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geneve: allow user to specify TOS info for tunnel frames
Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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8760ce5835
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@ -46,6 +46,7 @@ struct geneve_dev {
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struct geneve_sock *sock; /* socket used for geneve tunnel */
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u8 vni[3]; /* virtual network ID for tunnel */
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u8 ttl; /* TTL override */
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u8 tos; /* TOS override */
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struct sockaddr_in remote; /* IPv4 address for link partner */
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struct list_head next; /* geneve's per namespace list */
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};
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@ -194,7 +195,12 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
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/* TODO: port min/max limits should be configurable */
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sport = udp_flow_src_port(dev_net(dev), skb, 0, 0, true);
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tos = geneve->tos;
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if (tos == 1)
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tos = ip_tunnel_get_dsfield(iip, skb);
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memset(&fl4, 0, sizeof(fl4));
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fl4.flowi4_tos = RT_TOS(tos);
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fl4.daddr = geneve->remote.sin_addr.s_addr;
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rt = ip_route_output_key(geneve->net, &fl4);
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if (IS_ERR(rt)) {
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@ -208,9 +214,7 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
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goto rt_tx_error;
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}
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/* TODO: tos should be configurable */
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tos = ip_tunnel_ecn_encap(0, iip, skb);
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tos = ip_tunnel_ecn_encap(tos, iip, skb);
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ttl = geneve->ttl;
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if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
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@ -300,6 +304,7 @@ static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
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[IFLA_GENEVE_ID] = { .type = NLA_U32 },
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[IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
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[IFLA_GENEVE_TTL] = { .type = NLA_U8 },
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[IFLA_GENEVE_TOS] = { .type = NLA_U8 },
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};
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static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
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@ -370,6 +375,9 @@ static int geneve_newlink(struct net *net, struct net_device *dev,
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if (data[IFLA_GENEVE_TTL])
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geneve->ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
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if (data[IFLA_GENEVE_TOS])
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geneve->tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
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list_add(&geneve->next, &gn->geneve_list);
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hlist_add_head_rcu(&geneve->hlist, &gn->vni_list[hash]);
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@ -393,6 +401,7 @@ static size_t geneve_get_size(const struct net_device *dev)
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return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
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nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */
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nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
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nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
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0;
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}
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@ -409,7 +418,8 @@ static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
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geneve->remote.sin_addr.s_addr))
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goto nla_put_failure;
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if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl))
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if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
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nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos))
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goto nla_put_failure;
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return 0;
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@ -396,6 +396,7 @@ enum {
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IFLA_GENEVE_ID,
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IFLA_GENEVE_REMOTE,
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IFLA_GENEVE_TTL,
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IFLA_GENEVE_TOS,
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__IFLA_GENEVE_MAX
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};
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#define IFLA_GENEVE_MAX (__IFLA_GENEVE_MAX - 1)
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