diff options
| author |   Martin KaFai Lau <kafai@fb.com> | 2015-04-28 13:03:05 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-05-01 20:57:06 -0400 |
| commit | 653437d02f1f12d528c290e64f6dc54be1224db2 (patch) | |
| tree | a6d964f38eaeeb0933f5019ac3be45b546b96163 /net/ipv6/route.c | |
| parent | ipv6: Extend the route lookups to low priority metrics. (diff) | |
| download | linux-dev-653437d02f1f12d528c290e64f6dc54be1224db2.tar.xz linux-dev-653437d02f1f12d528c290e64f6dc54be1224db2.zip | |
ipv6: Stop /128 route from disappearing after pmtu update
This patch is mostly from Steffen Klassert <steffen.klassert@secunet.com>.
I only removed the (rt6->rt6i_dst.plen == 128) check from
ip6_rt_update_pmtu() because the (rt6->rt6i_flags & RTF_CACHE) test
has already implied it.
This patch:
1. Create RTF_CACHE route for /128 non local route
2. After (1), all routes that allow pmtu update should have a RTF_CACHE
clone. Hence, stop updating MTU for any non RTF_CACHE route.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/ipv6/route.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 07562a2702c9..aa4cfdd13f28 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -977,7 +977,7 @@ redo_rt6_select: if (!(rt->rt6i_flags & (RTF_NONEXTHOP | RTF_GATEWAY))) nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr); - else if (!(rt->dst.flags & DST_HOST)) + else if (!(rt->dst.flags & DST_HOST) || !(rt->dst.flags & RTF_LOCAL)) nrt = rt6_alloc_clone(rt, &fl6->daddr); else goto out2; @@ -1172,7 +1172,7 @@ static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, struct rt6_info *rt6 = (struct rt6_info *)dst; dst_confirm(dst); - if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) { + if (mtu < dst_mtu(dst) && (rt6->rt6i_flags & RTF_CACHE)) { struct net *net = dev_net(dst->dev); rt6->rt6i_flags |= RTF_MODIFIED; |