1 files changed, 139 insertions, 0 deletions
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-transform.sh b/tools/testing/selftests/rcutorture/bin/kvm-transform.sh
new file mode 100755
index 000000000000..75a2610a27f3
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-transform.sh
@@ -0,0 +1,139 @@
+#!/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