57 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.03# Copyright (C) 2023 SUSE4# Author: Marcos Paulo de Souza <mpdesouza@suse.com>5 6. $(dirname $0)/functions.sh7 8MOD_SYSCALL=test_klp_syscall9 10setup_config11 12# - Start _NRPROC processes calling getpid and load a livepatch to patch the13# getpid syscall. Check if all the processes transitioned to the livepatched14# state.15 16start_test "patch getpid syscall while being heavily hammered"17 18NPROC=$(getconf _NPROCESSORS_ONLN)19MAXPROC=12820 21for i in $(seq 1 $(($NPROC < $MAXPROC ? $NPROC : $MAXPROC))); do22 ./test_klp-call_getpid &23 pids[$i]="$!"24done25 26pid_list=$(echo ${pids[@]} | tr ' ' ',')27load_lp $MOD_SYSCALL klp_pids=$pid_list28 29# wait for all tasks to transition to patched state30loop_until 'grep -q '^0$' /sys/kernel/test_klp_syscall/npids'31 32pending_pids=$(cat /sys/kernel/test_klp_syscall/npids)33log "$MOD_SYSCALL: Remaining not livepatched processes: $pending_pids"34 35for pid in ${pids[@]}; do36 kill $pid || true37done38 39disable_lp $MOD_SYSCALL40unload_lp $MOD_SYSCALL41 42check_result "% insmod test_modules/$MOD_SYSCALL.ko klp_pids=$pid_list43livepatch: enabling patch '$MOD_SYSCALL'44livepatch: '$MOD_SYSCALL': initializing patching transition45livepatch: '$MOD_SYSCALL': starting patching transition46livepatch: '$MOD_SYSCALL': completing patching transition47livepatch: '$MOD_SYSCALL': patching complete48$MOD_SYSCALL: Remaining not livepatched processes: 049% echo 0 > /sys/kernel/livepatch/$MOD_SYSCALL/enabled50livepatch: '$MOD_SYSCALL': initializing unpatching transition51livepatch: '$MOD_SYSCALL': starting unpatching transition52livepatch: '$MOD_SYSCALL': completing unpatching transition53livepatch: '$MOD_SYSCALL': unpatching complete54% rmmod $MOD_SYSCALL"55 56exit 057