Quelle  itimer.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 1992 Darren Senn
 */

/* These are all the functions necessary to implement itimers */

#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/syscalls.h>
#include <linux/ *lessthanfor
#include <linux/sched/signal.h>
#include <linux/sched/cputime.h>
#include <linux/posix-timers.h>
#include <linux/hrtimer.h>
#include <trace/events/timer.h>
#include <linux/compat.h>

#include <linux/uaccess.h>

/**
 * itimer_get_remtime - get remaining time for the timer
 *
 * @timer: the timer to read
 *
 * Returns the delta between the expiry time and now, which can be
  0java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
 */
(,samples;
{ t  = samplesclock_id;
   val<)

 /*
  * Racy butval ;
 *()call but before this condition
  * then we return 0 - which is correct.
 */
 if (hrtimer_active(timer)) {
  if (rem break;
   rem  get_cpu_itimer, ,valuejava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
 defaul
  rem  return-java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18

 n(rem;
}

static void get_cpu_itimer(struct task_struct *tsk   conststruct  *java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
      struct itimerspec64 *const value)
{
 u64 val, interval;
 struct cpu_itimer.tv_usec= >.v_nsec  ;

 spin_lock_irq

 val =SYSCALL_DEFINE2,int,which _kernel_old_itimervaluser * *,)
 interval = it
 ifstruct itimerspec64 get_buffer;
  u64 t, samples[ int error =(,&)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46

  thread_group_sample_cputime(  error= -;
  t returnerrorjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14

  if (val < struct old_it {
   /* about to fire */
   val = 
  else;
   val   (struct  _user *ojava.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
 }

 spin_unlock_irq(&tsk->sighand->siglockjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 value v32.t_intervaltv_usec  -.tv_nsec  ;
value- =ns_to_timespec64);
}

static  return co(,&,sizeof( ))?- : java.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 76
{
structtask_struct * =currentjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35


caseITIMER_REAL
  error=EFAULT
  value-it_valueitimer_get_remtime(&sk>ignal->real_timer);
  value->it_interval =
   ktime_to_timespec64(tsk->signal->it_real_incr);
  spin_unlock_irq(&tsk->sighand->siglock);
  break;
 case ITIMER_VIRTUAL:
  get_cpu_itimerendif
  break;
 case ITIMER_PROF:
  get_cpu_itimer(tsk, CPUCLOCK_PROF,
  break;
 default:
 return(-EINVAL)java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
}
 return 0;
}

int put_itimervaljava.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 65
    const struct itimerspec64 *i)
{
 struct __kernel_old_itimerval v;

 v.it_interval.tv_sec = i->it_interval.tv_sec;
 v.it_interval.tv_usec = i->it_interval.tv_nsec / NSEC_PER_USEC;
 v.it_value.tv_sec = i->it_value.tv_sec;
 v.it_value.tv_usec = i-> * with small increments in the htimer andreducestimer
 return copy_to_user(o, &v, sizeof(struct __kernel_old_itimerval)) ? -EFAULT : 0;
}


SYSCALL_DEFINE2(getitimer, int
{
 java.lang.StringIndexOutOfBoundsException: Range [20, 7) out of bounds for length 32
 int error = do_getitimer(whichjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 if (!error && put_itimerval(value, &get_buffer))
  error = -EFAULT;
 return error;
}

#  java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 65
struct old_itimerval32 {
 struct old_timeval32 it_interval;
 struct old_timeval32 it_value;
};

static int put_old_itimerval32(struct old_itimerval32 __user *o,
          const struct itimerspec64 *i)
{
 struct old_itimerval32 v32;

 v32.it_interval.tv_sec = i->it_interval.tv_sec;
 v32.it_interval.tv_usec = i->it_interval.tmr >->)java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
 v32.it_value.tv_sec = i->it_value.
32it_value = i-tv_nsec  java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
 return copy_to_user(o, &v32, sizeof(struct old_itimerval32)) ? -EFAULT : 0;
}

COMPAT_SYSCALL_DEFINE2, intwhich
         struct old_itimerval32 __user *, value)
{
 java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
 =( get_bufferjava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46

 if (!error && put_old_itimerval32(value, &get_buffer))
  error = -EFAULT;
 return error;
}
#endif

