net: mpls: Don't show nexthop if device has been deleted
authorDavid Ahern <dsa@cumulusnetworks.com>
Fri, 24 Mar 2017 22:21:56 +0000 (15:21 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 27 Mar 2017 21:09:50 +0000 (14:09 -0700)
commitc00e51ddbfda73d2be6d61fea2e58aeb57527475
treef6cacc9602da0fbb978b1f87124766990d034803
parent88275ed0cb3ac89ed869a925337b951801b154d7
net: mpls: Don't show nexthop if device has been deleted

If the device for a nexthop in a multipath route is deleted, the nexthop
is effectively removed from the route. Currently, a route dump still
returns the nexhop though without the device set:

$ ip -f mpls ro ls
100
nexthopvia inet 10.11.1.2  dev br0
nexthopvia inet 10.100.3.1  dev eth3
$ ip li del br0
$ ip -f mpls ro ls
100
nexthopvia inet 10.11.1.2  dev * dead linkdown
nexthopvia inet 10.100.3.1  dev eth3

Since the nexthop is effectively deleted, drop the hop from the route
dump.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/mpls/af_mpls.c