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