Merge branch 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

[pandora-kernel.git] / drivers / net / tun.c

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index effab0b..50b8c67 100644 (file)
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -18,6 +18,9 @@
 /*
  *  Changes:
  *
+ *  Mike Kershaw <dragorn@kismetwireless.net> 2005/08/14
+ *    Add TUNSETLINK ioctl to set the link encapsulation
+ *
  *  Mark Smith <markzzzsmith@yahoo.com.au>
  *   Use random_ether_addr() for tap MAC address.
  *
@@ -612,6 +615,18 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
                DBG(KERN_INFO "%s: owner set to %d\n", tun->dev->name, tun->owner);
                break;
 
+       case TUNSETLINK:
+               /* Only allow setting the type when the interface is down */
+               if (tun->dev->flags & IFF_UP) {
+                       DBG(KERN_INFO "%s: Linktype set failed because interface is up\n",
+                               tun->dev->name);
+                       return -EBUSY;
+               } else {
+                       tun->dev->type = (int) arg;
+                       DBG(KERN_INFO "%s: linktype set to %d\n", tun->dev->name, tun->dev->type);
+               }
+               break;
+
 #ifdef TUN_DEBUG
        case TUNSETDEBUG:
                tun->debug = arg;