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__
22 #include <linux/version.h>
24 #include <linux/highmem.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"
37 struct btrfs_trans_handle;
38 struct btrfs_transaction;
39 struct btrfs_pending_snapshot;
40 extern struct kmem_cache *btrfs_trans_handle_cachep;
41 extern struct kmem_cache *btrfs_transaction_cachep;
42 extern struct kmem_cache *btrfs_bit_radix_cachep;
43 extern struct kmem_cache *btrfs_path_cachep;
44 extern struct kmem_cache *btrfs_free_space_cachep;
45 struct btrfs_ordered_sum;
47 #define BTRFS_MAGIC "_BHRfS_M"
49 #define BTRFS_MAX_LEVEL 8
51 #define BTRFS_COMPAT_EXTENT_TREE_V0
54 * files bigger than this get some pre-flushing when they are added
55 * to the ordered operations list. That way we limit the total
56 * work done by the commit
58 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
60 /* holds pointers to all of the tree roots */
61 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
63 /* stores information about which extents are in use, and reference counts */
64 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
67 * chunk tree stores translations from logical -> physical block numbering
68 * the super block points to the chunk tree
70 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
73 * stores information about which areas of a given device are in use.
74 * one per device. The tree of tree roots points to the device tree
76 #define BTRFS_DEV_TREE_OBJECTID 4ULL
78 /* one per subvolume, storing files and directories */
79 #define BTRFS_FS_TREE_OBJECTID 5ULL
81 /* directory objectid inside the root tree */
82 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
84 /* holds checksums of all the data extents */
85 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
87 /* orhpan objectid for tracking unlinked/truncated files */
88 #define BTRFS_ORPHAN_OBJECTID -5ULL
90 /* does write ahead logging to speed up fsyncs */
91 #define BTRFS_TREE_LOG_OBJECTID -6ULL
92 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
94 /* for space balancing */
95 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
96 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
99 * extent checksums all have this objectid
100 * this allows them to share the logging tree
103 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
105 /* For storing free space cache */
106 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
109 * The inode number assigned to the special inode for sotring
112 #define BTRFS_FREE_INO_OBJECTID -12ULL
114 /* dummy objectid represents multiple objectids */
115 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
118 * All files have objectids in this range.
120 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
121 #define BTRFS_LAST_FREE_OBJECTID -256ULL
122 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
126 * the device items go into the chunk tree. The key is in the form
127 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
129 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
131 #define BTRFS_BTREE_INODE_OBJECTID 1
133 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
136 * we can actually store much bigger names, but lets not confuse the rest
139 #define BTRFS_NAME_LEN 255
141 /* 32 bytes in various csum fields */
142 #define BTRFS_CSUM_SIZE 32
145 #define BTRFS_CSUM_TYPE_CRC32 0
147 static int btrfs_csum_sizes[] = { 4, 0 };
149 /* four bytes for CRC32 */
150 #define BTRFS_EMPTY_DIR_SIZE 0
152 #define BTRFS_FT_UNKNOWN 0
153 #define BTRFS_FT_REG_FILE 1
154 #define BTRFS_FT_DIR 2
155 #define BTRFS_FT_CHRDEV 3
156 #define BTRFS_FT_BLKDEV 4
157 #define BTRFS_FT_FIFO 5
158 #define BTRFS_FT_SOCK 6
159 #define BTRFS_FT_SYMLINK 7
160 #define BTRFS_FT_XATTR 8
161 #define BTRFS_FT_MAX 9
164 * The key defines the order in the tree, and so it also defines (optimal)
167 * objectid corresponds to the inode number.
169 * type tells us things about the object, and is a kind of stream selector.
170 * so for a given inode, keys with type of 1 might refer to the inode data,
171 * type of 2 may point to file data in the btree and type == 3 may point to
174 * offset is the starting byte offset for this key in the stream.
176 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
177 * in cpu native order. Otherwise they are identical and their sizes
178 * should be the same (ie both packed)
180 struct btrfs_disk_key {
184 } __attribute__ ((__packed__));
190 } __attribute__ ((__packed__));
192 struct btrfs_mapping_tree {
193 struct extent_map_tree map_tree;
196 #define BTRFS_UUID_SIZE 16
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_FSID_SIZE 16
304 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
305 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
311 /* Errors detected */
312 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
314 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
315 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
317 #define BTRFS_BACKREF_REV_MAX 256
318 #define BTRFS_BACKREF_REV_SHIFT 56
319 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
320 BTRFS_BACKREF_REV_SHIFT)
322 #define BTRFS_OLD_BACKREF_REV 0
323 #define BTRFS_MIXED_BACKREF_REV 1
326 * every tree block (leaf or node) starts with this header.
328 struct btrfs_header {
329 /* these first four must match the super block */
330 u8 csum[BTRFS_CSUM_SIZE];
331 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
332 __le64 bytenr; /* which block this node is supposed to live in */
335 /* allowed to be different from the super from here on down */
336 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
341 } __attribute__ ((__packed__));
343 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
344 sizeof(struct btrfs_header)) / \
345 sizeof(struct btrfs_key_ptr))
346 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
347 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
348 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
349 sizeof(struct btrfs_item) - \
350 sizeof(struct btrfs_file_extent_item))
351 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
352 sizeof(struct btrfs_item) -\
353 sizeof(struct btrfs_dir_item))
357 * this is a very generous portion of the super block, giving us
358 * room to translate 14 chunks with 3 stripes each.
360 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
361 #define BTRFS_LABEL_SIZE 256
364 * the super block basically lists the main trees of the FS
365 * it currently lacks any block count etc etc
367 struct btrfs_super_block {
368 u8 csum[BTRFS_CSUM_SIZE];
369 /* the first 4 fields must match struct btrfs_header */
370 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
371 __le64 bytenr; /* this block number */
374 /* allowed to be different from the btrfs_header from here own down */
381 /* this will help find the new super based on the log root */
382 __le64 log_root_transid;
385 __le64 root_dir_objectid;
391 __le32 sys_chunk_array_size;
392 __le64 chunk_root_generation;
394 __le64 compat_ro_flags;
395 __le64 incompat_flags;
400 struct btrfs_dev_item dev_item;
402 char label[BTRFS_LABEL_SIZE];
404 __le64 cache_generation;
406 /* future expansion */
408 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
409 } __attribute__ ((__packed__));
412 * Compat flags that we support. If any incompat flags are set other than the
413 * ones specified below then we will fail to mount
415 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
416 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
417 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
418 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
420 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
421 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
422 #define BTRFS_FEATURE_INCOMPAT_SUPP \
423 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
424 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
425 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
426 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
429 * A leaf is full of items. offset and size tell us where to find
430 * the item in the leaf (relative to the start of the data area)
433 struct btrfs_disk_key key;
436 } __attribute__ ((__packed__));
439 * leaves have an item area and a data area:
440 * [item0, item1....itemN] [free space] [dataN...data1, data0]
442 * The data is separate from the items to get the keys closer together
446 struct btrfs_header header;
447 struct btrfs_item items[];
448 } __attribute__ ((__packed__));
451 * all non-leaf blocks are nodes, they hold only keys and pointers to
454 struct btrfs_key_ptr {
455 struct btrfs_disk_key key;
458 } __attribute__ ((__packed__));
461 struct btrfs_header header;
462 struct btrfs_key_ptr ptrs[];
463 } __attribute__ ((__packed__));
466 * btrfs_paths remember the path taken from the root down to the leaf.
