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authorHaishuang Yan <yanhaishuang@cmss.chinamobile.com>2018-08-19 10:05:05 +0300
committerDavid S. Miller <davem@davemloft.net>2018-08-19 21:26:39 +0300
commite2948e5af8eeb6c945000772b7613b0323a0a203 (patch)
tree234e8c98ca4fff8799cb7bb2f23ba09126061cfb /net/ipv6/ip6_vti.c
parentcd1aa9c2c665cafbd05b83507d3f1096f3912aa4 (diff)
downloadlinux-e2948e5af8eeb6c945000772b7613b0323a0a203.tar.xz
ip6_vti: fix creating fallback tunnel device for vti6
When set fb_tunnels_only_for_init_net to 1, don't create fallback tunnel device for vti6 when a new namespace is created. Tested: [root@builder2 ~]# modprobe ip6_tunnel [root@builder2 ~]# modprobe ip6_vti [root@builder2 ~]# echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net [root@builder2 ~]# unshare -n [root@builder2 ~]# ip link 1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_vti.c')
-rw-r--r--net/ipv6/ip6_vti.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index 65d4a8044cb0..38dec9da90d3 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -1106,6 +1106,8 @@ static int __net_init vti6_init_net(struct net *net)
ip6n->tnls[0] = ip6n->tnls_wc;
ip6n->tnls[1] = ip6n->tnls_r_l;
+ if (!net_has_fallback_tunnels(net))
+ return 0;
err = -ENOMEM;
ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6_vti0",
NET_NAME_UNKNOWN, vti6_dev_setup);