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git.proxmox.com Git - mirror_ubuntu-bionic-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 u32 local_ip
, remote_ip
;
22 u16 local_port
, remote_port
;
23 u8 remote_mac
[ETH_ALEN
];
30 struct netpoll
*rx_np
; /* netpoll that registered an rx_hook */
31 struct sk_buff_head arp_tx
; /* list of arp requests to reply to */
32 struct sk_buff_head txq
;
33 struct delayed_work tx_work
;
36 void netpoll_poll(struct netpoll
*np
);
37 void netpoll_send_udp(struct netpoll
*np
, const char *msg
, int len
);
38 void netpoll_print_options(struct netpoll
*np
);
39 int netpoll_parse_options(struct netpoll
*np
, char *opt
);
40 int netpoll_setup(struct netpoll
*np
);
41 int netpoll_trap(void);
42 void netpoll_set_trap(int trap
);
43 void netpoll_cleanup(struct netpoll
*np
);
44 int __netpoll_rx(struct sk_buff
*skb
);
48 static inline int netpoll_rx(struct sk_buff
*skb
)
50 struct netpoll_info
*npinfo
= skb
->dev
->npinfo
;
54 if (!npinfo
|| (!npinfo
->rx_np
&& !npinfo
->rx_flags
))
57 spin_lock_irqsave(&npinfo
->rx_lock
, flags
);
58 /* check rx_flags again with the lock held */
59 if (npinfo
->rx_flags
&& __netpoll_rx(skb
))
61 spin_unlock_irqrestore(&npinfo
->rx_lock
, flags
);
66 static inline int netpoll_receive_skb(struct sk_buff
*skb
)
68 if (!list_empty(&skb
->dev
->napi_list
))
69 return netpoll_rx(skb
);
73 static inline void *netpoll_poll_lock(struct napi_struct
*napi
)
75 struct net_device
*dev
= napi
->dev
;
77 rcu_read_lock(); /* deal with race on ->npinfo */
78 if (dev
&& dev
->npinfo
) {
79 spin_lock(&napi
->poll_lock
);
80 napi
->poll_owner
= smp_processor_id();
86 static inline void netpoll_poll_unlock(void *have
)
88 struct napi_struct
*napi
= have
;
91 napi
->poll_owner
= -1;
92 spin_unlock(&napi
->poll_lock
);
98 static inline int netpoll_rx(struct sk_buff
*skb
)
102 static inline int netpoll_receive_skb(struct sk_buff
*skb
)
106 static inline void *netpoll_poll_lock(struct napi_struct
*napi
)
110 static inline void netpoll_poll_unlock(void *have
)
113 static inline void netpoll_netdev_init(struct net_device
*dev
)