/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, 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
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * 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
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
*
* @(#)kern_time.c 8.4 (Berkeley) 5/26/95
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#include <sys/param.h>
#include <sys/resourcevar.h>
#include <sys/kernel.h>
#include <sys/systm.h>
-#include <sys/proc.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>
#include <sys/vnode.h>
-#include <sys/mount.h>
+#include <sys/mount_internal.h>
+#include <sys/sysproto.h>
+#include <sys/signalvar.h>
#include <kern/clock.h>
+#include <kern/task.h>
+#include <kern/thread_call.h>
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
#define HZ 100 /* XXX */
-volatile struct timeval time;
/* simple lock used to access timezone, tz structure */
-decl_simple_lock_data(, tz_slock);
+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;
+
+static void setthetime(
+ struct timeval *tv);
+
+void time_zone_slock_init(void) __attribute__((section("__TEXT, initcode")));
+
/*
* Time of day and interval timer support.
*
* and decrementing interval timers, optionally reloading the interval
* timers when they expire.
*/
-struct gettimeofday_args{
- struct timeval *tp;
- struct timezone *tzp;
-};
/* ARGSUSED */
int
-gettimeofday(p, uap, retval)
- struct proc *p;
- register struct gettimeofday_args *uap;
- register_t *retval;
+gettimeofday(
+__unused struct proc *p,
+ struct gettimeofday_args *uap,
+ register_t *retval)
{
- struct timeval atv;
int error = 0;
- extern simple_lock_data_t tz_slock;
struct timezone ltz; /* local copy */
-/* NOTE THIS implementation is for non ppc architectures only */
-
- if (uap->tp) {
- microtime(&atv);
- if (error = copyout((caddr_t)&atv, (caddr_t)uap->tp,
- sizeof (atv)))
- return(error);
- }
+ if (uap->tp)
+ clock_gettimeofday((uint32_t *)&retval[0], (uint32_t *)&retval[1]);
if (uap->tzp) {
- usimple_lock(&tz_slock);
+ lck_spin_lock(tz_slock);
ltz = tz;
- usimple_unlock(&tz_slock);
- error = copyout((caddr_t)<z, (caddr_t)uap->tzp,
- sizeof (tz));
+ lck_spin_unlock(tz_slock);
+
+ error = copyout((caddr_t)<z, CAST_USER_ADDR_T(uap->tzp), sizeof (tz));
}
- return(error);
+ return (error);
}
-struct settimeofday_args {
- struct timeval *tv;
- struct timezone *tzp;
-};
+/*
+ * XXX Y2038 bug because of setthetime() argument
+ */
/* ARGSUSED */
int
-settimeofday(p, uap, retval)
- struct proc *p;
- struct settimeofday_args *uap;
- register_t *retval;
+settimeofday(__unused struct proc *p, struct settimeofday_args *uap, __unused register_t *retval)
{
struct timeval atv;
struct timezone atz;
- int error, s;
- extern simple_lock_data_t tz_slock;
+ int error;
- if (error = suser(p->p_ucred, &p->p_acflag))
+#if CONFIG_MACF
+ error = mac_system_check_settime(kauth_cred_get());
+ if (error)
return (error);
- /* Verify all parameters before changing time. */
- if (uap->tv && (error = copyin((caddr_t)uap->tv,
- (caddr_t)&atv, sizeof(atv))))
+#endif
+#ifndef CONFIG_EMBEDDED
+ if ((error = suser(kauth_cred_get(), &p->p_acflag)))
return (error);
- if (uap->tzp && (error = copyin((caddr_t)uap->tzp,
- (caddr_t)&atz, sizeof(atz))))
+#endif
+ /* Verify all parameters before changing time */
+ if (uap->tv) {
+ if (IS_64BIT_PROCESS(p)) {
