move in NFS specific call from vnode.h

[unix-history] / usr / src / sys / kern / kern_time.c

diff --git a/usr/src/sys/kern/kern_time.c b/usr/src/sys/kern/kern_time.c
index 067821c..4dc818c 100644 (file)
--- a/usr/src/sys/kern/kern_time.c
+++ b/usr/src/sys/kern/kern_time.c
@@ -1,13 +1,19 @@
-/*     kern_time.c     5.15    83/05/27        */
+/*
+ * Copyright (c) 1982, 1986, 1989, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * %sccs.include.redist.c%
+ *
+ *     @(#)kern_time.c 8.2 (Berkeley) %G%
+ */

 
 

-#include "../machine/reg.h"
+#include <sys/param.h>
+#include <sys/resourcevar.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/vnode.h>

 
 

-#include "../h/param.h"
-#include "../h/dir.h"          /* XXX */
-#include "../h/user.h"
-#include "../h/kernel.h"
-#include "../h/inode.h"
-#include "../h/proc.h"

 
 /* 
  * Time of day and interval timer support.
 
 /* 
  * Time of day and interval timer support.


@@ -19,63 +25,142 @@
  * timers when they expire.
  */
 
  * timers when they expire.
  */
 

-gettimeofday()
+struct gettimeofday_args {
+       struct  timeval *tp;
+       struct  timezone *tzp;
+};
+/* ARGSUSED */
+gettimeofday(p, uap, retval)
+       struct proc *p;
+       register struct gettimeofday_args *uap;
+       int *retval;

 {
 {

-       register struct a {
-               struct  timeval *tp;
-               struct  timezone *tzp;
-       } *uap = (struct a *)u.u_ap;

        struct timeval atv;
        struct timeval atv;

-       int s;
+       int error = 0;

 
 

-       s = spl7(); atv = time; splx(s);
-       u.u_error = copyout((caddr_t)&atv, (caddr_t)uap->tp, sizeof (atv));
-       if (u.u_error)
-               return;
-       if (uap->tzp == 0)
-               return;
-       /* SHOULD HAVE PER-PROCESS TIMEZONE */
-       u.u_error = copyout((caddr_t)&tz, (caddr_t)uap->tzp, sizeof (tz));
+       if (uap->tp) {
+               microtime(&atv);
+               if (error = copyout((caddr_t)&atv, (caddr_t)uap->tp,
+                   sizeof (atv)))
+                       return (error);
+       }
+       if (uap->tzp)
+               error = copyout((caddr_t)&tz, (caddr_t)uap->tzp,
+                   sizeof (tz));
+       return (error);

 }
 
 }
 

-settimeofday()
+struct settimeofday_args {
+       struct  timeval *tv;
+       struct  timezone *tzp;
+};
+/* ARGSUSED */
+settimeofday(p, uap, retval)
+       struct proc *p;
+       struct settimeofday_args *uap;
+       int *retval;

 {
 {

-       register struct a {
-               struct  timeval *tv;
-               struct  timezone *tzp;
-       } *uap = (struct a *)u.u_ap;
-       struct timeval atv;
+       struct timeval atv, delta;

        struct timezone atz;
        struct timezone atz;

+       int error, s;

 
 

