| | 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/rcupdate.h> |
| | 13 | #include <linux/list.h> |
| | 14 | |
| | 15 | union inet_addr { |
| | 16 | __u32 all[4]; |
| | 17 | __be32 ip; |
| | 18 | __be32 ip6[4]; |
| | 19 | struct in_addr in; |
| | 20 | struct in6_addr in6; |
| | 21 | }; |
| | 22 | |
| | 23 | struct netpoll { |
| | 24 | struct net_device *dev; |
| | 25 | char dev_name[IFNAMSIZ]; |
| | 26 | const char *name; |
| | 27 | |
| | 28 | union inet_addr local_ip, remote_ip; |
| | 29 | bool ipv6; |
| | 30 | u16 local_port, remote_port; |
| | 31 | u8 remote_mac[ETH_ALEN]; |
| | 32 | |
| | 33 | struct work_struct cleanup_work; |
| | 34 | }; |
| | 35 | |
| | 36 | struct netpoll_info { |
| | 37 | atomic_t refcnt; |
| | 38 | |
| | 39 | struct semaphore dev_lock; |
| | 40 | |
| | 41 | struct sk_buff_head txq; |
| | 42 | |
| | 43 | struct delayed_work tx_work; |
| | 44 | |
| | 45 | struct netpoll *netpoll; |
| | 46 | struct rcu_head rcu; |
| | 47 | }; |
| | 48 | |
| | 49 | #ifdef CONFIG_NETPOLL |
| | 50 | extern void netpoll_poll_disable(struct net_device *dev); |
| | 51 | extern void netpoll_poll_enable(struct net_device *dev); |
| | 52 | #else |
| | 53 | static inline void netpoll_poll_disable(struct net_device *dev) { return; } |
| | 54 | static inline void netpoll_poll_enable(struct net_device *dev) { return; } |
| | 55 | #endif |
| | 56 | |
| | 57 | void netpoll_send_udp(struct netpoll *np, const char *msg, int len); |
| | 58 | void netpoll_print_options(struct netpoll *np); |
| | 59 | int netpoll_parse_options(struct netpoll *np, char *opt); |
| | 60 | int __netpoll_setup(struct netpoll *np, struct net_device *ndev); |
| | 61 | int netpoll_setup(struct netpoll *np); |
| | 62 | void __netpoll_cleanup(struct netpoll *np); |
| | 63 | void __netpoll_free_async(struct netpoll *np); |
| | 64 | void netpoll_cleanup(struct netpoll *np); |
| | 65 | void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb, |
| | 66 | struct net_device *dev); |
| | 67 | static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb) |
| | 68 | { |
| | 69 | unsigned long flags; |
| | 70 | local_irq_save(flags); |
| | 71 | netpoll_send_skb_on_dev(np, skb, np->dev); |
| | 72 | local_irq_restore(flags); |
| | 73 | } |
| | 74 | |
| | 75 | #ifdef CONFIG_NETPOLL |
| | 76 | static inline void *netpoll_poll_lock(struct napi_struct *napi) |
| | 77 | { |
| | 78 | struct net_device *dev = napi->dev; |
| | 79 | |
| | 80 | if (dev && dev->npinfo) { |
| | 81 | spin_lock(&napi->poll_lock); |
| | 82 | napi->poll_owner = smp_processor_id(); |
| | 83 | return napi; |
| | 84 | } |
| | 85 | return NULL; |
| | 86 | } |
| | 87 | |
| | 88 | static inline void netpoll_poll_unlock(void *have) |
| | 89 | { |
| | 90 | struct napi_struct *napi = have; |
| | 91 | |
| | 92 | if (napi) { |
| | 93 | napi->poll_owner = -1; |
| | 94 | spin_unlock(&napi->poll_lock); |
| | 95 | } |
| | 96 | } |
| | 97 | |
| | 98 | static inline bool netpoll_tx_running(struct net_device *dev) |
| | 99 | { |
| | 100 | return irqs_disabled(); |
| | 101 | } |
| | 102 | |
| | 103 | #else |
| | 104 | static inline void *netpoll_poll_lock(struct napi_struct *napi) |
| | 105 | { |
| | 106 | return NULL; |
| | 107 | } |
| | 108 | static inline void netpoll_poll_unlock(void *have) |
| | 109 | { |
| | 110 | } |
| | 111 | static inline void netpoll_netdev_init(struct net_device *dev) |
| | 112 | { |
| | 113 | } |
| | 114 | static inline bool netpoll_tx_running(struct net_device *dev) |
| | 115 | { |
| | 116 | return false; |
| | 117 | } |
| | 118 | #endif |
| | 119 | |
| | 120 | #endif |
projects / deliverable / linux.git / blame_incremental