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kselftests: timers: Add adjtimex SETOFFSET validity tests

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

Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Shuah 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: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
John Stultz 2016-01-21 15:03:35 -08:00 committed by Thomas Gleixner
parent dd4e17ab70
commit e03a58c320
1 changed files with 138 additions and 1 deletions
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139
tools/testing/selftests/timers/valid-adjtimex.c
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@ -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 @@ out:
}
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();
}