[NETNS]: Add namespace parameter to ip_cmsg_send.

Pass the init_net there for now.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip.h

@@ -362,7 +362,8 @@ extern int ip_options_rcv_srr(struct sk_buff *skb);
  */
 
 extern void	ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb);
-extern int	ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc);
+extern int	ip_cmsg_send(struct net *net,
+			     struct msghdr *msg, struct ipcm_cookie *ipc);
 extern int	ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen);
 extern int	ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen);
 extern int	compat_ip_setsockopt(struct sock *sk, int level,

net/ipv4/ip_sockglue.c

@@ -163,7 +163,7 @@ void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
 		ip_cmsg_recv_security(msg, skb);
 }
 
-int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc)
+int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc)
 {
 	int err;
 	struct cmsghdr *cmsg;
@@ -176,7 +176,7 @@ int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc)
 		switch (cmsg->cmsg_type) {
 		case IP_RETOPTS:
 			err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
-			err = ip_options_get(&init_net, &ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40);
+			err = ip_options_get(net, &ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40);
 			if (err)
 				return err;
 			break;

net/ipv4/raw.c

@@ -499,7 +499,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	ipc.oif = sk->sk_bound_dev_if;
 
 	if (msg->msg_controllen) {
-		err = ip_cmsg_send(msg, &ipc);
+		err = ip_cmsg_send(&init_net, msg, &ipc);
 		if (err)
 			goto out;
 		if (ipc.opt)

net/ipv4/udp.c

@@ -607,7 +607,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 
 	ipc.oif = sk->sk_bound_dev_if;
 	if (msg->msg_controllen) {
-		err = ip_cmsg_send(msg, &ipc);
+		err = ip_cmsg_send(&init_net, msg, &ipc);
 		if (err)
 			return err;
 		if (ipc.opt)