The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_time.c

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    1 /*      $NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Emmanuel Dreyfus.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/10.4/sys/compat/linux/linux_time.c 315658 2017-03-21 01:24:56Z vangyzen $");
   34 #if 0
   35 __KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $");
   36 #endif
   37 
   38 #include "opt_compat.h"
   39 #include "opt_kdtrace.h"
   40 
   41 #include <sys/param.h>
   42 #include <sys/kernel.h>
   43 #include <sys/lock.h>
   44 #include <sys/ucred.h>
   45 #include <sys/mount.h>
   46 #include <sys/mutex.h>
   47 #include <sys/resourcevar.h>
   48 #include <sys/sdt.h>
   49 #include <sys/signal.h>
   50 #include <sys/stdint.h>
   51 #include <sys/syscallsubr.h>
   52 #include <sys/sysproto.h>
   53 #include <sys/time.h>
   54 #include <sys/systm.h>
   55 #include <sys/proc.h>
   56 
   57 #ifdef COMPAT_LINUX32
   58 #include <machine/../linux32/linux.h>
   59 #include <machine/../linux32/linux32_proto.h>
   60 #else
   61 #include <machine/../linux/linux.h>
   62 #include <machine/../linux/linux_proto.h>
   63 #endif
   64 
   65 #include <compat/linux/linux_dtrace.h>
   66 #include <compat/linux/linux_timer.h>
   67 
   68 /* DTrace init */
   69 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
   70 
   71 /**
   72  * DTrace probes in this module.
   73  */
   74 LIN_SDT_PROBE_DEFINE2(time, native_to_linux_timespec, entry,
   75     "struct l_timespec *", "struct timespec *");
   76 LIN_SDT_PROBE_DEFINE0(time, native_to_linux_timespec, return);
   77 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_timespec, entry,
   78     "struct timespec *", "struct l_timespec *");
   79 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_timespec, return, "int");
   80 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_clockid, entry, "clockid_t *",
   81     "clockid_t");
   82 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unsupported_clockid,
   83     "clockid_t");
   84 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unknown_clockid,
   85     "clockid_t");
   86 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, return, "int");
   87 LIN_SDT_PROBE_DEFINE2(time, linux_clock_gettime, entry, "clockid_t",
   88     "struct l_timespec *");
   89 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, conversion_error, "int");
   90 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, gettime_error, "int");
   91 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, copyout_error, "int");
   92 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, return, "int");
   93 LIN_SDT_PROBE_DEFINE2(time, linux_clock_settime, entry, "clockid_t",
   94     "struct l_timespec *");
   95 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, conversion_error, "int");
   96 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, settime_error, "int");
   97 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, copyin_error, "int");
   98 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, return, "int");
   99 LIN_SDT_PROBE_DEFINE2(time, linux_clock_getres, entry, "clockid_t",
  100     "struct l_timespec *");
  101 LIN_SDT_PROBE_DEFINE0(time, linux_clock_getres, nullcall);
  102 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, conversion_error, "int");
  103 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, getres_error, "int");
  104 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, copyout_error, "int");
  105 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, return, "int");
  106 LIN_SDT_PROBE_DEFINE2(time, linux_nanosleep, entry, "const struct l_timespec *",
  107     "struct l_timespec *");
  108 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, conversion_error, "int");
  109 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyout_error, "int");
  110 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyin_error, "int");
  111 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, return, "int");
  112 LIN_SDT_PROBE_DEFINE4(time, linux_clock_nanosleep, entry, "clockid_t", "int",
  113     "struct l_timespec *", "struct l_timespec *");
  114 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, conversion_error, "int");
  115 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyout_error, "int");
  116 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyin_error, "int");
  117 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_flags, "int");
  118 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_clockid, "int");
  119 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, return, "int");
  120 
  121 
