespec ctime;
610 struct btrfs_timespec mtime;
611 struct btrfs_timespec otime;
612 } __attribute__ ((__packed__));
614 struct btrfs_dir_log_item {
616 } __attribute__ ((__packed__));
618 struct btrfs_dir_item {
619 struct btrfs_disk_key location;
624 } __attribute__ ((__packed__));
626 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
628 struct btrfs_root_item {
629 struct btrfs_inode_item inode;
635 __le64 last_snapshot;
638 struct btrfs_disk_key drop_progress;
641 } __attribute__ ((__packed__));
644 * this is used for both forward and backward root refs
646 struct btrfs_root_ref {
650 } __attribute__ ((__packed__));
652 #define BTRFS_FILE_EXTENT_INLINE 0
653 #define BTRFS_FILE_EXTENT_REG 1
654 #define BTRFS_FILE_EXTENT_PREALLOC 2
656 struct btrfs_file_extent_item {
658 * transaction id that created this extent
662 * max number of bytes to hold this extent in ram
663 * when we split a compressed extent we can't know how big
664 * each of the resulting pieces will be. So, this is
665 * an upper limit on the size of the extent in ram instead of
671 * 32 bits for the various ways we might encode the data,
672 * including compression and encryption. If any of these
673 * are set to something a given disk format doesn't understand
674 * it is treated like an incompat flag for reading and writing,
679 __le16 other_encoding; /* spare for later use */
681 /* are we inline data or a real extent? */
685 * disk space consumed by the extent, checksum blocks are included
689 __le64 disk_num_bytes;
691 * the logical offset in file blocks (no csums)
692 * this extent record is for. This allows a file extent to point
693 * into the middle of an existing extent on disk, sharing it
694 * between two snapshots (useful if some bytes in the middle of the
695 * extent have changed
699 * the logical number of file blocks (no csums included). This
700 * always reflects the size uncompressed and without encoding.
704 } __attribute__ ((__packed__));
706 struct btrfs_csum_item {
708 } __attribute__ ((__packed__));
710 /* different types of block groups (and chunks) */
711 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
712 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
713 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
714 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
715 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
716 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
717 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
718 #define BTRFS_NR_RAID_TYPES 5
720 struct btrfs_block_group_item {
722 __le64 chunk_objectid;
724 } __attribute__ ((__packed__));
726 struct btrfs_space_info {
729 u64 total_bytes; /* total bytes in the space,
730 this doesn't take mirrors into account */
731 u64 bytes_used; /* total bytes used,
732 this doesn't take mirrors into account */
733 u64 bytes_pinned; /* total bytes pinned, will be freed when the
734 transaction finishes */
735 u64 bytes_reserved; /* total bytes the allocator has reserved for
736 current allocations */
737 u64 bytes_readonly; /* total bytes that are read only */
739 u64 bytes_may_use; /* number of bytes that may be used for
740 delalloc/allocations */
741 u64 disk_used; /* total bytes used on disk */
742 u64 disk_total; /* total bytes on disk, takes mirrors into
746 * we bump reservation progress every time we decrement
747 * bytes_reserved. This way people waiting for reservations
748 * know something good has happened and they can check
749 * for progress. The number here isn't to be trusted, it
750 * just shows reclaim activity
752 unsigned long reservation_progress;
754 unsigned int full:1; /* indicates that we cannot allocate any more
755 chunks for this space */
756 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
758 unsigned int flush:1; /* set if we are trying to make space */
760 unsigned int force_alloc; /* set if we need to force a chunk
761 alloc for this space */
763 struct list_head list;
765 /* for block groups in our same type */
766 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
768 struct rw_semaphore groups_sem;
769 wait_queue_head_t wait;
772 struct btrfs_block_rsv {
775 struct btrfs_space_info *space_info;
778 unsigned int priority:8;
779 unsigned int refill_used:1;
784 * free clusters are used to claim free space in relatively large chunks,
785 * allowing us to do less seeky writes. They are used for all metadata
786 * allocations and data allocations in ssd mode.
788 struct btrfs_free_cluster {
790 spinlock_t refill_lock;
793 /* largest extent in this cluster */
796 /* first extent starting offset */
799 struct btrfs_block_group_cache *block_group;
801 * when a cluster is allocated from a block group, we put the
802 * cluster onto a list in the block group so that it can
803 * be freed before the block group is freed.
805 struct list_head block_group_list;
808 enum btrfs_caching_type {
810 BTRFS_CACHE_STARTED = 1,
811 BTRFS_CACHE_FINISHED = 2,
814 enum btrfs_disk_cache_state {
815 BTRFS_DC_WRITTEN = 0,
819 BTRFS_DC_NEED_WRITE = 4,
822 struct btrfs_caching_control {
823 struct list_head list;
825 wait_queue_head_t wait;
826 struct btrfs_work work;
827 struct btrfs_block_group_cache *block_group;
832 struct btrfs_block_group_cache {
833 struct btrfs_key key;
834 struct btrfs_block_group_item item;
835 struct btrfs_fs_info *fs_info;
844 unsigned int dirty:1;
847 int disk_cache_state;
849 /* cache tracking stuff */
851 struct btrfs_caching_control *caching_ctl;
852 u64 last_byte_to_unpin;
854 struct btrfs_space_info *space_info;
856 /* free space cache stuff */
857 struct btrfs_free_space_ctl *free_space_ctl;
859 /* block group cache stuff */
860 struct rb_node cache_node;
862 /* for block groups in the same raid type */
863 struct list_head list;
868 /* List of struct btrfs_free_clusters for this block group.
