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  * SPDX-License-Identifier: BSD-2-Clause-NetBSD
   5  *
   6  * Copyright (c) 2001 The NetBSD Foundation, Inc.
   7  * All rights reserved.
   8  *
   9  * This code is derived from software contributed to The NetBSD Foundation
  10  * by Emmanuel Dreyfus.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36 #if 0
  37 __KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $");
  38 #endif
  39
  40 #include "opt_compat.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/kernel.h>
  44 #include <sys/lock.h>
  45 #include <sys/ucred.h>
  46 #include <sys/limits.h>
  47 #include <sys/mount.h>
  48 #include <sys/mutex.h>
  49 #include <sys/resourcevar.h>
  50 #include <sys/sdt.h>
  51 #include <sys/signal.h>
  52 #include <sys/stdint.h>
  53 #include <sys/syscallsubr.h>
  54 #include <sys/sysproto.h>
  55 #include <sys/time.h>
  56 #include <sys/systm.h>
  57 #include <sys/proc.h>
  58
  59 #ifdef COMPAT_LINUX32
  60 #include <machine/../linux32/linux.h>
  61 #include <machine/../linux32/linux32_proto.h>
  62 #else
  63 #include <machine/../linux/linux.h>
  64 #include <machine/../linux/linux_proto.h>
  65 #endif
  66
  67 #include <compat/linux/linux_dtrace.h>
  68 #include <compat/linux/linux_misc.h>
  69 #include <compat/linux/linux_timer.h>
  70 #include <compat/linux/linux_util.h>
  71
  72 /* DTrace init */
  73 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
  74
  75 /**
  76  * DTrace probes in this module.
  77  */
  78 LIN_SDT_PROBE_DEFINE2(time, native_to_linux_timespec, entry,
  79     "struct l_timespec *", "struct timespec *");
  80 LIN_SDT_PROBE_DEFINE0(time, native_to_linux_timespec, return);
  81 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_timespec, entry,
  82     "struct timespec *", "struct l_timespec *");
  83 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_timespec, return, "int");
  84 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_clockid, entry, "clockid_t *",
  85     "clockid_t");
  86 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unsupported_clockid,
  87     "clockid_t");
  88 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unknown_clockid,
  89     "clockid_t");
  90 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, return, "int");
  91 LIN_SDT_PROBE_DEFINE2(time, linux_clock_gettime, entry, "clockid_t",
  92     "struct l_timespec *");
  93 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, conversion_error, "int");
  94 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, gettime_error, "int");
  95 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, copyout_error, "int");
  96 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, return, "int");
  97 LIN_SDT_PROBE_DEFINE2(time, linux_clock_settime, entry, "clockid_t",
  98     "struct l_timespec *");
  99 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, conversion_error, "int");
 100 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, settime_error, "int");
 101 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, copyin_error, "int");
 102 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, return, "int");
 103 LIN_SDT_PROBE_DEFINE2(time, linux_clock_getres, entry, "clockid_t",
 104     "struct l_timespec *");
 105 LIN_SDT_PROBE_DEFINE0(time, linux_clock_getres, nullcall);
 106 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, conversion_error, "int");
 107 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, getres_error, "int");
 108 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, copyout_error, "int");
 109 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, return, "int");
 110 LIN_SDT_PROBE_DEFINE2(time, linux_nanosleep, entry, "const struct l_timespec *",
 111     "struct l_timespec *");
 112 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, conversion_error, "int");
 113 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyout_error, "int");
 114 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyin_error, "int");
 115 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, return, "int");
 116 LIN_SDT_PROBE_DEFINE4(time, linux_clock_nanosleep, entry, "clockid_t", "int",
 117     "struct l_timespec *", "struct l_timespec *");
 118 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, conversion_error, "int");
 119 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyout_error, "int");
 120 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyin_error, "int");
