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/*
* 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;
}
#else
static 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 */
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