diff options
| author | Martin KaFai Lau <kafai@fb.com> | 2015-02-12 16:14:08 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-14 20:26:16 -0800 |
| commit | 3b4711757d7903ab6fa88a9e7ab8901b8227da60 (patch) | |
| tree | 2740f90014daaea4e8f94a664016deb934f6813a | |
| parent | 26ad0b83587fb6e9a20eef388b0587ada3da5d06 (diff) | |
| download | op-kernel-dev-3b4711757d7903ab6fa88a9e7ab8901b8227da60.zip op-kernel-dev-3b4711757d7903ab6fa88a9e7ab8901b8227da60.tar.gz | |
ipv6: fix ipv6_cow_metrics for non DST_HOST case
ipv6_cow_metrics() currently assumes only DST_HOST routes require
dynamic metrics allocation from inetpeer. The assumption breaks
when ndisc discovered router with RTAX_MTU and RTAX_HOPLIMIT metric.
Refer to ndisc_router_discovery() in ndisc.c and note that dst_metric_set()
is called after the route is created.
This patch creates the metrics array (by calling dst_cow_metrics_generic) in
ipv6_cow_metrics().
Test:
radvd.conf:
interface qemubr0
{
AdvLinkMTU 1300;
AdvCurHopLimit 30;
prefix fd00:face:face:face::/64
{
AdvOnLink on;
AdvAutonomous on;
AdvRouterAddr off;
};
};
Before:
[root@qemu1 ~]# ip -6 r show | egrep -v unreachable
fd00:face:face:face::/64 dev eth0 proto kernel metric 256 expires 27sec
fe80::/64 dev eth0 proto kernel metric 256
default via fe80::74df:d0ff:fe23:8ef2 dev eth0 proto ra metric 1024 expires 27sec
After:
[root@qemu1 ~]# ip -6 r show | egrep -v unreachable
fd00:face:face:face::/64 dev eth0 proto kernel metric 256 expires 27sec mtu 1300
fe80::/64 dev eth0 proto kernel metric 256 mtu 1300
default via fe80::74df:d0ff:fe23:8ef2 dev eth0 proto ra metric 1024 expires 27sec mtu 1300 hoplimit 30
Fixes: 8e2ec639173f325 (ipv6: don't use inetpeer to store metrics for routes.)
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 98565ce..4688bd4 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -141,7 +141,7 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) u32 *p = NULL; if (!(rt->dst.flags & DST_HOST)) - return NULL; + return dst_cow_metrics_generic(dst, old); peer = rt6_get_peer_create(rt); if (peer) { |
