devlink: move devlink_nl_put_nested_handle() into netlink.c

As the next patch is going to call this helper out of the linecard.c,
move to netlink.c.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/devlink/devl_internal.h

@@ -145,6 +145,8 @@ devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 	return 0;
 }
 
+int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net,
+				 struct devlink *devlink);
 int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info);
 
 /* Notify */

net/devlink/linecard.c

@@ -65,32 +65,6 @@ devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info)
 	return devlink_linecard_get_from_attrs(devlink, info->attrs);
 }
 
-static int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net,
-					struct devlink *devlink)
-{
-	struct nlattr *nested_attr;
-
-	nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK);
-	if (!nested_attr)
-		return -EMSGSIZE;
-	if (devlink_nl_put_handle(msg, devlink))
-		goto nla_put_failure;
-	if (!net_eq(net, devlink_net(devlink))) {
-		int id = peernet2id_alloc(net, devlink_net(devlink),
-					  GFP_KERNEL);
-
-		if (nla_put_s32(msg, DEVLINK_ATTR_NETNS_ID, id))
-			return -EMSGSIZE;
-	}
-
-	nla_nest_end(msg, nested_attr);
-	return 0;
-
-nla_put_failure:
-	nla_nest_cancel(msg, nested_attr);
-	return -EMSGSIZE;
-}
-
 struct devlink_linecard_type {
 	const char *type;
 	const void *priv;

net/devlink/netlink.c

@@ -82,6 +82,32 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
 	[DEVLINK_ATTR_REGION_DIRECT] = { .type = NLA_FLAG },
 };
 
+int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net,
+				 struct devlink *devlink)
+{
+	struct nlattr *nested_attr;
+
+	nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK);
+	if (!nested_attr)
+		return -EMSGSIZE;
+	if (devlink_nl_put_handle(msg, devlink))
+		goto nla_put_failure;
+	if (!net_eq(net, devlink_net(devlink))) {
+		int id = peernet2id_alloc(net, devlink_net(devlink),
+					  GFP_KERNEL);
+
+		if (nla_put_s32(msg, DEVLINK_ATTR_NETNS_ID, id))
+			return -EMSGSIZE;
+	}
+
+	nla_nest_end(msg, nested_attr);
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(msg, nested_attr);
+	return -EMSGSIZE;
+}
+
 int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info)
 {
 	int err;