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ipv6: replace global gc_args with local variable

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Global variable gc_args is only used in fib6_run_gc() and functions
called from it. As fib6_run_gc() makes sure there is at most one
instance of fib6_clean_all() running at any moment, we can replace
gc_args with a local variable which will be needed once multiple
instances (per netns) of garbage collector are allowed.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kubeček 2016-03-08 14:44:25 +01:00 committed by David S. Miller
parent 02daec7c22
commit 3570df914f
1 changed files with 8 additions and 6 deletions
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14
net/ipv6/ip6_fib.c
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@ -1725,14 +1725,15 @@ static void fib6_flush_trees(struct net *net)
* Garbage collection
*/
static struct fib6_gc_args
struct fib6_gc_args
{
int timeout;
int more;
} gc_args;
};
static int fib6_age(struct rt6_info *rt, void *arg)
{
struct fib6_gc_args *gc_args = arg;
unsigned long now = jiffies;
/*
@ -1748,10 +1749,10 @@ static int fib6_age(struct rt6_info *rt, void *arg)
RT6_TRACE("expiring %p\n", rt);
return -1;
}
gc_args.more++;
gc_args->more++;
} else if (rt->rt6i_flags & RTF_CACHE) {
if (atomic_read(&rt->dst.__refcnt) == 0 &&
time_after_eq(now, rt->dst.lastuse + gc_args.timeout)) {
time_after_eq(now, rt->dst.lastuse + gc_args->timeout)) {
RT6_TRACE("aging clone %p\n", rt);
return -1;
} else if (rt->rt6i_flags & RTF_GATEWAY) {
@ -1769,7 +1770,7 @@ static int fib6_age(struct rt6_info *rt, void *arg)
return -1;
}
}
gc_args.more++;
gc_args->more++;
}
return 0;
@ -1779,6 +1780,7 @@ static DEFINE_SPINLOCK(fib6_gc_lock);
void fib6_run_gc(unsigned long expires, struct net *net, bool force)
{
struct fib6_gc_args gc_args;
unsigned long now;
if (force) {
@ -1792,7 +1794,7 @@ void fib6_run_gc(unsigned long expires, struct net *net, bool force)
gc_args.more = icmp6_dst_gc();
fib6_clean_all(net, fib6_age, NULL);
fib6_clean_all(net, fib6_age, &gc_args);
now = jiffies;
net->ipv6.ip6_rt_last_gc = now;