btrfs: move the failrec tree stuff into extent-io-tree.h

This needs to be cleaned up in the future, but for now it belongs to the
extent-io-tree stuff since it uses the internal tree search code.
Needed to export get_state_failrec and set_state_failrec as well since
we're not going to move the actual IO part of the failrec stuff out at
this point.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent-io-tree.h

@@ -4,6 +4,7 @@
 #define BTRFS_EXTENT_IO_TREE_H
 
 struct extent_changeset;
+struct io_failure_record;
 
 /* Bits for the extent state */
 #define EXTENT_DIRTY		(1U << 0)
@@ -227,4 +228,21 @@ bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
 			       u64 *end, u64 max_bytes,
 			       struct extent_state **cached_state);
 
+/* This should be reworked in the future and put elsewhere. */
+int get_state_failrec(struct extent_io_tree *tree, u64 start,
+		      struct io_failure_record **failrec);
+int set_state_failrec(struct extent_io_tree *tree, u64 start,
+		      struct io_failure_record *failrec);
+void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start,
+		u64 end);
+int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
+				struct io_failure_record **failrec_ret);
+int free_io_failure(struct extent_io_tree *failure_tree,
+		    struct extent_io_tree *io_tree,
+		    struct io_failure_record *rec);
+int clean_io_failure(struct btrfs_fs_info *fs_info,
+		     struct extent_io_tree *failure_tree,
+		     struct extent_io_tree *io_tree, u64 start,
+		     struct page *page, u64 ino, unsigned int pg_offset);
+
 #endif /* BTRFS_EXTENT_IO_TREE_H */

fs/btrfs/extent_io.c

@@ -2024,7 +2024,7 @@ u64 count_range_bits(struct extent_io_tree *tree,
  * set the private field for a given byte offset in the tree.  If there isn't
  * an extent_state there already, this does nothing.
  */
-static noinline int set_state_failrec(struct extent_io_tree *tree, u64 start,
+int set_state_failrec(struct extent_io_tree *tree, u64 start,
 		      struct io_failure_record *failrec)
 {
 	struct rb_node *node;
@@ -2052,7 +2052,7 @@ static noinline int set_state_failrec(struct extent_io_tree *tree, u64 start,
 	return ret;
 }
 
-static noinline int get_state_failrec(struct extent_io_tree *tree, u64 start,
+int get_state_failrec(struct extent_io_tree *tree, u64 start,
 		      struct io_failure_record **failrec)
 {
 	struct rb_node *node;

fs/btrfs/extent_io.h

@@ -296,10 +296,6 @@ struct btrfs_inode;
 int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
 		      u64 length, u64 logical, struct page *page,
 		      unsigned int pg_offset, int mirror_num);
-int clean_io_failure(struct btrfs_fs_info *fs_info,
-		     struct extent_io_tree *failure_tree,
-		     struct extent_io_tree *io_tree, u64 start,
-		     struct page *page, u64 ino, unsigned int pg_offset);
 void end_extent_writepage(struct page *page, int err, u64 start, u64 end);
 int btrfs_repair_eb_io_failure(struct extent_buffer *eb, int mirror_num);
 
@@ -323,19 +319,12 @@ struct io_failure_record {
 };
 
 
-void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start,
-		u64 end);
-int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
-				struct io_failure_record **failrec_ret);
 bool btrfs_check_repairable(struct inode *inode, unsigned failed_bio_pages,
 			    struct io_failure_record *failrec, int fail_mirror);
 struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio,
 				    struct io_failure_record *failrec,
 				    struct page *page, int pg_offset, int icsum,
 				    bio_end_io_t *endio_func, void *data);
-int free_io_failure(struct extent_io_tree *failure_tree,
-		    struct extent_io_tree *io_tree,
-		    struct io_failure_record *rec);
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 bool find_lock_delalloc_range(struct inode *inode,
 			     struct page *locked_page, u64 *start,