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gtp: use exit_batch_rtnl() method

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[ Upstream commit 6eedda01b2bfdcf427b37759e053dc27232f3af1 ]

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@google.com>
Reviewed-by: Antoine Tenart <atenart@kernel.org>
Link: https://lore.kernel.org/r/20240206144313.2050392-8-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 46841c7053e6 ("gtp: Use for_each_netdev_rcu() in gtp_genl_dump_pdp().")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet
2024-02-06 14:43:03 +00:00
committed by Greg Kroah-Hartman
parent 2131315571
commit 85d9663360
1 changed files with 10 additions and 10 deletions
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20
drivers/net/gtp.c
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@@ -1355,23 +1355,23 @@ 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 = &gtp_net_id,
.size = sizeof(struct gtp_net),
};