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