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/10.2/sys/compat/linux/linux_time.c 246085 2013-01-29 18:41:30Z jhb $");
   34 #if 0
   35 __KERNEL_RCSID(0, "$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/ucred.h>
   44 #include <sys/mount.h>
   45 #include <sys/sdt.h>
   46 #include <sys/signal.h>
   47 #include <sys/stdint.h>
   48 #include <sys/syscallsubr.h>
   49 #include <sys/sysproto.h>
   50 #include <sys/time.h>
   51 #include <sys/systm.h>
   52 #include <sys/proc.h>
   53 
   54 #ifdef COMPAT_LINUX32
   55 #include <machine/../linux32/linux.h>
   56 #include <machine/../linux32/linux32_proto.h>
   57 #else
   58 #include <machine/../linux/linux.h>
   59 #include <machine/../linux/linux_proto.h>
   60 #endif
   61 
   62 #include <compat/linux/linux_dtrace.h>
   63 #include <compat/linux/linux_misc.h>
   64 
   65 /* DTrace init */
   66 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
   67 
   68 /**
   69  * DTrace probes in this module.
   70  */
   71 LIN_SDT_PROBE_DEFINE2(time, native_to_linux_timespec, entry,
   72     "struct l_timespec *", "struct timespec *");
   73 LIN_SDT_PROBE_DEFINE0(time, native_to_linux_timespec, return);
   74 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_timespec, entry,
   75     "struct timespec *", "struct l_timespec *");
   76 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_timespec, return, "int");
   77 LIN_SDT_PROBE_DEFINE2(time, linux_to_native_clockid, entry, "clockid_t *",
   78     "clockid_t");
   79 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unsupported_clockid,
   80     "clockid_t");
   81 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, unknown_clockid,
   82     "clockid_t");
   83 LIN_SDT_PROBE_DEFINE1(time, linux_to_native_clockid, return, "int");
   84 LIN_SDT_PROBE_DEFINE2(time, linux_clock_gettime, entry, "clockid_t",
   85     "struct l_timespec *");
   86 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, conversion_error, "int");
   87 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, gettime_error, "int");
   88 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, copyout_error, "int");
   89 LIN_SDT_PROBE_DEFINE1(time, linux_clock_gettime, return, "int");
   90 LIN_SDT_PROBE_DEFINE2(time, linux_clock_settime, entry, "clockid_t",
   91     "struct l_timespec *");
   92 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, conversion_error, "int");
   93 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, settime_error, "int");
   94 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, copyin_error, "int");
   95 LIN_SDT_PROBE_DEFINE1(time, linux_clock_settime, return, "int");
   96 LIN_SDT_PROBE_DEFINE2(time, linux_clock_getres, entry, "clockid_t",
   97     "struct l_timespec *");
   98 LIN_SDT_PROBE_DEFINE0(time, linux_clock_getres, nullcall);
   99 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, conversion_error, "int");
  100 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, getres_error, "int");
  101 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, copyout_error, "int");
  102 LIN_SDT_PROBE_DEFINE1(time, linux_clock_getres, return, "int");
  103 LIN_SDT_PROBE_DEFINE2(time, linux_nanosleep, entry, "const struct l_timespec *",
  104     "struct l_timespec *");
  105 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, conversion_error, "int");
  106 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, nanosleep_error, "int");
  107 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyout_error, "int");
  108 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, copyin_error, "int");
  109 LIN_SDT_PROBE_DEFINE1(time, linux_nanosleep, return, "int");
  110 LIN_SDT_PROBE_DEFINE4(time, linux_clock_nanosleep, entry, "clockid_t", "int",
  111     "struct l_timespec *", "struct l_timespec *");
  112 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, conversion_error, "int");
  113 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, nanosleep_error, "int");
  114 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyout_error, "int");
  115 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, copyin_error, "int");
  116 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_flags, "int");
  117 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, unsupported_clockid, "int");
  118 LIN_SDT_PROBE_DEFINE1(time, linux_clock_nanosleep, return, "int");
  119 
  120 static void native_to_linux_timespec(struct l_timespec *,
  121                                      struct timespec *);
  122 static int linux_to_native_timespec(struct timespec *,
  123                                      struct l_timespec *);
  124 static int linux_to_native_clockid(clockid_t *, clockid_t);
  125 
  126 static void
  127 native_to_linux_timespec(struct l_timespec *ltp, struct timespec *ntp)
  128 {
  129 
  130         LIN_SDT_PROBE2(time, native_to_linux_timespec, entry, ltp, ntp);
  131 
  132         ltp->tv_sec = ntp->tv_sec;
  133         ltp->tv_nsec = ntp->tv_nsec;
  134 
  135         LIN_SDT_PROBE0(time, native_to_linux_timespec, return);
  136 }
  137 
  138 static int
  139 linux_to_native_timespec(struct timespec *ntp, struct l_timespec *ltp)
  140 {
  141 
  142         LIN_SDT_PROBE2(time, linux_to_native_timespec, entry, ntp, ltp);
  143 
  144         if (ltp->tv_sec < 0 || ltp->tv_nsec > (l_long)999999999L) {
  145                 LIN_SDT_PROBE1(time, linux_to_native_timespec, return, EINVAL);
  146                 return (EINVAL);
  147         }
  148         ntp->tv_sec = ltp->tv_sec;
