devlink: introduce dumpit callbacks for split ops

Introduce dumpit callbacks for generated split ops. Have them
as a thin wrapper around iteration function and allow to pass dump_one()
function pointer directly without need to store in devlink_cmd structs.

Note that the function prototypes are temporary until the generated ones
will replace them in a follow-up patch.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-6-jiri@resnulli.usSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/devlink/dev.c

@@ -1229,10 +1229,9 @@ int devlink_nl_selftests_get_doit(struct sk_buff *skb, struct genl_info *info)
 	return genlmsg_reply(msg, info);
 }
 
-static int
-devlink_nl_cmd_selftests_get_dump_one(struct sk_buff *msg,
-				      struct devlink *devlink,
-				      struct netlink_callback *cb)
+static int devlink_nl_selftests_get_dump_one(struct sk_buff *msg,
+					     struct devlink *devlink,
+					     struct netlink_callback *cb)
 {
 	if (!devlink->ops->selftest_check)
 		return 0;
@@ -1243,9 +1242,11 @@ devlink_nl_cmd_selftests_get_dump_one(struct sk_buff *msg,
 					 cb->extack);
 }
 
-const struct devlink_cmd devl_cmd_selftests_get = {
-	.dump_one		= devlink_nl_cmd_selftests_get_dump_one,
-};
+int devlink_nl_selftests_get_dumpit(struct sk_buff *skb,
+				    struct netlink_callback *cb)
+{
+	return devlink_nl_dumpit(skb, cb, devlink_nl_selftests_get_dump_one);
+}
 
 static int devlink_selftest_result_put(struct sk_buff *skb, unsigned int id,
 				       enum devlink_selftest_status test_status)

net/devlink/devl_internal.h

@@ -117,10 +117,6 @@ typedef int devlink_nl_dump_one_func_t(struct sk_buff *msg,
 				       struct devlink *devlink,
 				       struct netlink_callback *cb);
 
-struct devlink_cmd {
-	devlink_nl_dump_one_func_t *dump_one;
-};
-
 extern const struct genl_small_ops devlink_nl_small_ops[54];
 
 struct devlink *
@@ -131,7 +127,6 @@ void devlink_notify_register(struct devlink *devlink);
 
 int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb,
 		      devlink_nl_dump_one_func_t *dump_one);
-int devlink_nl_instance_iter_dumpit(struct sk_buff *msg, struct netlink_callback *cb);
 
 static inline struct devlink_nl_dump_state *
 devlink_dump_state(struct netlink_callback *cb)
@@ -151,22 +146,6 @@ devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 	return 0;
 }
 
-/* Commands */
-extern const struct devlink_cmd devl_cmd_port_get;
-extern const struct devlink_cmd devl_cmd_sb_get;
-extern const struct devlink_cmd devl_cmd_sb_pool_get;
-extern const struct devlink_cmd devl_cmd_sb_port_pool_get;
-extern const struct devlink_cmd devl_cmd_sb_tc_pool_bind_get;
-extern const struct devlink_cmd devl_cmd_param_get;
-extern const struct devlink_cmd devl_cmd_region_get;
-extern const struct devlink_cmd devl_cmd_health_reporter_get;
-extern const struct devlink_cmd devl_cmd_trap_get;
-extern const struct devlink_cmd devl_cmd_trap_group_get;
-extern const struct devlink_cmd devl_cmd_trap_policer_get;
-extern const struct devlink_cmd devl_cmd_rate_get;
-extern const struct devlink_cmd devl_cmd_linecard_get;
-extern const struct devlink_cmd devl_cmd_selftests_get;
-
 /* Notify */
 void devlink_notify(struct devlink *devlink, enum devlink_command cmd);
 
