sys/compat/linux/linux_time.c

   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("$FreeBSD$");
  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
  40 #include <sys/param.h>
  41 #include <sys/kernel.h>
  42 #include <sys/lock.h>
  43 #include <sys/ucred.h>
  44 #include <sys/mount.h>
  45 #include <sys/mutex.h>
  46 #include <sys/resourcevar.h>
  47 #include <sys/sdt.h>
  48 #include <sys/signal.h>
  49 #include <sys/stdint.h>
  50 #include <sys/syscallsubr.h>
  51 #include <sys/sysproto.h>
  52 #include <sys/time.h>
  53 #include <sys/systm.h>
  54 #include <sys/proc.h>
  55
  56 #ifdef COMPAT_LINUX32
  57 #include <machine/../linux32/linux.h>
  58 #include <machine/../linux32/linux32_proto.h>
  59 #else
  60 #include <machine/../linux/linux.h>
  61 #include <machine/../linux/linux_proto.h>
  62 #endif
  63
  64 #include <compat/linux/linux_dtrace.h>
  65 #include <compat/linux/linux_timer.h>
  66
  67 /* DTrace init */
  68 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
  69
  70 /**
  71  * DTrace probes in this module.
  72  */
  73 LIN_SDT_PROBE_DEFINE2(time, native_to_linux_timespec, entry,
  74     "struct l_timespec *", "struct timespec *");
  75 LIN_SDT_PROBE_DEFINE0(time, native_to_linux_timespec, return);
  76 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_timespec, entry,
  77     "struct timespec *", "struct l_timespec *");
  78 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_timespec, return, "int");
  79 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_clockid, entry, "clockid_t *",
  80     "clockid_t");
  81 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unsupported_clockid,
  82     "clockid_t");
  83 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unknown_clockid,
  84     "clockid_t");
  85 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, return, "int");
  86 LIN_SDT_PROBE_DEFINE2(time, linux_clock_gettime, entry, "clockid_t",
  87     "struct l_timespec *");
  88 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, conversion_error, "int");
  89 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, gettime_error, "int");
  90 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, copyout_error, "int");
  91 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, return, "int");
  92 LIN_SDT_PROBE_DEFINE2(time, linux_clock_settime, entry, "clockid_t",
  93     "struct l_timespec *");
  94 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, conversion_error, "int");
  95 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, settime_error, "int");
  96 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, copyin_error, "int");
  97 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, return, "int");
  98 LIN_SDT_PROBE_DEFINE2(time, linux_clock_getres, entry, "clockid_t",
  99     "struct l_timespec *");
 100 LIN_SDT_PROBE_DEFINE0(time, linux_clock_getres, nullcall);
 101 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, conversion_error, "int");
 102 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, getres_error, "int");
 103 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, copyout_error, "int");
 104 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, return, "int");
 105 LIN_SDT_PROBE_DEFINE2(time, linux_nanosleep, entry, "const struct l_timespec *",
 106     "struct l_timespec *");
 107 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, conversion_error, "int");
 108 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, nanosleep_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, nanosleep_error, "int");
 116 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyout_error, "int");
 117 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyin_error, "int");
 118 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_flags, "int");
 119 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_clockid, "int");
 120 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, return, "int");
 121
 122 static void native_to_linux_timespec(struct l_timespec *,
 123                                      struct timespec *);
 124 static int linux_to_native_timespec(struct timespec *,
 125                                      struct l_timespec *);
 126 static int linux_to_native_clockid(clockid_t *, clockid_t);
 127
 128 static void
 129 native_to_linux_timespec(struct l_timespec *ltp, struct timespec *ntp)
 130 {
 131
 132         LIN_SDT_PROBE2(time, native_to_linux_timespec, entry, ltp, ntp);
 133
 134         ltp->tv_sec = ntp->tv_sec;
 135         ltp->tv_nsec = ntp->tv_nsec;
 136
