Merge branch 'flow_offload-add-indr-block-in-nf_table_offload'

wenxu says:

====================
flow_offload: add indr-block in nf_table_offload

This series patch make nftables offload support the vlan and
tunnel device offload through indr-block architecture.

The first four patches mv tc indr block to flow offload and
rename to flow-indr-block.
Because the new flow-indr-block can't get the tcf_block
directly. The fifth patch provide a callback list to get
flow_block of each subsystem immediately when the device
register and contain a block.
The last patch make nf_tables_offload support flow-indr-block.

This version add a mutex lock for add/del flow_indr_block_ing_cb
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/en_rep.c

@@ -781,9 +781,9 @@ static int mlx5e_rep_indr_register_block(struct mlx5e_rep_priv *rpriv,
 {
 	int err;
 
-	err = __tc_indr_block_cb_register(netdev, rpriv,
+	err = __flow_indr_block_cb_register(netdev, rpriv,
-					  mlx5e_rep_indr_setup_tc_cb,
+					    mlx5e_rep_indr_setup_tc_cb,
-					  rpriv);
+					    rpriv);
 	if (err) {
 		struct mlx5e_priv *priv = netdev_priv(rpriv->netdev);
 
@@ -796,8 +796,8 @@ static int mlx5e_rep_indr_register_block(struct mlx5e_rep_priv *rpriv,
 static void mlx5e_rep_indr_unregister_block(struct mlx5e_rep_priv *rpriv,
 					    struct net_device *netdev)
 {
-	__tc_indr_block_cb_unregister(netdev, mlx5e_rep_indr_setup_tc_cb,
+	__flow_indr_block_cb_unregister(netdev, mlx5e_rep_indr_setup_tc_cb,
-				      rpriv);
+					rpriv);
 }
 
 static int mlx5e_nic_rep_netdevice_event(struct notifier_block *nb,

drivers/net/ethernet/netronome/nfp/flower/offload.c

@@ -1649,16 +1649,17 @@ int nfp_flower_reg_indir_block_handler(struct nfp_app *app,
 		return NOTIFY_OK;
 
 	if (event == NETDEV_REGISTER) {
-		err = __tc_indr_block_cb_register(netdev, app,
+		err = __flow_indr_block_cb_register(netdev, app,
-						  nfp_flower_indr_setup_tc_cb,
+						    nfp_flower_indr_setup_tc_cb,
-						  app);
+						    app);
 		if (err)
 			nfp_flower_cmsg_warn(app,
 					     "Indirect block reg failed - %s\n",
 					     netdev->name);
 	} else if (event == NETDEV_UNREGISTER) {
-		__tc_indr_block_cb_unregister(netdev,
+		__flow_indr_block_cb_unregister(netdev,
-					      nfp_flower_indr_setup_tc_cb, app);
+						nfp_flower_indr_setup_tc_cb,
+						app);
 	}
 
 	return NOTIFY_OK;

include/net/flow_offload.h

@@ -4,6 +4,7 @@
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <net/flow_dissector.h>
+#include <linux/rhashtable.h>
 
 struct flow_match {
 	struct flow_dissector	*dissector;
@@ -370,4 +371,40 @@ static inline void flow_block_init(struct flow_block *flow_block)
 	INIT_LIST_HEAD(&flow_block->cb_list);
 }
 
+typedef int flow_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv,
+				      enum tc_setup_type type, void *type_data);
+
+typedef void flow_indr_block_ing_cmd_t(struct net_device *dev,
+					flow_indr_block_bind_cb_t *cb,
+					void *cb_priv,
+					enum flow_block_command command);
+
+struct flow_indr_block_ing_entry {
+	flow_indr_block_ing_cmd_t *cb;
+	struct list_head	list;
+};
+
+void flow_indr_add_block_ing_cb(struct flow_indr_block_ing_entry *entry);
+
+void flow_indr_del_block_ing_cb(struct flow_indr_block_ing_entry *entry);
+
+int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
+				  flow_indr_block_bind_cb_t *cb,
+				  void *cb_ident);
+
+void __flow_indr_block_cb_unregister(struct net_device *dev,
+				     flow_indr_block_bind_cb_t *cb,
+				     void *cb_ident);
+
+int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
+				flow_indr_block_bind_cb_t *cb, void *cb_ident);
+
+void flow_indr_block_cb_unregister(struct net_device *dev,
+				   flow_indr_block_bind_cb_t *cb,
+				   void *cb_ident);
+
+void flow_indr_block_call(struct net_device *dev,
+			  struct flow_block_offload *bo,
+			  enum flow_block_command command);
+
 #endif /* _NET_FLOW_OFFLOAD_H */