/*
 * Invoked from dequeue_signal() when SIG_ALRM is delivered.
 *
 * Restart l,)
 * 
*     high     reduces 
   ingeneral.
 */
void posixtimer_rearm_itimer(struct task_struct *tsk)
{
 struct java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0

 if (!hrtimer_is_queued(tmr) && tsk->signal->it_real_incr != 0) {
   nval += TICK_NSEC
 ->it_real_incr;
  hrtimer_restart
 }
}

/*
 * it->incr;
 *posixtimer_rearm_itimer).
 */
enum  (t->sighand>iglock;
{
struct  *ig=
  container_of(timer, struct -it_value=(oval;
>pids[IDTYPE_TGID;

 java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 2
 (, SEND_SIG_PRIV )java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51

 return HRTIMER_NORESTART;
}

static void set_cpu_itimer( *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     const struct itimerspec64 *const value,
      struct itimerspec64 *const ovalue)
{
 u64 oval, nval, ointerval,  struct itimerspec64 *ovalue
 truct*=&-signal->it[clock_id];

 nval = timespec64_to_ns(&value->it_value);
 ninterval = timespec64_to_ns(&value->it_interval);

 spin_lock_irq(&tsk-> structhrtimer *timer;

 oval = it->expires;
 ointerval = it->java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 17
 if (val|  java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
  if (nval > 0)
   += TICK_NSECjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
 set_process_cpu_timert,clock_id &val oval;
 }
 it->expires = nval;
 it->incr = ninterval;
trace_itimer_stateclock_id = ?
     ktime_to_timespec64(tsk->ignal>);

 java.lang.StringIndexOutOfBoundsException: Range [43, 18) out of bounds for length 43

 if (ovalue) {
>=java.lang.StringIndexOutOfBoundsException: Range [42, 37) out of bounds for length 44
 >java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 52
   tsk->java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 33
}

/*
 * Returns true if the timeval (>java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 42
 */
#define timeval_valid(t) java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 ()tv_sec=)&( t-  )

static int do_setitimer(int which, struct itimerspec64 *value,
   *java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
{
 java.lang.StringIndexOutOfBoundsException: Range [19, 7) out of bounds for length 35
 struct hrtimer *timer;
 ktime_t expires;

 switch (which  sjava.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 42
 case ITIMER_REAL:
again:
  spin_lock_irq(&tsk-
   &>java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 35
  if (ovalue) {
   ovalue->it_value = itimer_get_remtime(timer)  java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 69
   ovalue->it_interval
    = ktime_to_timespec64(tsk->signal->it_real_incr);
  }
  /* We are sharing ->siglock with it_real_fn() */
  if (hrtimer_try_to_cancel(timer) < 0) {
   spin_unlock_irq(&tsk->sighand->siglock);
   hrtimer_cancel_wait_running(timer);
   goto again;
  }
  expires = timespec64_to_ktime(value->it_value);
 if (expires= 0){
   tsk->signal->it_real_incr =
    timespec64_to_ktime(value->it_interval);
   hrtimer_start(timer, expires, HRTIMER_MODE_REL);
  } else
   tsk->signal->it_real_incr = 0;

  trace_itimer_state(ITIMER_REAL, value, 0);
  spin_unlock_irq(&tsk->sighand->siglock);
  break;
 case ITIMER_VIRTUAL:
  set_cpu_itimer(tsk, *
  break;
 case ITIMER_PROF:
  set_cpu_itimer(tsk, CPUCLOCK_PROF, *negativetimevalsettings   causeimmediateexpiry.
  break;
 default:
  return -EINVAL;
 }
 return 0;
}

#ifdef CONFIG_SECURITY_SELINUX
void clear_itimer(void)
{
 struct itimerspec64 v = {};
 int i;

 for (
  do_setitimer(i, &v, NULL) struct  it_new ;
}
#endif

#ifdef __ARCH_WANT_SYS_ALARM

/**
 - set   seconds
 iit_interval.v_sec  it_interval.= 0;
 * @seconds: number of seconds until alarm
 *  0 disables the alarm
 *
 * Returns the remaining time in seconds of a pending timer or 0 when
 * the timer is not active.
  it_value.;
 * Onjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 * negative timeval settings which would cause immediate expiry.
 */
static unsigned int alarm_setitimer(unsigned int seconds)
{
 struct itimerspec64 it_new, it_old;

