/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
*
* @(#)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/proc_internal.h>
#include <sys/kauth.h>
#include <sys/vnode.h>
+#include <sys/time.h>
+#include <sys/priv.h>
#include <sys/mount_internal.h>
#include <sys/sysproto.h>
#include <sys/signalvar.h>
+#include <sys/protosw.h> /* for net_uptime2timeval() */
#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 */
void time_zone_slock_init(void);
-int gettimeofday(struct proc *p,
-#ifdef __ppc__
- struct ppc_gettimeofday_args *uap,
-#else
- struct gettimeofday_args *uap,
-#endif
- register_t *retval);
-
/*
* Time of day and interval timer support.
*
* here provide support for adding and subtracting timeval structures
* and decrementing interval timers, optionally reloading the interval
* timers when they expire.
- *
- * XXX Y2038 bug because of clock_get_calendar_microtime() first argument
*/
/* ARGSUSED */
int
-gettimeofday(__unused struct proc *p,
-#ifdef __ppc__
- register struct ppc_gettimeofday_args *uap,
-#else
- register struct gettimeofday_args *uap,
-#endif
- __unused register_t *retval)
+gettimeofday(
+__unused struct proc *p,
+ struct gettimeofday_args *uap,
+ int32_t *retval)
{
- struct timeval atv;
int error = 0;
struct timezone ltz; /* local copy */
-/* NOTE THIS implementation is for non ppc architectures only */
-
if (uap->tp) {
- clock_get_calendar_microtime((uint32_t *)&atv.tv_sec, &atv.tv_usec);
- if (IS_64BIT_PROCESS(p)) {
- struct user_timeval user_atv;
- user_atv.tv_sec = atv.tv_sec;
- user_atv.tv_usec = atv.tv_usec;
- /*
- * This cast is not necessary for PPC, but is
- * mostly harmless.
- */
- error = copyout(&user_atv, CAST_USER_ADDR_T(uap->tp), sizeof(struct user_timeval));
- } else {
- error = copyout(&atv, CAST_USER_ADDR_T(uap->tp), sizeof(struct timeval));
- }
- if (error)
- return(error);
+ clock_sec_t secs;
+ clock_usec_t usecs;
+
+ clock_gettimeofday(&secs, &usecs);
+ retval[0] = secs;
+ retval[1] = usecs;
}
if (uap->tzp) {
lck_spin_lock(tz_slock);
ltz = tz;
lck_spin_unlock(tz_slock);
- error = copyout((caddr_t)<z, CAST_USER_ADDR_T(uap->tzp),
- sizeof (tz));
+
+ error = copyout((caddr_t)<z, CAST_USER_ADDR_T(uap->tzp), sizeof (tz));
}
- return(error);
+ return (error);
}
/*
*/
/* ARGSUSED */
int
-settimeofday(struct proc *p, struct settimeofday_args *uap, __unused register_t *retval)
+settimeofday(__unused struct proc *p, struct settimeofday_args *uap, __unused int32_t *retval)
{
struct timeval atv;
struct timezone atz;
int error;
+ bzero(&atv, sizeof(atv));
+
+#if CONFIG_MACF
+ error = mac_system_check_settime(kauth_cred_get());
+ if (error)
+ return (error);
+#endif
if ((error = suser(kauth_cred_get(), &p->p_acflag)))
return (error);
/* 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));
+ struct user64_timeval user_atv;
+ error = copyin(uap->tv, &user_atv, sizeof(user_atv));
atv.tv_sec = user_atv.tv_sec;
atv.tv_usec = user_atv.tv_usec;
} else {
- error = copyin(uap->tv, &atv, sizeof(struct timeval));
+ struct user32_timeval user_atv;
+ error = copyin(uap->tv, &user_atv, sizeof(user_atv));
+ atv.tv_sec = user_atv.tv_sec;
+ atv.tv_usec = user_atv.tv_usec;
}
if (error)
return (error);
*/
/* ARGSUSED */
int
-adjtime(struct proc *p, register struct adjtime_args *uap, __unused register_t *retval)
+adjtime(struct proc *p, struct adjtime_args *uap, __unused int32_t *retval)
{
struct timeval atv;
int error;
- if ((error = suser(kauth_cred_get(), &p->p_acflag)))
+#if CONFIG_MACF
+ error = mac_system_check_settime(kauth_cred_get());
+ if (error)
+ return (error);
+#endif
+ if ((error = priv_check_cred(kauth_cred_get(), PRIV_ADJTIME, 0)))
return (error);
if (IS_64BIT_PROCESS(p)) {
- struct user_timeval user_atv;
- error = copyin(uap->delta, &user_atv, sizeof(struct user_timeval));
+ struct user64_timeval user_atv;
+ error = copyin(uap->delta, &user_atv, sizeof(user_atv));
atv.tv_sec = user_atv.tv_sec;
atv.tv_usec = user_atv.tv_usec;
} else {
- error = copyin(uap->delta, &atv, sizeof(struct timeval));
+ struct user32_timeval user_atv;
+ error = copyin(uap->delta, &user_atv, sizeof(user_atv));
+ atv.tv_sec = user_atv.tv_sec;
+ atv.tv_usec = user_atv.tv_usec;
}
if (error)
return (error);
/*
* Compute the total correction and the rate at which to apply it.
