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Commit e03a58c3 authored by John Stultz's avatar John Stultz Committed by Thomas Gleixner
Browse files

kselftests: timers: Add adjtimex SETOFFSET validity tests 



Add some simple tests to check both valid and invalid
offsets when using adjtimex's ADJ_SETOFFSET method.

Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
Acked-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Harald Hoyer <harald@redhat.com>
Cc: Kay Sievers <kay@vrfy.org>
Cc: David Herrmann <dh.herrmann@gmail.com>
Link: http://lkml.kernel.org/r/1453417415-19110-3-git-send-email-john.stultz@linaro.org


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent dd4e17ab

tools/testing/selftests/timers/valid-adjtimex.c

+138 −1
Original line number Diff line number Diff line
@@ -45,7 +45,17 @@ static inline int ksft_exit_fail(void) 
}

#endif



#define NSEC_PER_SEC 1000000000L

#define NSEC_PER_SEC 1000000000LL

#define USEC_PER_SEC 1000000LL



#define ADJ_SETOFFSET 0x0100



#include <sys/syscall.h>

static int clock_adjtime(clockid_t id, struct timex *tx)

{

	return syscall(__NR_clock_adjtime, id, tx);

}





/* clear NTP time_status & time_state */

int clear_time_state(void)
@@ -193,10 +203,137 @@ int validate_freq(void) 
}





int set_offset(long long offset, int use_nano)

{

	struct timex tmx = {};

	int ret;



	tmx.modes = ADJ_SETOFFSET;

	if (use_nano) {

		tmx.modes |= ADJ_NANO;



		tmx.time.tv_sec = offset / NSEC_PER_SEC;

		tmx.time.tv_usec = offset % NSEC_PER_SEC;



		if (offset < 0 && tmx.time.tv_usec) {

			tmx.time.tv_sec -= 1;

			tmx.time.tv_usec += NSEC_PER_SEC;

		}

	} else {

		tmx.time.tv_sec = offset / USEC_PER_SEC;

		tmx.time.tv_usec = offset % USEC_PER_SEC;



		if (offset < 0 && tmx.time.tv_usec) {

			tmx.time.tv_sec -= 1;

			tmx.time.tv_usec += USEC_PER_SEC;

		}

	}



	ret = clock_adjtime(CLOCK_REALTIME, &tmx);

	if (ret < 0) {

		printf("(sec: %ld  usec: %ld) ", tmx.time.tv_sec, tmx.time.tv_usec);

		printf("[FAIL]\n");

		return -1;

	}

	return 0;

}



int set_bad_offset(long sec, long usec, int use_nano)

{

	struct timex tmx = {};

	int ret;



	tmx.modes = ADJ_SETOFFSET;

	if (use_nano)

		tmx.modes |= ADJ_NANO;



	tmx.time.tv_sec = sec;

	tmx.time.tv_usec = usec;

	ret = clock_adjtime(CLOCK_REALTIME, &tmx);

	if (ret >= 0) {

		printf("Invalid (sec: %ld  usec: %ld) did not fail! ", tmx.time.tv_sec, tmx.time.tv_usec);

		printf("[FAIL]\n");

		return -1;

	}

	return 0;

}



int validate_set_offset(void)

{

	printf("Testing ADJ_SETOFFSET... ");



	/* Test valid values */

	if (set_offset(NSEC_PER_SEC - 1, 1))

		return -1;



	if (set_offset(-NSEC_PER_SEC + 1, 1))

		return -1;



	if (set_offset(-NSEC_PER_SEC - 1, 1))

		return -1;



	if (set_offset(5 * NSEC_PER_SEC, 1))

		return -1;



	if (set_offset(-5 * NSEC_PER_SEC, 1))

		return -1;



	if (set_offset(5 * NSEC_PER_SEC + NSEC_PER_SEC / 2, 1))

		return -1;



	if (set_offset(-5 * NSEC_PER_SEC - NSEC_PER_SEC / 2, 1))

		return -1;



	if (set_offset(USEC_PER_SEC - 1, 0))

		return -1;



	if (set_offset(-USEC_PER_SEC + 1, 0))

		return -1;



	if (set_offset(-USEC_PER_SEC - 1, 0))

		return -1;



	if (set_offset(5 * USEC_PER_SEC, 0))

		return -1;



	if (set_offset(-5 * USEC_PER_SEC, 0))

		return -1;



	if (set_offset(5 * USEC_PER_SEC + USEC_PER_SEC / 2, 0))

		return -1;



	if (set_offset(-5 * USEC_PER_SEC - USEC_PER_SEC / 2, 0))

		return -1;



	/* Test invalid values */

	if (set_bad_offset(0, -1, 1))

		return -1;

	if (set_bad_offset(0, -1, 0))

		return -1;

	if (set_bad_offset(0, 2 * NSEC_PER_SEC, 1))

		return -1;

	if (set_bad_offset(0, 2 * USEC_PER_SEC, 0))

		return -1;

	if (set_bad_offset(0, NSEC_PER_SEC, 1))

		return -1;

	if (set_bad_offset(0, USEC_PER_SEC, 0))

		return -1;

	if (set_bad_offset(0, -NSEC_PER_SEC, 1))

		return -1;

	if (set_bad_offset(0, -USEC_PER_SEC, 0))

		return -1;



	printf("[OK]\n");

	return 0;

}



int main(int argc, char **argv)

{

	if (validate_freq())

		return ksft_exit_fail();



	if (validate_set_offset())

		return ksft_exit_fail();



	return ksft_exit_pass();

}