netdev - [PATCH net-next v5 2/6] cls_api: replace block with flow_block in tc_indr_block

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Date:   Thu,  1 Aug 2019 11:03:43 +0800
From:   wenxu@...oud.cn
To:     jiri@...nulli.us, pablo@...filter.org, fw@...len.de,
        jakub.kicinski@...ronome.com
Cc:     netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next v5 2/6] cls_api: replace block with flow_block in tc_indr_block_dev

From: wenxu <wenxu@...oud.cn>

This patch make tc_indr_block_dev can separate from tc subsystem

Signed-off-by: wenxu <wenxu@...oud.cn>
---
v5: new patch

 net/sched/cls_api.c | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 2e3b58d..f9643fa 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -574,7 +574,7 @@ struct tc_indr_block_dev {
 	struct net_device *dev;
 	unsigned int refcnt;
 	struct list_head cb_list;
-	struct tcf_block *block;
+	struct flow_block *flow_block;
 };
 
 struct tc_indr_block_cb {
@@ -597,6 +597,14 @@ struct tc_indr_block_cb {
 				      tc_indr_setup_block_ht_params);
 }
 
+static void tc_indr_get_default_block(struct tc_indr_block_dev *indr_dev)
+{
+	struct tcf_block *block = tc_dev_ingress_block(indr_dev->dev);
+
+	if (block)
+		indr_dev->flow_block = &block->flow_block;
+}
+
 static struct tc_indr_block_dev *tc_indr_block_dev_get(struct net_device *dev)
 {
 	struct tc_indr_block_dev *indr_dev;
@@ -611,7 +619,7 @@ static struct tc_indr_block_dev *tc_indr_block_dev_get(struct net_device *dev)
 
 	INIT_LIST_HEAD(&indr_dev->cb_list);
 	indr_dev->dev = dev;
-	indr_dev->block = tc_dev_ingress_block(dev);
+	tc_indr_get_default_block(indr_dev);
 	if (rhashtable_insert_fast(&indr_setup_block_ht, &indr_dev->ht_node,
 				   tc_indr_setup_block_ht_params)) {
 		kfree(indr_dev);
@@ -678,11 +686,14 @@ static int tcf_block_setup(struct tcf_block *block,
 			   struct flow_block_offload *bo);
 
 static void tc_indr_block_ing_cmd(struct net_device *dev,
-				  struct tcf_block *block,
+				  struct flow_block *flow_block,
 				  tc_indr_block_bind_cb_t *cb,
 				  void *cb_priv,
 				  enum flow_block_command command)
 {
+	struct tcf_block *block = flow_block ? container_of(flow_block,
+							    struct tcf_block,
+							    flow_block) : NULL;
 	struct flow_block_offload bo = {
 		.command	= command,
 		.binder_type	= FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
@@ -694,7 +705,7 @@ static void tc_indr_block_ing_cmd(struct net_device *dev,
 	if (!block)
 		return;
 
-	bo.block = &block->flow_block;
+	bo.block = flow_block;
 
 	cb(dev, cb_priv, TC_SETUP_BLOCK, &bo);
 
@@ -717,7 +728,7 @@ int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
 	if (err)
 		goto err_dev_put;
 
-	tc_indr_block_ing_cmd(dev, indr_dev->block, cb, cb_priv,
+	tc_indr_block_ing_cmd(dev, indr_dev->flow_block, cb, cb_priv,
 			      FLOW_BLOCK_BIND);
 	return 0;
 
@@ -750,13 +761,14 @@ void __tc_indr_block_cb_unregister(struct net_device *dev,
 	if (!indr_dev)
 		return;
 
-	indr_block_cb = tc_indr_block_cb_lookup(indr_dev, cb, cb_ident);
+	indr_block_cb = tc_indr_block_cb_lookup(indr_dev, indr_block_cb->cb,
+						indr_block_cb->cb_ident);
 	if (!indr_block_cb)
 		return;
 
 	/* Send unbind message if required to free any block cbs. */
-	tc_indr_block_ing_cmd(dev, indr_dev->block, cb, indr_block_cb->cb_priv,
-			      FLOW_BLOCK_UNBIND);
+	tc_indr_block_ing_cmd(dev, indr_dev->flow_block, indr_block_cb->cb,
+			      indr_block_cb->cb_priv, FLOW_BLOCK_UNBIND);
 	tc_indr_block_cb_del(indr_block_cb);
 	tc_indr_block_dev_put(indr_dev);
 }
@@ -792,7 +804,8 @@ static void tc_indr_block_call(struct tcf_block *block, struct net_device *dev,
 	if (!indr_dev)
 		return;
 
-	indr_dev->block = command == FLOW_BLOCK_BIND ? block : NULL;
+	indr_dev->flow_block = command == FLOW_BLOCK_BIND ?
+					  &block->flow_block : NULL;
 
 	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,
-- 
1.8.3.1