/** 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);
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