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_timer.c

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    1 /*-
    2  * Copyright (c) 2014 Bjoern A. Zeeb
    3  * All rights reserved.
    4  *
    5  * This software was developed by SRI International and the University of
    6  * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249
    7  * ("MRC2"), as part of the DARPA MRC research programme.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/10.2/sys/compat/linux/linux_timer.c 272020 2014-09-23 07:50:04Z bz $");
   32 
   33 #include "opt_compat.h"
   34 
   35 #include <sys/param.h>
   36 #include <sys/errno.h>
   37 #include <sys/signal.h>
   38 #include <sys/syscallsubr.h>
   39 #include <sys/systm.h>
   40 #include <sys/time.h>
   41 #include <sys/types.h>
   42 
   43 #ifdef COMPAT_LINUX32
   44 #include <machine/../linux32/linux.h>
   45 #include <machine/../linux32/linux32_proto.h>
   46 #else
   47 #include <machine/../linux/linux.h>
   48 #include <machine/../linux/linux_proto.h>
   49 #endif
   50 #include <compat/linux/linux_timer.h>
   51 
   52 static int
   53 linux_convert_l_clockid(clockid_t *clock_id)
   54 {
   55 
   56         switch (*clock_id) {
   57         case LINUX_CLOCK_REALTIME:
   58                 *clock_id = CLOCK_REALTIME;
   59                 break;
   60         case LINUX_CLOCK_MONOTONIC:
   61                 *clock_id = CLOCK_MONOTONIC;
   62                 break;
   63         default:
   64                 return (EINVAL);
   65         }
   66 
   67         return (0);
   68 }
   69 
   70 static int
   71 linux_convert_l_sigevent(struct l_sigevent *l_sig, struct sigevent *sig)
   72 {
   73 
   74         CP(*l_sig, *sig, sigev_notify);
   75         switch (l_sig->sigev_notify) {
   76         case L_SIGEV_SIGNAL:
   77                 sig->sigev_notify = SIGEV_SIGNAL;
   78                 CP(*l_sig, *sig, sigev_signo);
   79                 PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
   80                 break;
   81         case L_SIGEV_NONE:
   82                 sig->sigev_notify = SIGEV_NONE;
   83                 break;
   84         case L_SIGEV_THREAD:
   85 #if 0
   86                 /* Seems to not be used anywhere (anymore)? */
   87                 sig->sigev_notify = SIGEV_THREAD;
   88                 return (ENOSYS);
   89 #else
   90                 return (EINVAL);
   91 #endif
   92         case L_SIGEV_THREAD_ID:
   93                 sig->sigev_notify = SIGEV_THREAD_ID;
   94                 CP2(*l_sig, *sig, _l_sigev_un._tid, sigev_notify_thread_id);
   95                 CP(*l_sig, *sig, sigev_signo);
   96                 PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
   97                 break;
   98         default:
   99                 return (EINVAL);
  100         }
  101         return (0);
  102 }
  103 
  104 int
  105 linux_timer_create(struct thread *td, struct linux_timer_create_args *uap)
  106 {
  107         struct l_sigevent l_ev;
  108         struct sigevent ev, *evp;
  109         int error, id;
  110 
  111         if (uap->evp == NULL) {
  112                 evp = NULL;
  113         } else {
  114                 error = copyin(uap->evp, &l_ev, sizeof(l_ev));
  115                 if (error != 0)
  116                         return (error);
  117                 error = linux_convert_l_sigevent(&l_ev, &ev);
  118                 if (error != 0)
  119                         return (error);
  120                 evp = &ev;
  121         }
  122         error = linux_convert_l_clockid(&uap->clock_id);
  123         if (error != 0)
  124                 return (error);
  125         error = kern_ktimer_create(td, uap->clock_id, evp, &id, -1);
  126         if (error == 0) {
  127                 error = copyout(&id, uap->timerid, sizeof(int));
  128                 if (error != 0)
  129                         kern_ktimer_delete(td, id);
  130         }
  131         return (error);
  132 }
  133 
  134 int
  135 linux_timer_settime(struct thread *td, struct linux_timer_settime_args *uap)
  136 {
  137         struct l_itimerspec l_val, l_oval;
  138         struct itimerspec val, oval, *ovalp;
  139         int error;
  140 
  141         error = copyin(uap->new, &l_val, sizeof(l_val));
  142         if (error != 0)
  143                 return (error);
  144         ITS_CP(l_val, val);
  145         ovalp = uap->old != NULL ? &oval : NULL;
  146         error = kern_ktimer_settime(td, uap->timerid, uap->flags, &val, ovalp);
  147         if (error == 0 && uap->old != NULL) {
  148                 ITS_CP(oval, l_oval);
  149                 error = copyout(&l_oval, uap->old, sizeof(l_oval));
  150         }
  151         return (error);
  152 }
  153 
  154 int
  155 linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *uap)
  156 {
  157         struct l_itimerspec l_val;
  158         struct itimerspec val;
  159         int error;
  160 
  161         error = kern_ktimer_gettime(td, uap->timerid, &val);
  162         if (error == 0) {
  163                 ITS_CP(val, l_val);
  164                 error = copyout(&l_val, uap->setting, sizeof(l_val));
  165         }
  166         return (error);
  167 }
  168 
  169 int
  170 linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *uap)
  171 {
  172 
  173         return (kern_ktimer_getoverrun(td, uap->timerid));
  174 }
  175 
  176 int
  177 linux_timer_delete(struct thread *td, struct linux_timer_delete_args *uap)
  178 {
  179 
  180         return (kern_ktimer_delete(td, uap->timerid));
  181 }
  182 

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