1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0+
3#
4# Rerun a series of tests under KVM.
5#
6# Usage: kvm-again.sh /path/to/old/run [ options ]
7#
8# Copyright (C) 2021 Facebook, Inc.
9#
10# Authors: Paul E. McKenney <paulmck@kernel.org>
11
12scriptname=$0
13args="$*"
14
15T="`mktemp -d ${TMPDIR-/tmp}/kvm-again.sh.XXXXXX`"
16trap 'rm -rf $T' 0
17
18if ! test -d tools/testing/selftests/rcutorture/bin
19then
20	echo $scriptname must be run from top-level directory of kernel source tree.
21	exit 1
22fi
23
24oldrun=$1
25shift
26if ! test -d "$oldrun"
27then
28	echo "Usage: $scriptname /path/to/old/run [ options ]"
29	exit 1
30fi
31if ! cp "$oldrun/scenarios" $T/scenarios.oldrun
32then
33	# Later on, can reconstitute this from console.log files.
34	echo Prior run batches file does not exist: $oldrun/batches
35	exit 1
36fi
37
38if test -f "$oldrun/torture_suite"
39then
40	torture_suite="`cat $oldrun/torture_suite`"
41elif test -f "$oldrun/TORTURE_SUITE"
42then
43	torture_suite="`cat $oldrun/TORTURE_SUITE`"
44else
45	echo "Prior run torture_suite file does not exist: $oldrun/{torture_suite,TORTURE_SUITE}"
46	exit 1
47fi
48
49RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
50PATH=${RCUTORTURE}/bin:$PATH; export PATH
51. functions.sh
52
53bootargs=
54dryrun=
55dur=
56default_link="cp -R"
57resdir="`pwd`/tools/testing/selftests/rcutorture/res"
58rundir="$resdir/`date +%Y.%m.%d-%H.%M.%S-again`"
59got_datestamp=
60got_rundir=
61
62startdate="`date`"
63starttime="`get_starttime`"
64
65usage () {
66	echo "Usage: $scriptname $oldrun [ arguments ]:"
67	echo "       --bootargs kernel-boot-arguments"
68	echo "       --datestamp string"
69	echo "       --dryrun"
70	echo "       --duration minutes | <seconds>s | <hours>h | <days>d"
71	echo "       --link hard|soft|copy"
72	echo "       --remote"
73	echo "       --rundir /new/res/path"
74	echo "Command line: $scriptname $args"
75	exit 1
76}
77
78while test $# -gt 0
79do
80	case "$1" in
81	--bootargs|--bootarg)
82		checkarg --bootargs "(list of kernel boot arguments)" "$#" "$2" '.*' '^--'
83		bootargs="$bootargs $2"
84		shift
85		;;
86	--datestamp)
87		checkarg --datestamp "(relative pathname)" "$#" "$2" '^[a-zA-Z0-9._/-]*$' '^--'
88		if test -n "$got_rundir" || test -n "$got_datestamp"
89		then
90			echo Only one of --datestamp or --rundir may be specified
91			usage
92		fi
93		got_datestamp=y
94		ds=$2
95		rundir="$resdir/$ds"
96		if test -e "$rundir"
97		then
98			echo "--datestamp $2: Already exists."
99			usage
100		fi
101		shift
102		;;
103	--dryrun)
104		dryrun=1
105		;;
106	--duration)
107		checkarg --duration "(minutes)" $# "$2" '^[0-9][0-9]*\(s\|m\|h\|d\|\)$' '^error'
108		mult=60
109		if echo "$2" | grep -q 's$'
110		then
111			mult=1
112		elif echo "$2" | grep -q 'h$'
113		then
114			mult=3600
115		elif echo "$2" | grep -q 'd$'
116		then
117			mult=86400
118		fi
119		ts=`echo $2 | sed -e 's/[smhd]$//'`
120		dur=$(($ts*mult))
121		shift
122		;;
123	--link)
124		checkarg --link "hard|soft|copy" "$#" "$2" 'hard\|soft\|copy' '^--'
125		case "$2" in
126		copy)
127			arg_link="cp -R"
128			;;
129		hard)
130			arg_link="cp -Rl"
131			;;
132		soft)
133			arg_link="cp -Rs"
134			;;
135		esac
136		shift
137		;;
138	--remote)
139		arg_remote=1
140		default_link="cp -as"
141		;;
142	--rundir)
143		checkarg --rundir "(absolute pathname)" "$#" "$2" '^/' '^error'
144		if test -n "$got_rundir" || test -n "$got_datestamp"
145		then
146			echo Only one of --datestamp or --rundir may be specified
147			usage
148		fi
149		got_rundir=y
150		rundir=$2
151		if test -e "$rundir"
152		then
153			echo "--rundir $2: Already exists."
154			usage
155		fi
156		shift
157		;;
158	*)
159		if test -n "$1"
160		then
161			echo Unknown argument $1
162			usage
163		fi
164		;;
165	esac
166	shift
167done
168if test -z "$arg_link"
169then
170	arg_link="$default_link"
171fi
172
173echo ---- Re-run results directory: $rundir
174
175# Copy old run directory tree over and adjust.
176mkdir -p "`dirname "$rundir"`"
177if ! $arg_link "$oldrun" "$rundir"
178then
179	echo "Cannot copy from $oldrun to $rundir."
180	usage
181fi
182rm -f "$rundir"/*/{console.log,console.log.diags,qemu_pid,qemu-pid,qemu-retval,Warnings,kvm-test-1-run.sh.out,kvm-test-1-run-qemu.sh.out,vmlinux} "$rundir"/log
183touch "$rundir/log"
184echo $scriptname $args | tee -a "$rundir/log"
185echo $oldrun > "$rundir/re-run"
186if ! test -d "$rundir/../../bin"
187then
188	$arg_link "$oldrun/../../bin" "$rundir/../.."
189fi
190for i in $rundir/*/qemu-cmd
191do
192	cp "$i" $T
193	qemu_cmd_dir="`dirname "$i"`"
194	kernel_dir="`echo $qemu_cmd_dir | sed -e 's/\.[0-9]\+$//'`"
195	jitter_dir="`dirname "$kernel_dir"`"
196	kvm-transform.sh "$kernel_dir/bzImage" "$qemu_cmd_dir/console.log" "$jitter_dir" "$dur" "$bootargs" < $T/qemu-cmd > $i
197	if test -n "$arg_remote"
198	then
199		echo "# TORTURE_KCONFIG_GDB_ARG=''" >> $i
200	fi
201done
202
203# Extract settings from the last qemu-cmd file transformed above.
204grep '^#' $i | sed -e 's/^# //' > $T/qemu-cmd-settings
205. $T/qemu-cmd-settings
206
207grep -v '^#' $T/scenarios.oldrun | awk '
208{
209	curbatch = "";
210	for (i = 2; i <= NF; i++)
211		curbatch = curbatch " " $i;
212	print "kvm-test-1-run-batch.sh" curbatch;
213}' > $T/runbatches.sh
214
215if test -n "$dryrun"
216then
217	echo ---- Dryrun complete, directory: $rundir | tee -a "$rundir/log"
218else
219	( cd "$rundir"; sh $T/runbatches.sh ) | tee -a "$rundir/log"
220	kvm-end-run-stats.sh "$rundir" "$starttime"
221fi
222