netfilter: conntrack: rename nf_ct_iterate_cleanup

There are several places where we needlesly call nf_ct_iterate_cleanup,
we should instead iterate the full table at module unload time.

This is a leftover from back when the conntrack table got duplicated
per net namespace.

So rename nf_ct_iterate_cleanup to nf_ct_iterate_cleanup_net.
A later patch will then add a non-net variant.

Signed-off-by: Florian Westphal <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>

include/net/netfilter/nf_conntrack.h

@@ -225,9 +225,9 @@ extern s32 (*nf_ct_nat_offset)(const struct nf_conn *ct,
 			       u32 seq);
 
 /* Iterate over all conntracks: if iter returns true, it's deleted. */
-void nf_ct_iterate_cleanup(struct net *net,
-			   int (*iter)(struct nf_conn *i, void *data),
-			   void *data, u32 portid, int report);
+void nf_ct_iterate_cleanup_net(struct net *net,
+			       int (*iter)(struct nf_conn *i, void *data),
+			       void *data, u32 portid, int report);
 
 struct nf_conntrack_zone;
 

net/ipv4/netfilter/nf_nat_masquerade_ipv4.c

@@ -98,8 +98,8 @@ static int masq_device_event(struct notifier_block *this,
 		 */
 		NF_CT_ASSERT(dev->ifindex != 0);
 
-		nf_ct_iterate_cleanup(net, device_cmp,
-				      (void *)(long)dev->ifindex, 0, 0);
+		nf_ct_iterate_cleanup_net(net, device_cmp,
+					  (void *)(long)dev->ifindex, 0, 0);
 	}
 
 	return NOTIFY_DONE;

net/ipv6/netfilter/nf_nat_masquerade_ipv6.c

@@ -75,8 +75,8 @@ static int masq_device_event(struct notifier_block *this,
 	struct net *net = dev_net(dev);
 
 	if (event == NETDEV_DOWN)
-		nf_ct_iterate_cleanup(net, device_cmp,
-				      (void *)(long)dev->ifindex, 0, 0);
+		nf_ct_iterate_cleanup_net(net, device_cmp,
+					  (void *)(long)dev->ifindex, 0, 0);
 
 	return NOTIFY_DONE;
 }
@@ -99,7 +99,7 @@ static void iterate_cleanup_work(struct work_struct *work)
 	w = container_of(work, struct masq_dev_work, work);
 
 	index = w->ifindex;
-	nf_ct_iterate_cleanup(w->net, device_cmp, (void *)index, 0, 0);
+	nf_ct_iterate_cleanup_net(w->net, device_cmp, (void *)index, 0, 0);
 
 	put_net(w->net);
 	kfree(w);
@@ -110,12 +110,12 @@ static void iterate_cleanup_work(struct work_struct *work)
 /* ipv6 inet notifier is an atomic notifier, i.e. we cannot
  * schedule.
  *
- * Unfortunately, nf_ct_iterate_cleanup can run for a long
+ * Unfortunately, nf_ct_iterate_cleanup_net can run for a long
  * time if there are lots of conntracks and the system
  * handles high softirq load, so it frequently calls cond_resched
  * while iterating the conntrack table.
  *
- * So we defer nf_ct_iterate_cleanup walk to the system workqueue.
+ * So we defer nf_ct_iterate_cleanup_net walk to the system workqueue.
  *
  * As we can have 'a lot' of inet_events (depending on amount
  * of ipv6 addresses being deleted), we also need to add an upper

net/netfilter/nf_conntrack_core.c

@@ -1634,9 +1634,9 @@ get_next_corpse(struct net *net, int (*iter)(struct nf_conn *i, void *data),
 	return ct;
 }
 