 137         LIN_SDT_PROBE0(time, native_to_linux_timespec, return);
 138 }
 139
 140 static int
 141 linux_to_native_timespec(struct timespec *ntp, struct l_timespec *ltp)
 142 {
 143
 144         LIN_SDT_PROBE2(time, linux_to_native_timespec, entry, ntp, ltp);
 145
 146         if (ltp->tv_sec < 0 || ltp->tv_nsec > (l_long)999999999L) {
 147                 LIN_SDT_PROBE1(time, linux_to_native_timespec, return, EINVAL);
 148                 return (EINVAL);
 149         }
 150         ntp->tv_sec = ltp->tv_sec;
 151         ntp->tv_nsec = ltp->tv_nsec;
 152
 153         LIN_SDT_PROBE1(time, linux_to_native_timespec, return, 0);
 154         return (0);
 155 }
 156
 157 static int
 158 linux_to_native_clockid(clockid_t *n, clockid_t l)
 159 {
 160
 161         LIN_SDT_PROBE2(time, linux_to_native_clockid, entry, n, l);
 162
 163         if (l < 0) {
 164                 /* cpu-clock */
 165                 if ((l & LINUX_CLOCKFD_MASK) == LINUX_CLOCKFD)
 166                         return (EINVAL);
 167                 if (LINUX_CPUCLOCK_WHICH(l) >= LINUX_CPUCLOCK_MAX)
 168                         return (EINVAL);
 169
 170                 if (LINUX_CPUCLOCK_PERTHREAD(l))
 171                         *n = CLOCK_THREAD_CPUTIME_ID;
 172                 else
 173                         *n = CLOCK_PROCESS_CPUTIME_ID;
 174                 return (0);
 175         }
 176
 177         switch (l) {
 178         case LINUX_CLOCK_REALTIME:
 179                 *n = CLOCK_REALTIME;
 180                 break;
 181         case LINUX_CLOCK_MONOTONIC:
 182                 *n = CLOCK_MONOTONIC;
 183                 break;
 184         case LINUX_CLOCK_REALTIME_COARSE:
 185                 *n = CLOCK_REALTIME_FAST;
 186                 break;
 187         case LINUX_CLOCK_MONOTONIC_COARSE:
 188                 *n = CLOCK_MONOTONIC_FAST;
 189                 break;
 190         case LINUX_CLOCK_MONOTONIC_RAW:
 191         case LINUX_CLOCK_BOOTTIME:
 192         case LINUX_CLOCK_REALTIME_ALARM:
 193         case LINUX_CLOCK_BOOTTIME_ALARM:
 194         case LINUX_CLOCK_SGI_CYCLE:
 195         case LINUX_CLOCK_TAI:
 196                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
 197                     unsupported_clockid, l);
 198                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
 199                 return (EINVAL);
 200         default:
 201                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
 202                     unknown_clockid, l);
 203                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
 204                 return (EINVAL);
 205         }
 206
 207         LIN_SDT_PROBE1(time, linux_to_native_clockid, return, 0);
 208         return (0);
 209 }
 210
 211 int
 212 linux_clock_gettime(struct thread *td, struct linux_clock_gettime_args *args)
 213 {
 214         struct l_timespec lts;
 215         struct timespec tp;
 216         struct rusage ru;
 217         struct thread *targettd;
 218         struct proc *p;
 219         int error, clockwhich;
 220         clockid_t nwhich = 0;   /* XXX: GCC */
 221         pid_t pid;
 222         lwpid_t tid;
 223
 224         LIN_SDT_PROBE2(time, linux_clock_gettime, entry, args->which, args->tp);
 225
 226         error = linux_to_native_clockid(&nwhich, args->which);
 227         if (error != 0) {
 228                 LIN_SDT_PROBE1(time, linux_clock_gettime, conversion_error,
 229                     error);
 230                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
 231                 return (error);
 232         }
 233
 234         switch (nwhich) {
 235         case CLOCK_PROCESS_CPUTIME_ID:
 236                 clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
 237                 pid = LINUX_CPUCLOCK_ID(args->which);
 238                 if (pid == 0) {
 239                         p = td->td_proc;
 240                         PROC_LOCK(p);
 241                 } else {
 242                         error = pget(pid, PGET_CANSEE, &p);
 243                         if (error != 0)
 244                                 return (EINVAL);
 245                 }
 246                 switch (clockwhich) {
 247                 case LINUX_CPUCLOCK_PROF:
 248                         PROC_STATLOCK(p);
 249                         calcru(p, &ru.ru_utime, &ru.ru_stime);
 250                         PROC_STATUNLOCK(p);
 251                         PROC_UNLOCK(p);
 252                         timevaladd(&ru.ru_utime, &ru.ru_stime);
 253                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 254                         break;
