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 <asm/kmap_types.h>
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
36 struct btrfs_trans_handle;
37 struct btrfs_transaction;
38 struct btrfs_pending_snapshot;
39 extern struct kmem_cache *btrfs_trans_handle_cachep;
40 extern struct kmem_cache *btrfs_transaction_cachep;
41 extern struct kmem_cache *btrfs_bit_radix_cachep;
42 extern struct kmem_cache *btrfs_path_cachep;
43 struct btrfs_ordered_sum;
45 #define BTRFS_MAGIC "_BHRfS_M"
47 #define BTRFS_MAX_LEVEL 8
49 #define BTRFS_COMPAT_EXTENT_TREE_V0
52 * files bigger than this get some pre-flushing when they are added
53 * to the ordered operations list. That way we limit the total
54 * work done by the commit
56 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
58 /* holds pointers to all of the tree roots */
59 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
61 /* stores information about which extents are in use, and reference counts */
62 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
65 * chunk tree stores translations from logical -> physical block numbering
66 * the super block points to the chunk tree
68 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
71 * stores information about which areas of a given device are in use.
72 * one per device. The tree of tree roots points to the device tree
74 #define BTRFS_DEV_TREE_OBJECTID 4ULL
76 /* one per subvolume, storing files and directories */
77 #define BTRFS_FS_TREE_OBJECTID 5ULL
79 /* directory objectid inside the root tree */
80 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
82 /* holds checksums of all the data extents */
83 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
85 /* orhpan objectid for tracking unlinked/truncated files */
86 #define BTRFS_ORPHAN_OBJECTID -5ULL
88 /* does write ahead logging to speed up fsyncs */
89 #define BTRFS_TREE_LOG_OBJECTID -6ULL
90 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
92 /* for space balancing */
93 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
94 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
97 * extent checksums all have this objectid
98 * this allows them to share the logging tree
101 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
103 /* For storing free space cache */
104 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
106 /* dummy objectid represents multiple objectids */
107 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
110 * All files have objectids in this range.
112 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
113 #define BTRFS_LAST_FREE_OBJECTID -256ULL
114 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
118 * the device items go into the chunk tree. The key is in the form
119 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
121 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
123 #define BTRFS_BTREE_INODE_OBJECTID 1
125 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
128 * we can actually store much bigger names, but lets not confuse the rest
131 #define BTRFS_NAME_LEN 255
133 /* 32 bytes in various csum fields */
134 #define BTRFS_CSUM_SIZE 32
137 #define BTRFS_CSUM_TYPE_CRC32 0
139 static int btrfs_csum_sizes[] = { 4, 0 };
141 /* four bytes for CRC32 */
142 #define BTRFS_EMPTY_DIR_SIZE 0
144 #define BTRFS_FT_UNKNOWN 0
145 #define BTRFS_FT_REG_FILE 1
146 #define BTRFS_FT_DIR 2
147 #define BTRFS_FT_CHRDEV 3
148 #define BTRFS_FT_BLKDEV 4
149 #define BTRFS_FT_FIFO 5
150 #define BTRFS_FT_SOCK 6
151 #define BTRFS_FT_SYMLINK 7
152 #define BTRFS_FT_XATTR 8
153 #define BTRFS_FT_MAX 9
156 * The key defines the order in the tree, and so it also defines (optimal)
159 * objectid corresponds to the inode number.
161 * type tells us things about the object, and is a kind of stream selector.
162 * so for a given inode, keys with type of 1 might refer to the inode data,
163 * type of 2 may point to file data in the btree and type == 3 may point to
166 * offset is the starting byte offset for this key in the stream.
168 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
169 * in cpu native order. Otherwise they are identical and their sizes
170 * should be the same (ie both packed)
172 struct btrfs_disk_key {
176 } __attribute__ ((__packed__));
182 } __attribute__ ((__packed__));
184 struct btrfs_mapping_tree {
185 struct extent_map_tree map_tree;
188 #define BTRFS_UUID_SIZE 16
189 struct btrfs_dev_item {
190 /* the internal btrfs device id */
193 /* size of the device */
199 /* optimal io alignment for this device */
202 /* optimal io width for this device */
205 /* minimal io size for this device */
208 /* type and info about this device */
211 /* expected generation for this device */
215 * starting byte of this partition on the device,
216 * to allow for stripe alignment in the future
220 /* grouping information for allocation decisions */
223 /* seek speed 0-100 where 100 is fastest */
226 /* bandwidth 0-100 where 100 is fastest */
229 /* btrfs generated uuid for this device */
230 u8 uuid[BTRFS_UUID_SIZE];
232 /* uuid of FS who owns this device */
233 u8 fsid[BTRFS_UUID_SIZE];
234 } __attribute__ ((__packed__));
236 struct btrfs_stripe {
239 u8 dev_uuid[BTRFS_UUID_SIZE];
240 } __attribute__ ((__packed__));
243 /* size of this chunk in bytes */
246 /* objectid of the root referencing this chunk */
252 /* optimal io alignment for this chunk */
255 /* optimal io width for this chunk */
258 /* minimal io size for this chunk */
261 /* 2^16 stripes is quite a lot, a second limit is the size of a single
266 /* sub stripes only matter for raid10 */
268 struct btrfs_stripe stripe;
269 /* additional stripes go here */
270 } __attribute__ ((__packed__));
272 #define BTRFS_FREE_SPACE_EXTENT 1
273 #define BTRFS_FREE_SPACE_BITMAP 2
275 struct btrfs_free_space_entry {
279 } __attribute__ ((__packed__));
281 struct btrfs_free_space_header {
282 struct btrfs_disk_key location;
286 } __attribute__ ((__packed__));
288 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
290 BUG_ON(num_stripes == 0);
291 return sizeof(struct btrfs_chunk) +
292 sizeof(struct btrfs_stripe) * (num_stripes - 1);
295 #define BTRFS_FSID_SIZE 16
296 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
297 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
298 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
299 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
301 #define BTRFS_BACKREF_REV_MAX 256
302 #define BTRFS_BACKREF_REV_SHIFT 56
303 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
304 BTRFS_BACKREF_REV_SHIFT)
306 #define BTRFS_OLD_BACKREF_REV 0
307 #define BTRFS_MIXED_BACKREF_REV 1
310 * every tree block (leaf or node) starts with this header.
312 struct btrfs_header {
313 /* these first four must match the super block */
314 u8 csum[BTRFS_CSUM_SIZE];
315 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
316 __le64 bytenr; /* which block this node is supposed to live in */
319 /* allowed to be different from the super from here on down */
320 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
325 } __attribute__ ((__packed__));
327 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
328 sizeof(struct btrfs_header)) / \
329 sizeof(struct btrfs_key_ptr))
330 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
331 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
332 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
333 sizeof(struct btrfs_item) - \
334 sizeof(struct btrfs_file_extent_item))
335 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
336 sizeof(struct btrfs_item) -\
337 sizeof(struct btrfs_dir_item))
341 * this is a very generous portion of the super block, giving us
342 * room to translate 14 chunks with 3 stripes each.
