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-rw-r--r--include/linux/netdevice.h408
1 files changed, 249 insertions, 159 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 55c72a1c7..3f2301ace 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -10,8 +10,8 @@
* 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@super.org>
- * Alan Cox, <A.Cox@swansea.ac.uk>
+ * 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
@@ -28,10 +28,20 @@
#include <linux/if.h>
#include <linux/if_ether.h>
-/* for future expansion when we will have different priorities. */
-#define DEV_NUMBUFFS 3
-#define MAX_ADDR_LEN 7
+#include <asm/atomic.h>
+/*
+ * For future expansion when we will have different priorities.
+ */
+
+#define DEV_NUMBUFFS 3 /* Number of queues per device */
+#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
@@ -55,9 +65,13 @@
#define IS_INVBCAST 4 /* Wrong netmask bcast not for us (unused)*/
#define IS_MULTICAST 5 /* Multicast IP address */
-#ifdef __KERNEL__
+/* NOTE: move to ipv4_device.h */
-#include <linux/skbuff.h>
+#define IFF_IP_ADDR_OK 1
+#define IFF_IP_MASK_OK 2
+#define IFF_IP_BRD_OK 4
+
+struct neighbour;
/*
* We tag multicasts with these structures.
@@ -73,176 +87,236 @@ struct dev_mc_list
struct hh_cache
{
- struct hh_cache *hh_next;
- void *hh_arp; /* Opaque pointer, used by
- * any address resolution module,
- * not only ARP.
- */
- int hh_refcnt; /* number of users */
+ 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 */
- char hh_uptodate; /* hh_data is valid */
- char hh_data[16]; /* cached hardware header */
+ char hh_uptodate; /* hh_data is valid */
+ /* 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.
+ * Network device statistics. Akin to the 2.0 ether stats but
+ * with byte counters.
*/
-struct device
+
+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;
+
+};
- /*
- * 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 char irq; /* device IRQ number */
-
- /* Low-level status flags. */
- volatile unsigned char start, /* start an operation */
- interrupt; /* interrupt arrived */
- unsigned long tbusy; /* transmitter busy must be long for bitops */
-
- struct device *next;
-
- /* The device initialization function. Called only once. */
- int (*init)(struct device *dev);
-
- /* 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 enet_statistics* (*get_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 family; /* address family ID (AF_INET) */
- unsigned short metric; /* routing metric (not used) */
- unsigned short 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 */
-#if 0
- __u32 pa_addr_arr[4];
- __u16 pa_prefix_len;
-#define pa_addr pa_addr_arr[3];
-#else
- unsigned long pa_addr; /* protocol address */
-#endif
- unsigned long pa_brdaddr; /* protocol broadcast addr */
- unsigned long pa_dstaddr; /* protocol P-P other side addr */
- unsigned long pa_mask; /* protocol netmask */
- unsigned short pa_alen; /* protocol address length */
+#ifdef __KERNEL__
+
+#include <linux/skbuff.h>
+
+/*
+ * 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 dev_mc_list *mc_list; /* Multicast mac addresses */
- int mc_count; /* Number of installed mcasts */
+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 char irq; /* device IRQ number */
+
+ /* Low-level status flags. */
+ volatile unsigned char start, /* start an operation */
+ interrupt; /* interrupt arrived */
+ unsigned long tbusy; /* transmitter busy must be
+ long for bitops */
+
+ struct device *next;
+
+ /* The device initialization function. Called only once. */
+ int (*init)(struct device *dev);
+
+ /* Interface index. Unique device identifier */
+ int ifindex;
+ struct device *next_up;
+
+ /*
+ * 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 family; /* address family ID (AF_INET) */
+ unsigned short metric; /* routing metric (not used) */
+ unsigned short 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 */
+ unsigned long pa_addr; /* protocol address */
+
+ unsigned long pa_brdaddr; /* protocol broadcast addr */
+ unsigned long pa_dstaddr; /* protocol P-P other side addr */
+ unsigned long pa_mask; /* protocol netmask */
+ unsigned short pa_alen; /* protocol address length */
+
+ struct dev_mc_list *mc_list; /* Multicast mac addresses */
+ int mc_count; /* Number of installed mcasts */
- struct ip_mc_list *ip_mc_list; /* IP multicast filter chain */
- __u32 tx_queue_len; /* Max frames per queue allowed */
+ struct ip_mc_list *ip_mc_list; /* IP multicast filter chain */
+ unsigned ip_flags; /* IP layer control flags */
+ __u32 tx_queue_len; /* Max frames per queue allowed */
- /* For load balancing driver pair support */
-
- unsigned long pkt_queue; /* Packets queued */
- struct device *slave; /* Slave device */
- struct net_alias_info *alias_info; /* main dev alias info */
- struct net_alias *my_alias; /* alias devs */
+ /* For load balancing driver pair support */
- /* Pointer to the interface buffers. */
- struct sk_buff_head buffs[DEV_NUMBUFFS];
-
- /* 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)(void *eth, struct device *dev,
