1 files changed, 39 insertions, 44 deletions

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index be0743dac3ff..61596cda2b65 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -446,63 +446,41 @@ static int addr6_resolve(struct sockaddr *src_sock,
 }
 #endif
 
+static bool is_dst_local(const struct dst_entry *dst)
+{
+	if (dst->ops->family == AF_INET)
+		return !!(dst_rtable(dst)->rt_type & RTN_LOCAL);
+	else if (dst->ops->family == AF_INET6)
+		return !!(dst_rt6_info(dst)->rt6i_flags & RTF_LOCAL);
+	else
+		return false;
+}
+
 static int addr_resolve_neigh(const struct dst_entry *dst,
 			      const struct sockaddr *dst_in,
 			      struct rdma_dev_addr *addr,
-			      unsigned int ndev_flags,
 			      u32 seq)
 {
-	int ret = 0;
-
-	if (ndev_flags & IFF_LOOPBACK) {
+	if (is_dst_local(dst)) {
+		/* When the destination is local entry, source and destination
+		 * are same. Skip the neighbour lookup.
+		 */
 		memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN);
-	} else {
-		if (!(ndev_flags & IFF_NOARP)) {
-			/* If the device doesn't do ARP internally */
-			ret = fetch_ha(dst, addr, dst_in, seq);
-		}
+		return 0;
 	}
-	return ret;
-}
-
-static int copy_src_l2_addr(struct rdma_dev_addr *dev_addr,
-			    const struct sockaddr *dst_in,
-			    const struct dst_entry *dst,
-			    const struct net_device *ndev)
-{
-	int ret = 0;
-
-	if (dst->dev->flags & IFF_LOOPBACK)
-		ret = rdma_translate_ip(dst_in, dev_addr);
-	else
-		rdma_copy_src_l2_addr(dev_addr, dst->dev);
-
-	/*
-	 * If there's a gateway and type of device not ARPHRD_INFINIBAND,
-	 * we're definitely in RoCE v2 (as RoCE v1 isn't routable) set the
-	 * network type accordingly.
-	 */
-	if (has_gateway(dst, dst_in->sa_family) &&
-	    ndev->type != ARPHRD_INFINIBAND)
-		dev_addr->network = dst_in->sa_family == AF_INET ?
-						RDMA_NETWORK_IPV4 :
-						RDMA_NETWORK_IPV6;
-	else
-		dev_addr->network = RDMA_NETWORK_IB;
 
-	return ret;
+	return fetch_ha(dst, addr, dst_in, seq);
 }
 
 static int rdma_set_src_addr_rcu(struct rdma_dev_addr *dev_addr,
-				 unsigned int *ndev_flags,
 				 const struct sockaddr *dst_in,
 				 const struct dst_entry *dst)
 {
 	struct net_device *ndev = READ_ONCE(dst->dev);
 
-	*ndev_flags = ndev->flags;
 	/* A physical device must be the RDMA device to use */
-	if (ndev->flags & IFF_LOOPBACK) {
+	if (is_dst_local(dst)) {
+		int ret;
 		/*
 		 * RDMA (IB/RoCE, iWarp) doesn't run on lo interface or
 		 * loopback IP address. So if route is resolved to loopback
@@ -512,9 +490,27 @@ static int rdma_set_src_addr_rcu(struct rdma_dev_addr *dev_addr,
 		ndev = rdma_find_ndev_for_src_ip_rcu(dev_net(ndev), dst_in);
 		if (IS_ERR(ndev))
 			return -ENODEV;
+		ret = rdma_translate_ip(dst_in, dev_addr);
+		if (ret)
+			return ret;
+	} else {
+		rdma_copy_src_l2_addr(dev_addr, dst->dev);
 	}
 
-	return copy_src_l2_addr(dev_addr, dst_in, dst, ndev);
+	/*
+	 * If there's a gateway and type of device not ARPHRD_INFINIBAND,
+	 * we're definitely in RoCE v2 (as RoCE v1 isn't routable) set the
+	 * network type accordingly.
+	 */
+	if (has_gateway(dst, dst_in->sa_family) &&
+	    ndev->type != ARPHRD_INFINIBAND)
+		dev_addr->network = dst_in->sa_family == AF_INET ?
+						RDMA_NETWORK_IPV4 :
+						RDMA_NETWORK_IPV6;
+	else
+		dev_addr->network = RDMA_NETWORK_IB;
+
+	return 0;
 }
 
 static int set_addr_netns_by_gid_rcu(struct rdma_dev_addr *addr)
@@ -551,7 +547,6 @@ static int addr_resolve(struct sockaddr *src_in,
 			u32 seq)
 {
 	struct dst_entry *dst = NULL;
-	unsigned int ndev_flags = 0;
 	struct rtable *rt = NULL;
 	int ret;
 
@@ -588,7 +583,7 @@ static int addr_resolve(struct sockaddr *src_in,
 		rcu_read_unlock();
 		goto done;
 	}
-	ret = rdma_set_src_addr_rcu(addr, &ndev_flags, dst_in, dst);
+	ret = rdma_set_src_addr_rcu(addr, dst_in, dst);
 	rcu_read_unlock();
 
 	/*
@@ -596,7 +591,7 @@ static int addr_resolve(struct sockaddr *src_in,
 	 * only if src addr translation didn't fail.
 	 */
 	if (!ret && resolve_neigh)
-		ret = addr_resolve_neigh(dst, dst_in, addr, ndev_flags, seq);
+		ret = addr_resolve_neigh(dst, dst_in, addr, seq);
 
 	if (src_in->sa_family == AF_INET)
 		ip_rt_put(rt);