-       u.u_error = copyin((caddr_t)uap->tv, (caddr_t)&atv,
-               sizeof (struct timeval));
-       if (u.u_error)
-               return;
-       setthetime(&atv);
-       if (uap->tzp && suser()) {
-               u.u_error = copyin((caddr_t)uap->tzp, (caddr_t)&atz,
-                       sizeof (atz));
-               if (u.u_error)
-                       return;
+       if (error = suser(p->p_ucred, &p->p_acflag))
+               return (error);
+       /* Verify all parameters before changing time. */
+       if (uap->tv &&
+           (error = copyin((caddr_t)uap->tv, (caddr_t)&atv, sizeof(atv))))
+               return (error);
+       if (uap->tzp &&
+           (error = copyin((caddr_t)uap->tzp, (caddr_t)&atz, sizeof(atz))))
+               return (error);
+       if (uap->tv) {
+               /* WHAT DO WE DO ABOUT PENDING REAL-TIME TIMEOUTS??? */
+               s = splclock();
+               /* nb. delta.tv_usec may be < 0, but this is OK here */
+               delta.tv_sec = atv.tv_sec - time.tv_sec;
+               delta.tv_usec = atv.tv_usec - time.tv_usec;
+               time = atv;
+               (void) splsoftclock();
+               timevaladd(&boottime, &delta);
+               timevalfix(&boottime);
+               timevaladd(&runtime, &delta);
+               timevalfix(&runtime);
+#              ifdef NFS
+                       lease_updatetime(delta.tv_sec);
+#              endif
+               splx(s);
+               resettodr();

        }
        }

+       if (uap->tzp)
+               tz = atz;
+       return (0);

 }
 
 }
 

-setthetime(tv)
-       struct timeval *tv;
+extern int tickadj;                    /* "standard" clock skew, us./tick */
+int    tickdelta;                      /* current clock skew, us. per tick */
+long   timedelta;                      /* unapplied time correction, us. */
+long   bigadj = 1000000;               /* use 10x skew above bigadj us. */
+
+struct adjtime_args {
+       struct timeval *delta;
+       struct timeval *olddelta;
+};
+/* ARGSUSED */
+adjtime(p, uap, retval)
+       struct proc *p;
+       register struct adjtime_args *uap;
+       int *retval;

 {
 {

-       int s;
+       struct timeval atv;
+       register long ndelta, ntickdelta, odelta;
+       int s, error;

 
 

-       if (!suser())
-               return;
-/* WHAT DO WE DO ABOUT PENDING REAL-TIME TIMEOUTS??? */
-       boottime.tv_sec += tv->tv_sec - time.tv_sec;
-       s = spl7(); time = *tv; splx(s);
-       resettodr();
+       if (error = suser(p->p_ucred, &p->p_acflag))
+               return (error);
+       if (error =
+           copyin((caddr_t)uap->delta, (caddr_t)&atv, sizeof(struct timeval)))
+               return (error);
+
+       /*
+        * Compute the total correction and the rate at which to apply it.
+        * Round the adjustment down to a whole multiple of the per-tick
+        * delta, so that after some number of incremental changes in
+        * hardclock(), tickdelta will become zero, lest the correction
+        * overshoot and start taking us away from the desired final time.
+        */
+       ndelta = atv.tv_sec * 1000000 + atv.tv_usec;
+       if (ndelta > bigadj)
+               ntickdelta = 10 * tickadj;
+       else
+               ntickdelta = tickadj;
+       if (ndelta % ntickdelta)
+               ndelta = ndelta / ntickdelta * ntickdelta;
+
+       /*
+        * To make hardclock()'s job easier, make the per-tick delta negative
+        * if we want time to run slower; then hardclock can simply compute
+        * tick + tickdelta, and subtract tickdelta from timedelta.
+        */
+       if (ndelta < 0)
+               ntickdelta = -ntickdelta;
+       s = splclock();
+       odelta = timedelta;
+       timedelta = ndelta;
+       tickdelta = ntickdelta;
+       splx(s);
+
+       if (uap->olddelta) {
+               atv.tv_sec = odelta / 1000000;
+               atv.tv_usec = odelta % 1000000;
+               (void) copyout((caddr_t)&atv, (caddr_t)uap->olddelta,
+                   sizeof(struct timeval));
+       }
+       return (0);

 }
 
 /*
  * Get value of an interval timer.  The process virtual and
 }
 
 /*
  * Get value of an interval timer.  The process virtual and

- * profiling virtual time timers are kept in the u. area, since
+ * profiling virtual time timers are kept in the p_stats area, since

  * they can be swapped out.  These are kept internally in the
  * way they are specified externally: in time until they expire.
  *
  * they can be swapped out.  These are kept internally in the
  * way they are specified externally: in time until they expire.
  *


