92 lines · c
1// SPDX-License-Identifier: GPL-2.02 3#define _GNU_SOURCE4#include <sched.h>5#include <test_progs.h>6#include <pthread.h>7#include <network_helpers.h>8 9#include "timer_lockup.skel.h"10 11static long cpu;12static int *timer1_err;13static int *timer2_err;14static bool skip;15 16volatile int k = 0;17 18static void *timer_lockup_thread(void *arg)19{20 LIBBPF_OPTS(bpf_test_run_opts, opts,21 .data_in = &pkt_v4,22 .data_size_in = sizeof(pkt_v4),23 .repeat = 1000,24 );25 int i, prog_fd = *(int *)arg;26 cpu_set_t cpuset;27 28 CPU_ZERO(&cpuset);29 CPU_SET(__sync_fetch_and_add(&cpu, 1), &cpuset);30 ASSERT_OK(pthread_setaffinity_np(pthread_self(), sizeof(cpuset),31 &cpuset),32 "cpu affinity");33 34 for (i = 0; !READ_ONCE(*timer1_err) && !READ_ONCE(*timer2_err); i++) {35 bpf_prog_test_run_opts(prog_fd, &opts);36 /* Skip the test if we can't reproduce the race in a reasonable37 * amount of time.38 */39 if (i > 50) {40 WRITE_ONCE(skip, true);41 break;42 }43 }44 45 return NULL;46}47 48void test_timer_lockup(void)49{50 int timer1_prog, timer2_prog;51 struct timer_lockup *skel;52 pthread_t thrds[2];53 void *ret;54 55 skel = timer_lockup__open_and_load();56 if (!ASSERT_OK_PTR(skel, "timer_lockup__open_and_load"))57 return;58 59 timer1_prog = bpf_program__fd(skel->progs.timer1_prog);60 timer2_prog = bpf_program__fd(skel->progs.timer2_prog);61 62 timer1_err = &skel->bss->timer1_err;63 timer2_err = &skel->bss->timer2_err;64 65 if (!ASSERT_OK(pthread_create(&thrds[0], NULL, timer_lockup_thread,66 &timer1_prog),67 "pthread_create thread1"))68 goto out;69 if (!ASSERT_OK(pthread_create(&thrds[1], NULL, timer_lockup_thread,70 &timer2_prog),71 "pthread_create thread2")) {72 pthread_exit(&thrds[0]);73 goto out;74 }75 76 pthread_join(thrds[1], &ret);77 pthread_join(thrds[0], &ret);78 79 if (skip) {80 test__skip();81 goto out;82 }83 84 if (*timer1_err != -EDEADLK && *timer1_err != 0)85 ASSERT_FAIL("timer1_err bad value");86 if (*timer2_err != -EDEADLK && *timer2_err != 0)87 ASSERT_FAIL("timer2_err bad value");88out:89 timer_lockup__destroy(skel);90 return;91}92