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

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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>
This commit is contained in:
Kristian Slavov 2006-02-08 16:10:53 -08:00 committed by David S. Miller
parent 4b88f09364
commit 9908104935
1 changed files with 3 additions and 0 deletions
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3
net/ipv6/addrconf.c
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@ -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. */