 255                 case LINUX_CPUCLOCK_VIRT:
 256                         PROC_STATLOCK(p);
 257                         calcru(p, &ru.ru_utime, &ru.ru_stime);
 258                         PROC_STATUNLOCK(p);
 259                         PROC_UNLOCK(p);
 260                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 261                         break;
 262                 case LINUX_CPUCLOCK_SCHED:
 263                         PROC_UNLOCK(p);
 264                         error = kern_clock_getcpuclockid2(td, pid,
 265                             CPUCLOCK_WHICH_PID, &nwhich);
 266                         if (error != 0)
 267                                 return (EINVAL);
 268                         error = kern_clock_gettime(td, nwhich, &tp);
 269                         break;
 270                 default:
 271                         PROC_UNLOCK(p);
 272                         return (EINVAL);
 273                 }
 274
 275                 break;
 276
 277         case CLOCK_THREAD_CPUTIME_ID:
 278                 clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
 279                 p = td->td_proc;
 280                 tid = LINUX_CPUCLOCK_ID(args->which);
 281                 if (tid == 0) {
 282                         targettd = td;
 283                         PROC_LOCK(p);
 284                 } else {
 285                         targettd = tdfind(tid, p->p_pid);
 286                         if (targettd == NULL)
 287                                 return (EINVAL);
 288                 }
 289                 switch (clockwhich) {
 290                 case LINUX_CPUCLOCK_PROF:
 291                         PROC_STATLOCK(p);
 292                         thread_lock(targettd);
 293                         rufetchtd(targettd, &ru);
 294                         thread_unlock(targettd);
 295                         PROC_STATUNLOCK(p);
 296                         PROC_UNLOCK(p);
 297                         timevaladd(&ru.ru_utime, &ru.ru_stime);
 298                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 299                         break;
 300                 case LINUX_CPUCLOCK_VIRT:
 301                         PROC_STATLOCK(p);
 302                         thread_lock(targettd);
 303                         rufetchtd(targettd, &ru);
 304                         thread_unlock(targettd);
 305                         PROC_STATUNLOCK(p);
 306                         PROC_UNLOCK(p);
 307                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 308                         break;
 309                 case LINUX_CPUCLOCK_SCHED:
 310                         error = kern_clock_getcpuclockid2(td, tid,
 311                             CPUCLOCK_WHICH_TID, &nwhich);
 312                         PROC_UNLOCK(p);
 313                         if (error != 0)
 314                                 return (EINVAL);
 315                         error = kern_clock_gettime(td, nwhich, &tp);
 316                         break;
 317                 default:
 318                         PROC_UNLOCK(p);
 319                         return (EINVAL);
 320                 }
 321                 break;
 322
 323         default:
 324                 error = kern_clock_gettime(td, nwhich, &tp);
 325                 break;
 326         }
 327         if (error != 0) {
 328                 LIN_SDT_PROBE1(time, linux_clock_gettime, gettime_error, error);
 329                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
 330                 return (error);
 331         }
 332         native_to_linux_timespec(&lts, &tp);
 333
 334         error = copyout(&lts, args->tp, sizeof lts);
 335         if (error != 0)
 336                 LIN_SDT_PROBE1(time, linux_clock_gettime, copyout_error, error);
 337
 338         LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
 339         return (error);
 340 }
 341
 342 int
 343 linux_clock_settime(struct thread *td, struct linux_clock_settime_args *args)
 344 {
 345         struct timespec ts;
 346         struct l_timespec lts;
 347         int error;
 348         clockid_t nwhich = 0;   /* XXX: GCC */
 349
 350         LIN_SDT_PROBE2(time, linux_clock_settime, entry, args->which, args->tp);
 351
 352         error = linux_to_native_clockid(&nwhich, args->which);
 353         if (error != 0) {
 354                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
 355                     error);
 356                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 357                 return (error);
 358         }
