Commit 273d405b authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'net-fix-a-mcast-issue-for-tipc-udp-media' 



Xin Long says:

====================
net: fix a mcast issue for tipc udp media

Patch 1 is to add a function to get the dev by source address,
which will be used by Patch 2.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 5845589e 5a6f6f57

include/net/addrconf.h

+2 −0
Original line number Diff line number Diff line
@@ -97,6 +97,8 @@ bool ipv6_chk_custom_prefix(const struct in6_addr *addr, 


int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);



struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr);



struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,

				     const struct in6_addr *addr,

				     struct net_device *dev, int strict);

net/ipv6/addrconf.c

+39 −0
Original line number Diff line number Diff line
@@ -1983,6 +1983,45 @@ int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) 
}

EXPORT_SYMBOL(ipv6_chk_prefix);



/**

 * ipv6_dev_find - find the first device with a given source address.

 * @net: the net namespace

 * @addr: the source address

 *

 * The caller should be protected by RCU, or RTNL.

 */

struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr)

{

	unsigned int hash = inet6_addr_hash(net, addr);

	struct inet6_ifaddr *ifp, *result = NULL;

	struct net_device *dev = NULL;



	rcu_read_lock();

	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {

		if (net_eq(dev_net(ifp->idev->dev), net) &&

		    ipv6_addr_equal(&ifp->addr, addr)) {

			result = ifp;

			break;

		}

	}



	if (!result) {

		struct rt6_info *rt;



		rt = rt6_lookup(net, addr, NULL, 0, NULL, 0);

		if (rt) {

			dev = rt->dst.dev;

			ip6_rt_put(rt);

		}

	} else {

		dev = result->idev->dev;

	}

	rcu_read_unlock();



	return dev;

}

EXPORT_SYMBOL(ipv6_dev_find);



struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,

				     struct net_device *dev, int strict)

{

net/tipc/udp_media.c

+8 −0
Original line number Diff line number Diff line
@@ -738,6 +738,13 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b, 
		b->mtu = b->media->mtu;

#if IS_ENABLED(CONFIG_IPV6)

	} else if (local.proto == htons(ETH_P_IPV6)) {

		struct net_device *dev;



		dev = ipv6_dev_find(net, &local.ipv6);

		if (!dev) {

			err = -ENODEV;

			goto err;

		}

		udp_conf.family = AF_INET6;

		udp_conf.use_udp6_tx_checksums = true;

		udp_conf.use_udp6_rx_checksums = true;
@@ -745,6 +752,7 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b, 
			udp_conf.local_ip6 = in6addr_any;

		else

			udp_conf.local_ip6 = local.ipv6;

		ub->ifindex = dev->ifindex;

		b->mtu = 1280;

#endif

	} else {

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