/* * net/switchdev/switchdev.c - Switch device API * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/kernel.h>#include <linux/types.h>#include <linux/init.h>#include <linux/mutex.h>#include <linux/notifier.h>#include <linux/netdevice.h>#include <net/switchdev.h> /** *	netdev_switch_parent_id_get - Get ID of a switch *	@dev: port device *	@psid: switch ID * *	Get ID of a switch this port is part of. */int netdev_switch_parent_id_get(struct net_device *dev,				struct netdev_phys_item_id *psid){	const struct net_device_ops *ops = dev->netdev_ops; 	if (!ops->ndo_switch_parent_id_get)		return -EOPNOTSUPP;	return ops->ndo_switch_parent_id_get(dev, psid);}EXPORT_SYMBOL(netdev_switch_parent_id_get); /** *	netdev_switch_port_stp_update - Notify switch device port of STP *					state change *	@dev: port device *	@state: port STP state * *	Notify switch device port of bridge port STP state change. */int netdev_switch_port_stp_update(struct net_device *dev, u8 state){	const struct net_device_ops *ops = dev->netdev_ops; 	if (!ops->ndo_switch_port_stp_update)		return -EOPNOTSUPP;	WARN_ON(!ops->ndo_switch_parent_id_get);	return ops->ndo_switch_port_stp_update(dev, state);}EXPORT_SYMBOL(netdev_switch_port_stp_update); static DEFINE_MUTEX(netdev_switch_mutex);static RAW_NOTIFIER_HEAD(netdev_switch_notif_chain); /** *	register_netdev_switch_notifier - Register nofifier *	@nb: notifier_block * *	Register switch device notifier. This should be used by code *	which needs to monitor events happening in particular device. *	Return values are same as for atomic_notifier_chain_register(). */int register_netdev_switch_notifier(struct notifier_block *nb){	int err; 	mutex_lock(&netdev_switch_mutex);	err = raw_notifier_chain_register(&netdev_switch_notif_chain, nb);	mutex_unlock(&netdev_switch_mutex);	return err;}EXPORT_SYMBOL(register_netdev_switch_notifier); /** *	unregister_netdev_switch_notifier - Unregister nofifier *	@nb: notifier_block * *	Unregister switch device notifier. *	Return values are same as for atomic_notifier_chain_unregister(). */int unregister_netdev_switch_notifier(struct notifier_block *nb){	int err; 	mutex_lock(&netdev_switch_mutex);	err = raw_notifier_chain_unregister(&netdev_switch_notif_chain, nb);	mutex_unlock(&netdev_switch_mutex);	return err;}EXPORT_SYMBOL(unregister_netdev_switch_notifier); /** *	call_netdev_switch_notifiers - Call nofifiers *	@val: value passed unmodified to notifier function *	@dev: port device *	@info: notifier information data * *	Call all network notifier blocks. This should be called by driver *	when it needs to propagate hardware event. *	Return values are same as for atomic_notifier_call_chain(). */int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,				 struct netdev_switch_notifier_info *info){	int err; 	info->dev = dev;	mutex_lock(&netdev_switch_mutex);	err = raw_notifier_call_chain(&netdev_switch_notif_chain, val, info);	mutex_unlock(&netdev_switch_mutex);	return err;}EXPORT_SYMBOL(call_netdev_switch_notifiers); /** *	netdev_switch_port_bridge_setlink - Notify switch device port of bridge *	port attributes * *	@dev: port device *	@nlh: netlink msg with bridge port attributes *	@flags: bridge setlink flags * *	Notify switch device port of bridge port attributes */int netdev_switch_port_bridge_setlink(struct net_device *dev,				      struct nlmsghdr *nlh, u16 flags){	const struct net_device_ops *ops = dev->netdev_ops; 	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))		return 0; 	if (!ops->ndo_bridge_setlink)		return -EOPNOTSUPP; 	return ops->ndo_bridge_setlink(dev, nlh, flags);}EXPORT_SYMBOL(netdev_switch_port_bridge_setlink); /** *	netdev_switch_port_bridge_dellink - Notify switch device port of bridge *	port attribute delete * *	@dev: port device *	@nlh: netlink msg with bridge port attributes *	@flags: bridge setlink flags * *	Notify switch device port of bridge port attribute delete */int netdev_switch_port_bridge_dellink(struct net_device *dev,				      struct nlmsghdr *nlh, u16 flags){	const struct net_device_ops *ops = dev->netdev_ops; 	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))		return 0; 	if (!ops->ndo_bridge_dellink)		return -EOPNOTSUPP; 	return ops->ndo_bridge_dellink(dev, nlh, flags);}EXPORT_SYMBOL(netdev_switch_port_bridge_dellink); /** *	ndo_dflt_netdev_switch_port_bridge_setlink - default ndo bridge setlink *						     op for master devices * *	@dev: port device *	@nlh: netlink msg with bridge port attributes *	@flags: bridge setlink flags * *	Notify master device slaves of bridge port attributes */int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,					       struct nlmsghdr *nlh, u16 flags){	struct net_device *lower_dev;	struct list_head *iter;	int ret = 0, err = 0; 	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))		return ret; 	netdev_for_each_lower_dev(dev, lower_dev, iter) {		err = netdev_switch_port_bridge_setlink(lower_dev, nlh, flags);		if (err && err != -EOPNOTSUPP)			ret = err;	} 	return ret;}EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_setlink); /** *	ndo_dflt_netdev_switch_port_bridge_dellink - default ndo bridge dellink *						     op for master devices * *	@dev: port device *	@nlh: netlink msg with bridge port attributes *	@flags: bridge dellink flags * *	Notify master device slaves of bridge port attribute deletes */int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev,					       struct nlmsghdr *nlh, u16 flags){	struct net_device *lower_dev;	struct list_head *iter;	int ret = 0, err = 0; 	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))		return ret; 	netdev_for_each_lower_dev(dev, lower_dev, iter) {		err = netdev_switch_port_bridge_dellink(lower_dev, nlh, flags);		if (err && err != -EOPNOTSUPP)			ret = err;	} 	return ret;}EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_dellink);