projects/linux·blob master · refs

56 lines · 1.7 KiB

1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3# Copyright (C) 2023 SUSE
4# Author: Marcos Paulo de Souza <[email protected]>
5
6. $(dirname $0)/functions.sh
7
8MOD_SYSCALL=test_klp_syscall
9
10setup_config
11
12# - Start _NRPROC processes calling getpid and load a livepatch to patch the
13# getpid syscall. Check if all the processes transitioned to the livepatched
14# state.
15
16start_test "patch getpid syscall while being heavily hammered"
17
18NPROC=$(getconf _NPROCESSORS_ONLN)
19MAXPROC=128
20
21for i in $(seq 1 $(($NPROC < $MAXPROC ? $NPROC : $MAXPROC))); do
22 ./test_klp-call_getpid &
23 pids[$i]="$!"
24done
25
26pid_list=$(echo ${pids[@]} | tr ' ' ',')
27load_lp $MOD_SYSCALL klp_pids=$pid_list
28
29# wait for all tasks to transition to patched state
30loop_until 'grep -q '^0$' $SYSFS_KERNEL_DIR/$MOD_SYSCALL/npids'
31
32pending_pids=$(cat $SYSFS_KERNEL_DIR/$MOD_SYSCALL/npids)
33log "$MOD_SYSCALL: Remaining not livepatched processes: $pending_pids"
34
35for pid in ${pids[@]}; do
36 kill $pid || true
37done
38
39disable_lp $MOD_SYSCALL
40unload_lp $MOD_SYSCALL
41
42check_result "% insmod test_modules/$MOD_SYSCALL.ko klp_pids=$pid_list
43livepatch: enabling patch '$MOD_SYSCALL'
44livepatch: '$MOD_SYSCALL': initializing patching transition
45livepatch: '$MOD_SYSCALL': starting patching transition
46livepatch: '$MOD_SYSCALL': completing patching transition
47livepatch: '$MOD_SYSCALL': patching complete
48$MOD_SYSCALL: Remaining not livepatched processes: 0
49% echo 0 > $SYSFS_KLP_DIR/$MOD_SYSCALL/enabled
50livepatch: '$MOD_SYSCALL': initializing unpatching transition
51livepatch: '$MOD_SYSCALL': starting unpatching transition
52livepatch: '$MOD_SYSCALL': completing unpatching transition
53livepatch: '$MOD_SYSCALL': unpatching complete
54% rmmod $MOD_SYSCALL"
55
56exit 0