@@ -94,20 +179,22 @@ setthetime(tv)
  * real time timers .it_interval.  Rather, we compute the next time in
  * absolute time the timer should go off.
  */
  * real time timers .it_interval.  Rather, we compute the next time in
  * absolute time the timer should go off.
  */

-getitimer()
+struct getitimer_args {
+       u_int   which;
+       struct  itimerval *itv;
+};
+/* ARGSUSED */
+getitimer(p, uap, retval)
+       struct proc *p;
+       register struct getitimer_args *uap;
+       int *retval;

 {
 {

-       register struct a {
-               u_int   which;
-               struct  itimerval *itv;
-       } *uap = (struct a *)u.u_ap;

        struct itimerval aitv;
        int s;
 
        struct itimerval aitv;
        int s;
 

-       if (uap->which > 2) {
-               u.u_error = EINVAL;
-               return;
-       }
-       s = spl7();
+       if (uap->which > ITIMER_PROF)
+               return (EINVAL);
+       s = splclock();

        if (uap->which == ITIMER_REAL) {
                /*
                 * Convert from absoulte to relative time in .it_value
        if (uap->which == ITIMER_REAL) {
                /*
                 * Convert from absoulte to relative time in .it_value


@@ -115,57 +202,58 @@ getitimer()
                 * has passed return 0, else return difference between
                 * current time and time for the timer to go off.
                 */
                 * has passed return 0, else return difference between
                 * current time and time for the timer to go off.
                 */

-               aitv = u.u_procp->p_realtimer;
+               aitv = p->p_realtimer;

                if (timerisset(&aitv.it_value))
                        if (timercmp(&aitv.it_value, &time, <))
                                timerclear(&aitv.it_value);
                        else
                if (timerisset(&aitv.it_value))
                        if (timercmp(&aitv.it_value, &time, <))
                                timerclear(&aitv.it_value);
                        else

-                               timevalsub(&aitv.it_value, &time);
+                               timevalsub(&aitv.it_value,
+                                   (struct timeval *)&time);

        } else
        } else

-               aitv = u.u_timer[uap->which];
-       splx(s);
-       u.u_error = copyout((caddr_t)&aitv, (caddr_t)uap->itv,
-           sizeof (struct itimerval));
+               aitv = p->p_stats->p_timer[uap->which];

        splx(s);
        splx(s);

+       return (copyout((caddr_t)&aitv, (caddr_t)uap->itv,
+           sizeof (struct itimerval)));

 }
 
 }
 

-setitimer()
+struct setitimer_args {
+       u_int   which;
+       struct  itimerval *itv, *oitv;
+};
+/* ARGSUSED */
+setitimer(p, uap, retval)
+       struct proc *p;
+       register struct setitimer_args *uap;
+       int *retval;

 {
 {

-       register struct a {
-               u_int   which;
-               struct  itimerval *itv, *oitv;
-       } *uap = (struct a *)u.u_ap;

        struct itimerval aitv;
        struct itimerval aitv;

-       int s;
-       register struct proc *p = u.u_procp;
+       register struct itimerval *itvp;
+       int s, error;

 
 

-       if (uap->which > 2) {
-               u.u_error = EINVAL;
-               return;
-       }
-       u.u_error = copyin((caddr_t)uap->itv, (caddr_t)&aitv,
-           sizeof (struct itimerval));
-       if (u.u_error)
-               return;
-       if (uap->oitv) {
-               uap->itv = uap->oitv;
-               getitimer();
-       }
-       if (itimerfix(&aitv.it_value) || itimerfix(&aitv.it_interval)) {
-               u.u_error = EINVAL;
-               return;
-       }
-       s = spl7();
+       if (uap->which > ITIMER_PROF)
+               return (EINVAL);
+       itvp = uap->itv;
+       if (itvp && (error = copyin((caddr_t)itvp, (caddr_t)&aitv,
+           sizeof(struct itimerval))))
+               return (error);
+       if ((uap->itv = uap->oitv) && (error = getitimer(p, uap, retval)))
+               return (error);
+       if (itvp == 0)
+               return (0);
+       if (itimerfix(&aitv.it_value) || itimerfix(&aitv.it_interval))
+               return (EINVAL);
+       s = splclock();

