Commit 81f6cb31 authored by Xin Long's avatar Xin Long Committed by David S. Miller
Browse files

ipv6: add ipv6_dev_find() 



This is to add an ip_dev_find like function for ipv6, used to find
the dev by saddr.

It will be used by TIPC protocol. So also export it.

Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Acked-by: default avatarYing Xue <ying.xue@windriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5845589e

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)

{

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