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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.c67
1 files changed, 52 insertions, 15 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 94622e5fb93..4cda69b6b28 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -865,6 +865,52 @@ static struct proto tun_proto = {
.obj_size = sizeof(struct tun_sock),
};
+static int tun_flags(struct tun_struct *tun)
+{
+ int flags = 0;
+
+ if (tun->flags & TUN_TUN_DEV)
+ flags |= IFF_TUN;
+ else
+ flags |= IFF_TAP;
+
+ if (tun->flags & TUN_NO_PI)
+ flags |= IFF_NO_PI;
+
+ if (tun->flags & TUN_ONE_QUEUE)
+ flags |= IFF_ONE_QUEUE;
+
+ if (tun->flags & TUN_VNET_HDR)
+ flags |= IFF_VNET_HDR;
+
+ return flags;
+}
+
+static ssize_t tun_show_flags(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));
+}
+
+static ssize_t tun_show_owner(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct tun_struct *tun = netdev_priv(to_net_dev(dev));
+ return sprintf(buf, "%d\n", tun->owner);
+}
+
+static ssize_t tun_show_group(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct tun_struct *tun = netdev_priv(to_net_dev(dev));
+ return sprintf(buf, "%d\n", tun->group);
+}
+
+static DEVICE_ATTR(tun_flags, 0444, tun_show_flags, NULL);
+static DEVICE_ATTR(owner, 0444, tun_show_owner, NULL);
+static DEVICE_ATTR(group, 0444, tun_show_group, NULL);
+
static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
{
struct sock *sk;
@@ -950,6 +996,11 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
if (err < 0)
goto err_free_sk;
+ if (device_create_file(&tun->dev->dev, &dev_attr_tun_flags) ||
+ device_create_file(&tun->dev->dev, &dev_attr_owner) ||
+ device_create_file(&tun->dev->dev, &dev_attr_group))
+ printk(KERN_ERR "Failed to create tun sysfs files\n");
+
sk->sk_destruct = tun_sock_destruct;
err = tun_attach(tun, file);
@@ -1002,21 +1053,7 @@ static int tun_get_iff(struct net *net, struct file *file, struct ifreq *ifr)
strcpy(ifr->ifr_name, tun->dev->name);
- ifr->ifr_flags = 0;
-
- if (ifr->ifr_flags & TUN_TUN_DEV)
- ifr->ifr_flags |= IFF_TUN;
- else
- ifr->ifr_flags |= IFF_TAP;
-
- if (tun->flags & TUN_NO_PI)
- ifr->ifr_flags |= IFF_NO_PI;
-
- if (tun->flags & TUN_ONE_QUEUE)
- ifr->ifr_flags |= IFF_ONE_QUEUE;
-
- if (tun->flags & TUN_VNET_HDR)
- ifr->ifr_flags |= IFF_VNET_HDR;
+ ifr->ifr_flags = tun_flags(tun);
tun_put(tun);
return 0;