netdev - [PATCH v2 net-next 04/11] net: sched: Use rtnl_register

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Message-ID: <20241014201828.91221-5-kuniyu@amazon.com>
Date: Mon, 14 Oct 2024 13:18:21 -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>, Jamal Hadi Salim
	<jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko
	<jiri@...nulli.us>
Subject: [PATCH v2 net-next 04/11] net: sched: Use rtnl_register_many().

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

When it succeeds, 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>
---
Cc: Jamal Hadi Salim <jhs@...atatu.com>
Cc: Cong Wang <xiyou.wangcong@...il.com>
Cc: Jiri Pirko <jiri@...nulli.us>

v2:
  * Add __initconst
  * Use C99 initialisation
---
 net/sched/act_api.c | 13 ++++++++-----
 net/sched/cls_api.c | 25 ++++++++++++++-----------
 net/sched/sch_api.c | 20 ++++++++++++--------
 3 files changed, 34 insertions(+), 24 deletions(-)

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 2714c4ed928e..5bbfb83ed600 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -2243,13 +2243,16 @@ static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
 	return skb->len;
 }
 
+static const struct rtnl_msg_handler tc_action_rtnl_msg_handlers[] __initconst = {
+	{.msgtype = RTM_NEWACTION, .doit = tc_ctl_action},
+	{.msgtype = RTM_DELACTION, .doit = tc_ctl_action},
+	{.msgtype = RTM_GETACTION, .doit = tc_ctl_action,
+	 .dumpit = tc_dump_action},
+};
+
 static int __init tc_action_init(void)
 {
-	rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
-		      0);
-
+	rtnl_register_many(tc_action_rtnl_msg_handlers);
 	return 0;
 }
 
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 17d97bbe890f..7637f979d689 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -4055,6 +4055,19 @@ static struct pernet_operations tcf_net_ops = {
 	.size = sizeof(struct tcf_net),
 };
 
+static const struct rtnl_msg_handler tc_filter_rtnl_msg_handlers[] __initconst = {
+	{.msgtype = RTM_NEWTFILTER, .doit = tc_new_tfilter,
+	 .flags = RTNL_FLAG_DOIT_UNLOCKED},
+	{.msgtype = RTM_DELTFILTER, .doit = tc_del_tfilter,
+	 .flags = RTNL_FLAG_DOIT_UNLOCKED},
+	{.msgtype = RTM_GETTFILTER, .doit = tc_get_tfilter,
+	 .dumpit = tc_dump_tfilter, .flags = RTNL_FLAG_DOIT_UNLOCKED},
+	{.msgtype = RTM_NEWCHAIN, .doit = tc_ctl_chain},
+	{.msgtype = RTM_DELCHAIN, .doit = tc_ctl_chain},
+	{.msgtype = RTM_GETCHAIN, .doit = tc_ctl_chain,
+	 .dumpit = tc_dump_chain},
+};
+
 static int __init tc_filter_init(void)
 {
 	int err;
@@ -4068,17 +4081,7 @@ static int __init tc_filter_init(void)
 		goto err_register_pernet_subsys;
 
 	xa_init_flags(&tcf_exts_miss_cookies_xa, XA_FLAGS_ALLOC1);
-
-	rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_new_tfilter, NULL,
-		      RTNL_FLAG_DOIT_UNLOCKED);
-	rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_del_tfilter, NULL,
-		      RTNL_FLAG_DOIT_UNLOCKED);
-	rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_get_tfilter,
-		      tc_dump_tfilter, RTNL_FLAG_DOIT_UNLOCKED);
-	rtnl_register(PF_UNSPEC, RTM_NEWCHAIN, tc_ctl_chain, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_DELCHAIN, tc_ctl_chain, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_GETCHAIN, tc_ctl_chain,
-		      tc_dump_chain, 0);
+	rtnl_register_many(tc_filter_rtnl_msg_handlers);
 
 	return 0;
 
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 2eefa4783879..da2da2ab858b 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -2420,6 +2420,17 @@ static struct pernet_operations psched_net_ops = {
 DEFINE_STATIC_KEY_FALSE(tc_skip_wrapper);
 #endif
 
+static const struct rtnl_msg_handler psched_rtnl_msg_handlers[] __initconst = {
+	{.msgtype = RTM_NEWQDISC, .doit = tc_modify_qdisc},
+	{.msgtype = RTM_DELQDISC, .doit = tc_get_qdisc},
+	{.msgtype = RTM_GETQDISC, .doit = tc_get_qdisc,
+	 .dumpit = tc_dump_qdisc},
+	{.msgtype = RTM_NEWTCLASS, .doit = tc_ctl_tclass},
+	{.msgtype = RTM_DELTCLASS, .doit = tc_ctl_tclass},
+	{.msgtype = RTM_GETTCLASS, .doit = tc_ctl_tclass,
+	 .dumpit = tc_dump_tclass},
+};
+
 static int __init pktsched_init(void)
 {
 	int err;
@@ -2438,14 +2449,7 @@ static int __init pktsched_init(void)
 	register_qdisc(&mq_qdisc_ops);
 	register_qdisc(&noqueue_qdisc_ops);
 
-	rtnl_register(PF_UNSPEC, RTM_NEWQDISC, tc_modify_qdisc, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_DELQDISC, tc_get_qdisc, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_GETQDISC, tc_get_qdisc, tc_dump_qdisc,
-		      0);
-	rtnl_register(PF_UNSPEC, RTM_NEWTCLASS, tc_ctl_tclass, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_DELTCLASS, tc_ctl_tclass, NULL, 0);
-	rtnl_register(PF_UNSPEC, RTM_GETTCLASS, tc_ctl_tclass, tc_dump_tclass,
-		      0);
+	rtnl_register_many(psched_rtnl_msg_handlers);
 
 	tc_wrapper_init();
 
-- 
2.39.5 (Apple Git-154)