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Message-ID: <20240206144313.2050392-8-edumazet@google.com>
Date: Tue, 6 Feb 2024 14:43:03 +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: Antoine Tenart <atenart@...nel.org>, netdev@...r.kernel.org, eric.dumazet@...il.com,
Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH v4 net-next 06/15] gtp: 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 per netns.
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
drivers/net/gtp.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index b1919278e931f4e9fb6b2d2ec2feb2193b2cda61..62c601d9f7528d456dc6695814bf01a4d756d2da 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1876,23 +1876,23 @@ static int __net_init gtp_net_init(struct net *net)
return 0;
}
-static void __net_exit gtp_net_exit(struct net *net)
+static void __net_exit gtp_net_exit_batch_rtnl(struct list_head *net_list,
+ struct list_head *dev_to_kill)
{
- struct gtp_net *gn = net_generic(net, gtp_net_id);
- struct gtp_dev *gtp;
- LIST_HEAD(list);
+ struct net *net;
- rtnl_lock();
- list_for_each_entry(gtp, &gn->gtp_dev_list, list)
- gtp_dellink(gtp->dev, &list);
+ list_for_each_entry(net, net_list, exit_list) {
+ struct gtp_net *gn = net_generic(net, gtp_net_id);
+ struct gtp_dev *gtp;
- unregister_netdevice_many(&list);
- rtnl_unlock();
+ list_for_each_entry(gtp, &gn->gtp_dev_list, list)
+ gtp_dellink(gtp->dev, dev_to_kill);
+ }
}
static struct pernet_operations gtp_net_ops = {
.init = gtp_net_init,
- .exit = gtp_net_exit,
+ .exit_batch_rtnl = gtp_net_exit_batch_rtnl,
.id = >p_net_id,
.size = sizeof(struct gtp_net),
};
--
2.43.0.594.gd9cf4e227d-goog
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