]> git.saurik.com Git - apple/xnu.git/blobdiff - bsd/kern/kern_time.c
xnu-6153.81.5.tar.gz
[apple/xnu.git] / bsd / kern / kern_time.c
index ba2e6c9901c9e3cc42d81c5792593da62c55b693..d1d3c498e91a4230c323404348c6240f51cbad36 100644 (file)
@@ -2,7 +2,7 @@
  * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- * 
+ *
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
- * 
+ *
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
- * 
+ *
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -22,7 +22,7 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
- * 
+ *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
 #endif
 #include <IOKit/IOBSD.h>
 #include <sys/time.h>
+#include <kern/remote_time.h>
 
-#define HZ     100     /* XXX */
+#define HZ      100     /* XXX */
 
 /* simple lock used to access timezone, tz structure */
 lck_spin_t * tz_slock;
 lck_grp_t * tz_slock_grp;
 lck_attr_t * tz_slock_attr;
-lck_grp_attr_t *tz_slock_grp_attr;
+lck_grp_attr_t  *tz_slock_grp_attr;
 
-static void            setthetime(
-                                       struct timeval  *tv);
+static void             setthetime(
+       struct timeval  *tv);
 
 void time_zone_slock_init(void);
 static boolean_t timeval_fixusec(struct timeval *t1);
@@ -117,9 +118,9 @@ static boolean_t timeval_fixusec(struct timeval *t1);
 /* ARGSUSED */
 int
 gettimeofday(
-                       struct proc     *p,
-                       struct gettimeofday_args *uap,
-                       __unused int32_t *retval)
+       struct proc     *p,
+       struct gettimeofday_args *uap,
+       __unused int32_t *retval)
 {
        int error = 0;
        struct timezone ltz; /* local copy */
@@ -179,15 +180,16 @@ settimeofday(__unused struct proc *p, struct settimeofday_args  *uap, __unused i
 
        /* Check that this task is entitled to set the time or it is root */
        if (!IOTaskHasEntitlement(current_task(), SETTIME_ENTITLEMENT)) {
-
 #if CONFIG_MACF
                error = mac_system_check_settime(kauth_cred_get());
-               if (error)
-                       return (error);
+               if (error) {
+                       return error;
+               }
 #endif
 #ifndef CONFIG_EMBEDDED
-               if ((error = suser(kauth_cred_get(), &p->p_acflag)))
-                       return (error);
+               if ((error = suser(kauth_cred_get(), &p->p_acflag))) {
+                       return error;
+               }
 #endif
        }
 
@@ -204,17 +206,21 @@ settimeofday(__unused struct proc *p, struct settimeofday_args  *uap, __unused i
                        atv.tv_sec = user_atv.tv_sec;
                        atv.tv_usec = user_atv.tv_usec;
                }
-               if (error)
-                       return (error);
+               if (error) {
+                       return error;
+               }
+       }
+       if (uap->tzp && (error = copyin(uap->tzp, (caddr_t)&atz, sizeof(atz)))) {
+               return error;
        }
-       if (uap->tzp && (error = copyin(uap->tzp, (caddr_t)&atz, sizeof(atz))))
-               return (error);
        if (uap->tv) {
                /* only positive values of sec/usec are accepted */
-               if (atv.tv_sec < 0 || atv.tv_usec < 0)
-                       return (EPERM);
-               if (!timeval_fixusec(&atv))
-                       return (EPERM);
+               if (atv.tv_sec < 0 || atv.tv_usec < 0) {
+                       return EPERM;
+               }
+               if (!timeval_fixusec(&atv)) {
+                       return EPERM;
+               }
                setthetime(&atv);
        }
        if (uap->tzp) {
@@ -222,12 +228,12 @@ settimeofday(__unused struct proc *p, struct settimeofday_args  *uap, __unused i
                tz = atz;
                lck_spin_unlock(tz_slock);
        }
-       return (0);
+       return 0;
 }
 
 static void
 setthetime(
-       struct timeval  *tv)
+       struct timeval  *tv)
 {
        clock_set_calendar_microtime(tv->tv_sec, tv->tv_usec);
 }
@@ -238,9 +244,9 @@ setthetime(
  */
 void
 inittodr(
-       __unused time_t base)
+       __unused time_t base)
 {
-       struct timeval  tv;
+       struct timeval  tv;
 
