/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* Definitions for the Interfaces handler.
*
* Version: @(#)dev.h 1.0.10 08/12/93
*
* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Corey Minyard <wf-rch!minyard@relay.EU.net>
* Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
* Alan Cox, <Alan.Cox@linux.org>
* Bjorn Ekwall. <bj0rn@blox.se>
*
* 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.
*
* Moved to /usr/include/linux for NET3
*/
#ifndef _LINUX_NETDEVICE_H
#define _LINUX_NETDEVICE_H
#ifdef __KERNEL__
#include <linux/config.h>
#endif
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <asm/atomic.h>
#ifdef __KERNEL__
#ifdef CONFIG_NET_PROFILE
#include <net/profile.h>
#endif
#endif
/*
* For future expansion when we will have different priorities.
*/
#define MAX_ADDR_LEN 7 /* Largest hardware address length */
/*
* Compute the worst case header length according to the protocols
* used.
*/
#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
#define LL_MAX_HEADER 32
#else
#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
#define LL_MAX_HEADER 96
#else
#define LL_MAX_HEADER 48
#endif
#endif
#if !defined(CONFIG_NET_IPIP) && \
!defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
#define MAX_HEADER LL_MAX_HEADER
#else
#define MAX_HEADER (LL_MAX_HEADER + 48)
#endif
/*
* Network device statistics. Akin to the 2.0 ether stats but
* with byte counters.
*/
struct net_device_stats
{
unsigned long rx_packets; /* total packets received */
unsigned long tx_packets; /* total packets transmitted */
unsigned long rx_bytes; /* total bytes received */
unsigned long tx_bytes; /* total bytes transmitted */
unsigned long rx_errors; /* bad packets received */
unsigned long tx_errors; /* packet transmit problems */
unsigned long rx_dropped; /* no space in linux buffers */
unsigned long tx_dropped; /* no space available in linux */
unsigned long multicast; /* multicast packets received */
unsigned long collisions;
/* detailed rx_errors: */
unsigned long rx_length_errors;
unsigned long rx_over_errors; /* receiver ring buff overflow */
unsigned long rx_crc_errors; /* recved pkt with crc error */
unsigned long rx_frame_errors; /* recv'd frame alignment error */
unsigned long rx_fifo_errors; /* recv'r fifo overrun */
unsigned long rx_missed_errors; /* receiver missed packet */
/* detailed tx_errors */
unsigned long tx_aborted_errors;
unsigned long tx_carrier_errors;
unsigned long tx_fifo_errors;
unsigned long tx_heartbeat_errors;
unsigned long tx_window_errors;
/* for cslip etc */
unsigned long rx_compressed;
unsigned long tx_compressed;
};
#ifdef CONFIG_NET_FASTROUTE
struct net_fastroute_stats
{
int hits;
int succeed;
int deferred;
int latency_reduction;
};
#endif
/* Media selection options. */
enum {
IF_PORT_UNKNOWN = 0,
IF_PORT_10BASE2,
IF_PORT_10BASET,
IF_PORT_AUI,
IF_PORT_100BASET,
IF_PORT_100BASETX,
IF_PORT_100BASEFX
};
#ifdef __KERNEL__
extern const char *if_port_text[];
#include <linux/skbuff.h>
struct neighbour;
struct neigh_parms;
struct sk_buff;
/*
* We tag multicasts with these structures.
*/
struct dev_mc_list
{
struct dev_mc_list *next;
__u8 dmi_addr[MAX_ADDR_LEN];
unsigned char dmi_addrlen;
int dmi_users;
int dmi_gusers;
};
struct hh_cache
{
struct hh_cache *hh_next; /* Next entry */
atomic_t hh_refcnt; /* number of users */
unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP */
int (*hh_output)(struct sk_buff *skb);
rwlock_t hh_lock;
/* cached hardware header; allow for machine alignment needs. */
unsigned long hh_data[16/sizeof(unsigned long)];
};
/*
* The DEVICE structure.
* Actually, this whole structure is a big mistake. It mixes I/O
* data with strictly "high-level" data, and it has to know about
* almost every data structure used in the INET module.
*
* FIXME: cleanup struct device such that network protocol info
* moves out.
*/
struct device
{
/*
* This is the first field of the "visible" part of this structure
* (i.e. as seen by users in the "Space.c" file). It is the name
* the interface.
