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// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include "log.h"
#include "timens.h"
#define OFFSET (36000)
struct thread_args {
char *tst_name;
struct timespec *now;
};
static void *tcheck(void *_args)
{
struct thread_args *args = _args;
struct timespec *now = args->now, tst;
int i;
for (i = 0; i < 2; i++) {
_gettime(CLOCK_MONOTONIC, &tst, i);
if (labs(tst.tv_sec - now->tv_sec) > 5) {
pr_fail("%s: in-thread: unexpected value: %ld (%ld)\n",
args->tst_name, tst.tv_sec, now->tv_sec);
return (void *)1UL;
}
}
return NULL;
}
static int check_in_thread(char *tst_name, struct timespec *now)
{
struct thread_args args = {
.tst_name = tst_name,
.now = now,
};
pthread_t th;
void *retval;
if (pthread_create(&th, NULL, tcheck, &args))
return pr_perror("thread");
if (pthread_join(th, &retval))
return pr_perror("pthread_join");
return !(retval == NULL);
}
static int check(char *tst_name, struct timespec *now)
{
struct timespec tst;
int i;
for (i = 0; i < 2; i++) {
_gettime(CLOCK_MONOTONIC, &tst, i);
if (labs(tst.tv_sec - now->tv_sec) > 5)
return pr_fail("%s: unexpected value: %ld (%ld)\n",
tst_name, tst.tv_sec, now->tv_sec);
}
if (check_in_thread(tst_name, now))
return 1;
ksft_test_result_pass("%s\n", tst_name);
return 0;
}
int main(int argc, char *argv[])
{
struct timespec now;
int status;
pid_t pid;
if (argc > 1) {
char *endptr;
ksft_cnt.ksft_pass = 1;
now.tv_sec = strtoul(argv[1], &endptr, 0);
if (*endptr != 0)
return pr_perror("strtoul");
return check("child after exec", &now);
}
nscheck();
ksft_set_plan(4);
clock_gettime(CLOCK_MONOTONIC, &now);
if (unshare_timens())
return 1;
if (_settime(CLOCK_MONOTONIC, OFFSET))
return 1;
if (check("parent before vfork", &now))
return 1;
pid = vfork();
if (pid < 0)
return pr_perror("fork");
if (pid == 0) {
char now_str[64];
char *cargv[] = {"exec", now_str, NULL};
char *cenv[] = {NULL};
/* Check for proper vvar offsets after execve. */
snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET);
execve("/proc/self/exe", cargv, cenv);
pr_perror("execve");
_exit(1);
}
if (waitpid(pid, &status, 0) != pid)
return pr_perror("waitpid");
if (status)
ksft_exit_fail();
ksft_inc_pass_cnt();
ksft_test_result_pass("wait for child\n");
/* Check that we are still in the source timens. */
if (check("parent after vfork", &now))
return 1;
ksft_exit_pass();
return 0;
}
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