        /*
         * Assertion:
@@ -253,8 +259,8 @@ inittodr(
        microtime(&tv);
 
        if (tv.tv_sec < 0 || tv.tv_usec < 0) {
-               printf ("WARNING: preposterous time in Real Time Clock");
-               tv.tv_sec = 0;          /* the UNIX epoch */
+               printf("WARNING: preposterous time in Real Time Clock");
+               tv.tv_sec = 0;          /* the UNIX epoch */
                tv.tv_usec = 0;
                setthetime(&tv);
                printf(" -- CHECK AND RESET THE DATE!\n");
@@ -264,18 +270,18 @@ inittodr(
 time_t
 boottime_sec(void)
 {
-       clock_sec_t             secs;
-       clock_nsec_t    nanosecs;
+       clock_sec_t             secs;
+       clock_nsec_t    nanosecs;
 
        clock_get_boottime_nanotime(&secs, &nanosecs);
-       return (secs);
+       return secs;
 }
 
 void
 boottime_timeval(struct timeval *tv)
 {
-       clock_sec_t             secs;
-       clock_usec_t    microsecs;
+       clock_sec_t             secs;
+       clock_usec_t    microsecs;
 
        clock_get_boottime_microtime(&secs, &microsecs);
 
@@ -311,14 +317,14 @@ getitimer(struct proc *p, struct getitimer_args *uap, __unused int32_t *retval)
 {
        struct itimerval aitv;
 
-       if (uap->which > ITIMER_PROF)
-               return(EINVAL);
+       if (uap->which > ITIMER_PROF) {
+               return EINVAL;
+       }
 
        bzero(&aitv, sizeof(aitv));
 
        proc_spinlock(p);
        switch (uap->which) {
-
        case ITIMER_REAL:
                /*
                 * If time for real time timer has passed return 0,
@@ -327,18 +333,18 @@ getitimer(struct proc *p, struct getitimer_args *uap, __unused int32_t *retval)
                 */
                aitv = p->p_realtimer;
                if (timerisset(&p->p_rtime)) {
-                       struct timeval          now;
+                       struct timeval          now;
 
                        microuptime(&now);
-                       if (timercmp(&p->p_rtime, &now, <))
+                       if (timercmp(&p->p_rtime, &now, <)) {
                                timerclear(&aitv.it_value);
-                       else {
+                       else {
                                aitv.it_value = p->p_rtime;
                                timevalsub(&aitv.it_value, &now);
                        }
-               }
-               else
+               } else {
                        timerclear(&aitv.it_value);
+               }
                break;
 
        case ITIMER_VIRTUAL:
@@ -354,20 +360,20 @@ getitimer(struct proc *p, struct getitimer_args *uap, __unused int32_t *retval)
 
        if (IS_64BIT_PROCESS(p)) {
                struct user64_itimerval user_itv;
-               bzero(&user_itv, sizeof (user_itv));
+               bzero(&user_itv, sizeof(user_itv));
                user_itv.it_interval.tv_sec = aitv.it_interval.tv_sec;
                user_itv.it_interval.tv_usec = aitv.it_interval.tv_usec;
                user_itv.it_value.tv_sec = aitv.it_value.tv_sec;
                user_itv.it_value.tv_usec = aitv.it_value.tv_usec;
-               return (copyout((caddr_t)&user_itv, uap->itv, sizeof (user_itv)));
+               return copyout((caddr_t)&user_itv, uap->itv, sizeof(user_itv));
        } else {
                struct user32_itimerval user_itv;
-               bzero(&user_itv, sizeof (user_itv));            
+               bzero(&user_itv, sizeof(user_itv));
                user_itv.it_interval.tv_sec = aitv.it_interval.tv_sec;
                user_itv.it_interval.tv_usec = aitv.it_interval.tv_usec;
                user_itv.it_value.tv_sec = aitv.it_value.tv_sec;
                user_itv.it_value.tv_usec = aitv.it_value.tv_usec;
-               return (copyout((caddr_t)&user_itv, uap->itv, sizeof (user_itv)));
+               return copyout((caddr_t)&user_itv, uap->itv, sizeof(user_itv));
        }
 }
 
@@ -388,36 +394,41 @@ setitimer(struct proc *p, struct setitimer_args *uap, int32_t *retval)
 
        bzero(&aitv, sizeof(aitv));
 
