// 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 disk_name:string(hd:long, partno:long) { if (!partno) return kernel_string(@cast(hd, "gendisk", "kernel")->disk_name) disk_name = kernel_string(@cast(hd, "gendisk", "kernel")->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) } function bdevname:string(bdev:long) { bdev = & @cast(bdev, "block_device", "kernel") if (bdev == 0) return "N/A" hd = bdev->bd_disk if (@defined(@cast(bdev, "block_device", "kernel")->bd_partno)) partno = bdev->bd_partno else if (bdev->bd_part) partno = bdev->bd_part->partno else partno = MINOR(bdev->bd_dev) - hd->first_minor; return disk_name(hd, partno) }

Simpan