+ struct user_timeval user_atv;
+ error = copyin(uap->tv, &user_atv, sizeof(struct user_timeval));
+ atv.tv_sec = user_atv.tv_sec;
+ atv.tv_usec = user_atv.tv_usec;
+ } else {
+ error = copyin(uap->tv, &atv, sizeof(struct timeval));
+ }
+ if (error)
+ return (error);
+ }
+ if (uap->tzp && (error = copyin(uap->tzp, (caddr_t)&atz, sizeof(atz))))
return (error);
- if (uap->tv)
+ if (uap->tv) {
+ timevalfix(&atv);
+ if (atv.tv_sec < 0 || (atv.tv_sec == 0 && atv.tv_usec < 0))
+ return (EPERM);
setthetime(&atv);
+ }
if (uap->tzp) {
- usimple_lock(&tz_slock);
+ lck_spin_lock(tz_slock);
tz = atz;
- usimple_unlock(&tz_slock);
+ lck_spin_unlock(tz_slock);
}
return (0);
}
-setthetime(tv)
- struct timeval *tv;
+static void
+setthetime(
+ struct timeval *tv)
{
- long delta = tv->tv_sec - time.tv_sec;
- mach_timespec_t now;
-
- now.tv_sec = tv->tv_sec;
- now.tv_nsec = tv->tv_usec * NSEC_PER_USEC;
-
- clock_set_calendar_value(now);
- boottime.tv_sec += delta;
-#if NFSCLIENT || NFSSERVER
- lease_updatetime(delta);
-#endif
+ clock_set_calendar_microtime(tv->tv_sec, tv->tv_usec);
}
-#define tickadj (40 * NSEC_PER_USEC) /* "standard" skew, ns / 10 ms */
-#define bigadj (1 * NSEC_PER_SEC) /* use 10x skew above bigadj ns */
-
-struct adjtime_args {
- struct timeval *delta;
- struct timeval *olddelta;
-};
+/*
+ * XXX Y2038 bug because of clock_adjtime() first argument
+ */
/* ARGSUSED */
int
-adjtime(p, uap, retval)
- struct proc *p;
- register struct adjtime_args *uap;
- register_t *retval;
+adjtime(struct proc *p, struct adjtime_args *uap, __unused register_t *retval)
{
struct timeval atv;
- int64_t total;
- uint32_t delta;
int error;
- if (error = suser(p->p_ucred, &p->p_acflag))
+#if CONFIG_MACF
+ error = mac_system_check_settime(kauth_cred_get());
+ if (error)
return (error);
- if (error = copyin((caddr_t)uap->delta,
- (caddr_t)&atv, sizeof (struct timeval)))
+#endif
+ if ((error = suser(kauth_cred_get(), &p->p_acflag)))
+ return (error);
+ if (IS_64BIT_PROCESS(p)) {
+ struct user_timeval user_atv;
+ error = copyin(uap->delta, &user_atv, sizeof(struct user_timeval));
+ atv.tv_sec = user_atv.tv_sec;
+ atv.tv_usec = user_atv.tv_usec;
+ } else {
+ error = copyin(uap->delta, &atv, sizeof(struct timeval));
+ }
+ if (error)
return (error);
- /*
- * Compute the total correction and the rate at which to apply it.
- */
- total = (int64_t)atv.tv_sec * NSEC_PER_SEC + atv.tv_usec * NSEC_PER_USEC;
- if (total > bigadj || total < -bigadj)
- delta = 10 * tickadj;
- else
- delta = tickadj;
-
- total = clock_set_calendar_adjtime(total, delta);
+ /*
+ * Compute the total correction and the rate at which to apply it.
+ */
+ clock_adjtime((int32_t *)&atv.tv_sec, &atv.tv_usec);
if (uap->olddelta) {
- atv.tv_sec = total / NSEC_PER_SEC;
- atv.tv_usec = (total / NSEC_PER_USEC) % USEC_PER_SEC;
- (void) copyout((caddr_t)&atv,
- (caddr_t)uap->olddelta, sizeof (struct timeval));
+ if (IS_64BIT_PROCESS(p)) {
+ struct user_timeval user_atv;
+ user_atv.tv_sec = atv.tv_sec;
+ user_atv.tv_usec = atv.tv_usec;
+ error = copyout(&user_atv, uap->olddelta, sizeof(struct user_timeval));
+ } else {
+ error = copyout(&atv, uap->olddelta, sizeof(struct timeval));
+ }
}
return (0);
}
/*
- * Initialze the time of day register.
- * Trust the RTC except for the case where it is set before
- * the UNIX epoch. In that case use the the UNIX epoch.