467 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
468 * to any other levels that are present.
470 * The slots array records the index of the item or block pointer
471 * used while walking the tree.
474 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
475 int slots[BTRFS_MAX_LEVEL];
476 /* if there is real range locking, this locks field will change */
477 int locks[BTRFS_MAX_LEVEL];
479 /* keep some upper locks as we walk down */
483 * set by btrfs_split_item, tells search_slot to keep all locks
484 * and to force calls to keep space in the nodes
486 unsigned int search_for_split:1;
487 unsigned int keep_locks:1;
488 unsigned int skip_locking:1;
489 unsigned int leave_spinning:1;
490 unsigned int search_commit_root:1;
494 * items in the extent btree are used to record the objectid of the
495 * owner of the block and the number of references
498 struct btrfs_extent_item {
502 } __attribute__ ((__packed__));
504 struct btrfs_extent_item_v0 {
506 } __attribute__ ((__packed__));
508 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
509 sizeof(struct btrfs_item))
511 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
512 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
514 /* following flags only apply to tree blocks */
516 /* use full backrefs for extent pointers in the block */
517 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
519 struct btrfs_tree_block_info {
520 struct btrfs_disk_key key;
522 } __attribute__ ((__packed__));
524 struct btrfs_extent_data_ref {
529 } __attribute__ ((__packed__));
531 struct btrfs_shared_data_ref {
533 } __attribute__ ((__packed__));
535 struct btrfs_extent_inline_ref {
538 } __attribute__ ((__packed__));
540 /* old style backrefs item */
541 struct btrfs_extent_ref_v0 {
546 } __attribute__ ((__packed__));
549 /* dev extents record free space on individual devices. The owner
550 * field points back to the chunk allocation mapping tree that allocated
551 * the extent. The chunk tree uuid field is a way to double check the owner
553 struct btrfs_dev_extent {
555 __le64 chunk_objectid;
558 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
559 } __attribute__ ((__packed__));
561 struct btrfs_inode_ref {
565 } __attribute__ ((__packed__));
567 struct btrfs_timespec {
570 } __attribute__ ((__packed__));
572 enum btrfs_compression_type {
573 BTRFS_COMPRESS_NONE = 0,
574 BTRFS_COMPRESS_ZLIB = 1,
575 BTRFS_COMPRESS_LZO = 2,
576 BTRFS_COMPRESS_TYPES = 2,
577 BTRFS_COMPRESS_LAST = 3,
580 struct btrfs_inode_item {
581 /* nfs style generation number */
583 /* transid that last touched this inode */
595 /* modification sequence number for NFS */
599 * a little future expansion, for more than this we can
600 * just grow the inode item and version it
603 struct btrfs_timespec atime;
604 struct btrfs_timespec ctime;
605 struct btrfs_timespec mtime;
606 struct btrfs_timespec otime;
607 } __attribute__ ((__packed__));
609 struct btrfs_dir_log_item {
611 } __attribute__ ((__packed__));
613 struct btrfs_dir_item {
614 struct btrfs_disk_key location;
619 } __attribute__ ((__packed__));
621 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
623 struct btrfs_root_item {
624 struct btrfs_inode_item inode;
630 __le64 last_snapshot;
633 struct btrfs_disk_key drop_progress;
636 } __attribute__ ((__packed__));
639 * this is used for both forward and backward root refs
641 struct btrfs_root_ref {
645 } __attribute__ ((__packed__));
647 #define BTRFS_FILE_EXTENT_INLINE 0
648 #define BTRFS_FILE_EXTENT_REG 1
649 #define BTRFS_FILE_EXTENT_PREALLOC 2
651 struct btrfs_file_extent_item {
653 * transaction id that created this extent
657 * max number of bytes to hold this extent in ram
658 * when we split a compressed extent we can't know how big
659 * each of the resulting pieces will be. So, this is
660 * an upper limit on the size of the extent in ram instead of
666 * 32 bits for the various ways we might encode the data,
667 * including compression and encryption. If any of these
668 * are set to something a given disk format doesn't understand
669 * it is treated like an incompat flag for reading and writing,
674 __le16 other_encoding; /* spare for later use */
676 /* are we inline data or a real extent? */
680 * disk space consumed by the extent, checksum blocks are included
684 __le64 disk_num_bytes;
686 * the logical offset in file blocks (no csums)
687 * this extent record is for. This allows a file extent to point
688 * into the middle of an existing extent on disk, sharing it
689 * between two snapshots (useful if some bytes in the middle of the
690 * extent have changed
694 * the logical number of file blocks (no csums included). This
695 * always reflects the size uncompressed and without encoding.
699 } __attribute__ ((__packed__));
701 struct btrfs_csum_item {
703 } __attribute__ ((__packed__));
705 /* different types of block groups (and chunks) */
706 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
707 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
708 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
709 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
710 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
711 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
712 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
713 #define BTRFS_NR_RAID_TYPES 5
715 struct btrfs_block_group_item {
717 __le64 chunk_objectid;
719 } __attribute__ ((__packed__));
721 struct btrfs_space_info {
724 u64 total_bytes; /* total bytes in the space,
725 this doesn't take mirrors into account */
726 u64 bytes_used; /* total bytes used,
727 this doesn't take mirrors into account */
728 u64 bytes_pinned; /* total bytes pinned, will be freed when the
729 transaction finishes */
730 u64 bytes_reserved; /* total bytes the allocator has reserved for
731 current allocations */
732 u64 bytes_readonly; /* total bytes that are read only */
734 u64 bytes_may_use; /* number of bytes that may be used for
735 delalloc/allocations */
736 u64 disk_used; /* total bytes used on disk */
737 u64 disk_total; /* total bytes on disk, takes mirrors into
741 * we bump reservation progress every time we decrement
742 * bytes_reserved. This way people waiting for reservations
743 * know something good has happened and they can check
744 * for progress. The number here isn't to be trusted, it
745 * just shows reclaim activity
747 unsigned long reservation_progress;
749 unsigned int full:1; /* indicates that we cannot allocate any more
750 chunks for this space */
751 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
753 unsigned int force_alloc; /* set if we need to force a chunk
754 alloc for this space */
756 struct list_head list;
758 /* for block groups in our same type */
759 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
761 struct rw_semaphore groups_sem;
762 atomic_t caching_threads;
765 struct btrfs_block_rsv {
769 struct btrfs_space_info *space_info;
770 struct list_head list;
773 unsigned int priority:8;
774 unsigned int durable:1;
775 unsigned int refill_used:1;
780 * free clusters are used to claim free space in relatively large chunks,
781 * allowing us to do less seeky writes. They are used for all metadata
782 * allocations and data allocations in ssd mode.