 121 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_flags, "int");
 122 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_clockid, "int");
 123 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, return, "int");
 124
 125 int
 126 native_to_linux_timespec(struct l_timespec *ltp, struct timespec *ntp)
 127 {
 128
 129         LIN_SDT_PROBE2(time, native_to_linux_timespec, entry, ltp, ntp);
 130 #ifdef COMPAT_LINUX32
 131         if (ntp->tv_sec > INT_MAX || ntp->tv_sec < INT_MIN)
 132                 return (EOVERFLOW);
 133 #endif
 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         return (0);
 139 }
 140
 141 int
 142 linux_to_native_timespec(struct timespec *ntp, struct l_timespec *ltp)
 143 {
 144
 145         LIN_SDT_PROBE2(time, linux_to_native_timespec, entry, ntp, ltp);
 146
 147         if (ltp->tv_sec < 0 || ltp->tv_nsec < 0 || ltp->tv_nsec > 999999999) {
 148                 LIN_SDT_PROBE1(time, linux_to_native_timespec, return, EINVAL);
 149                 return (EINVAL);
 150         }
 151         ntp->tv_sec = ltp->tv_sec;
 152         ntp->tv_nsec = ltp->tv_nsec;
 153
 154         LIN_SDT_PROBE1(time, linux_to_native_timespec, return, 0);
 155         return (0);
 156 }
 157
 158 int
 159 native_to_linux_itimerspec(struct l_itimerspec *ltp, struct itimerspec *ntp)
 160 {
 161         int error;
 162
 163         error = native_to_linux_timespec(&ltp->it_interval, &ntp->it_interval);
 164         if (error == 0)
 165                 error = native_to_linux_timespec(&ltp->it_value, &ntp->it_interval);
 166         return (error);
 167 }
 168
 169 int
 170 linux_to_native_itimerspec(struct itimerspec *ntp, struct l_itimerspec *ltp)
 171 {
 172         int error;
 173
 174         error = linux_to_native_timespec(&ntp->it_interval, &ltp->it_interval);
 175         if (error == 0)
 176                 error = linux_to_native_timespec(&ntp->it_value, &ltp->it_value);
 177         return (error);
 178 }
 179
 180 int
 181 linux_to_native_clockid(clockid_t *n, clockid_t l)
 182 {
 183
 184         LIN_SDT_PROBE2(time, linux_to_native_clockid, entry, n, l);
 185
 186         if (l < 0) {
 187                 /* cpu-clock */
 188                 if ((l & LINUX_CLOCKFD_MASK) == LINUX_CLOCKFD)
 189                         return (EINVAL);
 190                 if (LINUX_CPUCLOCK_WHICH(l) >= LINUX_CPUCLOCK_MAX)
 191                         return (EINVAL);
 192
 193                 if (LINUX_CPUCLOCK_PERTHREAD(l))
 194                         *n = CLOCK_THREAD_CPUTIME_ID;
 195                 else
 196                         *n = CLOCK_PROCESS_CPUTIME_ID;
 197                 return (0);
 198         }
 199
 200         switch (l) {
 201         case LINUX_CLOCK_REALTIME:
 202                 *n = CLOCK_REALTIME;
 203                 break;
 204         case LINUX_CLOCK_MONOTONIC:
 205                 *n = CLOCK_MONOTONIC;
 206                 break;
 207         case LINUX_CLOCK_PROCESS_CPUTIME_ID:
 208                 *n = CLOCK_PROCESS_CPUTIME_ID;
 209                 break;
 210         case LINUX_CLOCK_THREAD_CPUTIME_ID:
 211                 *n = CLOCK_THREAD_CPUTIME_ID;
 212                 break;
 213         case LINUX_CLOCK_REALTIME_COARSE:
 214                 *n = CLOCK_REALTIME_FAST;
 215                 break;
 216         case LINUX_CLOCK_MONOTONIC_COARSE:
 217         case LINUX_CLOCK_MONOTONIC_RAW:
 218                 *n = CLOCK_MONOTONIC_FAST;
 219                 break;
 220         case LINUX_CLOCK_BOOTTIME:
 221                 *n = CLOCK_UPTIME;
 222                 break;
 223         case LINUX_CLOCK_REALTIME_ALARM:
 224         case LINUX_CLOCK_BOOTTIME_ALARM:
 225         case LINUX_CLOCK_SGI_CYCLE:
 226         case LINUX_CLOCK_TAI:
 227                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
 228                     unsupported_clockid, l);
 229                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
 230                 return (EINVAL);
 231         default:
 232                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
 233                     unknown_clockid, l);
 234                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
 235                 return (EINVAL);
 236         }
 237
 238         LIN_SDT_PROBE1(time, linux_to_native_clockid, return, 0);
 239         return (0);
 240 }
 241
 242 int
 243 linux_to_native_timerflags(int *nflags, int flags)
 244 {
