Subject: [PATCH 2/4] inetpeer: Namespacify inet_peer_maxttl sysctl knob

From: Nikolay Borisov <[email-masked]>
Date: Wed, 17 Feb 2016 12:09:56 +0200

Signed-off-by: Nikolay Borisov <[email-masked]>
---
 include/net/ip.h           |  1 -
 include/net/netns/ipv4.h   |  2 ++
 net/ipv4/inetpeer.c        |  2 +-
 net/ipv4/sysctl_net_ipv4.c | 15 ++++++++-------
 4 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/include/net/ip.h b/include/net/ip.h
index cbb134b2f0e4..c33d53176d3c 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -243,7 +243,6 @@ static inline int inet_is_local_reserved_port(struct net *net, int port)
 /* From inetpeer.c */
 extern int inet_peer_threshold;
 extern int inet_peer_minttl;
-extern int inet_peer_maxttl;
 
 void ipfrag_init(void);
 
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index a69cde3ce460..b0623c4e2f0a 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -88,6 +88,8 @@ struct netns_ipv4 {
 	int sysctl_ip_dynaddr;
 	int sysctl_ip_early_demux;
 
+	int sysctl_inet_peer_maxttl;
+
 	int sysctl_fwmark_reflect;
 	int sysctl_tcp_fwmark_accept;
 #ifdef CONFIG_NET_L3_MASTER_DEV
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
index 86fa45809540..a9245ada56c2 100644
--- a/net/ipv4/inetpeer.c
+++ b/net/ipv4/inetpeer.c
@@ -82,7 +82,6 @@ EXPORT_SYMBOL_GPL(inet_peer_base_init);
 int inet_peer_threshold __read_mostly = 65536 + 128;	/* start to throw entries more
 					 * aggressively at this stage */
 int inet_peer_minttl __read_mostly = 120 * HZ;	/* TTL under high load: 120 sec */
-int inet_peer_maxttl __read_mostly = 10 * 60 * HZ;	/* usual time to live: 10 min */
 
 static void inetpeer_gc_worker(struct work_struct *work)
 {
@@ -369,6 +368,7 @@ static int inet_peer_gc(struct inet_peer_base *base,
 			struct inet_peer __rcu ***stackptr)
 {
 	struct inet_peer *p, *gchead = NULL;
+	int inet_peer_maxttl = base->net->ipv4.sysctl_inet_peer_maxttl;
 	__u32 delta, ttl;
 	int cnt = 0;
 
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 1e1fe6086dd9..2aaa049cbf9d 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -359,13 +359,6 @@ static struct ctl_table ipv4_table[] = {
 		.proc_handler	= proc_dointvec_jiffies,
 	},
 	{
-		.procname	= "inet_peer_maxttl",
-		.data		= &inet_peer_maxttl,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec_jiffies,
-	},
-	{
 		.procname	= "tcp_fack",
 		.data		= &sysctl_tcp_fack,
 		.maxlen		= sizeof(int),
@@ -737,6 +730,13 @@ static struct ctl_table ipv4_net_table[] = {
 		.proc_handler	= proc_dointvec
 	},
 	{
+		.procname	= "inet_peer_maxttl",
+		.data		= &init_net.ipv4.sysctl_inet_peer_maxttl,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
 		.procname	= "ip_early_demux",
 		.data		= &init_net.ipv4.sysctl_ip_early_demux,
 		.maxlen		= sizeof(int),
@@ -991,6 +991,7 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
 	net->ipv4.sysctl_ip_default_ttl = IPDEFTTL;
 	net->ipv4.sysctl_ip_dynaddr = 0;
 	net->ipv4.sysctl_ip_early_demux = 1;
+	net->ipv4.sysctl_inet_peer_maxttl = 10 * 60 * HZ;  /* usual time to live: 10 min */
 
 	return 0;
 
-- 
2.5.0