*/
char *name;
/*
* I/O specific fields
* FIXME: Merge these and struct ifmap into one
*/
unsigned long rmem_end; /* shmem "recv" end */
unsigned long rmem_start; /* shmem "recv" start */
unsigned long mem_end; /* shared mem end */
unsigned long mem_start; /* shared mem start */
unsigned long base_addr; /* device I/O address */
unsigned int irq; /* device IRQ number */
/* Low-level status flags. */
volatile unsigned char start; /* start an operation */
/*
* These two are just single-bit flags, but due to atomicity
* reasons they have to be inside a "unsigned long". However,
* they should be inside the SAME unsigned long instead of
* this wasteful use of memory..
*/
unsigned long interrupt; /* bitops.. */
unsigned long tbusy; /* transmitter busy */
struct device *next;
/* The device initialization function. Called only once. */
int (*init)(struct device *dev);
void (*destructor)(struct device *dev);
/* Interface index. Unique device identifier */
int ifindex;
int iflink;
/*
* Some hardware also needs these fields, but they are not
* part of the usual set specified in Space.c.
*/
unsigned char if_port; /* Selectable AUI, TP,..*/
unsigned char dma; /* DMA channel */
struct net_device_stats* (*get_stats)(struct device *dev);
struct iw_statistics* (*get_wireless_stats)(struct device *dev);
/*
* This marks the end of the "visible" part of the structure. All
* fields hereafter are internal to the system, and may change at
* will (read: may be cleaned up at will).
*/
/* These may be needed for future network-power-down code. */
unsigned long trans_start; /* Time (in jiffies) of last Tx */
unsigned long last_rx; /* Time of last Rx */
unsigned short flags; /* interface flags (a la BSD) */
unsigned short gflags;
unsigned mtu; /* interface MTU value */
unsigned short type; /* interface hardware type */
unsigned short hard_header_len; /* hardware hdr length */
void *priv; /* pointer to private data */
/* Interface address info. */
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
unsigned char pad; /* make dev_addr aligned to 8 bytes */
unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
unsigned char addr_len; /* hardware address length */
struct dev_mc_list *mc_list; /* Multicast mac addresses */
int mc_count; /* Number of installed mcasts */
int promiscuity;
int allmulti;
/* For load balancing driver pair support */
unsigned long pkt_queue; /* Packets queued */
struct device *slave; /* Slave device */
/* Protocol specific pointers */
void *atalk_ptr; /* AppleTalk link */
void *ip_ptr; /* IPv4 specific data */
void *dn_ptr; /* DECnet specific data */
struct Qdisc *qdisc;
struct Qdisc *qdisc_sleeping;
struct Qdisc *qdisc_list;
unsigned long tx_queue_len; /* Max frames per queue allowed */
/* Bridge stuff */
int bridge_port_id;
/* Pointers to interface service routines. */
int (*open)(struct device *dev);
int (*stop)(struct device *dev);
int (*hard_start_xmit) (struct sk_buff *skb,
struct device *dev);
int (*hard_header) (struct sk_buff *skb,
struct device *dev,
unsigned short type,
void *daddr,
void *saddr,
unsigned len);
int (*rebuild_header)(struct sk_buff *skb);
#define HAVE_MULTICAST
void (*set_multicast_list)(struct device *dev);
#define HAVE_SET_MAC_ADDR
int (*set_mac_address)(struct device *dev,
void *addr);
#define HAVE_PRIVATE_IOCTL
int (*do_ioctl)(struct device *dev,
struct ifreq *ifr, int cmd);
#define HAVE_SET_CONFIG
int (*set_config)(struct device *dev,
struct ifmap *map);
#define HAVE_HEADER_CACHE
int (*hard_header_cache)(struct neighbour *neigh,
struct hh_cache *hh);
void (*header_cache_update)(struct hh_cache *hh,
struct device *dev,
unsigned char * haddr);
#define HAVE_CHANGE_MTU
int (*change_mtu)(struct device *dev, int new_mtu);
int (*hard_header_parse)(struct sk_buff *skb,
unsigned char *haddr);
int (*neigh_setup)(struct device *dev, struct neigh_parms *);
int (*accept_fastpath)(struct device *, struct dst_entry*);
#ifdef CONFIG_NET_FASTROUTE
/* Really, this semaphore may be necessary and for not fastroute code;
f.e. SMP??
