Commit 6891a346 authored by Benjamin Thery's avatar Benjamin Thery Committed by David S. Miller
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[NETNS][IPV6] route6 - make garbage collection work with multiple network namespaces

This patch makes the necessary changes to make IPv6 dst_entry garbage
collection work with multiple network namespaces.

In ip6_dst_gc(), static local variables are now declared
Signed-off-by: default avatarBenjamin Thery <>
Signed-off-by: default avatarDaniel Lezcano <>
Signed-off-by: default avatarDavid S. Miller <>
parent f2fc6a54
......@@ -42,6 +42,8 @@ struct netns_ipv6 {
struct hlist_head *fib_table_hash;
struct fib6_table *fib6_main_tbl;
struct dst_ops *ip6_dst_ops;
unsigned int ip6_rt_gc_expire;
unsigned long ip6_rt_last_gc;
struct rt6_info *ip6_prohibit_entry;
struct rt6_info *ip6_blk_hole_entry;
......@@ -992,23 +992,22 @@ int icmp6_dst_gc(int *more)
static int ip6_dst_gc(struct dst_ops *ops)
static unsigned expire = 30*HZ;
static unsigned long last_gc;
struct net *net = ops->dst_net;
unsigned long now = jiffies;
if (time_after(last_gc + init_net.ipv6.sysctl.ip6_rt_gc_min_interval, now) &&
atomic_read(&init_net.ipv6.ip6_dst_ops->entries) <= init_net.ipv6.sysctl.ip6_rt_max_size)
if (time_after(net->ipv6.ip6_rt_last_gc + net->ipv6.sysctl.ip6_rt_gc_min_interval, now) &&
atomic_read(&net->ipv6.ip6_dst_ops->entries) <= net->ipv6.sysctl.ip6_rt_max_size)
goto out;
fib6_run_gc(expire, &init_net);
last_gc = now;
if (atomic_read(&init_net.ipv6.ip6_dst_ops->entries) < init_net.ipv6.ip6_dst_ops->gc_thresh)
expire = init_net.ipv6.sysctl.ip6_rt_gc_timeout>>1;
fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net);
net->ipv6.ip6_rt_last_gc = now;
if (atomic_read(&net->ipv6.ip6_dst_ops->entries) < net->ipv6.ip6_dst_ops->gc_thresh)
net->ipv6.ip6_rt_gc_expire = net->ipv6.sysctl.ip6_rt_gc_timeout>>1;
expire -= expire>>init_net.ipv6.sysctl.ip6_rt_gc_elasticity;
return (atomic_read(&init_net.ipv6.ip6_dst_ops->entries) > init_net.ipv6.sysctl.ip6_rt_max_size);
net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>net->ipv6.sysctl.ip6_rt_gc_elasticity;
return (atomic_read(&net->ipv6.ip6_dst_ops->entries) > net->ipv6.sysctl.ip6_rt_max_size);
/* Clean host part of a prefix. Not necessary in radix tree,
......@@ -2615,6 +2614,8 @@ static int ip6_route_net_init(struct net *net)
proc_net_fops_create(net, "ipv6_route", 0, &ipv6_route_proc_fops);
proc_net_fops_create(net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops);
net->ipv6.ip6_rt_gc_expire = 30*HZ;
ret = 0;
return ret;
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