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From: ktkhai@virtuozzo.com (Kirill Tkhai)
To: linux-security-module@vger.kernel.org
Subject: [PATCH net-next 4/5] ovs: Remove rtnl_lock() from ovs_exit_net()
Date: Thu, 29 Mar 2018 19:21:09 +0300	[thread overview]
Message-ID: <152234046913.19153.5014546114733288472.stgit@localhost.localdomain> (raw)
In-Reply-To: <152234005959.19153.17907173734141707348.stgit@localhost.localdomain>

Here we iterate for_each_net() and removes
vport from alive net to the exiting net.

ovs_net::dps are protected by ovs_mutex(),
and the others, who change it (ovs_dp_cmd_new(),
__dp_destroy()) also take it.
The same with datapath::ports list.

So, we remove rtnl_lock() here.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
---
 net/openvswitch/datapath.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 9746ee30a99b..015e24e08909 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -2363,12 +2363,10 @@ static void __net_exit ovs_exit_net(struct net *dnet)
 	list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
 		__dp_destroy(dp);
 
-	rtnl_lock();
 	down_read(&net_rwsem);
 	for_each_net(net)
 		list_vports_from_net(net, dnet, &head);
 	up_read(&net_rwsem);
-	rtnl_unlock();
 
 	/* Detach all vports from given namespace. */
 	list_for_each_entry_safe(vport, vport_next, &head, detach_list) {

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  parent reply	other threads:[~2018-03-29 16:21 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-29 16:20 [PATCH net-next 0/5] Introduce net_rwsem to protect net_namespace_list Kirill Tkhai
2018-03-29 16:20 ` [PATCH net-next 1/5] net: " Kirill Tkhai
2018-03-29 16:20 ` [PATCH net-next 2/5] net: Don't take rtnl_lock() in wireless_nlevent_flush() Kirill Tkhai
2018-03-29 16:20 ` [PATCH net-next 3/5] security: Remove rtnl_lock() in selinux_xfrm_notify_policyload() Kirill Tkhai
2018-03-29 16:21 ` Kirill Tkhai [this message]
2018-03-29 16:21 ` [PATCH net-next 5/5] net: Remove rtnl_lock() in nf_ct_iterate_destroy() Kirill Tkhai
2018-03-29 17:48 ` [PATCH net-next 0/5] Introduce net_rwsem to protect net_namespace_list David Miller

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