[PATCH net-next v2 1/4] devlink: Add APIs to publish/unpublish the port parameters.

[Sudarsana Reddy Kalluru <skalluru@marvell.com>]

Kernel has no interface to publish the devlink port parameters. This is
required for exporting the port params to the user space, so that user
can read or update the port params.
This patch adds devlink interfaces (for drivers) to publish/unpublish the
devlink port parameters.

Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
---
 include/net/devlink.h |  2 ++
 net/core/devlink.c    | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 6625ea0..47a1e8f 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -653,6 +653,8 @@ int devlink_port_params_register(struct devlink_port *devlink_port,
 void devlink_port_params_unregister(struct devlink_port *devlink_port,
 				    const struct devlink_param *params,
 				    size_t params_count);
+void devlink_port_params_publish(struct devlink_port *devlink_port);
+void devlink_port_params_unpublish(struct devlink_port *ddevlink_port);
 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
 				       union devlink_param_value *init_val);
 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 89c5337..0cd7994 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -6380,6 +6380,48 @@ void devlink_port_params_unregister(struct devlink_port *devlink_port,
 }
 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
 
+/**
+ *	devlink_port_params_publish - publish port configuration parameters
+ *
+ *	@devlink_port: devlink port
+ *
+ *	Publish previously registered port configuration parameters.
+ */
+void devlink_port_params_publish(struct devlink_port *devlink_port)
+{
+	struct devlink_param_item *param_item;
+
+	list_for_each_entry(param_item, &devlink_port->param_list, list) {
+		if (param_item->published)
+			continue;
+		param_item->published = true;
+		devlink_param_notify(devlink_port->devlink, devlink_port->index,
+				     param_item, DEVLINK_CMD_PORT_PARAM_NEW);
+	}
+}
+EXPORT_SYMBOL_GPL(devlink_port_params_publish);
+
+/**
+ *	devlink_port_params_unpublish - unpublish port configuration parameters
+ *
+ *	@devlink_port: devlink port
+ *
+ *	Unpublish previously registered port configuration parameters.
+ */
+void devlink_port_params_unpublish(struct devlink_port *devlink_port)
+{
+	struct devlink_param_item *param_item;
+
+	list_for_each_entry(param_item, &devlink_port->param_list, list) {
+		if (!param_item->published)
+			continue;
+		param_item->published = false;
+		devlink_param_notify(devlink_port->devlink, devlink_port->index,
+				     param_item, DEVLINK_CMD_PORT_PARAM_DEL);
+	}
+}
+EXPORT_SYMBOL_GPL(devlink_port_params_unpublish);
+
 static int
 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
 				     union devlink_param_value *init_val)
-- 
1.8.3.1