Edit File: netpoll.h
/* * Common code for low-level network console, dump, and debugger code * * Derived from netconsole, kgdb-over-ethernet, and netdump patches */ #ifndef _LINUX_NETPOLL_H #define _LINUX_NETPOLL_H #include <linux/netdevice.h> #include <linux/interrupt.h> #include <linux/rcupdate.h> #include <linux/list.h> union inet_addr { __u32 all[4]; __be32 ip; __be32 ip6[4]; struct in_addr in; struct in6_addr in6; }; struct netpoll { struct net_device *dev; char dev_name[IFNAMSIZ]; const char *name; void (*rx_hook)(struct netpoll *, int, char *, int); union inet_addr local_ip, remote_ip; bool ipv6; u16 local_port, remote_port; u8 remote_mac[ETH_ALEN]; struct list_head rx; /* rx_np list element */ struct work_struct cleanup_work; }; struct netpoll_info { atomic_t refcnt; unsigned long rx_flags; spinlock_t rx_lock; struct semaphore dev_lock; struct list_head rx_np; /* netpolls that registered an rx_hook */ struct sk_buff_head neigh_tx; /* list of neigh requests to reply to */ struct sk_buff_head txq; struct delayed_work tx_work; struct netpoll *netpoll; struct rcu_head rcu; }; #ifdef CONFIG_NETPOLL void netpoll_poll_dev(struct net_device *dev); void netpoll_poll_disable(struct net_device *dev); void netpoll_poll_enable(struct net_device *dev); #else static inline void netpoll_poll_disable(struct net_device *dev) { return; } static inline void netpoll_poll_enable(struct net_device *dev) { return; } #endif void netpoll_send_udp(struct netpoll *np, const char *msg, int len); void netpoll_print_options(struct netpoll *np); int netpoll_parse_options(struct netpoll *np, char *opt); int __netpoll_setup(struct netpoll *np, struct net_device *ndev); int netpoll_setup(struct netpoll *np); void __netpoll_cleanup(struct netpoll *np); void __netpoll_free_async(struct netpoll *np); void netpoll_cleanup(struct netpoll *np); void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb, struct net_device *dev); static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb) { unsigned long flags; local_irq_save(flags); netpoll_send_skb_on_dev(np, skb, np->dev); local_irq_restore(flags); } #ifdef CONFIG_NETPOLL static inline void *netpoll_poll_lock(struct napi_struct *napi) { struct net_device *dev = napi->dev; if (dev && dev->npinfo) { int owner = smp_processor_id(); while (cmpxchg(&napi->poll_owner, -1, owner) != -1) cpu_relax(); return napi; } return NULL; } static inline void netpoll_poll_unlock(void *have) { struct napi_struct *napi = have; if (napi) smp_store_release(&napi->poll_owner, -1); } static inline bool netpoll_tx_running(struct net_device *dev) { return irqs_disabled(); } #else static inline void *netpoll_poll_lock(struct napi_struct *napi) { return NULL; } static inline void netpoll_poll_unlock(void *have) { } static inline void netpoll_netdev_init(struct net_device *dev) { } static inline bool netpoll_tx_running(struct net_device *dev) { return false; } #endif #endif