 359         error = copyin(args->tp, &lts, sizeof lts);
 360         if (error != 0) {
 361                 LIN_SDT_PROBE1(time, linux_clock_settime, copyin_error, error);
 362                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 363                 return (error);
 364         }
 365         error = linux_to_native_timespec(&ts, &lts);
 366         if (error != 0) {
 367                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
 368                     error);
 369                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 370                 return (error);
 371         }
 372
 373         error = kern_clock_settime(td, nwhich, &ts);
 374         if (error != 0)
 375                 LIN_SDT_PROBE1(time, linux_clock_settime, settime_error, error);
 376
 377         LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 378         return (error);
 379 }
 380
 381 int
 382 linux_clock_getres(struct thread *td, struct linux_clock_getres_args *args)
 383 {
 384         struct proc *p;
 385         struct timespec ts;
 386         struct l_timespec lts;
 387         int error, clockwhich;
 388         clockid_t nwhich = 0;   /* XXX: GCC */
 389         pid_t pid;
 390         lwpid_t tid;
 391
 392         LIN_SDT_PROBE2(time, linux_clock_getres, entry, args->which, args->tp);
 393
 394         error = linux_to_native_clockid(&nwhich, args->which);
 395         if (error != 0) {
 396                 LIN_SDT_PROBE1(time, linux_clock_getres, conversion_error,
 397                     error);
 398                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
 399                 return (error);
 400         }
 401
 402         /*
 403          * Check user supplied clock id in case of per-process
 404          * or thread-specific cpu-time clock.
 405          */
 406         switch (nwhich) {
 407         case CLOCK_THREAD_CPUTIME_ID:
 408                 tid = LINUX_CPUCLOCK_ID(args->which);
 409                 if (tid != 0) {
 410                         p = td->td_proc;
 411                         if (tdfind(tid, p->p_pid) == NULL)
 412                                 return (ESRCH);
 413                         PROC_UNLOCK(p);
 414                 }
 415                 break;
 416         case CLOCK_PROCESS_CPUTIME_ID:
 417                 pid = LINUX_CPUCLOCK_ID(args->which);
 418                 if (pid != 0) {
 419                         error = pget(pid, PGET_CANSEE, &p);
 420                         if (error != 0)
 421                                 return (EINVAL);
 422                         PROC_UNLOCK(p);
 423                 }
 424                 break;
 425         }
 426
 427         if (args->tp == NULL) {
 428                 LIN_SDT_PROBE0(time, linux_clock_getres, nullcall);
 429                 LIN_SDT_PROBE1(time, linux_clock_getres, return, 0);
 430                 return (0);
 431         }
 432
 433         switch (nwhich) {
 434         case CLOCK_THREAD_CPUTIME_ID:
 435         case CLOCK_PROCESS_CPUTIME_ID:
 436                 clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
 437                 switch (clockwhich) {
 438                 case LINUX_CPUCLOCK_PROF:
 439                         nwhich = CLOCK_PROF;
 440                         break;
 441                 case LINUX_CPUCLOCK_VIRT:
 442                         nwhich = CLOCK_VIRTUAL;
 443                         break;
 444                 case LINUX_CPUCLOCK_SCHED:
 445                         break;
 446                 default:
 447                         return (EINVAL);
 448                 }
 449                 break;
 450
 451         default:
 452                 break;
 453         }
 454         error = kern_clock_getres(td, nwhich, &ts);
 455         if (error != 0) {
 456                 LIN_SDT_PROBE1(time, linux_clock_getres, getres_error, error);
 457                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
 458                 return (error);
 459         }
 460         native_to_linux_timespec(&lts, &ts);
 461
 462         error = copyout(&lts, args->tp, sizeof lts);
 463         if (error != 0)
 464                 LIN_SDT_PROBE1(time, linux_clock_getres, copyout_error, error);
 465
 466         LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
 467         return (error);
 468 }
 469
 470 int
 471 linux_nanosleep(struct thread *td, struct linux_nanosleep_args *args)
 472 {
 473         struct timespec *rmtp;
 474         struct l_timespec lrqts, lrmts;
 475         struct timespec rqts, rmts;
 476         int error;
 477
