/* * include/net/net_vrf.h - adds vrf dev structure definitions * Copyright (c) 2015 Cumulus Networks * * 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. */ #ifndef __LINUX_NET_VRF_H#define __LINUX_NET_VRF_H struct net_vrf_dev {	struct rcu_head		rcu;	int                     ifindex; /* ifindex of master dev */	u32                     tb_id;   /* table id for VRF */}; struct slave {	struct list_head	list;	struct net_device	*dev;}; struct slave_queue {	struct list_head	all_slaves;}; struct net_vrf {	struct slave_queue	queue;	struct rtable           *rth;	u32			tb_id;};  #if IS_ENABLED(CONFIG_NET_VRF)/* called with rcu_read_lock() */static inline int vrf_master_ifindex_rcu(const struct net_device *dev){	struct net_vrf_dev *vrf_ptr;	int ifindex = 0; 	if (!dev)		return 0; 	if (netif_is_vrf(dev)) {		ifindex = dev->ifindex;	} else {		vrf_ptr = rcu_dereference(dev->vrf_ptr);		if (vrf_ptr)			ifindex = vrf_ptr->ifindex;	} 	return ifindex;} static inline int vrf_master_ifindex(const struct net_device *dev){	int ifindex; 	rcu_read_lock();	ifindex = vrf_master_ifindex_rcu(dev);	rcu_read_unlock(); 	return ifindex;} /* called with rcu_read_lock */static inline u32 vrf_dev_table_rcu(const struct net_device *dev){	u32 tb_id = 0; 	if (dev) {		struct net_vrf_dev *vrf_ptr; 		vrf_ptr = rcu_dereference(dev->vrf_ptr);		if (vrf_ptr)			tb_id = vrf_ptr->tb_id;	}	return tb_id;} static inline u32 vrf_dev_table(const struct net_device *dev){	u32 tb_id; 	rcu_read_lock();	tb_id = vrf_dev_table_rcu(dev);	rcu_read_unlock(); 	return tb_id;} static inline u32 vrf_dev_table_ifindex(struct net *net, int ifindex){	struct net_device *dev;	u32 tb_id = 0; 	if (!ifindex)		return 0; 	rcu_read_lock(); 	dev = dev_get_by_index_rcu(net, ifindex);	if (dev)		tb_id = vrf_dev_table_rcu(dev); 	rcu_read_unlock(); 	return tb_id;} /* called with rtnl */static inline u32 vrf_dev_table_rtnl(const struct net_device *dev){	u32 tb_id = 0; 	if (dev) {		struct net_vrf_dev *vrf_ptr; 		vrf_ptr = rtnl_dereference(dev->vrf_ptr);		if (vrf_ptr)			tb_id = vrf_ptr->tb_id;	}	return tb_id;} /* caller has already checked netif_is_vrf(dev) */static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev){	struct rtable *rth = ERR_PTR(-ENETUNREACH);	struct net_vrf *vrf = netdev_priv(dev); 	if (vrf) {		rth = vrf->rth;		atomic_inc(&rth->dst.__refcnt);	}	return rth;} #elsestatic inline int vrf_master_ifindex_rcu(const struct net_device *dev){	return 0;} static inline int vrf_master_ifindex(const struct net_device *dev){	return 0;} static inline u32 vrf_dev_table_rcu(const struct net_device *dev){	return 0;} static inline u32 vrf_dev_table(const struct net_device *dev){	return 0;} static inline u32 vrf_dev_table_ifindex(struct net *net, int ifindex){	return 0;} static inline u32 vrf_dev_table_rtnl(const struct net_device *dev){	return 0;} static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev){	return ERR_PTR(-ENETUNREACH);}#endif #endif /* __LINUX_NET_VRF_H */