1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0+ 3# 4# Run SRCU-lockdep tests and report any that fail to meet expectations. 5# 6# Copyright (C) 2021 Meta Platforms, Inc. 7# 8# Authors: Paul E. McKenney <paulmck@kernel.org> 9 10usage () { 11 echo "Usage: $scriptname optional arguments:" 12 echo " --datestamp string" 13 exit 1 14} 15 16ds=`date +%Y.%m.%d-%H.%M.%S`-srcu_lockdep 17scriptname="$0" 18 19T="`mktemp -d ${TMPDIR-/tmp}/srcu_lockdep.sh.XXXXXX`" 20trap 'rm -rf $T' 0 21 22RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE 23PATH=${RCUTORTURE}/bin:$PATH; export PATH 24. functions.sh 25 26while test $# -gt 0 27do 28 case "$1" in 29 --datestamp) 30 checkarg --datestamp "(relative pathname)" "$#" "$2" '^[a-zA-Z0-9._/-]*$' '^--' 31 ds=$2 32 shift 33 ;; 34 *) 35 echo Unknown argument $1 36 usage 37 ;; 38 esac 39 shift 40done 41 42nerrs=0 43 44# Test lockdep's handling of deadlocks. 45for d in 0 1 46do 47 for t in 0 1 2 4 5 48 do 49 for c in 1 2 3 50 do 51 err= 52 val=$((d*1000+t*10+c)) 53 tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 5s --configs "SRCU-P" --kconfig "CONFIG_FORCE_NEED_SRCU_NMI_SAFE=y" --bootargs "rcutorture.test_srcu_lockdep=$val rcutorture.reader_flavor=0x4" --trust-make --datestamp "$ds/$val" > "$T/kvm.sh.out" 2>&1 54 ret=$? 55 mv "$T/kvm.sh.out" "$RCUTORTURE/res/$ds/$val" 56 if ! grep -q '^CONFIG_PROVE_LOCKING=y' .config 57 then 58 echo "rcu_torture_init_srcu_lockdep:Error: CONFIG_PROVE_LOCKING disabled in rcutorture SRCU-P scenario" 59 err=1 60 fi 61 if test "$d" -ne 0 && test "$ret" -eq 0 62 then 63 err=1 64 echo -n Unexpected success for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 65 fi 66 if test "$d" -eq 0 && test "$ret" -ne 0 67 then 68 err=1 69 echo -n Unexpected failure for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 70 fi 71 if test -n "$err" 72 then 73 grep "rcu_torture_init_srcu_lockdep: test_srcu_lockdep = " "$RCUTORTURE/res/$ds/$val/SRCU-P/console.log" | sed -e 's/^.*rcu_torture_init_srcu_lockdep://' >> "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 74 cat "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 75 nerrs=$((nerrs+1)) 76 fi 77 done 78 done 79done 80 81# Verify that synchronize_srcu_atomic() does not trigger lockdep 82# warnings when called inside rcu_read_lock(). 83for c in 1 2 3 84do 85 err= 86 val=$((6*10+c)) 87 tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 5s \ 88 --configs "SRCU-P" \ 89 --kconfig "CONFIG_FORCE_NEED_SRCU_NMI_SAFE=y" \ 90 --bootargs "rcutorture.test_srcu_lockdep=$val" \ 91 --trust-make --datestamp "$ds/$val" > "$T/kvm.sh.out" 2>&1 92 ret=$? 93 mv "$T/kvm.sh.out" "$RCUTORTURE/res/$ds/$val" 94 if ! grep -q '^CONFIG_PROVE_LOCKING=y' .config 95 then 96 echo "rcu_torture_init_srcu_lockdep:Error: CONFIG_PROVE_LOCKING" \ 97 "disabled in rcutorture SRCU-P scenario" 98 err=1 99 fi 100 if test "$ret" -ne 0 101 then 102 err=1 103 echo -n Unexpected failure for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 104 elif grep -qE "WARNING: possible (recursive locking|circular locking dependency)" \ 105 "$RCUTORTURE/res/$ds/$val/SRCU-P/console.log" 106 then 107 err=1 108 echo -n Unexpected lockdep warning for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 109 fi 110 if test -n "$err" 111 then 112 grep "rcu_torture_init_srcu_lockdep: test_srcu_lockdep = " "$RCUTORTURE/res/$ds/$val/SRCU-P/console.log" | sed -e 's/^.