diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2017-03-25 01:21:56 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-28 00:09:50 +0300 |
| commit | c00e51ddbfda73d2be6d61fea2e58aeb57527475 (patch) | |
| tree | f6cacc9602da0fbb978b1f87124766990d034803 /net/mpls/af_mpls.c | |
| parent | 88275ed0cb3ac89ed869a925337b951801b154d7 (diff) | |
| download | linux-c00e51ddbfda73d2be6d61fea2e58aeb57527475.tar.xz | |
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>
Diffstat (limited to 'net/mpls/af_mpls.c')
| -rw-r--r-- | net/mpls/af_mpls.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c index cd8be8d5e4ad..3861f8dfa9c1 100644 --- a/net/mpls/af_mpls.c +++ b/net/mpls/af_mpls.c @@ -1769,13 +1769,15 @@ static int mpls_dump_route(struct sk_buff *skb, u32 portid, u32 seq, int event, goto nla_put_failure; for_nexthops(rt) { + dev = rtnl_dereference(nh->nh_dev); + if (!dev) + continue; + rtnh = nla_reserve_nohdr(skb, sizeof(*rtnh)); if (!rtnh) goto nla_put_failure; - dev = rtnl_dereference(nh->nh_dev); - if (dev) - rtnh->rtnh_ifindex = dev->ifindex; + rtnh->rtnh_ifindex = dev->ifindex; if (nh->nh_flags & RTNH_F_LINKDOWN) { rtnh->rtnh_flags |= RTNH_F_LINKDOWN; linkdown++; |