Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Common code for low-level network console, dump, and debugger code
4 *
5 * Derived from netconsole, kgdb-over-ethernet, and netdump patches
6 */
7
8#ifndef _LINUX_NETPOLL_H
9#define _LINUX_NETPOLL_H
10
11#include <linux/netdevice.h>
12#include <linux/interrupt.h>
13#include <linux/rcupdate.h>
14#include <linux/list.h>
15#include <linux/refcount.h>
16
17union inet_addr {
18 __u32 all[4];
19 __be32 ip;
20 __be32 ip6[4];
21 struct in_addr in;
22 struct in6_addr in6;
23};
24
25struct netpoll {
26 struct net_device *dev;
27 netdevice_tracker dev_tracker;
28 char dev_name[IFNAMSIZ];
29 const char *name;
30
31 union inet_addr local_ip, remote_ip;
32 bool ipv6;
33 u16 local_port, remote_port;
34 u8 remote_mac[ETH_ALEN];
35};
36
37struct netpoll_info {
38 refcount_t refcnt;
39
40 struct semaphore dev_lock;
41
42 struct sk_buff_head txq;
43
44 struct delayed_work tx_work;
45
46 struct netpoll *netpoll;
47 struct rcu_head rcu;
48};
49
50#ifdef CONFIG_NETPOLL
51void netpoll_poll_dev(struct net_device *dev);
52void netpoll_poll_disable(struct net_device *dev);
53void netpoll_poll_enable(struct net_device *dev);
54#else
55static inline void netpoll_poll_disable(struct net_device *dev) { return; }
56static inline void netpoll_poll_enable(struct net_device *dev) { return; }
57#endif
58
59void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
60void netpoll_print_options(struct netpoll *np);
61int netpoll_parse_options(struct netpoll *np, char *opt);
62int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
63int netpoll_setup(struct netpoll *np);
64void __netpoll_cleanup(struct netpoll *np);
65void __netpoll_free(struct netpoll *np);
66void netpoll_cleanup(struct netpoll *np);
67void do_netpoll_cleanup(struct netpoll *np);
68netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
69
70#ifdef CONFIG_NETPOLL
71static inline void *netpoll_poll_lock(struct napi_struct *napi)
72{
73 struct net_device *dev = napi->dev;
74
75 if (dev && dev->npinfo) {
76 int owner = smp_processor_id();
77
78 while (cmpxchg(&napi->poll_owner, -1, owner) != -1)
79 cpu_relax();
80
81 return napi;
82 }
83 return NULL;
84}
85
86static inline void netpoll_poll_unlock(void *have)
87{
88 struct napi_struct *napi = have;
89
90 if (napi)
91 smp_store_release(&napi->poll_owner, -1);
92}
93
94static inline bool netpoll_tx_running(struct net_device *dev)
95{
96 return irqs_disabled();
97}
98
99#else
100static inline void *netpoll_poll_lock(struct napi_struct *napi)
101{
102 return NULL;
103}
104static inline void netpoll_poll_unlock(void *have)
105{
106}
107static inline bool netpoll_tx_running(struct net_device *dev)
108{
109 return false;
110}
111#endif
112
113#endif