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