299 lines
6.3 KiB
C
299 lines
6.3 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_
|
|
|
|
#include <net/dst.h>
|
|
#include <net/fib_rules.h>
|
|
|
|
/**
|
|
* struct l3mdev_ops - l3mdev operations
|
|
*
|
|
* @l3mdev_fib_table: Get FIB table id to use for lookups
|
|
*
|
|
* @l3mdev_l3_rcv: Hook in L3 receive path
|
|
*
|
|
* @l3mdev_l3_out: Hook in L3 output path
|
|
*
|
|
* @l3mdev_link_scope_lookup: IPv6 lookup for linklocal and mcast destinations
|
|
*/
|
|
|
|
struct l3mdev_ops {
|
|
u32 (*l3mdev_fib_table)(const struct net_device *dev);
|
|
struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev,
|
|
struct sk_buff *skb, u16 proto);
|
|
struct sk_buff * (*l3mdev_l3_out)(struct net_device *dev,
|
|
struct sock *sk, struct sk_buff *skb,
|
|
u16 proto);
|
|
|
|
/* IPv6 ops */
|
|
struct dst_entry * (*l3mdev_link_scope_lookup)(const struct net_device *dev,
|
|
struct flowi6 *fl6);
|
|
};
|
|
|
|
#ifdef CONFIG_NET_L3_MASTER_DEV
|
|
|
|
int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
|
|
struct fib_lookup_arg *arg);
|
|
|
|
void l3mdev_update_flow(struct net *net, struct flowi *fl);
|
|
|
|
int l3mdev_master_ifindex_rcu(const 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;
|
|
}
|
|
|
|
static inline
|
|
struct net_device *l3mdev_master_dev_rcu(const struct net_device *_dev)
|
|
{
|
|
/* netdev_master_upper_dev_get_rcu calls
|
|
* list_first_or_null_rcu to walk the upper dev list.
|
|
* list_first_or_null_rcu does not handle a const arg. We aren't
|
|
* making changes, just want the master device from that list so
|
|
* typecast to remove the const
|
|
*/
|
|
struct net_device *dev = (struct net_device *)_dev;
|
|
struct net_device *master;
|
|
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
if (netif_is_l3_master(dev))
|
|
master = dev;
|
|
else if (netif_is_l3_slave(dev))
|
|
master = netdev_master_upper_dev_get_rcu(dev);
|
|
else
|
|
master = NULL;
|
|
|
|
return master;
|
|
}
|
|
|
|
int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex);
|
|
static inline
|
|
int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex)
|
|
{
|
|
rcu_read_lock();
|
|
ifindex = l3mdev_master_upper_ifindex_by_index_rcu(net, ifindex);
|
|
rcu_read_unlock();
|
|
|
|
return ifindex;
|
|
}
|
|
|
|
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 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;
|
|
}
|
|
|
|
struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6);
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto)
|
|
{
|
|
struct net_device *master = NULL;
|
|
|
|
if (netif_is_l3_slave(skb->dev))
|
|
master = netdev_master_upper_dev_get_rcu(skb->dev);
|
|
else if (netif_is_l3_master(skb->dev))
|
|
master = skb->dev;
|
|
|
|
if (master && master->l3mdev_ops->l3mdev_l3_rcv)
|
|
skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
|
|
{
|
|
return l3mdev_l3_rcv(skb, AF_INET);
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
|
|
{
|
|
return l3mdev_l3_rcv(skb, AF_INET6);
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_l3_out(struct sock *sk, struct sk_buff *skb, u16 proto)
|
|
{
|
|
struct net_device *dev = skb_dst(skb)->dev;
|
|
|
|
if (netif_is_l3_slave(dev)) {
|
|
struct net_device *master;
|
|
|
|
master = netdev_master_upper_dev_get_rcu(dev);
|
|
if (master && master->l3mdev_ops->l3mdev_l3_out)
|
|
skb = master->l3mdev_ops->l3mdev_l3_out(master, sk,
|
|
skb, proto);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return l3mdev_l3_out(sk, skb, AF_INET);
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return l3mdev_l3_out(sk, skb, AF_INET6);
|
|
}
|
|
#else
|
|
|
|
static inline int l3mdev_master_ifindex_rcu(const 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_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline
|
|
int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
struct net_device *l3mdev_master_dev_rcu(const struct net_device *dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
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 bool netif_index_is_l3_master(struct net *net, int ifindex)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline
|
|
struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
|
|
{
|
|
return skb;
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
|
|
{
|
|
return skb;
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return skb;
|
|
}
|
|
|
|
static inline
|
|
struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return skb;
|
|
}
|
|
|
|
static inline
|
|
int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
|
|
struct fib_lookup_arg *arg)
|
|
{
|
|
return 1;
|
|
}
|
|
static inline
|
|
void l3mdev_update_flow(struct net *net, struct flowi *fl)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _NET_L3MDEV_H_ */
|