ip6_vti: fix creating fallback tunnel device for vti6
authorHaishuang Yan <yanhaishuang@cmss.chinamobile.com>
Sun, 19 Aug 2018 07:05:05 +0000 (15:05 +0800)
committerDavid S. Miller <davem@davemloft.net>
Sun, 19 Aug 2018 18:26:39 +0000 (11:26 -0700)
commite2948e5af8eeb6c945000772b7613b0323a0a203
tree234e8c98ca4fff8799cb7bb2f23ba09126061cfb
parentcd1aa9c2c665cafbd05b83507d3f1096f3912aa4
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>
net/ipv6/ip6_vti.c