784 struct btrfs_free_cluster {
786 spinlock_t refill_lock;
789 /* largest extent in this cluster */
792 /* first extent starting offset */
795 struct btrfs_block_group_cache *block_group;
797 * when a cluster is allocated from a block group, we put the
798 * cluster onto a list in the block group so that it can
799 * be freed before the block group is freed.
801 struct list_head block_group_list;
804 enum btrfs_caching_type {
806 BTRFS_CACHE_STARTED = 1,
807 BTRFS_CACHE_FINISHED = 2,
810 enum btrfs_disk_cache_state {
811 BTRFS_DC_WRITTEN = 0,
815 BTRFS_DC_NEED_WRITE = 4,
818 struct btrfs_caching_control {
819 struct list_head list;
821 wait_queue_head_t wait;
822 struct btrfs_block_group_cache *block_group;
827 struct btrfs_block_group_cache {
828 struct btrfs_key key;
829 struct btrfs_block_group_item item;
830 struct btrfs_fs_info *fs_info;
840 unsigned int dirty:1;
843 int disk_cache_state;
845 /* cache tracking stuff */
847 struct btrfs_caching_control *caching_ctl;
848 u64 last_byte_to_unpin;
850 struct btrfs_space_info *space_info;
852 /* free space cache stuff */
853 struct btrfs_free_space_ctl *free_space_ctl;
855 /* block group cache stuff */
856 struct rb_node cache_node;
858 /* for block groups in the same raid type */
859 struct list_head list;
864 /* List of struct btrfs_free_clusters for this block group.
865 * Today it will only have one thing on it, but that may change
867 struct list_head cluster_list;
870 struct reloc_control;
872 struct btrfs_fs_devices;
873 struct btrfs_delayed_root;
874 struct btrfs_fs_info {
875 u8 fsid[BTRFS_FSID_SIZE];
876 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
877 struct btrfs_root *extent_root;
878 struct btrfs_root *tree_root;
879 struct btrfs_root *chunk_root;
880 struct btrfs_root *dev_root;
881 struct btrfs_root *fs_root;
882 struct btrfs_root *csum_root;
884 /* the log root tree is a directory of all the other log roots */
885 struct btrfs_root *log_root_tree;
887 spinlock_t fs_roots_radix_lock;
888 struct radix_tree_root fs_roots_radix;
890 /* block group cache stuff */
891 spinlock_t block_group_cache_lock;
892 struct rb_root block_group_cache_tree;
894 struct extent_io_tree freed_extents[2];
895 struct extent_io_tree *pinned_extents;
897 /* logical->physical extent mapping */
898 struct btrfs_mapping_tree mapping_tree;
901 * block reservation for extent, checksum, root tree and
902 * delayed dir index item
904 struct btrfs_block_rsv global_block_rsv;
905 /* block reservation for delay allocation */
906 struct btrfs_block_rsv delalloc_block_rsv;
907 /* block reservation for metadata operations */
908 struct btrfs_block_rsv trans_block_rsv;
909 /* block reservation for chunk tree */
910 struct btrfs_block_rsv chunk_block_rsv;
912 struct btrfs_block_rsv empty_block_rsv;
914 /* list of block reservations that cross multiple transactions */
915 struct list_head durable_block_rsv_list;
917 struct mutex durable_block_rsv_mutex;
920 u64 last_trans_committed;
923 * this is updated to the current trans every time a full commit
924 * is required instead of the faster short fsync log commits
926 u64 last_trans_log_full_commit;
927 u64 open_ioctl_trans;
928 unsigned long mount_opt:20;
929 unsigned long compress_type:4;
932 struct btrfs_transaction *running_transaction;
933 wait_queue_head_t transaction_throttle;
934 wait_queue_head_t transaction_wait;
935 wait_queue_head_t transaction_blocked_wait;
936 wait_queue_head_t async_submit_wait;
938 struct btrfs_super_block super_copy;
939 struct btrfs_super_block super_for_commit;
940 struct block_device *__bdev;
941 struct super_block *sb;
942 struct inode *btree_inode;
943 struct backing_dev_info bdi;
944 struct mutex trans_mutex;
945 struct mutex tree_log_mutex;
946 struct mutex transaction_kthread_mutex;
947 struct mutex cleaner_mutex;
948 struct mutex chunk_mutex;
949 struct mutex volume_mutex;
951 * this protects the ordered operations list only while we are
952 * processing all of the entries on it. This way we make
953 * sure the commit code doesn't find the list temporarily empty
954 * because another function happens to be doing non-waiting preflush
955 * before jumping into the main commit.
957 struct mutex ordered_operations_mutex;
958 struct rw_semaphore extent_commit_sem;
960 struct rw_semaphore cleanup_work_sem;
962 struct rw_semaphore subvol_sem;
963 struct srcu_struct subvol_srcu;
965 struct list_head trans_list;
966 struct list_head hashers;
967 struct list_head dead_roots;
968 struct list_head caching_block_groups;
970 spinlock_t delayed_iput_lock;
971 struct list_head delayed_iputs;
973 atomic_t nr_async_submits;
974 atomic_t async_submit_draining;
975 atomic_t nr_async_bios;
976 atomic_t async_delalloc_pages;
979 * this is used by the balancing code to wait for all the pending
982 spinlock_t ordered_extent_lock;
985 * all of the data=ordered extents pending writeback
986 * these can span multiple transactions and basically include
987 * every dirty data page that isn't from nodatacow
989 struct list_head ordered_extents;
992 * all of the inodes that have delalloc bytes. It is possible for
993 * this list to be empty even when there is still dirty data=ordered
994 * extents waiting to finish IO.
996 struct list_head delalloc_inodes;
999 * special rename and truncate targets that must be on disk before
1000 * we're allowed to commit. This is basically the ext3 style
1001 * data=ordered list.
1003 struct list_head ordered_operations;
1006 * there is a pool of worker threads for checksumming during writes
1007 * and a pool for checksumming after reads. This is because readers
1008 * can run with FS locks held, and the writers may be waiting for
1009 * those locks. We don't want ordering in the pending list to cause
1010 * deadlocks, and so the two are serviced separately.
1012 * A third pool does submit_bio to avoid deadlocking with the other
1015 struct btrfs_workers generic_worker;
1016 struct btrfs_workers workers;
1017 struct btrfs_workers delalloc_workers;
1018 struct btrfs_workers endio_workers;
1019 struct btrfs_workers endio_meta_workers;
1020 struct btrfs_workers endio_meta_write_workers;
1021 struct btrfs_workers endio_write_workers;
1022 struct btrfs_workers endio_freespace_worker;
1023 struct btrfs_workers submit_workers;
1025 * fixup workers take dirty pages that didn't properly go through
1026 * the cow mechanism and make them safe to write. It happens
1027 * for the sys_munmap function call path
1029 struct btrfs_workers fixup_workers;
1030 struct btrfs_workers delayed_workers;
1031 struct task_struct *transaction_kthread;
1032 struct task_struct *cleaner_kthread;
1033 int thread_pool_size;
1035 struct kobject super_kobj;
1036 struct completion kobj_unregister;
1039 int log_root_recovering;
1044 /* protected by the delalloc lock, used to keep from writing
1045 * metadata until there is a nice batch
1047 u64 dirty_metadata_bytes;
1048 struct list_head dirty_cowonly_roots;
1050 struct btrfs_fs_devices *fs_devices;
1053 * the space_info list is almost entirely read only. It only changes
1054 * when we add a new raid type to the FS, and that happens
1055 * very rarely. RCU is used to protect it.
