selftests/timens: Add timer offsets test (d5b0117d) · Commits · 戴 / test

tools/testing/selftests/timens/.gitignore

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Original line number	Diff line number	Diff line
		clock_nanosleep
		procfs
		timens
		timer
		timerfd

tools/testing/selftests/timens/Makefile

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Original line number	Diff line number	Diff line
		TEST_GEN_PROGS := timens timerfd clock_nanosleep procfs
		TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs

		CFLAGS := -Wall -Werror -pthread
		LDFLAGS := -lrt

tools/testing/selftests/timens/timer.c

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		// SPDX-License-Identifier: GPL-2.0
		#define _GNU_SOURCE
		#include <sched.h>

		#include <sys/syscall.h>
		#include <sys/types.h>
		#include <sys/wait.h>
		#include <time.h>
		#include <unistd.h>
		#include <stdlib.h>
		#include <stdio.h>
		#include <stdint.h>
		#include <signal.h>
		#include <time.h>

		#include "log.h"
		#include "timens.h"

		int run_test(int clockid, struct timespec now)
		{
		struct itimerspec new_value;
		long long elapsed;
		timer_t fd;
		int i;

		for (i = 0; i < 2; i++) {
		struct sigevent sevp = {.sigev_notify = SIGEV_NONE};
		int flags = 0;

		new_value.it_value.tv_sec = 3600;
		new_value.it_value.tv_nsec = 0;
		new_value.it_interval.tv_sec = 1;
		new_value.it_interval.tv_nsec = 0;

		if (i == 1) {
		new_value.it_value.tv_sec += now.tv_sec;
		new_value.it_value.tv_nsec += now.tv_nsec;
		}

		if (timer_create(clockid, &sevp, &fd) == -1) {
		if (errno == ENOSYS) {
		ksft_test_result_skip("Posix Clocks & timers are supported\n");
		return 0;
		}
		return pr_perror("timerfd_create");
		}

		if (i == 1)
		flags \|= TIMER_ABSTIME;
		if (timer_settime(fd, flags, &new_value, NULL) == -1)
		return pr_perror("timerfd_settime");

		if (timer_gettime(fd, &new_value) == -1)
		return pr_perror("timerfd_gettime");

		elapsed = new_value.it_value.tv_sec;
		if (abs(elapsed - 3600) > 60) {
		ksft_test_result_fail("clockid: %d elapsed: %lld\n",
		clockid, elapsed);
		return 1;
		}
		}

		ksft_test_result_pass("clockid=%d\n", clockid);

		return 0;
		}

		int main(int argc, char *argv[])
		{
		int ret, status, len, fd;
		char buf[4096];
		pid_t pid;
		struct timespec btime_now, mtime_now;

		nscheck();

		ksft_set_plan(3);

		clock_gettime(CLOCK_MONOTONIC, &mtime_now);
		clock_gettime(CLOCK_BOOTTIME, &btime_now);

		if (unshare_timens())
		return 1;

		len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
		CLOCK_MONOTONIC, 70 * 24 * 3600,
		CLOCK_BOOTTIME, 9 * 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);
		mtime_now.tv_sec += 70 * 24 * 3600;
		btime_now.tv_sec += 9 * 24 * 3600;

		pid = fork();
		if (pid < 0)
		return pr_perror("Unable to fork");
		if (pid == 0) {
		ret = 0;
		ret \|= run_test(CLOCK_BOOTTIME, btime_now);
		ret \|= run_test(CLOCK_MONOTONIC, mtime_now);
		ret \|= run_test(CLOCK_BOOTTIME_ALARM, btime_now);

		if (ret)
		ksft_exit_fail();
		ksft_exit_pass();
		return ret;
		}

		if (waitpid(pid, &status, 0) != pid)
		return pr_perror("Unable to wait the child process");

		if (WIFEXITED(status))
		return WEXITSTATUS(status);

		return 1;
		}

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