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
32 static unsigned long long
process_jbd2_dev_to_name(struct trace_seq * s,unsigned long long * args)33 process_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
41 static unsigned long long
process_jiffies_to_msecs(struct trace_seq * s,unsigned long long * args)42 process_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
PEVENT_PLUGIN_LOADER(struct pevent * pevent)50 int 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
PEVENT_PLUGIN_UNLOADER(struct pevent * pevent)68 void 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