2 * Common code for low-level network console, dump, and debugger code
4 * Derived from netconsole, kgdb-over-ethernet, and netdump patches
7 #ifndef _LINUX_NETPOLL_H
8 #define _LINUX_NETPOLL_H
10 #include <linux/netdevice.h>
11 #include <linux/interrupt.h>
12 #include <linux/rcupdate.h>
13 #include <linux/list.h>
18 struct net_device *dev;
19 char dev_name[16], *name;
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];
33 struct netpoll *rx_np; /* netpoll that registered an rx_hook */
34 struct sk_buff_head arp_tx; /* list of arp requests to reply to */
35 struct sk_buff_head txq;
36 struct work_struct tx_work;
39 void netpoll_poll(struct netpoll *np);
40 void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
41 int netpoll_parse_options(struct netpoll *np, char *opt);
42 int netpoll_setup(struct netpoll *np);
43 int netpoll_trap(void);
44 void netpoll_set_trap(int trap);
45 void netpoll_cleanup(struct netpoll *np);
46 int __netpoll_rx(struct sk_buff *skb);
47 void netpoll_queue(struct sk_buff *skb);
50 static inline int netpoll_rx(struct sk_buff *skb)
52 struct netpoll_info *npinfo = skb->dev->npinfo;
56 if (!npinfo || (!npinfo->rx_np && !npinfo->rx_flags))
59 spin_lock_irqsave(&npinfo->rx_lock, flags);
60 /* check rx_flags again with the lock held */
61 if (npinfo->rx_flags && __netpoll_rx(skb))
63 spin_unlock_irqrestore(&npinfo->rx_lock, flags);
68 static inline void *netpoll_poll_lock(struct net_device *dev)
70 rcu_read_lock(); /* deal with race on ->npinfo */
72 spin_lock(&dev->npinfo->poll_lock);
73 dev->npinfo->poll_owner = smp_processor_id();
79 static inline void netpoll_poll_unlock(void *have)
81 struct netpoll_info *npi = have;
85 spin_unlock(&npi->poll_lock);
91 #define netpoll_rx(a) 0
92 #define netpoll_poll_lock(a) NULL
93 #define netpoll_poll_unlock(a)