*rcu_torture_init_srcu_lockdep://' >> "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 113 cat "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 114 nerrs=$((nerrs+1)) 115 fi 116done 117 118# Verify that synchronize_srcu_atomic() detects IRQ context mismatch 119# when SRCU reader previously ran with IRQs enabled. 120for c in 1 2 3 121do 122 err= 123 val=$((1000+7*10+c)) 124 tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 5s \ 125 --configs "SRCU-P" \ 126 --kconfig "CONFIG_FORCE_NEED_SRCU_NMI_SAFE=y" \ 127 --bootargs "rcutorture.test_srcu_lockdep=$val" \ 128 --trust-make --datestamp "$ds/$val" > "$T/kvm.sh.out" 2>&1 129 ret=$? 130 mv "$T/kvm.sh.out" "$RCUTORTURE/res/$ds/$val" 131 if ! grep -q '^CONFIG_PROVE_LOCKING=y' .config 132 then 133 echo "rcu_torture_init_srcu_lockdep:Error: CONFIG_PROVE_LOCKING" \ 134 "disabled in rcutorture SRCU-P scenario" 135 err=1 136 fi 137 if test "$ret" -eq 0 138 then 139 err=1 140 echo -n Missing lockdep warning for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 141 elif ! grep -q "inconsistent {HARDIRQ-ON-R}" "$RCUTORTURE/res/$ds/$val/SRCU-P/console.log" 142 then 143 err=1 144 echo -n Missing lockdep warning for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 145 fi 146 if test -n "$err" 147 then 148 grep "rcu_torture_init_srcu_lockdep: test_srcu_lockdep = " "$RCUTORTURE/res/$ds/$val/SRCU-P/console.log" | sed -e 's/^.*rcu_torture_init_srcu_lockdep://' >> "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 149 cat "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 150 nerrs=$((nerrs+1)) 151 fi 152done 153 154# Test lockdep-enabled testing of mixed SRCU readers. 155for val in 0x1 0xf 156do 157 err= 158 tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 5s --configs "SRCU-P" --kconfig "CONFIG_FORCE_NEED_SRCU_NMI_SAFE=y" --bootargs "rcutorture.reader_flavor=$val" --trust-make --datestamp "$ds/$val" > "$T/kvm.sh.out" 2>&1 159 ret=$? 160 mv "$T/kvm.sh.out" "$RCUTORTURE/res/$ds/$val" 161 if ! grep -q '^CONFIG_PROVE_LOCKING=y' .config 162 then 163 echo "rcu_torture_init_srcu_lockdep:Error: CONFIG_PROVE_LOCKING disabled in rcutorture SRCU-P scenario" 164 err=1 165 fi 166 if test "$val" = 0xf && test "$ret" -eq 0 167 then 168 err=1 169 echo -n Unexpected success for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 170 fi 171 if test "$val" = 0x1 && test "$ret" -ne 0 172 then 173 err=1 174 echo -n Unexpected failure for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 175 fi 176 if test -n "$err" 177 then 178 grep "rcu_torture_init_srcu_lockdep: test_srcu_lockdep = " "$RCUTORTURE/res/$ds/$val/SRCU-P/console.log" | sed -e 's/^.*rcu_torture_init_srcu_lockdep://' >> "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 179 cat "$RCUTORTURE/res/$ds/$val/kvm.sh.err" 180 nerrs=$((nerrs+1)) 181 fi 182done 183 184# Set up exit code. 185if test "$nerrs" -ne 0 186then 187 exit 1 188fi 189exit 0 190