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 qemu-system-aarch64) 140 echo arch/arm64/boot/Image 141 ;; 142 *) 143 echo vmlinux 144 ;; 145 esac 146 fi 147} 148 149# identify_qemu builddir 150# 151# Returns our best guess as to which qemu command is appropriate for 152# the kernel at hand. Override with the TORTURE_QEMU_CMD environment variable. 153identify_qemu () { 154 local u="`file "$1"`" 155 if test -n "$TORTURE_QEMU_CMD" 156 then 157 echo $TORTURE_QEMU_CMD 158 elif echo $u | grep -q x86-64 159 then 160 echo qemu-system-x86_64 161 elif echo $u | grep -q "Intel 80386" 162 then 163 echo qemu-system-i386 164 elif echo $u | grep -q aarch64 165 then 166 echo qemu-system-aarch64 167 elif uname -a | grep -q ppc64 168 then 169 echo qemu-system-ppc64 170 else 171 echo Cannot figure out what qemu command to use! 1>&2 172 echo file $1 output: $u 173 # Usually this will be one of /usr/bin/qemu-system-* 174 # Use TORTURE_QEMU_CMD environment variable or appropriate 175 # argument to top-level script. 176 exit 1 177 fi 178} 179 180# identify_qemu_append qemu-cmd 181# 182# Output arguments for the qemu "-append" string based on CPU type 183# and the TORTURE_QEMU_INTERACTIVE environment variable. 184identify_qemu_append () { 185 local console=ttyS0 186 case "$1" in 187 qemu-system-x86_64|qemu-system-i386) 188 echo noapic selinux=0 initcall_debug debug 189 ;; 190 qemu-system-aarch64) 191 console=ttyAMA0 192 ;; 193 esac 194 if test -n "$TORTURE_QEMU_INTERACTIVE" 195 then 196 echo root=/dev/sda 197 else 198 echo console=$console 199 fi 200} 201 202# identify_qemu_args qemu-cmd serial-file 203# 204# Output arguments for qemu arguments based on the TORTURE_QEMU_MAC 205# and TORTURE_QEMU_INTERACTIVE environment variables. 206identify_qemu_args () { 207 case "$1" in 208 qemu-system-x86_64|qemu-system-i386) 209 ;; 210 qemu-system-aarch64) 211 echo -machine virt,gic-version=host -cpu host 212 ;; 213 qemu-system-ppc64) 214 echo -enable-kvm -M pseries -nodefaults 215 echo -device spapr-vscsi 216 if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC" 217 then 218 echo -device spapr-vlan,netdev=net0,mac=$TORTURE_QEMU_MAC 219 echo -netdev bridge,br=br0,id=net0 220 elif test -n "$TORTURE_QEMU_INTERACTIVE" 221 then 222 echo -net nic -net user 223 fi 224 ;; 225 esac 226 if test -n "$TORTURE_QEMU_INTERACTIVE" 227 then 228 echo -monitor stdio -serial pty -S 229 else 230 echo -serial file:$2 231 fi 232} 233 234# identify_qemu_vcpus 235# 236# Returns the number of virtual CPUs available to the aggregate of the 237# guest OSes. 238identify_qemu_vcpus () { 239 lscpu | grep '^CPU(s):' | sed -e 's/CPU(s)://' 240} 241 242# print_bug 243# 244# Prints "BUG: " in red followed by remaining arguments 245print_bug () { 246 printf '\033[031mBUG: \033[m' 247 echo $* 248} 249 250# print_warning 251# 252# Prints "WARNING: " in yellow followed by remaining arguments 253print_warning () { 254 printf '\033[033mWARNING: \033[m' 255 echo $* 256} 257 258# specify_qemu_cpus qemu-cmd qemu-args #cpus 259# 260# Appends a string containing "-smp XXX" to qemu-args, unless the incoming 261# qemu-args already contains "-smp". 262specify_qemu_cpus () { 263 local nt; 264 265 if echo $2 | grep -q -e -smp 266 then 267 echo $2 268 else 269 case "$1" in 270 qemu-system-x86_64|qemu-system-i386|qemu-system-aarch64) 271 echo $2 -smp $3 272 ;; 273 qemu-system-ppc64) 274 nt="`lscpu | grep '^NUMA node0' | sed -e 's/^[^,]*,\([0-9]*\),.*$/\1/'`" 275 echo $2 -smp cores=`expr \( $3 + $nt - 1 \) / $nt`,threads=$nt 276 ;; 277 esac 278 fi 279} 280