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>
16 struct net_device
*dev
;
17 char dev_name
[IFNAMSIZ
];
19 void (*rx_hook
)(struct netpoll
*, int, char *, int);
21 u32 local_ip
, remote_ip
;
22 u16 local_port
, remote_port
;
23 u8 local_mac
[ETH_ALEN
], remote_mac
[ETH_ALEN
];
32 struct netpoll
*rx_np
; /* netpoll that registered an rx_hook */
33 struct sk_buff_head arp_tx
; /* list of arp requests to reply to */
34 struct sk_buff_head txq
;
35 struct delayed_work tx_work
;
38 void netpoll_poll(struct netpoll
*np
);
39 void netpoll_send_udp(struct netpoll
*np
, const char *msg
, int len
);
40 int netpoll_parse_options(struct netpoll
*np
, char *opt
);
41 int netpoll_setup(struct netpoll
*np
);
42 int netpoll_trap(void);
43 void netpoll_set_trap(int trap
);
44 void netpoll_cleanup(struct netpoll
*np
);
45 int __netpoll_rx(struct sk_buff
*skb
);
49 static inline int netpoll_rx(struct sk_buff
*skb
)
51 struct netpoll_info
*npinfo
= skb
->dev
->npinfo
;
55 if (!npinfo
|| (!npinfo
->rx_np
&& !npinfo
->rx_flags
))
58 spin_lock_irqsave(&npinfo
->rx_lock
, flags
);
59 /* check rx_flags again with the lock held */
60 if (npinfo
->rx_flags
&& __netpoll_rx(skb
))
62 spin_unlock_irqrestore(&npinfo
->rx_lock
, flags
);
67 static inline void *netpoll_poll_lock(struct net_device
*dev
)
69 rcu_read_lock(); /* deal with race on ->npinfo */
71 spin_lock(&dev
->npinfo
->poll_lock
);
72 dev
->npinfo
->poll_owner
= smp_processor_id();
78 static inline void netpoll_poll_unlock(void *have
)
80 struct netpoll_info
*npi
= have
;
84 spin_unlock(&npi
->poll_lock
);
90 #define netpoll_rx(a) 0
91 #define netpoll_poll_lock(a) NULL
92 #define netpoll_poll_unlock(a)