[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, 3 insertions, 9 deletions

diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index c75ac17..6eed991 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -70,10 +70,6 @@ struct nf_ct_frag6_queue
 	__u16			nhoffset;
 };
 
-static struct inet_frags_ctl nf_frags_ctl __read_mostly = {
-	.secret_interval = 10 * 60 * HZ,
-};
-
 static struct inet_frags nf_frags;
 static struct netns_frags nf_init_frags;
 
@@ -701,7 +697,6 @@ int nf_ct_frag6_kfree_frags(struct sk_buff *skb)
 
 int nf_ct_frag6_init(void)
 {
-	nf_frags.ctl = &nf_frags_ctl;
 	nf_frags.hashfn = nf_hashfn;
 	nf_frags.constructor = ip6_frag_init;
 	nf_frags.destructor = NULL;
@@ -709,6 +704,7 @@ int nf_ct_frag6_init(void)
 	nf_frags.qsize = sizeof(struct nf_ct_frag6_queue);
 	nf_frags.match = ip6_frag_match;
 	nf_frags.frag_expire = nf_ct_frag6_expire;
+	nf_frags.secret_interval = 10 * 60 * HZ;
 	nf_init_frags.timeout = IPV6_FRAG_TIMEOUT;
 	nf_init_frags.high_thresh = 256 * 1024;
 	nf_init_frags.low_thresh = 192 * 1024;
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 85f3fa3..8520700 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -658,7 +658,7 @@ static struct ctl_table ip6_frags_ctl_table[] = {
 	{
 		.ctl_name	= NET_IPV6_IP6FRAG_SECRET_INTERVAL,
 		.procname	= "ip6frag_secret_interval",
-		.data		= &init_net.ipv6.sysctl.frags.secret_interval,
+		.data		= &ip6_frags.secret_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec_jiffies,
@@ -719,12 +719,9 @@ static inline void ip6_frags_sysctl_unregister(struct net *net)
 
 static int ipv6_frags_init_net(struct net *net)
 {
-	ip6_frags.ctl = &net->ipv6.sysctl.frags;
-
 	net->ipv6.frags.high_thresh = 256 * 1024;
 	net->ipv6.frags.low_thresh = 192 * 1024;
 	net->ipv6.frags.timeout = IPV6_FRAG_TIMEOUT;
-	net->ipv6.sysctl.frags.secret_interval = 10 * 60 * HZ;
 
 	inet_frags_init_net(&net->ipv6.frags);
 
@@ -748,6 +745,7 @@ int __init ipv6_frag_init(void)
 	ip6_frags.qsize = sizeof(struct frag_queue);
 	ip6_frags.match = ip6_frag_match;
 	ip6_frags.frag_expire = ip6_frag_expire;
+	ip6_frags.secret_interval = 10 * 60 * HZ;
 	inet_frags_init(&ip6_frags);
 out:
 	return ret;