        if (uap->which == ITIMER_REAL) {
                untimeout(realitexpire, (caddr_t)p);
                if (timerisset(&aitv.it_value)) {
        if (uap->which == ITIMER_REAL) {
                untimeout(realitexpire, (caddr_t)p);
                if (timerisset(&aitv.it_value)) {

-                       timevaladd(&aitv.it_value, &time);
+                       timevaladd(&aitv.it_value, (struct timeval *)&time);

                        timeout(realitexpire, (caddr_t)p, hzto(&aitv.it_value));
                }
                p->p_realtimer = aitv;
        } else
                        timeout(realitexpire, (caddr_t)p, hzto(&aitv.it_value));
                }
                p->p_realtimer = aitv;
        } else

-               u.u_timer[uap->which] = aitv;
+               p->p_stats->p_timer[uap->which] = aitv;

        splx(s);
        splx(s);

+       return (0);

 }
 
 /*
 }
 
 /*


@@ -176,18 +264,21 @@ setitimer()
  * This is where delay in processing this timeout causes multiple
  * SIGALRM calls to be compressed into one.
  */
  * This is where delay in processing this timeout causes multiple
  * SIGALRM calls to be compressed into one.
  */

-realitexpire(p)
-       register struct proc *p;
+void
+realitexpire(arg)
+       void *arg;

 {
 {

+       register struct proc *p;

        int s;
 
        int s;
 

+       p = (struct proc *)arg;

        psignal(p, SIGALRM);
        if (!timerisset(&p->p_realtimer.it_interval)) {
                timerclear(&p->p_realtimer.it_value);
                return;
        }
        for (;;) {
        psignal(p, SIGALRM);
        if (!timerisset(&p->p_realtimer.it_interval)) {
                timerclear(&p->p_realtimer.it_value);
                return;
        }
        for (;;) {

-               s = spl7();
+               s = splclock();

                timevaladd(&p->p_realtimer.it_value,
                    &p->p_realtimer.it_interval);
                if (timercmp(&p->p_realtimer.it_value, &time, >)) {
                timevaladd(&p->p_realtimer.it_value,
                    &p->p_realtimer.it_interval);
                if (timercmp(&p->p_realtimer.it_value, &time, >)) {


@@ -213,7 +304,7 @@ itimerfix(tv)
        if (tv->tv_sec < 0 || tv->tv_sec > 100000000 ||
            tv->tv_usec < 0 || tv->tv_usec >= 1000000)
                return (EINVAL);
        if (tv->tv_sec < 0 || tv->tv_sec > 100000000 ||
            tv->tv_usec < 0 || tv->tv_usec >= 1000000)
                return (EINVAL);

-       if (tv->tv_sec == 0 && tv->tv_usec < tick)
+       if (tv->tv_sec == 0 && tv->tv_usec != 0 && tv->tv_usec < tick)

                tv->tv_usec = tick;
        return (0);
 }
                tv->tv_usec = tick;
        return (0);
 }


@@ -223,7 +314,7 @@ itimerfix(tv)
  * of microseconds, which must be less than a second,
  * i.e. < 1000000.  If the timer expires, then reload
  * it.  In this case, carry over (usec - old value) to
  * of microseconds, which must be less than a second,
  * i.e. < 1000000.  If the timer expires, then reload
  * it.  In this case, carry over (usec - old value) to

- * reducint the value reloaded into the timer so that
+ * reduce the value reloaded into the timer so that

  * the timer does not drift.  This routine assumes
  * that it is called in a context where the timers
  * on which it is operating cannot change in value.
  * the timer does not drift.  This routine assumes
  * that it is called in a context where the timers
  * on which it is operating cannot change in value.