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// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <test_progs.h>
#include <pthread.h>
#include <network_helpers.h>
#include "timer_lockup.skel.h"
static long cpu;
static int *timer1_err;
static int *timer2_err;
static bool skip;
volatile int k = 0;
static void *timer_lockup_thread(void *arg)
{
LIBBPF_OPTS(bpf_test_run_opts, opts,
.data_in = &pkt_v4,
.data_size_in = sizeof(pkt_v4),
.repeat = 1000,
);
int i, prog_fd = *(int *)arg;
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(__sync_fetch_and_add(&cpu, 1), &cpuset);
ASSERT_OK(pthread_setaffinity_np(pthread_self(), sizeof(cpuset),
&cpuset),
"cpu affinity");
for (i = 0; !READ_ONCE(*timer1_err) && !READ_ONCE(*timer2_err); i++) {
bpf_prog_test_run_opts(prog_fd, &opts);
/* Skip the test if we can't reproduce the race in a reasonable
* amount of time.
*/
if (i > 50) {
WRITE_ONCE(skip, true);
break;
}
}
return NULL;
}
void test_timer_lockup(void)
{
int timer1_prog, timer2_prog;
struct timer_lockup *skel;
pthread_t thrds[2];
void *ret;
skel = timer_lockup__open_and_load();
if (!ASSERT_OK_PTR(skel, "timer_lockup__open_and_load"))
return;
timer1_prog = bpf_program__fd(skel->progs.timer1_prog);
timer2_prog = bpf_program__fd(skel->progs.timer2_prog);
timer1_err = &skel->bss->timer1_err;
timer2_err = &skel->bss->timer2_err;
if (!ASSERT_OK(pthread_create(&thrds[0], NULL, timer_lockup_thread,
&timer1_prog),
"pthread_create thread1"))
goto out;
if (!ASSERT_OK(pthread_create(&thrds[1], NULL, timer_lockup_thread,
&timer2_prog),
"pthread_create thread2")) {
pthread_exit(&thrds[0]);
goto out;
}
pthread_join(thrds[1], &ret);
pthread_join(thrds[0], &ret);
if (skip) {
test__skip();
goto out;
}
if (*timer1_err != -EDEADLK && *timer1_err != 0)
ASSERT_FAIL("timer1_err bad value");
if (*timer2_err != -EDEADLK && *timer2_err != 0)
ASSERT_FAIL("timer2_err bad value");
out:
timer_lockup__destroy(skel);
return;
}
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