869 * Today it will only have one thing on it, but that may change
871 struct list_head cluster_list;
874 struct reloc_control;
876 struct btrfs_fs_devices;
877 struct btrfs_delayed_root;
878 struct btrfs_fs_info {
879 u8 fsid[BTRFS_FSID_SIZE];
880 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
881 struct btrfs_root *extent_root;
882 struct btrfs_root *tree_root;
883 struct btrfs_root *chunk_root;
884 struct btrfs_root *dev_root;
885 struct btrfs_root *fs_root;
886 struct btrfs_root *csum_root;
888 /* the log root tree is a directory of all the other log roots */
889 struct btrfs_root *log_root_tree;
891 spinlock_t fs_roots_radix_lock;
892 struct radix_tree_root fs_roots_radix;
894 /* block group cache stuff */
895 spinlock_t block_group_cache_lock;
896 struct rb_root block_group_cache_tree;
898 struct extent_io_tree freed_extents[2];
899 struct extent_io_tree *pinned_extents;
901 /* logical->physical extent mapping */
902 struct btrfs_mapping_tree mapping_tree;
905 * block reservation for extent, checksum, root tree and
906 * delayed dir index item
908 struct btrfs_block_rsv global_block_rsv;
909 /* block reservation for delay allocation */
910 struct btrfs_block_rsv delalloc_block_rsv;
911 /* block reservation for metadata operations */
912 struct btrfs_block_rsv trans_block_rsv;
913 /* block reservation for chunk tree */
914 struct btrfs_block_rsv chunk_block_rsv;
916 struct btrfs_block_rsv empty_block_rsv;
919 u64 last_trans_committed;
922 * this is updated to the current trans every time a full commit
923 * is required instead of the faster short fsync log commits
925 u64 last_trans_log_full_commit;
926 unsigned long mount_opt:20;
927 unsigned long compress_type:4;
930 struct btrfs_transaction *running_transaction;
931 wait_queue_head_t transaction_throttle;
932 wait_queue_head_t transaction_wait;
933 wait_queue_head_t transaction_blocked_wait;
934 wait_queue_head_t async_submit_wait;
936 struct btrfs_super_block super_copy;
937 struct btrfs_super_block super_for_commit;
938 struct block_device *__bdev;
939 struct super_block *sb;
940 struct inode *btree_inode;
941 struct backing_dev_info bdi;
942 struct mutex tree_log_mutex;
943 struct mutex transaction_kthread_mutex;
944 struct mutex cleaner_mutex;
945 struct mutex chunk_mutex;
946 struct mutex volume_mutex;
948 * this protects the ordered operations list only while we are
949 * processing all of the entries on it. This way we make
950 * sure the commit code doesn't find the list temporarily empty
951 * because another function happens to be doing non-waiting preflush
952 * before jumping into the main commit.
954 struct mutex ordered_operations_mutex;
955 struct rw_semaphore extent_commit_sem;
957 struct rw_semaphore cleanup_work_sem;
959 struct rw_semaphore subvol_sem;
960 struct srcu_struct subvol_srcu;
962 spinlock_t trans_lock;
964 * the reloc mutex goes with the trans lock, it is taken
965 * during commit to protect us from the relocation code
967 struct mutex reloc_mutex;
969 struct list_head trans_list;
970 struct list_head hashers;
971 struct list_head dead_roots;
972 struct list_head caching_block_groups;
974 spinlock_t delayed_iput_lock;
975 struct list_head delayed_iputs;
977 atomic_t nr_async_submits;
978 atomic_t async_submit_draining;
979 atomic_t nr_async_bios;
980 atomic_t async_delalloc_pages;
981 atomic_t open_ioctl_trans;
984 * this is used by the balancing code to wait for all the pending
987 spinlock_t ordered_extent_lock;
990 * all of the data=ordered extents pending writeback
991 * these can span multiple transactions and basically include
992 * every dirty data page that isn't from nodatacow
994 struct list_head ordered_extents;
997 * all of the inodes that have delalloc bytes. It is possible for
998 * this list to be empty even when there is still dirty data=ordered
999 * extents waiting to finish IO.
1001 struct list_head delalloc_inodes;
1004 * special rename and truncate targets that must be on disk before
1005 * we're allowed to commit. This is basically the ext3 style
1006 * data=ordered list.
1008 struct list_head ordered_operations;
1011 * there is a pool of worker threads for checksumming during writes
1012 * and a pool for checksumming after reads. This is because readers
1013 * can run with FS locks held, and the writers may be waiting for
1014 * those locks. We don't want ordering in the pending list to cause
1015 * deadlocks, and so the two are serviced separately.
1017 * A third pool does submit_bio to avoid deadlocking with the other
1020 struct btrfs_workers generic_worker;
1021 struct btrfs_workers workers;
1022 struct btrfs_workers delalloc_workers;
1023 struct btrfs_workers endio_workers;
1024 struct btrfs_workers endio_meta_workers;
1025 struct btrfs_workers endio_meta_write_workers;
1026 struct btrfs_workers endio_write_workers;
1027 struct btrfs_workers endio_freespace_worker;
1028 struct btrfs_workers submit_workers;
1029 struct btrfs_workers caching_workers;
1032 * fixup workers take dirty pages that didn't properly go through
1033 * the cow mechanism and make them safe to write. It happens
1034 * for the sys_munmap function call path
1036 struct btrfs_workers fixup_workers;
1037 struct btrfs_workers delayed_workers;
1038 struct task_struct *transaction_kthread;
1039 struct task_struct *cleaner_kthread;
1040 int thread_pool_size;
1042 struct kobject super_kobj;
1043 struct completion kobj_unregister;
1046 int log_root_recovering;
1052 /* protected by the delalloc lock, used to keep from writing
1053 * metadata until there is a nice batch
1055 u64 dirty_metadata_bytes;
1056 struct list_head dirty_cowonly_roots;
1058 struct btrfs_fs_devices *fs_devices;
1061 * the space_info list is almost entirely read only. It only changes
1062 * when we add a new raid type to the FS, and that happens
1063 * very rarely. RCU is used to protect it.
