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/*
* 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);
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