- unsigned long raddr, struct sk_buff *skb);
+ unsigned long pkt_queue; /* Packets queued */
+ struct device *slave; /* Slave device */
+ struct net_alias_info *alias_info; /* main dev alias info */
+ struct net_alias *my_alias; /* alias devs */
+
+ /* Protocol specific pointers */
+
+ void *atalk_ptr; /* Appletalk link */
+ void *ip_ptr; /* Not used yet */
+
+ /* Pointer to the interface buffers. */
+ struct sk_buff_head buffs[DEV_NUMBUFFS];
+
+ /* 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);
+ void (*set_multicast_list)(struct device *dev);
#define HAVE_SET_MAC_ADDR
- int (*set_mac_address)(struct device *dev, void *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);
+ int (*do_ioctl)(struct device *dev,
+ struct ifreq *ifr, int cmd);
#define HAVE_SET_CONFIG
- int (*set_config)(struct device *dev, struct ifmap *map);
+ int (*set_config)(struct device *dev,
+ struct ifmap *map);
#define HAVE_HEADER_CACHE
- void (*header_cache_bind)(struct hh_cache **hhp, struct device *dev, unsigned short htype, __u32 daddr);
- void (*header_cache_update)(struct hh_cache *hh, struct device *dev, unsigned char * haddr);
+ int (*hard_header_cache)(struct dst_entry *dst,
+ 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 (*change_mtu)(struct device *dev, int new_mtu);
+
};
-struct packet_type {
- unsigned short type; /* This is really htons(ether_type). */
- struct device * dev;
- int (*func) (struct sk_buff *, struct device *,
- struct packet_type *);
- void *data;
- struct packet_type *next;
+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>
-/* Used by dev_rint */
-#define IN_SKBUFF 1
-
-extern volatile unsigned long in_bh;
-
-extern struct device loopback_dev;
-extern struct device *dev_base;
-extern struct packet_type *ptype_base[16];
+extern struct device loopback_dev; /* The loopback */
+extern struct device *dev_base; /* All devices */
+extern struct packet_type *ptype_base[16]; /* Hashed types */
+/* NOTE: move to INET specific header;
+ __ip_chk_addr is deprecated, do not use if it's possible.
+ */
-extern int ip_addr_match(unsigned long addr1, unsigned long addr2);
-extern int ip_chk_addr(unsigned long addr);
-extern struct device *ip_dev_bynet(unsigned long daddr, unsigned long mask);
-extern unsigned long ip_my_addr(void);
-extern unsigned long ip_get_mask(unsigned long addr);
-extern struct device *ip_dev_find(unsigned long addr);
-extern struct device *dev_getbytype(unsigned short type);
+extern int __ip_chk_addr(unsigned long addr);
+extern struct device *ip_dev_find(unsigned long addr, char *name);
+/* This is the wrong place but it'll do for the moment */
+extern void ip_mc_allhost(struct device *dev);
+extern int devinet_ioctl(unsigned int cmd, void *);
+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 void dev_queue_xmit(struct sk_buff *skb, struct device *dev,
- int pri);
+extern int dev_queue_xmit(struct sk_buff *skb);
+extern void dev_loopback_xmit(struct sk_buff *skb);
#define HAVE_NETIF_RX 1
extern void netif_rx(struct sk_buff *skb);
@@ -255,61 +329,77 @@ extern void dev_init(void);
/* Locking protection for page faults during outputs to devices unloaded during the fault */
-extern int dev_lockct;
+extern atomic_t dev_lockct;
/*
- * These two don't currently need to be interrupt-safe
+ * 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)
{
- unsigned long flags;
- save_flags(flags);
- cli();
- dev_lockct++;
- restore_flags(flags);
+ atomic_inc(&dev_lockct);
}
extern __inline__ void dev_unlock_list(void)
{
- unsigned long flags;
- save_flags(flags);
- cli();
- dev_lockct--;
- restore_flags(flags);
+ atomic_dec(&dev_lockct);
}
/*
* This almost never occurs, isn't in performance critical paths
- * and we can thus be relaxed about it
+ * 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 ?
*/
extern __inline__ void dev_lock_wait(void)
{
- while(dev_lockct)
+ while(atomic_read(&dev_lockct))
schedule();
}
+/*
+ * Buffer initialisation function. This used to appear in all the
+ * drivers but is now an inline in case we ever want to change the
+ * schemes used.
+ */
+
+extern __inline__ void dev_init_buffers(struct device *dev)
+{
+ int i;
+ for(i=0;i<DEV_NUMBUFFS;i++)
+ {
+ skb_queue_head_init(&dev->buffs[i]);
+ }
+}
+
/* 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_netdevice_notifier(struct notifier_block *nb);
extern int unregister_netdevice_notifier(struct notifier_block *nb);
+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 void dev_mc_delete(struct device *dev, void *addr, int alen, int all);
extern void dev_mc_add(struct device *dev, void *addr, int alen, int newonly);
extern void dev_mc_discard(struct device *dev);
-/* This is the wrong place but it'll do for the moment */
-extern void ip_mc_allhost(struct device *dev);
+/* Load a device via the kerneld */
+extern void dev_load(const char *name);
+extern int dev_new_index(void);
+extern struct device * dev_get_by_index(int ifindex);
+
#endif /* __KERNEL__ */
#endif /* _LINUX_DEV_H */
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