l2tp: exit_net cleanup check added

Be sure that l2tp_session_hlist array initialized in net_init hook
was return to initial state.

Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 350fcd3..115918a 100644 (file)
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1833,6 +1833,7 @@ static __net_exit void l2tp_exit_net(struct net *net)
 {
        struct l2tp_net *pn = l2tp_pernet(net);
        struct l2tp_tunnel *tunnel = NULL;
+       int hash;
 
        rcu_read_lock_bh();
        list_for_each_entry_rcu(tunnel, &pn->l2tp_tunnel_list, list) {
@@ -1842,6 +1843,9 @@ static __net_exit void l2tp_exit_net(struct net *net)
 
        flush_workqueue(l2tp_wq);
        rcu_barrier();
+
+       for (hash = 0; hash < L2TP_HASH_SIZE_2; hash++)
+               WARN_ON_ONCE(!hlist_empty(&pn->l2tp_session_hlist[hash]));
 }
 
 static struct pernet_operations l2tp_net_ops = {