- * The argument passed in is ignored.
+ * Verify the calendar value. If negative,
+ * reset to zero (the epoch).
*/
void
-inittodr(base)
- time_t base;
+inittodr(
+ __unused time_t base)
{
+ struct timeval tv;
+
/*
* Assertion:
* The calendar has already been
- * set up from the battery clock.
+ * set up from the platform clock.
*
* The value returned by microtime()
* is gotten from the calendar.
*/
- microtime(&time);
-
- /*
- * This variable still exists to keep
- * 'w' happy. It should only be considered
- * an approximation.
- */
- boottime.tv_sec = time.tv_sec;
- boottime.tv_usec = 0;
+ microtime(&tv);
- /*
- * If the RTC does not have acceptable value, i.e. time before
- * the UNIX epoch, set it to the UNIX epoch
- */
- if (time.tv_sec < 0) {
+ if (tv.tv_sec < 0 || tv.tv_usec < 0) {
printf ("WARNING: preposterous time in Real Time Clock");
- time.tv_sec = 0; /* the UNIX epoch */
- time.tv_usec = 0;
- setthetime(&time);
- boottime = time;
+ tv.tv_sec = 0; /* the UNIX epoch */
+ tv.tv_usec = 0;
+ setthetime(&tv);
printf(" -- CHECK AND RESET THE DATE!\n");
}
-
- return;
}
-void timevaladd(
- struct timeval *t1,
- struct timeval *t2);
-void timevalsub(
- struct timeval *t1,
- struct timeval *t2);
-void timevalfix(
- struct timeval *t1);
+time_t
+boottime_sec(void)
+{
+ uint32_t sec, nanosec;
+ clock_get_boottime_nanotime(&sec, &nanosec);
+ return (sec);
+}
-uint64_t
- tvtoabstime(
- struct timeval *tvp);
+uint64_t tvtoabstime(struct timeval *tvp);
/*
* Get value of an interval timer. The process virtual and
* is kept as an absolute time rather than as a delta, so that
* it is easy to keep periodic real-time signals from drifting.
*
- * Virtual time timers are processed in the hardclock() routine of
- * kern_clock.c. The real time timer is processed by a callout
- * routine. Since a callout may be delayed in real time due to
+ * The real time timer is processed by a callout routine.
+ * Since a callout may be delayed in real time due to
* other processing in the system, it is possible for the real
* time callout routine (realitexpire, given below), to be delayed
* in real time past when it is supposed to occur. It does not
* suffice, therefore, to reload the real time .it_value from the
* real time .it_interval. Rather, we compute the next time in
* absolute time when the timer should go off.
+ *
+ * Returns: 0 Success
+ * EINVAL Invalid argument
+ * copyout:EFAULT Bad address
*/
-
-struct getitimer_args {
- u_int which;
- struct itimerval *itv;
-};
/* ARGSUSED */
int
-getitimer(p, uap, retval)
- struct proc *p;
- register struct getitimer_args *uap;
- register_t *retval;
+getitimer(struct proc *p, struct getitimer_args *uap, __unused register_t *retval)
{
struct itimerval aitv;
if (uap->which > ITIMER_PROF)
return(EINVAL);
- if (uap->which == ITIMER_REAL) {
+
+ proc_spinlock(p);
+ switch (uap->which) {
+
+ case ITIMER_REAL:
/*
* If time for real time timer has passed return 0,
* else return difference between current time and
}
else
timerclear(&aitv.it_value);
+ break;
+
+ case ITIMER_VIRTUAL:
+ aitv = p->p_vtimer_user;
+ break;
+
+ case ITIMER_PROF:
+ aitv = p->p_vtimer_prof;
+ break;
}
- else
- aitv = p->p_stats->p_timer[uap->which];
- return (copyout((caddr_t)&aitv,