 245
 246         if (flags & ~LINUX_TIMER_ABSTIME)
 247                 return (EINVAL);
 248         *nflags = 0;
 249         if (flags & LINUX_TIMER_ABSTIME)
 250                 *nflags |= TIMER_ABSTIME;
 251         return (0);
 252 }
 253
 254 int
 255 linux_clock_gettime(struct thread *td, struct linux_clock_gettime_args *args)
 256 {
 257         struct l_timespec lts;
 258         struct timespec tp;
 259         struct rusage ru;
 260         struct thread *targettd;
 261         struct proc *p;
 262         int error, clockwhich;
 263         clockid_t nwhich;
 264         pid_t pid;
 265         lwpid_t tid;
 266
 267         LIN_SDT_PROBE2(time, linux_clock_gettime, entry, args->which, args->tp);
 268
 269         error = linux_to_native_clockid(&nwhich, args->which);
 270         if (error != 0) {
 271                 linux_msg(curthread,
 272                     "unsupported clock_gettime clockid %d", args->which);
 273                 LIN_SDT_PROBE1(time, linux_clock_gettime, conversion_error,
 274                     error);
 275                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
 276                 return (error);
 277         }
 278
 279         switch (nwhich) {
 280         case CLOCK_PROCESS_CPUTIME_ID:
 281                 if (args->which < 0) {
 282                         clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
 283                         pid = LINUX_CPUCLOCK_ID(args->which);
 284                 } else {
 285                         clockwhich = LINUX_CPUCLOCK_SCHED;
 286                         pid = 0;
 287                 }
 288                 if (pid == 0) {
 289                         p = td->td_proc;
 290                         PROC_LOCK(p);
 291                 } else {
 292                         error = pget(pid, PGET_CANSEE, &p);
 293                         if (error != 0)
 294                                 return (EINVAL);
 295                 }
 296                 switch (clockwhich) {
 297                 case LINUX_CPUCLOCK_PROF:
 298                         PROC_STATLOCK(p);
 299                         calcru(p, &ru.ru_utime, &ru.ru_stime);
 300                         PROC_STATUNLOCK(p);
 301                         PROC_UNLOCK(p);
 302                         timevaladd(&ru.ru_utime, &ru.ru_stime);
 303                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 304                         break;
 305                 case LINUX_CPUCLOCK_VIRT:
 306                         PROC_STATLOCK(p);
 307                         calcru(p, &ru.ru_utime, &ru.ru_stime);
 308                         PROC_STATUNLOCK(p);
 309                         PROC_UNLOCK(p);
 310                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 311                         break;
 312                 case LINUX_CPUCLOCK_SCHED:
 313                         kern_process_cputime(p, &tp);
 314                         PROC_UNLOCK(p);
 315                         break;
 316                 default:
 317                         PROC_UNLOCK(p);
 318                         return (EINVAL);
 319                 }
 320
 321                 break;
 322
 323         case CLOCK_THREAD_CPUTIME_ID:
 324                 if (args->which < 0) {
 325                         clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
 326                         tid = LINUX_CPUCLOCK_ID(args->which);
 327                 } else {
 328                         clockwhich = LINUX_CPUCLOCK_SCHED;
 329                         tid = 0;
 330                 }
 331                 p = td->td_proc;
 332                 if (tid == 0) {
 333                         targettd = td;
 334                         PROC_LOCK(p);
 335                 } else {
 336                         targettd = linux_tdfind(td, tid, p->p_pid);
 337                         if (targettd == NULL)
 338                                 return (EINVAL);
 339                 }
 340                 switch (clockwhich) {
 341                 case LINUX_CPUCLOCK_PROF:
 342                         PROC_STATLOCK(p);
 343                         thread_lock(targettd);
 344                         rufetchtd(targettd, &ru);
 345                         thread_unlock(targettd);
 346                         PROC_STATUNLOCK(p);
 347                         PROC_UNLOCK(p);
 348                         timevaladd(&ru.ru_utime, &ru.ru_stime);
