/usr/share/systemtap/tapset/linux/dev.stp is in systemtap-common 2.3-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | // Device tapset
// Copyright (C) 2008, 2010 Red Hat 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/kdev_t.h>
%}
/**
* sfunction MAJOR - Extract major device number from a kernel device number (kdev_t)
*
* @dev: Kernel device number to query.
*/
function MAJOR:long(dev:long)
%{ /* pure */
STAP_RETVALUE = MAJOR(STAP_ARG_dev);
%}
/**
* sfunction MINOR - Extract minor device number from a kernel device number (kdev_t)
*
* @dev: Kernel device number to query.
*/
function MINOR:long(dev:long)
%{ /* pure */
STAP_RETVALUE = MINOR(STAP_ARG_dev);
%}
/**
* sfunction MKDEF - Creates a value that can be compared to a kernel device number (kdev_t)
*
* @major: Intended major device number.
* @minor: Intended minor device number.
*/
function MKDEV:long(major:long, minor:long)
%{ /* pure */
STAP_RETVALUE = MKDEV(STAP_ARG_major,STAP_ARG_minor);
%}
/**
* sfunction usrdev2kerndev - Converts a user-space device number into the format used in the kernel
*
* @dev: Device number in user-space format.
*/
function usrdev2kerndev:long(dev:long)
%{ /* pure */
STAP_RETVALUE = new_decode_dev(STAP_ARG_dev);
%}
function bdevname:string(bdev:long)
{
if (bdev == 0)
return "N/A"
hd = @cast(bdev, "block_device")->bd_disk
if (@cast(bdev, "block_device")->bd_part)
partno = @cast(bdev, "block_device")->bd_part->partno
else
partno = MINOR(@cast(bdev, "block_device")->bd_dev)
- @cast(bdev, "block_device")->bd_disk->first_minor;
if (!partno)
return kernel_string(@cast(hd, "gendisk")->disk_name)
disk_name = kernel_string(@cast(hd, "gendisk")->disk_name)
if (isdigit(substr(disk_name, strlen(disk_name) - 1, 1)))
return sprintf("%sp%d", disk_name, partno)
else
return sprintf("%s%d", disk_name, partno)
}
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