diff options
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 3732e51b5ad8..27c6d235cbda 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -2664,7 +2664,7 @@ static ssize_t tun_flags_show(struct device *dev, struct device_attribute *attr, char *buf) { struct tun_struct *tun = netdev_priv(to_net_dev(dev)); - return sprintf(buf, "0x%x\n", tun_flags(tun)); + return sysfs_emit(buf, "0x%x\n", tun_flags(tun)); } static ssize_t owner_show(struct device *dev, struct device_attribute *attr, @@ -2672,9 +2672,9 @@ static ssize_t owner_show(struct device *dev, struct device_attribute *attr, { struct tun_struct *tun = netdev_priv(to_net_dev(dev)); return uid_valid(tun->owner)? - sprintf(buf, "%u\n", - from_kuid_munged(current_user_ns(), tun->owner)): - sprintf(buf, "-1\n"); + sysfs_emit(buf, "%u\n", + from_kuid_munged(current_user_ns(), tun->owner)) : + sysfs_emit(buf, "-1\n"); } static ssize_t group_show(struct device *dev, struct device_attribute *attr, @@ -2682,9 +2682,9 @@ static ssize_t group_show(struct device *dev, struct device_attribute *attr, { struct tun_struct *tun = netdev_priv(to_net_dev(dev)); return gid_valid(tun->group) ? - sprintf(buf, "%u\n", - from_kgid_munged(current_user_ns(), tun->group)): - sprintf(buf, "-1\n"); + sysfs_emit(buf, "%u\n", + from_kgid_munged(current_user_ns(), tun->group)) : + sysfs_emit(buf, "-1\n"); } static DEVICE_ATTR_RO(tun_flags); @@ -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) { |