@@ -215,21 +194,40 @@ int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info)
 int devlink_nl_cmd_eswitch_set_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_selftests_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_selftests_get_dumpit(struct sk_buff *skb,
+				    struct netlink_callback *cb);
 int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
 int devlink_nl_rate_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_rate_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
 int devlink_nl_linecard_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_linecard_get_dumpit(struct sk_buff *skb,
+				   struct netlink_callback *cb);
 int devlink_nl_sb_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_sb_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
 int devlink_nl_sb_pool_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_sb_pool_get_dumpit(struct sk_buff *skb,
+				  struct netlink_callback *cb);
 int devlink_nl_sb_port_pool_get_doit(struct sk_buff *skb,
 				     struct genl_info *info);
+int devlink_nl_sb_port_pool_get_dumpit(struct sk_buff *skb,
+				       struct netlink_callback *cb);
 int devlink_nl_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
 					struct genl_info *info);
+int devlink_nl_sb_tc_pool_bind_get_dumpit(struct sk_buff *skb,
+					  struct netlink_callback *cb);
 int devlink_nl_param_get_doit(struct sk_buff *skb,
 			      struct genl_info *info);
+int devlink_nl_param_get_dumpit(struct sk_buff *skb,
+				struct netlink_callback *cb);
 int devlink_nl_region_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_region_get_dumpit(struct sk_buff *skb,
+				 struct netlink_callback *cb);
 int devlink_nl_health_reporter_get_doit(struct sk_buff *skb,
 					struct genl_info *info);
+int devlink_nl_health_reporter_get_dumpit(struct sk_buff *skb,
+					  struct netlink_callback *cb);
 int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 					    struct genl_info *info);
 int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
@@ -243,6 +241,11 @@ int devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
 int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
 					     struct genl_info *info);
 int devlink_nl_trap_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_trap_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
+int devlink_nl_trap_group_get_dumpit(struct sk_buff *skb,
+				     struct netlink_callback *cb);
 int devlink_nl_trap_group_get_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_trap_policer_get_doit(struct sk_buff *skb,
 				     struct genl_info *info);
+int devlink_nl_trap_policer_get_dumpit(struct sk_buff *skb,
+				       struct netlink_callback *cb);

net/devlink/health.c

@@ -384,10 +384,9 @@ int devlink_nl_health_reporter_get_doit(struct sk_buff *skb,
 	return genlmsg_reply(msg, info);
 }
 
-static int
-devlink_nl_cmd_health_reporter_get_dump_one(struct sk_buff *msg,
-					    struct devlink *devlink,
-					    struct netlink_callback *cb)
+static int devlink_nl_health_reporter_get_dump_one(struct sk_buff *msg,
+						   struct devlink *devlink,
+						   struct netlink_callback *cb)
 {
 	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
 	struct devlink_health_reporter *reporter;
@@ -434,9 +433,12 @@ devlink_nl_cmd_health_reporter_get_dump_one(struct sk_buff *msg,
 	return 0;
 }
 
-const struct devlink_cmd devl_cmd_health_reporter_get = {
-	.dump_one		= devlink_nl_cmd_health_reporter_get_dump_one,
-};
+int devlink_nl_health_reporter_get_dumpit(struct sk_buff *skb,
+					  struct netlink_callback *cb)
+{
+	return devlink_nl_dumpit(skb, cb,
+				 devlink_nl_health_reporter_get_dump_one);
+}
 
 int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 					    struct genl_info *info)

net/devlink/netlink.c

@@ -170,23 +170,6 @@ void devlink_nl_post_doit(const struct genl_split_ops *ops,
 	devlink_put(devlink);
 }
 
-static const struct devlink_cmd *devl_cmds[] = {
-	[DEVLINK_CMD_PORT_GET]		= &devl_cmd_port_get,
-	[DEVLINK_CMD_SB_GET]		= &devl_cmd_sb_get,
-	[DEVLINK_CMD_SB_POOL_GET]	= &devl_cmd_sb_pool_get,
-	[DEVLINK_CMD_SB_PORT_POOL_GET]	= &devl_cmd_sb_port_pool_get,
-	[DEVLINK_CMD_SB_TC_POOL_BIND_GET] = &devl_cmd_sb_tc_pool_bind_get,
-	[DEVLINK_CMD_PARAM_GET]		= &devl_cmd_param_get,
-	[DEVLINK_CMD_REGION_GET]	= &devl_cmd_region_get,
-	[DEVLINK_CMD_HEALTH_REPORTER_GET] = &devl_cmd_health_reporter_get,
-	[DEVLINK_CMD_TRAP_GET]		= &devl_cmd_trap_get,
-	[DEVLINK_CMD_TRAP_GROUP_GET]	= &devl_cmd_trap_group_get,
-	[DEVLINK_CMD_TRAP_POLICER_GET]	= &devl_cmd_trap_policer_get,
-	[DEVLINK_CMD_RATE_GET]		= &devl_cmd_rate_get,
-	[DEVLINK_CMD_LINECARD_GET]	= &devl_cmd_linecard_get,
-	[DEVLINK_CMD_SELFTESTS_GET]	= &devl_cmd_selftests_get,
-};
-
 int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb,
 		      devlink_nl_dump_one_func_t *dump_one)
 {
@@ -220,15 +203,6 @@ int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb,
 	return msg->len;
 }
 
-int devlink_nl_instance_iter_dumpit(struct sk_buff *msg,
-				    struct netlink_callback *cb)
-{
-	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
-	const struct devlink_cmd *cmd = devl_cmds[info->op.cmd];
-
-	return devlink_nl_dumpit(msg, cb, cmd->dump_one);
-}
-
 struct genl_family devlink_nl_family __ro_after_init = {
 	.name		= DEVLINK_GENL_NAME,
 	.version	= DEVLINK_GENL_VERSION,