netfilter: conntrack: merge ecache and timestamp sysctl tables with main one

Similar to previous change, this time for eache and timestamp.
Unlike helper and acct, these can be disabled at build time, so they
need ifdef guards.

Next patch will remove a few (now obsolete) functions.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

3 files changed, 35 insertions, 128 deletions

diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index c11822a7d2bf..75118b75aa50 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -336,85 +336,22 @@ EXPORT_SYMBOL_GPL(nf_ct_expect_unregister_notifier);
 #define NF_CT_EVENTS_DEFAULT 1
 static int nf_ct_events __read_mostly = NF_CT_EVENTS_DEFAULT;
 
-#ifdef CONFIG_SYSCTL
-static struct ctl_table event_sysctl_table[] = {
-	{
-		.procname	= "nf_conntrack_events",
-		.data		= &init_net.ct.sysctl_events,
-		.maxlen		= sizeof(unsigned int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
-	{}
-};
-#endif /* CONFIG_SYSCTL */
-
 static const struct nf_ct_ext_type event_extend = {
 	.len	= sizeof(struct nf_conntrack_ecache),
 	.align	= __alignof__(struct nf_conntrack_ecache),
 	.id	= NF_CT_EXT_ECACHE,
 };
 
-#ifdef CONFIG_SYSCTL
-static int nf_conntrack_event_init_sysctl(struct net *net)
-{
-	struct ctl_table *table;
-
-	table = kmemdup(event_sysctl_table, sizeof(event_sysctl_table),
-			GFP_KERNEL);
-	if (!table)
-		goto out;
-
-	table[0].data = &net->ct.sysctl_events;
-
-	/* Don't export sysctls to unprivileged users */
-	if (net->user_ns != &init_user_ns)
-		table[0].procname = NULL;
-
-	net->ct.event_sysctl_header =
-		register_net_sysctl(net, "net/netfilter", table);
-	if (!net->ct.event_sysctl_header) {
-		pr_err("can't register to sysctl\n");
-		goto out_register;
-	}
-	return 0;
-
-out_register:
-	kfree(table);
-out:
-	return -ENOMEM;
-}
-
-static void nf_conntrack_event_fini_sysctl(struct net *net)
-{
-	struct ctl_table *table;
-
-	table = net->ct.event_sysctl_header->ctl_table_arg;
-	unregister_net_sysctl_table(net->ct.event_sysctl_header);
-	kfree(table);
-}
-#else
-static int nf_conntrack_event_init_sysctl(struct net *net)
-{
-	return 0;
-}
-
-static void nf_conntrack_event_fini_sysctl(struct net *net)
-{
-}
-#endif /* CONFIG_SYSCTL */
-
 int nf_conntrack_ecache_pernet_init(struct net *net)
 {
 	net->ct.sysctl_events = nf_ct_events;
 	INIT_DELAYED_WORK(&net->ct.ecache_dwork, ecache_work);
-	return nf_conntrack_event_init_sysctl(net);
+	return 0;
 }
 
 void nf_conntrack_ecache_pernet_fini(struct net *net)
 {
 	cancel_delayed_work_sync(&net->ct.ecache_dwork);
-	nf_conntrack_event_fini_sysctl(net);
 }
 
 int nf_conntrack_ecache_init(void)
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 9e2d9d5d824d..b6177fd73304 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -541,6 +541,12 @@ enum nf_ct_sysctl_index {
 	NF_SYSCTL_CT_EXPECT_MAX,
 	NF_SYSCTL_CT_ACCT,
 	NF_SYSCTL_CT_HELPER,
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+	NF_SYSCTL_CT_EVENTS,
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
+	NF_SYSCTL_CT_TIMESTAMP,
+#endif
 };
 
 static struct ctl_table nf_ct_sysctl_table[] = {
@@ -602,6 +608,24 @@ static struct ctl_table nf_ct_sysctl_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+	[NF_SYSCTL_CT_EVENTS] = {
+		.procname	= "nf_conntrack_events",
+		.data		= &init_net.ct.sysctl_events,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
+	[NF_SYSCTL_CT_TIMESTAMP] = {
+		.procname	= "nf_conntrack_timestamp",
+		.data		= &init_net.ct.sysctl_tstamp,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+#endif
 	{ }
 };
 
