Commit d31c7b8f authored Nov 30, 2007 by Evgeniy Polyakov Committed by Herbert Xu Nov 30, 2007

[IPV6]: Restore IPv6 when MTU is big enough



Avaid provided test application, so bug got fixed.

IPv6 addrconf removes ipv6 inner device from netdev each time cmu
changes and new value is less than IPV6_MIN_MTU (1280 bytes).
When mtu is changed and new value is greater than IPV6_MIN_MTU,
it does not add ipv6 addresses and inner device bac.

This patch fixes that.

Tested with Avaid's application, which works ok now.

Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent d5a784b3

net/ipv6/addrconf.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -2293,6 +2293,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
		break;
		}

		if (!idev && dev->mtu >= IPV6_MIN_MTU)
		idev = ipv6_add_dev(dev);

		if (idev)
		idev->if_flags \|= IF_READY;
		} else {
		@@ -2363,6 +2366,12 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
		break;
		}

		if (!idev && dev->mtu >= IPV6_MIN_MTU) {
		idev = ipv6_add_dev(dev);
		if (idev)
		break;
		}

		/* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */

		case NETDEV_DOWN:

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