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Message-ID: <20240201170937.3549878-10-edumazet@google.com>
Date: Thu, 1 Feb 2024 17:09:30 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, eric.dumazet@...il.com,
Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 09/16] vxlan: use exit_batch_rtnl() method
exit_batch_rtnl() is called while RTNL is held,
and devices to be unregistered can be queued in the dev_kill_list.
This saves one rtnl_lock()/rtnl_unlock() pair per netns
and one unregister_netdevice_many() call.
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
drivers/net/vxlan/vxlan_core.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 16106e088c6301d3aaa47dd73985107945735b6e..df664de4b2b6cc361363b804e7ad531d59e2cdfa 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -4846,23 +4846,25 @@ static void vxlan_destroy_tunnels(struct net *net, struct list_head *head)
}
-static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
+static void __net_exit vxlan_exit_batch_rtnl(struct list_head *net_list,
+ struct list_head *dev_to_kill)
{
struct net *net;
- LIST_HEAD(list);
- unsigned int h;
+ ASSERT_RTNL();
list_for_each_entry(net, net_list, exit_list) {
struct vxlan_net *vn = net_generic(net, vxlan_net_id);
- unregister_nexthop_notifier(net, &vn->nexthop_notifier_block);
+ __unregister_nexthop_notifier(net, &vn->nexthop_notifier_block);
+
+ vxlan_destroy_tunnels(net, dev_to_kill);
}
- rtnl_lock();
- list_for_each_entry(net, net_list, exit_list)
- vxlan_destroy_tunnels(net, &list);
+}
- unregister_netdevice_many(&list);
- rtnl_unlock();
+static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
+{
+ struct net *net;
+ unsigned int h;
list_for_each_entry(net, net_list, exit_list) {
struct vxlan_net *vn = net_generic(net, vxlan_net_id);
@@ -4875,6 +4877,7 @@ static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
static struct pernet_operations vxlan_net_ops = {
.init = vxlan_init_net,
.exit_batch = vxlan_exit_batch_net,
+ .exit_batch_rtnl = vxlan_exit_batch_rtnl,
.id = &vxlan_net_id,
.size = sizeof(struct vxlan_net),
};
--
2.43.0.429.g432eaa2c6b-goog
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