1057 struct list_head space_info;
1059 struct reloc_control *reloc_ctl;
1061 spinlock_t delalloc_lock;
1062 spinlock_t new_trans_lock;
1065 /* data_alloc_cluster is only used in ssd mode */
1066 struct btrfs_free_cluster data_alloc_cluster;
1068 /* all metadata allocations go through this cluster */
1069 struct btrfs_free_cluster meta_alloc_cluster;
1071 spinlock_t ref_cache_lock;
1072 u64 total_ref_cache_size;
1074 u64 avail_data_alloc_bits;
1075 u64 avail_metadata_alloc_bits;
1076 u64 avail_system_alloc_bits;
1077 u64 data_alloc_profile;
1078 u64 metadata_alloc_profile;
1079 u64 system_alloc_profile;
1081 unsigned data_chunk_allocations;
1082 unsigned metadata_ratio;
1086 /* filesystem state */
1089 struct btrfs_delayed_root *delayed_root;
1093 * in ram representation of the tree. extent_root is used for all allocations
1094 * and for the extent tree extent_root root.
1097 struct extent_buffer *node;
1099 /* the node lock is held while changing the node pointer */
1100 spinlock_t node_lock;
1102 struct extent_buffer *commit_root;
1103 struct btrfs_root *log_root;
1104 struct btrfs_root *reloc_root;
1106 struct btrfs_root_item root_item;
1107 struct btrfs_key root_key;
1108 struct btrfs_fs_info *fs_info;
1109 struct extent_io_tree dirty_log_pages;
1111 struct kobject root_kobj;
1112 struct completion kobj_unregister;
1113 struct mutex objectid_mutex;
1115 spinlock_t accounting_lock;
1116 struct btrfs_block_rsv *block_rsv;
1118 /* free ino cache stuff */
1119 struct mutex fs_commit_mutex;
1120 struct btrfs_free_space_ctl *free_ino_ctl;
1121 enum btrfs_caching_type cached;
1122 spinlock_t cache_lock;
1123 wait_queue_head_t cache_wait;
1124 struct btrfs_free_space_ctl *free_ino_pinned;
1126 struct inode *cache_inode;
1128 struct mutex log_mutex;
1129 wait_queue_head_t log_writer_wait;
1130 wait_queue_head_t log_commit_wait[2];
1131 atomic_t log_writers;
1132 atomic_t log_commit[2];
1133 unsigned long log_transid;
1134 unsigned long last_log_commit;
1135 unsigned long log_batch;
1136 pid_t log_start_pid;
1137 bool log_multiple_pids;
1142 /* data allocations are done in sectorsize units */
1145 /* node allocations are done in nodesize units */
1148 /* leaf allocations are done in leafsize units */
1155 u64 highest_objectid;
1160 u64 defrag_trans_start;
1161 struct btrfs_key defrag_progress;
1162 struct btrfs_key defrag_max;
1167 /* the dirty list is only used by non-reference counted roots */
1168 struct list_head dirty_list;
1170 struct list_head root_list;
1172 spinlock_t orphan_lock;
1173 struct list_head orphan_list;
1174 struct btrfs_block_rsv *orphan_block_rsv;
1175 int orphan_item_inserted;
1176 int orphan_cleanup_state;
1178 spinlock_t inode_lock;
1179 /* red-black tree that keeps track of in-memory inodes */
1180 struct rb_root inode_tree;
1183 * radix tree that keeps track of delayed nodes of every inode,
1184 * protected by inode_lock
1186 struct radix_tree_root delayed_nodes_tree;
1188 * right now this just gets used so that a root has its own devid
1189 * for stat. It may be used for more later
1191 struct super_block anon_super;
1195 * inode items have the data typically returned from stat and store other
1196 * info about object characteristics. There is one for every file and dir in
1199 #define BTRFS_INODE_ITEM_KEY 1
1200 #define BTRFS_INODE_REF_KEY 12
1201 #define BTRFS_XATTR_ITEM_KEY 24
1202 #define BTRFS_ORPHAN_ITEM_KEY 48
1203 /* reserve 2-15 close to the inode for later flexibility */
1206 * dir items are the name -> inode pointers in a directory. There is one
1207 * for every name in a directory.
1209 #define BTRFS_DIR_LOG_ITEM_KEY 60
1210 #define BTRFS_DIR_LOG_INDEX_KEY 72
1211 #define BTRFS_DIR_ITEM_KEY 84
1212 #define BTRFS_DIR_INDEX_KEY 96
1214 * extent data is for file data
1216 #define BTRFS_EXTENT_DATA_KEY 108
1219 * extent csums are stored in a separate tree and hold csums for
1220 * an entire extent on disk.
1222 #define BTRFS_EXTENT_CSUM_KEY 128
1225 * root items point to tree roots. They are typically in the root
1226 * tree used by the super block to find all the other trees
1228 #define BTRFS_ROOT_ITEM_KEY 132
1231 * root backrefs tie subvols and snapshots to the directory entries that
1234 #define BTRFS_ROOT_BACKREF_KEY 144
1237 * root refs make a fast index for listing all of the snapshots and
1238 * subvolumes referenced by a given root. They point directly to the
1239 * directory item in the root that references the subvol
1241 #define BTRFS_ROOT_REF_KEY 156
1244 * extent items are in the extent map tree. These record which blocks
1245 * are used, and how many references there are to each block
1247 #define BTRFS_EXTENT_ITEM_KEY 168
1249 #define BTRFS_TREE_BLOCK_REF_KEY 176
1251 #define BTRFS_EXTENT_DATA_REF_KEY 178
1253 #define BTRFS_EXTENT_REF_V0_KEY 180
1255 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1257 #define BTRFS_SHARED_DATA_REF_KEY 184
1260 * block groups give us hints into the extent allocation trees. Which
1261 * blocks are free etc etc
1263 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1265 #define BTRFS_DEV_EXTENT_KEY 204
1266 #define BTRFS_DEV_ITEM_KEY 216
1267 #define BTRFS_CHUNK_ITEM_KEY 228
1270 * string items are for debugging. They just store a short string of
1273 #define BTRFS_STRING_ITEM_KEY 253
1275 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1276 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1277 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1278 #define BTRFS_MOUNT_SSD (1 << 3)
1279 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1280 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1281 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1282 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1283 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1284 #define BTRFS_MOUNT_NOSSD (1 << 9)
1285 #define BTRFS_MOUNT_DISCARD (1 << 10)
1286 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1287 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1288 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1289 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1290 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1292 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1293 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1294 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1299 #define BTRFS_INODE_NODATASUM (1 << 0)
1300 #define BTRFS_INODE_NODATACOW (1 << 1)
1301 #define BTRFS_INODE_READONLY (1 << 2)
1302 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1303 #define BTRFS_INODE_PREALLOC (1 << 4)
1304 #define BTRFS_INODE_SYNC (1 << 5)
1305 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1306 #define BTRFS_INODE_APPEND (1 << 7)
1307 #define BTRFS_INODE_NODUMP (1 << 8)
1308 #define BTRFS_INODE_NOATIME (1 << 9)
1309 #define BTRFS_INODE_DIRSYNC (1 << 10)
1310 #define BTRFS_INODE_COMPRESS (1 << 11)
1312 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1314 /* some macros to generate set/get funcs for the struct fields. This
1315 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1318 #define le8_to_cpu(v) (v)
1319 #define cpu_to_le8(v) (v)
1322 #define read_eb_member(eb, ptr, type, member, result) ( \
1323 read_extent_buffer(eb, (char *)(result), \
1324 ((unsigned long)(ptr)) + \
1325 offsetof(type, member), \
1326 sizeof(((type *)0)->member)))
1328 #define write_eb_member(eb, ptr, type, member, result) ( \
1329 write_extent_buffer(eb, (char *)(result), \
1330 ((unsigned long)(ptr)) + \
1331 offsetof(type, member), \
1332 sizeof(((type *)0)->member)))
1334 #ifndef BTRFS_SETGET_FUNCS
1335 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1336 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1337 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1340 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1341 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1343 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1344 u##bits res = le##bits##_to_cpu(p->member); \
1345 kunmap_atomic(p, KM_USER0); \
1348 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1351 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1352 p->member = cpu_to_le##bits(val); \
1353 kunmap_atomic(p, KM_USER0); \
1356 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1357 static inline u##bits btrfs_##name(type *s) \
1359 return le##bits##_to_cpu(s->member); \
1361 static inline void btrfs_set_##name(type *s, u##bits val) \
1363 s->member = cpu_to_le##bits(val); \
1366 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1367 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1368 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1369 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1370 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1371 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1373 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1374 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1375 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1376 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1377 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1378 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1380 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1381 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1383 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1385 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1387 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1389 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1391 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1392 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1394 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1396 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1398 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1401 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1403 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1406 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1408 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1411 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1412 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1413 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1414 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1415 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1416 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1417 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1418 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1419 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1420 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1421 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1423 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1425 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1428 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1429 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1430 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1432 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1434 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1436 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1438 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1439 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1441 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1443 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1444 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1446 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1449 unsigned long offset = (unsigned long)c;
