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Message-Id: <1334631383-12326-12-git-send-email-gaofeng@cn.fujitsu.com>
Date: Tue, 17 Apr 2012 10:56:22 +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 11/12] netfilter: udplite proto sysctl support for net
register pernet_operations nf_conntrack_net_proto_udplite_ops
when loading nf_conntrack_proto_udplite module,and unregister
it when removing.
It makes no senes to register subsys for udplite and udplite6,because
the nf_conntrack_l4proto_udplite4 and nf_conntrack_l4proto_udplite6 are
register or unregister together.
Signed-off-by: Gao feng <gaofeng@...fujitsu.com>
---
net/netfilter/nf_conntrack_proto_udplite.c | 83 +++++++++++++++++++++------
1 files changed, 64 insertions(+), 19 deletions(-)
diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
index e060639..61881bc 100644
--- a/net/netfilter/nf_conntrack_proto_udplite.c
+++ b/net/netfilter/nf_conntrack_proto_udplite.c
@@ -20,16 +20,11 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/nf_conntrack_udplite.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_log.h>
-enum udplite_conntrack {
- UDPLITE_CT_UNREPLIED,
- UDPLITE_CT_REPLIED,
- UDPLITE_CT_MAX
-};
-
static unsigned int udplite_timeouts[UDPLITE_CT_MAX] = {
[UDPLITE_CT_UNREPLIED] = 30*HZ,
[UDPLITE_CT_REPLIED] = 180*HZ,
@@ -70,7 +65,7 @@ static int udplite_print_tuple(struct seq_file *s,
static unsigned int *udplite_get_timeouts(struct net *net)
{
- return udplite_timeouts;
+ return net->ct.proto.sysctl_udplite_timeouts;
}
/* Returns verdict for packet, and may modify conntracktype */
@@ -203,19 +198,19 @@ udplite_timeout_nla_policy[CTA_TIMEOUT_UDPLITE_MAX+1] = {
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
#ifdef CONFIG_SYSCTL
-static unsigned int udplite_sysctl_table_users;
-static struct ctl_table_header *udplite_sysctl_header;
static struct ctl_table udplite_sysctl_table[] = {
{
.procname = "nf_conntrack_udplite_timeout",
- .data = &udplite_timeouts[UDPLITE_CT_UNREPLIED],
+ .data = &init_net.ct.proto.
+ sysctl_udplite_timeouts[UDPLITE_CT_UNREPLIED],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_udplite_timeout_stream",
- .data = &udplite_timeouts[UDPLITE_CT_REPLIED],
+ .data = &init_net.ct.proto.
+ sysctl_udplite_timeouts[UDPLITE_CT_REPLIED],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
@@ -252,11 +247,6 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
.nla_policy = udplite_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-#ifdef CONFIG_SYSCTL
- .ctl_table_users = &udplite_sysctl_table_users,
- .ctl_table_header = &udplite_sysctl_header,
- .ctl_table = udplite_sysctl_table,
-#endif
};
static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
@@ -287,11 +277,60 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
.nla_policy = udplite_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
+};
+
+static int nf_conntrack_proto_udplite_net_init(struct net *net)
+{
+ struct ctl_table *table;
+ int i, ret = 0;
+ for (i = 0; i < UDPLITE_CT_MAX; i++)
+ net->ct.proto.sysctl_udplite_timeouts[i] = udplite_timeouts[i];
+
+#ifdef CONFIG_SYSCTL
+ table = kmemdup(udplite_sysctl_table,
+ sizeof(udplite_sysctl_table),
+ GFP_KERNEL);
+ if (!table)
+ return -ENOMEM;
+
+ table[0].data = &net->ct.proto.
+ sysctl_udplite_timeouts[UDPLITE_CT_UNREPLIED];
+ table[1].data = &net->ct.proto.
+ sysctl_udplite_timeouts[UDPLITE_CT_REPLIED];
+
+ ret = nf_ct_register_net_sysctl(net,
+ &net->ct.proto.udplite_sysctl_header,
+ nf_net_netfilter_sysctl_path,
+ table,
+ NULL);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "nf_conntrack_proto_udplite:"
+ " can't register to sysctl.\n");
+ goto out_register;
+ }
+ return 0;
+out_register:
+ kfree(table);
+#endif
+ return ret;
+}
+
+static void nf_conntrack_proto_udplite_net_fini(struct net *net)
+{
#ifdef CONFIG_SYSCTL
- .ctl_table_users = &udplite_sysctl_table_users,
- .ctl_table_header = &udplite_sysctl_header,
- .ctl_table = udplite_sysctl_table,
+ struct ctl_table *table;
+ table = net->ct.proto.udplite_sysctl_header->ctl_table_arg;
+
+ nf_ct_unregister_net_sysctl(&net->ct.proto.udplite_sysctl_header,
+ table,
+ NULL);
#endif
+}
+
+static struct pernet_operations nf_conntrack_net_proto_udplite_ops = {
+ .init = nf_conntrack_proto_udplite_net_init,
+ .exit = nf_conntrack_proto_udplite_net_fini,
};
static int __init nf_conntrack_proto_udplite_init(void)
@@ -304,7 +343,12 @@ static int __init nf_conntrack_proto_udplite_init(void)
err = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udplite6);
if (err < 0)
goto err2;
+ err = register_pernet_subsys(&nf_conntrack_net_proto_udplite_ops);
+ if (err < 0)
+ goto err3;
return 0;
+err3:
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
err2:
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
err1:
@@ -313,6 +357,7 @@ err1:
static void __exit nf_conntrack_proto_udplite_exit(void)
{
+ unregister_pernet_subsys(&nf_conntrack_net_proto_udplite_ops);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
}
--
1.7.7.6
--
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