Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
 
#include <linux/unistd.h>
#include <linux/futex.h>
#include <stdio.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
 
#include "log.h"
#include "timens.h"
 
#define NSEC_PER_SEC 1000000000ULL
 
static int run_test(int clockid)
{
<------>int futex_op = FUTEX_WAIT_BITSET;
<------>struct timespec timeout, end;
<------>int val = 0;
 
<------>if (clockid == CLOCK_REALTIME)
<------><------>futex_op |= FUTEX_CLOCK_REALTIME;
 
<------>clock_gettime(clockid, &timeout);
<------>timeout.tv_nsec += NSEC_PER_SEC / 10; // 100ms
<------>if (timeout.tv_nsec > NSEC_PER_SEC) {
<------><------>timeout.tv_sec++;
<------><------>timeout.tv_nsec -= NSEC_PER_SEC;
<------>}
 
<------>if (syscall(__NR_futex, &val, futex_op, 0,
<------><------>    &timeout, 0, FUTEX_BITSET_MATCH_ANY) >= 0) {
<------><------>ksft_test_result_fail("futex didn't return ETIMEDOUT\n");
<------><------>return 1;
<------>}
 
<------>if (errno != ETIMEDOUT) {
<------><------>ksft_test_result_fail("futex didn't return ETIMEDOUT: %s\n",
<------><------><------><------><------><------><------>strerror(errno));
<------><------>return 1;
<------>}
 
<------>clock_gettime(clockid, &end);
 
<------>if (end.tv_sec < timeout.tv_sec ||
<------>    (end.tv_sec == timeout.tv_sec && end.tv_nsec < timeout.tv_nsec)) {
<------><------>ksft_test_result_fail("futex slept less than 100ms\n");
<------><------>return 1;
<------>}
 
 
<------>ksft_test_result_pass("futex with the %d clockid\n", clockid);
 
<------>return 0;
}
 
int main(int argc, char *argv[])
{
<------>int status, len, fd;
<------>char buf[4096];
<------>pid_t pid;
<------>struct timespec mtime_now;
 
<------>nscheck();
 
<------>ksft_set_plan(2);
 
<------>clock_gettime(CLOCK_MONOTONIC, &mtime_now);
 
<------>if (unshare_timens())
<------><------>return 1;
 
<------>len = snprintf(buf, sizeof(buf), "%d %d 0",
<------><------><------>CLOCK_MONOTONIC, 70 * 24 * 3600);
<------>fd = open("/proc/self/timens_offsets", O_WRONLY);
<------>if (fd < 0)
<------><------>return pr_perror("/proc/self/timens_offsets");
 
<------>if (write(fd, buf, len) != len)
<------><------>return pr_perror("/proc/self/timens_offsets");
 
<------>close(fd);
 
<------>pid = fork();
<------>if (pid < 0)
<------><------>return pr_perror("Unable to fork");
<------>if (pid == 0) {
<------><------>int ret = 0;
 
<------><------>ret |= run_test(CLOCK_REALTIME);
<------><------>ret |= run_test(CLOCK_MONOTONIC);
<------><------>if (ret)
<------><------><------>ksft_exit_fail();
<------><------>ksft_exit_pass();
<------><------>return 0;
<------>}
 
<------>if (waitpid(pid, &status, 0) != pid)
<------><------>return pr_perror("Unable to wait the child process");
 
<------>if (WIFEXITED(status))
<------><------>return WEXITSTATUS(status);
 
<------>return 1;
}