250 lines
5.2 KiB
C
250 lines
5.2 KiB
C
/*
|
|
* include/net/l3mdev.h - L3 master device API
|
|
* Copyright (c) 2015 Cumulus Networks
|
|
* Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
|
|
*
|
|
* 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 _NET_L3MDEV_H_
|
|
#define _NET_L3MDEV_H_
|
|
|
|
/**
|
|
* struct l3mdev_ops - l3mdev operations
|
|
*
|
|
* @l3mdev_fib_table: Get FIB table id to use for lookups
|
|
*
|
|
* @l3mdev_get_rtable: Get cached IPv4 rtable (dst_entry) for device
|
|
*
|
|
* @l3mdev_get_saddr: Get source address for a flow
|
|
*
|
|
* @l3mdev_get_rt6_dst: Get cached IPv6 rt6_info (dst_entry) for device
|
|
*/
|
|
|
|
struct l3mdev_ops {
|
|
u32 (*l3mdev_fib_table)(const struct net_device *dev);
|
|
|
|
/* IPv4 ops */
|
|
struct rtable * (*l3mdev_get_rtable)(const struct net_device *dev,
|
|
const struct flowi4 *fl4);
|
|
int (*l3mdev_get_saddr)(struct net_device *dev,
|
|
struct flowi4 *fl4);
|
|
|
|
/* IPv6 ops */
|
|
struct dst_entry * (*l3mdev_get_rt6_dst)(const struct net_device *dev,
|
|
const struct flowi6 *fl6);
|
|
};
|
|
|
|
#ifdef CONFIG_NET_L3_MASTER_DEV
|
|
|
|
int l3mdev_master_ifindex_rcu(struct net_device *dev);
|
|
static inline int l3mdev_master_ifindex(struct net_device *dev)
|
|
{
|
|
int ifindex;
|
|
|
|
rcu_read_lock();
|
|
ifindex = l3mdev_master_ifindex_rcu(dev);
|
|
rcu_read_unlock();
|
|
|
|
return ifindex;
|
|
}
|
|
|
|
static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
|
|
{
|
|
struct net_device *dev;
|
|
int rc = 0;
|
|
|
|
if (likely(ifindex)) {
|
|
rcu_read_lock();
|
|
|
|
dev = dev_get_by_index_rcu(net, ifindex);
|
|
if (dev)
|
|
rc = l3mdev_master_ifindex_rcu(dev);
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* get index of an interface to use for FIB lookups. For devices
|
|
* enslaved to an L3 master device FIB lookups are based on the
|
|
* master index
|
|
*/
|
|
static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
|
|
{
|
|
return l3mdev_master_ifindex_rcu(dev) ? : dev->ifindex;
|
|
}
|
|
|
|
static inline int l3mdev_fib_oif(struct net_device *dev)
|
|
{
|
|
int oif;
|
|
|
|
rcu_read_lock();
|
|
oif = l3mdev_fib_oif_rcu(dev);
|
|
rcu_read_unlock();
|
|
|
|
return oif;
|
|
}
|
|
|
|
u32 l3mdev_fib_table_rcu(const struct net_device *dev);
|
|
u32 l3mdev_fib_table_by_index(struct net *net, int ifindex);
|
|
static inline u32 l3mdev_fib_table(const struct net_device *dev)
|
|
{
|
|
u32 tb_id;
|
|
|
|
rcu_read_lock();
|
|
tb_id = l3mdev_fib_table_rcu(dev);
|
|
rcu_read_unlock();
|
|
|
|
return tb_id;
|
|
}
|
|
|
|
static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
|
|
const struct flowi4 *fl4)
|
|
{
|
|
if (netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rtable)
|
|
return dev->l3mdev_ops->l3mdev_get_rtable(dev, fl4);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
|
|
{
|
|
struct net_device *dev;
|
|
bool rc = false;
|
|
|
|
if (ifindex == 0)
|
|
return false;
|
|
|
|
rcu_read_lock();
|
|
|
|
dev = dev_get_by_index_rcu(net, ifindex);
|
|
if (dev)
|
|
rc = netif_is_l3_master(dev);
|
|
|
|
rcu_read_unlock();
|
|
|
|
return rc;
|
|
}
|
|
|
|
static inline int l3mdev_get_saddr(struct net *net, int ifindex,
|
|
struct flowi4 *fl4)
|
|
{
|
|
struct net_device *dev;
|
|
int rc = 0;
|
|
|
|
if (ifindex) {
|
|
|
|
rcu_read_lock();
|
|
|
|
dev = dev_get_by_index_rcu(net, ifindex);
|
|
if (dev && netif_is_l3_master(dev) &&
|
|
dev->l3mdev_ops->l3mdev_get_saddr) {
|
|
rc = dev->l3mdev_ops->l3mdev_get_saddr(dev, fl4);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static inline struct dst_entry *l3mdev_get_rt6_dst(const struct net_device *dev,
|
|
const struct flowi6 *fl6)
|
|
{
|
|
if (netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rt6_dst)
|
|
return dev->l3mdev_ops->l3mdev_get_rt6_dst(dev, fl6);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline
|
|
struct dst_entry *l3mdev_rt6_dst_by_oif(struct net *net,
|
|
const struct flowi6 *fl6)
|
|
{
|
|
struct dst_entry *dst = NULL;
|
|
struct net_device *dev;
|
|
|
|
dev = dev_get_by_index(net, fl6->flowi6_oif);
|
|
if (dev) {
|
|
dst = l3mdev_get_rt6_dst(dev, fl6);
|
|
dev_put(dev);
|
|
}
|
|
|
|
return dst;
|
|
}
|
|
|
|
#else
|
|
|
|
static inline int l3mdev_master_ifindex_rcu(struct net_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int l3mdev_master_ifindex(struct net_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
|
|
{
|
|
return dev ? dev->ifindex : 0;
|
|
}
|
|
static inline int l3mdev_fib_oif(struct net_device *dev)
|
|
{
|
|
return dev ? dev->ifindex : 0;
|
|
}
|
|
|
|
static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline u32 l3mdev_fib_table(const struct net_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
|
|
const struct flowi4 *fl4)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int l3mdev_get_saddr(struct net *net, int ifindex,
|
|
struct flowi4 *fl4)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
struct dst_entry *l3mdev_get_rt6_dst(const struct net_device *dev,
|
|
const struct flowi6 *fl6)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline
|
|
struct dst_entry *l3mdev_rt6_dst_by_oif(struct net *net,
|
|
const struct flowi6 *fl6)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _NET_L3MDEV_H_ */
|