/* SPDX-License-Identifier: GPL-2.0 */
|
/*
|
* 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>
|
#include <linux/refcount.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 netpoll_info {
|
refcount_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
|
void netpoll_poll_dev(struct net_device *dev);
|
void netpoll_poll_disable(struct net_device *dev);
|
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(struct netpoll *np);
|
void netpoll_cleanup(struct netpoll *np);
|
netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
|
|
#ifdef CONFIG_NETPOLL
|
static inline void *netpoll_poll_lock(struct napi_struct *napi)
|
{
|
struct net_device *dev = napi->dev;
|
|
if (dev && dev->npinfo) {
|
int owner = smp_processor_id();
|
|
while (cmpxchg(&napi->poll_owner, -1, owner) != -1)
|
cpu_relax();
|
|
return napi;
|
}
|
return NULL;
|
}
|
|
static inline void netpoll_poll_unlock(void *have)
|
{
|
struct napi_struct *napi = have;
|
|
if (napi)
|
smp_store_release(&napi->poll_owner, -1);
|
}
|
|
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 bool netpoll_tx_running(struct net_device *dev)
|
{
|
return false;
|
}
|
#endif
|
|
#endif
|