1065 struct list_head space_info;
1067 struct reloc_control *reloc_ctl;
1069 spinlock_t delalloc_lock;
1072 /* data_alloc_cluster is only used in ssd mode */
1073 struct btrfs_free_cluster data_alloc_cluster;
1075 /* all metadata allocations go through this cluster */
1076 struct btrfs_free_cluster meta_alloc_cluster;
1078 /* auto defrag inodes go here */
1079 spinlock_t defrag_inodes_lock;
1080 struct rb_root defrag_inodes;
1081 atomic_t defrag_running;
1083 spinlock_t ref_cache_lock;
1084 u64 total_ref_cache_size;
1086 u64 avail_data_alloc_bits;
1087 u64 avail_metadata_alloc_bits;
1088 u64 avail_system_alloc_bits;
1089 u64 data_alloc_profile;
1090 u64 metadata_alloc_profile;
1091 u64 system_alloc_profile;
1093 unsigned data_chunk_allocations;
1094 unsigned metadata_ratio;
1098 /* private scrub information */
1099 struct mutex scrub_lock;
1100 atomic_t scrubs_running;
1101 atomic_t scrub_pause_req;
1102 atomic_t scrubs_paused;
1103 atomic_t scrub_cancel_req;
1104 wait_queue_head_t scrub_pause_wait;
1105 struct rw_semaphore scrub_super_lock;
1106 int scrub_workers_refcnt;
1107 struct btrfs_workers scrub_workers;
1109 /* filesystem state */
1112 struct btrfs_delayed_root *delayed_root;
1116 * in ram representation of the tree. extent_root is used for all allocations
1117 * and for the extent tree extent_root root.
1120 struct extent_buffer *node;
1122 struct extent_buffer *commit_root;
1123 struct btrfs_root *log_root;
1124 struct btrfs_root *reloc_root;
1126 struct btrfs_root_item root_item;
1127 struct btrfs_key root_key;
1128 struct btrfs_fs_info *fs_info;
1129 struct extent_io_tree dirty_log_pages;
1131 struct kobject root_kobj;
1132 struct completion kobj_unregister;
1133 struct mutex objectid_mutex;
1135 spinlock_t accounting_lock;
1136 struct btrfs_block_rsv *block_rsv;
1138 /* free ino cache stuff */
1139 struct mutex fs_commit_mutex;
1140 struct btrfs_free_space_ctl *free_ino_ctl;
1141 enum btrfs_caching_type cached;
1142 spinlock_t cache_lock;
1143 wait_queue_head_t cache_wait;
1144 struct btrfs_free_space_ctl *free_ino_pinned;
1146 struct inode *cache_inode;
1148 struct mutex log_mutex;
1149 wait_queue_head_t log_writer_wait;
1150 wait_queue_head_t log_commit_wait[2];
1151 atomic_t log_writers;
1152 atomic_t log_commit[2];
1153 unsigned long log_transid;
1154 unsigned long last_log_commit;
1155 unsigned long log_batch;
1156 pid_t log_start_pid;
1157 bool log_multiple_pids;
1162 /* data allocations are done in sectorsize units */
1165 /* node allocations are done in nodesize units */
1168 /* leaf allocations are done in leafsize units */
1175 u64 highest_objectid;
1177 /* btrfs_record_root_in_trans is a multi-step process,
1178 * and it can race with the balancing code. But the
1179 * race is very small, and only the first time the root
1180 * is added to each transaction. So in_trans_setup
1181 * is used to tell us when more checks are required
1183 unsigned long in_trans_setup;
1188 u64 defrag_trans_start;
1189 struct btrfs_key defrag_progress;
1190 struct btrfs_key defrag_max;
1194 /* the dirty list is only used by non-reference counted roots */
1195 struct list_head dirty_list;
1197 struct list_head root_list;
1199 spinlock_t orphan_lock;
1200 struct list_head orphan_list;
1201 struct btrfs_block_rsv *orphan_block_rsv;
1202 int orphan_item_inserted;
1203 int orphan_cleanup_state;
1205 spinlock_t inode_lock;
1206 /* red-black tree that keeps track of in-memory inodes */
1207 struct rb_root inode_tree;
1210 * radix tree that keeps track of delayed nodes of every inode,
1211 * protected by inode_lock
1213 struct radix_tree_root delayed_nodes_tree;
1215 * right now this just gets used so that a root has its own devid
1216 * for stat. It may be used for more later
1221 struct btrfs_ioctl_defrag_range_args {
1222 /* start of the defrag operation */
1225 /* number of bytes to defrag, use (u64)-1 to say all */
1229 * flags for the operation, which can include turning
1230 * on compression for this one defrag
1235 * any extent bigger than this will be considered
1236 * already defragged. Use 0 to take the kernel default
1237 * Use 1 to say every single extent must be rewritten
1239 __u32 extent_thresh;
1242 * which compression method to use if turning on compression
1243 * for this defrag operation. If unspecified, zlib will
1246 __u32 compress_type;
1248 /* spare for later */
1254 * inode items have the data typically returned from stat and store other
1255 * info about object characteristics. There is one for every file and dir in
1258 #define BTRFS_INODE_ITEM_KEY 1
1259 #define BTRFS_INODE_REF_KEY 12
1260 #define BTRFS_XATTR_ITEM_KEY 24
1261 #define BTRFS_ORPHAN_ITEM_KEY 48
1262 /* reserve 2-15 close to the inode for later flexibility */
1265 * dir items are the name -> inode pointers in a directory. There is one
1266 * for every name in a directory.
1268 #define BTRFS_DIR_LOG_ITEM_KEY 60
1269 #define BTRFS_DIR_LOG_INDEX_KEY 72
1270 #define BTRFS_DIR_ITEM_KEY 84
1271 #define BTRFS_DIR_INDEX_KEY 96
1273 * extent data is for file data
1275 #define BTRFS_EXTENT_DATA_KEY 108
1278 * extent csums are stored in a separate tree and hold csums for
1279 * an entire extent on disk.
1281 #define BTRFS_EXTENT_CSUM_KEY 128
1284 * root items point to tree roots. They are typically in the root
1285 * tree used by the super block to find all the other trees
1287 #define BTRFS_ROOT_ITEM_KEY 132
1290 * root backrefs tie subvols and snapshots to the directory entries that
1293 #define BTRFS_ROOT_BACKREF_KEY 144
1296 * root refs make a fast index for listing all of the snapshots and
1297 * subvolumes referenced by a given root. They point directly to the
1298 * directory item in the root that references the subvol
1300 #define BTRFS_ROOT_REF_KEY 156
1303 * extent items are in the extent map tree. These record which blocks
1304 * are used, and how many references there are to each block
1306 #define BTRFS_EXTENT_ITEM_KEY 168
1308 #define BTRFS_TREE_BLOCK_REF_KEY 176
1310 #define BTRFS_EXTENT_DATA_REF_KEY 178
1312 #define BTRFS_EXTENT_REF_V0_KEY 180
1314 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1316 #define BTRFS_SHARED_DATA_REF_KEY 184
1319 * block groups give us hints into the extent allocation trees. Which
1320 * blocks are free etc etc
1322 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1324 #define BTRFS_DEV_EXTENT_KEY 204
1325 #define BTRFS_DEV_ITEM_KEY 216
1326 #define BTRFS_CHUNK_ITEM_KEY 228
1329 * string items are for debugging. They just store a short string of
1332 #define BTRFS_STRING_ITEM_KEY 253
1335 * Flags for mount options.
