Commit 99081049 authored Feb 08, 2006 by Kristian Slavov Committed by David S. Miller Feb 08, 2006

[IPV6]: Address autoconfiguration does not work after device down/up cycle



If you set network interface down and up again, the IPv6 address
autoconfiguration does not work. 'ip addr' shows that the link-local
address is in tentative state. We don't even react to periodical router
advertisements.

During NETDEV_DOWN we clear IF_READY, and we don't set it back in
NETDEV_UP. While starting to perform DAD on the link-local address, we
notice that the device is not in IF_READY, and we abort autoconfiguration
process (which would eventually send router solicitations).

Acked-by: Juha-Matti Tapio <jmtapio@verkkotelakka.net>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 4b88f093

net/ipv6/addrconf.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2165,6 +2165,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
		dev->name);
		break;
		}

		if (idev)
		idev->if_flags \|= IF_READY;
		} else {
		if (!netif_carrier_ok(dev)) {
		/* device is still not ready. */