netdev - [PATCH v1 net-next 10/11] can: gw: Use rtnl_register

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Message-ID: <20241011220550.46040-11-kuniyu@amazon.com>
Date: Fri, 11 Oct 2024 15:05:49 -0700
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>
CC: Kuniyuki Iwashima <kuniyu@...zon.com>, Kuniyuki Iwashima
	<kuni1840@...il.com>, <netdev@...r.kernel.org>, Oliver Hartkopp
	<socketcan@...tkopp.net>, Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH v1 net-next 10/11] can: gw: Use rtnl_register_many().

We will remove rtnl_register_module() in favour of rtnl_register_many().

rtnl_register_many() will unwind the previous successful registrations
on failure and simplify module error handling.

Let's use rtnl_register_many() instead.

Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
---
Cc: Oliver Hartkopp <socketcan@...tkopp.net>
Cc: Marc Kleine-Budde <mkl@...gutronix.de>
---
 net/can/gw.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/net/can/gw.c b/net/can/gw.c
index 37528826935e..34d6b8c37b92 100644
--- a/net/can/gw.c
+++ b/net/can/gw.c
@@ -1265,6 +1265,12 @@ static struct pernet_operations cangw_pernet_ops = {
 	.exit_batch = cangw_pernet_exit_batch,
 };
 
+static const struct rtnl_msg_handler cgw_rtnl_msg_handlers[] = {
+	{THIS_MODULE, PF_CAN, RTM_NEWROUTE, cgw_create_job, NULL, 0},
+	{THIS_MODULE, PF_CAN, RTM_DELROUTE, cgw_remove_job, NULL, 0},
+	{THIS_MODULE, PF_CAN, RTM_GETROUTE, NULL, cgw_dump_jobs, 0},
+};
+
 static __init int cgw_module_init(void)
 {
 	int ret;
@@ -1290,27 +1296,13 @@ static __init int cgw_module_init(void)
 	if (ret)
 		goto out_register_notifier;
 
-	ret = rtnl_register_module(THIS_MODULE, PF_CAN, RTM_GETROUTE,
-				   NULL, cgw_dump_jobs, 0);
-	if (ret)
-		goto out_rtnl_register1;
-
-	ret = rtnl_register_module(THIS_MODULE, PF_CAN, RTM_NEWROUTE,
-				   cgw_create_job, NULL, 0);
-	if (ret)
-		goto out_rtnl_register2;
-	ret = rtnl_register_module(THIS_MODULE, PF_CAN, RTM_DELROUTE,
-				   cgw_remove_job, NULL, 0);
+	ret = rtnl_register_many(cgw_rtnl_msg_handlers);
 	if (ret)
-		goto out_rtnl_register3;
+		goto out_rtnl_register;
 
 	return 0;
 
-out_rtnl_register3:
-	rtnl_unregister(PF_CAN, RTM_NEWROUTE);
-out_rtnl_register2:
-	rtnl_unregister(PF_CAN, RTM_GETROUTE);
-out_rtnl_register1:
+out_rtnl_register:
 	unregister_netdevice_notifier(&notifier);
 out_register_notifier:
 	kmem_cache_destroy(cgw_cache);
-- 
2.39.5 (Apple Git-154)