#include <sys/param.h>
#include <sys/resourcevar.h>
#include <sys/kernel.h>
#include <sys/systm.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>
#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
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);
int
gettimeofday(
struct proc *p,
struct gettimeofday_args *uap,
__unused int32_t *retval)
{
int error = 0;
struct timezone ltz;
clock_sec_t secs;
clock_usec_t usecs;
uint64_t mach_time;
if (uap->tp || uap->mach_absolute_time) {
clock_gettimeofday_and_absolute_time(&secs, &usecs, &mach_time);
}
if (uap->tp) {
if (IS_64BIT_PROCESS(p)) {
struct user64_timeval user_atv = {};
user_atv.tv_sec = (uint32_t)secs;
user_atv.tv_usec = usecs;
error = copyout(&user_atv, uap->tp, sizeof(user_atv));
} else {
struct user32_timeval user_atv = {};
user_atv.tv_sec = (uint32_t)secs;
user_atv.tv_usec = usecs;
error = copyout(&user_atv, uap->tp, sizeof(user_atv));
}
if (error) {
return error;
}
}
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));
}
if (error == 0 && uap->mach_absolute_time) {
error = copyout(&mach_time, uap->mach_absolute_time, sizeof(mach_time));
}
return error;
}
int
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);
if (uap->tv) {
if (IS_64BIT_PROCESS(p)) {
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 {
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);
}
if (uap->tzp && (error = copyin(uap->tzp, (caddr_t)&atz, sizeof(atz))))
return (error);
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) {
lck_spin_lock(tz_slock);
tz = atz;
lck_spin_unlock(tz_slock);
}
return (0);
}
static void
setthetime(
struct timeval *tv)
{
clock_set_calendar_microtime(tv->tv_sec, tv->tv_usec);
}
int
adjtime(struct proc *p, struct adjtime_args *uap, __unused int32_t *retval)
{
struct timeval atv;
int error;
#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 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 {
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);
clock_adjtime(&atv.tv_sec, &atv.tv_usec);
if (uap->olddelta) {
if (IS_64BIT_PROCESS(p)) {
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(user_atv));
} else {
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));
}
}
return (0);
}
void
inittodr(
__unused time_t base)
{
struct timeval tv;
microtime(&tv);
if (tv.tv_sec < 0 || tv.tv_usec < 0) {
printf ("WARNING: preposterous time in Real Time Clock");
tv.tv_sec = 0;
tv.tv_usec = 0;
setthetime(&tv);
printf(" -- CHECK AND RESET THE DATE!\n");
}
}
time_t
boottime_sec(void)
{
clock_sec_t secs;
clock_nsec_t nanosecs;
clock_get_boottime_nanotime(&secs, &nanosecs);
return (secs);
}
void
boottime_timeval(struct timeval *tv)
{
clock_sec_t secs;
clock_usec_t microsecs;
clock_get_boottime_microtime(&secs, µsecs);
tv->tv_sec = secs;
tv->tv_usec = microsecs;
}
int
getitimer(struct proc *p, struct getitimer_args *uap, __unused int32_t *retval)
{
struct itimerval aitv;
if (uap->which > ITIMER_PROF)
return(EINVAL);
bzero(&aitv, sizeof(aitv));
proc_spinlock(p);
switch (uap->which) {
case ITIMER_REAL:
aitv = p->p_realtimer;
if (timerisset(&p->p_rtime)) {
struct timeval now;
microuptime(&now);
if (timercmp(&p->p_rtime, &now, <))
timerclear(&aitv.it_value);
else {
aitv.it_value = p->p_rtime;
timevalsub(&aitv.it_value, &now);
}
}
else
timerclear(&aitv.it_value);
break;
case ITIMER_VIRTUAL:
aitv = p->p_vtimer_user;
break;
case ITIMER_PROF:
aitv = p->p_vtimer_prof;
break;
}
proc_spinunlock(p);
if (IS_64BIT_PROCESS(p)) {
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 (user_itv)));
} else {
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)));
}
}
int
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 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 {
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 (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)) {
microuptime(&p->p_rtime);