  149         ntp->tv_nsec = ltp->tv_nsec;
  150 
  151         LIN_SDT_PROBE1(time, linux_to_native_timespec, return, 0);
  152         return (0);
  153 }
  154 
  155 static int
  156 linux_to_native_clockid(clockid_t *n, clockid_t l)
  157 {
  158 
  159         LIN_SDT_PROBE2(time, linux_to_native_clockid, entry, n, l);
  160 
  161         switch (l) {
  162         case LINUX_CLOCK_REALTIME:
  163                 *n = CLOCK_REALTIME;
  164                 break;
  165         case LINUX_CLOCK_MONOTONIC:
  166                 *n = CLOCK_MONOTONIC;
  167                 break;
  168         case LINUX_CLOCK_PROCESS_CPUTIME_ID:
  169         case LINUX_CLOCK_THREAD_CPUTIME_ID:
  170         case LINUX_CLOCK_REALTIME_HR:
  171         case LINUX_CLOCK_MONOTONIC_HR:
  172                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
  173                     unsupported_clockid, l);
  174                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
  175                 return (EINVAL);
  176                 break;
  177         default:
  178                 LIN_SDT_PROBE1(time, linux_to_native_clockid,
  179                     unknown_clockid, l);
  180                 LIN_SDT_PROBE1(time, linux_to_native_clockid, return, EINVAL);
  181                 return (EINVAL);
  182                 break;
  183         }
  184 
  185         LIN_SDT_PROBE1(time, linux_to_native_clockid, return, 0);
  186         return (0);
  187 }
  188 
  189 int
  190 linux_clock_gettime(struct thread *td, struct linux_clock_gettime_args *args)
  191 {
  192         struct l_timespec lts;
  193         int error;
  194         clockid_t nwhich = 0;   /* XXX: GCC */
  195         struct timespec tp;
  196 
  197         LIN_SDT_PROBE2(time, linux_clock_gettime, entry, args->which, args->tp);
  198 
  199         error = linux_to_native_clockid(&nwhich, args->which);
  200         if (error != 0) {
  201                 LIN_SDT_PROBE1(time, linux_clock_gettime, conversion_error,
  202                     error);
  203                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
  204                 return (error);
  205         }
  206         error = kern_clock_gettime(td, nwhich, &tp);
  207         if (error != 0) {
  208                 LIN_SDT_PROBE1(time, linux_clock_gettime, gettime_error, error);
  209                 LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
  210                 return (error);
  211         }
  212         native_to_linux_timespec(&lts, &tp);
  213 
  214         error = copyout(&lts, args->tp, sizeof lts);
  215         if (error != 0)
  216                 LIN_SDT_PROBE1(time, linux_clock_gettime, copyout_error, error);
  217 
  218         LIN_SDT_PROBE1(time, linux_clock_gettime, return, error);
  219         return (error);
  220 }
  221 
  222 int
  223 linux_clock_settime(struct thread *td, struct linux_clock_settime_args *args)
  224 {
  225         struct timespec ts;
  226         struct l_timespec lts;
  227         int error;
  228         clockid_t nwhich = 0;   /* XXX: GCC */
  229 
  230         LIN_SDT_PROBE2(time, linux_clock_settime, entry, args->which, args->tp);
  231 
  232         error = linux_to_native_clockid(&nwhich, args->which);
  233         if (error != 0) {
  234                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
  235                     error);
  236                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  237                 return (error);
  238         }
  239         error = copyin(args->tp, &lts, sizeof lts);
  240         if (error != 0) {
  241                 LIN_SDT_PROBE1(time, linux_clock_settime, copyin_error, error);
  242                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  243                 return (error);
  244         }
  245         error = linux_to_native_timespec(&ts, &lts);
  246         if (error != 0) {
  247                 LIN_SDT_PROBE1(time, linux_clock_settime, conversion_error,
  248                     error);
  249                 LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  250                 return (error);
  251         }
  252 
  253         error = kern_clock_settime(td, nwhich, &ts);
  254         if (error != 0)
  255                 LIN_SDT_PROBE1(time, linux_clock_settime, settime_error, error);
  256 
  257         LIN_SDT_PROBE1(time, linux_clock_settime, return, error);
  258         return (error);
  259 }
  260 
  261 int
  262 linux_clock_getres(struct thread *td, struct linux_clock_getres_args *args)
  263 {
  264         struct timespec ts;
  265         struct l_timespec lts;
  266         int error;
  267         clockid_t nwhich = 0;   /* XXX: GCC */
  268 
  269         LIN_SDT_PROBE2(time, linux_clock_getres, entry, args->which, args->tp);
  270 
  271         if (args->tp == NULL) {
  272                 LIN_SDT_PROBE0(time, linux_clock_getres, nullcall);
  273                 LIN_SDT_PROBE1(time, linux_clock_getres, return, 0);
  274                 return (0);
  275         }
  276 
  277         error = linux_to_native_clockid(&nwhich, args->which);
  278         if (error != 0) {
  279                 LIN_SDT_PROBE1(time, linux_clock_getres, conversion_error,
  280                     error);
  281                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
  282                 return (error);
  283         }
  284         error = kern_clock_getres(td, nwhich, &ts);
  285         if (error != 0) {
  286                 LIN_SDT_PROBE1(time, linux_clock_getres, getres_error, error);
