1/* 2 * linux/include/kmsg_dump.h 3 * 4 * Copyright (C) 2009 Net Insight AB 5 * 6 * Author: Simon Kagstrom <simon.kagstrom@netinsight.net> 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file COPYING in the main directory of this archive 10 * for more details. 11 */ 12#ifndef _LINUX_KMSG_DUMP_H 13#define _LINUX_KMSG_DUMP_H 14 15#include <linux/list.h> 16 17enum kmsg_dump_reason { 18 KMSG_DUMP_OOPS, 19 KMSG_DUMP_PANIC, 20 KMSG_DUMP_KEXEC, 21}; 22 23/** 24 * struct kmsg_dumper - kernel crash message dumper structure 25 * @dump: The callback which gets called on crashes. The buffer is passed 26 * as two sections, where s1 (length l1) contains the older 27 * messages and s2 (length l2) contains the newer. 28 * @list: Entry in the dumper list (private) 29 * @registered: Flag that specifies if this is already registered 30 */ 31struct kmsg_dumper { 32 void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason, 33 const char *s1, unsigned long l1, 34 const char *s2, unsigned long l2); 35 struct list_head list; 36 int registered; 37}; 38 39#ifdef CONFIG_PRINTK 40void kmsg_dump(enum kmsg_dump_reason reason); 41 42int kmsg_dump_register(struct kmsg_dumper *dumper); 43 44int kmsg_dump_unregister(struct kmsg_dumper *dumper); 45#else 46static inline void kmsg_dump(enum kmsg_dump_reason reason) 47{ 48} 49 50static inline int kmsg_dump_register(struct kmsg_dumper *dumper) 51{ 52 return -EINVAL; 53} 54 55static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper) 56{ 57 return -EINVAL; 58} 59#endif 60 61#endif /* _LINUX_KMSG_DUMP_H */ 62