tipc: convert legacy nl node addr set to nl compat

Convert TIPC_CMD_SET_NODE_ADDR to compat doit.
Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/config.c

@@ -134,29 +134,6 @@ static struct sk_buff *tipc_show_stats(void)
 	return buf;
 }
 
-static struct sk_buff *cfg_set_own_addr(struct net *net)
-{
-	struct tipc_net *tn = net_generic(net, tipc_net_id);
-	u32 addr;
-
-	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
-		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
-
-	addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
-	if (addr == tn->own_addr)
-		return tipc_cfg_reply_none();
-	if (!tipc_addr_node_valid(addr))
-		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
-						   " (node address)");
-	if (tn->own_addr)
-		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
-						   " (cannot change node address once assigned)");
-	if (!tipc_net_start(net, addr))
-		return tipc_cfg_reply_none();
-
-	return tipc_cfg_reply_error_string("cannot change to network mode");
-}
-
 static struct sk_buff *cfg_set_netid(struct net *net)
 {
 	struct tipc_net *tn = net_generic(net, tipc_net_id);
@@ -208,9 +185,6 @@ struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd,
 	case TIPC_CMD_SHOW_STATS:
 		rep_tlv_buf = tipc_show_stats();
 		break;
-	case TIPC_CMD_SET_NODE_ADDR:
-		rep_tlv_buf = cfg_set_own_addr(net);
-		break;
 	case TIPC_CMD_SET_NETID:
 		rep_tlv_buf = cfg_set_netid(net);
 		break;

net/tipc/net.c

@@ -208,7 +208,7 @@ int tipc_nl_net_dump(struct sk_buff *skb, struct netlink_callback *cb)
 
 int tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
 {
-	struct net *net = genl_info_net(info);
+	struct net *net = sock_net(skb->sk);
 	struct tipc_net *tn = net_generic(net, tipc_net_id);
 	struct nlattr *attrs[TIPC_NLA_NET_MAX + 1];
 	int err;

net/tipc/netlink_compat.c

@@ -851,6 +851,26 @@ static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
 			    sizeof(node_info));
 }
 
+static int tipc_nl_compat_net_set(struct sk_buff *skb,
+				  struct tipc_nl_compat_msg *msg)
+{
+	u32 val;
+	struct nlattr *net;
+
+	val = ntohl(*(__be32 *)TLV_DATA(msg->req));
+
+	net = nla_nest_start(skb, TIPC_NLA_NET);
+	if (!net)
+		return -EMSGSIZE;
+
+	if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
+		return -EMSGSIZE;
+
+	nla_nest_end(skb, net);
+
+	return 0;
+}
+
 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
 {
 	struct tipc_nl_compat_cmd_dump dump;
@@ -924,6 +944,11 @@ static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
 		dump.dumpit = tipc_nl_node_dump;
 		dump.format = tipc_nl_compat_node_dump;
 		return tipc_nl_compat_dumpit(&dump, msg);
+	case TIPC_CMD_SET_NODE_ADDR:
+		msg->req_type = TIPC_TLV_NET_ADDR;
+		doit.doit = tipc_nl_net_set;
+		doit.transcode = tipc_nl_compat_net_set;
+		return tipc_nl_compat_doit(&doit, msg);
 	}
 
 	return -EOPNOTSUPP;
@@ -1033,6 +1058,7 @@ static int tipc_nl_compat_tmp_wrap(struct sk_buff *skb, struct genl_info *info)
 	case TIPC_CMD_SHOW_PORTS:
 	case TIPC_CMD_GET_MEDIA_NAMES:
 	case TIPC_CMD_GET_NODES:
+	case TIPC_CMD_SET_NODE_ADDR:
 		return tipc_nl_compat_recv(skb, info);
 	}