#ifndef __LINUX_NETDEVICE_WRAPPER_H
#define __LINUX_NETDEVICE_WRAPPER_H 1

#include_next <linux/netdevice.h>

struct net;

#include <linux/version.h>
/* Before 2.6.21, struct net_device has a "struct class_device" member named
 * class_dev.  Beginning with 2.6.21, struct net_device instead has a "struct
 * device" member named dev.  Otherwise the usage of these members is pretty
 * much the same. */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
#define NETDEV_DEV_MEMBER class_dev
#else
#define NETDEV_DEV_MEMBER dev
#endif

#ifndef to_net_dev
#define to_net_dev(class) container_of(class, struct net_device, NETDEV_DEV_MEMBER)
#endif

#ifdef HAVE_RHEL_OVS_HOOK
extern struct sk_buff *(*openvswitch_handle_frame_hook)(struct sk_buff *skb);
extern int nr_bridges;
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
static inline
struct net *dev_net(const struct net_device *dev)
{
#ifdef CONFIG_NET_NS
	return dev->nd_net;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
	return &init_net;
#else
	return NULL;
#endif
}

static inline
void dev_net_set(struct net_device *dev, const struct net *net)
{
#ifdef CONFIG_NET_NS
	dev->nd_dev = net;
#endif
}
#endif /* linux kernel < 2.6.26 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
#define NETIF_F_NETNS_LOCAL 0
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
#define proc_net init_net.proc_net
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
typedef int netdev_tx_t;
#endif

#ifndef for_each_netdev
/* Linux before 2.6.22 didn't have for_each_netdev at all. */
#define for_each_netdev(net, d) for (d = dev_base; d; d = d->next)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
/* Linux 2.6.24 added a network namespace pointer to the macro. */
#undef for_each_netdev
#define for_each_netdev(net, d) list_for_each_entry(d, &dev_base_head, dev_list)
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
#define net_xmit_eval(e)       ((e) == NET_XMIT_CN ? 0 : (e))
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
extern void unregister_netdevice_queue(struct net_device *dev,
					struct list_head *head);
extern void unregister_netdevice_many(struct list_head *head);
#endif

#ifndef HAVE_DEV_DISABLE_LRO
extern void dev_disable_lro(struct net_device *dev);
#endif

#define skb_checksum_help rpl_skb_checksum_help
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
extern int skb_checksum_help(struct sk_buff *skb, int);
#else
extern int skb_checksum_help(struct sk_buff *skb);
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36) || \
    defined HAVE_RHEL_OVS_HOOK
static inline int netdev_rx_handler_register(struct net_device *dev,
					     void *rx_handler,
					     void *rx_handler_data)
{
#ifdef HAVE_RHEL_OVS_HOOK
	rcu_assign_pointer(dev->ax25_ptr, rx_handler_data);
	nr_bridges++;
	rcu_assign_pointer(openvswitch_handle_frame_hook, rx_handler_data);
#else
	if (dev->br_port)
		return -EBUSY;
	rcu_assign_pointer(dev->br_port, rx_handler_data);
#endif
	return 0;
}
static inline void netdev_rx_handler_unregister(struct net_device *dev)
{
#ifdef HAVE_RHEL_OVS_HOOK
	rcu_assign_pointer(dev->ax25_ptr, NULL);

	if (--nr_bridges <= 0)
		rcu_assign_pointer(openvswitch_handle_frame_hook, NULL);
#else
	rcu_assign_pointer(dev->br_port, NULL);
#endif
}
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
#undef SET_ETHTOOL_OPS
#define SET_ETHTOOL_OPS(netdev, ops) \
	((netdev)->ethtool_ops = (struct ethtool_ops *)(ops))
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
#define dev_get_by_name(net, name) dev_get_by_name(name)
#define dev_get_by_index(net, ifindex) dev_get_by_index(ifindex)
#define __dev_get_by_name(net, name) __dev_get_by_name(name)
#define __dev_get_by_index(net, ifindex) __dev_get_by_index(ifindex)
#define dev_get_by_index_rcu(net, ifindex) dev_get_by_index_rcu(ifindex)
#endif

#ifndef HAVE_DEV_GET_BY_INDEX_RCU
static inline struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex)
{
	struct net_device *dev;

	read_lock(&dev_base_lock);
	dev = __dev_get_by_index(net, ifindex);
	read_unlock(&dev_base_lock);

	return dev;
}
#endif

#ifndef NETIF_F_FSO
#define NETIF_F_FSO 0
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
#define NETIF_F_FCOE_CRC	(1 << 24) /* FCoE CRC32 */
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
#define NETIF_F_IPV6_CSUM	16      /* Can checksum TCP/UDP over IPV6 */

#define NETIF_F_V4_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
#define NETIF_F_V6_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
#define skb_gso_segment rpl_skb_gso_segment
struct sk_buff *rpl_skb_gso_segment(struct sk_buff *skb, u32 features);

#define netif_skb_features rpl_netif_skb_features
u32 rpl_netif_skb_features(struct sk_buff *skb);

#define netif_needs_gso rpl_netif_needs_gso
static inline int rpl_netif_needs_gso(struct sk_buff *skb, int features)
{
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
		unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
}
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0)
typedef u32 netdev_features_t;
#endif

#ifndef HAVE___SKB_GSO_SEGMENT
static inline struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
						netdev_features_t features,
						bool tx_path)
{
	return skb_gso_segment(skb, features);
}
#endif
#endif