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TOMOYO Linux Cross Reference
Linux/include/linux/netpoll.h

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  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/rcupdate.h>
 13 #include <linux/list.h>
 14 
 15 union inet_addr {
 16         __u32           all[4];
 17         __be32          ip;
 18         __be32          ip6[4];
 19         struct in_addr  in;
 20         struct in6_addr in6;
 21 };
 22 
 23 struct netpoll {
 24         struct net_device *dev;
 25         char dev_name[IFNAMSIZ];
 26         const char *name;
 27 
 28         union inet_addr local_ip, remote_ip;
 29         bool ipv6;
 30         u16 local_port, remote_port;
 31         u8 remote_mac[ETH_ALEN];
 32 
 33         struct work_struct cleanup_work;
 34 };
 35 
 36 struct netpoll_info {
 37         atomic_t refcnt;
 38 
 39         struct semaphore dev_lock;
 40 
 41         struct sk_buff_head txq;
 42 
 43         struct delayed_work tx_work;
 44 
 45         struct netpoll *netpoll;
 46         struct rcu_head rcu;
 47 };
 48 
 49 #ifdef CONFIG_NETPOLL
 50 extern void netpoll_poll_disable(struct net_device *dev);
 51 extern void netpoll_poll_enable(struct net_device *dev);
 52 #else
 53 static inline void netpoll_poll_disable(struct net_device *dev) { return; }
 54 static inline void netpoll_poll_enable(struct net_device *dev) { return; }
 55 #endif
 56 
 57 void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
 58 void netpoll_print_options(struct netpoll *np);
 59 int netpoll_parse_options(struct netpoll *np, char *opt);
 60 int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
 61 int netpoll_setup(struct netpoll *np);
 62 void __netpoll_cleanup(struct netpoll *np);
 63 void __netpoll_free_async(struct netpoll *np);
 64 void netpoll_cleanup(struct netpoll *np);
 65 void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
 66                              struct net_device *dev);
 67 static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 68 {
 69         unsigned long flags;
 70         local_irq_save(flags);
 71         netpoll_send_skb_on_dev(np, skb, np->dev);
 72         local_irq_restore(flags);
 73 }
 74 
 75 #ifdef CONFIG_NETPOLL
 76 static inline void *netpoll_poll_lock(struct napi_struct *napi)
 77 {
 78         struct net_device *dev = napi->dev;
 79 
 80         if (dev && dev->npinfo) {
 81                 spin_lock(&napi->poll_lock);
 82                 napi->poll_owner = smp_processor_id();
 83                 return napi;
 84         }
 85         return NULL;
 86 }
 87 
 88 static inline void netpoll_poll_unlock(void *have)
 89 {
 90         struct napi_struct *napi = have;
 91 
 92         if (napi) {
 93                 napi->poll_owner = -1;
 94                 spin_unlock(&napi->poll_lock);
 95         }
 96 }
 97 
 98 static inline bool netpoll_tx_running(struct net_device *dev)
 99 {
100         return irqs_disabled();
101 }
102 
103 #else
104 static inline void *netpoll_poll_lock(struct napi_struct *napi)
105 {
106         return NULL;
107 }
108 static inline void netpoll_poll_unlock(void *have)
109 {
110 }
111 static inline void netpoll_netdev_init(struct net_device *dev)
112 {
113 }
114 static inline bool netpoll_tx_running(struct net_device *dev)
115 {
116         return false;
117 }
118 #endif
119 
120 #endif
121 

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