Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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}