Similiar to blk_rq_map_user except that it operates on iovec. This is a prep patch. Signed-off-by: Kanchan Joshi <joshi.k@xxxxxxxxxxx> Signed-off-by: Anuj Gupta <anuj20.g@xxxxxxxxxxx> --- block/blk-map.c | 19 +++++++++++++++++++ include/linux/blk-mq.h | 2 ++ 2 files changed, 21 insertions(+) diff --git a/block/blk-map.c b/block/blk-map.c index 4526adde0156..7fe45df3e580 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -577,6 +577,25 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq, } EXPORT_SYMBOL(blk_rq_map_user); +int blk_rq_map_user_vec(struct request_queue *q, struct request *rq, + struct rq_map_data *map_data, void __user *uvec, + unsigned long nr_vecs, gfp_t gfp_mask) +{ + struct iovec fast_iov[UIO_FASTIOV]; + struct iovec *iov = fast_iov; + struct iov_iter iter; + int ret; + + ret = import_iovec(rq_data_dir(rq), uvec, nr_vecs, UIO_FASTIOV, &iov, &iter); + if (unlikely(ret < 0)) + return ret; + ret = blk_rq_map_user_iov(q, rq, NULL, &iter, gfp_mask); + kfree(iov); + + return ret; +} +EXPORT_SYMBOL(blk_rq_map_user_vec); + /** * blk_rq_unmap_user - unmap a request with user data * @bio: start of bio list diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index d319ffa59354..0fda666d2230 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -966,6 +966,8 @@ struct rq_map_data { int blk_rq_map_user(struct request_queue *, struct request *, struct rq_map_data *, void __user *, unsigned long, gfp_t); +int blk_rq_map_user_vec(struct request_queue *, struct request *, + struct rq_map_data *, void __user *, unsigned long, gfp_t); int blk_rq_map_user_iov(struct request_queue *, struct request *, struct rq_map_data *, const struct iov_iter *, gfp_t); int blk_rq_unmap_user(struct bio *); -- 2.25.1