  122 void
  123 native_to_linux_timespec(struct l_timespec *ltp, struct timespec *ntp)
  124 {
  125 
  126         LIN_SDT_PROBE2(time, native_to_linux_timespec, entry, ltp, ntp);
  127 
  128         ltp->tv_sec = ntp->tv_sec;
  129         ltp->tv_nsec = ntp->tv_nsec;
  130 
  131         LIN_SDT_PROBE0(time, native_to_linux_timespec, return);
  132 }
  133 
  134 int
  135 linux_to_native_timespec(struct timespec *ntp, struct l_timespec *ltp)
  136 {
  137 
  138         LIN_SDT_PROBE2(time, linux_to_native_timespec, entry, ntp, ltp);
  139 
  140         if (ltp->tv_sec < 0 || ltp->tv_nsec > (l_long)999999999L) {
  141                 LIN_SDT_PROBE1(time, linux_to_native_timespec, return, EINVAL);
  142                 return (EINVAL);
  143         }
  144         ntp->tv_sec = ltp->tv_sec;
  145         ntp->tv_nsec = ltp->tv_nsec;
  146 
  147         LIN_SDT_PROBE1(time, linux_to_native_timespec, return, 0);
  148         return (0);
  149 }
  150 
  151 int
  152 linux_to_native_clockid(clockid_t *n, clockid_t l)
  153 {
  154 
  155         LIN_SDT_PROBE2(time, linux_to_native_clockid, entry, n, l);
  156 
  157         if (l < 0) {
  158                 /* cpu-clock */
  159                 if ((l & LINUX_CLOCKFD_MASK) == LINUX_CLOCKFD)
  160                         return (EINVAL);
  161                 if (LINUX_CPUCLOCK_WHICH(l) >= LINUX_CPUCLOCK_MAX)
  162                         return (EINVAL);
  163 
  164                 if (LINUX_CPUCLOCK_PERTHREAD(l))
  165                         *n = CLOCK_THREAD_CPUTIME_ID;
  166                 else
  167                         *n = CLOCK_PROCESS_CPUTIME_ID;
  168                 return (0);
  169         }
  170 
  171         switch (l) {
  172         case LINUX_CLOCK_REALTIME:
  173                 *n = CLOCK_REALTIME;
  174                 break;
  175         case LINUX_CLOCK_MONOTONIC:
  176                 *n = CLOCK_MONOTONIC;
  177                 break;
  178         case LINUX_CLOCK_REALTIME_COARSE:
  179                 *n = CLOCK_REALTIME_FAST;
  180                 break;
  181         case LINUX_CLOCK_MONOTONIC_COARSE:
  182                 *n = CLOCK_MONOTONIC_FAST;
  183                 break;
  184         case LINUX_CLOCK_MONOTONIC_RAW:
  185         case LINUX_CLOCK_BOOTTIME:
  186         case LINUX_CLOCK_REALTIME_ALARM:
  187         case LINUX_CLOCK_BOOTTIME_ALARM:
  188         case LINUX_CLOCK_SGI_CYCLE:
  189         case LINUX_CLOCK_TAI:
  190                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
  191                     unsupported_clockid, l);
  192                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
  193                 return (EINVAL);
  194         default:
  195                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
  196                     unknown_clockid, l);
  197                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
  198                 return (EINVAL);
  199         }
  200 
  201         LIN_SDT_PROBE1(time, linux_to_native_clockid, return, 0);
  202         return (0);
  203 }
  204 
  205 int
  206 linux_clock_gettime(struct thread *td, struct linux_clock_gettime_args *args)
  207 {
  208         struct l_timespec lts;
  209         struct timespec tp;
  210         struct rusage ru;
  211         struct thread *targettd;
  212         struct proc *p;
  213         int error, clockwhich;
  214         clockid_t nwhich = 0;   /* XXX: GCC */
  215         pid_t pid;
  216         lwpid_t tid;
  217 
  218         LIN_SDT_PROBE2(time, linux_clock_gettime, entry, args->which, args->tp);
  219 
  220         error = linux_to_native_clockid(&nwhich, args->which);
  221         if (error != 0) {
  222                 LIN_SDT_PROBE1(time, linux_clock_gettime, conversion_error,
  223                     error);
  224                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
  225                 return (error);
  226         }
  227 
  228         switch (nwhich) {
  229         case CLOCK_PROCESS_CPUTIME_ID:
  230                 clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
  231                 pid = LINUX_CPUCLOCK_ID(args->which);
  232                 if (pid == 0) {
  233                         p = td->td_proc;
  234                         PROC_LOCK(p);
  235                 } else {
  236                         error = pget(pid, PGET_CANSEE, &p);
  237                         if (error != 0)
  238                                 return (EINVAL);
  239                 }
  240                 switch (clockwhich) {
  241                 case LINUX_CPUCLOCK_PROF:
  242                         PROC_STATLOCK(p);
