tools lib traceevent: Add jbd2 plugin

PEVENT_LIB_OBJS += parse-utils.o

PEVENT_LIB_OBJS += kbuffer-parse.o

PLUGIN_OBJS = plugin_jbd2.o

PLUGINS := $(PLUGIN_OBJS:.o=.so)

ALL_OBJS = $(PEVENT_LIB_OBJS) $(PLUGIN_OBJS)

/*

 * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation;

 * version 2.1 of the License (not later!)

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this program; if not,  see <http://www.gnu.org/licenses>

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "event-parse.h"

#define MINORBITS	20

#define MINORMASK	((1U << MINORBITS) - 1)

#define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))

#define MINOR(dev)	((unsigned int) ((dev) & MINORMASK))

unsigned long long process_jbd2_dev_to_name(struct trace_seq *s,

					    unsigned long long *args)

{

	unsigned int dev = args[0];

	trace_seq_printf(s, "%d:%d", MAJOR(dev), MINOR(dev));

	return 0;

}

unsigned long long process_jiffies_to_msecs(struct trace_seq *s,

					    unsigned long long *args)

{

	unsigned long long jiffies = args[0];

	trace_seq_printf(s, "%lld", jiffies);

	return jiffies;

}

int PEVENT_PLUGIN_LOADER(struct pevent *pevent)

{

	pevent_register_print_function(pevent,

				       process_jbd2_dev_to_name,

				       PEVENT_FUNC_ARG_STRING,

				       "jbd2_dev_to_name",

				       PEVENT_FUNC_ARG_INT,

				       PEVENT_FUNC_ARG_VOID);

	pevent_register_print_function(pevent,

				       process_jiffies_to_msecs,

				       PEVENT_FUNC_ARG_LONG,

				       "jiffies_to_msecs",

				       PEVENT_FUNC_ARG_LONG,

				       PEVENT_FUNC_ARG_VOID);

	return 0;

}