344 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
345 #define BTRFS_LABEL_SIZE 256
348 * the super block basically lists the main trees of the FS
349 * it currently lacks any block count etc etc
351 struct btrfs_super_block {
352 u8 csum[BTRFS_CSUM_SIZE];
353 /* the first 4 fields must match struct btrfs_header */
354 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
355 __le64 bytenr; /* this block number */
358 /* allowed to be different from the btrfs_header from here own down */
365 /* this will help find the new super based on the log root */
366 __le64 log_root_transid;
369 __le64 root_dir_objectid;
375 __le32 sys_chunk_array_size;
376 __le64 chunk_root_generation;
378 __le64 compat_ro_flags;
379 __le64 incompat_flags;
384 struct btrfs_dev_item dev_item;
386 char label[BTRFS_LABEL_SIZE];
388 __le64 cache_generation;
390 /* future expansion */
392 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
393 } __attribute__ ((__packed__));
396 * Compat flags that we support. If any incompat flags are set other than the
397 * ones specified below then we will fail to mount
399 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
400 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
401 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
403 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
404 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
405 #define BTRFS_FEATURE_INCOMPAT_SUPP \
406 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
407 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
408 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
411 * A leaf is full of items. offset and size tell us where to find
412 * the item in the leaf (relative to the start of the data area)
415 struct btrfs_disk_key key;
418 } __attribute__ ((__packed__));
421 * leaves have an item area and a data area:
422 * [item0, item1....itemN] [free space] [dataN...data1, data0]
424 * The data is separate from the items to get the keys closer together
428 struct btrfs_header header;
429 struct btrfs_item items[];
430 } __attribute__ ((__packed__));
433 * all non-leaf blocks are nodes, they hold only keys and pointers to
436 struct btrfs_key_ptr {
437 struct btrfs_disk_key key;
440 } __attribute__ ((__packed__));
443 struct btrfs_header header;
444 struct btrfs_key_ptr ptrs[];
445 } __attribute__ ((__packed__));
448 * btrfs_paths remember the path taken from the root down to the leaf.
449 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
450 * to any other levels that are present.
452 * The slots array records the index of the item or block pointer
453 * used while walking the tree.
456 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
457 int slots[BTRFS_MAX_LEVEL];
458 /* if there is real range locking, this locks field will change */
459 int locks[BTRFS_MAX_LEVEL];
461 /* keep some upper locks as we walk down */
465 * set by btrfs_split_item, tells search_slot to keep all locks
466 * and to force calls to keep space in the nodes
468 unsigned int search_for_split:1;
469 unsigned int keep_locks:1;
470 unsigned int skip_locking:1;
471 unsigned int leave_spinning:1;
472 unsigned int search_commit_root:1;
476 * items in the extent btree are used to record the objectid of the
477 * owner of the block and the number of references
480 struct btrfs_extent_item {
484 } __attribute__ ((__packed__));
486 struct btrfs_extent_item_v0 {
488 } __attribute__ ((__packed__));
490 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
491 sizeof(struct btrfs_item))
493 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
494 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
496 /* following flags only apply to tree blocks */
498 /* use full backrefs for extent pointers in the block */
499 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
501 struct btrfs_tree_block_info {
502 struct btrfs_disk_key key;
504 } __attribute__ ((__packed__));
506 struct btrfs_extent_data_ref {
511 } __attribute__ ((__packed__));
513 struct btrfs_shared_data_ref {
515 } __attribute__ ((__packed__));
517 struct btrfs_extent_inline_ref {
520 } __attribute__ ((__packed__));
522 /* old style backrefs item */
523 struct btrfs_extent_ref_v0 {
528 } __attribute__ ((__packed__));
531 /* dev extents record free space on individual devices. The owner
532 * field points back to the chunk allocation mapping tree that allocated
533 * the extent. The chunk tree uuid field is a way to double check the owner
535 struct btrfs_dev_extent {
537 __le64 chunk_objectid;
540 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
541 } __attribute__ ((__packed__));
543 struct btrfs_inode_ref {
547 } __attribute__ ((__packed__));
549 struct btrfs_timespec {
552 } __attribute__ ((__packed__));
554 enum btrfs_compression_type {
555 BTRFS_COMPRESS_NONE = 0,
556 BTRFS_COMPRESS_ZLIB = 1,
557 BTRFS_COMPRESS_LAST = 2,
560 struct btrfs_inode_item {
561 /* nfs style generation number */
563 /* transid that last touched this inode */
575 /* modification sequence number for NFS */
579 * a little future expansion, for more than this we can
580 * just grow the inode item and version it
583 struct btrfs_timespec atime;
584 struct btrfs_timespec ctime;
585 struct btrfs_timespec mtime;
586 struct btrfs_timespec otime;
587 } __attribute__ ((__packed__));
589 struct btrfs_dir_log_item {
591 } __attribute__ ((__packed__));
593 struct btrfs_dir_item {
594 struct btrfs_disk_key location;
599 } __attribute__ ((__packed__));
601 struct btrfs_root_item {
602 struct btrfs_inode_item inode;
608 __le64 last_snapshot;
611 struct btrfs_disk_key drop_progress;
614 } __attribute__ ((__packed__));
617 * this is used for both forward and backward root refs
619 struct btrfs_root_ref {
623 } __attribute__ ((__packed__));
625 #define BTRFS_FILE_EXTENT_INLINE 0
626 #define BTRFS_FILE_EXTENT_REG 1
627 #define BTRFS_FILE_EXTENT_PREALLOC 2
629 struct btrfs_file_extent_item {
631 * transaction id that created this extent
635 * max number of bytes to hold this extent in ram
636 * when we split a compressed extent we can't know how big
637 * each of the resulting pieces will be. So, this is
638 * an upper limit on the size of the extent in ram instead of
644 * 32 bits for the various ways we might encode the data,
645 * including compression and encryption. If any of these
646 * are set to something a given disk format doesn't understand
647 * it is treated like an incompat flag for reading and writing,
652 __le16 other_encoding; /* spare for later use */
654 /* are we inline data or a real extent? */
658 * disk space consumed by the extent, checksum blocks are included
662 __le64 disk_num_bytes;
664 * the logical offset in file blocks (no csums)
665 * this extent record is for. This allows a file extent to point
666 * into the middle of an existing extent on disk, sharing it
667 * between two snapshots (useful if some bytes in the middle of the
668 * extent have changed
672 * the logical number of file blocks (no csums included). This
673 * always reflects the size uncompressed and without encoding.
