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 68