netdev - [PATCH v3 14/21] l2tp: exit

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Message-ID: <debf3bbe-b505-d0fa-4cc1-2d503c04647e@virtuozzo.com>
Date:   Mon, 6 Nov 2017 16:25:08 +0300
From:   Vasily Averin <vvs@...tuozzo.com>
To:     netdev@...r.kernel.org
Subject: [PATCH v3 14/21] 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 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 02d6110..249a2ed 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 +1898,12 @@ 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_ONCE(!hlist_empty(&pn->l2tp_session_hlist[hash]),
+			      "net %x %s: session_hlist is not empty\n",
+			      net->ns.inum, __func__))
+			break;
 }
 
 static struct pernet_operations l2tp_net_ops = {
-- 
2.7.4