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