networkd: add back path of MTU discovery for SIT

[elogind.git] / src / network / networkd-netdev-tunnel.c

diff --git a/src/network/networkd-netdev-tunnel.c b/src/network/networkd-netdev-tunnel.c
index 56eeb99e4bec0d4709b9ac00da35c1ae54eae74b..75876960b4fcf6890c3bbd22017bca0b0b4862d9 100644 (file)
--- a/src/network/networkd-netdev-tunnel.c
+++ b/src/network/networkd-netdev-tunnel.c
@@ -27,6 +27,7 @@
 
 #include "sd-rtnl.h"
 #include "networkd-netdev-tunnel.h"
+#include "networkd-link.h"
 #include "network-internal.h"
 #include "util.h"
 #include "missing.h"
@@ -114,7 +115,15 @@ static int netdev_sit_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_me
         r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
         if (r < 0) {
                 log_error_netdev(netdev,
-                                 "Could not append IFLA_IPTUN_TTL  attribute: %s",
+                                 "Could not append IFLA_IPTUN_TTL attribute: %s",
+                                 strerror(-r));
+                return r;
+        }
+
+        r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_IPTUN_PMTUDISC attribute: %s",
                                  strerror(-r));
                 return r;
         }