677 } __attribute__ ((__packed__));
679 struct btrfs_csum_item {
681 } __attribute__ ((__packed__));
683 /* different types of block groups (and chunks) */
684 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
685 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
686 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
687 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
688 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
689 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
690 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
691 #define BTRFS_NR_RAID_TYPES 5
693 struct btrfs_block_group_item {
695 __le64 chunk_objectid;
697 } __attribute__ ((__packed__));
699 struct btrfs_space_info {
702 u64 total_bytes; /* total bytes in the space,
703 this doesn't take mirrors into account */
704 u64 bytes_used; /* total bytes used,
705 this does't take mirrors into account */
706 u64 bytes_pinned; /* total bytes pinned, will be freed when the
707 transaction finishes */
708 u64 bytes_reserved; /* total bytes the allocator has reserved for
709 current allocations */
710 u64 bytes_readonly; /* total bytes that are read only */
712 u64 bytes_may_use; /* number of bytes that may be used for
713 delalloc/allocations */
714 u64 disk_used; /* total bytes used on disk */
715 u64 disk_total; /* total bytes on disk, takes mirrors into
718 int full; /* indicates that we cannot allocate any more
719 chunks for this space */
720 int force_alloc; /* set if we need to force a chunk alloc for
723 struct list_head list;
725 /* for block groups in our same type */
726 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
728 struct rw_semaphore groups_sem;
729 atomic_t caching_threads;
732 struct btrfs_block_rsv {
736 struct btrfs_space_info *space_info;
737 struct list_head list;
740 unsigned int priority:8;
741 unsigned int durable:1;
742 unsigned int refill_used:1;
747 * free clusters are used to claim free space in relatively large chunks,
748 * allowing us to do less seeky writes. They are used for all metadata
749 * allocations and data allocations in ssd mode.
751 struct btrfs_free_cluster {
753 spinlock_t refill_lock;
756 /* largest extent in this cluster */
759 /* first extent starting offset */
762 /* if this cluster simply points at a bitmap in the block group */
763 bool points_to_bitmap;
765 struct btrfs_block_group_cache *block_group;
767 * when a cluster is allocated from a block group, we put the
768 * cluster onto a list in the block group so that it can
769 * be freed before the block group is freed.
771 struct list_head block_group_list;
774 enum btrfs_caching_type {
776 BTRFS_CACHE_STARTED = 1,
777 BTRFS_CACHE_FINISHED = 2,
780 enum btrfs_disk_cache_state {
781 BTRFS_DC_WRITTEN = 0,
785 BTRFS_DC_NEED_WRITE = 4,
788 struct btrfs_caching_control {
789 struct list_head list;
791 wait_queue_head_t wait;
792 struct btrfs_block_group_cache *block_group;
797 struct btrfs_block_group_cache {
798 struct btrfs_key key;
799 struct btrfs_block_group_item item;
800 struct btrfs_fs_info *fs_info;
813 unsigned int dirty:1;
816 int disk_cache_state;
818 /* cache tracking stuff */
820 struct btrfs_caching_control *caching_ctl;
821 u64 last_byte_to_unpin;
823 struct btrfs_space_info *space_info;
825 /* free space cache stuff */
826 spinlock_t tree_lock;
827 struct rb_root free_space_offset;
830 /* block group cache stuff */
831 struct rb_node cache_node;
833 /* for block groups in the same raid type */
834 struct list_head list;
839 /* List of struct btrfs_free_clusters for this block group.
840 * Today it will only have one thing on it, but that may change
842 struct list_head cluster_list;
845 struct reloc_control;
847 struct btrfs_fs_devices;
848 struct btrfs_fs_info {
849 u8 fsid[BTRFS_FSID_SIZE];
850 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
851 struct btrfs_root *extent_root;
852 struct btrfs_root *tree_root;
853 struct btrfs_root *chunk_root;
854 struct btrfs_root *dev_root;
855 struct btrfs_root *fs_root;
856 struct btrfs_root *csum_root;
858 /* the log root tree is a directory of all the other log roots */
859 struct btrfs_root *log_root_tree;
861 spinlock_t fs_roots_radix_lock;
862 struct radix_tree_root fs_roots_radix;
864 /* block group cache stuff */
865 spinlock_t block_group_cache_lock;
866 struct rb_root block_group_cache_tree;
868 struct extent_io_tree freed_extents[2];
869 struct extent_io_tree *pinned_extents;
871 /* logical->physical extent mapping */
872 struct btrfs_mapping_tree mapping_tree;
874 /* block reservation for extent, checksum and root tree */
875 struct btrfs_block_rsv global_block_rsv;
876 /* block reservation for delay allocation */
877 struct btrfs_block_rsv delalloc_block_rsv;
878 /* block reservation for metadata operations */
879 struct btrfs_block_rsv trans_block_rsv;
880 /* block reservation for chunk tree */
881 struct btrfs_block_rsv chunk_block_rsv;
883 struct btrfs_block_rsv empty_block_rsv;
885 /* list of block reservations that cross multiple transactions */
886 struct list_head durable_block_rsv_list;
888 struct mutex durable_block_rsv_mutex;
891 u64 last_trans_committed;
894 * this is updated to the current trans every time a full commit
895 * is required instead of the faster short fsync log commits
897 u64 last_trans_log_full_commit;
898 u64 open_ioctl_trans;
899 unsigned long mount_opt;
902 struct btrfs_transaction *running_transaction;
903 wait_queue_head_t transaction_throttle;
904 wait_queue_head_t transaction_wait;
905 wait_queue_head_t transaction_blocked_wait;
906 wait_queue_head_t async_submit_wait;
908 struct btrfs_super_block super_copy;
909 struct btrfs_super_block super_for_commit;
910 struct block_device *__bdev;
911 struct super_block *sb;
912 struct inode *btree_inode;
913 struct backing_dev_info bdi;
914 struct mutex trans_mutex;
915 struct mutex tree_log_mutex;
916 struct mutex transaction_kthread_mutex;
917 struct mutex cleaner_mutex;
918 struct mutex chunk_mutex;
919 struct mutex volume_mutex;
921 * this protects the ordered operations list only while we are
922 * processing all of the entries on it. This way we make
923 * sure the commit code doesn't find the list temporarily empty
924 * because another function happens to be doing non-waiting preflush
925 * before jumping into the main commit.
927 struct mutex ordered_operations_mutex;
928 struct rw_semaphore extent_commit_sem;
930 struct rw_semaphore cleanup_work_sem;
932 struct rw_semaphore subvol_sem;
933 struct srcu_struct subvol_srcu;
935 struct list_head trans_list;
936 struct list_head hashers;
937 struct list_head dead_roots;
938 struct list_head caching_block_groups;
940 spinlock_t delayed_iput_lock;
941 struct list_head delayed_iputs;
943 atomic_t nr_async_submits;
944 atomic_t async_submit_draining;
945 atomic_t nr_async_bios;
946 atomic_t async_delalloc_pages;
949 * this is used by the balancing code to wait for all the pending
952 spinlock_t ordered_extent_lock;
955 * all of the data=ordered extents pending writeback
956 * these can span multiple transactions and basically include
957 * every dirty data page that isn't from nodatacow
959 struct list_head ordered_extents;
962 * all of the inodes that have delalloc bytes. It is possible for
963 * this list to be empty even when there is still dirty data=ordered
964 * extents waiting to finish IO.
966 struct list_head delalloc_inodes;
969 * special rename and truncate targets that must be on disk before
970 * we're allowed to commit. This is basically the ext3 style
973 struct list_head ordered_operations;
976 * there is a pool of worker threads for checksumming during writes
977 * and a pool for checksumming after reads. This is because readers
978 * can run with FS locks held, and the writers may be waiting for
979 * those locks. We don't want ordering in the pending list to cause
980 * deadlocks, and so the two are serviced separately.
