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Commit f47b9464 authored by Ben Hutchings's avatar Ben Hutchings Committed by David S. Miller
Browse files

ipv6: Send unsolicited neighbour advertismements when notified 



The NETDEV_NOTIFY_PEERS notifier is a request to send such
advertisements following migration to a different physical link,
e.g. virtual machine migration.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b3337e4c

net/ipv6/ndisc.c

+26 −0
Original line number Diff line number Diff line
@@ -611,6 +611,29 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, 
		     inc_opt ? ND_OPT_TARGET_LL_ADDR : 0);

}



static void ndisc_send_unsol_na(struct net_device *dev)

{

	struct inet6_dev *idev;

	struct inet6_ifaddr *ifa;

	struct in6_addr mcaddr;



	idev = in6_dev_get(dev);

	if (!idev)

		return;



	read_lock_bh(&idev->lock);

	list_for_each_entry(ifa, &idev->addr_list, if_list) {

		addrconf_addr_solict_mult(&ifa->addr, &mcaddr);

		ndisc_send_na(dev, NULL, &mcaddr, &ifa->addr,

			      /*router=*/ !!idev->cnf.forwarding,

			      /*solicited=*/ false, /*override=*/ true,

			      /*inc_opt=*/ true);

	}

	read_unlock_bh(&idev->lock);



	in6_dev_put(idev);

}



void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,

		   const struct in6_addr *solicit,

		   const struct in6_addr *daddr, const struct in6_addr *saddr)
@@ -1723,6 +1746,9 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, 
		neigh_ifdown(&nd_tbl, dev);

		fib6_run_gc(~0UL, net);

		break;

	case NETDEV_NOTIFY_PEERS:

		ndisc_send_unsol_na(dev);

		break;

	default:

		break;

	}