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