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| author | David S. Miller <davem@davemloft.net> | 2010-10-04 11:56:38 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-04 11:56:38 -0700 |
| commit | 21a180cda012e1f93e362dd4a9b0bfd3d8c92940 (patch) | |
| tree | 0e0d10baa3fdcd8ffbc6881076ff1695808dad9d /net/ipv6 | |
| parent | c7d4426a98a5f6654cd0b4b33d9dab2e77192c18 (diff) | |
| parent | 51e97a12bef19b7e43199fc153cf9bd5f2140362 (diff) | |
| download | linux-21a180cda012e1f93e362dd4a9b0bfd3d8c92940.tar.bz2 | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
net/ipv4/Kconfig
net/ipv4/tcp_timer.c
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/route.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 25476e7e708b..17e217933885 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -670,7 +670,7 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad if (net_ratelimit()) printk(KERN_WARNING - "Neighbour table overflow.\n"); + "ipv6: Neighbour table overflow.\n"); dst_free(&rt->dst); return NULL; } @@ -1559,14 +1559,13 @@ out: * i.e. Path MTU discovery */ -void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr, - struct net_device *dev, u32 pmtu) +static void rt6_do_pmtu_disc(struct in6_addr *daddr, struct in6_addr *saddr, + struct net *net, u32 pmtu, int ifindex) { struct rt6_info *rt, *nrt; - struct net *net = dev_net(dev); int allfrag = 0; - rt = rt6_lookup(net, daddr, saddr, dev->ifindex, 0); + rt = rt6_lookup(net, daddr, saddr, ifindex, 0); if (rt == NULL) return; @@ -1634,6 +1633,27 @@ out: dst_release(&rt->dst); } +void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr, + struct net_device *dev, u32 pmtu) +{ + struct net *net = dev_net(dev); + + /* + * RFC 1981 states that a node "MUST reduce the size of the packets it + * is sending along the path" that caused the Packet Too Big message. + * Since it's not possible in the general case to determine which + * interface was used to send the original packet, we update the MTU + * on the interface that will be used to send future packets. We also + * update the MTU on the interface that received the Packet Too Big in + * case the original packet was forced out that interface with + * SO_BINDTODEVICE or similar. This is the next best thing to the + * correct behaviour, which would be to update the MTU on all + * interfaces. + */ + rt6_do_pmtu_disc(daddr, saddr, net, pmtu, 0); + rt6_do_pmtu_disc(daddr, saddr, net, pmtu, dev->ifindex); +} + /* * Misc support functions */ |