 478         LIN_SDT_PROBE2(time, linux_nanosleep, entry, args->rqtp, args->rmtp);
 479
 480         error = copyin(args->rqtp, &lrqts, sizeof lrqts);
 481         if (error != 0) {
 482                 LIN_SDT_PROBE1(time, linux_nanosleep, copyin_error, error);
 483                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 484                 return (error);
 485         }
 486
 487         if (args->rmtp != NULL)
 488                 rmtp = &rmts;
 489         else
 490                 rmtp = NULL;
 491
 492         error = linux_to_native_timespec(&rqts, &lrqts);
 493         if (error != 0) {
 494                 LIN_SDT_PROBE1(time, linux_nanosleep, conversion_error, error);
 495                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 496                 return (error);
 497         }
 498         error = kern_nanosleep(td, &rqts, rmtp);
 499         if (error != 0) {
 500                 LIN_SDT_PROBE1(time, linux_nanosleep, nanosleep_error, error);
 501                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 502                 return (error);
 503         }
 504
 505         if (args->rmtp != NULL) {
 506                 native_to_linux_timespec(&lrmts, rmtp);
 507                 error = copyout(&lrmts, args->rmtp, sizeof(lrmts));
 508                 if (error != 0) {
 509                         LIN_SDT_PROBE1(time, linux_nanosleep, copyout_error,
 510                             error);
 511                         LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 512                         return (error);
 513                 }
 514         }
 515
 516         LIN_SDT_PROBE1(time, linux_nanosleep, return, 0);
 517         return (0);
 518 }
 519
 520 int
 521 linux_clock_nanosleep(struct thread *td, struct linux_clock_nanosleep_args *args)
 522 {
 523         struct timespec *rmtp;
 524         struct l_timespec lrqts, lrmts;
 525         struct timespec rqts, rmts;
 526         int error;
 527
 528         LIN_SDT_PROBE4(time, linux_clock_nanosleep, entry, args->which,
 529             args->flags, args->rqtp, args->rmtp);
 530
 531         if (args->flags != 0) {
 532                 /* XXX deal with TIMER_ABSTIME */
 533                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_flags,
 534                     args->flags);
 535                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
 536                 return (EINVAL);        /* XXX deal with TIMER_ABSTIME */
 537         }
 538
 539         if (args->which != LINUX_CLOCK_REALTIME) {
 540                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_clockid,
 541                     args->which);
 542                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
 543                 return (EINVAL);
 544         }
 545
 546         error = copyin(args->rqtp, &lrqts, sizeof lrqts);
 547         if (error != 0) {
 548                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, copyin_error,
 549                     error);
 550                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
 551                 return (error);
 552         }
 553
 554         if (args->rmtp != NULL)
 555                 rmtp = &rmts;
 556         else
 557                 rmtp = NULL;
 558
 559         error = linux_to_native_timespec(&rqts, &lrqts);
 560         if (error != 0) {
 561                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, conversion_error,
 562                     error);
 563                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
 564                 return (error);
 565         }
 566         error = kern_nanosleep(td, &rqts, rmtp);
 567         if (error != 0) {
 568                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, nanosleep_error,
 569                     error);
 570                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
 571                 return (error);
 572         }
 573
 574         if (args->rmtp != NULL) {
 575                 native_to_linux_timespec(&lrmts, rmtp);
 576                 error = copyout(&lrmts, args->rmtp, sizeof lrmts );
 577                 if (error != 0) {
 578                         LIN_SDT_PROBE1(time, linux_clock_nanosleep,
 579                             copyout_error, error);
 580                         LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 581                         return (error);
 582                 }
 583         }
 584
 585         LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, 0);
 586         return (0);
 587 }