projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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/list.h> | |
| 13 | ||
| 14 | struct netpoll; | |
| 15 | ||
| 16 | struct netpoll { | |
| 17 | struct net_device *dev; | |
| 18 | char dev_name[16], *name; | |
| 1da177e4 LT |
19 | void (*rx_hook)(struct netpoll *, int, char *, int); |
| 20 | void (*drop)(struct sk_buff *skb); | |
| 21 | u32 local_ip, remote_ip; | |
| 22 | u16 local_port, remote_port; | |
| 23 | unsigned char local_mac[6], remote_mac[6]; | |
| 115c1d6e JM |
24 | }; |
| 25 | ||
| 26 | struct netpoll_info { | |
| 1da177e4 LT |
27 | spinlock_t poll_lock; |
| 28 | int poll_owner; | |
| 115c1d6e | 29 | int rx_flags; |
| fbeec2e1 JM |
30 | spinlock_t rx_lock; |
| 31 | struct netpoll *rx_np; /* netpoll that registered an rx_hook */ | |
| 1da177e4 LT |
32 | }; |
| 33 | ||
| 34 | void netpoll_poll(struct netpoll *np); | |
| 35 | void netpoll_send_udp(struct netpoll *np, const char *msg, int len); | |
| 36 | int netpoll_parse_options(struct netpoll *np, char *opt); | |
| 37 | int netpoll_setup(struct netpoll *np); | |
| 38 | int netpoll_trap(void); | |
| 39 | void netpoll_set_trap(int trap); | |
| 40 | void netpoll_cleanup(struct netpoll *np); | |
| 41 | int __netpoll_rx(struct sk_buff *skb); | |
| 42 | void netpoll_queue(struct sk_buff *skb); | |
| 43 | ||
| 44 | #ifdef CONFIG_NETPOLL | |
| 45 | static inline int netpoll_rx(struct sk_buff *skb) | |
| 46 | { | |
| 115c1d6e | 47 | struct netpoll_info *npinfo = skb->dev->npinfo; |
| fbeec2e1 JM |
48 | unsigned long flags; |
| 49 | int ret = 0; | |
| 115c1d6e | 50 | |
| fbeec2e1 | 51 | if (!npinfo || (!npinfo->rx_np && !npinfo->rx_flags)) |
| 115c1d6e JM |
52 | return 0; |
| 53 | ||
| fbeec2e1 JM |
54 | spin_lock_irqsave(&npinfo->rx_lock, flags); |
| 55 | /* check rx_flags again with the lock held */ | |
| 56 | if (npinfo->rx_flags && __netpoll_rx(skb)) | |
| 57 | ret = 1; | |
| 58 | spin_unlock_irqrestore(&npinfo->rx_lock, flags); | |
| 59 | ||
| 60 | return ret; | |
| 1da177e4 LT |
61 | } |
| 62 | ||
| 63 | static inline void netpoll_poll_lock(struct net_device *dev) | |
| 64 | { | |
| 115c1d6e JM |
65 | if (dev->npinfo) { |
| 66 | spin_lock(&dev->npinfo->poll_lock); | |
| 67 | dev->npinfo->poll_owner = smp_processor_id(); | |
| 1da177e4 LT |
68 | } |
| 69 | } | |
| 70 | ||
| 71 | static inline void netpoll_poll_unlock(struct net_device *dev) | |
| 72 | { | |
| 115c1d6e JM |
73 | if (dev->npinfo) { |
| 74 | dev->npinfo->poll_owner = -1; | |
| 75 | spin_unlock(&dev->npinfo->poll_lock); | |
| 1da177e4 LT |
76 | } |
| 77 | } | |
| 78 | ||
| 79 | #else | |
| 80 | #define netpoll_rx(a) 0 | |
| 81 | #define netpoll_poll_lock(a) | |
| 82 | #define netpoll_poll_unlock(a) | |
| 83 | #endif | |
| 84 | ||
| 85 | #endif |