include/net/netfilter/nf_tables_offload.h

@@ -63,6 +63,10 @@ struct nft_rule;
 struct nft_flow_rule *nft_flow_rule_create(const struct nft_rule *rule);
 void nft_flow_rule_destroy(struct nft_flow_rule *flow);
 int nft_flow_rule_offload_commit(struct net *net);
+void nft_indr_block_get_and_ing_cmd(struct net_device *dev,
+				    flow_indr_block_bind_cb_t *cb,
+				    void *cb_priv,
+				    enum flow_block_command command);
 
 #define NFT_OFFLOAD_MATCH(__key, __base, __field, __len, __reg)		\
 	(__reg)->base_offset	=					\

include/net/pkt_cls.h

@@ -70,15 +70,6 @@ static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
 	return block->q;
 }
 
-int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
-				tc_indr_block_bind_cb_t *cb, void *cb_ident);
-int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
-			      tc_indr_block_bind_cb_t *cb, void *cb_ident);
-void __tc_indr_block_cb_unregister(struct net_device *dev,
-				   tc_indr_block_bind_cb_t *cb, void *cb_ident);
-void tc_indr_block_cb_unregister(struct net_device *dev,
-				 tc_indr_block_bind_cb_t *cb, void *cb_ident);
-
 int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 		 struct tcf_result *res, bool compat_mode);
 
@@ -137,32 +128,6 @@ void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
 {
 }
 
-static inline
-int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
-				tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	return 0;
-}
-
-static inline
-int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
-			      tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	return 0;
-}
-
-static inline
-void __tc_indr_block_cb_unregister(struct net_device *dev,
-				   tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-}
-
-static inline
-void tc_indr_block_cb_unregister(struct net_device *dev,
-				 tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-}
-
 static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 			       struct tcf_result *res, bool compat_mode)
 {

include/net/sch_generic.h

@@ -23,9 +23,6 @@ struct tcf_walker;
 struct module;
 struct bpf_flow_keys;
 
-typedef int tc_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv,
-				    enum tc_setup_type type, void *type_data);
-
 struct qdisc_rate_table {
 	struct tc_ratespec rate;
 	u32		data[256];

net/core/flow_offload.c

@@ -2,6 +2,8 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <net/flow_offload.h>
+#include <linux/rtnetlink.h>
+#include <linux/mutex.h>
 
 struct flow_rule *flow_rule_alloc(unsigned int num_actions)
 {
@@ -280,3 +282,241 @@ int flow_block_cb_setup_simple(struct flow_block_offload *f,
 	}
 }
 EXPORT_SYMBOL(flow_block_cb_setup_simple);
+
+static LIST_HEAD(block_ing_cb_list);
+
+static struct rhashtable indr_setup_block_ht;
+
+struct flow_indr_block_cb {
+	struct list_head list;
+	void *cb_priv;
+	flow_indr_block_bind_cb_t *cb;
+	void *cb_ident;
+};
+
+struct flow_indr_block_dev {
+	struct rhash_head ht_node;
+	struct net_device *dev;
+	unsigned int refcnt;
+	struct list_head cb_list;
+};
+
+static const struct rhashtable_params flow_indr_setup_block_ht_params = {
+	.key_offset	= offsetof(struct flow_indr_block_dev, dev),
+	.head_offset	= offsetof(struct flow_indr_block_dev, ht_node),
+	.key_len	= sizeof(struct net_device *),
+};
+
+static struct flow_indr_block_dev *
+flow_indr_block_dev_lookup(struct net_device *dev)
+{
+	return rhashtable_lookup_fast(&indr_setup_block_ht, &dev,
+				      flow_indr_setup_block_ht_params);
+}
+
+static struct flow_indr_block_dev *
+flow_indr_block_dev_get(struct net_device *dev)
+{
+	struct flow_indr_block_dev *indr_dev;
+
+	indr_dev = flow_indr_block_dev_lookup(dev);
+	if (indr_dev)
+		goto inc_ref;
+
+	indr_dev = kzalloc(sizeof(*indr_dev), GFP_KERNEL);
+	if (!indr_dev)
+		return NULL;
+
+	INIT_LIST_HEAD(&indr_dev->cb_list);
+	indr_dev->dev = dev;
+	if (rhashtable_insert_fast(&indr_setup_block_ht, &indr_dev->ht_node,
+				   flow_indr_setup_block_ht_params)) {
+		kfree(indr_dev);
+		return NULL;
+	}
+
+inc_ref:
+	indr_dev->refcnt++;
+	return indr_dev;
+}
+
+static void flow_indr_block_dev_put(struct flow_indr_block_dev *indr_dev)
+{
+	if (--indr_dev->refcnt)
+		return;
+
+	rhashtable_remove_fast(&indr_setup_block_ht, &indr_dev->ht_node,
+			       flow_indr_setup_block_ht_params);
+	kfree(indr_dev);
+}
+
+static struct flow_indr_block_cb *
+flow_indr_block_cb_lookup(struct flow_indr_block_dev *indr_dev,
+			  flow_indr_block_bind_cb_t *cb, void *cb_ident)
+{
+	struct flow_indr_block_cb *indr_block_cb;
+
+	list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
+		if (indr_block_cb->cb == cb &&
+		    indr_block_cb->cb_ident == cb_ident)
+			return indr_block_cb;
+	return NULL;
+}
+
+static struct flow_indr_block_cb *
+flow_indr_block_cb_add(struct flow_indr_block_dev *indr_dev, void *cb_priv,
+		       flow_indr_block_bind_cb_t *cb, void *cb_ident)
+{
+	struct flow_indr_block_cb *indr_block_cb;
+
+	indr_block_cb = flow_indr_block_cb_lookup(indr_dev, cb, cb_ident);
+	if (indr_block_cb)
+		return ERR_PTR(-EEXIST);
+
+	indr_block_cb = kzalloc(sizeof(*indr_block_cb), GFP_KERNEL);
+	if (!indr_block_cb)
+		return ERR_PTR(-ENOMEM);
+
+	indr_block_cb->cb_priv = cb_priv;
+	indr_block_cb->cb = cb;
+	indr_block_cb->cb_ident = cb_ident;
+	list_add(&indr_block_cb->list, &indr_dev->cb_list);
+
+	return indr_block_cb;
+}
+
+static void flow_indr_block_cb_del(struct flow_indr_block_cb *indr_block_cb)
+{
+	list_del(&indr_block_cb->list);
+	kfree(indr_block_cb);
+}
+
+static void flow_block_ing_cmd(struct net_device *dev,
+			       flow_indr_block_bind_cb_t *cb,
+			       void *cb_priv,
+			       enum flow_block_command command)
+{
+	struct flow_indr_block_ing_entry *entry;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(entry, &block_ing_cb_list, list) {
+		entry->cb(dev, cb, cb_priv, command);
+	}
+	rcu_read_unlock();
+}
+
+int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
+				  flow_indr_block_bind_cb_t *cb,
+				  void *cb_ident)
+{
+	struct flow_indr_block_cb *indr_block_cb;
+	struct flow_indr_block_dev *indr_dev;
+	int err;
+
+	indr_dev = flow_indr_block_dev_get(dev);
+	if (!indr_dev)
+		return -ENOMEM;
+
+	indr_block_cb = flow_indr_block_cb_add(indr_dev, cb_priv, cb, cb_ident);
+	err = PTR_ERR_OR_ZERO(indr_block_cb);
+	if (err)
+		goto err_dev_put;
+
+	flow_block_ing_cmd(dev, indr_block_cb->cb, indr_block_cb->cb_priv,
+			   FLOW_BLOCK_BIND);
+
+	return 0;
+
+err_dev_put:
+	flow_indr_block_dev_put(indr_dev);
+	return err;
+}
+EXPORT_SYMBOL_GPL(__flow_indr_block_cb_register);
+
+int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
+				flow_indr_block_bind_cb_t *cb,
+				void *cb_ident)
+{
+	int err;
+
+	rtnl_lock();
+	err = __flow_indr_block_cb_register(dev, cb_priv, cb, cb_ident);
+	rtnl_unlock();
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(flow_indr_block_cb_register);
+
+void __flow_indr_block_cb_unregister(struct net_device *dev,
+				     flow_indr_block_bind_cb_t *cb,
+				     void *cb_ident)
+{
+	struct flow_indr_block_cb *indr_block_cb;
+	struct flow_indr_block_dev *indr_dev;
+
+	indr_dev = flow_indr_block_dev_lookup(dev);
+	if (!indr_dev)
+		return;
+
+	indr_block_cb = flow_indr_block_cb_lookup(indr_dev, cb, cb_ident);
+	if (!indr_block_cb)
+		return;
+
+	flow_block_ing_cmd(dev, indr_block_cb->cb, indr_block_cb->cb_priv,
+			   FLOW_BLOCK_UNBIND);
+
+	flow_indr_block_cb_del(indr_block_cb);
+	flow_indr_block_dev_put(indr_dev);
+}
+EXPORT_SYMBOL_GPL(__flow_indr_block_cb_unregister);
+
+void flow_indr_block_cb_unregister(struct net_device *dev,
+				   flow_indr_block_bind_cb_t *cb,
+				   void *cb_ident)
+{
+	rtnl_lock();
+	__flow_indr_block_cb_unregister(dev, cb, cb_ident);
+	rtnl_unlock();
+}
+EXPORT_SYMBOL_GPL(flow_indr_block_cb_unregister);
+
+void flow_indr_block_call(struct net_device *dev,
+			  struct flow_block_offload *bo,
+			  enum flow_block_command command)
+{
+	struct flow_indr_block_cb *indr_block_cb;
+	struct flow_indr_block_dev *indr_dev;
+
+	indr_dev = flow_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);
+}
+EXPORT_SYMBOL_GPL(flow_indr_block_call);
+
+static DEFINE_MUTEX(flow_indr_block_ing_cb_lock);
+void flow_indr_add_block_ing_cb(struct flow_indr_block_ing_entry *entry)
+{
+	mutex_lock(&flow_indr_block_ing_cb_lock);
+	list_add_tail_rcu(&entry->list, &block_ing_cb_list);
+	mutex_unlock(&flow_indr_block_ing_cb_lock);
+}
+EXPORT_SYMBOL_GPL(flow_indr_add_block_ing_cb);
+
+void flow_indr_del_block_ing_cb(struct flow_indr_block_ing_entry *entry)
+{
+	mutex_lock(&flow_indr_block_ing_cb_lock);
+	list_del_rcu(&entry->list);
+	mutex_unlock(&flow_indr_block_ing_cb_lock);
+}
+EXPORT_SYMBOL_GPL(flow_indr_del_block_ing_cb);
+
+static int __init init_flow_indr_rhashtable(void)
+{
+	return rhashtable_init(&indr_setup_block_ht,
+			       &flow_indr_setup_block_ht_params);
+}
+subsys_initcall(init_flow_indr_rhashtable);

net/netfilter/nf_tables_api.c

@@ -7593,6 +7593,11 @@ static struct pernet_operations nf_tables_net_ops = {
 	.exit	= nf_tables_exit_net,
 };
 
+static struct flow_indr_block_ing_entry block_ing_entry = {
+	.cb = nft_indr_block_get_and_ing_cmd,
+	.list = LIST_HEAD_INIT(block_ing_entry.list),
+};
+
 static int __init nf_tables_module_init(void)
 {
 	int err;
@@ -7624,6 +7629,7 @@ static int __init nf_tables_module_init(void)
 		goto err5;
 
 	nft_chain_route_init();
+	flow_indr_add_block_ing_cb(&block_ing_entry);
 	return err;
 err5:
 	rhltable_destroy(&nft_objname_ht);
@@ -7640,6 +7646,7 @@ err1:
 
 static void __exit nf_tables_module_exit(void)
 {
+	flow_indr_del_block_ing_cb(&block_ing_entry);
 	nfnetlink_subsys_unregister(&nf_tables_subsys);
 	unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
 	nft_chain_filter_fini();

net/netfilter/nf_tables_offload.c

@@ -171,24 +171,110 @@ static int nft_flow_offload_unbind(struct flow_block_offload *bo,
 	return 0;
 }
 
+static int nft_block_setup(struct nft_base_chain *basechain,
+			   struct flow_block_offload *bo,
+			   enum flow_block_command cmd)
+{
+	int err;
+
+	switch (cmd) {
+	case FLOW_BLOCK_BIND:
+		err = nft_flow_offload_bind(bo, basechain);
+		break;
+	case FLOW_BLOCK_UNBIND:
+		err = nft_flow_offload_unbind(bo, basechain);
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		err = -EOPNOTSUPP;
+	}
+
+	return err;
+}
+
+static int nft_block_offload_cmd(struct nft_base_chain *chain,
+				 struct net_device *dev,
+				 enum flow_block_command cmd)
+{
+	struct netlink_ext_ack extack = {};
+	struct flow_block_offload bo = {};
+	int err;
+
+	bo.net = dev_net(dev);
+	bo.block = &chain->flow_block;
+	bo.command = cmd;
+	bo.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
+	bo.extack = &extack;
+	INIT_LIST_HEAD(&bo.cb_list);
+
+	err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_BLOCK, &bo);
+	if (err < 0)
+		return err;
+
+	return nft_block_setup(chain, &bo, cmd);
+}
+
+static void nft_indr_block_ing_cmd(struct net_device *dev,
+				   struct nft_base_chain *chain,
+				   flow_indr_block_bind_cb_t *cb,
+				   void *cb_priv,
+				   enum flow_block_command cmd)
+{
+	struct netlink_ext_ack extack = {};
+	struct flow_block_offload bo = {};
+
+	if (!chain)
+		return;
+
+	bo.net = dev_net(dev);
+	bo.block = &chain->flow_block;
+	bo.command = cmd;
+	bo.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
+	bo.extack = &extack;
+	INIT_LIST_HEAD(&bo.cb_list);
+
+	cb(dev, cb_priv, TC_SETUP_BLOCK, &bo);
+
+	nft_block_setup(chain, &bo, cmd);
+}
+
+static int nft_indr_block_offload_cmd(struct nft_base_chain *chain,
+				      struct net_device *dev,
+				      enum flow_block_command cmd)
+{
+	struct flow_block_offload bo = {};
+	struct netlink_ext_ack extack = {};
+
+	bo.net = dev_net(dev);
+	bo.block = &chain->flow_block;
+	bo.command = cmd;
+	bo.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
+	bo.extack = &extack;
+	INIT_LIST_HEAD(&bo.cb_list);
+
+	flow_indr_block_call(dev, &bo, cmd);
+
+	if (list_empty(&bo.cb_list))
+		return -EOPNOTSUPP;
+
+	return nft_block_setup(chain, &bo, cmd);
+}
+
 #define FLOW_SETUP_BLOCK TC_SETUP_BLOCK
 
 static int nft_flow_offload_chain(struct nft_trans *trans,
 				  enum flow_block_command cmd)
 {
 	struct nft_chain *chain = trans->ctx.chain;
-	struct netlink_ext_ack extack = {};
-	struct flow_block_offload bo = {};
 	struct nft_base_chain *basechain;
 	struct net_device *dev;
-	int err;
 
 	if (!nft_is_base_chain(chain))
 		return -EOPNOTSUPP;
 
 	basechain = nft_base_chain(chain);
 	dev = basechain->ops.dev;
-	if (!dev || !dev->netdev_ops->ndo_setup_tc)
+	if (!dev)
 		return -EOPNOTSUPP;
 
 	/* Only default policy to accept is supported for now. */
@@ -197,26 +283,10 @@ static int nft_flow_offload_chain(struct nft_trans *trans,
 	    nft_trans_chain_policy(trans) != NF_ACCEPT)
 		return -EOPNOTSUPP;
 
-	bo.command = cmd;
+	if (dev->netdev_ops->ndo_setup_tc)
-	bo.block = &basechain->flow_block;
+		return nft_block_offload_cmd(basechain, dev, cmd);
-	bo.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
+	else
-	bo.extack = &extack;
+		return nft_indr_block_offload_cmd(basechain, dev, cmd);
-	INIT_LIST_HEAD(&bo.cb_list);
-
-	err = dev->netdev_ops->ndo_setup_tc(dev, FLOW_SETUP_BLOCK, &bo);
-	if (err < 0)
-		return err;
-
-	switch (cmd) {
-	case FLOW_BLOCK_BIND:
-		err = nft_flow_offload_bind(&bo, basechain);
-		break;
-	case FLOW_BLOCK_UNBIND:
-		err = nft_flow_offload_unbind(&bo, basechain);
-		break;
-	}
-
-	return err;
 }
 
 int nft_flow_rule_offload_commit(struct net *net)
@@ -266,3 +336,33 @@ int nft_flow_rule_offload_commit(struct net *net)
 
 	return err;
 }
+
+void nft_indr_block_get_and_ing_cmd(struct net_device *dev,
+				    flow_indr_block_bind_cb_t *cb,
+				    void *cb_priv,
+				    enum flow_block_command command)
+{
+	struct net *net = dev_net(dev);
+	const struct nft_table *table;
+	const struct nft_chain *chain;
+
+	list_for_each_entry_rcu(table, &net->nft.tables, list) {
+		if (table->family != NFPROTO_NETDEV)
+			continue;
+
+		list_for_each_entry_rcu(chain, &table->chains, list) {
+			if (nft_is_base_chain(chain)) {
+				struct nft_base_chain *basechain;
+
+				basechain = nft_base_chain(chain);
+				if (!strncmp(basechain->dev_name, dev->name,
+					     IFNAMSIZ)) {
+					nft_indr_block_ing_cmd(dev, basechain,
+							       cb, cb_priv,
+							       command);
+					return;
+				}
+			}
+		}
+	}
+}

net/sched/cls_api.c

@@ -37,6 +37,7 @@
 #include <net/tc_act/tc_skbedit.h>
 #include <net/tc_act/tc_ct.h>
 #include <net/tc_act/tc_mpls.h>
+#include <net/flow_offload.h>
 
 extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1];
 
@@ -545,6 +546,33 @@ static void tcf_chain_flush(struct tcf_chain *chain, bool rtnl_held)
 	}
 }
 
+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,
+				  flow_indr_block_bind_cb_t *cb,
+				  void *cb_priv,
+				  enum flow_block_command command)
+{
+	struct flow_block_offload bo = {
+		.command	= command,
+		.binder_type	= FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
+		.net		= dev_net(dev),
+		.block_shared	= tcf_block_non_null_shared(block),
+	};
+	INIT_LIST_HEAD(&bo.cb_list);
+
+	if (!block)
+		return;
+
+	bo.block = &block->flow_block;
+
+	cb(dev, cb_priv, TC_SETUP_BLOCK, &bo);
+
+	tcf_block_setup(block, &bo);
+}
+
 static struct tcf_block *tc_dev_ingress_block(struct net_device *dev)
 {
 	const struct Qdisc_class_ops *cops;
@@ -567,213 +595,22 @@ static struct tcf_block *tc_dev_ingress_block(struct net_device *dev)
 	return cops->tcf_block(qdisc, TC_H_MIN_INGRESS, NULL);
 }
 
-static struct rhashtable indr_setup_block_ht;
+static void tc_indr_block_get_and_ing_cmd(struct net_device *dev,
-
+					  flow_indr_block_bind_cb_t *cb,
-struct tc_indr_block_dev {
+					  void *cb_priv,
-	struct rhash_head ht_node;
+					  enum flow_block_command command)
-	struct net_device *dev;
-	unsigned int refcnt;
-	struct list_head cb_list;
-	struct tcf_block *block;
-};
-
-struct tc_indr_block_cb {
-	struct list_head list;
-	void *cb_priv;
-	tc_indr_block_bind_cb_t *cb;
-	void *cb_ident;
-};
-
-static const struct rhashtable_params tc_indr_setup_block_ht_params = {
-	.key_offset	= offsetof(struct tc_indr_block_dev, dev),
-	.head_offset	= offsetof(struct tc_indr_block_dev, ht_node),
-	.key_len	= sizeof(struct net_device *),
-};
-
-static struct tc_indr_block_dev *
-tc_indr_block_dev_lookup(struct net_device *dev)
 {
-	return rhashtable_lookup_fast(&indr_setup_block_ht, &dev,
+	struct tcf_block *block = tc_dev_ingress_block(dev);
-				      tc_indr_setup_block_ht_params);
+
+	tc_indr_block_ing_cmd(dev, block, cb, cb_priv, command);
 }
 
-static struct tc_indr_block_dev *tc_indr_block_dev_get(struct net_device *dev)
+static void tc_indr_block_call(struct tcf_block *block,
-{
+			       struct net_device *dev,
-	struct tc_indr_block_dev *indr_dev;
-
-	indr_dev = tc_indr_block_dev_lookup(dev);
-	if (indr_dev)
-		goto inc_ref;
-
-	indr_dev = kzalloc(sizeof(*indr_dev), GFP_KERNEL);
-	if (!indr_dev)
-		return NULL;
-
-	INIT_LIST_HEAD(&indr_dev->cb_list);
-	indr_dev->dev = dev;
-	indr_dev->block = tc_dev_ingress_block(dev);
-	if (rhashtable_insert_fast(&indr_setup_block_ht, &indr_dev->ht_node,
-				   tc_indr_setup_block_ht_params)) {
-		kfree(indr_dev);
-		return NULL;
-	}
-
-inc_ref:
-	indr_dev->refcnt++;
-	return indr_dev;
-}
-
-static void tc_indr_block_dev_put(struct tc_indr_block_dev *indr_dev)
-{
-	if (--indr_dev->refcnt)
-		return;
-
-	rhashtable_remove_fast(&indr_setup_block_ht, &indr_dev->ht_node,
-			       tc_indr_setup_block_ht_params);
-	kfree(indr_dev);
-}
-
-static struct tc_indr_block_cb *
-tc_indr_block_cb_lookup(struct tc_indr_block_dev *indr_dev,
-			tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	struct tc_indr_block_cb *indr_block_cb;
-
-	list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
-		if (indr_block_cb->cb == cb &&
-		    indr_block_cb->cb_ident == cb_ident)
-			return indr_block_cb;
-	return NULL;
-}
-
-static struct tc_indr_block_cb *
-tc_indr_block_cb_add(struct tc_indr_block_dev *indr_dev, void *cb_priv,
-		     tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	struct tc_indr_block_cb *indr_block_cb;
-
-	indr_block_cb = tc_indr_block_cb_lookup(indr_dev, cb, cb_ident);
-	if (indr_block_cb)
-		return ERR_PTR(-EEXIST);
-
-	indr_block_cb = kzalloc(sizeof(*indr_block_cb), GFP_KERNEL);
-	if (!indr_block_cb)
-		return ERR_PTR(-ENOMEM);
-
-	indr_block_cb->cb_priv = cb_priv;
-	indr_block_cb->cb = cb;
-	indr_block_cb->cb_ident = cb_ident;
-	list_add(&indr_block_cb->list, &indr_dev->cb_list);
-
-	return indr_block_cb;
-}
-
-static void tc_indr_block_cb_del(struct tc_indr_block_cb *indr_block_cb)
-{
-	list_del(&indr_block_cb->list);
-	kfree(indr_block_cb);
-}
-
-static int tcf_block_setup(struct tcf_block *block,
-			   struct flow_block_offload *bo);
-
-static void tc_indr_block_ing_cmd(struct tc_indr_block_dev *indr_dev,
-				  struct tc_indr_block_cb *indr_block_cb,
-				  enum flow_block_command command)
-{
-	struct flow_block_offload bo = {
-		.command	= command,
-		.binder_type	= FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
-		.net		= dev_net(indr_dev->dev),
-		.block_shared	= tcf_block_non_null_shared(indr_dev->block),
-	};
-	INIT_LIST_HEAD(&bo.cb_list);
-
-	if (!indr_dev->block)
-		return;
-
-	bo.block = &indr_dev->block->flow_block;
-
-	indr_block_cb->cb(indr_dev->dev, indr_block_cb->cb_priv, TC_SETUP_BLOCK,
-			  &bo);
-	tcf_block_setup(indr_dev->block, &bo);
-}
-
-int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
-				tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	struct tc_indr_block_cb *indr_block_cb;
-	struct tc_indr_block_dev *indr_dev;
-	int err;
-
-	indr_dev = tc_indr_block_dev_get(dev);
-	if (!indr_dev)
-		return -ENOMEM;
-
-	indr_block_cb = tc_indr_block_cb_add(indr_dev, cb_priv, cb, cb_ident);
-	err = PTR_ERR_OR_ZERO(indr_block_cb);
-	if (err)
-		goto err_dev_put;
-
-	tc_indr_block_ing_cmd(indr_dev, indr_block_cb, FLOW_BLOCK_BIND);
-	return 0;
-
-err_dev_put:
-	tc_indr_block_dev_put(indr_dev);
-	return err;
-}
-EXPORT_SYMBOL_GPL(__tc_indr_block_cb_register);
-
-int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
-			      tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	int err;
-
-	rtnl_lock();
-	err = __tc_indr_block_cb_register(dev, cb_priv, cb, cb_ident);
-	rtnl_unlock();
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(tc_indr_block_cb_register);
-
-void __tc_indr_block_cb_unregister(struct net_device *dev,
-				   tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	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;
-
-	indr_block_cb = tc_indr_block_cb_lookup(indr_dev, cb, cb_ident);
-	if (!indr_block_cb)
-		return;
-
-	/* Send unbind message if required to free any block cbs. */
-	tc_indr_block_ing_cmd(indr_dev, indr_block_cb, FLOW_BLOCK_UNBIND);
-	tc_indr_block_cb_del(indr_block_cb);
-	tc_indr_block_dev_put(indr_dev);
-}
-EXPORT_SYMBOL_GPL(__tc_indr_block_cb_unregister);
-
-void tc_indr_block_cb_unregister(struct net_device *dev,
-				 tc_indr_block_bind_cb_t *cb, void *cb_ident)
-{
-	rtnl_lock();
-	__tc_indr_block_cb_unregister(dev, cb, cb_ident);
-	rtnl_unlock();
-}
-EXPORT_SYMBOL_GPL(tc_indr_block_cb_unregister);
-
-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,
@@ -784,16 +621,7 @@ 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);
+	flow_indr_block_call(dev, &bo, command);
-	if (!indr_dev)
-		return;
-
-	indr_dev->block = command == FLOW_BLOCK_BIND ? 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,
-				  &bo);
-
 	tcf_block_setup(block, &bo);
 }
 
@@ -3355,6 +3183,11 @@ static struct pernet_operations tcf_net_ops = {
 	.size = sizeof(struct tcf_net),
 };
 
+static struct flow_indr_block_ing_entry block_ing_entry = {
+	.cb = tc_indr_block_get_and_ing_cmd,
+	.list = LIST_HEAD_INIT(block_ing_entry.list),
+};
+
 static int __init tc_filter_init(void)
 {
 	int err;
@@ -3367,10 +3200,7 @@ static int __init tc_filter_init(void)
 	if (err)
 		goto err_register_pernet_subsys;
 
-	err = rhashtable_init(&indr_setup_block_ht,
+	flow_indr_add_block_ing_cb(&block_ing_entry);
-			      &tc_indr_setup_block_ht_params);
-	if (err)
-		goto err_rhash_setup_block_ht;
 
 	rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_new_tfilter, NULL,
 		      RTNL_FLAG_DOIT_UNLOCKED);
@@ -3385,8 +3215,6 @@ static int __init tc_filter_init(void)
 
 	return 0;
 
-err_rhash_setup_block_ht:
-	unregister_pernet_subsys(&tcf_net_ops);
 err_register_pernet_subsys:
 	destroy_workqueue(tc_filter_wq);
 	return err;