982 * A third pool does submit_bio to avoid deadlocking with the other
985 struct btrfs_workers generic_worker;
986 struct btrfs_workers workers;
987 struct btrfs_workers delalloc_workers;
988 struct btrfs_workers endio_workers;
989 struct btrfs_workers endio_meta_workers;
990 struct btrfs_workers endio_meta_write_workers;
991 struct btrfs_workers endio_write_workers;
992 struct btrfs_workers endio_freespace_worker;
993 struct btrfs_workers submit_workers;
995 * fixup workers take dirty pages that didn't properly go through
996 * the cow mechanism and make them safe to write. It happens
997 * for the sys_munmap function call path
999 struct btrfs_workers fixup_workers;
1000 struct task_struct *transaction_kthread;
1001 struct task_struct *cleaner_kthread;
1002 int thread_pool_size;
1004 struct kobject super_kobj;
1005 struct completion kobj_unregister;
1008 int log_root_recovering;
1013 /* protected by the delalloc lock, used to keep from writing
1014 * metadata until there is a nice batch
1016 u64 dirty_metadata_bytes;
1017 struct list_head dirty_cowonly_roots;
1019 struct btrfs_fs_devices *fs_devices;
1022 * the space_info list is almost entirely read only. It only changes
1023 * when we add a new raid type to the FS, and that happens
1024 * very rarely. RCU is used to protect it.
1026 struct list_head space_info;
1028 struct reloc_control *reloc_ctl;
1030 spinlock_t delalloc_lock;
1031 spinlock_t new_trans_lock;
1034 /* data_alloc_cluster is only used in ssd mode */
1035 struct btrfs_free_cluster data_alloc_cluster;
1037 /* all metadata allocations go through this cluster */
1038 struct btrfs_free_cluster meta_alloc_cluster;
1040 spinlock_t ref_cache_lock;
1041 u64 total_ref_cache_size;
1043 u64 avail_data_alloc_bits;
1044 u64 avail_metadata_alloc_bits;
1045 u64 avail_system_alloc_bits;
1046 u64 data_alloc_profile;
1047 u64 metadata_alloc_profile;
1048 u64 system_alloc_profile;
1050 unsigned data_chunk_allocations;
1051 unsigned metadata_ratio;
1057 * in ram representation of the tree. extent_root is used for all allocations
1058 * and for the extent tree extent_root root.
1061 struct extent_buffer *node;
1063 /* the node lock is held while changing the node pointer */
1064 spinlock_t node_lock;
1066 struct extent_buffer *commit_root;
1067 struct btrfs_root *log_root;
1068 struct btrfs_root *reloc_root;
1070 struct btrfs_root_item root_item;
1071 struct btrfs_key root_key;
1072 struct btrfs_fs_info *fs_info;
1073 struct extent_io_tree dirty_log_pages;
1075 struct kobject root_kobj;
1076 struct completion kobj_unregister;
1077 struct mutex objectid_mutex;
1079 spinlock_t accounting_lock;
1080 struct btrfs_block_rsv *block_rsv;
1082 struct mutex log_mutex;
1083 wait_queue_head_t log_writer_wait;
1084 wait_queue_head_t log_commit_wait[2];
1085 atomic_t log_writers;
1086 atomic_t log_commit[2];
1087 unsigned long log_transid;
1088 unsigned long last_log_commit;
1089 unsigned long log_batch;
1090 pid_t log_start_pid;
1091 bool log_multiple_pids;
1096 /* data allocations are done in sectorsize units */
1099 /* node allocations are done in nodesize units */
1102 /* leaf allocations are done in leafsize units */
1109 u64 highest_objectid;
1114 u64 defrag_trans_start;
1115 struct btrfs_key defrag_progress;
1116 struct btrfs_key defrag_max;
1121 /* the dirty list is only used by non-reference counted roots */
1122 struct list_head dirty_list;
1124 struct list_head root_list;
1126 spinlock_t orphan_lock;
1127 struct list_head orphan_list;
1128 struct btrfs_block_rsv *orphan_block_rsv;
1129 int orphan_item_inserted;
1130 int orphan_cleanup_state;
1132 spinlock_t inode_lock;
1133 /* red-black tree that keeps track of in-memory inodes */
1134 struct rb_root inode_tree;
1137 * right now this just gets used so that a root has its own devid
1138 * for stat. It may be used for more later
1140 struct super_block anon_super;
1144 * inode items have the data typically returned from stat and store other
1145 * info about object characteristics. There is one for every file and dir in
1148 #define BTRFS_INODE_ITEM_KEY 1
1149 #define BTRFS_INODE_REF_KEY 12
1150 #define BTRFS_XATTR_ITEM_KEY 24
1151 #define BTRFS_ORPHAN_ITEM_KEY 48
1152 /* reserve 2-15 close to the inode for later flexibility */
1155 * dir items are the name -> inode pointers in a directory. There is one
1156 * for every name in a directory.
1158 #define BTRFS_DIR_LOG_ITEM_KEY 60
1159 #define BTRFS_DIR_LOG_INDEX_KEY 72
1160 #define BTRFS_DIR_ITEM_KEY 84
1161 #define BTRFS_DIR_INDEX_KEY 96
1163 * extent data is for file data
1165 #define BTRFS_EXTENT_DATA_KEY 108
1168 * extent csums are stored in a separate tree and hold csums for
1169 * an entire extent on disk.
