D19422.diff
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	Index: head/sys/net/if_vxlan.c
	===================================================================
	--- head/sys/net/if_vxlan.c
	+++ head/sys/net/if_vxlan.c
	@@ -84,6 +84,15 @@
	int vxlsomc_users;
	};

	+/*
	+ * The maximum MTU of encapsulated ethernet frame within IPv4/UDP packet.
	+ */
	+#define VXLAN_MAX_MTU (IP_MAXPACKET - \
	+ 60 /* Maximum IPv4 header len */ - \
	+ sizeof(struct udphdr) - \
	+ sizeof(struct vxlan_header) - \
	+ ETHER_HDR_LEN - ETHER_CRC_LEN - ETHER_VLAN_ENCAP_LEN)
	+
	#define VXLAN_SO_MC_MAX_GROUPS 32

	#define VXLAN_SO_VNI_HASH_SHIFT 6
	@@ -2247,10 +2256,11 @@
	ifr = (struct ifreq *) data;
	ifd = (struct ifdrv *) data;

	+ error = 0;
	+
	switch (cmd) {
	case SIOCADDMULTI:
	case SIOCDELMULTI:
	- error = 0;
	break;

	case SIOCGDRVSPEC:
	@@ -2267,6 +2277,13 @@
	error = ifmedia_ioctl(ifp, ifr, &sc->vxl_media, cmd);
	break;

	+ case SIOCSIFMTU:
	+ if (ifr->ifr_mtu < ETHERMIN \|\| ifr->ifr_mtu > VXLAN_MAX_MTU)
	+ error = EINVAL;
	+ else
	+ ifp->if_mtu = ifr->ifr_mtu;
	+ break;
	+
	default:
	error = ether_ioctl(ifp, cmd, data);
	break;
	@@ -2747,8 +2764,8 @@
	ifp->if_ioctl = vxlan_ioctl;
	ifp->if_transmit = vxlan_transmit;
	ifp->if_qflush = vxlan_qflush;
	- ifp->if_capabilities \|= IFCAP_LINKSTATE;
	- ifp->if_capenable \|= IFCAP_LINKSTATE;
	+ ifp->if_capabilities \|= IFCAP_LINKSTATE \| IFCAP_JUMBO_MTU;
	+ ifp->if_capenable \|= IFCAP_LINKSTATE \| IFCAP_JUMBO_MTU;

	ifmedia_init(&sc->vxl_media, 0, vxlan_media_change, vxlan_media_status);
	ifmedia_add(&sc->vxl_media, IFM_ETHER \| IFM_AUTO, 0, NULL);