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authorXin Long <lucien.xin@gmail.com>2017-09-28 13:23:31 +0800
committerDavid S. Miller <davem@davemloft.net>2017-10-01 03:46:42 +0100
commitd51711c0557d6dbd26c63144aef32c7b3ec264b9 (patch)
treeabae57c4f1d5ee8b9ea5cd441aa24676585ffd24 /net/ipv4
parentfef0035c0f31322d417d1954bba5ab959bf91183 (diff)
ip_gre: ipgre_tap device should keep dst
Without keeping dst, the tunnel will not update any mtu/pmtu info, since it does not have a dst on the skb. Reproducer: client(ipgre_tap1 - eth1) <-----> (eth1 - ipgre_tap1)server After reducing eth1's mtu on client, then perforamnce became 0. This patch is to netif_keep_dst in gre_tap_init, as ipgre does. Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/ip_gre.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 0162fb955b33..8b837f6f5532 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1223,6 +1223,7 @@ static int gre_tap_init(struct net_device *dev)
{
__gre_tunnel_init(dev);
dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+ netif_keep_dst(dev);
return ip_tunnel_init(dev);
}