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Commit 3a92a15f authored by John Stultz's avatar John Stultz Committed by Shuah Khan
Browse files

selftests/timers: Add set-tai from the timetest suite 



This patch adds the set-tai test which ensures the tai offset
can be set properly from adjtimex.

Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
Tested-by: default avatarPrarit Bhargava <prarit@redhat.com>
Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
parent d7b2902c

tools/testing/selftests/timers/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ LDFLAGS += -lrt -lpthread 
bins = posix_timers nanosleep inconsistency-check nsleep-lat raw_skew \

	set-timer-lat threadtest mqueue-lat valid-adjtimex \

	alarmtimer-suspend change_skew skew_consistency clocksource-switch \

	leap-a-day leapcrash

	leap-a-day leapcrash set-tai



all: ${bins}
@@ -32,6 +32,7 @@ run_destructive_tests: run_tests 
	./clocksource-switch

	./leap-a-day -s -i 10

	./leapcrash

	./set-tai



clean:

	rm -f ${bins}

tools/testing/selftests/timers/set-tai.c

0 → 100644
+79 −0
Original line number Diff line number Diff line 
/* Set tai offset

 *              by: John Stultz <john.stultz@linaro.org>

 *              (C) Copyright Linaro 2013

 *              Licensed under the GPLv2

 *

 *   This program is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation, either version 2 of the License, or

 *   (at your option) any later version.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU General Public License for more details.

 */





#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#include <sys/time.h>

#include <sys/timex.h>

#include <string.h>

#include <signal.h>

#include <unistd.h>

#ifdef KTEST

#include "../kselftest.h"

#else

static inline int ksft_exit_pass(void)

{

	exit(0);

}

static inline int ksft_exit_fail(void)

{

	exit(1);

}

#endif



int set_tai(int offset)

{

	struct timex tx;



	memset(&tx, 0, sizeof(tx));



	tx.modes = ADJ_TAI;

	tx.constant = offset;



	return adjtimex(&tx);

}



int get_tai(void)

{

	struct timex tx;



	memset(&tx, 0, sizeof(tx));



	adjtimex(&tx);

	return tx.tai;

}



int main(int argc, char **argv)

{

	int i, ret;



	ret = get_tai();

	printf("tai offset started at %i\n", ret);



	printf("Checking tai offsets can be properly set: ");

	for (i = 1; i <= 60; i++) {

		ret = set_tai(i);

		ret = get_tai();

		if (ret != i) {

			printf("[FAILED] expected: %i got %i\n", i, ret);

			return ksft_exit_fail();

		}

	}

	printf("[OK]\n");

	return ksft_exit_pass();

}