-void nf_ct_iterate_cleanup(struct net *net,
-			   int (*iter)(struct nf_conn *i, void *data),
-			   void *data, u32 portid, int report)
+void nf_ct_iterate_cleanup_net(struct net *net,
+			       int (*iter)(struct nf_conn *i, void *data),
+			       void *data, u32 portid, int report)
 {
 	struct nf_conn *ct;
 	unsigned int bucket = 0;
@@ -1654,7 +1654,7 @@ void nf_ct_iterate_cleanup(struct net *net,
 		cond_resched();
 	}
 }
-EXPORT_SYMBOL_GPL(nf_ct_iterate_cleanup);
+EXPORT_SYMBOL_GPL(nf_ct_iterate_cleanup_net);
 
 static int kill_all(struct nf_conn *i, void *data)
 {
@@ -1723,7 +1723,7 @@ void nf_conntrack_cleanup_net_list(struct list_head *net_exit_list)
 i_see_dead_people:
 	busy = 0;
 	list_for_each_entry(net, net_exit_list, exit_list) {
-		nf_ct_iterate_cleanup(net, kill_all, NULL, 0, 0);
+		nf_ct_iterate_cleanup_net(net, kill_all, NULL, 0, 0);
 		if (atomic_read(&net->ct.count) != 0)
 			busy = 1;
 	}

net/netfilter/nf_conntrack_netlink.c

@@ -1117,8 +1117,8 @@ static int ctnetlink_flush_conntrack(struct net *net,
 			return PTR_ERR(filter);
 	}
 
-	nf_ct_iterate_cleanup(net, ctnetlink_filter_match, filter,
-			      portid, report);
+	nf_ct_iterate_cleanup_net(net, ctnetlink_filter_match, filter,
+				  portid, report);
 	kfree(filter);
 
 	return 0;

net/netfilter/nf_conntrack_proto.c

@@ -282,7 +282,7 @@ void nf_ct_l3proto_pernet_unregister(struct net *net,
 		proto->net_ns_put(net);
 
 	/* Remove all contrack entries for this protocol */
-	nf_ct_iterate_cleanup(net, kill_l3proto, proto, 0, 0);
+	nf_ct_iterate_cleanup_net(net, kill_l3proto, proto, 0, 0);
 }
 EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_unregister);
 
@@ -450,7 +450,7 @@ void nf_ct_l4proto_pernet_unregister_one(struct net *net,
 	nf_ct_l4proto_unregister_sysctl(net, pn, l4proto);
 
 	/* Remove all contrack entries for this protocol */
-	nf_ct_iterate_cleanup(net, kill_l4proto, l4proto, 0, 0);
+	nf_ct_iterate_cleanup_net(net, kill_l4proto, l4proto, 0, 0);
 }
 EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_unregister_one);
 

net/netfilter/nf_nat_core.c

@@ -586,7 +586,7 @@ static void nf_nat_l4proto_clean(u8 l3proto, u8 l4proto)
 
 	rtnl_lock();
 	for_each_net(net)
-		nf_ct_iterate_cleanup(net, nf_nat_proto_remove, &clean, 0, 0);
+		nf_ct_iterate_cleanup_net(net, nf_nat_proto_remove, &clean, 0, 0);
 	rtnl_unlock();
 }
 
@@ -600,7 +600,7 @@ static void nf_nat_l3proto_clean(u8 l3proto)
 	rtnl_lock();
 
 	for_each_net(net)
-		nf_ct_iterate_cleanup(net, nf_nat_proto_remove, &clean, 0, 0);
+		nf_ct_iterate_cleanup_net(net, nf_nat_proto_remove, &clean, 0, 0);
 	rtnl_unlock();
 }
 
@@ -826,7 +826,7 @@ static void __net_exit nf_nat_net_exit(struct net *net)
 {
 	struct nf_nat_proto_clean clean = {};
 
-	nf_ct_iterate_cleanup(net, nf_nat_proto_clean, &clean, 0, 0);
+	nf_ct_iterate_cleanup_net(net, nf_nat_proto_clean, &clean, 0, 0);
 }
 
 static struct pernet_operations nf_nat_net_ops = {