diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/ntp.c | 91 |
1 files changed, 47 insertions, 44 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index 2586c30f065..3fc81066d7f 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -65,7 +65,9 @@ static void ntp_update_offset(long offset) if (!(time_status & STA_PLL)) return; - time_offset = offset * NSEC_PER_USEC; + time_offset = offset; + if (!(time_status & STA_NANO)) + time_offset *= NSEC_PER_USEC; /* * Scale the phase adjustment and @@ -86,8 +88,11 @@ static void ntp_update_offset(long offset) freq_adj = time_offset * mtemp; freq_adj = shift_right(freq_adj, time_constant * 2 + (SHIFT_PLL + 2) * 2 - SHIFT_NSEC); - if (mtemp >= MINSEC && (time_status & STA_FLL || mtemp > MAXSEC)) + time_status &= ~STA_MODE; + if (mtemp >= MINSEC && (time_status & STA_FLL || mtemp > MAXSEC)) { freq_adj += div_s64(time_offset << (SHIFT_NSEC - SHIFT_FLL), mtemp); + time_status |= STA_MODE; + } freq_adj += time_freq; freq_adj = min(freq_adj, (s64)MAXFREQ_NSEC); time_freq = max(freq_adj, (s64)-MAXFREQ_NSEC); @@ -272,6 +277,7 @@ static inline void notify_cmos_timer(void) { } */ int do_adjtimex(struct timex *txc) { + struct timespec ts; long save_adjust; int result; @@ -282,17 +288,11 @@ int do_adjtimex(struct timex *txc) /* Now we validate the data before disabling interrupts */ if ((txc->modes & ADJ_OFFSET_SINGLESHOT) == ADJ_OFFSET_SINGLESHOT) { - /* singleshot must not be used with any other mode bits */ - if (txc->modes != ADJ_OFFSET_SINGLESHOT && - txc->modes != ADJ_OFFSET_SS_READ) + /* singleshot must not be used with any other mode bits */ + if (txc->modes & ~ADJ_OFFSET_SS_READ) return -EINVAL; } - if (txc->modes != ADJ_OFFSET_SINGLESHOT && (txc->modes & ADJ_OFFSET)) - /* adjustment Offset limited to +- .512 seconds */ - if (txc->offset <= - MAXPHASE || txc->offset >= MAXPHASE ) - return -EINVAL; - /* if the quartz is off by more than 10% something is VERY wrong ! */ if (txc->modes & ADJ_TICK) if (txc->tick < 900000/USER_HZ || @@ -300,51 +300,46 @@ int do_adjtimex(struct timex *txc) return -EINVAL; write_seqlock_irq(&xtime_lock); - result = time_state; /* mostly `TIME_OK' */ /* Save for later - semantics of adjtime is to return old value */ save_adjust = time_adjust; -#if 0 /* STA_CLOCKERR is never set yet */ - time_status &= ~STA_CLOCKERR; /* reset STA_CLOCKERR */ -#endif /* If there are input parameters, then process them */ if (txc->modes) { - if (txc->modes & ADJ_STATUS) /* only set allowed bits */ - time_status = (txc->status & ~STA_RONLY) | - (time_status & STA_RONLY); + if (txc->modes & ADJ_STATUS) { + if ((time_status & STA_PLL) && + !(txc->status & STA_PLL)) { + time_state = TIME_OK; + time_status = STA_UNSYNC; + } + /* only set allowed bits */ + time_status &= STA_RONLY; + time_status |= txc->status & ~STA_RONLY; + } + + if (txc->modes & ADJ_NANO) + time_status |= STA_NANO; + if (txc->modes & ADJ_MICRO) + time_status &= ~STA_NANO; if (txc->modes & ADJ_FREQUENCY) { - if (txc->freq > MAXFREQ || txc->freq < -MAXFREQ) { - result = -EINVAL; - goto leave; - } - time_freq = ((s64)txc->freq * NSEC_PER_USEC) + time_freq = min(txc->freq, MAXFREQ); + time_freq = min(time_freq, -MAXFREQ); + time_freq = ((s64)time_freq * NSEC_PER_USEC) >> (SHIFT_USEC - SHIFT_NSEC); } - if (txc->modes & ADJ_MAXERROR) { - if (txc->maxerror < 0 || txc->maxerror >= NTP_PHASE_LIMIT) { - result = -EINVAL; - goto leave; - } + if (txc->modes & ADJ_MAXERROR) time_maxerror = txc->maxerror; - } - - if (txc->modes & ADJ_ESTERROR) { - if (txc->esterror < 0 || txc->esterror >= NTP_PHASE_LIMIT) { - result = -EINVAL; - goto leave; - } + if (txc->modes & ADJ_ESTERROR) time_esterror = txc->esterror; - } if (txc->modes & ADJ_TIMECONST) { - if (txc->constant < 0) { /* NTP v4 uses values > 6 */ - result = -EINVAL; - goto leave; - } - time_constant = min(txc->constant + 4, (long)MAXTC); + time_constant = txc->constant; + if (!(time_status & STA_NANO)) + time_constant += 4; + time_constant = min(time_constant, (long)MAXTC); + time_constant = max(time_constant, 0l); } if (txc->modes & ADJ_OFFSET) { @@ -360,16 +355,20 @@ int do_adjtimex(struct timex *txc) if (txc->modes & (ADJ_TICK|ADJ_FREQUENCY|ADJ_OFFSET)) ntp_update_frequency(); } -leave: + + result = time_state; /* mostly `TIME_OK' */ if (time_status & (STA_UNSYNC|STA_CLOCKERR)) result = TIME_ERROR; if ((txc->modes == ADJ_OFFSET_SINGLESHOT) || (txc->modes == ADJ_OFFSET_SS_READ)) txc->offset = save_adjust; - else + else { txc->offset = ((long)shift_right(time_offset, SHIFT_UPDATE)) * - NTP_INTERVAL_FREQ / 1000; + NTP_INTERVAL_FREQ; + if (!(time_status & STA_NANO)) + txc->offset /= NSEC_PER_USEC; + } txc->freq = (time_freq / NSEC_PER_USEC) << (SHIFT_USEC - SHIFT_NSEC); txc->maxerror = time_maxerror; @@ -391,7 +390,11 @@ leave: txc->stbcnt = 0; write_sequnlock_irq(&xtime_lock); - do_gettimeofday(&txc->time); + getnstimeofday(&ts); + txc->time.tv_sec = ts.tv_sec; + txc->time.tv_usec = ts.tv_nsec; + if (!(time_status & STA_NANO)) + txc->time.tv_usec /= NSEC_PER_USEC; notify_cmos_timer(); |