tipc: convert legacy nl net id set to nl compat

Convert TIPC_CMD_SET_NETID 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

@@ -134,26 +134,6 @@ static struct sk_buff *tipc_show_stats(void)
 	return buf;
 }
 
-static struct sk_buff *cfg_set_netid(struct net *net)
-{
-	struct tipc_net *tn = net_generic(net, tipc_net_id);
-	u32 value;
-
-	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
-		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
-	value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
-	if (value == tn->net_id)
-		return tipc_cfg_reply_none();
-	if (value < 1 || value > 9999)
-		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
-						   " (network id must be 1-9999)");
-	if (tn->own_addr)
-		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
-			" (cannot change network id once TIPC has joined a network)");
-	tn->net_id = value;
-	return tipc_cfg_reply_none();
-}
-
 struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd,
 				const void *request_area, int request_space,
 				int reply_headroom)
@@ -185,9 +165,6 @@ 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_NETID:
-		rep_tlv_buf = cfg_set_netid(net);
-		break;
 	case TIPC_CMD_GET_NETID:
 		rep_tlv_buf = tipc_cfg_reply_unsigned(tn->net_id);
 		break;

net/tipc/netlink_compat.c

@@ -38,6 +38,7 @@
 #include "name_table.h"
 #include "socket.h"
 #include "node.h"
+#include "net.h"
 #include <net/genetlink.h>
 #include <linux/tipc_config.h>
 
@@ -863,9 +864,13 @@ static int tipc_nl_compat_net_set(struct sk_buff *skb,
 	if (!net)
 		return -EMSGSIZE;
 
-	if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
-		return -EMSGSIZE;
-
+	if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
+		if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
+			return -EMSGSIZE;
+	} else if (msg->cmd == TIPC_CMD_SET_NETID) {
+		if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
+			return -EMSGSIZE;
+	}
 	nla_nest_end(skb, net);
 
 	return 0;
@@ -949,6 +954,11 @@ static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
 		doit.doit = tipc_nl_net_set;
 		doit.transcode = tipc_nl_compat_net_set;
 		return tipc_nl_compat_doit(&doit, msg);
+	case TIPC_CMD_SET_NETID:
+		msg->req_type = TIPC_TLV_UNSIGNED;
+		doit.doit = tipc_nl_net_set;
+		doit.transcode = tipc_nl_compat_net_set;
+		return tipc_nl_compat_doit(&doit, msg);
 	}
 
 	return -EOPNOTSUPP;
@@ -1059,6 +1069,7 @@ static int tipc_nl_compat_tmp_wrap(struct sk_buff *skb, struct genl_info *info)
 	case TIPC_CMD_GET_MEDIA_NAMES:
 	case TIPC_CMD_GET_NODES:
 	case TIPC_CMD_SET_NODE_ADDR:
+	case TIPC_CMD_SET_NETID:
 		return tipc_nl_compat_recv(skb, info);
 	}