block: add request clone interface (v2)

[safe/jmp/linux-2.6] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 5e740a1..ebdfde8 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -765,6 +765,11 @@ extern void blk_insert_request(struct request_queue *, struct request *, int, vo
 extern void blk_requeue_request(struct request_queue *, struct request *);
 extern int blk_rq_check_limits(struct request_queue *q, struct request *rq);
 extern int blk_lld_busy(struct request_queue *q);
+extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
+                            struct bio_set *bs, gfp_t gfp_mask,
+                            int (*bio_ctr)(struct bio *, struct bio *, void *),
+                            void *data);
+extern void blk_rq_unprep_clone(struct request *rq);
 extern int blk_insert_cloned_request(struct request_queue *q,
                                     struct request *rq);
 extern void blk_plug_device(struct request_queue *);