[NETNS][FRAGS]: Isolate the secret interval from namespaces.

Since we have one hashtable to lookup the fragment, having
different secret_interval-s for hash rebuild doesn't make
sense, so move this one to inet_frags.

The inet_frags_ctl becomes empty after this, so remove it.
The appropriate ctl table is kept read-only in namespaces.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 4 insertions, 8 deletions

diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 5ab399c..fcf52521 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -47,7 +47,7 @@ static void inet_frag_secret_rebuild(unsigned long dummy)
 	}
 	write_unlock(&f->lock);
 
-	mod_timer(&f->secret_timer, now + f->ctl->secret_interval);
+	mod_timer(&f->secret_timer, now + f->secret_interval);
 }
 
 void inet_frags_init(struct inet_frags *f)
@@ -65,7 +65,7 @@ void inet_frags_init(struct inet_frags *f)
 
 	setup_timer(&f->secret_timer, inet_frag_secret_rebuild,
 			(unsigned long)f);
-	f->secret_timer.expires = jiffies + f->ctl->secret_interval;
+	f->secret_timer.expires = jiffies + f->secret_interval;
 	add_timer(&f->secret_timer);
 }
 EXPORT_SYMBOL(inet_frags_init);
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 80c2c19..00646ed 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -74,10 +74,6 @@ struct ipq {
 	struct inet_peer *peer;
 };
 
-static struct inet_frags_ctl ip4_frags_ctl __read_mostly = {
-	.secret_interval = 10 * 60 * HZ,
-};
-
 static struct inet_frags ip4_frags;
 
 int ip_frag_nqueues(struct net *net)
@@ -627,7 +623,7 @@ static struct ctl_table ip4_frags_ctl_table[] = {
 	{
 		.ctl_name	= NET_IPV4_IPFRAG_SECRET_INTERVAL,
 		.procname	= "ipfrag_secret_interval",
-		.data		= &ip4_frags_ctl.secret_interval,
+		.data		= &ip4_frags.secret_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec_jiffies,
@@ -720,7 +716,6 @@ static int ipv4_frags_init_net(struct net *net)
 void __init ipfrag_init(void)
 {
 	ipv4_frags_init_net(&init_net);
-	ip4_frags.ctl = &ip4_frags_ctl;
 	ip4_frags.hashfn = ip4_hashfn;
 	ip4_frags.constructor = ip4_frag_init;
 	ip4_frags.destructor = ip4_frag_free;
@@ -728,6 +723,7 @@ void __init ipfrag_init(void)
 	ip4_frags.qsize = sizeof(struct ipq);
 	ip4_frags.match = ip4_frag_match;
 	ip4_frags.frag_expire = ip_expire;
+	ip4_frags.secret_interval = 10 * 60 * HZ;
 	inet_frags_init(&ip4_frags);
 }