Commit 6bcc27ab authored Jun 11, 2018 by Julian Anastasov Committed by Greg Kroah-Hartman Jun 26, 2018

ipv6: allow PMTU exceptions to local routes



[ Upstream commit 09757646 ]

IPVS setups with local client and remote tunnel server need
to create exception for the local virtual IP. What we do is to
change PMTU from 64KB (on "lo") to 1460 in the common case.

Suggested-by: Martin KaFai Lau <kafai@fb.com>
Fixes: 45e4fd26 ("ipv6: Only create RTF_CACHE routes after encountering pmtu exception")
Fixes: 7343ff31 ("ipv6: Don't create clones of host routes.")
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: David Ahern <dsahern@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 6e48ee02

net/ipv6/route.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -1476,9 +1476,6 @@ static void __ip6_rt_update_pmtu(struct dst_entry dst, const struct sock sk,
		const struct in6_addr daddr, saddr;
		struct rt6_info rt6 = (struct rt6_info )dst;

		if (rt6->rt6i_flags & RTF_LOCAL)
		return;

		if (dst_metric_locked(dst, RTAX_MTU))
		return;