*/
- clock_adjtime((int32_t *)&atv.tv_sec, &atv.tv_usec);
+ clock_adjtime(&atv.tv_sec, &atv.tv_usec);
if (uap->olddelta) {
if (IS_64BIT_PROCESS(p)) {
- struct user_timeval user_atv;
+ struct user64_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));
+ error = copyout(&user_atv, uap->olddelta, sizeof(user_atv));
} else {
- error = copyout(&atv, uap->olddelta, sizeof(struct timeval));
+ struct user32_timeval user_atv;
+ user_atv.tv_sec = atv.tv_sec;
+ user_atv.tv_usec = atv.tv_usec;
+ error = copyout(&user_atv, uap->olddelta, sizeof(user_atv));
}
}
time_t
boottime_sec(void)
{
- uint32_t sec, nanosec;
- clock_get_boottime_nanotime(&sec, &nanosec);
- return (sec);
-}
+ clock_sec_t secs;
+ clock_nsec_t nanosecs;
-uint64_t tvtoabstime(struct timeval *tvp);
+ clock_get_boottime_nanotime(&secs, &nanosecs);
+ return (secs);
+}
/*
* 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
*/
-
/* ARGSUSED */
int
-getitimer(struct proc *p, register struct getitimer_args *uap, __unused register_t *retval)
+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_REAL) {
+
+ bzero(&aitv, sizeof(aitv));
+
+ 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];
+
+ proc_spinunlock(p);
if (IS_64BIT_PROCESS(p)) {
- struct user_itimerval user_itv;
+ struct user64_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)));
+ return (copyout((caddr_t)&user_itv, uap->itv, sizeof (user_itv)));
} else {
- return (copyout((caddr_t)&aitv, uap->itv, sizeof (struct itimerval)));
+ struct user32_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 (user_itv)));
}
}
+/*
+ * 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, int32_t *retval)
{
struct itimerval aitv;
user_addr_t itvp;
int error;
+ bzero(&aitv, sizeof(aitv));
+
if (uap->which > ITIMER_PROF)
return (EINVAL);
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))))
+ struct user64_itimerval user_itv;
+ 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 {
- if ((error = copyin(itvp, (caddr_t)&aitv, sizeof (struct itimerval))))
+ struct user32_itimerval user_itv;
+ 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 (0);
if (itimerfix(&aitv.it_value) || itimerfix(&aitv.it_interval))
return (EINVAL);
- if (uap->which == ITIMER_REAL) {
- thread_call_func_cancel((thread_call_func_t)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(
- (thread_call_func_t)realitexpire, (void *)p->p_pid,
- tvtoabstime(&p->p_rtime));
+ 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))
+ 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;
-
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
- p = pfind((pid_t)pid);
- if (p == NULL) {
- (void) thread_funnel_set(kernel_flock, FALSE);
+ struct proc *r;
+ struct timeval t;
+
+ 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);
}
}
- psignal(p, SIGALRM);
-
- thread_call_func_delayed((thread_call_func_t)realitexpire, pid, tvtoabstime(&p->p_rtime));
+ if (!thread_call_enter_delayed(p->p_rcall, tvtoabstime(&p->p_rtime)))
+ p->p_ractive++;
+ proc_spinunlock(p);
- (void) thread_funnel_set(kernel_flock, FALSE);
+ psignal(p, SIGALRM);
+ 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);
}
+int
+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) {
+ return 0;
+ }
+ return 1;
+}
+
/*
* Decrement an interval timer by a specified number
* 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)
{
- clock_get_calendar_microtime((uint32_t *)&tvp->tv_sec, &tvp->tv_usec);
+ clock_sec_t tv_sec;
+ clock_usec_t tv_usec;
+
+ clock_get_calendar_microtime(&tv_sec, &tv_usec);
+
+ tvp->tv_sec = tv_sec;
+ tvp->tv_usec = tv_usec;
+}
+
+void
+microtime_with_abstime(