@@ -628,12 +652,21 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
 	table[NF_SYSCTL_CT_COUNT].data = &net->ct.count;
 	table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
 	table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+	table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
+#endif
 
 	/* Don't export sysctls to unprivileged users */
 	if (net->user_ns != &init_user_ns) {
 		table[NF_SYSCTL_CT_MAX].procname = NULL;
 		table[NF_SYSCTL_CT_ACCT].procname = NULL;
 		table[NF_SYSCTL_CT_HELPER].procname = NULL;
+#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
+		table[NF_SYSCTL_CT_TIMESTAMP].procname = NULL;
+#endif
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+		table[NF_SYSCTL_CT_EVENTS].procname = NULL;
+#endif
 	}
 
 	if (!net_eq(&init_net, net))
diff --git a/net/netfilter/nf_conntrack_timestamp.c b/net/netfilter/nf_conntrack_timestamp.c
index 56766cb26e40..bae151d93bea 100644
--- a/net/netfilter/nf_conntrack_timestamp.c
+++ b/net/netfilter/nf_conntrack_timestamp.c
@@ -22,83 +22,20 @@ static bool nf_ct_tstamp __read_mostly;
 module_param_named(tstamp, nf_ct_tstamp, bool, 0644);
 MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping.");
 
-#ifdef CONFIG_SYSCTL
-static struct ctl_table tstamp_sysctl_table[] = {
-	{
-		.procname	= "nf_conntrack_timestamp",
-		.data		= &init_net.ct.sysctl_tstamp,
-		.maxlen		= sizeof(unsigned int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
-	{}
-};
-#endif /* CONFIG_SYSCTL */
-
 static const struct nf_ct_ext_type tstamp_extend = {
 	.len	= sizeof(struct nf_conn_tstamp),
 	.align	= __alignof__(struct nf_conn_tstamp),
 	.id	= NF_CT_EXT_TSTAMP,
 };
 
-#ifdef CONFIG_SYSCTL
-static int nf_conntrack_tstamp_init_sysctl(struct net *net)
-{
-	struct ctl_table *table;
-
-	table = kmemdup(tstamp_sysctl_table, sizeof(tstamp_sysctl_table),
-			GFP_KERNEL);
-	if (!table)
-		goto out;
-
-	table[0].data = &net->ct.sysctl_tstamp;
-
-	/* Don't export sysctls to unprivileged users */
-	if (net->user_ns != &init_user_ns)
-		table[0].procname = NULL;
-
-	net->ct.tstamp_sysctl_header = register_net_sysctl(net,	"net/netfilter",
-							   table);
-	if (!net->ct.tstamp_sysctl_header) {
-		pr_err("can't register to sysctl\n");
-		goto out_register;
-	}
-	return 0;
-
-out_register:
-	kfree(table);
-out:
-	return -ENOMEM;
-}
-
-static void nf_conntrack_tstamp_fini_sysctl(struct net *net)
-{
-	struct ctl_table *table;
-
-	table = net->ct.tstamp_sysctl_header->ctl_table_arg;
-	unregister_net_sysctl_table(net->ct.tstamp_sysctl_header);
-	kfree(table);
-}
-#else
-static int nf_conntrack_tstamp_init_sysctl(struct net *net)
-{
-	return 0;
-}
-
-static void nf_conntrack_tstamp_fini_sysctl(struct net *net)
-{
-}
-#endif
-
 int nf_conntrack_tstamp_pernet_init(struct net *net)
 {
 	net->ct.sysctl_tstamp = nf_ct_tstamp;
-	return nf_conntrack_tstamp_init_sysctl(net);
+	return 0;
 }
 
 void nf_conntrack_tstamp_pernet_fini(struct net *net)
 {
-	nf_conntrack_tstamp_fini_sysctl(net);
 }
 
 int nf_conntrack_tstamp_init(void)