#!/bin/bash# SPDX-License-Identifier: GPL-2.0# Copyright (C) 2023 SUSE# Author: Marcos Paulo de Souza <mpdesouza@suse.com> . $(dirname $0)/functions.sh MOD_SYSCALL=test_klp_syscall setup_config # - Start _NRPROC processes calling getpid and load a livepatch to patch the#   getpid syscall. Check if all the processes transitioned to the livepatched#   state. start_test "patch getpid syscall while being heavily hammered" NPROC=$(getconf _NPROCESSORS_ONLN)MAXPROC=128 for i in $(seq 1 $(($NPROC < $MAXPROC ? $NPROC : $MAXPROC))); do	./test_klp-call_getpid &	pids[$i]="$!"done pid_list=$(echo ${pids[@]} | tr ' ' ',')load_lp $MOD_SYSCALL klp_pids=$pid_list # wait for all tasks to transition to patched stateloop_until 'grep -q '^0$' $SYSFS_KERNEL_DIR/$MOD_SYSCALL/npids' pending_pids=$(cat $SYSFS_KERNEL_DIR/$MOD_SYSCALL/npids)log "$MOD_SYSCALL: Remaining not livepatched processes: $pending_pids" for pid in ${pids[@]}; do	kill $pid || truedone disable_lp $MOD_SYSCALLunload_lp $MOD_SYSCALL check_result "% insmod test_modules/$MOD_SYSCALL.ko klp_pids=$pid_listlivepatch: enabling patch '$MOD_SYSCALL'livepatch: '$MOD_SYSCALL': initializing patching transitionlivepatch: '$MOD_SYSCALL': starting patching transitionlivepatch: '$MOD_SYSCALL': completing patching transitionlivepatch: '$MOD_SYSCALL': patching complete$MOD_SYSCALL: Remaining not livepatched processes: 0% echo 0 > $SYSFS_KLP_DIR/$MOD_SYSCALL/enabledlivepatch: '$MOD_SYSCALL': initializing unpatching transitionlivepatch: '$MOD_SYSCALL': starting unpatching transitionlivepatch: '$MOD_SYSCALL': completing unpatching transitionlivepatch: '$MOD_SYSCALL': unpatching complete% rmmod $MOD_SYSCALL" exit 0