vxlan: fix duplicated and wrong error messages

vxlan_dev_configure outputs error messages before returning, no need to
print again the same mesages in vxlan_newlink. Also, vxlan_dev_configure may
return a particular error code for a different reason than vxlan_newlink
thinks.

Move the remaining error messages into vxlan_dev_configure and let
vxlan_newlink just pass on the error code.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 6358e35..6e65832 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2782,14 +2782,15 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
        struct net_device *lowerdev = NULL;
 
        if (conf->flags & VXLAN_F_GPE) {
-               if (conf->flags & ~VXLAN_F_ALLOWED_GPE)
-                       return -EINVAL;
                /* For now, allow GPE only together with COLLECT_METADATA.
                 * This can be relaxed later; in such case, the other side
                 * of the PtP link will have to be provided.
                 */
-               if (!(conf->flags & VXLAN_F_COLLECT_METADATA))
+               if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
+                   !(conf->flags & VXLAN_F_COLLECT_METADATA)) {
+                       pr_info("unsupported combination of extensions\n");
                        return -EINVAL;
+               }
 
                vxlan_raw_setup(dev);
        } else {
@@ -2877,8 +2878,10 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
                     tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 &&
                    tmp->cfg.dst_port == vxlan->cfg.dst_port &&
                    (tmp->flags & VXLAN_F_RCV_FLAGS) ==
-                   (vxlan->flags & VXLAN_F_RCV_FLAGS))
-               return -EEXIST;
+                   (vxlan->flags & VXLAN_F_RCV_FLAGS)) {
+                       pr_info("duplicate VNI %u\n", be32_to_cpu(conf->vni));
+                       return -EEXIST;
+               }
        }
 
        dev->ethtool_ops = &vxlan_ethtool_ops;
@@ -2912,7 +2915,6 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
                         struct nlattr *tb[], struct nlattr *data[])
 {
        struct vxlan_config conf;
-       int err;
 
        memset(&conf, 0, sizeof(conf));
 
@@ -3021,26 +3023,7 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
        if (tb[IFLA_MTU])
                conf.mtu = nla_get_u32(tb[IFLA_MTU]);
 
-       err = vxlan_dev_configure(src_net, dev, &conf);
-       switch (err) {
-       case -ENODEV:
-               pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
-               break;
-
-       case -EPERM:
-               pr_info("IPv6 is disabled via sysctl\n");
-               break;
-
-       case -EEXIST:
-               pr_info("duplicate VNI %u\n", be32_to_cpu(conf.vni));
-               break;
-
-       case -EINVAL:
-               pr_info("unsupported combination of extensions\n");
-               break;
-       }
-
-       return err;
+       return vxlan_dev_configure(src_net, dev, &conf);
 }
 
 static void vxlan_dellink(struct net_device *dev, struct list_head *head)