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_KEXEC, 22 KMSG_DUMP_RESTART, 23 KMSG_DUMP_HALT, 24 KMSG_DUMP_POWEROFF, 25 KMSG_DUMP_EMERG, 26 }; 27 28 /** 29 * struct kmsg_dumper - kernel crash message dumper structure 30 * @dump: The callback which gets called on crashes. The buffer is passed 31 * as two sections, where s1 (length l1) contains the older 32 * messages and s2 (length l2) contains the newer. 33 * @list: Entry in the dumper list (private) 34 * @registered: Flag that specifies if this is already registered 35 */ 36 struct kmsg_dumper { 37 void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason, 38 const char *s1, unsigned long l1, 39 const char *s2, unsigned long l2); 40 struct list_head list; 41 int registered; 42 }; 43 44 #ifdef CONFIG_PRINTK 45 void kmsg_dump(enum kmsg_dump_reason reason); 46 47 int kmsg_dump_register(struct kmsg_dumper *dumper); 48 49 int kmsg_dump_unregister(struct kmsg_dumper *dumper); 50 #else 51 static inline void kmsg_dump(enum kmsg_dump_reason reason) 52 { 53 } 54 55 static inline int kmsg_dump_register(struct kmsg_dumper *dumper) 56 { 57 return -EINVAL; 58 } 59 60 static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper) 61 { 62 return -EINVAL; 63 } 64 #endif 65 66 #endif /* _LINUX_KMSG_DUMP_H */ 67