/* 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 {struct in6_addr in6;struct netpoll {struct net_device *dev;/* * Either dev_name or dev_mac can be used to specify the local * interface - dev_name is used if it is a nonempty string, else * dev_mac is used. char dev_name[IFNAMSIZ];const char *name;union inet_addr local_ip, remote_ip;bool ipv6;struct sk_buff_head skb_pool;struct work_struct refill_wq;#define np_info(np, fmt, ...) \"%s: " fmt, np->name, ## __VA_ARGS__)#define np_err(np, fmt, ...) \"%s: " fmt, np->name, ## __VA_ARGS__)#define np_notice(np, fmt, ...) \"%s: " fmt, np->name, ## __VA_ARGS__)struct netpoll_info {struct semaphore dev_lock;struct sk_buff_head txq;struct delayed_work tx_work;struct netpoll *netpoll;struct rcu_head rcu;#ifdef CONFIG_NETPOLLvoid 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 int netpoll_send_udp(struct netpoll *np, const char *msg, int len);int __netpoll_setup(struct netpoll *np, struct net_device *ndev);int netpoll_setup(struct netpoll *np);void __netpoll_free(struct netpoll *np);void netpoll_cleanup(struct netpoll *np);void do_netpoll_cleanup(struct netpoll *np);struct netpoll *np, struct sk_buff *skb);#ifdef CONFIG_NETPOLLstatic inline void *netpoll_poll_lock(struct napi_struct *napi)struct net_device *dev = napi->dev;if (dev && rcu_access_pointer(dev->npinfo)) {int owner = smp_processor_id();while (cmpxchg(&napi->poll_owner, -1, owner) != -1)return napi;return NULL;static inline void netpoll_poll_unlock(void *have)struct napi_struct *napi = have;if (napi)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 quality 98%
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