1171 #define BTRFS_EXTENT_CSUM_KEY 128
1174 * root items point to tree roots. They are typically in the root
1175 * tree used by the super block to find all the other trees
1177 #define BTRFS_ROOT_ITEM_KEY 132
1180 * root backrefs tie subvols and snapshots to the directory entries that
1183 #define BTRFS_ROOT_BACKREF_KEY 144
1186 * root refs make a fast index for listing all of the snapshots and
1187 * subvolumes referenced by a given root. They point directly to the
1188 * directory item in the root that references the subvol
1190 #define BTRFS_ROOT_REF_KEY 156
1193 * extent items are in the extent map tree. These record which blocks
1194 * are used, and how many references there are to each block
1196 #define BTRFS_EXTENT_ITEM_KEY 168
1198 #define BTRFS_TREE_BLOCK_REF_KEY 176
1200 #define BTRFS_EXTENT_DATA_REF_KEY 178
1202 #define BTRFS_EXTENT_REF_V0_KEY 180
1204 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1206 #define BTRFS_SHARED_DATA_REF_KEY 184
1209 * block groups give us hints into the extent allocation trees. Which
1210 * blocks are free etc etc
1212 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1214 #define BTRFS_DEV_EXTENT_KEY 204
1215 #define BTRFS_DEV_ITEM_KEY 216
1216 #define BTRFS_CHUNK_ITEM_KEY 228
1219 * string items are for debugging. They just store a short string of
1222 #define BTRFS_STRING_ITEM_KEY 253
1224 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1225 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1226 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1227 #define BTRFS_MOUNT_SSD (1 << 3)
1228 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1229 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1230 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1231 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1232 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1233 #define BTRFS_MOUNT_NOSSD (1 << 9)
1234 #define BTRFS_MOUNT_DISCARD (1 << 10)
1235 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1236 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1237 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1238 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1240 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1241 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1242 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1247 #define BTRFS_INODE_NODATASUM (1 << 0)
1248 #define BTRFS_INODE_NODATACOW (1 << 1)
1249 #define BTRFS_INODE_READONLY (1 << 2)
1250 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1251 #define BTRFS_INODE_PREALLOC (1 << 4)
1252 #define BTRFS_INODE_SYNC (1 << 5)
1253 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1254 #define BTRFS_INODE_APPEND (1 << 7)
1255 #define BTRFS_INODE_NODUMP (1 << 8)
1256 #define BTRFS_INODE_NOATIME (1 << 9)
1257 #define BTRFS_INODE_DIRSYNC (1 << 10)
1259 /* some macros to generate set/get funcs for the struct fields. This
1260 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1263 #define le8_to_cpu(v) (v)
1264 #define cpu_to_le8(v) (v)
1267 #define read_eb_member(eb, ptr, type, member, result) ( \
1268 read_extent_buffer(eb, (char *)(result), \
1269 ((unsigned long)(ptr)) + \
1270 offsetof(type, member), \
1271 sizeof(((type *)0)->member)))
1273 #define write_eb_member(eb, ptr, type, member, result) ( \
1274 write_extent_buffer(eb, (char *)(result), \
1275 ((unsigned long)(ptr)) + \
1276 offsetof(type, member), \
1277 sizeof(((type *)0)->member)))
1279 #ifndef BTRFS_SETGET_FUNCS
1280 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1281 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1282 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1285 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1286 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1288 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1289 u##bits res = le##bits##_to_cpu(p->member); \
1290 kunmap_atomic(p, KM_USER0); \
1293 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1296 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1297 p->member = cpu_to_le##bits(val); \
1298 kunmap_atomic(p, KM_USER0); \
1301 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1302 static inline u##bits btrfs_##name(type *s) \
1304 return le##bits##_to_cpu(s->member); \
1306 static inline void btrfs_set_##name(type *s, u##bits val) \
1308 s->member = cpu_to_le##bits(val); \
1311 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1312 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1313 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1314 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1315 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1316 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1318 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1319 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1320 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1321 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1322 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1323 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1325 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1326 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1328 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1330 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1332 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1334 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1336 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1337 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1339 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1341 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1343 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1346 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1348 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1351 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1353 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1356 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1357 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1358 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1359 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1360 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1361 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1362 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1363 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1364 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1365 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1366 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1368 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1370 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1373 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1374 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1375 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1377 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1379 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1381 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1383 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1384 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1386 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1388 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1389 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1391 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1394 unsigned long offset = (unsigned long)c;
1395 offset += offsetof(struct btrfs_chunk, stripe);
1396 offset += nr * sizeof(struct btrfs_stripe);
1397 return (struct btrfs_stripe *)offset;
1400 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1402 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1405 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1406 struct btrfs_chunk *c, int nr)
1408 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1411 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1412 struct btrfs_chunk *c, int nr,
1415 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1418 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1419 struct btrfs_chunk *c, int nr)
1421 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1424 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1425 struct btrfs_chunk *c, int nr,
1428 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1431 /* struct btrfs_block_group_item */
1432 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1434 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1436 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1437 struct btrfs_block_group_item, chunk_objectid, 64);
1439 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1440 struct btrfs_block_group_item, chunk_objectid, 64);
1441 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1442 struct btrfs_block_group_item, flags, 64);
1443 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1444 struct btrfs_block_group_item, flags, 64);
1446 /* struct btrfs_inode_ref */
1447 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1448 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1450 /* struct btrfs_inode_item */
1451 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1452 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1453 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1454 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1455 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1456 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1457 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1458 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1459 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1460 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1461 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1462 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1464 static inline struct btrfs_timespec *
1465 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1467 unsigned long ptr = (unsigned long)inode_item;
1468 ptr += offsetof(struct btrfs_inode_item, atime);
1469 return (struct btrfs_timespec *)ptr;
1472 static inline struct btrfs_timespec *
1473 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1475 unsigned long ptr = (unsigned long)inode_item;
1476 ptr += offsetof(struct btrfs_inode_item, mtime);
1477 return (struct btrfs_timespec *)ptr;
1480 static inline struct btrfs_timespec *
1481 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1483 unsigned long ptr = (unsigned long)inode_item;
1484 ptr += offsetof(struct btrfs_inode_item, ctime);
1485 return (struct btrfs_timespec *)ptr;
1488 static inline struct btrfs_timespec *
1489 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1491 unsigned long ptr = (unsigned long)inode_item;
1492 ptr += offsetof(struct btrfs_inode_item, otime);
1493 return (struct btrfs_timespec *)ptr;
1496 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1497 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1499 /* struct btrfs_dev_extent */
1500 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1502 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1503 chunk_objectid, 64);
1504 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1506 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1508 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1510 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1511 return (u8 *)((unsigned long)dev + ptr);
1514 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1515 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1517 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1519 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1522 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1524 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1525 struct btrfs_tree_block_info *item,
1526 struct btrfs_disk_key *key)
1528 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1531 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1532 struct btrfs_tree_block_info *item,
1533 struct btrfs_disk_key *key)
1535 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1538 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1540 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1542 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1544 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1547 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1550 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1552 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1555 static inline u32 btrfs_extent_inline_ref_size(int type)
