[NETNS]: Process interface address manipulation routines in the namespace.

The namespace is available when required except rtm_to_ifaddr. Add
namespace argument to it.
Signed-off-by: NDenis V. Lunev <den@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/devinet.c

@@ -485,7 +485,7 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg
 	return err;
 }
 
-static struct in_ifaddr *rtm_to_ifaddr(struct nlmsghdr *nlh)
+static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh)
 {
 	struct nlattr *tb[IFA_MAX+1];
 	struct in_ifaddr *ifa;
@@ -503,7 +503,7 @@ static struct in_ifaddr *rtm_to_ifaddr(struct nlmsghdr *nlh)
 	if (ifm->ifa_prefixlen > 32 || tb[IFA_LOCAL] == NULL)
 		goto errout;
 
-	dev = __dev_get_by_index(&init_net, ifm->ifa_index);
+	dev = __dev_get_by_index(net, ifm->ifa_index);
 	err = -ENODEV;
 	if (dev == NULL)
 		goto errout;
@@ -563,7 +563,7 @@ static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg
 	if (net != &init_net)
 		return -EINVAL;
 
-	ifa = rtm_to_ifaddr(nlh);
+	ifa = rtm_to_ifaddr(net, nlh);
 	if (IS_ERR(ifa))
 		return PTR_ERR(ifa);
 
@@ -1177,7 +1177,7 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 
 	s_ip_idx = ip_idx = cb->args[1];
 	idx = 0;
-	for_each_netdev(&init_net, dev) {
+	for_each_netdev(net, dev) {
 		if (idx < s_idx)
 			goto cont;
 		if (idx > s_idx)
@@ -1211,7 +1211,9 @@ static void rtmsg_ifa(int event, struct in_ifaddr* ifa, struct nlmsghdr *nlh,
 	struct sk_buff *skb;
 	u32 seq = nlh ? nlh->nlmsg_seq : 0;
 	int err = -ENOBUFS;
+	struct net *net;
 
+	net = ifa->ifa_dev->dev->nd_net;
 	skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL);
 	if (skb == NULL)
 		goto errout;
@@ -1223,10 +1225,10 @@ static void rtmsg_ifa(int event, struct in_ifaddr* ifa, struct nlmsghdr *nlh,
 		kfree_skb(skb);
 		goto errout;
 	}
-	err = rtnl_notify(skb, &init_net, pid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL);
+	err = rtnl_notify(skb, net, pid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL);
 errout:
 	if (err < 0)
-		rtnl_set_sk_err(&init_net, RTNLGRP_IPV4_IFADDR, err);
+		rtnl_set_sk_err(net, RTNLGRP_IPV4_IFADDR, err);
 }
 
 #ifdef CONFIG_SYSCTL