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 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 */ 31 struct 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 40 void kmsg_dump(enum kmsg_dump_reason reason); 41 42 int kmsg_dump_register(struct kmsg_dumper *dumper); 43 44 int kmsg_dump_unregister(struct kmsg_dumper *dumper); 45 #else 46 static inline void kmsg_dump(enum kmsg_dump_reason reason) 47 { 48 } 49 50 static inline int kmsg_dump_register(struct kmsg_dumper *dumper) 51 { 52 return -EINVAL; 53 } 54 55 static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper) 56 { 57 return -EINVAL; 58 } 59 #endif 60 61 #endif /* _LINUX_KMSG_DUMP_H */ 62