tipc: convert legacy nl net id get to nl compat

Convert TIPC_CMD_GET_NETID to compat dumpit.

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

@@ -72,25 +72,6 @@ int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
 	return 1;
 }
 
-static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
-{
-	struct sk_buff *buf;
-	__be32 value_net;
-
-	buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
-	if (buf) {
-		value_net = htonl(value);
-		tipc_cfg_append_tlv(buf, tlv_type, &value_net,
-				    sizeof(value_net));
-	}
-	return buf;
-}
-
-static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
-{
-	return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
-}
-
 struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
 {
 	struct sk_buff *buf;
@@ -139,7 +120,6 @@ struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd,
 				int reply_headroom)
 {
 	struct sk_buff *rep_tlv_buf;
-	struct tipc_net *tn = net_generic(net, tipc_net_id);
 
 	rtnl_lock();
 
@@ -165,9 +145,6 @@ 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_GET_NETID:
-		rep_tlv_buf = tipc_cfg_reply_unsigned(tn->net_id);
-		break;
 	case TIPC_CMD_NOT_NET_ADMIN:
 		rep_tlv_buf =
 			tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);

net/tipc/netlink_compat.c

@@ -876,6 +876,18 @@ static int tipc_nl_compat_net_set(struct sk_buff *skb,
 	return 0;
 }
 
+static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
+				   struct nlattr **attrs)
+{
+	__be32 id;
+	struct nlattr *net[TIPC_NLA_NET_MAX + 1];
+
+	nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], NULL);
+	id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
+
+	return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
+}
+
 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
 {
 	struct tipc_nl_compat_cmd_dump dump;
@@ -959,6 +971,11 @@ 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_GET_NETID:
+		msg->rep_size = sizeof(u32);
+		dump.dumpit = tipc_nl_net_dump;
+		dump.format = tipc_nl_compat_net_dump;
+		return tipc_nl_compat_dumpit(&dump, msg);
 	}
 
 	return -EOPNOTSUPP;
@@ -1070,6 +1087,7 @@ static int tipc_nl_compat_tmp_wrap(struct sk_buff *skb, struct genl_info *info)
 	case TIPC_CMD_GET_NODES:
 	case TIPC_CMD_SET_NODE_ADDR:
 	case TIPC_CMD_SET_NETID:
+	case TIPC_CMD_GET_NETID:
 		return tipc_nl_compat_recv(skb, info);
 	}