network: add support to configure IPoIB interfaces

src/network/networkd-network.h

@@ -11,6 +11,7 @@
 #include "condition.h"
 #include "conf-parser.h"
 #include "hashmap.h"
+#include "ipoib.h"
 #include "net-condition.h"
 #include "netdev.h"
 #include "networkd-bridge-vlan.h"
@@ -286,6 +287,10 @@ struct Network {
         uint16_t can_termination;
         bool can_termination_set;
 
+        /* IPoIB support */
+        IPoIBMode ipoib_mode;
+        int ipoib_umcast;
+
         /* sysctl settings */
         AddressFamily ip_forward;
         int ipv4_accept_local;