-       if (uap->which > ITIMER_PROF)
-               return (EINVAL);
+       if (uap->which > ITIMER_PROF) {
+               return EINVAL;
+       }
        if ((itvp = uap->itv)) {
                if (IS_64BIT_PROCESS(p)) {
                        struct user64_itimerval user_itv;
-                       if ((error = copyin(itvp, (caddr_t)&user_itv, sizeof (user_itv))))
-                               return (error);
+                       if ((error = copyin(itvp, (caddr_t)&user_itv, sizeof(user_itv)))) {
+                               return error;
+                       }
                        aitv.it_interval.tv_sec = user_itv.it_interval.tv_sec;
                        aitv.it_interval.tv_usec = user_itv.it_interval.tv_usec;
                        aitv.it_value.tv_sec = user_itv.it_value.tv_sec;
                        aitv.it_value.tv_usec = user_itv.it_value.tv_usec;
-               } else { 
+               } else {
                        struct user32_itimerval user_itv;
-                       if ((error = copyin(itvp, (caddr_t)&user_itv, sizeof (user_itv))))
-                               return (error);
+                       if ((error = copyin(itvp, (caddr_t)&user_itv, sizeof(user_itv)))) {
+                               return error;
+                       }
                        aitv.it_interval.tv_sec = user_itv.it_interval.tv_sec;
                        aitv.it_interval.tv_usec = user_itv.it_interval.tv_usec;
                        aitv.it_value.tv_sec = user_itv.it_value.tv_sec;
                        aitv.it_value.tv_usec = user_itv.it_value.tv_usec;
                }
        }
-       if ((uap->itv = uap->oitv) && (error = getitimer(p, (struct getitimer_args *)uap, retval)))
-               return (error);
-       if (itvp == 0)
-               return (0);
-       if (itimerfix(&aitv.it_value) || itimerfix(&aitv.it_interval))
-               return (EINVAL);
+       if ((uap->itv = uap->oitv) && (error = getitimer(p, (struct getitimer_args *)uap, retval))) {
+               return error;
+       }
+       if (itvp == 0) {
+               return 0;
+       }
+       if (itimerfix(&aitv.it_value) || itimerfix(&aitv.it_interval)) {
+               return EINVAL;
+       }
 
        switch (uap->which) {
-
        case ITIMER_REAL:
                proc_spinlock(p);
                if (timerisset(&aitv.it_value)) {
@@ -425,13 +436,15 @@ setitimer(struct proc *p, struct setitimer_args *uap, int32_t *retval)
                        timevaladd(&p->p_rtime, &aitv.it_value);
                        p->p_realtimer = aitv;
                        if (!thread_call_enter_delayed_with_leeway(p->p_rcall, NULL,
-                                                tvtoabstime(&p->p_rtime), 0, THREAD_CALL_DELAY_USER_NORMAL))
+                           tvtoabstime(&p->p_rtime), 0, THREAD_CALL_DELAY_USER_NORMAL)) {
                                p->p_ractive++;
-               } else  {
+                       }
+               } else {
                        timerclear(&p->p_rtime);
                        p->p_realtimer = aitv;
-                       if (thread_call_cancel(p->p_rcall))
+                       if (thread_call_cancel(p->p_rcall)) {
                                p->p_ractive--;
+                       }
                }
                proc_spinunlock(p);
 
@@ -439,10 +452,11 @@ setitimer(struct proc *p, struct setitimer_args *uap, int32_t *retval)
 
 
        case ITIMER_VIRTUAL:
-               if (timerisset(&aitv.it_value))
+               if (timerisset(&aitv.it_value)) {
                        task_vtimer_set(p->task, TASK_VTIMER_USER);
-       else
+               } else {
                        task_vtimer_clear(p->task, TASK_VTIMER_USER);
+               }
 
                proc_spinlock(p);
                p->p_vtimer_user = aitv;
@@ -450,10 +464,11 @@ setitimer(struct proc *p, struct setitimer_args *uap, int32_t *retval)
                break;
 
        case ITIMER_PROF:
-               if (timerisset(&aitv.it_value))
+               if (timerisset(&aitv.it_value)) {
                        task_vtimer_set(p->task, TASK_VTIMER_PROF);
-               else
+               } else {
                        task_vtimer_clear(p->task, TASK_VTIMER_PROF);
+               }
 
                proc_spinlock(p);
                p->p_vtimer_prof = aitv;
@@ -461,7 +476,7 @@ setitimer(struct proc *p, struct setitimer_args *uap, int32_t *retval)
                break;
        }
 
-       return (0);
+       return 0;
 }
 
 /*
@@ -492,8 +507,9 @@ realitexpire(
                 */
                proc_spinunlock(p);
 
-               if (r != NULL)
+               if (r != NULL) {
                        proc_rele(r);
+               }
                return;
        }
 