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))
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
task_vtimer_clear(p->task, TASK_VTIMER_PROF);
proc_spinlock(p);
p->p_vtimer_prof = aitv;
proc_spinunlock(p);
break;
}
return (0);
}
void
realitexpire(
struct proc *p)
{
struct proc *r;
struct timeval t;
r = proc_find(p->p_pid);
proc_spinlock(p);
assert(p->p_ractive > 0);
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);
proc_spinunlock(p);
psignal(p, SIGALRM);
proc_rele(p);
return;
}
proc_spinunlock(p);
psignal(p, SIGALRM);
proc_spinlock(p);
if (!timerisset(&p->p_realtimer.it_interval)) {
timerclear(&p->p_rtime);
proc_spinunlock(p);
proc_rele(p);
return;
}
microuptime(&t);
timevaladd(&p->p_rtime, &p->p_realtimer.it_interval);
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, &t, >))
break;
}
} else {
p->p_rtime = p->p_realtimer.it_interval;
timevaladd(&p->p_rtime, &t);
}
}
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)) {
p->p_ractive++;
}
proc_spinunlock(p);
proc_rele(p);
}
void
proc_free_realitimer(proc_t p)
{
proc_spinlock(p);
assert(p->p_rcall != NULL);
assert(p->p_refcount == 0);
timerclear(&p->p_realtimer.it_interval);
if (thread_call_cancel(p->p_rcall)) {
assert(p->p_ractive > 0);
p->p_ractive--;
}
while (p->p_ractive > 0) {
proc_spinunlock(p);
delay(1);
proc_spinlock(p);
}
thread_call_t call = p->p_rcall;
p->p_rcall = NULL;
proc_spinunlock(p);
thread_call_free(call);
}
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);
}
int
timespec_is_valid(const struct timespec *ts)
{
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;
}
int
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) {
usec -= itp->it_value.tv_usec;
goto expire;
}
itp->it_value.tv_usec += 1000000;
itp->it_value.tv_sec--;
}
itp->it_value.tv_usec -= usec;
usec = 0;
if (timerisset(&itp->it_value)) {
proc_spinunlock(p);
return (1);
}
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;
proc_spinunlock(p);
return (0);
}
void
timevaladd(
struct timeval *t1,
struct timeval *t2)
{
t1->tv_sec += t2->tv_sec;
t1->tv_usec += t2->tv_usec;
timevalfix(t1);
}
void
timevalsub(
struct timeval *t1,
struct timeval *t2)
{
t1->tv_sec -= t2->tv_sec;
t1->tv_usec -= t2->tv_usec;
timevalfix(t1);
}
void
timevalfix(
struct timeval *t1)
{
if (t1->tv_usec < 0) {
t1->tv_sec--;
t1->tv_usec += 1000000;
}
if (t1->tv_usec >= 1000000) {
t1->tv_sec++;
t1->tv_usec -= 1000000;
}
}
void
microtime(
struct timeval *tvp)
{
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_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;
}
void
nanotime(
struct timespec *tsp)
{
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_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
tvtoabstime(
struct timeval *tvp)
{
uint64_t result, usresult;
clock_interval_to_absolutetime_interval(
tvp->tv_sec, NSEC_PER_SEC, &result);
clock_interval_to_absolutetime_interval(
tvp->tv_usec, NSEC_PER_USEC, &usresult);
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
int
ratecheck(struct timeval *lasttime, const struct timeval *mininterval)
{
struct timeval tv, delta;
int rv = 0;
net_uptime2timeval(&tv);
delta = tv;
timevalsub(&delta, lasttime);
if (timevalcmp(&delta, mininterval, >=) ||
(lasttime->tv_sec == 0 && lasttime->tv_usec == 0)) {
*lasttime = tv;
rv = 1;
}
return (rv);
}
int
ppsratecheck(struct timeval *lasttime, int *curpps, int maxpps)
{
struct timeval tv, delta;
int rv;
net_uptime2timeval(&tv);
timersub(&tv, lasttime, &delta);
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
if (*curpps + 1 > 0)
*curpps = *curpps + 1;
#else
*curpps = *curpps + 1;
#endif
return (rv);
}
#endif
void
time_zone_slock_init(void)
{
tz_slock_grp_attr = lck_grp_attr_alloc_init();
tz_slock_grp = lck_grp_alloc_init("tzlock", tz_slock_grp_attr);
tz_slock_attr = lck_attr_alloc_init();
tz_slock = lck_spin_alloc_init(tz_slock_grp, tz_slock_attr);
}