RDMA/cma: Add support for AF_IB to rdma_resolve_route()

Allow rdma_resolve_route() to handle the case where the user specified
the source and destination addresses using AF_IB.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/core/cma.c

@@ -1743,6 +1743,7 @@ static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
 	struct ib_sa_path_rec path_rec;
 	ib_sa_comp_mask comp_mask;
 	struct sockaddr_in6 *sin6;
+	struct sockaddr_ib *sib;
 
 	memset(&path_rec, 0, sizeof path_rec);
 	rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
@@ -1756,13 +1757,21 @@ static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
 		    IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
 		    IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
 
-	if (cma_family(id_priv) == AF_INET) {
+	switch (cma_family(id_priv)) {
+	case AF_INET:
 		path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
 		comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
-	} else {
+		break;
+	case AF_INET6:
 		sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
 		path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
 		comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
+		break;
+	case AF_IB:
+		sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
+		path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
+		comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
+		break;
 	}
 
 	id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,