diff options
Diffstat (limited to 'kernel/include/linux/netpoll.h')
| -rw-r--r-- | kernel/include/linux/netpoll.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/kernel/include/linux/netpoll.h b/kernel/include/linux/netpoll.h new file mode 100644 index 000000000..b25ee9ffd --- /dev/null +++ b/kernel/include/linux/netpoll.h @@ -0,0 +1,120 @@ +/* + * 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; + + union inet_addr local_ip, remote_ip; + bool ipv6; + u16 local_port, remote_port; + u8 remote_mac[ETH_ALEN]; + + struct work_struct cleanup_work; +}; + +struct netpoll_info { + atomic_t refcnt; + + struct semaphore dev_lock; + + struct sk_buff_head txq; + + struct delayed_work tx_work; + + struct netpoll *netpoll; + struct rcu_head rcu; +}; + +#ifdef CONFIG_NETPOLL +extern void netpoll_poll_disable(struct net_device *dev); +extern 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) { + spin_lock(&napi->poll_lock); + napi->poll_owner = smp_processor_id(); + return napi; + } + return NULL; +} + +static inline void netpoll_poll_unlock(void *have) +{ + struct napi_struct *napi = have; + + if (napi) { + napi->poll_owner = -1; + spin_unlock(&napi->poll_lock); + } +} + +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 |