  243                         calcru(p, &ru.ru_utime, &ru.ru_stime);
  244                         PROC_STATUNLOCK(p);
  245                         PROC_UNLOCK(p);
  246                         timevaladd(&ru.ru_utime, &ru.ru_stime);
  247                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
  248                         break;
  249                 case LINUX_CPUCLOCK_VIRT:
  250                         PROC_STATLOCK(p);
  251                         calcru(p, &ru.ru_utime, &ru.ru_stime);
  252                         PROC_STATUNLOCK(p);
  253                         PROC_UNLOCK(p);
  254                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
  255                         break;
  256                 case LINUX_CPUCLOCK_SCHED:
  257                         PROC_UNLOCK(p);
  258                         error = kern_clock_getcpuclockid2(td, pid,
  259                             CPUCLOCK_WHICH_PID, &nwhich);
  260                         if (error != 0)
  261                                 return (EINVAL);
  262                         error = kern_clock_gettime(td, nwhich, &tp);
  263                         break;
  264                 default:
  265                         PROC_UNLOCK(p);
  266                         return (EINVAL);
  267                 }
  268 
  269                 break;
  270 
  271         case CLOCK_THREAD_CPUTIME_ID:
  272                 clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
  273                 p = td->td_proc;
  274                 tid = LINUX_CPUCLOCK_ID(args->which);
  275                 if (tid == 0) {
  276                         targettd = td;
  277                         PROC_LOCK(p);
  278                 } else {
  279                         targettd = tdfind(tid, p->p_pid);
  280                         if (targettd == NULL)
  281                                 return (EINVAL);
  282                 }
  283                 switch (clockwhich) {
  284                 case LINUX_CPUCLOCK_PROF:
  285                         PROC_STATLOCK(p);
  286                         thread_lock(targettd);
  287                         rufetchtd(targettd, &ru);
  288                         thread_unlock(targettd);
  289                         PROC_STATUNLOCK(p);
  290                         PROC_UNLOCK(p);
  291                         timevaladd(&ru.ru_utime, &ru.ru_stime);
  292                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
  293                         break;
  294                 case LINUX_CPUCLOCK_VIRT:
  295                         PROC_STATLOCK(p);
  296                         thread_lock(targettd);
  297                         rufetchtd(targettd, &ru);
  298                         thread_unlock(targettd);
  299                         PROC_STATUNLOCK(p);
  300                         PROC_UNLOCK(p);
  301                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
  302                         break;
  303                 case LINUX_CPUCLOCK_SCHED:
  304                         error = kern_clock_getcpuclockid2(td, tid,
  305                             CPUCLOCK_WHICH_TID, &nwhich);
  306                         PROC_UNLOCK(p);
  307                         if (error != 0)
  308                                 return (EINVAL);
  309                         error = kern_clock_gettime(td, nwhich, &tp);
  310                         break;
  311                 default:
  312                         PROC_UNLOCK(p);
  313                         return (EINVAL);
  314                 }
  315                 break;
  316 
  317         default:
  318                 error = kern_clock_gettime(td, nwhich, &tp);
  319                 break;
  320         }
  321         if (error != 0) {
  322                 LIN_SDT_PROBE1(time, linux_clock_gettime, gettime_error, error);
  323                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
  324                 return (error);
  325         }
  326         native_to_linux_timespec(&lts, &tp);
  327 
  328         error = copyout(&lts, args->tp, sizeof lts);
  329         if (error != 0)
  330                 LIN_SDT_PROBE1(time, linux_clock_gettime, copyout_error, error);
  331 
  332         LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
  333         return (error);
  334 }
  335 
  336 int
  337 linux_clock_settime(struct thread *td, struct linux_clock_settime_args *args)
  338 {
  339         struct timespec ts;
  340         struct l_timespec lts;
  341         int error;
  342         clockid_t nwhich = 0;   /* XXX: GCC */
  343 
  344         LIN_SDT_PROBE2(time, linux_clock_settime, entry, args->which, args->tp);
  345 
