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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/netpoll.h
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 __be32 local_ip
, remote_ip
;
22 u16 local_port
, remote_port
;
23 u8 remote_mac
[ETH_ALEN
];
25 struct list_head rx
; /* rx_np list element */
33 struct list_head rx_np
; /* netpolls that registered an rx_hook */
35 struct sk_buff_head arp_tx
; /* list of arp requests to reply to */
36 struct sk_buff_head txq
;
38 struct delayed_work tx_work
;
41 void netpoll_poll(struct netpoll
*np
);
42 void netpoll_send_udp(struct netpoll
*np
, const char *msg
, int len
);
43 void netpoll_print_options(struct netpoll
*np
);
44 int netpoll_parse_options(struct netpoll
*np
, char *opt
);
45 int netpoll_setup(struct netpoll
*np
);
46 int netpoll_trap(void);
47 void netpoll_set_trap(int trap
);
48 void netpoll_cleanup(struct netpoll
*np
);
49 int __netpoll_rx(struct sk_buff
*skb
);
53 static inline int netpoll_rx(struct sk_buff
*skb
)
55 struct netpoll_info
*npinfo
= skb
->dev
->npinfo
;
59 if (!npinfo
|| (list_empty(&npinfo
->rx_np
) && !npinfo
->rx_flags
))
62 spin_lock_irqsave(&npinfo
->rx_lock
, flags
);
63 /* check rx_flags again with the lock held */
64 if (npinfo
->rx_flags
&& __netpoll_rx(skb
))
66 spin_unlock_irqrestore(&npinfo
->rx_lock
, flags
);
71 static inline int netpoll_rx_on(struct sk_buff
*skb
)
73 struct netpoll_info
*npinfo
= skb
->dev
->npinfo
;
75 return npinfo
&& (!list_empty(&npinfo
->rx_np
) || npinfo
->rx_flags
);
78 static inline int netpoll_receive_skb(struct sk_buff
*skb
)
80 if (!list_empty(&skb
->dev
->napi_list
))
81 return netpoll_rx(skb
);
85 static inline void *netpoll_poll_lock(struct napi_struct
*napi
)
87 struct net_device
*dev
= napi
->dev
;
89 rcu_read_lock(); /* deal with race on ->npinfo */
90 if (dev
&& dev
->npinfo
) {
91 spin_lock(&napi
->poll_lock
);
92 napi
->poll_owner
= smp_processor_id();
98 static inline void netpoll_poll_unlock(void *have
)
100 struct napi_struct
*napi
= have
;
103 napi
->poll_owner
= -1;
104 spin_unlock(&napi
->poll_lock
);
110 static inline int netpoll_rx(struct sk_buff
*skb
)
114 static inline int netpoll_rx_on(struct sk_buff
*skb
)
118 static inline int netpoll_receive_skb(struct sk_buff
*skb
)
122 static inline void *netpoll_poll_lock(struct napi_struct
*napi
)
126 static inline void netpoll_poll_unlock(void *have
)
129 static inline void netpoll_netdev_init(struct net_device
*dev
)