Commit 18b6f717 authored by wenxu's avatar wenxu Committed by David S. Miller
Browse files

openvswitch: Make metadata_dst tunnel work in IP_TUNNEL_INFO_BRIDGE mode 



There is currently no support for the multicast/broadcast aspects
of VXLAN in ovs. In the datapath flow the tun_dst must specific.
But in the IP_TUNNEL_INFO_BRIDGE mode the tun_dst can not be specific.
And the packet can forward through the fdb table of vxlan devcice. In
this mode the broadcast/multicast packet can be sent through the
following ways in ovs.

ovs-vsctl add-port br0 vxlan -- set in vxlan type=vxlan \
        options:key=1000 options:remote_ip=flow
ovs-ofctl add-flow br0 in_port=LOCAL,dl_dst=ff:ff:ff:ff:ff:ff, \
        action=output:vxlan

bridge fdb append ff:ff:ff:ff:ff:ff dev vxlan_sys_4789 dst 172.168.0.1 \
        src_vni 1000 vni 1000 self
bridge fdb append ff:ff:ff:ff:ff:ff dev vxlan_sys_4789 dst 172.168.0.2 \
        src_vni 1000 vni 1000 self

Signed-off-by: default avatarwenxu <wenxu@ucloud.cn>
Acked-by: default avatarPravin B Shelar <pshelar@ovn.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eb70a1ae

include/uapi/linux/openvswitch.h

+1 −0
Original line number Diff line number Diff line
@@ -364,6 +364,7 @@ enum ovs_tunnel_key_attr { 
	OVS_TUNNEL_KEY_ATTR_IPV6_DST,		/* struct in6_addr dst IPv6 address. */

	OVS_TUNNEL_KEY_ATTR_PAD,

	OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,	/* struct erspan_metadata */

	OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE,	/* No argument. IPV4_INFO_BRIDGE mode.*/

	__OVS_TUNNEL_KEY_ATTR_MAX

};

net/openvswitch/flow_netlink.c

+36 −10
Original line number Diff line number Diff line
@@ -404,6 +404,7 @@ static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] 
	[OVS_TUNNEL_KEY_ATTR_IPV6_SRC]      = { .len = sizeof(struct in6_addr) },

	[OVS_TUNNEL_KEY_ATTR_IPV6_DST]      = { .len = sizeof(struct in6_addr) },

	[OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS]   = { .len = OVS_ATTR_VARIABLE },

	[OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE]   = { .len = 0 },

};



static const struct ovs_len_tbl
@@ -667,6 +668,7 @@ static int ip_tun_from_nlattr(const struct nlattr *attr, 
			      bool log)

{

	bool ttl = false, ipv4 = false, ipv6 = false;

	bool info_bridge_mode = false;

	__be16 tun_flags = 0;

	int opts_type = 0;

	struct nlattr *a;
@@ -783,6 +785,10 @@ static int ip_tun_from_nlattr(const struct nlattr *attr, 
			tun_flags |= TUNNEL_ERSPAN_OPT;

			opts_type = type;

			break;

		case OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE:

			info_bridge_mode = true;

			ipv4 = true;

			break;

		default:

			OVS_NLERR(log, "Unknown IP tunnel attribute %d",

				  type);
@@ -813,16 +819,29 @@ static int ip_tun_from_nlattr(const struct nlattr *attr, 
			OVS_NLERR(log, "IP tunnel dst address not specified");

			return -EINVAL;

		}

		if (ipv4 && !match->key->tun_key.u.ipv4.dst) {

		if (ipv4) {

			if (info_bridge_mode) {

				if (match->key->tun_key.u.ipv4.src ||

				    match->key->tun_key.u.ipv4.dst ||

				    match->key->tun_key.tp_src ||

				    match->key->tun_key.tp_dst ||

				    match->key->tun_key.ttl ||

				    match->key->tun_key.tos ||

				    tun_flags & ~TUNNEL_KEY) {

					OVS_NLERR(log, "IPv4 tun info is not correct");

					return -EINVAL;

				}

			} else if (!match->key->tun_key.u.ipv4.dst) {

				OVS_NLERR(log, "IPv4 tunnel dst address is zero");

				return -EINVAL;

			}

		}

		if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {

			OVS_NLERR(log, "IPv6 tunnel dst address is zero");

			return -EINVAL;

		}



		if (!ttl) {

		if (!ttl && !info_bridge_mode) {

			OVS_NLERR(log, "IP tunnel TTL not specified.");

			return -EINVAL;

		}
@@ -851,12 +870,17 @@ static int vxlan_opt_to_nlattr(struct sk_buff *skb, 
static int __ip_tun_to_nlattr(struct sk_buff *skb,

			      const struct ip_tunnel_key *output,

			      const void *tun_opts, int swkey_tun_opts_len,

			      unsigned short tun_proto)

			      unsigned short tun_proto, u8 mode)

{

	if (output->tun_flags & TUNNEL_KEY &&

	    nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,

			 OVS_TUNNEL_KEY_ATTR_PAD))

		return -EMSGSIZE;



	if (mode & IP_TUNNEL_INFO_BRIDGE)

		return nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE)

		       ? -EMSGSIZE : 0;



	switch (tun_proto) {

	case AF_INET:

		if (output->u.ipv4.src &&
@@ -919,7 +943,7 @@ static int __ip_tun_to_nlattr(struct sk_buff *skb, 
static int ip_tun_to_nlattr(struct sk_buff *skb,

			    const struct ip_tunnel_key *output,

			    const void *tun_opts, int swkey_tun_opts_len,

			    unsigned short tun_proto)

			    unsigned short tun_proto, u8 mode)

{

	struct nlattr *nla;

	int err;
@@ -929,7 +953,7 @@ static int ip_tun_to_nlattr(struct sk_buff *skb, 
		return -EMSGSIZE;



	err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,

				 tun_proto);

				 tun_proto, mode);

	if (err)

		return err;
@@ -943,7 +967,7 @@ int ovs_nla_put_tunnel_info(struct sk_buff *skb, 
	return __ip_tun_to_nlattr(skb, &tun_info->key,

				  ip_tunnel_info_opts(tun_info),

				  tun_info->options_len,

				  ip_tunnel_info_af(tun_info));

				  ip_tunnel_info_af(tun_info), tun_info->mode);

}



static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
@@ -1981,7 +2005,7 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey, 
			opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);



		if (ip_tun_to_nlattr(skb, &output->tun_key, opts,

				     swkey->tun_opts_len, swkey->tun_proto))

				     swkey->tun_opts_len, swkey->tun_proto, 0))

			goto nla_put_failure;

	}
@@ -2606,6 +2630,8 @@ static int validate_and_copy_set_tun(const struct nlattr *attr, 
	tun_info->mode = IP_TUNNEL_INFO_TX;

	if (key.tun_proto == AF_INET6)

		tun_info->mode |= IP_TUNNEL_INFO_IPV6;

	else if (key.tun_proto == AF_INET && key.tun_key.u.ipv4.dst == 0)

		tun_info->mode |= IP_TUNNEL_INFO_BRIDGE;

	tun_info->key = key.tun_key;



	/* We need to store the options in the action itself since
@@ -3367,7 +3393,7 @@ static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) 
		err =  ip_tun_to_nlattr(skb, &tun_info->key,

					ip_tunnel_info_opts(tun_info),

					tun_info->options_len,

					ip_tunnel_info_af(tun_info));

					ip_tunnel_info_af(tun_info), tun_info->mode);

		if (err)

			return err;

		nla_nest_end(skb, start);

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