/* * 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, * Fred N. van Kempen, * Corey Minyard * Donald J. Becker, * Alan Cox, * Bjorn Ekwall. * * 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 #include #include #include #include #ifdef __KERNEL__ #ifdef CONFIG_NET_PROFILE #include #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 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 #include 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 */