- (caddr_t)uap->itv, sizeof (struct itimerval)));
+ proc_spinunlock(p);
+
+ if (IS_64BIT_PROCESS(p)) {
+ struct user_itimerval 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 (struct user_itimerval)));
+ } else {
+ return (copyout((caddr_t)&aitv, uap->itv, sizeof (struct itimerval)));
+ }
}
-struct setitimer_args {
- u_int which;
- struct itimerval *itv;
- struct itimerval *oitv;
-};
+/*
+ * Returns: 0 Success
+ * EINVAL Invalid argument
+ * copyin:EFAULT Bad address
+ * getitimer:EINVAL Invalid argument
+ * getitimer:EFAULT Bad address
+ */
/* ARGSUSED */
int
-setitimer(p, uap, retval)
- struct proc *p;
- register struct setitimer_args *uap;
- register_t *retval;
+setitimer(struct proc *p, struct setitimer_args *uap, register_t *retval)
{
struct itimerval aitv;
- register struct itimerval *itvp;
+ user_addr_t itvp;
int error;
if (uap->which > ITIMER_PROF)
return (EINVAL);
- if ((itvp = uap->itv) &&
- (error = copyin((caddr_t)itvp,
- (caddr_t)&aitv, sizeof (struct itimerval))))
- return (error);
- if ((uap->itv = uap->oitv) && (error = getitimer(p, uap, retval)))
+ if ((itvp = uap->itv)) {
+ if (IS_64BIT_PROCESS(p)) {
+ struct user_itimerval user_itv;
+ if ((error = copyin(itvp, (caddr_t)&user_itv, sizeof (struct user_itimerval))))
+ 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 {
+ if ((error = copyin(itvp, (caddr_t)&aitv, sizeof (struct itimerval))))
+ return (error);
+ }
+ }
+ 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->which == ITIMER_REAL) {
- thread_call_func_cancel(realitexpire, (void *)p->p_pid, FALSE);
+
+ switch (uap->which) {
+
+ case ITIMER_REAL:
+ proc_spinlock(p);
if (timerisset(&aitv.it_value)) {
microuptime(&p->p_rtime);
timevaladd(&p->p_rtime, &aitv.it_value);
- thread_call_func_delayed(
- realitexpire, (void *)p->p_pid,
- tvtoabstime(&p->p_rtime));
+ p->p_realtimer = aitv;
+ if (!thread_call_enter_delayed(p->p_rcall, tvtoabstime(&p->p_rtime)))
+ p->p_ractive++;
+ } else {
+ timerclear(&p->p_rtime);
+ p->p_realtimer = aitv;
+ if (thread_call_cancel(p->p_rcall))
+ p->p_ractive--;
}
+ proc_spinunlock(p);
+
+ break;
+
+
+ case ITIMER_VIRTUAL:
+ if (timerisset(&aitv.it_value))
+ task_vtimer_set(p->task, TASK_VTIMER_USER);
+ else
+ task_vtimer_clear(p->task, TASK_VTIMER_USER);
+
+ proc_spinlock(p);
+ p->p_vtimer_user = aitv;
+ proc_spinunlock(p);
+ break;
+
+ case ITIMER_PROF:
+ if (timerisset(&aitv.it_value))
+ task_vtimer_set(p->task, TASK_VTIMER_PROF);
else
- timerclear(&p->p_rtime);
+ task_vtimer_clear(p->task, TASK_VTIMER_PROF);
- p->p_realtimer = aitv;
+ proc_spinlock(p);
+ p->p_vtimer_prof = aitv;
+ proc_spinunlock(p);
+ break;
}
- else
- p->p_stats->p_timer[uap->which] = aitv;
return (0);
}
*/
void
realitexpire(
- void *pid)
+ struct proc *p)
{
- register struct proc *p;
- struct timeval now;
- boolean_t funnel_state = thread_funnel_set(kernel_flock, TRUE);
+ struct proc *r;
+ struct timeval t;
- p = pfind((pid_t)pid);
- if (p == NULL) {
- (void) thread_funnel_set(kernel_flock, FALSE);
+ r = proc_find(p->p_pid);
+
+ proc_spinlock(p);
+
+ if (--p->p_ractive > 0 || r != p) {
+ proc_spinunlock(p);
+
+ if (r != NULL)
+ proc_rele(r);
return;
}
-
+
if (!timerisset(&p->p_realtimer.it_interval)) {
timerclear(&p->p_rtime);
- psignal(p, SIGALRM);
+ proc_spinunlock(p);
