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net: track link status of ipv6 nexthops

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Add support to track current link status of ipv6 nexthops to match
recent changes that added support for ipv4 nexthops.  This takes a
simple approach to track linkdown status for next-hops and simply
checks the dev for the dst entry and sets proper flags that to be used
in the netlink message.

v2: drop use of rt6i_nhflags since it is not needed right now

Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: Dinesh Dutt <ddutt@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Gospodarek 2015-08-13 10:39:00 -04:00 committed by David S. Miller
parent 8e3d04fd7d
commit cea45e208d
1 changed files with 2 additions and 0 deletions
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2
net/ipv6/route.c
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@ -2887,6 +2887,8 @@ static int rt6_fill_node(struct net *net,
else
rtm->rtm_type = RTN_UNICAST;
rtm->rtm_flags = 0;
if (!netif_carrier_ok(rt->dst.dev))
rtm->rtm_flags |= RTNH_F_LINKDOWN;
rtm->rtm_scope = RT_SCOPE_UNIVERSE;
rtm->rtm_protocol = rt->rt6i_protocol;
if (rt->rt6i_flags & RTF_DYNAMIC)