+ struct timeval *tvp, uint64_t *abstime)
+{
+ clock_sec_t tv_sec;
+ clock_usec_t tv_usec;
+
+ clock_get_calendar_absolute_and_microtime(&tv_sec, &tv_usec, abstime);
+
+ tvp->tv_sec = tv_sec;
+ tvp->tv_usec = tv_usec;
}
void
microuptime(
struct timeval *tvp)
{
- clock_get_system_microtime((uint32_t *)&tvp->tv_sec, &tvp->tv_usec);
+ clock_sec_t tv_sec;
+ clock_usec_t tv_usec;
+
+ clock_get_system_microtime(&tv_sec, &tv_usec);
+
+ tvp->tv_sec = tv_sec;
+ tvp->tv_usec = tv_usec;
}
/*
nanotime(
struct timespec *tsp)
{
- clock_get_calendar_nanotime((uint32_t *)&tsp->tv_sec, (uint32_t *)&tsp->tv_nsec);
+ clock_sec_t tv_sec;
+ clock_nsec_t tv_nsec;
+
+ clock_get_calendar_nanotime(&tv_sec, &tv_nsec);
+
+ tsp->tv_sec = tv_sec;
+ tsp->tv_nsec = tv_nsec;
}
void
nanouptime(
struct timespec *tsp)
{
- clock_get_system_nanotime((uint32_t *)&tsp->tv_sec, (uint32_t *)&tsp->tv_nsec);
+ clock_sec_t tv_sec;
+ clock_nsec_t tv_nsec;
+
+ clock_get_system_nanotime(&tv_sec, &tv_nsec);
+
+ tsp->tv_sec = tv_sec;
+ tsp->tv_nsec = tv_nsec;
}
uint64_t
return (result + usresult);
}
+
+uint64_t
+tstoabstime(struct timespec *ts)
+{
+ uint64_t abstime_s, abstime_ns;
+ clock_interval_to_absolutetime_interval(ts->tv_sec, NSEC_PER_SEC, &abstime_s);
+ clock_interval_to_absolutetime_interval(ts->tv_nsec, 1, &abstime_ns);
+ return abstime_s + abstime_ns;
+}
+
+#if NETWORKING
+/*
+ * ratecheck(): simple time-based rate-limit checking.
+ */
+int
+ratecheck(struct timeval *lasttime, const struct timeval *mininterval)
+{
+ struct timeval tv, delta;
+ int rv = 0;
+
+ net_uptime2timeval(&tv);
+ delta = tv;
+ timevalsub(&delta, lasttime);
+
+ /*
+ * check for 0,0 is so that the message will be seen at least once,
+ * even if interval is huge.
+ */
+ if (timevalcmp(&delta, mininterval, >=) ||
+ (lasttime->tv_sec == 0 && lasttime->tv_usec == 0)) {
+ *lasttime = tv;
+ rv = 1;
+ }
+
+ return (rv);
+}
+
+/*
+ * ppsratecheck(): packets (or events) per second limitation.
+ */
+int
+ppsratecheck(struct timeval *lasttime, int *curpps, int maxpps)
+{
+ struct timeval tv, delta;
+ int rv;
+
+ net_uptime2timeval(&tv);
+
+ timersub(&tv, lasttime, &delta);
+
+ /*
+ * Check for 0,0 so that the message will be seen at least once.
+ * If more than one second has passed since the last update of
+ * lasttime, reset the counter.
+ *
+ * we do increment *curpps even in *curpps < maxpps case, as some may
+ * try to use *curpps for stat purposes as well.
+ */
+ if ((lasttime->tv_sec == 0 && lasttime->tv_usec == 0) ||
+ delta.tv_sec >= 1) {
+ *lasttime = tv;
+ *curpps = 0;
+ rv = 1;
+ } else if (maxpps < 0)
+ rv = 1;
+ else if (*curpps < maxpps)
+ rv = 1;
+ else
+ rv = 0;
+
+#if 1 /* DIAGNOSTIC? */
+ /* be careful about wrap-around */
+ if (*curpps + 1 > 0)
+ *curpps = *curpps + 1;
+#else
+ /*
+ * assume that there's not too many calls to this function.
+ * not sure if the assumption holds, as it depends on *caller's*
+ * behavior, not the behavior of this function.
+ * IMHO it is wrong to make assumption on the caller's behavior,
+ * so the above #if is #if 1, not #ifdef DIAGNOSTIC.
+ */
+ *curpps = *curpps + 1;
+#endif
+
+ return (rv);
+}
+#endif /* NETWORKING */
+
void
time_zone_slock_init(void)
{
/* allocate lock group attribute and group */
tz_slock_grp_attr = lck_grp_attr_alloc_init();
- lck_grp_attr_setstat(tz_slock_grp_attr);
tz_slock_grp = lck_grp_alloc_init("tzlock", tz_slock_grp_attr);
/* Allocate lock attribute */
tz_slock_attr = lck_attr_alloc_init();
- //lck_attr_setdebug(tz_slock_attr);
/* Allocate the spin lock */
tz_slock = lck_spin_alloc_init(tz_slock_grp, tz_slock_attr);
}
-
projects / apple / xnu.git / blobdiff