Linux Device Drivers

Quick Reference

This section provides a reference for the concepts introduced in this chapter. It also explains the role of each header file that a driver needs to include. The list of fields in the device and sk_buff structures, however, are not repeated here.

#include <linux/netdevice.h>

This header hosts the definition of struct device and includes a few other headers that are needed by network drivers.

void netif_rx(struct sk_buff *skb);

This function can be called at interrupt time to notify the kernel that a packet has been received and encapsulated into a socket buffer.

#include <linux/if.h>

Included by netdevice.h, this file declares the interface flags (IFF_ macros) and struct ifmap, which has a major role in the ioctl implementation for network drivers.

#include <linux/if_ether.h> , ETH_ALEN , ETH_P_IP , struct ethhdr; , struct enet_statistics;

Included by netdevice.h, if_ether.h defines all the ETH_ macros used to represent octet lengths (like the address length) and network protocols (like IP). It also defines the structures ethhdr and enet_statistics. Note that enet_statistics, despite its name and the header in which it is defined, is used by all interfaces, not just Ethernet ones.

#include <linux/skbuff.h>

The definition of struct sk_buff and related structures, as well as several inline functions to act on the buffers. This header is included by netdevice.h.

#include <linux/etherdevice.h> , void ether_setup(struct device *dev);

This function sets most device ...