netdev - [patch net-next v2 04/11] devlink: convert port get command to split ops

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Date: Thu, 20 Jul 2023 14:18:22 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	pabeni@...hat.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	moshe@...dia.com,
	saeedm@...dia.com,
	idosch@...dia.com,
	petrm@...dia.com
Subject: [patch net-next v2 04/11] devlink: convert port get command to split ops

From: Jiri Pirko <jiri@...dia.com>

Do the conversion of port get command to split ops. Introduce
devlink_nl_pre_doit_port() helper to indicate port object attribute
parsing and use it as pre_doit() callback.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
 net/devlink/devl_internal.h |  4 +++-
 net/devlink/leftover.c      | 14 +++-----------
 net/devlink/netlink.c       | 29 +++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+), 12 deletions(-)

diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index f6e466be2310..2870be150ee3 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h
@@ -116,7 +116,7 @@ struct devlink_cmd {
 			struct netlink_callback *cb);
 };
 
-extern const struct genl_small_ops devlink_nl_ops[56];
+extern const struct genl_small_ops devlink_nl_ops[55];
 
 struct devlink *
 devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs);
@@ -209,6 +209,8 @@ int devlink_nl_cmd_info_get_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_cmd_flash_update(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_cmd_selftests_get_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
+				 struct genl_info *info);
 int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
 					    struct genl_info *info);
 int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index 2f7130c60333..33f71e8fe8ee 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -1077,8 +1077,8 @@ devlink_rate_is_parent_node(struct devlink_rate *devlink_rate,
 	return false;
 }
 
-static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
-					struct genl_info *info)
+int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
+				 struct genl_info *info)
 {
 	struct devlink_port *devlink_port = info->user_ptr[1];
 	struct sk_buff *msg;
@@ -6301,7 +6301,7 @@ static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
 	return devlink_trap_policer_set(devlink, policer_item, info);
 }
 
-const struct genl_small_ops devlink_nl_ops[56] = {
+const struct genl_small_ops devlink_nl_ops[55] = {
 	{
 		.cmd = DEVLINK_CMD_GET,
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
@@ -6309,14 +6309,6 @@ const struct genl_small_ops devlink_nl_ops[56] = {
 		.dumpit = devlink_nl_instance_iter_dumpit,
 		/* can be retrieved by unprivileged users */
 	},
-	{
-		.cmd = DEVLINK_CMD_PORT_GET,
-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.doit = devlink_nl_cmd_port_get_doit,
-		.dumpit = devlink_nl_instance_iter_dumpit,
-		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
-		/* can be retrieved by unprivileged users */
-	},
 	{
 		.cmd = DEVLINK_CMD_PORT_SET,
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
diff --git a/net/devlink/netlink.c b/net/devlink/netlink.c
index f1a5ba0f6deb..cd35fa637846 100644
--- a/net/devlink/netlink.c
+++ b/net/devlink/netlink.c
@@ -147,6 +147,12 @@ static int devlink_nl_pre_doit(const struct genl_split_ops *ops,
 	return __devlink_nl_pre_doit(skb, info, ops->internal_flags);
 }
 
+static int devlink_nl_pre_doit_port(const struct genl_split_ops *ops,
+				    struct sk_buff *skb, struct genl_info *info)
+{
+	return __devlink_nl_pre_doit(skb, info, DEVLINK_NL_FLAG_NEED_PORT);
+}
+
 static void devlink_nl_post_doit(const struct genl_split_ops *ops,
 				 struct sk_buff *skb, struct genl_info *info)
 {
@@ -213,6 +219,27 @@ int devlink_nl_instance_iter_dumpit(struct sk_buff *msg,
 	return msg->len;
 }
 
+static const struct genl_split_ops devlink_nl_split_ops[] = {
+	{
+		.cmd = DEVLINK_CMD_PORT_GET,
+		.pre_doit = devlink_nl_pre_doit_port,
+		.doit = devlink_nl_cmd_port_get_doit,
+		.post_doit = devlink_nl_post_doit,
+		.flags = GENL_CMD_CAP_DO,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.maxattr = DEVLINK_ATTR_MAX,
+		.policy	= devlink_nl_policy,
+	},
+	{
+		.cmd = DEVLINK_CMD_PORT_GET,
+		.dumpit = devlink_nl_instance_iter_dumpit,
+		.flags = GENL_CMD_CAP_DUMP,
+		.validate = GENL_DONT_VALIDATE_DUMP,
+		.maxattr = DEVLINK_ATTR_MAX,
+		.policy	= devlink_nl_policy,
+	},
+};
+
 struct genl_family devlink_nl_family __ro_after_init = {
 	.name		= DEVLINK_GENL_NAME,
 	.version	= DEVLINK_GENL_VERSION,
@@ -225,6 +252,8 @@ struct genl_family devlink_nl_family __ro_after_init = {
 	.module		= THIS_MODULE,
 	.small_ops	= devlink_nl_ops,
 	.n_small_ops	= ARRAY_SIZE(devlink_nl_ops),
+	.split_ops	= devlink_nl_split_ops,
+	.n_split_ops	= ARRAY_SIZE(devlink_nl_split_ops),
 	.resv_start_op	= DEVLINK_CMD_SELFTESTS_RUN + 1,
 	.mcgrps		= devlink_nl_mcgrps,
 	.n_mcgrps	= ARRAY_SIZE(devlink_nl_mcgrps),
-- 
2.41.0