*/
int tx_semaphore;
#define NETDEV_FASTROUTE_HMASK 0xF
/* Semi-private data. Keep it at the end of device struct. */
struct dst_entry *fastpath[NETDEV_FASTROUTE_HMASK+1];
#endif
int (*change_flags)(struct device *dev, short flags);
};
struct packet_type
{
unsigned short type; /* This is really htons(ether_type). */
struct device *dev; /* NULL is wildcarded here */
int (*func) (struct sk_buff *, struct device *,
struct packet_type *);
void *data; /* Private to the packet type */
struct packet_type *next;
};
#include <linux/interrupt.h>
#include <linux/notifier.h>
extern struct device loopback_dev; /* The loopback */
extern struct device *dev_base; /* All devices */
extern struct packet_type *ptype_base[16]; /* Hashed types */
extern int netdev_dropping;
extern int net_cpu_congestion;
extern struct device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
extern void dev_add_pack(struct packet_type *pt);
extern void dev_remove_pack(struct packet_type *pt);
extern struct device *dev_get(const char *name);
extern struct device *dev_alloc(const char *name, int *err);
extern int dev_alloc_name(struct device *dev, const char *name);
extern int dev_open(struct device *dev);
extern int dev_close(struct device *dev);
extern int dev_queue_xmit(struct sk_buff *skb);
extern void dev_loopback_xmit(struct sk_buff *skb);
extern int register_netdevice(struct device *dev);
extern int unregister_netdevice(struct device *dev);
extern int register_netdevice_notifier(struct notifier_block *nb);
extern int unregister_netdevice_notifier(struct notifier_block *nb);
extern int dev_new_index(void);
extern struct device *dev_get_by_index(int ifindex);
extern int dev_restart(struct device *dev);
typedef int gifconf_func_t(struct device * dev, char * bufptr, int len);
extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
extern __inline__ int unregister_gifconf(unsigned int family)
{
return register_gifconf(family, 0);
}
#define HAVE_NETIF_RX 1
extern void netif_rx(struct sk_buff *skb);
extern void net_bh(void);
extern int dev_get_info(char *buffer, char **start, off_t offset, int length, int dummy);
extern int dev_ioctl(unsigned int cmd, void *);
extern int dev_change_flags(struct device *, unsigned);
extern void dev_queue_xmit_nit(struct sk_buff *skb, struct device *dev);
extern void dev_init(void);
extern int netdev_nit;
/* Locking protection for page faults during outputs to devices unloaded during the fault */
extern atomic_t dev_lockct;
/*
* These two don't currently need to be atomic
* but they may do soon. Do it properly anyway.
*/
extern __inline__ void dev_lock_list(void)
{
atomic_inc(&dev_lockct);
}
extern __inline__ void dev_unlock_list(void)
{
atomic_dec(&dev_lockct);
}
/*
* This almost never occurs, isn't in performance critical paths
* and we can thus be relaxed about it.
*
* FIXME: What if this is being run as a real time process ??
* Linus: We need a way to force a yield here ?
*
* FIXME: Though dev_lockct is atomic varible, locking procedure
* is not atomic.
*/
extern __inline__ void dev_lock_wait(void)
{
while (atomic_read(&dev_lockct)) {
current->policy |= SCHED_YIELD;
schedule();
}
}
extern __inline__ void dev_init_buffers(struct device *dev)
{
/* DO NOTHING */
}
/* These functions live elsewhere (drivers/net/net_init.c, but related) */
extern void ether_setup(struct device *dev);
extern void fddi_setup(struct device *dev);
extern void tr_setup(struct device *dev);
extern void fc_setup(struct device *dev);
extern void tr_freedev(struct device *dev);
extern void fc_freedev(struct device *dev);
extern int ether_config(struct device *dev, struct ifmap *map);
/* Support for loadable net-drivers */
extern int register_netdev(struct device *dev);
extern void unregister_netdev(struct device *dev);
extern int register_trdev(struct device *dev);
extern void unregister_trdev(struct device *dev);
extern int register_fcdev(struct device *dev);
extern void unregister_fcdev(struct device *dev);
/* Functions used for multicast support */
extern void dev_mc_upload(struct device *dev);
extern int dev_mc_delete(struct device *dev, void *addr, int alen, int all);
extern int dev_mc_add(struct device *dev, void *addr, int alen, int newonly);
extern void dev_mc_discard(struct device *dev);
extern void dev_set_promiscuity(struct device *dev, int inc);
extern void dev_set_allmulti(struct device *dev, int inc);
extern void netdev_state_change(struct device *dev);
/* Load a device via the kmod */
extern void dev_load(const char *name);
extern void dev_mcast_init(void);
extern int netdev_register_fc(struct device *dev, void (*stimul)(struct device *dev));
extern void netdev_unregister_fc(int bit);
extern int netdev_dropping;
extern int netdev_max_backlog;
extern atomic_t netdev_rx_dropped;
extern unsigned long netdev_fc_xoff;
#ifdef CONFIG_NET_FASTROUTE
extern int netdev_fastroute;
extern int netdev_fastroute_obstacles;
extern void dev_clear_fastroute(struct device *dev);
extern struct net_fastroute_stats dev_fastroute_stat;
#endif
#endif /* __KERNEL__ */
#endif /* _LINUX_DEV_H */