1337 * Note: don't forget to add new options to btrfs_show_options()
1339 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1340 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1341 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1342 #define BTRFS_MOUNT_SSD (1 << 3)
1343 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1344 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1345 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1346 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1347 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1348 #define BTRFS_MOUNT_NOSSD (1 << 9)
1349 #define BTRFS_MOUNT_DISCARD (1 << 10)
1350 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1351 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1352 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1353 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1354 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1355 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1356 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1358 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1359 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1360 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1365 #define BTRFS_INODE_NODATASUM (1 << 0)
1366 #define BTRFS_INODE_NODATACOW (1 << 1)
1367 #define BTRFS_INODE_READONLY (1 << 2)
1368 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1369 #define BTRFS_INODE_PREALLOC (1 << 4)
1370 #define BTRFS_INODE_SYNC (1 << 5)
1371 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1372 #define BTRFS_INODE_APPEND (1 << 7)
1373 #define BTRFS_INODE_NODUMP (1 << 8)
1374 #define BTRFS_INODE_NOATIME (1 << 9)
1375 #define BTRFS_INODE_DIRSYNC (1 << 10)
1376 #define BTRFS_INODE_COMPRESS (1 << 11)
1378 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1380 /* some macros to generate set/get funcs for the struct fields. This
1381 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1384 #define le8_to_cpu(v) (v)
1385 #define cpu_to_le8(v) (v)
1388 #define read_eb_member(eb, ptr, type, member, result) ( \
1389 read_extent_buffer(eb, (char *)(result), \
1390 ((unsigned long)(ptr)) + \
1391 offsetof(type, member), \
1392 sizeof(((type *)0)->member)))
1394 #define write_eb_member(eb, ptr, type, member, result) ( \
1395 write_extent_buffer(eb, (char *)(result), \
1396 ((unsigned long)(ptr)) + \
1397 offsetof(type, member), \
1398 sizeof(((type *)0)->member)))
1400 #ifndef BTRFS_SETGET_FUNCS
1401 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1402 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1403 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1406 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1407 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1409 type *p = page_address(eb->first_page); \
1410 u##bits res = le##bits##_to_cpu(p->member); \
1413 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1416 type *p = page_address(eb->first_page); \
1417 p->member = cpu_to_le##bits(val); \
1420 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1421 static inline u##bits btrfs_##name(type *s) \
1423 return le##bits##_to_cpu(s->member); \
1425 static inline void btrfs_set_##name(type *s, u##bits val) \
1427 s->member = cpu_to_le##bits(val); \
1430 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1431 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1432 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1433 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1434 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1435 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1437 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1438 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1439 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1440 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1441 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1442 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1444 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1445 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1447 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1449 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1451 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1453 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1455 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1456 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1458 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1460 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1465 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1467 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1470 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1472 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1475 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1476 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1477 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1478 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1479 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1480 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1481 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1482 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1483 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1484 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1485 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1487 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1489 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1492 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1493 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1494 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1496 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1498 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1500 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1502 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1503 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1505 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1507 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1508 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1510 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1513 unsigned long offset = (unsigned long)c;
1514 offset += offsetof(struct btrfs_chunk, stripe);
1515 offset += nr * sizeof(struct btrfs_stripe);
1516 return (struct btrfs_stripe *)offset;
1519 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1521 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1524 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1525 struct btrfs_chunk *c, int nr)
1527 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1530 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1531 struct btrfs_chunk *c, int nr)
1533 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1536 /* struct btrfs_block_group_item */
1537 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1539 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1541 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1542 struct btrfs_block_group_item, chunk_objectid, 64);
1544 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1545 struct btrfs_block_group_item, chunk_objectid, 64);
1546 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1547 struct btrfs_block_group_item, flags, 64);
1548 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1549 struct btrfs_block_group_item, flags, 64);
1551 /* struct btrfs_inode_ref */
1552 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1553 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1555 /* struct btrfs_inode_item */
1556 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1557 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1558 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1559 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1560 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1561 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1562 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1563 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1564 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1565 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1566 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1567 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1569 static inline struct btrfs_timespec *
1570 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1572 unsigned long ptr = (unsigned long)inode_item;
1573 ptr += offsetof(struct btrfs_inode_item, atime);
1574 return (struct btrfs_timespec *)ptr;
1577 static inline struct btrfs_timespec *
1578 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1580 unsigned long ptr = (unsigned long)inode_item;
1581 ptr += offsetof(struct btrfs_inode_item, mtime);
1582 return (struct btrfs_timespec *)ptr;
1585 static inline struct btrfs_timespec *
1586 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1588 unsigned long ptr = (unsigned long)inode_item;
1589 ptr += offsetof(struct btrfs_inode_item, ctime);
1590 return (struct btrfs_timespec *)ptr;
1593 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1594 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1596 /* struct btrfs_dev_extent */
1597 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1599 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1600 chunk_objectid, 64);
1601 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1603 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1605 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1607 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1608 return (u8 *)((unsigned long)dev + ptr);
1611 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1612 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1614 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1616 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1619 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1621 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1622 struct btrfs_tree_block_info *item,
1623 struct btrfs_disk_key *key)
1625 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1628 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1629 struct btrfs_tree_block_info *item,
1630 struct btrfs_disk_key *key)
1632 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1635 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1637 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1639 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1641 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1644 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1647 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1649 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1652 static inline u32 btrfs_extent_inline_ref_size(int type)
1654 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1655 type == BTRFS_SHARED_BLOCK_REF_KEY)
1656 return sizeof(struct btrfs_extent_inline_ref);
1657 if (type == BTRFS_SHARED_DATA_REF_KEY)
1658 return sizeof(struct btrfs_shared_data_ref) +
1659 sizeof(struct btrfs_extent_inline_ref);
1660 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1661 return sizeof(struct btrfs_extent_data_ref) +
1662 offsetof(struct btrfs_extent_inline_ref, offset);
1667 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1668 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1670 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1671 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1673 /* struct btrfs_node */