  287                 LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
  288                 return (error);
  289         }
  290         native_to_linux_timespec(&lts, &ts);
  291 
  292         error = copyout(&lts, args->tp, sizeof lts);
  293         if (error != 0)
  294                 LIN_SDT_PROBE1(time, linux_clock_getres, copyout_error, error);
  295 
  296         LIN_SDT_PROBE1(time, linux_clock_getres, return, error);
  297         return (error);
  298 }
  299 
  300 int
  301 linux_nanosleep(struct thread *td, struct linux_nanosleep_args *args)
  302 {
  303         struct timespec *rmtp;
  304         struct l_timespec lrqts, lrmts;
  305         struct timespec rqts, rmts;
  306         int error;
  307 
  308         LIN_SDT_PROBE2(time, linux_nanosleep, entry, args->rqtp, args->rmtp);
  309 
  310         error = copyin(args->rqtp, &lrqts, sizeof lrqts);
  311         if (error != 0) {
  312                 LIN_SDT_PROBE1(time, linux_nanosleep, copyin_error, error);
  313                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  314                 return (error);
  315         }
  316 
  317         if (args->rmtp != NULL)
  318                 rmtp = &rmts;
  319         else
  320                 rmtp = NULL;
  321 
  322         error = linux_to_native_timespec(&rqts, &lrqts);
  323         if (error != 0) {
  324                 LIN_SDT_PROBE1(time, linux_nanosleep, conversion_error, error);
  325                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  326                 return (error);
  327         }
  328         error = kern_nanosleep(td, &rqts, rmtp);
  329         if (error != 0) {
  330                 LIN_SDT_PROBE1(time, linux_nanosleep, nanosleep_error, error);
  331                 LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  332                 return (error);
  333         }
  334 
  335         if (args->rmtp != NULL) {
  336                 native_to_linux_timespec(&lrmts, rmtp);
  337                 error = copyout(&lrmts, args->rmtp, sizeof(lrmts));
  338                 if (error != 0) {
  339                         LIN_SDT_PROBE1(time, linux_nanosleep, copyout_error,
  340                             error);
  341                         LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  342                         return (error);
  343                 }
  344         }
  345 
  346         LIN_SDT_PROBE1(time, linux_nanosleep, return, 0);
  347         return (0);
  348 }
  349 
  350 int
  351 linux_clock_nanosleep(struct thread *td, struct linux_clock_nanosleep_args *args)
  352 {
  353         struct timespec *rmtp;
  354         struct l_timespec lrqts, lrmts;
  355         struct timespec rqts, rmts;
  356         int error;
  357 
  358         LIN_SDT_PROBE4(time, linux_clock_nanosleep, entry, args->which,
  359             args->flags, args->rqtp, args->rmtp);
  360 
  361         if (args->flags != 0) {
  362                 /* XXX deal with TIMER_ABSTIME */
  363                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_flags,
  364                     args->flags);
  365                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
  366                 return (EINVAL);        /* XXX deal with TIMER_ABSTIME */
  367         }
  368 
  369         if (args->which != LINUX_CLOCK_REALTIME) {
  370                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, unsupported_clockid,
  371                     args->which);
  372                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, EINVAL);
  373                 return (EINVAL);
  374         }
  375 
  376         error = copyin(args->rqtp, &lrqts, sizeof lrqts);
  377         if (error != 0) {
  378                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, copyin_error,
  379                     error);
  380                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
  381                 return (error);
  382         }
  383 
  384         if (args->rmtp != NULL)
  385                 rmtp = &rmts;
  386         else
  387                 rmtp = NULL;
  388 
  389         error = linux_to_native_timespec(&rqts, &lrqts);
  390         if (error != 0) {
  391                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, conversion_error,
  392                     error);
  393                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
  394                 return (error);
  395         }
  396         error = kern_nanosleep(td, &rqts, rmtp);
  397         if (error != 0) {
  398                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, nanosleep_error,
  399                     error);
  400                 LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, error);
  401                 return (error);
  402         }
  403 
  404         if (args->rmtp != NULL) {
  405                 native_to_linux_timespec(&lrmts, rmtp);
  406                 error = copyout(&lrmts, args->rmtp, sizeof lrmts );
  407                 if (error != 0) {
  408                         LIN_SDT_PROBE1(time, linux_clock_nanosleep,
  409                             copyout_error, error);
  410                         LIN_SDT_PROBE1(time, linux_nanosleep, return, error);
  411                         return (error);
  412                 }
  413         }
  414 
  415         LIN_SDT_PROBE1(time, linux_clock_nanosleep, return, 0);
  416         return (0);
  417 }

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