carp: In ioctl, we have to recompute HMAC only if any configures are changed

diff --git a/sys/netinet/ip_carp.c b/sys/netinet/ip_carp.c
index debf55e..bb92f54 100644 (file)
--- a/sys/netinet/ip_carp.c
+++ b/sys/netinet/ip_carp.c
@@ -1981,7 +1981,6 @@ carp_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr, struct ucred *cr)
                error = ether_ioctl(ifp, cmd, addr);
                break;
        }
-       carp_hmac_prepare(sc);
 
        carp_reltok();
        return error;
@@ -2095,6 +2094,7 @@ carp_ioctl_setvh_dispatch(netmsg_t msg)
                carp_setrun(sc, 0);
        }
 back:
+       carp_hmac_prepare(sc);
        carp_gettok();
 
        lwkt_replymsg(&cmsg->base.lmsg, error);
@@ -2174,6 +2174,7 @@ carp_init_dispatch(netmsg_t msg)
        carp_gettok();
 
        sc->sc_if.if_flags |= IFF_RUNNING;
+       carp_hmac_prepare(sc);
        carp_set_state(sc, INIT);
        carp_setrun(sc, 0);