[PATCH next 2/3] blackhole_netdev: use blackhole_netdev to invalidate dst entries
From: Mahesh Bandewar <hidden>
Date: 2019-06-22 00:45:47
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
Use blackhole_netdev instead of 'lo' device with lower MTU when marking dst "dead". Signed-off-by: Mahesh Bandewar <redacted> --- net/core/dst.c | 2 +- net/ipv4/route.c | 3 +-- net/ipv6/route.c | 2 +- 3 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/net/core/dst.c b/net/core/dst.c
index e46366228eaf..1325316d9eab 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c@@ -160,7 +160,7 @@ void dst_dev_put(struct dst_entry *dst) dst->ops->ifdown(dst, dev, true); dst->input = dst_discard; dst->output = dst_discard_out; - dst->dev = dev_net(dst->dev)->loopback_dev; + dst->dev = blackhole_netdev; dev_hold(dst->dev); dev_put(dev); }
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 66cbe8a7a168..049af0f88307 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c@@ -1532,7 +1532,6 @@ static void ipv4_dst_destroy(struct dst_entry *dst) void rt_flush_dev(struct net_device *dev) { - struct net *net = dev_net(dev); struct rtable *rt; int cpu;
@@ -1543,7 +1542,7 @@ void rt_flush_dev(struct net_device *dev) list_for_each_entry(rt, &ul->head, rt_uncached) { if (rt->dst.dev != dev) continue; - rt->dst.dev = net->loopback_dev; + rt->dst.dev = blackhole_netdev; dev_hold(rt->dst.dev); dev_put(dev); }
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index c4d285fe0adc..335bcf812b25 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c@@ -176,7 +176,7 @@ static void rt6_uncached_list_flush_dev(struct net *net, struct net_device *dev) } if (rt_dev == dev) { - rt->dst.dev = loopback_dev; + rt->dst.dev = blackhole_netdev; dev_hold(rt->dst.dev); dev_put(rt_dev); }
--
2.22.0.410.gd8fdbe21b5-goog