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Date: Tue, 17 Apr 2012 10:56:13 +0800
From: Gao feng <gaofeng@...fujitsu.com>
To: pablo@...filter.org
Cc: netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
ebiederm@...ssion.com, serge.hallyn@...onical.com,
dlezcano@...ibm.com, Gao feng <gaofeng@...fujitsu.com>
Subject: [PATCH 02/12] netfilter: don't register sysctl when register proto
delete nf_ct_l[3,4]proto_register_sysctl when register l[3,4]proto.
and add nf_ct_register_net_sysctl,nf_ct_unregister_net_sysctl to
register the sysctl for net namespace.
Signed-off-by: Gao feng <gaofeng@...fujitsu.com>
---
net/netfilter/nf_conntrack_proto.c | 109 +++++-------------------------------
1 files changed, 15 insertions(+), 94 deletions(-)
diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
index be3da2c..207cdd8 100644
--- a/net/netfilter/nf_conntrack_proto.c
+++ b/net/netfilter/nf_conntrack_proto.c
@@ -35,12 +35,15 @@ EXPORT_SYMBOL_GPL(nf_ct_l3protos);
static DEFINE_MUTEX(nf_ct_proto_mutex);
#ifdef CONFIG_SYSCTL
-static int
-nf_ct_register_sysctl(struct ctl_table_header **header, struct ctl_path *path,
- struct ctl_table *table, unsigned int *users)
+int
+nf_ct_register_net_sysctl(struct net *net,
+ struct ctl_table_header **header,
+ struct ctl_path *path,
+ struct ctl_table *table,
+ unsigned int *users)
{
if (*header == NULL) {
- *header = register_sysctl_paths(path, table);
+ *header = register_net_sysctl_table(net, path, table);
if (*header == NULL)
return -ENOMEM;
}
@@ -48,17 +51,21 @@ nf_ct_register_sysctl(struct ctl_table_header **header, struct ctl_path *path,
(*users)++;
return 0;
}
+EXPORT_SYMBOL_GPL(nf_ct_register_net_sysctl);
-static void
-nf_ct_unregister_sysctl(struct ctl_table_header **header,
- struct ctl_table *table, unsigned int *users)
+void
+nf_ct_unregister_net_sysctl(struct ctl_table_header **header,
+ struct ctl_table *table,
+ unsigned int *users)
{
if (users != NULL && --*users > 0)
return;
unregister_sysctl_table(*header);
+ kfree(table);
*header = NULL;
}
+EXPORT_SYMBOL_GPL(nf_ct_unregister_net_sysctl);
#endif
struct nf_conntrack_l4proto *
@@ -161,29 +168,6 @@ static int kill_l4proto(struct nf_conn *i, void *data)
nf_ct_l3num(i) == l4proto->l3proto;
}
-static int nf_ct_l3proto_register_sysctl(struct nf_conntrack_l3proto *l3proto)
-{
- int err = 0;
-
-#ifdef CONFIG_SYSCTL
- if (l3proto->ctl_table != NULL) {
- err = nf_ct_register_sysctl(&l3proto->ctl_table_header,
- l3proto->ctl_table_path,
- l3proto->ctl_table, NULL);
- }
-#endif
- return err;
-}
-
-static void nf_ct_l3proto_unregister_sysctl(struct nf_conntrack_l3proto *l3proto)
-{
-#ifdef CONFIG_SYSCTL
- if (l3proto->ctl_table_header != NULL)
- nf_ct_unregister_sysctl(&l3proto->ctl_table_header,
- l3proto->ctl_table, NULL);
-#endif
-}
-
int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto)
{
int ret = 0;
@@ -203,10 +187,6 @@ int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto)
goto out_unlock;
}
- ret = nf_ct_l3proto_register_sysctl(proto);
- if (ret < 0)
- goto out_unlock;
-
if (proto->nlattr_tuple_size)
proto->nla_size = 3 * proto->nlattr_tuple_size();
@@ -230,7 +210,6 @@ void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
) != proto);
rcu_assign_pointer(nf_ct_l3protos[proto->l3proto],
&nf_conntrack_l3proto_generic);
- nf_ct_l3proto_unregister_sysctl(proto);
mutex_unlock(&nf_ct_proto_mutex);
synchronize_rcu();
@@ -243,52 +222,6 @@ void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister);
-static int nf_ct_l4proto_register_sysctl(struct nf_conntrack_l4proto *l4proto)
-{
- int err = 0;
-
-#ifdef CONFIG_SYSCTL
- if (l4proto->ctl_table != NULL) {
- err = nf_ct_register_sysctl(l4proto->ctl_table_header,
- nf_net_netfilter_sysctl_path,
- l4proto->ctl_table,
- l4proto->ctl_table_users);
- if (err < 0)
- goto out;
- }
-#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- if (l4proto->ctl_compat_table != NULL) {
- err = nf_ct_register_sysctl(&l4proto->ctl_compat_table_header,
- nf_net_ipv4_netfilter_sysctl_path,
- l4proto->ctl_compat_table, NULL);
- if (err == 0)
- goto out;
- nf_ct_unregister_sysctl(l4proto->ctl_table_header,
- l4proto->ctl_table,
- l4proto->ctl_table_users);
- }
-#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
-out:
-#endif /* CONFIG_SYSCTL */
- return err;
-}
-
-static void nf_ct_l4proto_unregister_sysctl(struct nf_conntrack_l4proto *l4proto)
-{
-#ifdef CONFIG_SYSCTL
- if (l4proto->ctl_table_header != NULL &&
- *l4proto->ctl_table_header != NULL)
- nf_ct_unregister_sysctl(l4proto->ctl_table_header,
- l4proto->ctl_table,
- l4proto->ctl_table_users);
-#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- if (l4proto->ctl_compat_table_header != NULL)
- nf_ct_unregister_sysctl(&l4proto->ctl_compat_table_header,
- l4proto->ctl_compat_table, NULL);
-#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
-#endif /* CONFIG_SYSCTL */
-}
-
/* FIXME: Allow NULL functions and sub in pointers to generic for
them. --RR */
int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *l4proto)
@@ -333,10 +266,6 @@ int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *l4proto)
goto out_unlock;
}
- ret = nf_ct_l4proto_register_sysctl(l4proto);
- if (ret < 0)
- goto out_unlock;
-
l4proto->nla_size = 0;
if (l4proto->nlattr_size)
l4proto->nla_size += l4proto->nlattr_size();
@@ -365,7 +294,6 @@ void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *l4proto)
) != l4proto);
rcu_assign_pointer(nf_ct_protos[l4proto->l3proto][l4proto->l4proto],
&nf_conntrack_l4proto_generic);
- nf_ct_l4proto_unregister_sysctl(l4proto);
mutex_unlock(&nf_ct_proto_mutex);
synchronize_rcu();
@@ -380,12 +308,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister);
int nf_conntrack_proto_init(void)
{
- unsigned int i;
- int err;
-
- err = nf_ct_l4proto_register_sysctl(&nf_conntrack_l4proto_generic);
- if (err < 0)
- return err;
+ unsigned int i;
for (i = 0; i < AF_MAX; i++)
rcu_assign_pointer(nf_ct_l3protos[i],
@@ -397,8 +320,6 @@ void nf_conntrack_proto_fini(void)
{
unsigned int i;
- nf_ct_l4proto_unregister_sysctl(&nf_conntrack_l4proto_generic);
-
/* free l3proto protocol tables */
for (i = 0; i < PF_MAX; i++)
kfree(nf_ct_protos[i]);
--
1.7.7.6
--
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