1674 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1675 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1677 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1680 ptr = offsetof(struct btrfs_node, ptrs) +
1681 sizeof(struct btrfs_key_ptr) * nr;
1682 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1685 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1689 ptr = offsetof(struct btrfs_node, ptrs) +
1690 sizeof(struct btrfs_key_ptr) * nr;
1691 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1694 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1697 ptr = offsetof(struct btrfs_node, ptrs) +
1698 sizeof(struct btrfs_key_ptr) * nr;
1699 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1702 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1706 ptr = offsetof(struct btrfs_node, ptrs) +
1707 sizeof(struct btrfs_key_ptr) * nr;
1708 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1711 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1713 return offsetof(struct btrfs_node, ptrs) +
1714 sizeof(struct btrfs_key_ptr) * nr;
1717 void btrfs_node_key(struct extent_buffer *eb,
1718 struct btrfs_disk_key *disk_key, int nr);
1720 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1721 struct btrfs_disk_key *disk_key, int nr)
1724 ptr = btrfs_node_key_ptr_offset(nr);
1725 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1726 struct btrfs_key_ptr, key, disk_key);
1729 /* struct btrfs_item */
1730 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1731 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1733 static inline unsigned long btrfs_item_nr_offset(int nr)
1735 return offsetof(struct btrfs_leaf, items) +
1736 sizeof(struct btrfs_item) * nr;
1739 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1742 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1745 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1746 struct btrfs_item *item)
1748 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1751 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1753 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1756 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1758 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1761 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1763 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1766 static inline void btrfs_item_key(struct extent_buffer *eb,
1767 struct btrfs_disk_key *disk_key, int nr)
1769 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1770 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1773 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1774 struct btrfs_disk_key *disk_key, int nr)
1776 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1777 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1780 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1783 * struct btrfs_root_ref
1785 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1786 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1787 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1789 /* struct btrfs_dir_item */
1790 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1791 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1792 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1793 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1795 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1796 struct btrfs_dir_item *item,
1797 struct btrfs_disk_key *key)
1799 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1802 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1803 struct btrfs_dir_item *item,
1804 struct btrfs_disk_key *key)
1806 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1809 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1811 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1813 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1816 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1817 struct btrfs_free_space_header *h,
1818 struct btrfs_disk_key *key)
1820 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1823 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1824 struct btrfs_free_space_header *h,
1825 struct btrfs_disk_key *key)
1827 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1830 /* struct btrfs_disk_key */
1831 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1833 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1834 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1836 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1837 struct btrfs_disk_key *disk)
1839 cpu->offset = le64_to_cpu(disk->offset);
1840 cpu->type = disk->type;
1841 cpu->objectid = le64_to_cpu(disk->objectid);
1844 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1845 struct btrfs_key *cpu)
1847 disk->offset = cpu_to_le64(cpu->offset);
1848 disk->type = cpu->type;
1849 disk->objectid = cpu_to_le64(cpu->objectid);
1852 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1853 struct btrfs_key *key, int nr)
1855 struct btrfs_disk_key disk_key;
1856 btrfs_node_key(eb, &disk_key, nr);
1857 btrfs_disk_key_to_cpu(key, &disk_key);
1860 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1861 struct btrfs_key *key, int nr)
1863 struct btrfs_disk_key disk_key;
1864 btrfs_item_key(eb, &disk_key, nr);
1865 btrfs_disk_key_to_cpu(key, &disk_key);
1868 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1869 struct btrfs_dir_item *item,
1870 struct btrfs_key *key)
1872 struct btrfs_disk_key disk_key;
1873 btrfs_dir_item_key(eb, item, &disk_key);
1874 btrfs_disk_key_to_cpu(key, &disk_key);
1878 static inline u8 btrfs_key_type(struct btrfs_key *key)
1883 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1888 /* struct btrfs_header */
1889 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1890 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1892 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1893 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1894 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1895 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1897 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1899 return (btrfs_header_flags(eb) & flag) == flag;
1902 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1904 u64 flags = btrfs_header_flags(eb);
1905 btrfs_set_header_flags(eb, flags | flag);
1906 return (flags & flag) == flag;
1909 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1911 u64 flags = btrfs_header_flags(eb);
1912 btrfs_set_header_flags(eb, flags & ~flag);
1913 return (flags & flag) == flag;
1916 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1918 u64 flags = btrfs_header_flags(eb);
1919 return flags >> BTRFS_BACKREF_REV_SHIFT;
1922 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1925 u64 flags = btrfs_header_flags(eb);
1926 flags &= ~BTRFS_BACKREF_REV_MASK;
1927 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1928 btrfs_set_header_flags(eb, flags);
1931 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1933 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1937 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1939 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1943 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1945 return btrfs_header_level(eb) == 0;
1948 /* struct btrfs_root_item */
1949 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1951 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1952 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1953 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1955 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1957 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1958 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1959 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1960 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1961 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1962 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1963 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1964 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1967 static inline bool btrfs_root_readonly(struct btrfs_root *root)
1969 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
1972 /* struct btrfs_super_block */
1974 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1975 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1976 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1978 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1979 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1980 struct btrfs_super_block, sys_chunk_array_size, 32);
1981 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1982 struct btrfs_super_block, chunk_root_generation, 64);
1983 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1985 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1987 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1988 chunk_root_level, 8);
1989 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1991 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1992 log_root_transid, 64);
1993 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1995 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1997 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1999 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2001 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2003 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2005 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2007 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2008 root_dir_objectid, 64);
2009 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2011 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2013 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2014 compat_ro_flags, 64);
2015 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2016 incompat_flags, 64);
2017 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2019 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2020 cache_generation, 64);
2022 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2024 int t = btrfs_super_csum_type(s);
2025 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2026 return btrfs_csum_sizes[t];
2029 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2031 return offsetof(struct btrfs_leaf, items);
2034 /* struct btrfs_file_extent_item */
2035 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2037 static inline unsigned long
2038 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2040 unsigned long offset = (unsigned long)e;
2041 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2045 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2047 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2050 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2052 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2054 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2055 disk_num_bytes, 64);
2056 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2058 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2060 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2062 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2064 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2066 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2067 other_encoding, 16);
2069 /* this returns the number of file bytes represented by the inline item.
