1// SPDX-License-Identifier: LGPL-2.1
 2/*
 3 * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
 4 */
 5#include <stdio.h>
 6#include <stdlib.h>
 7#include <string.h>
 8
 9#include "event-parse.h"
10#include "trace-seq.h"
11
12#define MINORBITS	20
13#define MINORMASK	((1U << MINORBITS) - 1)
14
15#define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))
16#define MINOR(dev)	((unsigned int) ((dev) & MINORMASK))
17
18static unsigned long long
19process_jbd2_dev_to_name(struct trace_seq *s, unsigned long long *args)
20{
21	unsigned int dev = args[0];
22
23	trace_seq_printf(s, "%d:%d", MAJOR(dev), MINOR(dev));
24	return 0;
25}
26
27static unsigned long long
28process_jiffies_to_msecs(struct trace_seq *s, unsigned long long *args)
29{
30	unsigned long long jiffies = args[0];
31
32	trace_seq_printf(s, "%lld", jiffies);
33	return jiffies;
34}
35
36int TEP_PLUGIN_LOADER(struct tep_handle *tep)
37{
38	tep_register_print_function(tep,
39				    process_jbd2_dev_to_name,
40				    TEP_FUNC_ARG_STRING,
41				    "jbd2_dev_to_name",
42				    TEP_FUNC_ARG_INT,
43				    TEP_FUNC_ARG_VOID);
44
45	tep_register_print_function(tep,
46				    process_jiffies_to_msecs,
47				    TEP_FUNC_ARG_LONG,
48				    "jiffies_to_msecs",
49				    TEP_FUNC_ARG_LONG,
50				    TEP_FUNC_ARG_VOID);
51	return 0;
52}
53
54void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
55{
56	tep_unregister_print_function(tep, process_jbd2_dev_to_name,
57				      "jbd2_dev_to_name");
58
59	tep_unregister_print_function(tep, process_jiffies_to_msecs,
60				      "jiffies_to_msecs");
61}