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Message-Id: <1369628193-14925-10-git-send-email-amwang@redhat.com>
Date: Mon, 27 May 2013 12:16:31 +0800
From: Cong Wang <amwang@...hat.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
David Stevens <dlstevens@...ibm.com>,
Cong Wang <amwang@...hat.com>
Subject: [Patch net-next v9 09/11] vxlan: add ipv6 proxy support
From: Cong Wang <amwang@...hat.com>
This patch adds the IPv6 version of "arp_reduce", ndisc_send_na()
will be needed.
Cc: David S. Miller <davem@...emloft.net>
Cc: David Stevens <dlstevens@...ibm.com>
Signed-off-by: Cong Wang <amwang@...hat.com>
---
drivers/net/vxlan.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++-
include/net/addrconf.h | 4 ++
include/net/ndisc.h | 5 +++
net/ipv6/af_inet6.c | 1 +
net/ipv6/ndisc.c | 8 ++--
5 files changed, 93 insertions(+), 6 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 1a1706f..4c9709e 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1062,6 +1062,76 @@ out:
return NETDEV_TX_OK;
}
+#if IS_ENABLED(CONFIG_IPV6)
+static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
+{
+ struct vxlan_dev *vxlan = netdev_priv(dev);
+ struct neighbour *n;
+ union vxlan_addr ipa;
+ const struct ipv6hdr *iphdr;
+ const struct in6_addr *saddr, *daddr;
+ struct nd_msg *msg;
+ struct inet6_dev *in6_dev = NULL;
+
+ in6_dev = in6_dev_get(dev);
+ if (!in6_dev)
+ goto consume;
+
+ if (skb->len < sizeof(struct ipv6hdr) + sizeof(struct nd_msg) ||
+ !pskb_may_pull(skb, skb->len))
+ goto out;
+
+ iphdr = ipv6_hdr(skb);
+ saddr = &iphdr->saddr;
+ daddr = &iphdr->daddr;
+
+ if (iphdr->nexthdr != IPPROTO_ICMPV6)
+ goto out;
+
+ if (ipv6_addr_loopback(daddr) ||
+ ipv6_addr_is_multicast(daddr))
+ goto out;
+
+ msg = (struct nd_msg *)skb_transport_header(skb);
+ if (msg->icmph.icmp6_code != 0 ||
+ msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
+ goto out;
+
+ n = neigh_lookup(&nd_tbl, daddr, dev);
+
+ if (n) {
+ struct vxlan_fdb *f;
+
+ if (!(n->nud_state & NUD_CONNECTED)) {
+ neigh_release(n);
+ goto out;
+ }
+
+ f = vxlan_find_mac(vxlan, n->ha);
+ if (f && vxlan_addr_any(&f->remote.remote_ip)) {
+ /* bridge-local neighbor */
+ neigh_release(n);
+ goto out;
+ }
+
+ ipv6_stub->ndisc_send_na(dev, n, saddr, &msg->target,
+ !!in6_dev->cnf.forwarding,
+ true, false, false);
+ neigh_release(n);
+ } else if (vxlan->flags & VXLAN_F_L3MISS) {
+ ipa.sin6.sin6_addr = *daddr;
+ ipa.sa.sa_family = AF_INET6;
+ vxlan_ip_miss(dev, &ipa);
+ }
+
+out:
+ in6_dev_put(in6_dev);
+consume:
+ consume_skb(skb);
+ return NETDEV_TX_OK;
+}
+#endif
+
static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
{
struct vxlan_dev *vxlan = netdev_priv(dev);
@@ -1478,8 +1548,15 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
skb_reset_mac_header(skb);
eth = eth_hdr(skb);
- if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP)
- return arp_reduce(dev, skb);
+ if ((vxlan->flags & VXLAN_F_PROXY)) {
+ if (ntohs(eth->h_proto) == ETH_P_ARP)
+ return arp_reduce(dev, skb);
+#if IS_ENABLED(CONFIG_IPV6)
+ else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
+ ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6)
+ return neigh_reduce(dev, skb);
+#endif
+ }
f = vxlan_find_mac(vxlan, eth->h_dest);
did_rsc = false;
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index d09d42c..34bccff 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -151,6 +151,10 @@ struct ipv6_stub {
int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
struct flowi6 *fl6);
void (*udpv6_encap_enable)(void);
+ void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
+ const struct in6_addr *daddr,
+ const struct in6_addr *solicited_addr,
+ bool router, bool solicited, bool override, bool inc_opt);
};
extern const struct ipv6_stub *ipv6_stub __read_mostly;
diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 745bf74..ec2da56 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -204,6 +204,11 @@ extern void ndisc_send_ns(struct net_device *dev,
extern void ndisc_send_rs(struct net_device *dev,
const struct in6_addr *saddr,
const struct in6_addr *daddr);
+extern void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
+ const struct in6_addr *daddr,
+ const struct in6_addr *solicited_addr,
+ bool router, bool solicited, bool override,
+ bool inc_opt);
extern void ndisc_send_redirect(struct sk_buff *skb,
const struct in6_addr *target);
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index cf34d4a..5bc0ca8 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -814,6 +814,7 @@ static const struct ipv6_stub ipv6_stub_impl = {
.ipv6_sock_mc_drop = ipv6_sock_mc_drop,
.ipv6_dst_lookup = ip6_dst_lookup,
.udpv6_encap_enable = udpv6_encap_enable,
+ .ndisc_send_na = ndisc_send_na,
};
static int __init inet6_init(void)
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 2712ab2..a17e4d0 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -462,10 +462,10 @@ static void ndisc_send_skb(struct sk_buff *skb,
rcu_read_unlock();
}
-static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
- const struct in6_addr *daddr,
- const struct in6_addr *solicited_addr,
- bool router, bool solicited, bool override, bool inc_opt)
+void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
+ const struct in6_addr *daddr,
+ const struct in6_addr *solicited_addr,
+ bool router, bool solicited, bool override, bool inc_opt)
{
struct sk_buff *skb;
struct in6_addr tmpaddr;
--
1.7.7.6
--
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