netns: dont alloc ipv6 fib timer list

FIB timer list is a trivial size structure, avoid indirection and just
put it in existing ns.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 14 insertions, 28 deletions

diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index 5bacd838e88b..2932721180c0 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -39,7 +39,7 @@ struct netns_ipv6 {
 #endif
         struct rt6_info         *ip6_null_entry;
         struct rt6_statistics   *rt6_stats;
-        struct timer_list       *ip6_fib_timer;
+        struct timer_list       ip6_fib_timer;
         struct hlist_head       *fib_table_hash;
         struct fib6_table       *fib6_main_tbl;
         struct dst_ops          *ip6_dst_ops;
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 944095cf5e32..e0922975c410 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -661,16 +661,16 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 
 static __inline__ void fib6_start_gc(struct net *net, struct rt6_info *rt)
 {
-        if (!timer_pending(net->ipv6.ip6_fib_timer) &&
+        if (!timer_pending(&net->ipv6.ip6_fib_timer) &&
             (rt->rt6i_flags & (RTF_EXPIRES|RTF_CACHE)))
-                mod_timer(net->ipv6.ip6_fib_timer,
+                mod_timer(&net->ipv6.ip6_fib_timer,
                           jiffies + net->ipv6.sysctl.ip6_rt_gc_interval);
 }
 
 void fib6_force_start_gc(struct net *net)
 {
-        if (!timer_pending(net->ipv6.ip6_fib_timer))
-                mod_timer(net->ipv6.ip6_fib_timer,
+        if (!timer_pending(&net->ipv6.ip6_fib_timer))
+                mod_timer(&net->ipv6.ip6_fib_timer,
                           jiffies + net->ipv6.sysctl.ip6_rt_gc_interval);
 }
 
@@ -1449,7 +1449,7 @@ void fib6_run_gc(unsigned long expires, struct net *net)
         } else {
                 local_bh_disable();
                 if (!spin_trylock(&fib6_gc_lock)) {
-                        mod_timer(net->ipv6.ip6_fib_timer, jiffies + HZ);
+                        mod_timer(&net->ipv6.ip6_fib_timer, jiffies + HZ);
                         local_bh_enable();
                         return;
                 }
@@ -1462,12 +1462,10 @@ void fib6_run_gc(unsigned long expires, struct net *net)
         fib6_clean_all(net, fib6_age, 0, NULL);
 
         if (gc_args.more)
-                mod_timer(net->ipv6.ip6_fib_timer, jiffies +
+                mod_timer(&net->ipv6.ip6_fib_timer, jiffies +
                           net->ipv6.sysctl.ip6_rt_gc_interval);
-        else {
-                del_timer(net->ipv6.ip6_fib_timer);
-                net->ipv6.ip6_fib_timer->expires = 0;
-        }
+        else
+                del_timer(&net->ipv6.ip6_fib_timer);
         spin_unlock_bh(&fib6_gc_lock);
 }
 
@@ -1478,16 +1476,7 @@ static void fib6_gc_timer_cb(unsigned long arg)
 
 static int fib6_net_init(struct net *net)
 {
-        int ret;
-        struct timer_list *timer;
-
-        ret = -ENOMEM;
-        timer = kzalloc(sizeof(*timer), GFP_KERNEL);
-        if (!timer)
-                goto out;
-
-        setup_timer(timer, fib6_gc_timer_cb, (unsigned long)net);
-        net->ipv6.ip6_fib_timer = timer;
+        setup_timer(&net->ipv6.ip6_fib_timer, fib6_gc_timer_cb, (unsigned long)net);
 
         net->ipv6.rt6_stats = kzalloc(sizeof(*net->ipv6.rt6_stats), GFP_KERNEL);
         if (!net->ipv6.rt6_stats)
@@ -1521,9 +1510,7 @@ static int fib6_net_init(struct net *net)
 #endif
         fib6_tables_init(net);
 
-        ret = 0;
-out:
-        return ret;
+        return 0;
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
 out_fib6_main_tbl:
@@ -1534,15 +1521,14 @@ out_fib_table_hash:
 out_rt6_stats:
         kfree(net->ipv6.rt6_stats);
 out_timer:
-        kfree(timer);
-        goto out;
+        return -ENOMEM;
  }
 
 static void fib6_net_exit(struct net *net)
 {
         rt6_ifdown(net, NULL);
-        del_timer_sync(net->ipv6.ip6_fib_timer);
-        kfree(net->ipv6.ip6_fib_timer);
+        del_timer_sync(&net->ipv6.ip6_fib_timer);
+
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
         kfree(net->ipv6.fib6_local_tbl);
 #endif