1 /* 2 * linux/include/kmsg_dump.h 3 * 4 * Copyright (C) 2009 Net Insight AB 5 * 6 * Author: Simon Kagstrom <[email protected]> 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 17 enum kmsg_dump_reason { 18 KMSG_DUMP_OOPS, 19 KMSG_DUMP_PANIC, 20 }; 21 22 /** 23 * struct kmsg_dumper - kernel crash message dumper structure 24 * @dump: The callback which gets called on crashes. The buffer is passed 25 * as two sections, where s1 (length l1) contains the older 26 * messages and s2 (length l2) contains the newer. 27 * @list: Entry in the dumper list (private) 28 * @registered: Flag that specifies if this is already registered 29 */ 30 struct kmsg_dumper { 31 void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason, 32 const char *s1, unsigned long l1, 33 const char *s2, unsigned long l2); 34 struct list_head list; 35 int registered; 36 }; 37 38 #ifdef CONFIG_PRINTK 39 void kmsg_dump(enum kmsg_dump_reason reason); 40 41 int kmsg_dump_register(struct kmsg_dumper *dumper); 42 43 int kmsg_dump_unregister(struct kmsg_dumper *dumper); 44 #else 45 static inline void kmsg_dump(enum kmsg_dump_reason reason) 46 { 47 } 48 49 static inline int kmsg_dump_register(struct kmsg_dumper *dumper) 50 { 51 return -EINVAL; 52 } 53 54 static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper) 55 { 56 return -EINVAL; 57 } 58 #endif 59 60 #endif /* _LINUX_KMSG_DUMP_H */ 61