LXR linux/include/linux/kmsg

   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/errno.h>
  16#include <linux/list.h>
  17
  18enum 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 */
  36struct 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
  45void kmsg_dump(enum kmsg_dump_reason reason);
  46
  47int kmsg_dump_register(struct kmsg_dumper *dumper);
  48
  49int kmsg_dump_unregister(struct kmsg_dumper *dumper);
  50#else
  51static inline void kmsg_dump(enum kmsg_dump_reason reason)
  52{
  53}
  54
  55static inline int kmsg_dump_register(struct kmsg_dumper *dumper)
  56{
  57        return -EINVAL;
  58}
  59
  60static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper)
  61{
  62        return -EINVAL;
  63}
  64#endif
  65
  66#endif /* _LINUX_KMSG_DUMP_H */
  67