netdev - [PATCH v1 net-next 08/11] ipmr: Use rtnl_register

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Message-ID: <20241011220550.46040-9-kuniyu@amazon.com>
Date: Fri, 11 Oct 2024 15:05:47 -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>
Subject: [PATCH v1 net-next 08/11] ipmr: Use rtnl_register_many().

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

When it succeeds for built-in callers, rtnl_register_many() guarantees
all rtnetlink types in the passed array are supported, and there is no
chance that a part of message types is not supported.

Let's use rtnl_register_many() instead.

Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
---
 net/ipv4/ipmr.c  | 19 ++++++++++---------
 net/ipv6/ip6mr.c | 12 ++++++++----
 2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 089864c6a35e..2a5a6927229f 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -3139,6 +3139,14 @@ static struct pernet_operations ipmr_net_ops = {
 	.exit_batch = ipmr_net_exit_batch,
 };
 
+static const struct rtnl_msg_handler ipmr_rtnl_msg_handlers[] = {
+	{NULL, RTNL_FAMILY_IPMR, RTM_GETLINK, NULL, ipmr_rtm_dumplink, 0},
+	{NULL, RTNL_FAMILY_IPMR, RTM_NEWROUTE, ipmr_rtm_route, NULL, 0},
+	{NULL, RTNL_FAMILY_IPMR, RTM_DELROUTE, ipmr_rtm_route, NULL, 0},
+	{NULL, RTNL_FAMILY_IPMR, RTM_GETROUTE,
+	 ipmr_rtm_getroute, ipmr_rtm_dumproute, 0},
+};
+
 int __init ip_mr_init(void)
 {
 	int err;
@@ -3159,15 +3167,8 @@ int __init ip_mr_init(void)
 		goto add_proto_fail;
 	}
 #endif
-	rtnl_register(RTNL_FAMILY_IPMR, RTM_GETROUTE,
-		      ipmr_rtm_getroute, ipmr_rtm_dumproute, 0);
-	rtnl_register(RTNL_FAMILY_IPMR, RTM_NEWROUTE,
-		      ipmr_rtm_route, NULL, 0);
-	rtnl_register(RTNL_FAMILY_IPMR, RTM_DELROUTE,
-		      ipmr_rtm_route, NULL, 0);
-
-	rtnl_register(RTNL_FAMILY_IPMR, RTM_GETLINK,
-		      NULL, ipmr_rtm_dumplink, 0);
+	rtnl_register_many(ipmr_rtnl_msg_handlers);
+
 	return 0;
 
 #ifdef CONFIG_IP_PIMSM_V2
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 2ce4ae0d8dc3..8bb7bf4346f0 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1369,6 +1369,11 @@ static struct pernet_operations ip6mr_net_ops = {
 	.exit_batch = ip6mr_net_exit_batch,
 };
 
+static const struct rtnl_msg_handler ip6mr_rtnl_msg_handlers[] = {
+	{THIS_MODULE, RTNL_FAMILY_IP6MR, RTM_GETROUTE,
+	 ip6mr_rtm_getroute, ip6mr_rtm_dumproute, 0},
+};
+
 int __init ip6_mr_init(void)
 {
 	int err;
@@ -1391,9 +1396,8 @@ int __init ip6_mr_init(void)
 		goto add_proto_fail;
 	}
 #endif
-	err = rtnl_register_module(THIS_MODULE, RTNL_FAMILY_IP6MR, RTM_GETROUTE,
-				   ip6mr_rtm_getroute, ip6mr_rtm_dumproute, 0);
-	if (err == 0)
+	err = rtnl_register_many(ip6mr_rtnl_msg_handlers);
+	if (!err)
 		return 0;
 
 #ifdef CONFIG_IPV6_PIMSM_V2
@@ -1410,7 +1414,7 @@ int __init ip6_mr_init(void)
 
 void ip6_mr_cleanup(void)
 {
-	rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE);
+	rtnl_unregister_many(ip6mr_rtnl_msg_handlers);
 #ifdef CONFIG_IPV6_PIMSM_V2
 	inet6_del_protocol(&pim6_protocol, IPPROTO_PIM);
 #endif
-- 
2.39.5 (Apple Git-154)