diff --git a/include/net/switchdev.h b/include/net/switchdev.h index 8a6d1641fd9bb8d1c3ddc053c479a9f0531b5b18..7f8d74372d87051645492552d426f3c96a7010a3 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -11,12 +11,27 @@ #define _LINUX_SWITCHDEV_H_ #include +#include + +struct netdev_switch_notifier_info { + struct net_device *dev; +}; + +static inline struct net_device * +netdev_switch_notifier_info_to_dev(const struct netdev_switch_notifier_info *info) +{ + return info->dev; +} #ifdef CONFIG_NET_SWITCHDEV int netdev_switch_parent_id_get(struct net_device *dev, struct netdev_phys_item_id *psid); int netdev_switch_port_stp_update(struct net_device *dev, u8 state); +int register_netdev_switch_notifier(struct notifier_block *nb); +int unregister_netdev_switch_notifier(struct notifier_block *nb); +int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev, + struct netdev_switch_notifier_info *info); #else @@ -32,6 +47,22 @@ static inline int netdev_switch_port_stp_update(struct net_device *dev, return -EOPNOTSUPP; } +static inline int register_netdev_switch_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline int unregister_netdev_switch_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev, + struct netdev_switch_notifier_info *info); +{ + return NOTIFY_DONE; +} + #endif #endif /* _LINUX_SWITCHDEV_H_ */ diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index d162b21b14bd23b2f65a7dac64ed2cc1a7e14c3e..22e02f4edd99bf318ce2944b7ebd3804425ffd27 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -11,6 +11,8 @@ #include #include #include +#include +#include #include #include @@ -50,3 +52,66 @@ int netdev_switch_port_stp_update(struct net_device *dev, u8 state) 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);