X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fnet%2Ftun.c;h=7ab94c825b577f13b606bc938b834db6003559ad;hb=c4da004857056e6ee034c4110ccdcba659077b7e;hp=d91856b19f6fdaff4322576af492d107c2c8e8aa;hpb=233607dbbc823caf685e778cabc49fb7f679900b;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index d91856b19f6..7ab94c825b5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -313,6 +313,21 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
 
 	switch (tun->flags & TUN_TYPE_MASK) {
 	case TUN_TUN_DEV:
+		if (tun->flags & TUN_NO_PI) {
+			switch (skb->data[0] & 0xf0) {
+			case 0x40:
+				pi.proto = htons(ETH_P_IP);
+				break;
+			case 0x60:
+				pi.proto = htons(ETH_P_IPV6);
+				break;
+			default:
+				tun->dev->stats.rx_dropped++;
+				kfree_skb(skb);
+				return -EINVAL;
+			}
+		}
+
 		skb_reset_mac_header(skb);
 		skb->protocol = pi.proto;
 		skb->dev = tun->dev;
@@ -668,16 +683,23 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
 		break;
 
 	case TUNSETLINK:
+	{
+		int ret;
+
 		/* Only allow setting the type when the interface is down */
+		rtnl_lock();
 		if (tun->dev->flags & IFF_UP) {
 			DBG(KERN_INFO "%s: Linktype set failed because interface is up\n",
 				tun->dev->name);
-			return -EBUSY;
+			ret = -EBUSY;
 		} else {
 			tun->dev->type = (int) arg;
 			DBG(KERN_INFO "%s: linktype set to %d\n", tun->dev->name, tun->dev->type);
+			ret = 0;
 		}
-		break;
+		rtnl_unlock();
+		return ret;
+	}
 
 #ifdef TUN_DEBUG
 	case TUNSETDEBUG:
@@ -734,7 +756,12 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
 	case SIOCADDMULTI:
 		/** Add the specified group to the character device's multicast filter
 		 * list. */
+		rtnl_lock();
+		netif_tx_lock_bh(tun->dev);
 		add_multi(tun->chr_filter, ifr.ifr_hwaddr.sa_data);
+		netif_tx_unlock_bh(tun->dev);
+		rtnl_unlock();
+
 		DBG(KERN_DEBUG "%s: add multi: %s\n",
 		    tun->dev->name, print_mac(mac, ifr.ifr_hwaddr.sa_data));
 		return 0;
@@ -742,7 +769,12 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
 	case SIOCDELMULTI:
 		/** Remove the specified group from the character device's multicast
 		 * filter list. */
+		rtnl_lock();
+		netif_tx_lock_bh(tun->dev);
 		del_multi(tun->chr_filter, ifr.ifr_hwaddr.sa_data);
+		netif_tx_unlock_bh(tun->dev);
+		rtnl_unlock();
+
 		DBG(KERN_DEBUG "%s: del multi: %s\n",
 		    tun->dev->name, print_mac(mac, ifr.ifr_hwaddr.sa_data));
 		return 0;