kernel/time/timekeeping.c

2575 static int timekeeping_validate_timex(const struct __kernel_timex *txc, bool aux_clock)
2577 	if (txc->modes & ADJ_ADJTIME) {
2579 		if (!(txc->modes & ADJ_OFFSET_SINGLESHOT))
2581 		if (!(txc->modes & ADJ_OFFSET_READONLY) &&
2586 		if (txc->modes && !capable(CAP_SYS_TIME))
2592 		if (txc->modes & ADJ_TICK &&
2593 		    (txc->tick <  900000/USER_HZ ||
2594 		     txc->tick > 1100000/USER_HZ))
2598 	if (txc->modes & ADJ_SETOFFSET) {
2611 		if (txc->time.tv_usec < 0)
2614 		if (txc->modes & ADJ_NANO) {
2615 			if (txc->time.tv_usec >= NSEC_PER_SEC)
2618 			if (txc->time.tv_usec >= USEC_PER_SEC)
2627 	if ((txc->modes & ADJ_FREQUENCY) && (BITS_PER_LONG == 64)) {
2628 		if (LLONG_MIN / PPM_SCALE > txc->freq)
2630 		if (LLONG_MAX / PPM_SCALE < txc->freq)
2636 		if (txc->status & (STA_INS | STA_DEL))
2640 		if (txc->modes & ADJ_TAI)
2644 		if (txc->status & (STA_PPSFREQ | STA_PPSTIME))
2672 static int __do_adjtimex(struct tk_data *tkd, struct __kernel_timex *txc,
2682 	ret = timekeeping_validate_timex(txc, aux_clock);
2685 	add_device_randomness(txc, sizeof(*txc));
2699 	if (txc->modes & ADJ_SETOFFSET) {
2700 		result->delta.tv_sec  = txc->time.tv_sec;
2701 		result->delta.tv_nsec = txc->time.tv_usec;
2702 		if (!(txc->modes & ADJ_NANO))
2711 	ret = ntp_adjtimex(tks->id, txc, &ts, &tai, &result->ad);
2722 	if (txc->modes & (ADJ_FREQUENCY | ADJ_TICK))
2730  * @txc:	Pointer to kernel_timex structure containing NTP parameters
2732 int do_adjtimex(struct __kernel_timex *txc)
2737 	ret = __do_adjtimex(&tk_core, txc, &result);
2741 	if (txc->modes & ADJ_SETOFFSET)
2946 static int aux_clock_adj(const clockid_t id, struct __kernel_timex *txc)
2958 	return __do_adjtimex(aux_tkd, txc, &result);