1557 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1558 type == BTRFS_SHARED_BLOCK_REF_KEY)
1559 return sizeof(struct btrfs_extent_inline_ref);
1560 if (type == BTRFS_SHARED_DATA_REF_KEY)
1561 return sizeof(struct btrfs_shared_data_ref) +
1562 sizeof(struct btrfs_extent_inline_ref);
1563 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1564 return sizeof(struct btrfs_extent_data_ref) +
1565 offsetof(struct btrfs_extent_inline_ref, offset);
1570 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1571 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1573 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1574 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1576 /* struct btrfs_node */
1577 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1578 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1580 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1583 ptr = offsetof(struct btrfs_node, ptrs) +
1584 sizeof(struct btrfs_key_ptr) * nr;
1585 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1588 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1592 ptr = offsetof(struct btrfs_node, ptrs) +
1593 sizeof(struct btrfs_key_ptr) * nr;
1594 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1597 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1600 ptr = offsetof(struct btrfs_node, ptrs) +
1601 sizeof(struct btrfs_key_ptr) * nr;
1602 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1605 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1609 ptr = offsetof(struct btrfs_node, ptrs) +
1610 sizeof(struct btrfs_key_ptr) * nr;
1611 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1614 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1616 return offsetof(struct btrfs_node, ptrs) +
1617 sizeof(struct btrfs_key_ptr) * nr;
1620 void btrfs_node_key(struct extent_buffer *eb,
1621 struct btrfs_disk_key *disk_key, int nr);
1623 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1624 struct btrfs_disk_key *disk_key, int nr)
1627 ptr = btrfs_node_key_ptr_offset(nr);
1628 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1629 struct btrfs_key_ptr, key, disk_key);
1632 /* struct btrfs_item */
1633 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1634 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1636 static inline unsigned long btrfs_item_nr_offset(int nr)
1638 return offsetof(struct btrfs_leaf, items) +
1639 sizeof(struct btrfs_item) * nr;
1642 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1645 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1648 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1649 struct btrfs_item *item)
1651 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1654 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1656 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1659 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1661 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1664 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1666 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1669 static inline void btrfs_item_key(struct extent_buffer *eb,
1670 struct btrfs_disk_key *disk_key, int nr)
1672 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1673 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1676 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1677 struct btrfs_disk_key *disk_key, int nr)
1679 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1680 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1683 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1686 * struct btrfs_root_ref
1688 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1689 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1690 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1692 /* struct btrfs_dir_item */
1693 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1694 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1695 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1696 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1698 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1699 struct btrfs_dir_item *item,
1700 struct btrfs_disk_key *key)
1702 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1705 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1706 struct btrfs_dir_item *item,
1707 struct btrfs_disk_key *key)
1709 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1712 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1714 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1716 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1719 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1720 struct btrfs_free_space_header *h,
1721 struct btrfs_disk_key *key)
1723 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1726 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1727 struct btrfs_free_space_header *h,
1728 struct btrfs_disk_key *key)
1730 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1733 /* struct btrfs_disk_key */
1734 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1736 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1737 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1739 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1740 struct btrfs_disk_key *disk)
1742 cpu->offset = le64_to_cpu(disk->offset);
1743 cpu->type = disk->type;
1744 cpu->objectid = le64_to_cpu(disk->objectid);
1747 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1748 struct btrfs_key *cpu)
1750 disk->offset = cpu_to_le64(cpu->offset);
1751 disk->type = cpu->type;
1752 disk->objectid = cpu_to_le64(cpu->objectid);
1755 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1756 struct btrfs_key *key, int nr)
1758 struct btrfs_disk_key disk_key;
1759 btrfs_node_key(eb, &disk_key, nr);
1760 btrfs_disk_key_to_cpu(key, &disk_key);
1763 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1764 struct btrfs_key *key, int nr)
1766 struct btrfs_disk_key disk_key;
1767 btrfs_item_key(eb, &disk_key, nr);
1768 btrfs_disk_key_to_cpu(key, &disk_key);
1771 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1772 struct btrfs_dir_item *item,
1773 struct btrfs_key *key)
1775 struct btrfs_disk_key disk_key;
1776 btrfs_dir_item_key(eb, item, &disk_key);
1777 btrfs_disk_key_to_cpu(key, &disk_key);
1781 static inline u8 btrfs_key_type(struct btrfs_key *key)
1786 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1791 /* struct btrfs_header */
1792 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1793 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1795 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1796 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1797 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1798 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1800 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1802 return (btrfs_header_flags(eb) & flag) == flag;
1805 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1807 u64 flags = btrfs_header_flags(eb);
1808 btrfs_set_header_flags(eb, flags | flag);
1809 return (flags & flag) == flag;
1812 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1814 u64 flags = btrfs_header_flags(eb);
1815 btrfs_set_header_flags(eb, flags & ~flag);
1816 return (flags & flag) == flag;
1819 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1821 u64 flags = btrfs_header_flags(eb);
1822 return flags >> BTRFS_BACKREF_REV_SHIFT;
1825 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1828 u64 flags = btrfs_header_flags(eb);
1829 flags &= ~BTRFS_BACKREF_REV_MASK;
1830 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1831 btrfs_set_header_flags(eb, flags);
1834 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1836 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1840 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1842 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1846 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1848 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1852 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1854 unsigned long ptr = offsetof(struct btrfs_header, csum);
1858 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1863 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1868 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1873 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1875 return btrfs_header_level(eb) == 0;
1878 /* struct btrfs_root_item */
1879 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1881 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1882 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1883 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1885 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1887 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1888 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1889 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1890 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1891 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1892 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1893 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1894 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1897 /* struct btrfs_super_block */
1899 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1900 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1901 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1903 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1904 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1905 struct btrfs_super_block, sys_chunk_array_size, 32);
1906 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1907 struct btrfs_super_block, chunk_root_generation, 64);
1908 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1910 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1912 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1913 chunk_root_level, 8);
1914 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1916 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1917 log_root_transid, 64);
1918 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1920 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1922 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1924 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1926 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1928 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1930 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1932 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1933 root_dir_objectid, 64);
1934 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1936 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1938 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1939 compat_ro_flags, 64);
1940 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1941 incompat_flags, 64);
1942 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1944 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1945 cache_generation, 64);
1947 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1949 int t = btrfs_super_csum_type(s);
1950 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1951 return btrfs_csum_sizes[t];
1954 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1956 return offsetof(struct btrfs_leaf, items);
1959 /* struct btrfs_file_extent_item */
1960 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1962 static inline unsigned long
1963 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1965 unsigned long offset = (unsigned long)e;
1966 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1970 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1972 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1975 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1977 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1979 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1980 disk_num_bytes, 64);
1981 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1983 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1985 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1987 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1989 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1991 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1992 other_encoding, 16);
1994 /* this returns the number of file bytes represented by the inline item.
