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- /*
- * 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
-
- #include <linux/config.h>
- #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 */
-
- /* 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
- };
-
-
- 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->counter = 0;
- 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 tr_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);
- /* 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 */
-