  346         error = linux_to_native_clockid(&nwhich, args->which);
  347         if (error != 0) {
  348                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
  349                     error);
  350                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  351                 return (error);
  352         }
  353         error = copyin(args->tp, &lts, sizeof lts);
  354         if (error != 0) {
  355                 LIN_SDT_PROBE1(time, linux_clock_settime, copyin_error, error);
  356                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  357                 return (error);
  358         }
  359         error = linux_to_native_timespec(&ts, &lts);
  360         if (error != 0) {
  361                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
  362                     error);
  363                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  364                 return (error);
  365         }
  366 
  367         error = kern_clock_settime(td, nwhich, &ts);
  368         if (error != 0)
  369                 LIN_SDT_PROBE1(time, linux_clock_settime, settime_error, error);
  370 
  371         LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  372         return (error);
  373 }
  374 
  375 int
  376 linux_clock_getres(struct thread *td, struct linux_clock_getres_args *args)
  377 {
  378         struct proc *p;
  379         struct timespec ts;
  380         struct l_timespec lts;
  381         int error, clockwhich;
  382         clockid_t nwhich = 0;   /* XXX: GCC */
  383         pid_t pid;
  384         lwpid_t tid;
  385 
  386         LIN_SDT_PROBE2(time, linux_clock_getres, entry, args->which, args->tp);
  387 
  388         error = linux_to_native_clockid(&nwhich, args->which);
  389         if (error != 0) {
  390                 LIN_SDT_PROBE1(time, linux_clock_getres, conversion_error,
  391                     error);
  392                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
  393                 return (error);
  394         }
  395 
  396         /*
  397          * Check user supplied clock id in case of per-process 
  398          * or thread-specific cpu-time clock.
  399          */
  400         switch (nwhich) {
  401         case CLOCK_THREAD_CPUTIME_ID:
  402                 tid = LINUX_CPUCLOCK_ID(args->which);
  403                 if (tid != 0) {
  404                         p = td->td_proc;
  405                         if (tdfind(tid, p->p_pid) == NULL)
  406                                 return (ESRCH);
  407                         PROC_UNLOCK(p);
  408                 }
  409                 break;
  410         case CLOCK_PROCESS_CPUTIME_ID:
  411                 pid = LINUX_CPUCLOCK_ID(args->which);
  412                 if (pid != 0) {
  413                         error = pget(pid, PGET_CANSEE, &p);
  414                         if (error != 0)
  415                                 return (EINVAL);
  416                         PROC_UNLOCK(p);
  417                 }
  418                 break;
  419         }
  420 
  421         if (args->tp == NULL) {
  422                 LIN_SDT_PROBE0(time, linux_clock_getres, nullcall);
  423                 LIN_SDT_PROBE1(time, linux_clock_getres, return, 0);
  424                 return (0);
  425         }
  426 
  427         switch (nwhich) {
  428         case CLOCK_THREAD_CPUTIME_ID:
  429         case CLOCK_PROCESS_CPUTIME_ID:
  430                 clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
  431                 switch (clockwhich) {
  432                 case LINUX_CPUCLOCK_PROF:
  433                         nwhich = CLOCK_PROF;
  434                         break;
  435                 case LINUX_CPUCLOCK_VIRT:
  436                         nwhich = CLOCK_VIRTUAL;
  437                         break;
  438                 case LINUX_CPUCLOCK_SCHED:
  439                         break;
  440                 default:
  441                         return (EINVAL);
  442                 }
  443                 break;
  444 
  445         default:
  446                 break;
  447         }
  448         error = kern_clock_getres(td, nwhich, &ts);
  449         if (error != 0) {
  450                 LIN_SDT_PROBE1(time, linux_clock_getres, getres_error, error);
  451                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
  452                 return (error);
  453         }
  454         native_to_linux_timespec(&lts, &ts);
  455 
  456         error = copyout(&lts, args->tp, sizeof lts);
  457         if (error != 0)
  458                 LIN_SDT_PROBE1(time, linux_clock_getres, copyout_error, error);
  459 
  460         LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
