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
24 T=`mktemp -d /tmp/kvm-transform.sh.XXXXXXXXXX`
25 trap 'rm -rf $T' 0 2
26
27 image="$1"
28 if test -z "$image"
29 then
30 echo Need kernel image file.
31 exit 1
32 fi
33 consolelog="$2"
34 if test -z "$consolelog"
35 then
36 echo "Need console log file name."
37 exit 1
38 fi
39 jitter_dir="$3"
40 if test -z "$jitter_dir" || ! test -d "$jitter_dir"
41 then
42 echo "Need valid jitter directory: '$jitter_dir'"
43 exit 1
44 fi
45 seconds="$4"
46 if test -n "$seconds" && echo $seconds | grep -q '[^0-9]'
47 then
48 echo "Invalid duration, should be numeric in seconds: '$seconds'"
49 exit 1
50 fi
51 bootargs="$5"
52
53 # Build awk program.
54 echo "BEGIN {" > $T/bootarg.awk
55 echo $bootargs | tr -s ' ' '\012' |
56 awk -v dq='"' '/./ { print "\tbootarg[" NR "] = " dq $1 dq ";" }' >> $T/bootarg.awk
57 echo $bootargs | tr -s ' ' '\012' | sed -e 's/=.*$//' |
58 awk -v dq='"' '/./ { print "\tbootpar[" NR "] = " dq $1 dq ";" }' >> $T/bootarg.awk
59 cat >> $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(/=.*$/, "", par);
116 j = 1;
117 while (bootpar[j] != "") {
118 if (bootpar[j] == par) {
119 arg = "";
120 break;
121 }
122 j++;
123 }
124 if (line == "")
125 line = lq arg;
126 else
127 line = line " " lq arg;
128 }
129 for (j in bootarg)
130 line = line " " bootarg[j];
131 line = line rq;
132 }
133 }
134 print line;
135 }
136 ___EOF___
137
138 awk -v image="$image" -v consolelog="$consolelog" -v jitter_dir="$jitter_dir" \
139 -v seconds="$seconds" -f $T/bootarg.awk
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