include/linux/kmsg_dump.h

   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
  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 */