1450 offset += offsetof(struct btrfs_chunk, stripe);
1451 offset += nr * sizeof(struct btrfs_stripe);
1452 return (struct btrfs_stripe *)offset;
1455 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1457 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1460 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1461 struct btrfs_chunk *c, int nr)
1463 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1466 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1467 struct btrfs_chunk *c, int nr)
1469 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1472 /* struct btrfs_block_group_item */
1473 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1475 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1477 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1478 struct btrfs_block_group_item, chunk_objectid, 64);
1480 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1481 struct btrfs_block_group_item, chunk_objectid, 64);
1482 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1483 struct btrfs_block_group_item, flags, 64);
1484 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1485 struct btrfs_block_group_item, flags, 64);
1487 /* struct btrfs_inode_ref */
1488 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1489 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1491 /* struct btrfs_inode_item */
1492 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1493 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1494 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1495 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1496 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1497 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1498 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1499 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1500 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1501 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1502 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1503 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1505 static inline struct btrfs_timespec *
1506 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1508 unsigned long ptr = (unsigned long)inode_item;
1509 ptr += offsetof(struct btrfs_inode_item, atime);
1510 return (struct btrfs_timespec *)ptr;
1513 static inline struct btrfs_timespec *
1514 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1516 unsigned long ptr = (unsigned long)inode_item;
1517 ptr += offsetof(struct btrfs_inode_item, mtime);
1518 return (struct btrfs_timespec *)ptr;
1521 static inline struct btrfs_timespec *
1522 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1524 unsigned long ptr = (unsigned long)inode_item;
1525 ptr += offsetof(struct btrfs_inode_item, ctime);
1526 return (struct btrfs_timespec *)ptr;
1529 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1530 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1532 /* struct btrfs_dev_extent */
1533 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1535 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1536 chunk_objectid, 64);
1537 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1539 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1541 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1543 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1544 return (u8 *)((unsigned long)dev + ptr);
1547 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1548 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1550 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1552 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1555 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1557 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1558 struct btrfs_tree_block_info *item,
1559 struct btrfs_disk_key *key)
1561 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1564 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1565 struct btrfs_tree_block_info *item,
1566 struct btrfs_disk_key *key)
1568 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1571 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1573 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1575 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1577 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1580 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1583 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1585 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1588 static inline u32 btrfs_extent_inline_ref_size(int type)
1590 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1591 type == BTRFS_SHARED_BLOCK_REF_KEY)
1592 return sizeof(struct btrfs_extent_inline_ref);
1593 if (type == BTRFS_SHARED_DATA_REF_KEY)
1594 return sizeof(struct btrfs_shared_data_ref) +
1595 sizeof(struct btrfs_extent_inline_ref);
1596 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1597 return sizeof(struct btrfs_extent_data_ref) +
1598 offsetof(struct btrfs_extent_inline_ref, offset);
1603 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1604 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1606 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1607 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1609 /* struct btrfs_node */
1610 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1611 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1613 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1616 ptr = offsetof(struct btrfs_node, ptrs) +
1617 sizeof(struct btrfs_key_ptr) * nr;
1618 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1621 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1625 ptr = offsetof(struct btrfs_node, ptrs) +
1626 sizeof(struct btrfs_key_ptr) * nr;
1627 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1630 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1633 ptr = offsetof(struct btrfs_node, ptrs) +
1634 sizeof(struct btrfs_key_ptr) * nr;
1635 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1638 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1642 ptr = offsetof(struct btrfs_node, ptrs) +
1643 sizeof(struct btrfs_key_ptr) * nr;
1644 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1647 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1649 return offsetof(struct btrfs_node, ptrs) +
1650 sizeof(struct btrfs_key_ptr) * nr;
1653 void btrfs_node_key(struct extent_buffer *eb,
1654 struct btrfs_disk_key *disk_key, int nr);
1656 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1657 struct btrfs_disk_key *disk_key, int nr)
1660 ptr = btrfs_node_key_ptr_offset(nr);
1661 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1662 struct btrfs_key_ptr, key, disk_key);
1665 /* struct btrfs_item */
1666 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1667 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1669 static inline unsigned long btrfs_item_nr_offset(int nr)
1671 return offsetof(struct btrfs_leaf, items) +
1672 sizeof(struct btrfs_item) * nr;
1675 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1678 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1681 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1682 struct btrfs_item *item)
1684 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1687 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1689 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1692 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1694 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1697 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1699 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1702 static inline void btrfs_item_key(struct extent_buffer *eb,
1703 struct btrfs_disk_key *disk_key, int nr)
1705 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1706 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1709 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1710 struct btrfs_disk_key *disk_key, int nr)
1712 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1713 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1716 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1719 * struct btrfs_root_ref
1721 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1722 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1723 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1725 /* struct btrfs_dir_item */
1726 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1727 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1728 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1729 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1731 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1732 struct btrfs_dir_item *item,
1733 struct btrfs_disk_key *key)
1735 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1738 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1739 struct btrfs_dir_item *item,
