1/*
 2 * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
 3 *
 4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU Lesser General Public
 7 * License as published by the Free Software Foundation;
 8 * version 2.1 of the License (not later!)
 9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not,  see <http://www.gnu.org/licenses>
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 */
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23
24#include "event-parse.h"
25
26#define MINORBITS	20
27#define MINORMASK	((1U << MINORBITS) - 1)
28
29#define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))
30#define MINOR(dev)	((unsigned int) ((dev) & MINORMASK))
31
32static unsigned long long
33process_jbd2_dev_to_name(struct trace_seq *s,
34			 unsigned long long *args)
35{
36	unsigned int dev = args[0];
37
38	trace_seq_printf(s, "%d:%d", MAJOR(dev), MINOR(dev));
39	return 0;
40}
41
42static unsigned long long
43process_jiffies_to_msecs(struct trace_seq *s,
44			 unsigned long long *args)
45{
46	unsigned long long jiffies = args[0];
47
48	trace_seq_printf(s, "%lld", jiffies);
49	return jiffies;
50}
51
52int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
53{
54	pevent_register_print_function(pevent,
55				       process_jbd2_dev_to_name,
56				       PEVENT_FUNC_ARG_STRING,
57				       "jbd2_dev_to_name",
58				       PEVENT_FUNC_ARG_INT,
59				       PEVENT_FUNC_ARG_VOID);
60
61	pevent_register_print_function(pevent,
62				       process_jiffies_to_msecs,
63				       PEVENT_FUNC_ARG_LONG,
64				       "jiffies_to_msecs",
65				       PEVENT_FUNC_ARG_LONG,
66				       PEVENT_FUNC_ARG_VOID);
67	return 0;
68}
69
70void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
71{
72	pevent_unregister_print_function(pevent, process_jbd2_dev_to_name,
73					 "jbd2_dev_to_name");
74
75	pevent_unregister_print_function(pevent, process_jiffies_to_msecs,
76					 "jiffies_to_msecs");
77}