1995 * If an item is compressed, this is the uncompressed size
1997 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1998 struct btrfs_file_extent_item *e)
2000 return btrfs_file_extent_ram_bytes(eb, e);
2004 * this returns the number of bytes used by the item on disk, minus the
2005 * size of any extent headers. If a file is compressed on disk, this is
2006 * the compressed size
2008 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2009 struct btrfs_item *e)
2011 unsigned long offset;
2012 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2013 return btrfs_item_size(eb, e) - offset;
2016 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2018 return sb->s_fs_info;
2021 static inline int btrfs_set_root_name(struct btrfs_root *root,
2022 const char *name, int len)
2024 /* if we already have a name just free it */
2027 root->name = kmalloc(len+1, GFP_KERNEL);
2031 memcpy(root->name, name, len);
2032 root->name[len] = '\0';
2037 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2040 return root->leafsize;
2041 return root->nodesize;
2044 /* helper function to cast into the data area of the leaf. */
2045 #define btrfs_item_ptr(leaf, slot, type) \
2046 ((type *)(btrfs_leaf_data(leaf) + \
2047 btrfs_item_offset_nr(leaf, slot)))
2049 #define btrfs_item_ptr_offset(leaf, slot) \
2050 ((unsigned long)(btrfs_leaf_data(leaf) + \
2051 btrfs_item_offset_nr(leaf, slot)))
2053 static inline struct dentry *fdentry(struct file *file)
2055 return file->f_path.dentry;
2058 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2060 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2061 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2065 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2066 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2067 struct btrfs_root *root, unsigned long count);
2068 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2069 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2070 struct btrfs_root *root, u64 bytenr,
2071 u64 num_bytes, u64 *refs, u64 *flags);
2072 int btrfs_pin_extent(struct btrfs_root *root,
2073 u64 bytenr, u64 num, int reserved);
2074 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
2075 struct btrfs_root *root, struct extent_buffer *leaf);
2076 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2077 struct btrfs_root *root,
2078 u64 objectid, u64 offset, u64 bytenr);
2079 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
2080 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2081 struct btrfs_fs_info *info,
2083 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2084 u64 btrfs_find_block_group(struct btrfs_root *root,
2085 u64 search_start, u64 search_hint, int owner);
2086 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2087 struct btrfs_root *root, u32 blocksize,
2088 u64 parent, u64 root_objectid,
2089 struct btrfs_disk_key *key, int level,
2090 u64 hint, u64 empty_size);
2091 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2092 struct btrfs_root *root,
2093 struct extent_buffer *buf,
2094 u64 parent, int last_ref);
2095 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2096 struct btrfs_root *root,
2097 u64 bytenr, u32 blocksize,
2099 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2100 struct btrfs_root *root,
2101 u64 root_objectid, u64 owner,
2102 u64 offset, struct btrfs_key *ins);
2103 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2104 struct btrfs_root *root,
2105 u64 root_objectid, u64 owner, u64 offset,
2106 struct btrfs_key *ins);
2107 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2108 struct btrfs_root *root,
2109 u64 num_bytes, u64 min_alloc_size,
2110 u64 empty_size, u64 hint_byte,
2111 u64 search_end, struct btrfs_key *ins,
2113 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2114 struct extent_buffer *buf, int full_backref);
2115 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2116 struct extent_buffer *buf, int full_backref);
2117 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2118 struct btrfs_root *root,
2119 u64 bytenr, u64 num_bytes, u64 flags,
2121 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2122 struct btrfs_root *root,
2123 u64 bytenr, u64 num_bytes, u64 parent,
2124 u64 root_objectid, u64 owner, u64 offset);
2126 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2127 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2128 struct btrfs_root *root);
2129 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2130 struct btrfs_root *root);
2131 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2132 struct btrfs_root *root,
2133 u64 bytenr, u64 num_bytes, u64 parent,
2134 u64 root_objectid, u64 owner, u64 offset);
2136 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2137 struct btrfs_root *root);
2138 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2139 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2140 int btrfs_read_block_groups(struct btrfs_root *root);
2141 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2142 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2143 struct btrfs_root *root, u64 bytes_used,
2144 u64 type, u64 chunk_objectid, u64 chunk_offset,
2146 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2147 struct btrfs_root *root, u64 group_start);
2148 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2149 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2150 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2151 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2152 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2153 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2154 struct btrfs_root *root,
2156 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2157 struct btrfs_root *root);
2158 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2159 struct inode *inode);
2160 void btrfs_orphan_release_metadata(struct inode *inode);
2161 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2162 struct btrfs_pending_snapshot *pending);
2163 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2164 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2165 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2166 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2167 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2168 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2169 void btrfs_free_block_rsv(struct btrfs_root *root,
2170 struct btrfs_block_rsv *rsv);
2171 void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2172 struct btrfs_block_rsv *rsv);
2173 int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2174 struct btrfs_root *root,
2175 struct btrfs_block_rsv *block_rsv,
2177 int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2178 struct btrfs_root *root,
2179 struct btrfs_block_rsv *block_rsv,
2180 u64 min_reserved, int min_factor);
2181 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2182 struct btrfs_block_rsv *dst_rsv,
2184 void btrfs_block_rsv_release(struct btrfs_root *root,
2185 struct btrfs_block_rsv *block_rsv,
2187 int btrfs_set_block_group_ro(struct btrfs_root *root,
2188 struct btrfs_block_group_cache *cache);
2189 int btrfs_set_block_group_rw(struct btrfs_root *root,
2190 struct btrfs_block_group_cache *cache);
2191 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2193 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2194 int level, int *slot);
2195 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2196 int btrfs_previous_item(struct btrfs_root *root,
2197 struct btrfs_path *path, u64 min_objectid,
2199 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2200 struct btrfs_root *root, struct btrfs_path *path,
2201 struct btrfs_key *new_key);
2202 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2203 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2204 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2205 struct btrfs_key *key, int lowest_level,
2206 int cache_only, u64 min_trans);
2207 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2208 struct btrfs_key *max_key,
2209 struct btrfs_path *path, int cache_only,
2211 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2212 struct btrfs_root *root, struct extent_buffer *buf,
2213 struct extent_buffer *parent, int parent_slot,
2214 struct extent_buffer **cow_ret);
2215 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2216 struct btrfs_root *root,
2217 struct extent_buffer *buf,
2218 struct extent_buffer **cow_ret, u64 new_root_objectid);
2219 int btrfs_block_can_be_shared(struct btrfs_root *root,
2220 struct extent_buffer *buf);
2221 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2222 *root, struct btrfs_path *path, u32 data_size);
2223 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2224 struct btrfs_root *root,
2225 struct btrfs_path *path,
2226 u32 new_size, int from_end);
2227 int btrfs_split_item(struct btrfs_trans_handle *trans,
2228 struct btrfs_root *root,
2229 struct btrfs_path *path,
2230 struct btrfs_key *new_key,
2231 unsigned long split_offset);
2232 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2233 struct btrfs_root *root,
2234 struct btrfs_path *path,
2235 struct btrfs_key *new_key);
2236 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2237 *root, struct btrfs_key *key, struct btrfs_path *p, int
2239 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2240 struct btrfs_root *root, struct extent_buffer *parent,
2241 int start_slot, int cache_only, u64 *last_ret,
2242 struct btrfs_key *progress);
2243 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2244 struct btrfs_path *btrfs_alloc_path(void);
2245 void btrfs_free_path(struct btrfs_path *p);
2246 void btrfs_set_path_blocking(struct btrfs_path *p);
2247 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2249 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2250 struct btrfs_path *path, int slot, int nr);
2251 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2252 struct btrfs_root *root,
2253 struct btrfs_path *path)
2255 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2258 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2259 *root, struct btrfs_key *key, void *data, u32 data_size);
2260 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2261 struct btrfs_root *root,
2262 struct btrfs_path *path,
2263 struct btrfs_key *cpu_key, u32 *data_size,
2265 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2266 struct btrfs_root *root,
2267 struct btrfs_path *path,
2268 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2270 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2271 struct btrfs_root *root,
