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/errno.h> 16 #include <linux/list.h> 17 18 enum kmsg_dump_reason { 19 KMSG_DUMP_OOPS, 20 KMSG_DUMP_PANIC, 21 KMSG_DUMP_RESTART, 22 KMSG_DUMP_HALT, 23 KMSG_DUMP_POWEROFF, 24 KMSG_DUMP_EMERG, 25 }; 26 27 /** 28 * struct kmsg_dumper - kernel crash message dumper structure 29 * @dump: The callback which gets called on crashes. The buffer is passed 30 * as two sections, where s1 (length l1) contains the older 31 * messages and s2 (length l2) contains the newer. 32 * @list: Entry in the dumper list (private) 33 * @registered: Flag that specifies if this is already registered 34 */ 35 struct kmsg_dumper { 36 void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason, 37 const char *s1, unsigned long l1, 38 const char *s2, unsigned long l2); 39 struct list_head list; 40 int registered; 41 }; 42 43 #ifdef CONFIG_PRINTK 44 void kmsg_dump(enum kmsg_dump_reason reason); 45 46 int kmsg_dump_register(struct kmsg_dumper *dumper); 47 48 int kmsg_dump_unregister(struct kmsg_dumper *dumper); 49 #else 50 static inline void kmsg_dump(enum kmsg_dump_reason reason) 51 { 52 } 53 54 static inline int kmsg_dump_register(struct kmsg_dumper *dumper) 55 { 56 return -EINVAL; 57 } 58 59 static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper) 60 { 61 return -EINVAL; 62 } 63 #endif 64 65 #endif /* _LINUX_KMSG_DUMP_H */ 66