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