1740 struct btrfs_disk_key *key)
1742 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1745 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1747 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1749 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1752 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1753 struct btrfs_free_space_header *h,
1754 struct btrfs_disk_key *key)
1756 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1759 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1760 struct btrfs_free_space_header *h,
1761 struct btrfs_disk_key *key)
1763 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1766 /* struct btrfs_disk_key */
1767 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1769 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1770 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1772 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1773 struct btrfs_disk_key *disk)
1775 cpu->offset = le64_to_cpu(disk->offset);
1776 cpu->type = disk->type;
1777 cpu->objectid = le64_to_cpu(disk->objectid);
1780 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1781 struct btrfs_key *cpu)
1783 disk->offset = cpu_to_le64(cpu->offset);
1784 disk->type = cpu->type;
1785 disk->objectid = cpu_to_le64(cpu->objectid);
1788 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1789 struct btrfs_key *key, int nr)
1791 struct btrfs_disk_key disk_key;
1792 btrfs_node_key(eb, &disk_key, nr);
1793 btrfs_disk_key_to_cpu(key, &disk_key);
1796 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1797 struct btrfs_key *key, int nr)
1799 struct btrfs_disk_key disk_key;
1800 btrfs_item_key(eb, &disk_key, nr);
1801 btrfs_disk_key_to_cpu(key, &disk_key);
1804 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1805 struct btrfs_dir_item *item,
1806 struct btrfs_key *key)
1808 struct btrfs_disk_key disk_key;
1809 btrfs_dir_item_key(eb, item, &disk_key);
1810 btrfs_disk_key_to_cpu(key, &disk_key);
1814 static inline u8 btrfs_key_type(struct btrfs_key *key)
1819 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1824 /* struct btrfs_header */
1825 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1826 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1828 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1829 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1830 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1831 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1833 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1835 return (btrfs_header_flags(eb) & flag) == flag;
1838 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1840 u64 flags = btrfs_header_flags(eb);
1841 btrfs_set_header_flags(eb, flags | flag);
1842 return (flags & flag) == flag;
1845 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1847 u64 flags = btrfs_header_flags(eb);
1848 btrfs_set_header_flags(eb, flags & ~flag);
1849 return (flags & flag) == flag;
1852 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1854 u64 flags = btrfs_header_flags(eb);
1855 return flags >> BTRFS_BACKREF_REV_SHIFT;
1858 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1861 u64 flags = btrfs_header_flags(eb);
1862 flags &= ~BTRFS_BACKREF_REV_MASK;
1863 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1864 btrfs_set_header_flags(eb, flags);
1867 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1869 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1873 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1875 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1879 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1881 return btrfs_header_level(eb) == 0;
1884 /* struct btrfs_root_item */
1885 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1887 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1888 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1889 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1891 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1893 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1894 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1895 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1896 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1897 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1898 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1899 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1900 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1903 static inline bool btrfs_root_readonly(struct btrfs_root *root)
1905 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
1908 /* struct btrfs_super_block */
1910 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1911 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1912 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1914 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1915 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1916 struct btrfs_super_block, sys_chunk_array_size, 32);
1917 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1918 struct btrfs_super_block, chunk_root_generation, 64);
1919 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1921 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1923 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1924 chunk_root_level, 8);
1925 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1927 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1928 log_root_transid, 64);
1929 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1931 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1933 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1935 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1937 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1939 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1941 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1943 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1944 root_dir_objectid, 64);
1945 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1947 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1949 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1950 compat_ro_flags, 64);
1951 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1952 incompat_flags, 64);
1953 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1955 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1956 cache_generation, 64);
1958 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1960 int t = btrfs_super_csum_type(s);
1961 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1962 return btrfs_csum_sizes[t];
1965 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1967 return offsetof(struct btrfs_leaf, items);
1970 /* struct btrfs_file_extent_item */
1971 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1973 static inline unsigned long
1974 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1976 unsigned long offset = (unsigned long)e;
1977 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1981 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1983 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1986 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1988 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1990 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1991 disk_num_bytes, 64);
1992 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1994 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1996 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1998 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2000 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2002 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2003 other_encoding, 16);
2005 /* this returns the number of file bytes represented by the inline item.
2006 * If an item is compressed, this is the uncompressed size
2008 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2009 struct btrfs_file_extent_item *e)
2011 return btrfs_file_extent_ram_bytes(eb, e);
2015 * this returns the number of bytes used by the item on disk, minus the
2016 * size of any extent headers. If a file is compressed on disk, this is
2017 * the compressed size
2019 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2020 struct btrfs_item *e)
2022 unsigned long offset;
2023 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2024 return btrfs_item_size(eb, e) - offset;
2027 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2029 return sb->s_fs_info;
2032 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2035 return root->leafsize;
2036 return root->nodesize;
2039 /* helper function to cast into the data area of the leaf. */
2040 #define btrfs_item_ptr(leaf, slot, type) \
2041 ((type *)(btrfs_leaf_data(leaf) + \
2042 btrfs_item_offset_nr(leaf, slot)))
2044 #define btrfs_item_ptr_offset(leaf, slot) \
2045 ((unsigned long)(btrfs_leaf_data(leaf) + \
2046 btrfs_item_offset_nr(leaf, slot)))
2048 static inline struct dentry *fdentry(struct file *file)
2050 return file->f_path.dentry;
2053 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2055 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2056 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2060 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2063 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2067 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2068 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2069 struct btrfs_root *root, unsigned long count);
2070 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2071 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2072 struct btrfs_root *root, u64 bytenr,
2073 u64 num_bytes, u64 *refs, u64 *flags);
2074 int btrfs_pin_extent(struct btrfs_root *root,
2075 u64 bytenr, u64 num, int reserved);
2076 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2077 struct btrfs_root *root,
2078 u64 objectid, u64 offset, u64 bytenr);
2079 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2080 struct btrfs_fs_info *info,
2082 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2083 u64 btrfs_find_block_group(struct btrfs_root *root,
2084 u64 search_start, u64 search_hint, int owner);
2085 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2086 struct btrfs_root *root, u32 blocksize,
