nvmet-rdma: implement host_traddr()

Implement callback to display the host transport address.

Signed-off-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

Author: Hannes Reinecke

drivers/nvme/target/rdma.c

@@ -2000,6 +2000,17 @@ static void nvmet_rdma_disc_port_addr(struct nvmet_req *req,
 	}
 }
 
+static ssize_t nvmet_rdma_host_port_addr(struct nvmet_ctrl *ctrl,
+		char *traddr, size_t traddr_len)
+{
+	struct nvmet_sq *nvme_sq = ctrl->sqs[0];
+	struct nvmet_rdma_queue *queue =
+		container_of(nvme_sq, struct nvmet_rdma_queue, nvme_sq);
+
+	return snprintf(traddr, traddr_len, "%pISc",
+			(struct sockaddr *)&queue->cm_id->route.addr.dst_addr);
+}
+
 static u8 nvmet_rdma_get_mdts(const struct nvmet_ctrl *ctrl)
 {
 	if (ctrl->pi_support)
@@ -2024,6 +2035,7 @@ static const struct nvmet_fabrics_ops nvmet_rdma_ops = {
 	.queue_response		= nvmet_rdma_queue_response,
 	.delete_ctrl		= nvmet_rdma_delete_ctrl,
 	.disc_traddr		= nvmet_rdma_disc_port_addr,
+	.host_traddr		= nvmet_rdma_host_port_addr,
 	.get_mdts		= nvmet_rdma_get_mdts,
 	.get_max_queue_size	= nvmet_rdma_get_max_queue_size,
 };