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#include "trace-seq.h"
26
27#define MINORBITS	20
28#define MINORMASK	((1U << MINORBITS) - 1)
29
30#define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))
31#define MINOR(dev)	((unsigned int) ((dev) & MINORMASK))
32
33static unsigned long long
34process_jbd2_dev_to_name(struct trace_seq *s, 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, unsigned long long *args)
44{
45	unsigned long long jiffies = args[0];
46
47	trace_seq_printf(s, "%lld", jiffies);
48	return jiffies;
49}
50
51int TEP_PLUGIN_LOADER(struct tep_handle *tep)
52{
53	tep_register_print_function(tep,
54				    process_jbd2_dev_to_name,
55				    TEP_FUNC_ARG_STRING,
56				    "jbd2_dev_to_name",
57				    TEP_FUNC_ARG_INT,
58				    TEP_FUNC_ARG_VOID);
59
60	tep_register_print_function(tep,
61				    process_jiffies_to_msecs,
62				    TEP_FUNC_ARG_LONG,
63				    "jiffies_to_msecs",
64				    TEP_FUNC_ARG_LONG,
65				    TEP_FUNC_ARG_VOID);
66	return 0;
67}
68
69void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
70{
71	tep_unregister_print_function(tep, process_jbd2_dev_to_name,
72				      "jbd2_dev_to_name");
73
74	tep_unregister_print_function(tep, process_jiffies_to_msecs,
75				      "jiffies_to_msecs");
76}