- (void) thread_funnel_set(kernel_flock, FALSE);
+ psignal(p, SIGALRM);
+ proc_rele(p);
return;
}
- microuptime(&now);
+ microuptime(&t);
timevaladd(&p->p_rtime, &p->p_realtimer.it_interval);
- if (timercmp(&p->p_rtime, &now, <=)) {
- if ((p->p_rtime.tv_sec + 2) >= now.tv_sec) {
+ if (timercmp(&p->p_rtime, &t, <=)) {
+ 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, &now, >))
+ if (timercmp(&p->p_rtime, &t, >))
break;
}
}
else {
p->p_rtime = p->p_realtimer.it_interval;
- timevaladd(&p->p_rtime, &now);
+ timevaladd(&p->p_rtime, &t);
}
}
- thread_call_func_delayed(realitexpire, pid, tvtoabstime(&p->p_rtime));
+ if (!thread_call_enter_delayed(p->p_rcall, tvtoabstime(&p->p_rtime)))
+ p->p_ractive++;
+ proc_spinunlock(p);
psignal(p, SIGALRM);
-
- (void) thread_funnel_set(kernel_flock, FALSE);
+ proc_rele(p);
}
/*
* Check that a proposed value to load into the .it_value or
- * .it_interval part of an interval timer is acceptable, and
- * fix it to have at least minimal value (i.e. if it is less
- * than the resolution of the clock, round it up.)
+ * .it_interval part of an interval timer is acceptable.
*/
int
-itimerfix(tv)
- struct timeval *tv;
+itimerfix(
+ struct timeval *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_usec != 0 && tv->tv_usec < tick)
- tv->tv_usec = tick;
return (0);
}
* 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.
*/
int
-itimerdecr(itp, usec)
- register struct itimerval *itp;
- int usec;
+itimerdecr(proc_t p,
+ 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 */
}
itp->it_value.tv_usec -= usec;
usec = 0;
- if (timerisset(&itp->it_value))
+ if (timerisset(&itp->it_value)) {
+ proc_spinunlock(p);
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--;
+ }
}
} else
itp->it_value.tv_usec = 0; /* sec is already 0 */
+ proc_spinunlock(p);
return (0);
}
microtime(
struct timeval *tvp)
{
- mach_timespec_t now = clock_get_calendar_value();
-
- tvp->tv_sec = now.tv_sec;
- tvp->tv_usec = now.tv_nsec / NSEC_PER_USEC;
+ clock_get_calendar_microtime((uint32_t *)&tvp->tv_sec, (uint32_t *)&tvp->tv_usec);
}
void
microuptime(
struct timeval *tvp)
{
- mach_timespec_t now = clock_get_system_value();
-
- tvp->tv_sec = now.tv_sec;
- tvp->tv_usec = now.tv_nsec / NSEC_PER_USEC;
+ clock_get_system_microtime((uint32_t *)&tvp->tv_sec, (uint32_t *)&tvp->tv_usec);
}
/*
nanotime(
struct timespec *tsp)
{
- mach_timespec_t now = clock_get_calendar_value();
-
- tsp->tv_sec = now.tv_sec;
- tsp->tv_nsec = now.tv_nsec;
+ clock_get_calendar_nanotime((uint32_t *)&tsp->tv_sec, (uint32_t *)&tsp->tv_nsec);
}
void
nanouptime(
struct timespec *tsp)
{
- mach_timespec_t now = clock_get_system_value();
-
- tsp->tv_sec = now.tv_sec;
- tsp->tv_nsec = now.tv_nsec;
+ clock_get_system_nanotime((uint32_t *)&tsp->tv_sec, (uint32_t *)&tsp->tv_nsec);
}
uint64_t
void
time_zone_slock_init(void)
{
- extern simple_lock_data_t tz_slock;
+ /* allocate lock group attribute and group */
+ tz_slock_grp_attr = lck_grp_attr_alloc_init();
- simple_lock_init(&tz_slock);
+ tz_slock_grp = lck_grp_alloc_init("tzlock", tz_slock_grp_attr);
+ /* Allocate lock attribute */
+ tz_slock_attr = lck_attr_alloc_init();
+ /* Allocate the spin lock */
+ tz_slock = lck_spin_alloc_init(tz_slock_grp, tz_slock_attr);
}
projects / apple / xnu.git / blobdiff