2070 * If an item is compressed, this is the uncompressed size
2072 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2073 struct btrfs_file_extent_item *e)
2075 return btrfs_file_extent_ram_bytes(eb, e);
2079 * this returns the number of bytes used by the item on disk, minus the
2080 * size of any extent headers. If a file is compressed on disk, this is
2081 * the compressed size
2083 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2084 struct btrfs_item *e)
2086 unsigned long offset;
2087 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2088 return btrfs_item_size(eb, e) - offset;
2091 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2093 return sb->s_fs_info;
2096 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2099 return root->leafsize;
2100 return root->nodesize;
2103 /* helper function to cast into the data area of the leaf. */
2104 #define btrfs_item_ptr(leaf, slot, type) \
2105 ((type *)(btrfs_leaf_data(leaf) + \
2106 btrfs_item_offset_nr(leaf, slot)))
2108 #define btrfs_item_ptr_offset(leaf, slot) \
2109 ((unsigned long)(btrfs_leaf_data(leaf) + \
2110 btrfs_item_offset_nr(leaf, slot)))
2112 static inline struct dentry *fdentry(struct file *file)
2114 return file->f_path.dentry;
2117 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2119 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2120 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2124 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2127 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2131 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2132 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2133 struct btrfs_root *root, unsigned long count);
2134 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2135 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2136 struct btrfs_root *root, u64 bytenr,
2137 u64 num_bytes, u64 *refs, u64 *flags);
2138 int btrfs_pin_extent(struct btrfs_root *root,
2139 u64 bytenr, u64 num, int reserved);
2140 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2141 struct btrfs_root *root,
2142 u64 objectid, u64 offset, u64 bytenr);
2143 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2144 struct btrfs_fs_info *info,
2146 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2147 u64 btrfs_find_block_group(struct btrfs_root *root,
2148 u64 search_start, u64 search_hint, int owner);
2149 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2150 struct btrfs_root *root, u32 blocksize,
2151 u64 parent, u64 root_objectid,
2152 struct btrfs_disk_key *key, int level,
2153 u64 hint, u64 empty_size);
2154 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2155 struct btrfs_root *root,
2156 struct extent_buffer *buf,
2157 u64 parent, int last_ref);
2158 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2159 struct btrfs_root *root,
2160 u64 bytenr, u32 blocksize,
2162 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2163 struct btrfs_root *root,
2164 u64 root_objectid, u64 owner,
2165 u64 offset, struct btrfs_key *ins);
2166 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2167 struct btrfs_root *root,
2168 u64 root_objectid, u64 owner, u64 offset,
2169 struct btrfs_key *ins);
2170 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2171 struct btrfs_root *root,
2172 u64 num_bytes, u64 min_alloc_size,
2173 u64 empty_size, u64 hint_byte,
2174 u64 search_end, struct btrfs_key *ins,
2176 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2177 struct extent_buffer *buf, int full_backref);
2178 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2179 struct extent_buffer *buf, int full_backref);
2180 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2181 struct btrfs_root *root,
2182 u64 bytenr, u64 num_bytes, u64 flags,
2184 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2185 struct btrfs_root *root,
2186 u64 bytenr, u64 num_bytes, u64 parent,
2187 u64 root_objectid, u64 owner, u64 offset);
2189 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2190 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2191 struct btrfs_root *root);
2192 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2193 struct btrfs_root *root);
2194 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2195 struct btrfs_root *root,
2196 u64 bytenr, u64 num_bytes, u64 parent,
2197 u64 root_objectid, u64 owner, u64 offset);
2199 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2200 struct btrfs_root *root);
2201 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2202 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2203 int btrfs_read_block_groups(struct btrfs_root *root);
2204 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2205 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2206 struct btrfs_root *root, u64 bytes_used,
2207 u64 type, u64 chunk_objectid, u64 chunk_offset,
2209 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root, u64 group_start);
2211 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2212 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2213 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2214 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2215 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2216 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2217 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2218 struct btrfs_root *root);
2219 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2220 struct inode *inode);
2221 void btrfs_orphan_release_metadata(struct inode *inode);
2222 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2223 struct btrfs_pending_snapshot *pending);
2224 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2225 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2226 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2227 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2228 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2229 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2230 void btrfs_free_block_rsv(struct btrfs_root *root,
2231 struct btrfs_block_rsv *rsv);
2232 int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2233 struct btrfs_root *root,
2234 struct btrfs_block_rsv *block_rsv,
2236 int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2237 struct btrfs_root *root,
2238 struct btrfs_block_rsv *block_rsv,
2239 u64 min_reserved, int min_factor);
2240 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2241 struct btrfs_block_rsv *dst_rsv,
2243 void btrfs_block_rsv_release(struct btrfs_root *root,
2244 struct btrfs_block_rsv *block_rsv,
2246 int btrfs_truncate_reserve_metadata(struct btrfs_trans_handle *trans,
2247 struct btrfs_root *root,
2248 struct btrfs_block_rsv *rsv);
2249 int btrfs_set_block_group_ro(struct btrfs_root *root,
2250 struct btrfs_block_group_cache *cache);
2251 int btrfs_set_block_group_rw(struct btrfs_root *root,
2252 struct btrfs_block_group_cache *cache);
2253 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2254 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2255 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2256 u64 start, u64 end);
2257 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2258 u64 num_bytes, u64 *actual_bytes);
2259 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2260 struct btrfs_root *root, u64 type);
2261 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2263 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2265 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2266 int level, int *slot);
2267 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2268 int btrfs_previous_item(struct btrfs_root *root,
2269 struct btrfs_path *path, u64 min_objectid,
2271 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2272 struct btrfs_root *root, struct btrfs_path *path,
2273 struct btrfs_key *new_key);
2274 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2275 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2276 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2277 struct btrfs_key *key, int lowest_level,