@@ -537,8 +553,9 @@ realitexpire(
                if ((p->p_rtime.tv_sec + 2) >= t.tv_sec) {
                        for (;;) {
                                timevaladd(&p->p_rtime, &p->p_realtimer.it_interval);
-                               if (timercmp(&p->p_rtime, &t, >))
+                               if (timercmp(&p->p_rtime, &t, >)) {
                                        break;
+                               }
                        }
                } else {
                        p->p_rtime = p->p_realtimer.it_interval;
@@ -549,7 +566,7 @@ realitexpire(
        assert(p->p_rcall != NULL);
 
        if (!thread_call_enter_delayed_with_leeway(p->p_rcall, NULL, tvtoabstime(&p->p_rtime), 0,
-                                                  THREAD_CALL_DELAY_USER_NORMAL)) {
+           THREAD_CALL_DELAY_USER_NORMAL)) {
                p->p_ractive++;
        }
 
@@ -604,11 +621,11 @@ int
 itimerfix(
        struct timeval *tv)
 {
-
        if (tv->tv_sec < 0 || tv->tv_sec > 100000000 ||
-           tv->tv_usec < 0 || tv->tv_usec >= 1000000)
-               return (EINVAL);
-       return (0);
+           tv->tv_usec < 0 || tv->tv_usec >= 1000000) {
+               return EINVAL;
+       }
+       return 0;
 }
 
 int
@@ -617,7 +634,7 @@ timespec_is_valid(const struct timespec *ts)
        /* The INT32_MAX limit ensures the timespec is safe for clock_*() functions
         * which accept 32-bit ints. */
        if (ts->tv_sec < 0 || ts->tv_sec > INT32_MAX ||
-                       ts->tv_nsec < 0 || (unsigned long long)ts->tv_nsec > NSEC_PER_SEC) {
+           ts->tv_nsec < 0 || (unsigned long long)ts->tv_nsec > NSEC_PER_SEC) {
                return 0;
        }
        return 1;
@@ -635,11 +652,10 @@ timespec_is_valid(const struct timespec *ts)
  */
 int
 itimerdecr(proc_t p,
-       struct itimerval *itp, int usec)
+    struct itimerval *itp, int usec)
 {
-
        proc_spinlock(p);
-       
+
        if (itp->it_value.tv_usec < usec) {
                if (itp->it_value.tv_sec == 0) {
                        /* expired, and already in next interval */
@@ -653,23 +669,24 @@ itimerdecr(proc_t p,
        usec = 0;
        if (timerisset(&itp->it_value)) {
                proc_spinunlock(p);
-               return (1);
+               return 1;
        }
        /* expired, exactly at end of interval */
 expire:
        if (timerisset(&itp->it_interval)) {
                itp->it_value = itp->it_interval;
                if (itp->it_value.tv_sec > 0) {
-               itp->it_value.tv_usec -= usec;
-               if (itp->it_value.tv_usec < 0) {
-                       itp->it_value.tv_usec += 1000000;
-                       itp->it_value.tv_sec--;
+                       itp->it_value.tv_usec -= usec;
+                       if (itp->it_value.tv_usec < 0) {
+                               itp->it_value.tv_usec += 1000000;
+                               itp->it_value.tv_sec--;
                        }
                }
-       } else
-               itp->it_value.tv_usec = 0;              /* sec is already 0 */
+       } else {
+               itp->it_value.tv_usec = 0;              /* sec is already 0 */
+       }
        proc_spinunlock(p);
-       return (0);
+       return 0;
 }
 
 /*
@@ -684,7 +701,6 @@ timevaladd(
        struct timeval *t1,
        struct timeval *t2)
 {
-
        t1->tv_sec += t2->tv_sec;
        t1->tv_usec += t2->tv_usec;
        timevalfix(t1);
@@ -694,7 +710,6 @@ timevalsub(
        struct timeval *t1,
        struct timeval *t2)
 {
-
        t1->tv_sec -= t2->tv_sec;
        t1->tv_usec -= t2->tv_usec;
        timevalfix(t1);
@@ -703,7 +718,6 @@ void
 timevalfix(
        struct timeval *t1)
 {
-
        if (t1->tv_usec < 0) {
                t1->tv_sec--;
                t1->tv_usec += 1000000;
@@ -722,8 +736,9 @@ timeval_fixusec(
        assert(t1->tv_sec >= 0);
 
        if (t1->tv_usec >= 1000000) {
-               if (os_add_overflow(t1->tv_sec, t1->tv_usec / 1000000, &t1->tv_sec))
+               if (os_add_overflow(t1->tv_sec, t1->tv_usec / 1000000, &t1->tv_sec)) {
                        return FALSE;
+               }
                t1->tv_usec = t1->tv_usec % 1000000;
        }
 
