1#!/bin/bash 2# 3# Shell functions for the rest of the scripts. 4# 5# This program is free software; you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation; either version 2 of the License, or 8# (at your option) any later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program; if not, you can access it online at 17# http://www.gnu.org/licenses/gpl-2.0.html. 18# 19# Copyright (C) IBM Corporation, 2013 20# 21# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com> 22 23# bootparam_hotplug_cpu bootparam-string 24# 25# Returns 1 if the specified boot-parameter string tells rcutorture to 26# test CPU-hotplug operations. 27bootparam_hotplug_cpu () { 28 echo "$1" | grep -q "rcutorture\.onoff_" 29} 30 31# checkarg --argname argtype $# arg mustmatch cannotmatch 32# 33# Checks the specified argument "arg" against the mustmatch and cannotmatch 34# patterns. 35checkarg () { 36 if test $3 -le 1 37 then 38 echo $1 needs argument $2 matching \"$5\" 39 usage 40 fi 41 if echo "$4" | grep -q -e "$5" 42 then 43 : 44 else 45 echo $1 $2 \"$4\" must match \"$5\" 46 usage 47 fi 48 if echo "$4" | grep -q -e "$6" 49 then 50 echo $1 $2 \"$4\" must not match \"$6\" 51 usage 52 fi 53} 54 55# configfrag_boot_params bootparam-string config-fragment-file 56# 57# Adds boot parameters from the .boot file, if any. 58configfrag_boot_params () { 59 if test -r "$2.boot" 60 then 61 echo $1 `grep -v '^#' "$2.boot" | tr '\012' ' '` 62 else 63 echo $1 64 fi 65} 66 67# configfrag_boot_cpus bootparam-string config-fragment-file config-cpus 68# 69# Decreases number of CPUs based on any nr_cpus= boot parameters specified. 70configfrag_boot_cpus () { 71 local bootargs="`configfrag_boot_params "$1" "$2"`" 72 local nr_cpus 73 if echo "${bootargs}" | grep -q 'nr_cpus=[0-9]' 74 then 75 nr_cpus="`echo "${bootargs}" | sed -e 's/^.*nr_cpus=\([0-9]*\).*$/\1/'`" 76 if test "$3" -gt "$nr_cpus" 77 then 78 echo $nr_cpus 79 else 80 echo $3 81 fi 82 else 83 echo $3 84 fi 85} 86 87# configfrag_boot_maxcpus bootparam-string config-fragment-file config-cpus 88# 89# Decreases number of CPUs based on any maxcpus= boot parameters specified. 90# This allows tests where additional CPUs come online later during the 91# test run. However, the torture parameters will be set based on the 92# number of CPUs initially present, so the scripting should schedule 93# test runs based on the maxcpus= boot parameter controlling the initial 94# number of CPUs instead of on the ultimate number of CPUs. 95configfrag_boot_maxcpus () { 96 local bootargs="`configfrag_boot_params "$1" "$2"`" 97 local maxcpus 98 if echo "${bootargs}" | grep -q 'maxcpus=[0-9]' 99 then 100 maxcpus="`echo "${bootargs}" | sed -e 's/^.*maxcpus=\([0-9]*\).*$/\1/'`" 101 if test "$3" -gt "$maxcpus" 102 then 103 echo $maxcpus 104 else 105 echo $3 106 fi 107 else 108 echo $3 109 fi 110} 111 112# configfrag_hotplug_cpu config-fragment-file 113# 114# Returns 1 if the config fragment specifies hotplug CPU. 115configfrag_hotplug_cpu () { 116 if test ! -r "$1" 117 then 118 echo Unreadable config fragment "$1" 1>&2 119 exit -1 120 fi 121 grep -q '^CONFIG_HOTPLUG_CPU=y$' "$1" 122} 123 124# identify_boot_image qemu-cmd 125# 126# Returns the relative path to the kernel build image. This will be 127# arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the 128# architecture, unless overridden with the TORTURE_BOOT_IMAGE environment 129# variable. 