tools/testing/selftests/rcutorture/bin/functions.sh

   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.
  27 bootparam_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.
  35 checkarg () {
  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.
  58 configfrag_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 maxcpus= boot parameters specified.
  70 configfrag_boot_cpus () {
  71         local bootargs="`configfrag_boot_params "$1" "$2"`"
  72         local maxcpus
  73         if echo "${bootargs}" | grep -q 'maxcpus=[0-9]'
  74         then
  75                 maxcpus="`echo "${bootargs}" | sed -e 's/^.*maxcpus=\([0-9]*\).*$/\1/'`"
  76                 if test "$3" -gt "$maxcpus"
  77                 then
  78                         echo $maxcpus
  79                 else
  80                         echo $3
  81                 fi
  82         else
  83                 echo $3
  84         fi
  85 }
  86
  87 # configfrag_hotplug_cpu config-fragment-file
  88 #
  89 # Returns 1 if the config fragment specifies hotplug CPU.
  90 configfrag_hotplug_cpu () {
  91         if test ! -r "$1"
  92         then
  93                 echo Unreadable config fragment "$1" 1>&2
  94                 exit -1
  95         fi
  96         grep -q '^CONFIG_HOTPLUG_CPU=y$' "$1"
  97 }
  98
  99 # identify_boot_image qemu-cmd
 100 #
 101 # Returns the relative path to the kernel build image.  This will be
 102 # arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the
 103 # architecture, unless overridden with the TORTURE_BOOT_IMAGE environment
 104 # variable.
 105 identify_boot_image () {
 106         if test -n "$TORTURE_BOOT_IMAGE"
 107         then
 108                 echo $TORTURE_BOOT_IMAGE
 109         else
 110                 case "$1" in
 111                 qemu-system-x86_64|qemu-system-i386)
 112                         echo arch/x86/boot/bzImage
 113                         ;;
 114                 *)
 115                         echo vmlinux
 116                         ;;
 117                 esac
 118         fi
 119 }
 120
 121 # identify_qemu builddir
 122 #
 123 # Returns our best guess as to which qemu command is appropriate for
 124 # the kernel at hand.  Override with the TORTURE_QEMU_CMD environment variable.
 125 identify_qemu () {
 126         local u="`file "$1"`"
 127         if test -n "$TORTURE_QEMU_CMD"
 128         then
 129                 echo $TORTURE_QEMU_CMD
 130         elif echo $u | grep -q x86-64
 131         then
 132                 echo qemu-system-x86_64
 133         elif echo $u | grep -q "Intel 80386"
 134         then
 135                 echo qemu-system-i386
 136         elif uname -a | grep -q ppc64
 137         then
 138                 echo qemu-system-ppc64
 139         else
 140                 echo Cannot figure out what qemu command to use! 1>&2
 141                 echo file $1 output: $u
 142                 # Usually this will be one of /usr/bin/qemu-system-*
 143                 # Use TORTURE_QEMU_CMD environment variable or appropriate
 144                 # argument to top-level script.
 145                 exit 1
 146         fi
 147 }
 148
 149 # identify_qemu_append qemu-cmd
 150 #
 151 # Output arguments for the qemu "-append" string based on CPU type
 152 # and the TORTURE_QEMU_INTERACTIVE environment variable.
 153 identify_qemu_append () {
 154         case "$1" in
 155         qemu-system-x86_64|qemu-system-i386)
 156                 echo noapic selinux=0 initcall_debug debug
 157                 ;;
 158         esac
 159         if test -n "$TORTURE_QEMU_INTERACTIVE"
 160         then
 161                 echo root=/dev/sda
 162         else
 163                 echo console=ttyS0
 164         fi
 165 }
 166
 167 # identify_qemu_args qemu-cmd serial-file
 168 #
 169 # Output arguments for qemu arguments based on the TORTURE_QEMU_MAC
 170 # and TORTURE_QEMU_INTERACTIVE environment variables.
 171 identify_qemu_args () {
 172         case "$1" in
 173         qemu-system-x86_64|qemu-system-i386)
 174                 ;;
 175         qemu-system-ppc64)
 176                 echo -enable-kvm -M pseries -nodefaults
 177                 echo -device spapr-vscsi
 178                 if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC"
 179                 then
 180                         echo -device spapr-vlan,netdev=net0,mac=$TORTURE_QEMU_MAC
 181                         echo -netdev bridge,br=br0,id=net0
 182                 elif test -n "$TORTURE_QEMU_INTERACTIVE"
 183                 then
 184                         echo -net nic -net user
 185                 fi
 186                 ;;
 187         esac
 188         if test -n "$TORTURE_QEMU_INTERACTIVE"
 189         then
 190                 echo -monitor stdio -serial pty -S
 191         else
 192                 echo -serial file:$2
 193         fi
 194 }
 195
 196 # identify_qemu_vcpus
 197 #
 198 # Returns the number of virtual CPUs available to the aggregate of the
 199 # guest OSes.
 200 identify_qemu_vcpus () {
 201         lscpu | grep '^CPU(s):' | sed -e 's/CPU(s)://'
 202 }
 203
 204 # print_bug
 205 #
 206 # Prints "BUG: " in red followed by remaining arguments
 207 print_bug () {
 208         printf '\033[031mBUG: \033[m'
 209         echo $*
 210 }
 211
 212 # print_warning
 213 #
 214 # Prints "WARNING: " in yellow followed by remaining arguments
 215 print_warning () {
 216         printf '\033[033mWARNING: \033[m'
 217         echo $*
 218 }
 219
 220 # specify_qemu_cpus qemu-cmd qemu-args #cpus
 221 #
 222 # Appends a string containing "-smp XXX" to qemu-args, unless the incoming
 223 # qemu-args already contains "-smp".
 224 specify_qemu_cpus () {
 225         local nt;
 226
 227         if echo $2 | grep -q -e -smp
 228         then
 229                 echo $2
 230         else
 231                 case "$1" in
 232                 qemu-system-x86_64|qemu-system-i386)
 233                         echo $2 -smp $3
 234                         ;;
 235                 qemu-system-ppc64)
 236                         nt="`lscpu | grep '^NUMA node0' | sed -e 's/^[^,]*,\([0-9]*\),.*$/\1/'`"
 237                         echo $2 -smp cores=`expr \( $3 + $nt - 1 \) / $nt`,threads=$nt
 238                         ;;
 239                 esac
 240         fi
 241 }