1
2
3
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}
62