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, unsigned long long *args)
34{
35	unsigned int dev = args[0];
36
37	trace_seq_printf(s, "%d:%d", MAJOR(dev), MINOR(dev));
38	return 0;
39}
40
41static unsigned long long
42process_jiffies_to_msecs(struct trace_seq *s, unsigned long long *args)
43{
44	unsigned long long jiffies = args[0];
45
46	trace_seq_printf(s, "%lld", jiffies);
47	return jiffies;
48}
49
50int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
51{
52	pevent_register_print_function(pevent,
53				       process_jbd2_dev_to_name,
54				       PEVENT_FUNC_ARG_STRING,
55				       "jbd2_dev_to_name",
56				       PEVENT_FUNC_ARG_INT,
57				       PEVENT_FUNC_ARG_VOID);
58
59	pevent_register_print_function(pevent,
60				       process_jiffies_to_msecs,
61				       PEVENT_FUNC_ARG_LONG,
62				       "jiffies_to_msecs",
63				       PEVENT_FUNC_ARG_LONG,
64				       PEVENT_FUNC_ARG_VOID);
65	return 0;
66}
67
68void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
69{
70	pevent_unregister_print_function(pevent, process_jbd2_dev_to_name,
71					 "jbd2_dev_to_name");
72
73	pevent_unregister_print_function(pevent, process_jiffies_to_msecs,
74					 "jiffies_to_msecs");
75}
76