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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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ccc7edf0ad
Move netpoll_print_options() from net/core/netpoll.c to drivers/net/netconsole.c and make it static. This function is only used by netconsole, so there's no need to export it or keep it in the public netpoll API. This reduces the netpoll API surface and improves code locality by keeping netconsole-specific functionality within the netconsole driver. Signed-off-by: Breno Leitao <leitao@debian.org> Link: https://patch.msgid.link/20250613-rework-v3-4-0752bf2e6912@debian.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Common code for low-level network console, dump, and debugger code
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*
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* Derived from netconsole, kgdb-over-ethernet, and netdump patches
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*/
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#ifndef _LINUX_NETPOLL_H
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#define _LINUX_NETPOLL_H
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#include <linux/netdevice.h>
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#include <linux/interrupt.h>
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#include <linux/rcupdate.h>
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#include <linux/list.h>
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#include <linux/refcount.h>
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union inet_addr {
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__u32 all[4];
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__be32 ip;
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__be32 ip6[4];
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struct in_addr in;
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struct in6_addr in6;
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};
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struct netpoll {
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struct net_device *dev;
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netdevice_tracker dev_tracker;
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/*
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* Either dev_name or dev_mac can be used to specify the local
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* interface - dev_name is used if it is a nonempty string, else
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* dev_mac is used.
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*/
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char dev_name[IFNAMSIZ];
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u8 dev_mac[ETH_ALEN];
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const char *name;
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union inet_addr local_ip, remote_ip;
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bool ipv6;
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u16 local_port, remote_port;
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u8 remote_mac[ETH_ALEN];
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struct sk_buff_head skb_pool;
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struct work_struct refill_wq;
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};
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#define np_info(np, fmt, ...) \
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pr_info("%s: " fmt, np->name, ##__VA_ARGS__)
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#define np_err(np, fmt, ...) \
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pr_err("%s: " fmt, np->name, ##__VA_ARGS__)
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#define np_notice(np, fmt, ...) \
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pr_notice("%s: " fmt, np->name, ##__VA_ARGS__)
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struct netpoll_info {
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refcount_t refcnt;
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struct semaphore dev_lock;
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struct sk_buff_head txq;
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struct delayed_work tx_work;
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struct netpoll *netpoll;
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struct rcu_head rcu;
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};
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#ifdef CONFIG_NETPOLL
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void netpoll_poll_dev(struct net_device *dev);
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void netpoll_poll_disable(struct net_device *dev);
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void netpoll_poll_enable(struct net_device *dev);
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#else
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static inline void netpoll_poll_disable(struct net_device *dev) { return; }
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static inline void netpoll_poll_enable(struct net_device *dev) { return; }
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#endif
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int netpoll_send_udp(struct netpoll *np, const char *msg, int len);
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int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
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int netpoll_setup(struct netpoll *np);
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void __netpoll_free(struct netpoll *np);
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void netpoll_cleanup(struct netpoll *np);
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void do_netpoll_cleanup(struct netpoll *np);
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netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
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#ifdef CONFIG_NETPOLL
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static inline void *netpoll_poll_lock(struct napi_struct *napi)
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{
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struct net_device *dev = napi->dev;
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if (dev && rcu_access_pointer(dev->npinfo)) {
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int owner = smp_processor_id();
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while (cmpxchg(&napi->poll_owner, -1, owner) != -1)
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cpu_relax();
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return napi;
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}
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return NULL;
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}
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static inline void netpoll_poll_unlock(void *have)
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{
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struct napi_struct *napi = have;
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if (napi)
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smp_store_release(&napi->poll_owner, -1);
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}
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static inline bool netpoll_tx_running(struct net_device *dev)
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{
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return irqs_disabled();
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}
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#else
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static inline void *netpoll_poll_lock(struct napi_struct *napi)
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{
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return NULL;
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}
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static inline void netpoll_poll_unlock(void *have)
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{
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}
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static inline bool netpoll_tx_running(struct net_device *dev)
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{
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return false;
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}
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#endif
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#endif
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