cls_api: add flow_indr_block_call function

This patch make indr_block_call don't access struct tc_indr_block_cb
and tc_indr_block_dev directly
Signed-off-by: wenxu <wenxu@ucloud.cn>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/cls_api.c

@@ -773,13 +773,27 @@ void tc_indr_block_cb_unregister(struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(tc_indr_block_cb_unregister);
 
+static void flow_indr_block_call(struct net_device *dev,
+				 struct flow_block_offload *bo,
+				 enum flow_block_command command)
+{
+	struct tc_indr_block_cb *indr_block_cb;
+	struct tc_indr_block_dev *indr_dev;
+
+	indr_dev = tc_indr_block_dev_lookup(dev);
+	if (!indr_dev)
+		return;
+
+	list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
+		indr_block_cb->cb(dev, indr_block_cb->cb_priv, TC_SETUP_BLOCK,
+				  bo);
+}
+
 static void tc_indr_block_call(struct tcf_block *block, struct net_device *dev,
 			       struct tcf_block_ext_info *ei,
 			       enum flow_block_command command,
 			       struct netlink_ext_ack *extack)
 {
-	struct tc_indr_block_cb *indr_block_cb;
-	struct tc_indr_block_dev *indr_dev;
 	struct flow_block_offload bo = {
 		.command	= command,
 		.binder_type	= ei->binder_type,
@@ -790,14 +804,7 @@ static void tc_indr_block_call(struct tcf_block *block, struct net_device *dev,
 	};
 	INIT_LIST_HEAD(&bo.cb_list);
 
-	indr_dev = tc_indr_block_dev_lookup(dev);
-	if (!indr_dev)
-		return;
-
-	list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
-		indr_block_cb->cb(dev, indr_block_cb->cb_priv, TC_SETUP_BLOCK,
-				  &bo);
-
+	flow_indr_block_call(dev, &bo, command);
 	tcf_block_setup(block, &bo);
 }