130identify_boot_image () { 131 if test -n "$TORTURE_BOOT_IMAGE" 132 then 133 echo $TORTURE_BOOT_IMAGE 134 else 135 case "$1" in 136 qemu-system-x86_64|qemu-system-i386) 137 echo arch/x86/boot/bzImage 138 ;; 139 *) 140 echo vmlinux 141 ;; 142 esac 143 fi 144} 145 146# identify_qemu builddir 147# 148# Returns our best guess as to which qemu command is appropriate for 149# the kernel at hand. Override with the TORTURE_QEMU_CMD environment variable. 150identify_qemu () { 151 local u="`file "$1"`" 152 if test -n "$TORTURE_QEMU_CMD" 153 then 154 echo $TORTURE_QEMU_CMD 155 elif echo $u | grep -q x86-64 156 then 157 echo qemu-system-x86_64 158 elif echo $u | grep -q "Intel 80386" 159 then 160 echo qemu-system-i386 161 elif uname -a | grep -q ppc64 162 then 163 echo qemu-system-ppc64 164 else 165 echo Cannot figure out what qemu command to use! 1>&2 166 echo file $1 output: $u 167 # Usually this will be one of /usr/bin/qemu-system-* 168 # Use TORTURE_QEMU_CMD environment variable or appropriate 169 # argument to top-level script. 170 exit 1 171 fi 172} 173 174# identify_qemu_append qemu-cmd 175# 176# Output arguments for the qemu "-append" string based on CPU type 177# and the TORTURE_QEMU_INTERACTIVE environment variable. 178identify_qemu_append () { 179 case "$1" in 180 qemu-system-x86_64|qemu-system-i386) 181 echo noapic selinux=0 initcall_debug debug 182 ;; 183 esac 184 if test -n "$TORTURE_QEMU_INTERACTIVE" 185 then 186 echo root=/dev/sda 187 else 188 echo console=ttyS0 189 fi 190} 191 192# identify_qemu_args qemu-cmd serial-file 193# 194# Output arguments for qemu arguments based on the TORTURE_QEMU_MAC 195# and TORTURE_QEMU_INTERACTIVE environment variables. 196identify_qemu_args () { 197 case "$1" in 198 qemu-system-x86_64|qemu-system-i386) 199 ;; 200 qemu-system-ppc64) 201 echo -enable-kvm -M pseries -nodefaults 202 echo -device spapr-vscsi 203 if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC" 204 then 205 echo -device spapr-vlan,netdev=net0,mac=$TORTURE_QEMU_MAC 206 echo -netdev bridge,br=br0,id=net0 207 elif test -n "$TORTURE_QEMU_INTERACTIVE" 208 then 209 echo -net nic -net user 210 fi 211 ;; 212 esac 213 if test -n "$TORTURE_QEMU_INTERACTIVE" 214 then 215 echo -monitor stdio -serial pty -S 216 else 217 echo -serial file:$2 218 fi 219} 220 221# identify_qemu_vcpus 222# 223# Returns the number of virtual CPUs available to the aggregate of the 224# guest OSes. 225identify_qemu_vcpus () { 226 lscpu | grep '^CPU(s):' | sed -e 's/CPU(s)://' 227} 228 229# print_bug 230# 231# Prints "BUG: " in red followed by remaining arguments 232print_bug () { 233 printf '\033[031mBUG: \033[m' 234 echo $* 235} 236 237# print_warning 238# 239# Prints "WARNING: " in yellow followed by remaining arguments 240print_warning () { 241 printf '\033[033mWARNING: \033[m' 242 echo $* 243} 244 245# specify_qemu_cpus qemu-cmd qemu-args #cpus 246# 247# Appends a string containing "-smp XXX" to qemu-args, unless the incoming 248# qemu-args already contains "-smp". 249specify_qemu_cpus () { 250 local nt; 251 252 if echo $2 | grep -q -e -smp 253 then 254 echo $2 255 else 256 case "$1" in 257 qemu-system-x86_64|qemu-system-i386) 258 echo $2 -smp $3 259 ;; 260 qemu-system-ppc64) 261 nt="`lscpu | grep '^NUMA node0' | sed -e 's/^[^,]*,\([0-9]*\),.*$/\1/'`" 262 echo $2 -smp cores=`expr \( $3 + $nt - 1 \) / $nt`,threads=$nt 263 ;; 264 esac 265 fi 266} 267