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/*
* Common code for low-level network console, dump, and debugger code
*
* Derived from netconsole, kgdb-over-ethernet, and netdump patches
*/
#ifndef _LINUX_NETPOLL_H
#define _LINUX_NETPOLL_H
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
union inet_addr {
__u32 all[4];
__be32 ip;
__be32 ip6[4];
struct in_addr in;
struct in6_addr in6;
};
struct netpoll {
struct net_device *dev;
char dev_name[IFNAMSIZ];
const char *name;
union inet_addr local_ip, remote_ip;
bool ipv6;
u16 local_port, remote_port;
u8 remote_mac[ETH_ALEN];
struct work_struct cleanup_work;
};
struct netpoll_info {
atomic_t refcnt;
struct semaphore dev_lock;
struct sk_buff_head txq;
struct delayed_work tx_work;
struct netpoll *netpoll;
struct rcu_head rcu;
};
#ifdef CONFIG_NETPOLL
extern void netpoll_poll_disable(struct net_device *dev);
extern void netpoll_poll_enable(struct net_device *dev);
#else
static inline void netpoll_poll_disable(struct net_device *dev) { return; }
static inline void netpoll_poll_enable(struct net_device *dev) { return; }
#endif
void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
void netpoll_print_options(struct netpoll *np);
int netpoll_parse_options(struct netpoll *np, char *opt);
int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
int netpoll_setup(struct netpoll *np);
void __netpoll_cleanup(struct netpoll *np);
void __netpoll_free_async(struct netpoll *np);
void netpoll_cleanup(struct netpoll *np);
void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
struct net_device *dev);
static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
{
unsigned long flags;
local_irq_save(flags);
netpoll_send_skb_on_dev(np, skb, np->dev);
local_irq_restore(flags);
}
#ifdef CONFIG_NETPOLL
static inline void *netpoll_poll_lock(struct napi_struct *napi)
{
struct net_device *dev = napi->dev;
if (dev && dev->npinfo) {
spin_lock(&napi->poll_lock);
napi->poll_owner = smp_processor_id();
return napi;
}
return NULL;
}
static inline void netpoll_poll_unlock(void *have)
{
struct napi_struct *napi = have;
if (napi) {
napi->poll_owner = -1;
spin_unlock(&napi->poll_lock);
}
}
static inline bool netpoll_tx_running(struct net_device *dev)
{
return irqs_disabled();
}
#else
static inline void *netpoll_poll_lock(struct napi_struct *napi)
{
return NULL;
}
static inline void netpoll_poll_unlock(void *have)
{
}
static inline void netpoll_netdev_init(struct net_device *dev)
{
}
static inline bool netpoll_tx_running(struct net_device *dev)
{
return false;
}
#endif
#endif