lwtunnel: remove source and destination UDP port config option

The UDP tunnel config is asymmetric wrt. to the ports used. The source and
destination ports from one direction of the tunnel are not related to the
ports of the other direction. We need to be able to respond to ARP requests
using the correct ports without involving routing.

As the consequence, UDP ports need to be fixed property of the tunnel
interface and cannot be set per route. Remove the ability to set ports per
route. This is still okay to do, as no kernel has been released with these
attributes yet.

Note that the ability to specify source and destination ports is preserved
for other users of the lwtunnel API which don't use routes for tunnel key
specification (like openvswitch).

If in the future we rework ARP handling to allow port specification, the
attributes can be added back.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/lwtunnel.h b/include/uapi/linux/lwtunnel.h
index 34141a5dfe745877d1e3905373a2255e93b888ab..f8b01887a4958097c9c2fede065391c553683e80 100644 (file)
--- a/include/uapi/linux/lwtunnel.h
+++ b/include/uapi/linux/lwtunnel.h
@@ -21,8 +21,6 @@ enum lwtunnel_ip_t {
        LWTUNNEL_IP_SRC,
        LWTUNNEL_IP_TTL,
        LWTUNNEL_IP_TOS,
-       LWTUNNEL_IP_SPORT,
-       LWTUNNEL_IP_DPORT,
        LWTUNNEL_IP_FLAGS,
        __LWTUNNEL_IP_MAX,
 };
@@ -36,8 +34,6 @@ enum lwtunnel_ip6_t {
        LWTUNNEL_IP6_SRC,
        LWTUNNEL_IP6_HOPLIMIT,
        LWTUNNEL_IP6_TC,
-       LWTUNNEL_IP6_SPORT,
-       LWTUNNEL_IP6_DPORT,
        LWTUNNEL_IP6_FLAGS,
        __LWTUNNEL_IP6_MAX,
 };

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index ce3a1e728606b6e386cd798c88669703ab9e6d36..84dce6a92f93bec35158b392477c536d6f2f1529 100644 (file)
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -226,8 +226,6 @@ static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = {
        [LWTUNNEL_IP_SRC]       = { .type = NLA_U32 },
        [LWTUNNEL_IP_TTL]       = { .type = NLA_U8 },
        [LWTUNNEL_IP_TOS]       = { .type = NLA_U8 },
-       [LWTUNNEL_IP_SPORT]     = { .type = NLA_U16 },
-       [LWTUNNEL_IP_DPORT]     = { .type = NLA_U16 },
        [LWTUNNEL_IP_FLAGS]     = { .type = NLA_U16 },
 };
 
@@ -267,12 +265,6 @@ static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr,
        if (tb[LWTUNNEL_IP_TOS])
                tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]);
 
-       if (tb[LWTUNNEL_IP_SPORT])
-               tun_info->key.tp_src = nla_get_be16(tb[LWTUNNEL_IP_SPORT]);
-
-       if (tb[LWTUNNEL_IP_DPORT])
-               tun_info->key.tp_dst = nla_get_be16(tb[LWTUNNEL_IP_DPORT]);
-
        if (tb[LWTUNNEL_IP_FLAGS])
                tun_info->key.tun_flags = nla_get_u16(tb[LWTUNNEL_IP_FLAGS]);
 
@@ -294,8 +286,6 @@ static int ip_tun_fill_encap_info(struct sk_buff *skb,
            nla_put_be32(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) ||
            nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) ||
            nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) ||
-           nla_put_u16(skb, LWTUNNEL_IP_SPORT, tun_info->key.tp_src) ||
-           nla_put_u16(skb, LWTUNNEL_IP_DPORT, tun_info->key.tp_dst) ||
            nla_put_u16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags))
                return -ENOMEM;
 
@@ -309,8 +299,6 @@ static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
                + nla_total_size(4)     /* LWTUNNEL_IP_SRC */
                + nla_total_size(1)     /* LWTUNNEL_IP_TOS */
                + nla_total_size(1)     /* LWTUNNEL_IP_TTL */
-               + nla_total_size(2)     /* LWTUNNEL_IP_SPORT */
-               + nla_total_size(2)     /* LWTUNNEL_IP_DPORT */
                + nla_total_size(2);    /* LWTUNNEL_IP_FLAGS */
 }
 
@@ -333,8 +321,6 @@ static const struct nla_policy ip6_tun_policy[LWTUNNEL_IP6_MAX + 1] = {
        [LWTUNNEL_IP6_SRC]              = { .len = sizeof(struct in6_addr) },
        [LWTUNNEL_IP6_HOPLIMIT]         = { .type = NLA_U8 },
        [LWTUNNEL_IP6_TC]               = { .type = NLA_U8 },
-       [LWTUNNEL_IP6_SPORT]            = { .type = NLA_U16 },
-       [LWTUNNEL_IP6_DPORT]            = { .type = NLA_U16 },
        [LWTUNNEL_IP6_FLAGS]            = { .type = NLA_U16 },
 };
 
@@ -374,12 +360,6 @@ static int ip6_tun_build_state(struct net_device *dev, struct nlattr *attr,
        if (tb[LWTUNNEL_IP6_TC])
                tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]);
 
-       if (tb[LWTUNNEL_IP6_SPORT])
-               tun_info->key.tp_src = nla_get_be16(tb[LWTUNNEL_IP6_SPORT]);
-
-       if (tb[LWTUNNEL_IP6_DPORT])
-               tun_info->key.tp_dst = nla_get_be16(tb[LWTUNNEL_IP6_DPORT]);
-
        if (tb[LWTUNNEL_IP6_FLAGS])
                tun_info->key.tun_flags = nla_get_u16(tb[LWTUNNEL_IP6_FLAGS]);
 
@@ -401,8 +381,6 @@ static int ip6_tun_fill_encap_info(struct sk_buff *skb,
            nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) ||
            nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.tos) ||
            nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.ttl) ||
-           nla_put_u16(skb, LWTUNNEL_IP6_SPORT, tun_info->key.tp_src) ||
-           nla_put_u16(skb, LWTUNNEL_IP6_DPORT, tun_info->key.tp_dst) ||
            nla_put_u16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags))
                return -ENOMEM;
 
@@ -416,8 +394,6 @@ static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
                + nla_total_size(16)    /* LWTUNNEL_IP6_SRC */
                + nla_total_size(1)     /* LWTUNNEL_IP6_HOPLIMIT */
                + nla_total_size(1)     /* LWTUNNEL_IP6_TC */
-               + nla_total_size(2)     /* LWTUNNEL_IP6_SPORT */
-               + nla_total_size(2)     /* LWTUNNEL_IP6_DPORT */
                + nla_total_size(2);    /* LWTUNNEL_IP6_FLAGS */
 }