  461         return (error);
  462 }
  463 
  464 int
  465 linux_nanosleep(struct thread *td, struct linux_nanosleep_args *args)
  466 {
  467         struct timespec *rmtp;
  468         struct l_timespec lrqts, lrmts;
  469         struct timespec rqts, rmts;
  470         int error, error2;
  471 
  472         LIN_SDT_PROBE2(time, linux_nanosleep, entry, args->rqtp, args->rmtp);
  473 
  474         error = copyin(args->rqtp, &lrqts, sizeof lrqts);
  475         if (error != 0) {
  476                 LIN_SDT_PROBE1(time, linux_nanosleep, copyin_error, error);
  477                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  478                 return (error);
  479         }
  480 
  481         if (args->rmtp != NULL)
  482                 rmtp = &rmts;
  483         else
  484                 rmtp = NULL;
  485 
  486         error = linux_to_native_timespec(&rqts, &lrqts);
  487         if (error != 0) {
  488                 LIN_SDT_PROBE1(time, linux_nanosleep, conversion_error, error);
  489                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  490                 return (error);
  491         }
  492         error = kern_nanosleep(td, &rqts, rmtp);
  493         if (error == EINTR && args->rmtp != NULL) {
  494                 native_to_linux_timespec(&lrmts, rmtp);
  495                 error2 = copyout(&lrmts, args->rmtp, sizeof(lrmts));
  496                 if (error2 != 0) {
  497                         LIN_SDT_PROBE1(time, linux_nanosleep, copyout_error,
  498                             error2);
  499                         LIN_SDT_PROBE1(time, linux_nanosleep, return, error2);
  500                         return (error2);
  501                 }
  502         }
  503 
  504         LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  505         return (error);
  506 }
  507 
  508 int
  509 linux_clock_nanosleep(struct thread *td, struct linux_clock_nanosleep_args *args)
  510 {
  511         struct timespec *rmtp;
  512         struct l_timespec lrqts, lrmts;
  513         struct timespec rqts, rmts;
  514         int error, error2;
  515 
  516         LIN_SDT_PROBE4(time, linux_clock_nanosleep, entry, args->which,
  517             args->flags, args->rqtp, args->rmtp);
  518 
  519         if (args->flags != 0) {
  520                 /* XXX deal with TIMER_ABSTIME */
  521                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_flags,
  522                     args->flags);
  523                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
  524                 return (EINVAL);        /* XXX deal with TIMER_ABSTIME */
  525         }
  526 
  527         if (args->which != LINUX_CLOCK_REALTIME) {
  528                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_clockid,
  529                     args->which);
  530                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
  531                 return (EINVAL);
  532         }
  533 
  534         error = copyin(args->rqtp, &lrqts, sizeof(lrqts));
  535         if (error != 0) {
  536                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, copyin_error,
  537                     error);
  538                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
  539                 return (error);
  540         }
  541 
  542         if (args->rmtp != NULL)
  543                 rmtp = &rmts;
  544         else
  545                 rmtp = NULL;
  546 
  547         error = linux_to_native_timespec(&rqts, &lrqts);
  548         if (error != 0) {
  549                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, conversion_error,
  550                     error);
  551                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
  552                 return (error);
  553         }
  554         error = kern_nanosleep(td, &rqts, rmtp);
  555         if (error == EINTR && args->rmtp != NULL) {
  556                 /* XXX. Not for TIMER_ABSTIME */
  557                 native_to_linux_timespec(&lrmts, rmtp);
  558                 error2 = copyout(&lrmts, args->rmtp, sizeof(lrmts));
  559                 if (error2 != 0) {
  560                         LIN_SDT_PROBE1(time, linux_clock_nanosleep,
  561                             copyout_error, error2);
  562                         LIN_SDT_PROBE1(time, linux_clock_nanosleep,
  563                             return, error2);
  564                         return (error2);
  565                 }
  566         }
  567 
  568         LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
  569         return (error);
  570 }

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