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Commit 919aa0b2 authored by Alex Gartrell's avatar Alex Gartrell Committed by Simon Horman
Browse files

ipvs: Pull out update_pmtu code 



Another step toward heterogeneous pools, this removes another piece of
functionality currently specific to each address family type.

Signed-off-by: default avatarAlex Gartrell <agartrell@fb.com>
Acked-by: default avatarJulian Anastasov <ja@ssi.bg>
Signed-off-by: default avatarSimon Horman <horms@verge.net.au>
parent 4a4739d5

net/netfilter/ipvs/ip_vs_xmit.c

+11 −12
Original line number Diff line number Diff line
@@ -204,6 +204,15 @@ static inline bool crosses_local_route_boundary(int skb_af, struct sk_buff *skb, 
	return false;

}



static inline void maybe_update_pmtu(int skb_af, struct sk_buff *skb, int mtu)

{

	struct sock *sk = skb->sk;

	struct rtable *ort = skb_rtable(skb);



	if (!skb->dev && sk && sk->sk_state != TCP_TIME_WAIT)

		ort->dst.ops->update_pmtu(&ort->dst, sk, NULL, mtu);

}



/* Get route to destination or remote server */

static int

__ip_vs_get_out_rt(int skb_af, struct sk_buff *skb, struct ip_vs_dest *dest,
@@ -213,7 +222,6 @@ __ip_vs_get_out_rt(int skb_af, struct sk_buff *skb, struct ip_vs_dest *dest, 
	struct netns_ipvs *ipvs = net_ipvs(net);

	struct ip_vs_dest_dst *dest_dst;

	struct rtable *rt;			/* Route to the other host */

	struct rtable *ort;			/* Original route */

	struct iphdr *iph;

	__be16 df;

	int mtu;
@@ -284,16 +292,12 @@ __ip_vs_get_out_rt(int skb_af, struct sk_buff *skb, struct ip_vs_dest *dest, 
		mtu = dst_mtu(&rt->dst);

		df = iph->frag_off & htons(IP_DF);

	} else {

		struct sock *sk = skb->sk;



		mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr);

		if (mtu < 68) {

			IP_VS_DBG_RL("%s(): mtu less than 68\n", __func__);

			goto err_put;

		}

		ort = skb_rtable(skb);

		if (!skb->dev && sk && sk->sk_state != TCP_TIME_WAIT)

			ort->dst.ops->update_pmtu(&ort->dst, sk, NULL, mtu);

		maybe_update_pmtu(skb_af, skb, mtu);

		/* MTU check allowed? */

		df = sysctl_pmtu_disc(ipvs) ? iph->frag_off & htons(IP_DF) : 0;

	}
@@ -372,7 +376,6 @@ __ip_vs_get_out_rt_v6(int skb_af, struct sk_buff *skb, struct ip_vs_dest *dest, 
	struct net *net = dev_net(skb_dst(skb)->dev);

	struct ip_vs_dest_dst *dest_dst;

	struct rt6_info *rt;			/* Route to the other host */

	struct rt6_info *ort;			/* Original route */

	struct dst_entry *dst;

	int mtu;

	int local, noref = 1;
@@ -438,17 +441,13 @@ __ip_vs_get_out_rt_v6(int skb_af, struct sk_buff *skb, struct ip_vs_dest *dest, 
	if (likely(!(rt_mode & IP_VS_RT_MODE_TUNNEL)))

		mtu = dst_mtu(&rt->dst);

	else {

		struct sock *sk = skb->sk;



		mtu = dst_mtu(&rt->dst) - sizeof(struct ipv6hdr);

		if (mtu < IPV6_MIN_MTU) {

			IP_VS_DBG_RL("%s(): mtu less than %d\n", __func__,

				     IPV6_MIN_MTU);

			goto err_put;

		}

		ort = (struct rt6_info *) skb_dst(skb);

		if (!skb->dev && sk && sk->sk_state != TCP_TIME_WAIT)

			ort->dst.ops->update_pmtu(&ort->dst, sk, NULL, mtu);

		maybe_update_pmtu(skb_af, skb, mtu);

	}



	if (unlikely(__mtu_check_toobig_v6(skb, mtu))) {