2278 int cache_only, u64 min_trans);
2279 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2280 struct btrfs_key *max_key,
2281 struct btrfs_path *path, int cache_only,
2283 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2284 struct btrfs_root *root, struct extent_buffer *buf,
2285 struct extent_buffer *parent, int parent_slot,
2286 struct extent_buffer **cow_ret);
2287 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2288 struct btrfs_root *root,
2289 struct extent_buffer *buf,
2290 struct extent_buffer **cow_ret, u64 new_root_objectid);
2291 int btrfs_block_can_be_shared(struct btrfs_root *root,
2292 struct extent_buffer *buf);
2293 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2294 *root, struct btrfs_path *path, u32 data_size);
2295 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2296 struct btrfs_root *root,
2297 struct btrfs_path *path,
2298 u32 new_size, int from_end);
2299 int btrfs_split_item(struct btrfs_trans_handle *trans,
2300 struct btrfs_root *root,
2301 struct btrfs_path *path,
2302 struct btrfs_key *new_key,
2303 unsigned long split_offset);
2304 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2305 struct btrfs_root *root,
2306 struct btrfs_path *path,
2307 struct btrfs_key *new_key);
2308 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2309 *root, struct btrfs_key *key, struct btrfs_path *p, int
2311 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2312 struct btrfs_root *root, struct extent_buffer *parent,
2313 int start_slot, int cache_only, u64 *last_ret,
2314 struct btrfs_key *progress);
2315 void btrfs_release_path(struct btrfs_path *p);
2316 struct btrfs_path *btrfs_alloc_path(void);
2317 void btrfs_free_path(struct btrfs_path *p);
2318 void btrfs_set_path_blocking(struct btrfs_path *p);
2319 void btrfs_clear_path_blocking(struct btrfs_path *p,
2320 struct extent_buffer *held, int held_rw);
2321 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2323 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2324 struct btrfs_path *path, int slot, int nr);
2325 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2326 struct btrfs_root *root,
2327 struct btrfs_path *path)
2329 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2332 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2333 struct btrfs_root *root, struct btrfs_path *path,
2334 struct btrfs_key *cpu_key, u32 *data_size,
2335 u32 total_data, u32 total_size, int nr);
2336 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2337 *root, struct btrfs_key *key, void *data, u32 data_size);
2338 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2339 struct btrfs_root *root,
2340 struct btrfs_path *path,
2341 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2343 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2344 struct btrfs_root *root,
2345 struct btrfs_path *path,
2346 struct btrfs_key *key,
2349 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2352 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2353 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2354 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2355 void btrfs_drop_snapshot(struct btrfs_root *root,
2356 struct btrfs_block_rsv *block_rsv, int update_ref);
2357 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2358 struct btrfs_root *root,
2359 struct extent_buffer *node,
2360 struct extent_buffer *parent);
2361 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2364 * Get synced with close_ctree()
2367 return fs_info->closing;
2371 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2372 struct btrfs_path *path,
2373 u64 root_id, u64 ref_id);
2374 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2375 struct btrfs_root *tree_root,
2376 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2377 const char *name, int name_len);
2378 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2379 struct btrfs_root *tree_root,
2380 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2381 const char *name, int name_len);
2382 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2383 struct btrfs_key *key);
2384 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2385 *root, struct btrfs_key *key, struct btrfs_root_item
2387 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2388 *root, struct btrfs_key *key, struct btrfs_root_item
2390 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2391 btrfs_root_item *item, struct btrfs_key *key);
2392 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2393 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2394 void btrfs_set_root_node(struct btrfs_root_item *item,
2395 struct extent_buffer *node);
2396 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2399 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2400 struct btrfs_root *root, const char *name,
2401 int name_len, struct inode *dir,
2402 struct btrfs_key *location, u8 type, u64 index);
2403 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2404 struct btrfs_root *root,
2405 struct btrfs_path *path, u64 dir,
2406 const char *name, int name_len,
2408 struct btrfs_dir_item *
2409 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2410 struct btrfs_root *root,
2411 struct btrfs_path *path, u64 dir,
2412 u64 objectid, const char *name, int name_len,
2414 struct btrfs_dir_item *
2415 btrfs_search_dir_index_item(struct btrfs_root *root,
2416 struct btrfs_path *path, u64 dirid,
2417 const char *name, int name_len);
2418 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2419 struct btrfs_path *path,
2420 const char *name, int name_len);
2421 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2422 struct btrfs_root *root,
2423 struct btrfs_path *path,
2424 struct btrfs_dir_item *di);
2425 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2426 struct btrfs_root *root,
2427 struct btrfs_path *path, u64 objectid,
2428 const char *name, u16 name_len,
2429 const void *data, u16 data_len);
2430 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2431 struct btrfs_root *root,
2432 struct btrfs_path *path, u64 dir,
2433 const char *name, u16 name_len,
2435 int verify_dir_item(struct btrfs_root *root,
2436 struct extent_buffer *leaf,
2437 struct btrfs_dir_item *dir_item);
2440 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2441 struct btrfs_root *root, u64 offset);
2442 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root, u64 offset);
2444 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2447 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2448 struct btrfs_root *root,
2449 const char *name, int name_len,
2450 u64 inode_objectid, u64 ref_objectid, u64 index);
2451 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2452 struct btrfs_root *root,
2453 const char *name, int name_len,
2454 u64 inode_objectid, u64 ref_objectid, u64 *index);
2455 struct btrfs_inode_ref *
2456 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *root,
2458 struct btrfs_path *path,
2459 const char *name, int name_len,
2460 u64 inode_objectid, u64 ref_objectid, int mod);
2461 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2462 struct btrfs_root *root,
2463 struct btrfs_path *path, u64 objectid);
2464 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2465 *root, struct btrfs_path *path,
2466 struct btrfs_key *location, int mod);
2469 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2470 struct btrfs_root *root, u64 bytenr, u64 len);
2471 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2472 struct bio *bio, u32 *dst);
2473 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2474 struct bio *bio, u64 logical_offset, u32 *dst);
2475 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root,
2477 u64 objectid, u64 pos,
2478 u64 disk_offset, u64 disk_num_bytes,
2479 u64 num_bytes, u64 offset, u64 ram_bytes,
2480 u8 compression, u8 encryption, u16 other_encoding);
