blob: 746460cca4b4eb1fc5ed2f0fd7d7549948e0c22f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
// Block I/O tapset
// Copyright (C) 2006 Intel Corp.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
%{
#include <linux/blkdev.h>
%}
/* probe ioblock.submit
*
* Fires whenever a block I/O is submitted.
*
* Context:
* The process which submits block I/O
*
* Arguments:
* rw_string - string (READ/WRITE).
* rw - binary trace for read/write
* sector - beginning sector for the entire bio
* bio_devname - block device name
*/
probe ioblock.submit
= kernel.function("submit_bio")
{
rw_string = bio_read_write($rw);
rw = $rw
sector = $bio->bi_sector
bio_devname = bio_devname($bio)
}
/* probe ioblock.end
*
* Fires whenever a block I/O transfer is complete.
*
* Context:
* The process which signals the transfer is done.
*
* Arguments:
* rw_string - string (READ/WRITE).
* rw - binary trace for read/write
* sector - beginning sector for the entire bio
* bytes_done - number of bytes done
* error - success: 0
* bio_devname - block device name
*/
probe ioblock.end
= kernel.function("bio_endio")
{
rw_string = bio_read_write($bio->bi_rw)
rw = $bio->bi_rw
sector = $bio->bi_sector
bytes_done = $bytes_done;
error = $error;
bio_devname = bio_devname($bio)
}
/* Return the block device name */
function bio_devname:string(bio:long)
%{
char b[BDEVNAME_SIZE];
struct bio *bp;
bp = (struct bio *) ((unsigned long) THIS->bio);
bdevname(bp->bi_bdev,b);
sprintf(THIS->__retvalue,"%s",b);
%}
/* Return a READ/WRITE status string */
function bio_read_write:string(var_rw:long)
%{
sprintf(THIS->__retvalue,"%s", (THIS->var_rw & WRITE) ? "WRITE" : "READ");
%}
|
