tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0+
3#
4# Transform a qemu-cmd file to allow reuse.
5#
6# Usage: kvm-transform.sh bzImage console.log jitter_dir seconds [ bootargs ] < qemu-cmd-in > qemu-cmd-out
7#
8# bzImage: Kernel and initrd from the same prior kvm.sh run.
9# console.log: File into which to place console output.
10# jitter_dir: Jitter directory for TORTURE_JITTER_START and
11# TORTURE_JITTER_STOP environment variables.
12# seconds: Run duaration for *.shutdown_secs module parameter.
13# bootargs: New kernel boot parameters. Beware of Robert Tables.
14#
15# The original qemu-cmd file is provided on standard input.
16# The transformed qemu-cmd file is on standard output.
17# The transformation assumes that the qemu command is confined to a
18# single line. It also assumes no whitespace in filenames.
19#
20# Copyright (C) 2020 Facebook, Inc.
21#
22# Authors: Paul E. McKenney <paulmck@kernel.org>
23
24T=`mktemp -d /tmp/kvm-transform.sh.XXXXXXXXXX`
25trap 'rm -rf $T' 0 2
26
27image="$1"
28if test -z "$image"
29then
30 echo Need kernel image file.
31 exit 1
32fi
33consolelog="$2"
34if test -z "$consolelog"
35then
36 echo "Need console log file name."
37 exit 1
38fi
39jitter_dir="$3"
40if test -z "$jitter_dir" || ! test -d "$jitter_dir"
41then
42 echo "Need valid jitter directory: '$jitter_dir'"
43 exit 1
44fi
45seconds="$4"
46if test -n "$seconds" && echo $seconds | grep -q '[^0-9]'
47then
48 echo "Invalid duration, should be numeric in seconds: '$seconds'"
49 exit 1
50fi
51bootargs="$5"
52
53# Build awk program.
54echo "BEGIN {" > $T/bootarg.awk
55echo $bootargs | tr -s ' ' '\012' |
56 awk -v dq='"' '/./ { print "\tbootarg[" NR "] = " dq $1 dq ";" }' >> $T/bootarg.awk
57echo $bootargs | tr -s ' ' '\012' | sed -e 's/=.*$//' |
58 awk -v dq='"' '/./ { print "\tbootpar[" NR "] = " dq $1 dq ";" }' >> $T/bootarg.awk
59cat >> $T/bootarg.awk << '___EOF___'
60}
61
62/^# seconds=/ {
63 if (seconds == "")
64 print $0;
65 else
66 print "# seconds=" seconds;
67 next;
68}
69
70/^# TORTURE_JITTER_START=/ {
71 print "# TORTURE_JITTER_START=\". jitterstart.sh " $4 " " jitter_dir " " $6 " " $7;
72 next;
73}
74
75/^# TORTURE_JITTER_STOP=/ {
76 print "# TORTURE_JITTER_STOP=\". jitterstop.sh " " " jitter_dir " " $5;
77 next;
78}
79
80/^#/ {
81 print $0;
82 next;
83}
84
85{
86 line = "";
87 for (i = 1; i <= NF; i++) {
88 if (line == "") {
89 line = $i;
90 } else {
91 line = line " " $i;
92 }
93 if ($i == "-serial") {
94 i++;
95 line = line " file:" consolelog;
96 } else if ($i == "-kernel") {
97 i++;
98 line = line " " image;
99 } else if ($i == "-append") {
100 for (i++; i <= NF; i++) {
101 arg = $i;
102 lq = "";
103 rq = "";
104 if ("" seconds != "" && $i ~ /\.shutdown_secs=[0-9]*$/)
105 sub(/[0-9]*$/, seconds, arg);
106 if (arg ~ /^"/) {
107 lq = substr(arg, 1, 1);
108 arg = substr(arg, 2);
109 }
110 if (arg ~ /"$/) {
111 rq = substr(arg, length($i), 1);
112 arg = substr(arg, 1, length($i) - 1);
113 }
114 par = arg;
115 gsub(/=.*$/, "", par);
116 j = 1;
117 while (bootpar[j] != "") {
118 if (bootpar[j] == par) {
119 arg = "";
120 break;
121 }
122 j++;
123 }
124 if (line == "")
125 line = lq arg;
126 else
127 line = line " " lq arg;
128 }
129 for (j in bootarg)
130 line = line " " bootarg[j];
131 line = line rq;
132 }
133 }
134 print line;
135}
136___EOF___
137
138awk -v image="$image" -v consolelog="$consolelog" -v jitter_dir="$jitter_dir" \
139 -v seconds="$seconds" -f $T/bootarg.awk