2272 struct btrfs_path *path,
2273 struct btrfs_key *key,
2276 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2279 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2280 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2281 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2282 int btrfs_drop_snapshot(struct btrfs_root *root,
2283 struct btrfs_block_rsv *block_rsv, int update_ref);
2284 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2285 struct btrfs_root *root,
2286 struct extent_buffer *node,
2287 struct extent_buffer *parent);
2289 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2290 struct btrfs_path *path,
2291 u64 root_id, u64 ref_id);
2292 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2293 struct btrfs_root *tree_root,
2294 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2295 const char *name, int name_len);
2296 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *tree_root,
2298 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2299 const char *name, int name_len);
2300 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2301 struct btrfs_key *key);
2302 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2303 *root, struct btrfs_key *key, struct btrfs_root_item
2305 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2306 *root, struct btrfs_key *key, struct btrfs_root_item
2308 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2309 btrfs_root_item *item, struct btrfs_key *key);
2310 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2311 u64 *found_objectid);
2312 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2313 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2314 int btrfs_set_root_node(struct btrfs_root_item *item,
2315 struct extent_buffer *node);
2317 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2318 struct btrfs_root *root, const char *name,
2319 int name_len, u64 dir,
2320 struct btrfs_key *location, u8 type, u64 index);
2321 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2322 struct btrfs_root *root,
2323 struct btrfs_path *path, u64 dir,
2324 const char *name, int name_len,
2326 struct btrfs_dir_item *
2327 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2328 struct btrfs_root *root,
2329 struct btrfs_path *path, u64 dir,
2330 u64 objectid, const char *name, int name_len,
2332 struct btrfs_dir_item *
2333 btrfs_search_dir_index_item(struct btrfs_root *root,
2334 struct btrfs_path *path, u64 dirid,
2335 const char *name, int name_len);
2336 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2337 struct btrfs_path *path,
2338 const char *name, int name_len);
2339 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2340 struct btrfs_root *root,
2341 struct btrfs_path *path,
2342 struct btrfs_dir_item *di);
2343 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2344 struct btrfs_root *root,
2345 struct btrfs_path *path, u64 objectid,
2346 const char *name, u16 name_len,
2347 const void *data, u16 data_len);
2348 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2349 struct btrfs_root *root,
2350 struct btrfs_path *path, u64 dir,
2351 const char *name, u16 name_len,
2355 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2356 struct btrfs_root *root, u64 offset);
2357 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2358 struct btrfs_root *root, u64 offset);
2359 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2362 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2363 struct btrfs_root *fs_root,
2364 u64 dirid, u64 *objectid);
2365 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2368 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2369 struct btrfs_root *root,
2370 const char *name, int name_len,
2371 u64 inode_objectid, u64 ref_objectid, u64 index);
2372 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2373 struct btrfs_root *root,
2374 const char *name, int name_len,
2375 u64 inode_objectid, u64 ref_objectid, u64 *index);
2376 struct btrfs_inode_ref *
2377 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2378 struct btrfs_root *root,
2379 struct btrfs_path *path,
2380 const char *name, int name_len,
2381 u64 inode_objectid, u64 ref_objectid, int mod);
2382 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2383 struct btrfs_root *root,
2384 struct btrfs_path *path, u64 objectid);
2385 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2386 *root, struct btrfs_path *path,
2387 struct btrfs_key *location, int mod);
2390 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2391 struct btrfs_root *root, u64 bytenr, u64 len);
2392 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2393 struct bio *bio, u32 *dst);
2394 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2395 struct bio *bio, u64 logical_offset, u32 *dst);
2396 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2397 struct btrfs_root *root,
2398 u64 objectid, u64 pos,
2399 u64 disk_offset, u64 disk_num_bytes,
2400 u64 num_bytes, u64 offset, u64 ram_bytes,
2401 u8 compression, u8 encryption, u16 other_encoding);
2402 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2403 struct btrfs_root *root,
2404 struct btrfs_path *path, u64 objectid,
2405 u64 bytenr, int mod);
2406 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2407 struct btrfs_root *root,
2408 struct btrfs_ordered_sum *sums);
2409 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2410 struct bio *bio, u64 file_start, int contig);
2411 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2412 u64 start, unsigned long len);
2413 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2414 struct btrfs_root *root,
2415 struct btrfs_path *path,
2416 u64 bytenr, int cow);
2417 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2418 struct btrfs_root *root, struct btrfs_path *path,
2420 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2421 u64 end, struct list_head *list);
2424 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2425 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2426 #define ClearPageChecked ClearPageFsMisc
2427 #define SetPageChecked SetPageFsMisc
2428 #define PageChecked PageFsMisc
2431 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2432 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2433 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2434 struct btrfs_root *root,
2435 struct inode *dir, struct inode *inode,
2436 const char *name, int name_len);
2437 int btrfs_add_link(struct btrfs_trans_handle *trans,
2438 struct inode *parent_inode, struct inode *inode,
2439 const char *name, int name_len, int add_backref, u64 index);
2440 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2441 struct btrfs_root *root,
2442 struct inode *dir, u64 objectid,
2443 const char *name, int name_len);
2444 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2445 struct btrfs_root *root,
2446 struct inode *inode, u64 new_size,
2449 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2450 int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
2452 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2453 struct extent_state **cached_state);
2454 int btrfs_writepages(struct address_space *mapping,
2455 struct writeback_control *wbc);
2456 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *new_root,
2458 u64 new_dirid, u64 alloc_hint);
2459 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2460 size_t size, struct bio *bio, unsigned long bio_flags);
2462 unsigned long btrfs_force_ra(struct address_space *mapping,
2463 struct file_ra_state *ra, struct file *file,
2464 pgoff_t offset, pgoff_t last_index);
2465 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2466 int btrfs_readpage(struct file *file, struct page *page);
2467 void btrfs_evict_inode(struct inode *inode);
2468 void btrfs_put_inode(struct inode *inode);
2469 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2470 void btrfs_dirty_inode(struct inode *inode);
2471 struct inode *btrfs_alloc_inode(struct super_block *sb);
2472 void btrfs_destroy_inode(struct inode *inode);
2473 int btrfs_drop_inode(struct inode *inode);
2474 int btrfs_init_cachep(void);
2475 void btrfs_destroy_cachep(void);
2476 long btrfs_ioctl_trans_end(struct file *file);
2477 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2478 struct btrfs_root *root, int *was_new);
2479 int btrfs_commit_write(struct file *file, struct page *page,
2480 unsigned from, unsigned to);
2481 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2482 size_t page_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 void 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 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 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2520 extern const struct file_operations btrfs_file_operations;
2521 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2522 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2523 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2524 struct inode *inode, u64 start, u64 end);
2525 int btrfs_release_file(struct inode *inode, struct file *file);
2528 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2529 struct btrfs_root *root, int cache_only);
2532 int btrfs_init_sysfs(void);
2533 void btrfs_exit_sysfs(void);
2534 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2535 int btrfs_sysfs_add_root(struct btrfs_root *root);
2536 void btrfs_sysfs_del_root(struct btrfs_root *root);
2537 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
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);
2547 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2548 int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
2550 #define btrfs_check_acl NULL
2552 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2553 struct inode *inode, struct inode *dir);
2554 int btrfs_acl_chmod(struct inode *inode);
2557 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2558 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2559 struct btrfs_root *root);
2560 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root);
2562 int btrfs_recover_relocation(struct btrfs_root *root);
2563 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2564 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2565 struct btrfs_root *root, struct extent_buffer *buf,
2566 struct extent_buffer *cow);
2567 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2568 struct btrfs_pending_snapshot *pending,
2569 u64 *bytes_to_reserve);
2570 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2571 struct btrfs_pending_snapshot *pending);