vlan: partially enable SIOCSHWTSTAMP in container

Setting timestamp filter was explicitly disabled on vlan devices in
containers because it might affect other processes on the host. But it's
absolutely legit in case when real device is in the same namespace.

Fixes: 873017af7784 ("vlan: disable SIOCSHWTSTAMP in container")
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 296d0145932f47f8bc6d0a8bf94e0fa0678e330d..5920544e93e82c6e04ccd5bee9d2117c2306466e 100644 (file)
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -365,7 +365,7 @@ static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 
        switch (cmd) {
        case SIOCSHWTSTAMP:
-               if (!net_eq(dev_net(dev), &init_net))
+               if (!net_eq(dev_net(dev), dev_net(real_dev)))
                        break;
                fallthrough;
        case SIOCGMIIPHY: