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* [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister
@ 2019-09-11  4:53 wenxu
  2019-09-11  4:53 ` [PATCH nf-next v6 1/4] netfilter: nf_tables_offload: add __nft_offload_get_chain function wenxu
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: wenxu @ 2019-09-11  4:53 UTC (permalink / raw)
  To: pablo; +Cc: netfilter-devel

From: wenxu <wenxu@ucloud.cn>

This series clean the offload things for both chain and rules when the
related device unregister

this version modify the 2/4 and 3/4 and only refactor the
nft_flow_offload_chain/rule function with no add other functions

wenxu (4):
  netfilter: nf_tables_offload: add __nft_offload_get_chain function
  netfilter: nf_offload: refactor the nft_flow_offload_chain function
  netfilter: nf_offload: refactor the nft_flow_offload_rule function
  netfilter: nf_offload: clean offload things when the device unregister

 include/net/netfilter/nf_tables_offload.h |   2 +-
 net/netfilter/nf_tables_api.c             |   9 +-
 net/netfilter/nf_tables_offload.c         | 135 ++++++++++++++++++++++--------
 3 files changed, 110 insertions(+), 36 deletions(-)

-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH nf-next v6 1/4] netfilter: nf_tables_offload: add __nft_offload_get_chain function
  2019-09-11  4:53 [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister wenxu
@ 2019-09-11  4:53 ` wenxu
  2019-09-11  4:53 ` [PATCH nf-next v6 2/4] netfilter: nf_offload: refactor the nft_flow_offload_chain function wenxu
                   ` (3 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: wenxu @ 2019-09-11  4:53 UTC (permalink / raw)
  To: pablo; +Cc: netfilter-devel

From: wenxu <wenxu@ucloud.cn>

Add __nft_offload_get_chain function. It make code more common
and can be used for others. __nft_offload_get_chain fix check
the offload flags.

The flow_block_ing_cmd() needs to call blocking functions while iterating
block_ing_cb_list, nft_indr_block_cb is in the cb_list. Also fix
nft_indr_block_cb in incorrect rcu case.

Signed-off-by: wenxu <wenxu@ucloud.cn>
---
v6: no change

 net/netfilter/nf_tables_offload.c | 52 +++++++++++++++++++++++++--------------
 1 file changed, 34 insertions(+), 18 deletions(-)

diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 239cb78..e200491 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -369,33 +369,49 @@ int nft_flow_rule_offload_commit(struct net *net)
 	return err;
 }
 
-static void nft_indr_block_cb(struct net_device *dev,
-			      flow_indr_block_bind_cb_t *cb, void *cb_priv,
-			      enum flow_block_command command)
+static struct nft_chain *__nft_offload_get_chain(struct net_device *dev)
 {
+	struct nft_base_chain *basechain;
 	struct net *net = dev_net(dev);
 	const struct nft_table *table;
-	const struct nft_chain *chain;
+	struct nft_chain *chain;
 
-	list_for_each_entry_rcu(table, &net->nft.tables, list) {
+	list_for_each_entry(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;
-				}
-			}
+		list_for_each_entry(chain, &table->chains, list) {
+			if (!nft_is_base_chain(chain) ||
+			    !(chain->flags & NFT_CHAIN_HW_OFFLOAD))
+				continue;
+
+			basechain = nft_base_chain(chain);
+			if (strncmp(basechain->dev_name, dev->name, IFNAMSIZ))
+				continue;
+
+			return chain;
 		}
 	}
+
+	return NULL;
+}
+
+static void nft_indr_block_cb(struct net_device *dev,
+			      flow_indr_block_bind_cb_t *cb, void *cb_priv,
+			      enum flow_block_command cmd)
+{
+	struct net *net = dev_net(dev);
+	struct nft_chain *chain;
+
+	mutex_lock(&net->nft.commit_mutex);
+	chain = __nft_offload_get_chain(dev);
+	if (chain) {
+		struct nft_base_chain *basechain;
+
+		basechain = nft_base_chain(chain);
+		nft_indr_block_ing_cmd(dev, basechain, cb, cb_priv, cmd);
+	}
+	mutex_unlock(&net->nft.commit_mutex);
 }
 
 static struct flow_indr_block_ing_entry block_ing_entry = {
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH nf-next v6 2/4] netfilter: nf_offload: refactor the nft_flow_offload_chain function
  2019-09-11  4:53 [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister wenxu
  2019-09-11  4:53 ` [PATCH nf-next v6 1/4] netfilter: nf_tables_offload: add __nft_offload_get_chain function wenxu
@ 2019-09-11  4:53 ` wenxu
  2019-09-11  4:53 ` [PATCH nf-next v6 3/4] netfilter: nf_offload: refactor the nft_flow_offload_rule function wenxu
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: wenxu @ 2019-09-11  4:53 UTC (permalink / raw)
  To: pablo; +Cc: netfilter-devel

From: wenxu <wenxu@ucloud.cn>

Refactor nft_flow_offload_chain and make it more common

Signed-off-by: wenxu <wenxu@ucloud.cn>
---
v6: only refactor nft_flow_offload_chain 

 net/netfilter/nf_tables_offload.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index e200491..367a7fa 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -294,12 +294,13 @@ static int nft_indr_block_offload_cmd(struct nft_base_chain *chain,
 
 #define FLOW_SETUP_BLOCK TC_SETUP_BLOCK
 
-static int nft_flow_offload_chain(struct nft_trans *trans,
+static int nft_flow_offload_chain(struct nft_chain *chain,
+				  u8 *ppolicy,
 				  enum flow_block_command cmd)
 {
-	struct nft_chain *chain = trans->ctx.chain;
 	struct nft_base_chain *basechain;
 	struct net_device *dev;
+	u8 policy;
 
 	if (!nft_is_base_chain(chain))
 		return -EOPNOTSUPP;
@@ -309,10 +310,10 @@ static int nft_flow_offload_chain(struct nft_trans *trans,
 	if (!dev)
 		return -EOPNOTSUPP;
 
+	policy = ppolicy ? *ppolicy : basechain->policy;
+
 	/* Only default policy to accept is supported for now. */
-	if (cmd == FLOW_BLOCK_BIND &&
-	    nft_trans_chain_policy(trans) != -1 &&
-	    nft_trans_chain_policy(trans) != NF_ACCEPT)
+	if (cmd == FLOW_BLOCK_BIND && policy != -1 && policy != NF_ACCEPT)
 		return -EOPNOTSUPP;
 
 	if (dev->netdev_ops->ndo_setup_tc)
@@ -325,6 +326,7 @@ int nft_flow_rule_offload_commit(struct net *net)
 {
 	struct nft_trans *trans;
 	int err = 0;
+	u8 policy;
 
 	list_for_each_entry(trans, &net->nft.commit_list, list) {
 		if (trans->ctx.family != NFPROTO_NETDEV)
@@ -335,13 +337,17 @@ int nft_flow_rule_offload_commit(struct net *net)
 			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
 				continue;
 
-			err = nft_flow_offload_chain(trans, FLOW_BLOCK_BIND);
+			policy = nft_trans_chain_policy(trans);
+			err = nft_flow_offload_chain(trans->ctx.chain, &policy,
+						     FLOW_BLOCK_BIND);
 			break;
 		case NFT_MSG_DELCHAIN:
 			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
 				continue;
 
-			err = nft_flow_offload_chain(trans, FLOW_BLOCK_UNBIND);
+			policy = nft_trans_chain_policy(trans);
+			err = nft_flow_offload_chain(trans->ctx.chain, &policy,
+						     FLOW_BLOCK_BIND);
 			break;
 		case NFT_MSG_NEWRULE:
 			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH nf-next v6 3/4] netfilter: nf_offload: refactor the nft_flow_offload_rule function
  2019-09-11  4:53 [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister wenxu
  2019-09-11  4:53 ` [PATCH nf-next v6 1/4] netfilter: nf_tables_offload: add __nft_offload_get_chain function wenxu
  2019-09-11  4:53 ` [PATCH nf-next v6 2/4] netfilter: nf_offload: refactor the nft_flow_offload_chain function wenxu
@ 2019-09-11  4:53 ` wenxu
  2019-09-11  4:53 ` [PATCH nf-next v6 4/4] netfilter: nf_offload: clean offload things when the device unregister wenxu
  2019-09-13 10:58 ` [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: " Pablo Neira Ayuso
  4 siblings, 0 replies; 6+ messages in thread
From: wenxu @ 2019-09-11  4:53 UTC (permalink / raw)
  To: pablo; +Cc: netfilter-devel

From: wenxu <wenxu@ucloud.cn>

Refactor nft_flow_offload_rule and make it more common

Signed-off-by: wenxu <wenxu@ucloud.cn>
---
v6: only refactor nft_flow_offload_rule

 net/netfilter/nf_tables_offload.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 367a7fa..739a79c 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -155,20 +155,20 @@ int nft_chain_offload_priority(struct nft_base_chain *basechain)
 	return 0;
 }
 
-static int nft_flow_offload_rule(struct nft_trans *trans,
+static int nft_flow_offload_rule(struct nft_chain *chain,
+				 struct nft_rule *rule,
+				 struct nft_flow_rule *flow,
 				 enum flow_cls_command command)
 {
-	struct nft_flow_rule *flow = nft_trans_flow_rule(trans);
-	struct nft_rule *rule = nft_trans_rule(trans);
 	struct flow_cls_offload cls_flow = {};
 	struct nft_base_chain *basechain;
 	struct netlink_ext_ack extack;
 	__be16 proto = ETH_P_ALL;
 
-	if (!nft_is_base_chain(trans->ctx.chain))
+	if (!nft_is_base_chain(chain))
 		return -EOPNOTSUPP;
 
-	basechain = nft_base_chain(trans->ctx.chain);
+	basechain = nft_base_chain(chain);
 
 	if (flow)
 		proto = flow->proto;
@@ -357,14 +357,20 @@ int nft_flow_rule_offload_commit(struct net *net)
 			    !(trans->ctx.flags & NLM_F_APPEND))
 				return -EOPNOTSUPP;
 
-			err = nft_flow_offload_rule(trans, FLOW_CLS_REPLACE);
+			err = nft_flow_offload_rule(trans->ctx.chain,
+						    nft_trans_rule(trans),
+						    nft_trans_flow_rule(trans),
+						    FLOW_CLS_REPLACE);
 			nft_flow_rule_destroy(nft_trans_flow_rule(trans));
 			break;
 		case NFT_MSG_DELRULE:
 			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
 				continue;
 
-			err = nft_flow_offload_rule(trans, FLOW_CLS_DESTROY);
+			err = nft_flow_offload_rule(trans->ctx.chain,
+						    nft_trans_rule(trans),
+						    nft_trans_flow_rule(trans),
+						    FLOW_CLS_DESTROY);
 			break;
 		}
 
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH nf-next v6 4/4] netfilter: nf_offload: clean offload things when the device unregister
  2019-09-11  4:53 [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister wenxu
                   ` (2 preceding siblings ...)
  2019-09-11  4:53 ` [PATCH nf-next v6 3/4] netfilter: nf_offload: refactor the nft_flow_offload_rule function wenxu
@ 2019-09-11  4:53 ` wenxu
  2019-09-13 10:58 ` [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: " Pablo Neira Ayuso
  4 siblings, 0 replies; 6+ messages in thread
From: wenxu @ 2019-09-11  4:53 UTC (permalink / raw)
  To: pablo; +Cc: netfilter-devel

From: wenxu <wenxu@ucloud.cn>

When the net_device unregister, the netdevice_notifier will release
the related netdev basedchain and rules in this chains. So it is also
need to clean the offload things before the chain is destroy.

Signed-off-by: wenxu <wenxu@ucloud.cn>
---
v6: use the new nft_flow_offload_chain api

 include/net/netfilter/nf_tables_offload.h |  2 +-
 net/netfilter/nf_tables_api.c             |  9 +++++--
 net/netfilter/nf_tables_offload.c         | 43 ++++++++++++++++++++++++++++++-
 3 files changed, 50 insertions(+), 4 deletions(-)

diff --git a/include/net/netfilter/nf_tables_offload.h b/include/net/netfilter/nf_tables_offload.h
index ddd048b..03cf585 100644
--- a/include/net/netfilter/nf_tables_offload.h
+++ b/include/net/netfilter/nf_tables_offload.h
@@ -77,7 +77,7 @@ struct nft_flow_rule {
 
 int nft_chain_offload_priority(struct nft_base_chain *basechain);
 
-void nft_offload_init(void);
+int nft_offload_init(void);
 void nft_offload_exit(void);
 
 #endif
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index c6f59ef..fef3051 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -7694,15 +7694,20 @@ static int __init nf_tables_module_init(void)
 	if (err < 0)
 		goto err4;
 
+	err = nft_offload_init();
+	if (err < 0)
+		goto err5;
+
 	/* must be last */
 	err = nfnetlink_subsys_register(&nf_tables_subsys);
 	if (err < 0)
-		goto err5;
+		goto err6;
 
 	nft_chain_route_init();
-	nft_offload_init();
 
 	return err;
+err6:
+	nft_offload_exit();
 err5:
 	rhltable_destroy(&nft_objname_ht);
 err4:
diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 739a79c..21bb772 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -426,17 +426,58 @@ static void nft_indr_block_cb(struct net_device *dev,
 	mutex_unlock(&net->nft.commit_mutex);
 }
 
+static void nft_offload_chain_clean(struct nft_chain *chain)
+{
+	struct nft_rule *rule;
+
+	list_for_each_entry(rule, &chain->rules, list) {
+		nft_flow_offload_rule(chain, rule,
+				      NULL, FLOW_CLS_DESTROY);
+	}
+
+	nft_flow_offload_chain(chain, NULL, FLOW_BLOCK_UNBIND);
+}
+
+static int nft_offload_netdev_event(struct notifier_block *this,
+				    unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+	struct net *net = dev_net(dev);
+	struct nft_chain *chain;
+
+	mutex_lock(&net->nft.commit_mutex);
+	chain = __nft_offload_get_chain(dev);
+	if (chain)
+		nft_offload_chain_clean(chain);
+	mutex_unlock(&net->nft.commit_mutex);
+
+	return NOTIFY_DONE;
+}
+
 static struct flow_indr_block_ing_entry block_ing_entry = {
 	.cb	= nft_indr_block_cb,
 	.list	= LIST_HEAD_INIT(block_ing_entry.list),
 };
 
-void nft_offload_init(void)
+static struct notifier_block nft_offload_netdev_notifier = {
+	.notifier_call	= nft_offload_netdev_event,
+};
+
+int nft_offload_init(void)
 {
+	int err;
+
+	err = register_netdevice_notifier(&nft_offload_netdev_notifier);
+	if (err < 0)
+		return err;
+
 	flow_indr_add_block_ing_cb(&block_ing_entry);
+
+	return 0;
 }
 
 void nft_offload_exit(void)
 {
 	flow_indr_del_block_ing_cb(&block_ing_entry);
+	unregister_netdevice_notifier(&nft_offload_netdev_notifier);
 }
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister
  2019-09-11  4:53 [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister wenxu
                   ` (3 preceding siblings ...)
  2019-09-11  4:53 ` [PATCH nf-next v6 4/4] netfilter: nf_offload: clean offload things when the device unregister wenxu
@ 2019-09-13 10:58 ` " Pablo Neira Ayuso
  4 siblings, 0 replies; 6+ messages in thread
From: Pablo Neira Ayuso @ 2019-09-13 10:58 UTC (permalink / raw)
  To: wenxu; +Cc: netfilter-devel

On Wed, Sep 11, 2019 at 12:53:20PM +0800, wenxu@ucloud.cn wrote:
> From: wenxu <wenxu@ucloud.cn>
> 
> This series clean the offload things for both chain and rules when the
> related device unregister
> 
> this version modify the 2/4 and 3/4 and only refactor the
> nft_flow_offload_chain/rule function with no add other functions

Series applied, I had to make a few edits on your patch descriptions.

^ permalink raw reply	[flat|nested] 6+ messages in thread

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Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-11  4:53 [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: clean offload things when the device unregister wenxu
2019-09-11  4:53 ` [PATCH nf-next v6 1/4] netfilter: nf_tables_offload: add __nft_offload_get_chain function wenxu
2019-09-11  4:53 ` [PATCH nf-next v6 2/4] netfilter: nf_offload: refactor the nft_flow_offload_chain function wenxu
2019-09-11  4:53 ` [PATCH nf-next v6 3/4] netfilter: nf_offload: refactor the nft_flow_offload_rule function wenxu
2019-09-11  4:53 ` [PATCH nf-next v6 4/4] netfilter: nf_offload: clean offload things when the device unregister wenxu
2019-09-13 10:58 ` [PATCH nf-next v6 0/4] netfilter: nf_tables_offload: " Pablo Neira Ayuso

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