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Date:	21 May 2007 20:20:51 +0200
From:	Urs Thuermann <urs@...ogud.escape.de>
To:	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Cc:	Oliver Hartkopp <socketcan@...tkopp.net>, davem@...emloft.net,
	netdev@...r.kernel.org
Subject: Re: [FIX][PATCH] ipv6 addrconf.c REMOVED #if patch

Oliver Hartkopp <socketcan@...tkopp.net> writes:

> Yep - you were right. It looks better like this as ARPHRD_SIT is
> defined in if_arp.h in any CONFIG_* case ...

Oliver asked me to resend the patch with a sane mailer that doesn't
mangle white-space and line breaks.  So here it is.

This patch makes the netdevice notifier for IPv6 ignore all events on
non-IPv6 capable devices.

Signed-off-by: Oliver Hartkopp <socketcan@...tkopp.net>
Signed-off-by: Urs Thuermann <urs@...ogud.escape.de>

urs



--- /usr/src/linux-2.6.21/net/ipv6/addrconf.c.orig	2007-05-21 19:47:36.000000000 +0200
+++ /usr/src/linux-2.6.21/net/ipv6/addrconf.c	2007-05-21 19:54:30.000000000 +0200
@@ -2076,15 +2076,6 @@
 
 	ASSERT_RTNL();
 
-	if ((dev->type != ARPHRD_ETHER) &&
-	    (dev->type != ARPHRD_FDDI) &&
-	    (dev->type != ARPHRD_IEEE802_TR) &&
-	    (dev->type != ARPHRD_ARCNET) &&
-	    (dev->type != ARPHRD_INFINIBAND)) {
-		/* Alas, we support only Ethernet autoconfiguration. */
-		return;
-	}
-
 	idev = addrconf_add_dev(dev);
 	if (idev == NULL)
 		return;
@@ -2172,13 +2163,33 @@
 	ip6_tnl_add_linklocal(idev);
 }
 
+static int ipv6_hwtype(struct net_device *dev)
+{
+	if ((dev->type == ARPHRD_ETHER) ||
+	    (dev->type == ARPHRD_LOOPBACK) ||
+	    (dev->type == ARPHRD_SIT) ||
+	    (dev->type == ARPHRD_TUNNEL6) ||
+	    (dev->type == ARPHRD_FDDI) ||
+	    (dev->type == ARPHRD_IEEE802_TR) ||
+	    (dev->type == ARPHRD_ARCNET) ||
+	    (dev->type == ARPHRD_INFINIBAND))
+		return 1;
+
+	return 0;
+}
+
 static int addrconf_notify(struct notifier_block *this, unsigned long event,
 			   void * data)
 {
 	struct net_device *dev = (struct net_device *) data;
-	struct inet6_dev *idev = __in6_dev_get(dev);
+	struct inet6_dev *idev;
 	int run_pending = 0;
 
+	if (!ipv6_hwtype(dev))
+		return NOTIFY_OK;
+
+	idev = __in6_dev_get(dev);
+
 	switch(event) {
 	case NETDEV_REGISTER:
 		if (!idev) {
-
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