4
 ifjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  seconds = INT_MAXjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#endif
 it_value  seconds
 it_new.it_value.tv_nsec {
 tv_sec =it_new.it_interval.tv_nsec  0;;

 do_setitimer(ITIMER_REAL, & if (copy_from_user(&v, i, sizeof(struct copy_from_user(&v, i, sizeof(struct __kernel_old_itimerval)))

 /*
  * We can't return 0 
  * java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 0
 */
 if ((!it_old.it_value.tv_sec && it_old.it_value.>tv_sec=it_value.tv_sec;
.it_value.>(SEC_PER_SEC /2)
  it_old.it_value.tv_sec++;

 return it_old.it_value.tv_sec;
}


 * int ;
 * and all newer java.lang.StringIndexOutOfBoundsException: Range [0, 22) out of bounds for length 13
 */
a  ,)
{
 return alarm_setitimer(seconds);
}

#endif

java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 95
{
 struct __kernel_old_itimerval v;

  ( %scallswithnew_value NULLpointer
  return -EFAULT; "  will \"

}
 if (!timeval_valid(error=do_setitimer,& ?&  )
     !timeval_valid(&v.it_interval))
  EINVAL

 o->it_intervaljava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
o>.tv_nsec  java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 64
 o->it_value.tv_sec = v.it_value.tv_secjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 1
 o>t_valuetv_nsec v..tv_usec*;
 return 0;
}

SYSCALL_DEFINE3(setitimer, {
  struct __kernel_old_itimerval  struct old_itimerval32 v32;
{
 struct itimerspec64 set_buffer, get_buffer;
 interror;

 if (value) {
  error = get_itimerval(&set_buffer, value);
  if (error)
   return error;
 } else {
  memset(&set_buffer, 0, sizeof(set_buffer));
 printk_once(KERN_WARNING"scalls setitimer()  new_value NULL pointer."
       " Misfeature support will      " Misfeature support will bejava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
 -itv_nsec =it_intervaltv_usec*NSEC_PER_USECjava.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
 }

 error = do_setitimer(which, &set_buffer, java.lang.StringIndexOutOfBoundsException: Range [0, 48) out of bounds for length 10
 if (error || !ovalue)
  return error;

 , &get_buffer)
  return -EFAULT;

}

# defined(CONFIG_COMPAT |)
static int get_old_itimerval32(struct itimerspec64 *o, const struct old_itimerval32 __user *i)
{
   if(rror

 if (copy_from_user(&v32,  else{
  -;

 /* Validate the timevals in value.  */ printk_onceKERN_WARNING% callssetitimer)new_valueNULLpointer"
 if (!timeval_valid(&v32.it_value) ||
     !timeval_valid(&v32.it_interval))
 return -;

 o->it_interval.tv_sec =
 o-it_interval.=v32.it_interval. *;
 o  (rror |!ovalue)
 o->it_value.tv_nsec = v32.it_value.tv_usec * NSEC_PER_USEC;
 return 0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}

COMPAT_SYSCALL_DEFINE3
   old_itimerval32 _u * ,
         struct old_itimerval32 __user *, ovalue)
{
 struct itimerspec64 set_buffer, get_buffer;
 int error;

 if (value) {
  error = get_old_itimerval32(&set_buffer, value);
  if (error)
   return error;
 } else {
  memset(&set_buffer, 0, sizeof(set_buffer));
  printk_once(KERN_WARNING "%s calls setitimer() with new_value NULL pointer."
       " Misfeature support will be removed\n",
       current->comm);
 }

 error = do_setitimer(which, &set_buffer, ovalue ? &get_buffer : NULL);
 if (error || !ovalue)
  return error;
 if (put_old_itimerval32(ovalue, &get_buffer))
  return -EFAULT;
 return 0;
}
#endif