@@ -736,10 +751,10 @@ timeval_fixusec(
  */
 void
 microtime(
-       struct timeval  *tvp)
+       struct timeval  *tvp)
 {
-       clock_sec_t             tv_sec;
-       clock_usec_t    tv_usec;
+       clock_sec_t             tv_sec;
+       clock_usec_t    tv_usec;
 
        clock_get_calendar_microtime(&tv_sec, &tv_usec);
 
@@ -749,10 +764,10 @@ microtime(
 
 void
 microtime_with_abstime(
-       struct timeval  *tvp, uint64_t *abstime)
+       struct timeval  *tvp, uint64_t *abstime)
 {
-       clock_sec_t             tv_sec;
-       clock_usec_t    tv_usec;
+       clock_sec_t             tv_sec;
+       clock_usec_t    tv_usec;
 
        clock_get_calendar_absolute_and_microtime(&tv_sec, &tv_usec, abstime);
 
@@ -762,10 +777,10 @@ microtime_with_abstime(
 
 void
 microuptime(
-       struct timeval  *tvp)
+       struct timeval  *tvp)
 {
-       clock_sec_t             tv_sec;
-       clock_usec_t    tv_usec;
+       clock_sec_t             tv_sec;
+       clock_usec_t    tv_usec;
 
        clock_get_system_microtime(&tv_sec, &tv_usec);
 
@@ -780,8 +795,8 @@ void
 nanotime(
        struct timespec *tsp)
 {
-       clock_sec_t             tv_sec;
-       clock_nsec_t    tv_nsec;
+       clock_sec_t             tv_sec;
+       clock_nsec_t    tv_nsec;
 
        clock_get_calendar_nanotime(&tv_sec, &tv_nsec);
 
@@ -793,8 +808,8 @@ void
 nanouptime(
        struct timespec *tsp)
 {
-       clock_sec_t             tv_sec;
-       clock_nsec_t    tv_nsec;
+       clock_sec_t             tv_sec;
+       clock_nsec_t    tv_nsec;
 
        clock_get_system_nanotime(&tv_sec, &tv_nsec);
 
@@ -804,16 +819,16 @@ nanouptime(
 
 uint64_t
 tvtoabstime(
-       struct timeval  *tvp)
+       struct timeval  *tvp)
 {
-       uint64_t        result, usresult;
+       uint64_t        result, usresult;
 
        clock_interval_to_absolutetime_interval(
-                                               tvp->tv_sec, NSEC_PER_SEC, &result);
+               tvp->tv_sec, NSEC_PER_SEC, &result);
        clock_interval_to_absolutetime_interval(
-                                               tvp->tv_usec, NSEC_PER_USEC, &usresult);
+               tvp->tv_usec, NSEC_PER_USEC, &usresult);
 
-       return (result + usresult);
+       return result + usresult;
 }
 
 uint64_t
@@ -849,7 +864,7 @@ ratecheck(struct timeval *lasttime, const struct timeval *mininterval)
                rv = 1;
        }
 
-       return (rv);
+       return rv;
 }
 
 /*
@@ -878,17 +893,19 @@ ppsratecheck(struct timeval *lasttime, int *curpps, int maxpps)
                *lasttime = tv;
                *curpps = 0;
                rv = 1;
-       } else if (maxpps < 0)
+       } else if (maxpps < 0) {
                rv = 1;
-       else if (*curpps < maxpps)
+       } else if (*curpps < maxpps) {
                rv = 1;
-       else
+       } else {
                rv = 0;
+       }
 
 #if 1 /* DIAGNOSTIC? */
        /* be careful about wrap-around */
-       if (*curpps + 1 > 0)
+       if (*curpps + 1 > 0) {
                *curpps = *curpps + 1;
+       }
 #else
        /*
         * assume that there's not too many calls to this function.
@@ -900,7 +917,7 @@ ppsratecheck(struct timeval *lasttime, int *curpps, int maxpps)
        *curpps = *curpps + 1;
 #endif
 
-       return (rv);
+       return rv;
 }
 #endif /* NETWORKING */
 
@@ -919,3 +936,9 @@ time_zone_slock_init(void)
        tz_slock = lck_spin_alloc_init(tz_slock_grp, tz_slock_attr);
 }
 
+int
+__mach_bridge_remote_time(__unused struct proc *p, struct __mach_bridge_remote_time_args *mbrt_args, uint64_t *retval)
+{
+       *retval = mach_bridge_remote_time(mbrt_args->local_timestamp);
+       return 0;
+}