2481 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root,
2483 struct btrfs_path *path, u64 objectid,
2484 u64 bytenr, int mod);
2485 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root,
2487 struct btrfs_ordered_sum *sums);
2488 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2489 struct bio *bio, u64 file_start, int contig);
2490 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2491 struct btrfs_root *root,
2492 struct btrfs_path *path,
2493 u64 bytenr, int cow);
2494 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2495 struct btrfs_root *root, struct btrfs_path *path,
2497 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2498 struct list_head *list, int search_commit);
2500 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2501 size_t pg_offset, u64 start, u64 len,
2504 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2505 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2506 #define ClearPageChecked ClearPageFsMisc
2507 #define SetPageChecked SetPageFsMisc
2508 #define PageChecked PageFsMisc
2511 /* This forces readahead on a given range of bytes in an inode */
2512 static inline void btrfs_force_ra(struct address_space *mapping,
2513 struct file_ra_state *ra, struct file *file,
2514 pgoff_t offset, unsigned long req_size)
2516 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2519 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2520 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2521 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2522 struct btrfs_root *root,
2523 struct inode *dir, struct inode *inode,
2524 const char *name, int name_len);
2525 int btrfs_add_link(struct btrfs_trans_handle *trans,
2526 struct inode *parent_inode, struct inode *inode,
2527 const char *name, int name_len, int add_backref, u64 index);
2528 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2529 struct btrfs_root *root,
2530 struct inode *dir, u64 objectid,
2531 const char *name, int name_len);
2532 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2533 struct btrfs_root *root,
2534 struct inode *inode, u64 new_size,
2537 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2538 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2539 struct extent_state **cached_state);
2540 int btrfs_writepages(struct address_space *mapping,
2541 struct writeback_control *wbc);
2542 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2543 struct btrfs_root *new_root, u64 new_dirid);
2544 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2545 size_t size, struct bio *bio, unsigned long bio_flags);
2547 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2548 int btrfs_readpage(struct file *file, struct page *page);
2549 void btrfs_evict_inode(struct inode *inode);
2550 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2551 void btrfs_dirty_inode(struct inode *inode, int flags);
2552 struct inode *btrfs_alloc_inode(struct super_block *sb);
2553 void btrfs_destroy_inode(struct inode *inode);
2554 int btrfs_drop_inode(struct inode *inode);
2555 int btrfs_init_cachep(void);
2556 void btrfs_destroy_cachep(void);
2557 long btrfs_ioctl_trans_end(struct file *file);
2558 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2559 struct btrfs_root *root, int *was_new);
2560 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2561 size_t pg_offset, u64 start, u64 end,
2563 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2564 struct btrfs_root *root,
2565 struct inode *inode);
2566 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2567 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2568 int btrfs_orphan_cleanup(struct btrfs_root *root);
2569 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2570 struct btrfs_root *root);
2571 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2572 int btrfs_invalidate_inodes(struct btrfs_root *root);
2573 void btrfs_add_delayed_iput(struct inode *inode);
2574 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2575 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2576 u64 start, u64 num_bytes, u64 min_size,
2577 loff_t actual_len, u64 *alloc_hint);
2578 int btrfs_prealloc_file_range_trans(struct inode *inode,
2579 struct btrfs_trans_handle *trans, int mode,
2580 u64 start, u64 num_bytes, u64 min_size,
2581 loff_t actual_len, u64 *alloc_hint);
2582 extern const struct dentry_operations btrfs_dentry_operations;
2585 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2586 void btrfs_update_iflags(struct inode *inode);
2587 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2588 int btrfs_defrag_file(struct inode *inode, struct file *file,
2589 struct btrfs_ioctl_defrag_range_args *range,
2590 u64 newer_than, unsigned long max_pages);
2592 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2593 struct inode *inode);
2594 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2595 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2596 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2598 extern const struct file_operations btrfs_file_operations;
2599 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2600 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2601 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2602 struct inode *inode, u64 start, u64 end);
2603 int btrfs_release_file(struct inode *inode, struct file *file);
2604 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2605 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2606 struct page **pages, size_t num_pages,
2607 loff_t pos, size_t write_bytes,
2608 struct extent_state **cached);
2611 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2612 struct btrfs_root *root, int cache_only);
2615 int btrfs_init_sysfs(void);
2616 void btrfs_exit_sysfs(void);
2619 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2622 int btrfs_parse_options(struct btrfs_root *root, char *options);
2623 int btrfs_sync_fs(struct super_block *sb, int wait);
2624 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2625 unsigned int line, int errno);
2627 #define btrfs_std_error(fs_info, errno) \
2630 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2634 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2635 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
2636 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2637 struct inode *inode, struct inode *dir);
2638 int btrfs_acl_chmod(struct inode *inode);
2640 #define btrfs_get_acl NULL
2641 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
2642 struct inode *inode, struct inode *dir)
2646 static inline int btrfs_acl_chmod(struct inode *inode)
2653 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2654 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2655 struct btrfs_root *root);
2656 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2657 struct btrfs_root *root);
2658 int btrfs_recover_relocation(struct btrfs_root *root);
2659 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2660 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2661 struct btrfs_root *root, struct extent_buffer *buf,
2662 struct extent_buffer *cow);
2663 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2664 struct btrfs_pending_snapshot *pending,
2665 u64 *bytes_to_reserve);
2666 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2667 struct btrfs_pending_snapshot *pending);
2670 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
2671 struct btrfs_scrub_progress *progress, int readonly);
2672 int btrfs_scrub_pause(struct btrfs_root *root);
2673 int btrfs_scrub_pause_super(struct btrfs_root *root);
2674 int btrfs_scrub_continue(struct btrfs_root *root);
2675 int btrfs_scrub_continue_super(struct btrfs_root *root);
2676 int btrfs_scrub_cancel(struct btrfs_root *root);
2677 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
2678 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
2679 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
2680 struct btrfs_scrub_progress *progress);