netdev - [PATCH 12/21] l2tp: exit_net cleanup check added

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Message-ID: <32b4a85d-85c4-0509-019e-27475ac70d58@virtuozzo.com>
Date:   Sun, 5 Nov 2017 13:01:13 +0300
From:   Vasily Averin <vvs@...tuozzo.com>
To:     netdev@...r.kernel.org
Subject: [PATCH 12/21] 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@...tuozzo.com>
---
 net/l2tp/l2tp_core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 02d6110..109fd36 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1888,6 +1888,7 @@ 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) {
@@ -1897,6 +1898,11 @@ 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++)
+		if (WARN(!hlist_empty(&pn->l2tp_session_hlist[hash]),
+			 "net %p exit: l2tp session_hlist is not empty\n", net))
+			break;
 }
 
 static struct pernet_operations l2tp_net_ops = {
-- 
2.7.4