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path: root/drivers/net/tun.c
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Diffstat (limited to 'drivers/net/tun.c')
-rw-r--r--drivers/net/tun.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 259b2b84b2b3..db736b944016 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2828,7 +2828,10 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
rcu_assign_pointer(tfile->tun, tun);
}
- netif_carrier_on(tun->dev);
+ if (ifr->ifr_flags & IFF_NO_CARRIER)
+ netif_carrier_off(tun->dev);
+ else
+ netif_carrier_on(tun->dev);
/* Make sure persistent devices do not get stuck in
* xoff state.
@@ -3056,8 +3059,8 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
* This is needed because we never checked for invalid flags on
* TUNSETIFF.
*/
- return put_user(IFF_TUN | IFF_TAP | TUN_FEATURES,
- (unsigned int __user*)argp);
+ return put_user(IFF_TUN | IFF_TAP | IFF_NO_CARRIER |
+ TUN_FEATURES, (unsigned int __user*)argp);
} else if (cmd == TUNSETQUEUE) {
return tun_set_queue(file, &ifr);
} else if (cmd == SIOCGSKNS) {