2087 u64 parent, u64 root_objectid,
2088 struct btrfs_disk_key *key, int level,
2089 u64 hint, u64 empty_size);
2090 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2091 struct btrfs_root *root,
2092 struct extent_buffer *buf,
2093 u64 parent, int last_ref);
2094 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2095 struct btrfs_root *root,
2096 u64 bytenr, u32 blocksize,
2098 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2099 struct btrfs_root *root,
2100 u64 root_objectid, u64 owner,
2101 u64 offset, struct btrfs_key *ins);
2102 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2103 struct btrfs_root *root,
2104 u64 root_objectid, u64 owner, u64 offset,
2105 struct btrfs_key *ins);
2106 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2107 struct btrfs_root *root,
2108 u64 num_bytes, u64 min_alloc_size,
2109 u64 empty_size, u64 hint_byte,
2110 u64 search_end, struct btrfs_key *ins,
2112 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2113 struct extent_buffer *buf, int full_backref);
2114 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2115 struct extent_buffer *buf, int full_backref);
2116 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2117 struct btrfs_root *root,
2118 u64 bytenr, u64 num_bytes, u64 flags,
2120 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2121 struct btrfs_root *root,
2122 u64 bytenr, u64 num_bytes, u64 parent,
2123 u64 root_objectid, u64 owner, u64 offset);
2125 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2126 int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
2127 u64 num_bytes, int reserve, int sinfo);
2128 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2129 struct btrfs_root *root);
2130 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2131 struct btrfs_root *root);
2132 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2133 struct btrfs_root *root,
2134 u64 bytenr, u64 num_bytes, u64 parent,
2135 u64 root_objectid, u64 owner, u64 offset);
2137 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2138 struct btrfs_root *root);
2139 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2140 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2141 int btrfs_read_block_groups(struct btrfs_root *root);
2142 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2143 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2144 struct btrfs_root *root, u64 bytes_used,
2145 u64 type, u64 chunk_objectid, u64 chunk_offset,
2147 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2148 struct btrfs_root *root, u64 group_start);
2149 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2150 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2151 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2152 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2153 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2154 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2155 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2156 struct btrfs_root *root,
2158 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2159 struct btrfs_root *root);
2160 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2161 struct inode *inode);
2162 void btrfs_orphan_release_metadata(struct inode *inode);
2163 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2164 struct btrfs_pending_snapshot *pending);
2165 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2166 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2167 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2168 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2169 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2170 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2171 void btrfs_free_block_rsv(struct btrfs_root *root,
2172 struct btrfs_block_rsv *rsv);
2173 void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2174 struct btrfs_block_rsv *rsv);
2175 int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2176 struct btrfs_root *root,
2177 struct btrfs_block_rsv *block_rsv,
2179 int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2180 struct btrfs_root *root,
2181 struct btrfs_block_rsv *block_rsv,
2182 u64 min_reserved, int min_factor);
2183 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2184 struct btrfs_block_rsv *dst_rsv,
2186 void btrfs_block_rsv_release(struct btrfs_root *root,
2187 struct btrfs_block_rsv *block_rsv,
2189 int btrfs_set_block_group_ro(struct btrfs_root *root,
2190 struct btrfs_block_group_cache *cache);
2191 int btrfs_set_block_group_rw(struct btrfs_root *root,
2192 struct btrfs_block_group_cache *cache);
2193 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2194 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2195 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2196 u64 start, u64 end);
2197 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2198 u64 num_bytes, u64 *actual_bytes);
2199 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2200 struct btrfs_root *root, u64 type);
2201 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2203 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2205 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2206 int level, int *slot);
2207 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2208 int btrfs_previous_item(struct btrfs_root *root,
2209 struct btrfs_path *path, u64 min_objectid,
2211 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2212 struct btrfs_root *root, struct btrfs_path *path,
2213 struct btrfs_key *new_key);
2214 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2215 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2216 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2217 struct btrfs_key *key, int lowest_level,
2218 int cache_only, u64 min_trans);
2219 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2220 struct btrfs_key *max_key,
2221 struct btrfs_path *path, int cache_only,
2223 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2224 struct btrfs_root *root, struct extent_buffer *buf,
2225 struct extent_buffer *parent, int parent_slot,
2226 struct extent_buffer **cow_ret);
2227 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2228 struct btrfs_root *root,
2229 struct extent_buffer *buf,
2230 struct extent_buffer **cow_ret, u64 new_root_objectid);
2231 int btrfs_block_can_be_shared(struct btrfs_root *root,
2232 struct extent_buffer *buf);
2233 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2234 *root, struct btrfs_path *path, u32 data_size);
2235 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2236 struct btrfs_root *root,
2237 struct btrfs_path *path,
2238 u32 new_size, int from_end);
2239 int btrfs_split_item(struct btrfs_trans_handle *trans,
2240 struct btrfs_root *root,
2241 struct btrfs_path *path,
2242 struct btrfs_key *new_key,
2243 unsigned long split_offset);
2244 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2245 struct btrfs_root *root,
2246 struct btrfs_path *path,
2247 struct btrfs_key *new_key);
2248 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2249 *root, struct btrfs_key *key, struct btrfs_path *p, int
2251 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2252 struct btrfs_root *root, struct extent_buffer *parent,
2253 int start_slot, int cache_only, u64 *last_ret,
2254 struct btrfs_key *progress);
2255 void btrfs_release_path(struct btrfs_path *p);
2256 struct btrfs_path *btrfs_alloc_path(void);
2257 void btrfs_free_path(struct btrfs_path *p);
2258 void btrfs_set_path_blocking(struct btrfs_path *p);
2259 void btrfs_clear_path_blocking(struct btrfs_path *p,
2260 struct extent_buffer *held);
2261 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2263 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2264 struct btrfs_path *path, int slot, int nr);
2265 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2266 struct btrfs_root *root,
2267 struct btrfs_path *path)
2269 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2272 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2273 struct btrfs_root *root, struct btrfs_path *path,
2274 struct btrfs_key *cpu_key, u32 *data_size,
2275 u32 total_data, u32 total_size, int nr);
2276 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2277 *root, struct btrfs_key *key, void *data, u32 data_size);
2278 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2279 struct btrfs_root *root,
2280 struct btrfs_path *path,
2281 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2283 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2284 struct btrfs_root *root,
2285 struct btrfs_path *path,
2286 struct btrfs_key *key,
2289 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2292 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2293 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2294 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2295 int btrfs_drop_snapshot(struct btrfs_root *root,
2296 struct btrfs_block_rsv *block_rsv, int update_ref);
2297 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2298 struct btrfs_root *root,
2299 struct extent_buffer *node,
2300 struct extent_buffer *parent);
2302 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2303 struct btrfs_path *path,
2304 u64 root_id, u64 ref_id);
2305 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2306 struct btrfs_root *tree_root,
2307 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2308 const char *name, int name_len);
2309 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2310 struct btrfs_root *tree_root,
2311 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2312 const char *name, int name_len);
2313 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2314 struct btrfs_key *key);
2315 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2316 *root, struct btrfs_key *key, struct btrfs_root_item
2318 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2319 *root, struct btrfs_key *key, struct btrfs_root_item
2321 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2322 btrfs_root_item *item, struct btrfs_key *key);
2323 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2324 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2325 int btrfs_set_root_node(struct btrfs_root_item *item,