 349                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 350                         break;
 351                 case LINUX_CPUCLOCK_VIRT:
 352                         PROC_STATLOCK(p);
 353                         thread_lock(targettd);
 354                         rufetchtd(targettd, &ru);
 355                         thread_unlock(targettd);
 356                         PROC_STATUNLOCK(p);
 357                         PROC_UNLOCK(p);
 358                         TIMEVAL_TO_TIMESPEC(&ru.ru_utime, &tp);
 359                         break;
 360                 case LINUX_CPUCLOCK_SCHED:
 361                         if (td == targettd)
 362                                 targettd = NULL;
 363                         kern_thread_cputime(targettd, &tp);
 364                         PROC_UNLOCK(p);
 365                         break;
 366                 default:
 367                         PROC_UNLOCK(p);
 368                         return (EINVAL);
 369                 }
 370                 break;
 371
 372         default:
 373                 error = kern_clock_gettime(td, nwhich, &tp);
 374                 break;
 375         }
 376         if (error != 0) {
 377                 LIN_SDT_PROBE1(time, linux_clock_gettime, gettime_error, error);
 378                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
 379                 return (error);
 380         }
 381         error = native_to_linux_timespec(&lts, &tp);
 382         if (error != 0)
 383                 return (error);
 384         error = copyout(&lts, args->tp, sizeof lts);
 385         if (error != 0)
 386                 LIN_SDT_PROBE1(time, linux_clock_gettime, copyout_error, error);
 387
 388         LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
 389         return (error);
 390 }
 391
 392 int
 393 linux_clock_settime(struct thread *td, struct linux_clock_settime_args *args)
 394 {
 395         struct timespec ts;
 396         struct l_timespec lts;
 397         int error;
 398         clockid_t nwhich;
 399
 400         LIN_SDT_PROBE2(time, linux_clock_settime, entry, args->which, args->tp);
 401
 402         error = linux_to_native_clockid(&nwhich, args->which);
 403         if (error != 0) {
 404                 linux_msg(curthread,
 405                     "unsupported clock_settime clockid %d", args->which);
 406                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
 407                     error);
 408                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 409                 return (error);
 410         }
 411         error = copyin(args->tp, &lts, sizeof lts);
 412         if (error != 0) {
 413                 LIN_SDT_PROBE1(time, linux_clock_settime, copyin_error, error);
 414                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 415                 return (error);
 416         }
 417         error = linux_to_native_timespec(&ts, &lts);
 418         if (error != 0) {
 419                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
 420                     error);
 421                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 422                 return (error);
 423         }
 424
 425         error = kern_clock_settime(td, nwhich, &ts);
 426         if (error != 0)
 427                 LIN_SDT_PROBE1(time, linux_clock_settime, settime_error, error);
 428
 429         LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 430         return (error);
 431 }
 432
 433 int
 434 linux_clock_getres(struct thread *td, struct linux_clock_getres_args *args)
 435 {
 436         struct proc *p;
 437         struct timespec ts;
 438         struct l_timespec lts;
 439         int error, clockwhich;
 440         clockid_t nwhich;
 441         pid_t pid;
 442         lwpid_t tid;
 443
 444         LIN_SDT_PROBE2(time, linux_clock_getres, entry, args->which, args->tp);
 445
 446         error = linux_to_native_clockid(&nwhich, args->which);
 447         if (error != 0) {
 448                 linux_msg(curthread,
 449                     "unsupported clock_getres clockid %d", args->which);
 450                 LIN_SDT_PROBE1(time, linux_clock_getres, conversion_error,
 451                     error);
 452                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
 453                 return (error);
 454         }
 455
 456         /*
 457          * Check user supplied clock id in case of per-process
 458          * or thread-specific cpu-time clock.
