140 lines
3.2 KiB
Bash
140 lines
3.2 KiB
Bash
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Transform a qemu-cmd file to allow reuse.
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#
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# Usage: kvm-transform.sh bzImage console.log jitter_dir seconds [ bootargs ] < qemu-cmd-in > qemu-cmd-out
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#
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# bzImage: Kernel and initrd from the same prior kvm.sh run.
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# console.log: File into which to place console output.
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# jitter_dir: Jitter directory for TORTURE_JITTER_START and
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# TORTURE_JITTER_STOP environment variables.
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# seconds: Run duaration for *.shutdown_secs module parameter.
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# bootargs: New kernel boot parameters. Beware of Robert Tables.
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#
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# The original qemu-cmd file is provided on standard input.
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# The transformed qemu-cmd file is on standard output.
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# The transformation assumes that the qemu command is confined to a
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# single line. It also assumes no whitespace in filenames.
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#
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# Copyright (C) 2020 Facebook, Inc.
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#
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# Authors: Paul E. McKenney <paulmck@kernel.org>
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T=`mktemp -d /tmp/kvm-transform.sh.XXXXXXXXXX`
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trap 'rm -rf $T' 0 2
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image="$1"
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if test -z "$image"
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then
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echo Need kernel image file.
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exit 1
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fi
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consolelog="$2"
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if test -z "$consolelog"
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then
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echo "Need console log file name."
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exit 1
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fi
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jitter_dir="$3"
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if test -z "$jitter_dir" || ! test -d "$jitter_dir"
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then
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echo "Need valid jitter directory: '$jitter_dir'"
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exit 1
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fi
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seconds="$4"
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if test -n "$seconds" && echo $seconds | grep -q '[^0-9]'
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then
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echo "Invalid duration, should be numeric in seconds: '$seconds'"
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exit 1
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fi
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bootargs="$5"
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# Build awk program.
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echo "BEGIN {" > $T/bootarg.awk
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echo $bootargs | tr -s ' ' '\012' |
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awk -v dq='"' '/./ { print "\tbootarg[" NR "] = " dq $1 dq ";" }' >> $T/bootarg.awk
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echo $bootargs | tr -s ' ' '\012' | sed -e 's/=.*$//' |
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awk -v dq='"' '/./ { print "\tbootpar[" NR "] = " dq $1 dq ";" }' >> $T/bootarg.awk
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cat >> $T/bootarg.awk << '___EOF___'
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}
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/^# seconds=/ {
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if (seconds == "")
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print $0;
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else
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print "# seconds=" seconds;
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next;
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}
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/^# TORTURE_JITTER_START=/ {
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print "# TORTURE_JITTER_START=\". jitterstart.sh " $4 " " jitter_dir " " $6 " " $7;
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next;
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}
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/^# TORTURE_JITTER_STOP=/ {
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print "# TORTURE_JITTER_STOP=\". jitterstop.sh " " " jitter_dir " " $5;
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next;
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}
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/^#/ {
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print $0;
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next;
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}
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{
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line = "";
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for (i = 1; i <= NF; i++) {
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if (line == "") {
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line = $i;
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} else {
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line = line " " $i;
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}
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if ($i == "-serial") {
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i++;
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line = line " file:" consolelog;
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} else if ($i == "-kernel") {
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i++;
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line = line " " image;
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} else if ($i == "-append") {
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for (i++; i <= NF; i++) {
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arg = $i;
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lq = "";
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rq = "";
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if ("" seconds != "" && $i ~ /\.shutdown_secs=[0-9]*$/)
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sub(/[0-9]*$/, seconds, arg);
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if (arg ~ /^"/) {
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lq = substr(arg, 1, 1);
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arg = substr(arg, 2);
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}
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if (arg ~ /"$/) {
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rq = substr(arg, length($i), 1);
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arg = substr(arg, 1, length($i) - 1);
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}
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par = arg;
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gsub(/=.*$/, "", par);
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j = 1;
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while (bootpar[j] != "") {
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if (bootpar[j] == par) {
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arg = "";
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break;
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}
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j++;
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}
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if (line == "")
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line = lq arg;
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else
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line = line " " lq arg;
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}
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for (j in bootarg)
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line = line " " bootarg[j];
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line = line rq;
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}
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}
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print line;
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}
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___EOF___
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awk -v image="$image" -v consolelog="$consolelog" -v jitter_dir="$jitter_dir" \
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-v seconds="$seconds" -f $T/bootarg.awk
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