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Date: Tue, 17 Apr 2012 10:56:16 +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 05/12] netfilter: udp proto sysctl support for net namespace
add and export four functions nf_conntrack_proto_ipv[4,6]_udp_[init,fini]
for the nf_conntrack_ipv[4,6] modules.
modify the udp_timeouts to net->ct.proto.sysctl_udp_timeouts
---
net/netfilter/nf_conntrack_proto_udp.c | 160 +++++++++++++++++++++++++++-----
1 files changed, 138 insertions(+), 22 deletions(-)
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index a9073dc..8e2935a 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -19,18 +19,13 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/nf_conntrack_udp.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_log.h>
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
-enum udp_conntrack {
- UDP_CT_UNREPLIED,
- UDP_CT_REPLIED,
- UDP_CT_MAX
-};
-
static unsigned int udp_timeouts[UDP_CT_MAX] = {
[UDP_CT_UNREPLIED] = 30*HZ,
[UDP_CT_REPLIED] = 180*HZ,
@@ -73,7 +68,7 @@ static int udp_print_tuple(struct seq_file *s,
static unsigned int *udp_get_timeouts(struct net *net)
{
- return udp_timeouts;
+ return net->ct.proto.sysctl_udp_timeouts;
}
/* Returns verdict for packet, and may modify conntracktype */
@@ -199,8 +194,6 @@ udp_timeout_nla_policy[CTA_TIMEOUT_UDP_MAX+1] = {
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
#ifdef CONFIG_SYSCTL
-static unsigned int udp_sysctl_table_users;
-static struct ctl_table_header *udp_sysctl_header;
static struct ctl_table udp_sysctl_table[] = {
{
.procname = "nf_conntrack_udp_timeout",
@@ -266,14 +259,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
.nla_policy = udp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-#ifdef CONFIG_SYSCTL
- .ctl_table_users = &udp_sysctl_table_users,
- .ctl_table_header = &udp_sysctl_header,
- .ctl_table = udp_sysctl_table,
-#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- .ctl_compat_table = udp_compat_sysctl_table,
-#endif
-#endif
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4);
@@ -304,10 +289,141 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
.nla_policy = udp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-#ifdef CONFIG_SYSCTL
- .ctl_table_users = &udp_sysctl_table_users,
- .ctl_table_header = &udp_sysctl_header,
- .ctl_table = udp_sysctl_table,
-#endif
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);
+
+static int nf_conntrack_proto_udp_net_init(struct net *net)
+{
+ struct ctl_table *table;
+ int i, ret = 0;
+
+#ifdef CONFIG_SYSCTL
+ if (!net->ct.proto.udp_sysctl_header) {
+ net->ct.proto.udp_table_users = 0;
+ for (i = 0; i < UDP_CT_MAX; i++)
+ net->ct.proto.sysctl_udp_timeouts[i] = udp_timeouts[i];
+ table = kmemdup(udp_sysctl_table,
+ sizeof(udp_sysctl_table),
+ GFP_KERNEL);
+ if (!table)
+ return -ENOMEM;
+ table[0].data = &net->ct.proto.
+ sysctl_udp_timeouts[UDP_CT_UNREPLIED];
+ table[1].data = &net->ct.proto.
+ sysctl_udp_timeouts[UDP_CT_REPLIED];
+ } else
+ table = net->ct.proto.udp_sysctl_header->ctl_table_arg;
+
+ ret = nf_ct_register_net_sysctl(net,
+ &net->ct.proto.udp_sysctl_header,
+ nf_net_netfilter_sysctl_path,
+ table,
+ &net->ct.proto.udp_table_users);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "nf_conntrack_proto_udp:"
+ " can't register to sysctl.\n");
+ goto out_register;
+ }
+ return 0;
+out_register:
+ if (!net->ct.proto.udp_sysctl_header)
+ kfree(table);
+#else
+ for (i = 0; i < UDP_CT_MAX; i++)
+ net->ct.proto.sysctl_udp_timeouts[i] = udp_timeouts[i];
+#endif
+ return ret;
+}
+
+static void nf_conntrack_proto_udp_net_fini(struct net *net)
+{
+#ifdef CONFIG_SYSCTL
+ struct ctl_table *table;
+ table = net->ct.proto.udp_sysctl_header->ctl_table_arg;
+
+ nf_ct_unregister_net_sysctl(&net->ct.proto.udp_sysctl_header,
+ table,
+ &net->ct.proto.udp_table_users);
+#endif
+}
+
+static int nf_conntrack_proto_udp_compat_init(struct net *net)
+{
+ int ret = 0;
+#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
+ struct ctl_table *compat_table;
+ compat_table = kmemdup(udp_compat_sysctl_table,
+ sizeof(udp_compat_sysctl_table),
+ GFP_KERNEL);
+ if (!compat_table)
+ return -ENOMEM;
+ compat_table[0].data = &net->ct.proto.
+ sysctl_udp_timeouts[UDP_CT_UNREPLIED];
+ compat_table[1].data = &net->ct.proto.
+ sysctl_udp_timeouts[UDP_CT_REPLIED];
+
+ ret = nf_ct_register_net_sysctl(net,
+ &net->ct.proto.udp_compat_header,
+ nf_net_ipv4_netfilter_sysctl_path,
+ compat_table,
+ NULL);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "nf_conntrack_proto_udp:"
+ " can't register to compat sysctl.\n");
+ goto out_register;
+ }
+ return 0;
+out_register:
+ kfree(compat_table);
+#endif
+#endif
+ return ret;
+}
+
+static void nf_conntrack_proto_udp_compat_fini(struct net *net)
+{
+#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
+ struct ctl_table *compat_table;
+ compat_table = net->ct.proto.udp_compat_header->ctl_table_arg;
+ nf_ct_unregister_net_sysctl(&net->ct.proto.udp_compat_header,
+ compat_table,
+ NULL);
+#endif
+#endif
+}
+
+int nf_conntrack_proto_ipv4_udp_init(struct net *net)
+{
+ int ret = 0;
+ ret = nf_conntrack_proto_udp_net_init(net);
+ if (ret < 0)
+ return ret;
+ ret = nf_conntrack_proto_udp_compat_init(net);
+ if (ret < 0)
+ nf_conntrack_proto_udp_net_fini(net);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_proto_ipv4_udp_init);
+
+void nf_conntrack_proto_ipv4_udp_fini(struct net *net)
+{
+ nf_conntrack_proto_udp_compat_fini(net);
+ nf_conntrack_proto_udp_net_fini(net);
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_proto_ipv4_udp_fini);
+
+int nf_conntrack_proto_ipv6_udp_init(struct net *net)
+{
+ return nf_conntrack_proto_udp_net_init(net);
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_proto_ipv6_udp_init);
+
+void nf_conntrack_proto_ipv6_udp_fini(struct net *net)
+{
+ return nf_conntrack_proto_udp_net_fini(net);
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_proto_ipv6_udp_fini);
--
1.7.7.6
--
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