 459          */
 460         if (args->which < 0) {
 461                 switch (nwhich) {
 462                 case CLOCK_THREAD_CPUTIME_ID:
 463                         tid = LINUX_CPUCLOCK_ID(args->which);
 464                         if (tid != 0) {
 465                                 p = td->td_proc;
 466                                 if (linux_tdfind(td, tid, p->p_pid) == NULL)
 467                                         return (EINVAL);
 468                                 PROC_UNLOCK(p);
 469                         }
 470                         break;
 471                 case CLOCK_PROCESS_CPUTIME_ID:
 472                         pid = LINUX_CPUCLOCK_ID(args->which);
 473                         if (pid != 0) {
 474                                 error = pget(pid, PGET_CANSEE, &p);
 475                                 if (error != 0)
 476                                         return (EINVAL);
 477                                 PROC_UNLOCK(p);
 478                         }
 479                         break;
 480                 }
 481         }
 482
 483         if (args->tp == NULL) {
 484                 LIN_SDT_PROBE0(time, linux_clock_getres, nullcall);
 485                 LIN_SDT_PROBE1(time, linux_clock_getres, return, 0);
 486                 return (0);
 487         }
 488
 489         switch (nwhich) {
 490         case CLOCK_THREAD_CPUTIME_ID:
 491         case CLOCK_PROCESS_CPUTIME_ID:
 492                 clockwhich = LINUX_CPUCLOCK_WHICH(args->which);
 493                 /*
 494                  * In both cases (when the clock id obtained by a call to
 495                  * clock_getcpuclockid() or using the clock
 496                  * ID CLOCK_PROCESS_CPUTIME_ID Linux hardcodes precision
 497                  * of clock. The same for the CLOCK_THREAD_CPUTIME_ID clock.
 498                  *
 499                  * See Linux posix_cpu_clock_getres() implementation.
 500                  */
 501                 if (args->which > 0 || clockwhich == LINUX_CPUCLOCK_SCHED) {
 502                         ts.tv_sec = 0;
 503                         ts.tv_nsec = 1;
 504                         goto out;
 505                 }
 506
 507                 switch (clockwhich) {
 508                 case LINUX_CPUCLOCK_PROF:
 509                         nwhich = CLOCK_PROF;
 510                         break;
 511                 case LINUX_CPUCLOCK_VIRT:
 512                         nwhich = CLOCK_VIRTUAL;
 513                         break;
 514                 default:
 515                         return (EINVAL);
 516                 }
 517                 break;
 518
 519         default:
 520                 break;
 521         }
 522         error = kern_clock_getres(td, nwhich, &ts);
 523         if (error != 0) {
 524                 LIN_SDT_PROBE1(time, linux_clock_getres, getres_error, error);
 525                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
 526                 return (error);
 527         }
 528
 529 out:
 530         error = native_to_linux_timespec(&lts, &ts);
 531         if (error != 0)
 532                 return (error);
 533         error = copyout(&lts, args->tp, sizeof lts);
 534         if (error != 0)
 535                 LIN_SDT_PROBE1(time, linux_clock_getres, copyout_error, error);
 536
 537         LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
 538         return (error);
 539 }
 540
 541 int
 542 linux_nanosleep(struct thread *td, struct linux_nanosleep_args *args)
 543 {
 544         struct timespec *rmtp;
 545         struct l_timespec lrqts, lrmts;
 546         struct timespec rqts, rmts;
 547         int error, error2;
 548
 549         LIN_SDT_PROBE2(time, linux_nanosleep, entry, args->rqtp, args->rmtp);
 550
 551         error = copyin(args->rqtp, &lrqts, sizeof lrqts);
 552         if (error != 0) {
 553                 LIN_SDT_PROBE1(time, linux_nanosleep, copyin_error, error);
 554                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 555                 return (error);
 556         }
 557
 558         if (args->rmtp != NULL)
 559                 rmtp = &rmts;
