include/linux/netpoll.h

   1 /*
   2  * Common code for low-level network console, dump, and debugger code
   3  *
   4  * Derived from netconsole, kgdb-over-ethernet, and netdump patches
   5  */
   6
   7 #ifndef _LINUX_NETPOLL_H
   8 #define _LINUX_NETPOLL_H
   9
  10 #include <linux/netdevice.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/list.h>
  13
  14 struct netpoll;
  15
  16 struct netpoll {
  17         struct net_device *dev;
  18         char dev_name[16], *name;
  19         int rx_flags;
  20         void (*rx_hook)(struct netpoll *, int, char *, int);
  21         void (*drop)(struct sk_buff *skb);
  22         u32 local_ip, remote_ip;
  23         u16 local_port, remote_port;
  24         unsigned char local_mac[6], remote_mac[6];
  25         spinlock_t poll_lock;
  26         int poll_owner;
  27 };
  28
  29 void netpoll_poll(struct netpoll *np);
  30 void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
  31 int netpoll_parse_options(struct netpoll *np, char *opt);
  32 int netpoll_setup(struct netpoll *np);
  33 int netpoll_trap(void);
  34 void netpoll_set_trap(int trap);
  35 void netpoll_cleanup(struct netpoll *np);
  36 int __netpoll_rx(struct sk_buff *skb);
  37 void netpoll_queue(struct sk_buff *skb);
  38
  39 #ifdef CONFIG_NETPOLL
  40 static inline int netpoll_rx(struct sk_buff *skb)
  41 {
  42         return skb->dev->np && skb->dev->np->rx_flags && __netpoll_rx(skb);
  43 }
  44
  45 static inline void netpoll_poll_lock(struct net_device *dev)
  46 {
  47         if (dev->np) {
  48                 spin_lock(&dev->np->poll_lock);
  49                 dev->np->poll_owner = smp_processor_id();
  50         }
  51 }
  52
  53 static inline void netpoll_poll_unlock(struct net_device *dev)
  54 {
  55         if (dev->np) {
  56                 spin_unlock(&dev->np->poll_lock);
  57                 dev->np->poll_owner = -1;
  58         }
  59 }
  60
  61 #else
  62 #define netpoll_rx(a) 0
  63 #define netpoll_poll_lock(a)
  64 #define netpoll_poll_unlock(a)
  65 #endif
  66
  67 #endif