2326 struct extent_buffer *node);
2327 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2330 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2331 struct btrfs_root *root, const char *name,
2332 int name_len, struct inode *dir,
2333 struct btrfs_key *location, u8 type, u64 index);
2334 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2335 struct btrfs_root *root,
2336 struct btrfs_path *path, u64 dir,
2337 const char *name, int name_len,
2339 struct btrfs_dir_item *
2340 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2341 struct btrfs_root *root,
2342 struct btrfs_path *path, u64 dir,
2343 u64 objectid, const char *name, int name_len,
2345 struct btrfs_dir_item *
2346 btrfs_search_dir_index_item(struct btrfs_root *root,
2347 struct btrfs_path *path, u64 dirid,
2348 const char *name, int name_len);
2349 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2350 struct btrfs_path *path,
2351 const char *name, int name_len);
2352 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2353 struct btrfs_root *root,
2354 struct btrfs_path *path,
2355 struct btrfs_dir_item *di);
2356 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2357 struct btrfs_root *root,
2358 struct btrfs_path *path, u64 objectid,
2359 const char *name, u16 name_len,
2360 const void *data, u16 data_len);
2361 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2362 struct btrfs_root *root,
2363 struct btrfs_path *path, u64 dir,
2364 const char *name, u16 name_len,
2366 int verify_dir_item(struct btrfs_root *root,
2367 struct extent_buffer *leaf,
2368 struct btrfs_dir_item *dir_item);
2371 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2372 struct btrfs_root *root, u64 offset);
2373 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2374 struct btrfs_root *root, u64 offset);
2375 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2378 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2379 struct btrfs_root *root,
2380 const char *name, int name_len,
2381 u64 inode_objectid, u64 ref_objectid, u64 index);
2382 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2383 struct btrfs_root *root,
2384 const char *name, int name_len,
2385 u64 inode_objectid, u64 ref_objectid, u64 *index);
2386 struct btrfs_inode_ref *
2387 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2388 struct btrfs_root *root,
2389 struct btrfs_path *path,
2390 const char *name, int name_len,
2391 u64 inode_objectid, u64 ref_objectid, int mod);
2392 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2393 struct btrfs_root *root,
2394 struct btrfs_path *path, u64 objectid);
2395 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2396 *root, struct btrfs_path *path,
2397 struct btrfs_key *location, int mod);
2400 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2401 struct btrfs_root *root, u64 bytenr, u64 len);
2402 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2403 struct bio *bio, u32 *dst);
2404 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2405 struct bio *bio, u64 logical_offset, u32 *dst);
2406 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2407 struct btrfs_root *root,
2408 u64 objectid, u64 pos,
2409 u64 disk_offset, u64 disk_num_bytes,
2410 u64 num_bytes, u64 offset, u64 ram_bytes,
2411 u8 compression, u8 encryption, u16 other_encoding);
2412 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *root,
2414 struct btrfs_path *path, u64 objectid,
2415 u64 bytenr, int mod);
2416 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2417 struct btrfs_root *root,
2418 struct btrfs_ordered_sum *sums);
2419 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2420 struct bio *bio, u64 file_start, int contig);
2421 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2422 struct btrfs_root *root,
2423 struct btrfs_path *path,
2424 u64 bytenr, int cow);
2425 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2426 u64 end, struct list_head *list);
2429 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2430 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2431 #define ClearPageChecked ClearPageFsMisc
2432 #define SetPageChecked SetPageFsMisc
2433 #define PageChecked PageFsMisc
2436 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2437 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2438 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2439 struct btrfs_root *root,
2440 struct inode *dir, struct inode *inode,
2441 const char *name, int name_len);
2442 int btrfs_add_link(struct btrfs_trans_handle *trans,
2443 struct inode *parent_inode, struct inode *inode,
2444 const char *name, int name_len, int add_backref, u64 index);
2445 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2446 struct btrfs_root *root,
2447 struct inode *dir, u64 objectid,
2448 const char *name, int name_len);
2449 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2450 struct btrfs_root *root,
2451 struct inode *inode, u64 new_size,
2454 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2455 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2456 struct extent_state **cached_state);
2457 int btrfs_writepages(struct address_space *mapping,
2458 struct writeback_control *wbc);
2459 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2460 struct btrfs_root *new_root,
2461 u64 new_dirid, u64 alloc_hint);
2462 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2463 size_t size, struct bio *bio, unsigned long bio_flags);
2465 unsigned long btrfs_force_ra(struct address_space *mapping,
2466 struct file_ra_state *ra, struct file *file,
2467 pgoff_t offset, pgoff_t last_index);
2468 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2469 int btrfs_readpage(struct file *file, struct page *page);
2470 void btrfs_evict_inode(struct inode *inode);
2471 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2472 void btrfs_dirty_inode(struct inode *inode);
2473 struct inode *btrfs_alloc_inode(struct super_block *sb);
2474 void btrfs_destroy_inode(struct inode *inode);
2475 int btrfs_drop_inode(struct inode *inode);
2476 int btrfs_init_cachep(void);
2477 void btrfs_destroy_cachep(void);
2478 long btrfs_ioctl_trans_end(struct file *file);
2479 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2480 struct btrfs_root *root, int *was_new);
2481 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2482 size_t pg_offset, u64 start, u64 end,
2484 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2485 struct btrfs_root *root,
2486 struct inode *inode);
2487 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2488 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2489 int btrfs_orphan_cleanup(struct btrfs_root *root);
2490 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
2491 struct btrfs_pending_snapshot *pending,
2492 u64 *bytes_to_reserve);
2493 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
2494 struct btrfs_pending_snapshot *pending);
2495 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2496 struct btrfs_root *root);
2497 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2498 int btrfs_invalidate_inodes(struct btrfs_root *root);
2499 void btrfs_add_delayed_iput(struct inode *inode);
2500 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2501 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2502 u64 start, u64 num_bytes, u64 min_size,
2503 loff_t actual_len, u64 *alloc_hint);
2504 int btrfs_prealloc_file_range_trans(struct inode *inode,
2505 struct btrfs_trans_handle *trans, int mode,
2506 u64 start, u64 num_bytes, u64 min_size,
2507 loff_t actual_len, u64 *alloc_hint);
2508 extern const struct dentry_operations btrfs_dentry_operations;
2511 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2512 void btrfs_update_iflags(struct inode *inode);
2513 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2516 int btrfs_sync_file(struct file *file, int datasync);
2517 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2519 extern const struct file_operations btrfs_file_operations;
2520 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2521 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2522 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2523 struct inode *inode, u64 start, u64 end);
2524 int btrfs_release_file(struct inode *inode, struct file *file);
2525 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2526 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2527 struct page **pages, size_t num_pages,
2528 loff_t pos, size_t write_bytes,
2529 struct extent_state **cached);
2532 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2533 struct btrfs_root *root, int cache_only);
2536 int btrfs_init_sysfs(void);
2537 void btrfs_exit_sysfs(void);
2540 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2543 int btrfs_parse_options(struct btrfs_root *root, char *options);
2544 int btrfs_sync_fs(struct super_block *sb, int wait);
2545 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2546 unsigned int line, int errno);
2548 #define btrfs_std_error(fs_info, errno) \
2551 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2555 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2556 int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
2558 #define btrfs_check_acl NULL
2560 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2561 struct inode *inode, struct inode *dir);
2562 int btrfs_acl_chmod(struct inode *inode);
2565 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2566 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2567 struct btrfs_root *root);
2568 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2569 struct btrfs_root *root);
2570 int btrfs_recover_relocation(struct btrfs_root *root);
2571 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2572 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2573 struct btrfs_root *root, struct extent_buffer *buf,
2574 struct extent_buffer *cow);
2575 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2576 struct btrfs_pending_snapshot *pending,
2577 u64 *bytes_to_reserve);
2578 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2579 struct btrfs_pending_snapshot *pending);