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[/] [openrisc/] [trunk/] [gnu-stable/] [start-linuxes.sh] - Rev 852
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#!/bin/bash # Copyright (C) 2011 Embecosm Limited # Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> # This file is a script to start up a group of Linux instances # This program is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the Free # Software Foundation; either version 3 of the License, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for # more details. # You should have received a copy of the GNU General Public License along # with this program. If not, see <http://www.gnu.org/licenses/>. # ------------------------------------------------------------------------------ # Start up a batch of linux sessions ready for testing. # There are a number of ways of starting up vmlinux to force a particular IP # address to be used, which are specified by the first argument # DHCP - Linux will get an IP address via DHCP. In this case we must poll # the router to get the newly created IP address. # STATIC - We force Linux to chose a static address, by an explicit ifconfig # in the etc/init.d/rcS of the initramfs. We need to select an IP # address that is not currently being used. # In both cases, potentially we get in a mess if someone else is starting up # sessions at this time. # ------------------------------------------------------------------------------ # Tell the user how to use this command # If we are doing STATIC startup, the <count> must be followed by <count> IP # addresses. # ------------------------------------------------------------------------------ function bad_args { echo "Usage: start-linuxes.sh DHCP|STATIC <count> <dir> [ <ip> <ip> ... ]" echo " <count> - Number of Linux sessions to start up" echo " <dir> - Linux directory" echo " <ip> - IP addresses (only if STATIC)" } # ------------------------------------------------------------------------------ # Check the args # Remote machine name is optional. For argument usage, see function bad_args. # @param[in] $1 Type of processing (DHCP or STATIC) # @pmara[in] $2 Count of Linux instances to start # @param[in] $3 Linux directory # @param[in] $4 ... IP addresses if static startup # ------------------------------------------------------------------------------ function get_args { # Check We have at least the first two arguments if [ $# -lt 3 ] then bad_args exit 1 fi type=$1 shift count=$1 shift linux_dir=$1 shift # Check type and get static IP addresses case "x${type}" in "xSTATIC" ) # Get all the IP addresses for (( i=0 ; i < ${count} ; i++ )) do if [ "x${i}" == "x" ] then bad_args exit 1 fi ip_list[${i}]=$1 shift done ;; "xDHCP" ) # No extra args for DHCP ;; "x*" ) # Not recognized bad_args exit 1 ;; esac } # ------------------------------------------------------------------------------ # Allocate an unused TAP device # We need /dev/tap?? that is not being used at present. We have a custom # program to do this. # @return The TAP to use. # ------------------------------------------------------------------------------ function allocate_tap { for (( i=0 ; ${i} < 20 ; i=${i} + 1 )) do if ./check-tap "tap${i}" then echo "tap${i}" exit fi done } # ------------------------------------------------------------------------------ # Start up one STATIC instance # We need to edit the IP address into rcS, rebuild Linux and start Linux using # the next available TAP. # This could go wrong if someone else starts up a machine at the same time. We # could reserve an unlikely block to avoid this, and flock this code, to avoid # another instance causing trouble. For now we leave it unprotected. # @param[in] $1 An index number of this instance # @param[in] $2 The IP address to use # @return The Linux process ID # ------------------------------------------------------------------------------ function start_one_static { ip=$2 # A new Linux instance will require a new TAP in its config tap=`allocate_tap $*` # Edit the Or1ksim configuration file to use the allocated TAP sed -i -e "s/^\( *tap_dev *= *\).*$/\1\"$tap\"/" \ ${linux_dir}/arch/openrisc/or1ksim_eth.cfg # Edit the Linux rcS file and rebuild sed -i -e "s/ifconfig eth0.*up/ifconfig eth0 ${ip} up/" \ ${linux_dir}/arch/openrisc/support/initramfs/etc/init.d/rcS cd ${linux_dir} make vmlinux ARCH=openrisc CROSS_COMPILE=/opt/or32-new/bin/or32-elf- \ > /dev/null 2>&1 if [ $? != 0 ]; then echo "start-linux.sh: 'make vmlinux' failed" exit 1 fi cd - > /dev/null 2>&1 # Start up Linux and allow time for the ramdisk to unpack, by waiting # until ping to the IP address is OK. or32-elf-sim -f ${linux_dir}/arch/openrisc/or1ksim_eth.cfg \ ${linux_dir}/vmlinux \ > `hostname`-linux-console-$$-$1.log 2>&1 & linux_pid=$! until ping -c 1 -q ${ip} > /dev/null 2>&1 do sleep 1 done # make us nicer than normal, then return the new process ID renice +1 ${linux_pid} > /dev/null 2>&1 echo "${linux_pid}" } # ------------------------------------------------------------------------------ # Start up one DHCP instance # Start up Linux using the next available TAP. # @param[in] $1 An index number of this instance # @return The Linux process ID # ------------------------------------------------------------------------------ function start_one_dhcp { # A new Linux instance will require a new TAP in its config tap=`allocate_tap $*` # Edit the Or1ksim configuration file to use the allocated TAP sed -i -e "s/^\( *tap_dev *= *\).*$/\1\"$tap\"/" \ ${linux_dir}/arch/openrisc/or1ksim_eth.cfg # Start up Linux or32-elf-sim -f ${linux_dir}/arch/openrisc/or1ksim_eth.cfg \ ${linux_dir}/vmlinux > `hostname`-linux-output-$$-$1 2>&1 & linux_pid=$! # make us nicer than normal, then return the new process ID renice +1 ${linux_pid} > /dev/null 2>&1 echo "${linux_pid}" } # ------------------------------------------------------------------------------ # Start up using DHCP on the local machine # We wait for 30 seconds between each Linux startup, to avoid flooding the # DHCP server. # @return A list of IP address of the Linux instances # ------------------------------------------------------------------------------ function start_all_dhcp { echo "DHCP startup in progress..." for (( i=0 ; ${i} < ${count} ; i=${i} + 1 )) do one_res=`start_one_dhcp ${i}` res="${res} ${one_res}" sleep 30 done echo ${res} } # ------------------------------------------------------------------------------ # Start up using STATIC on the local machine # ------------------------------------------------------------------------------ function start_all_static { echo "STATIC startup in progress..." for (( i=0 ; ${i} < ${count} ; i=${i} + 1 )) do one_res=`start_one_static ${i} ${ip_list[${i}]}` res="${res} ${one_res}" done echo ${res} } # ------------------------------------------------------------------------------ # Main program # ------------------------------------------------------------------------------ # Some useful files tmp1=/tmp/start-linuxes-1-$$ tmp2=/tmp/start-linuxes-2-$$ # Check the arguments get_args $* # Start Linuxes case "${type}" in "DHCP" ) start_all_dhcp ;; "STATIC" ) start_all_static ;; "*" ) echo "Abort at line ${LINENO} in ${BASH_SOURCE[0]}" exit 255 ;; esac
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