 560         else
 561                 rmtp = NULL;
 562
 563         error = linux_to_native_timespec(&rqts, &lrqts);
 564         if (error != 0) {
 565                 LIN_SDT_PROBE1(time, linux_nanosleep, conversion_error, error);
 566                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 567                 return (error);
 568         }
 569         error = kern_nanosleep(td, &rqts, rmtp);
 570         if (error == EINTR && args->rmtp != NULL) {
 571                 error2 = native_to_linux_timespec(&lrmts, rmtp);
 572                 if (error2 != 0)
 573                         return (error2);
 574                 error2 = copyout(&lrmts, args->rmtp, sizeof(lrmts));
 575                 if (error2 != 0) {
 576                         LIN_SDT_PROBE1(time, linux_nanosleep, copyout_error,
 577                             error2);
 578                         LIN_SDT_PROBE1(time, linux_nanosleep, return, error2);
 579                         return (error2);
 580                 }
 581         }
 582
 583         LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
 584         return (error);
 585 }
 586
 587 int
 588 linux_clock_nanosleep(struct thread *td, struct linux_clock_nanosleep_args *args)
 589 {
 590         struct timespec *rmtp;
 591         struct l_timespec lrqts, lrmts;
 592         struct timespec rqts, rmts;
 593         int error, error2, flags;
 594         clockid_t clockid;
 595
 596         LIN_SDT_PROBE4(time, linux_clock_nanosleep, entry, args->which,
 597             args->flags, args->rqtp, args->rmtp);
 598
 599         error = linux_to_native_timerflags(&flags, args->flags);
 600         if (error != 0) {
 601                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_flags,
 602                     args->flags);
 603                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
 604                 return (error);
 605         }
 606
 607         error = linux_to_native_clockid(&clockid, args->which);
 608         if (error != 0) {
 609                 linux_msg(curthread,
 610                     "unsupported clock_nanosleep clockid %d", args->which);
 611                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_clockid,
 612                     args->which);
 613                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
 614                 return (error);
 615         }
 616
 617         error = copyin(args->rqtp, &lrqts, sizeof(lrqts));
 618         if (error != 0) {
 619                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, copyin_error,
 620                     error);
 621                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
 622                 return (error);
 623         }
 624
 625         if (args->rmtp != NULL)
 626                 rmtp = &rmts;
 627         else
 628                 rmtp = NULL;
 629
 630         error = linux_to_native_timespec(&rqts, &lrqts);
 631         if (error != 0) {
 632                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, conversion_error,
 633                     error);
 634                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
 635                 return (error);
 636         }
 637         error = kern_clock_nanosleep(td, clockid, flags, &rqts, rmtp);
 638         if (error == EINTR && (flags & TIMER_ABSTIME) == 0 &&
 639             args->rmtp != NULL) {
 640                 error2 = native_to_linux_timespec(&lrmts, rmtp);
 641                 if (error2 != 0)
 642                         return (error2);
 643                 error2 = copyout(&lrmts, args->rmtp, sizeof(lrmts));
 644                 if (error2 != 0) {
 645                         LIN_SDT_PROBE1(time, linux_clock_nanosleep,
 646                             copyout_error, error2);
 647                         LIN_SDT_PROBE1(time, linux_clock_nanosleep,
 648                             return, error2);
 649                         return (error2);
 650                 }
 651         }
 652
 653         LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
 654         return (error);
 655 }