devlink: Add support for get/set driverinit value (ec01aeb1) · Commits · 戴 / test

include/net/devlink.h

+18 −0

Original line number	Diff line number	Diff line
		@@ -503,6 +503,10 @@ int devlink_params_register(struct devlink *devlink,
		void devlink_params_unregister(struct devlink *devlink,
		const struct devlink_param *params,
		size_t params_count);
		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,
		union devlink_param_value init_val);

		#else

		@@ -711,6 +715,20 @@ devlink_params_unregister(struct devlink *devlink,

		}

		static inline int
		devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
		union devlink_param_value *init_val)
		{
		return -EOPNOTSUPP;
		}

		static inline int
		devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
		union devlink_param_value init_val)
		{
		return -EOPNOTSUPP;
		}

		#endif

		#endif /* _NET_DEVLINK_H_ */

net/core/devlink.c

+77 −0

Original line number	Diff line number	Diff line
		@@ -2645,6 +2645,17 @@ devlink_param_find_by_name(struct list_head *param_list,
		return NULL;
		}

		static struct devlink_param_item *
		devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
		{
		struct devlink_param_item *param_item;

		list_for_each_entry(param_item, param_list, list)
		if (param_item->param->id == param_id)
		return param_item;
		return NULL;
		}

		static bool
		devlink_param_cmode_is_supported(const struct devlink_param *param,
		enum devlink_param_cmode cmode)
		@@ -3966,6 +3977,72 @@ void devlink_params_unregister(struct devlink *devlink,
		}
		EXPORT_SYMBOL_GPL(devlink_params_unregister);

		/**
		* devlink_param_driverinit_value_get - get configuration parameter
		* value for driver initializing
		*
		* @devlink: devlink
		* @param_id: parameter ID
		* @init_val: value of parameter in driverinit configuration mode
		*
		* This function should be used by the driver to get driverinit
		* configuration for initialization after reload command.
		*/
		int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
		union devlink_param_value *init_val)
		{
		struct devlink_param_item *param_item;

		if (!devlink->ops \|\| !devlink->ops->reload)
		return -EOPNOTSUPP;

		param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
		if (!param_item)
		return -EINVAL;

		if (!param_item->driverinit_value_valid \|\|
		!devlink_param_cmode_is_supported(param_item->param,
		DEVLINK_PARAM_CMODE_DRIVERINIT))
		return -EOPNOTSUPP;

		*init_val = param_item->driverinit_value;

		return 0;
		}
		EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);

		/**
		* devlink_param_driverinit_value_set - set value of configuration
		* parameter for driverinit
		* configuration mode
		*
		* @devlink: devlink
		* @param_id: parameter ID
		* @init_val: value of parameter to set for driverinit configuration mode
		*
		* This function should be used by the driver to set driverinit
		* configuration mode default value.
		*/
		int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
		union devlink_param_value init_val)
		{
		struct devlink_param_item *param_item;

		param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
		if (!param_item)
		return -EINVAL;

		if (!devlink_param_cmode_is_supported(param_item->param,
		DEVLINK_PARAM_CMODE_DRIVERINIT))
		return -EOPNOTSUPP;

		param_item->driverinit_value = init_val;
		param_item->driverinit_value_valid = true;

		return 0;
		}
		EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);

		static int __init devlink_module_init(void)
		{
		return genl_register_family(&devlink_nl_family);

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