[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / kmsg_dump.h

/*
 * linux/include/kmsg_dump.h
 *
 * Copyright (C) 2009 Net Insight AB
 *
 * Author: Simon Kagstrom <simon.kagstrom@netinsight.net>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */
#ifndef _LINUX_KMSG_DUMP_H
#define _LINUX_KMSG_DUMP_H

#include <linux/errno.h>
#include <linux/list.h>

/*
 * Keep this list arranged in rough order of priority. Anything listed after
 * KMSG_DUMP_OOPS will not be logged by default unless printk.always_kmsg_dump
 * is passed to the kernel.
 */
enum kmsg_dump_reason {
	KMSG_DUMP_PANIC,
	KMSG_DUMP_OOPS,
	KMSG_DUMP_EMERG,
	KMSG_DUMP_RESTART,
	KMSG_DUMP_HALT,
	KMSG_DUMP_POWEROFF,
};

/**
 * struct kmsg_dumper - kernel crash message dumper structure
 * @dump:	The callback which gets called on crashes. The buffer is passed
 * 		as two sections, where s1 (length l1) contains the older
 * 		messages and s2 (length l2) contains the newer.
 * @list:	Entry in the dumper list (private)
 * @registered:	Flag that specifies if this is already registered
 */
struct kmsg_dumper {
	void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason,
			const char *s1, unsigned long l1,
			const char *s2, unsigned long l2);
	struct list_head list;
	int registered;
};

#ifdef CONFIG_PRINTK
void kmsg_dump(enum kmsg_dump_reason reason);

int kmsg_dump_register(struct kmsg_dumper *dumper);

int kmsg_dump_unregister(struct kmsg_dumper *dumper);
#else
static inline void kmsg_dump(enum kmsg_dump_reason reason)
{
}

static inline int kmsg_dump_register(struct kmsg_dumper *dumper)
{
	return -EINVAL;
}

static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper)
{
	return -EINVAL;
}
#endif

#endif /* _LINUX_KMSG_DUMP_H */
Commit	Line	Data
456b565c SK	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
ac562241	15	#include <linux/errno.h>
456b565c SK	16	#include <linux/list.h>
456b565c SK	17
c22ab332 MG	18	/*
	19	* Keep this list arranged in rough order of priority. Anything listed after
	20	* KMSG_DUMP_OOPS will not be logged by default unless printk.always_kmsg_dump
	21	* is passed to the kernel.
	22	*/
456b565c	23	enum kmsg_dump_reason {
456b565c	24	KMSG_DUMP_PANIC,
c22ab332 MG	25	KMSG_DUMP_OOPS,
c22ab332 MG	26	KMSG_DUMP_EMERG,
04c6862c SA	27	KMSG_DUMP_RESTART,
	28	KMSG_DUMP_HALT,
	29	KMSG_DUMP_POWEROFF,
456b565c SK	30	};
	31
	32	/**
	33	* struct kmsg_dumper - kernel crash message dumper structure
	34	* @dump: The callback which gets called on crashes. The buffer is passed
	35	* as two sections, where s1 (length l1) contains the older
	36	* messages and s2 (length l2) contains the newer.
	37	* @list: Entry in the dumper list (private)
	38	* @registered: Flag that specifies if this is already registered
	39	*/
	40	struct kmsg_dumper {
	41	void (dump)(struct kmsg_dumper dumper, enum kmsg_dump_reason reason,
	42	const char *s1, unsigned long l1,
	43	const char *s2, unsigned long l2);
	44	struct list_head list;
	45	int registered;
	46	};
	47
595dd3d8	48	#ifdef CONFIG_PRINTK
456b565c SK	49	void kmsg_dump(enum kmsg_dump_reason reason);
	50
	51	int kmsg_dump_register(struct kmsg_dumper *dumper);
	52
	53	int kmsg_dump_unregister(struct kmsg_dumper *dumper);
595dd3d8 RD	54	#else
	55	static inline void kmsg_dump(enum kmsg_dump_reason reason)
	56	{
	57	}
	58
	59	static inline int kmsg_dump_register(struct kmsg_dumper *dumper)
	60	{
	61	return -EINVAL;
	62	}
	63
	64	static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper)
	65	{
	66	return -EINVAL;
	67	}
	68	#endif
456b565c SK	69
456b565c SK	70	#endif /* _LINUX_KMSG_DUMP_H */