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/10.4/sys/compat/linux/linux_timer.c 321012 2017-07-15 15:08:18Z dchagin $");
   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 
   53 static int
   54 linux_convert_l_sigevent(struct l_sigevent *l_sig, struct sigevent *sig)
   55 {
   56 
   57         CP(*l_sig, *sig, sigev_notify);
   58         switch (l_sig->sigev_notify) {
   59         case L_SIGEV_SIGNAL:
   60                 if (!LINUX_SIG_VALID(l_sig->sigev_signo))
   61                         return (EINVAL);
   62                 sig->sigev_notify = SIGEV_SIGNAL;
   63                 sig->sigev_signo = linux_to_bsd_signal(l_sig->sigev_signo);
   64                 PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
   65                 break;
   66         case L_SIGEV_NONE:
   67                 sig->sigev_notify = SIGEV_NONE;
   68                 break;
   69         case L_SIGEV_THREAD:
   70 #if 0
   71                 /* Seems to not be used anywhere (anymore)? */
   72                 sig->sigev_notify = SIGEV_THREAD;
   73                 return (ENOSYS);
   74 #else
   75                 return (EINVAL);
   76 #endif
   77         case L_SIGEV_THREAD_ID:
   78                 if (!LINUX_SIG_VALID(l_sig->sigev_signo))
   79                         return (EINVAL);
   80                 sig->sigev_notify = SIGEV_THREAD_ID;
   81                 CP2(*l_sig, *sig, _l_sigev_un._tid, sigev_notify_thread_id);
   82                 sig->sigev_signo = linux_to_bsd_signal(l_sig->sigev_signo);
   83                 PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
   84                 break;
   85         default:
   86                 return (EINVAL);
   87         }
   88         return (0);
   89 }
   90 
   91 int
   92 linux_timer_create(struct thread *td, struct linux_timer_create_args *uap)
   93 {
   94         struct l_sigevent l_ev;
   95         struct sigevent ev, *evp;
   96         clockid_t nwhich;
   97         int error, id;
   98 
   99         if (uap->evp == NULL) {
  100                 evp = NULL;
  101         } else {
  102                 error = copyin(uap->evp, &l_ev, sizeof(l_ev));
  103                 if (error != 0)
  104                         return (error);
  105                 error = linux_convert_l_sigevent(&l_ev, &ev);
  106                 if (error != 0)
  107                         return (error);
  108                 evp = &ev;
  109         }
  110         error = linux_to_native_clockid(&nwhich, uap->clock_id);
  111         if (error != 0)
  112                 return (error);
  113         error = kern_ktimer_create(td, nwhich, evp, &id, -1);
  114         if (error == 0) {
  115                 error = copyout(&id, uap->timerid, sizeof(int));
  116                 if (error != 0)
  117                         kern_ktimer_delete(td, id);
  118         }
  119         return (error);
  120 }
  121 
  122 int
  123 linux_timer_settime(struct thread *td, struct linux_timer_settime_args *uap)
  124 {
  125         struct l_itimerspec l_val, l_oval;
  126         struct itimerspec val, oval, *ovalp;
  127         int error;
  128 
  129         error = copyin(uap->new, &l_val, sizeof(l_val));
  130         if (error != 0)
  131                 return (error);
  132         ITS_CP(l_val, val);
  133         ovalp = uap->old != NULL ? &oval : NULL;
  134         error = kern_ktimer_settime(td, uap->timerid, uap->flags, &val, ovalp);
  135         if (error == 0 && uap->old != NULL) {
  136                 ITS_CP(oval, l_oval);
  137                 error = copyout(&l_oval, uap->old, sizeof(l_oval));
  138         }
  139         return (error);
  140 }
  141 
  142 int
  143 linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *uap)
  144 {
  145         struct l_itimerspec l_val;
  146         struct itimerspec val;
  147         int error;
  148 
  149         error = kern_ktimer_gettime(td, uap->timerid, &val);
  150         if (error == 0) {
  151                 ITS_CP(val, l_val);
  152                 error = copyout(&l_val, uap->setting, sizeof(l_val));
  153         }
  154         return (error);
  155 }
  156 
  157 int
  158 linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *uap)
  159 {
  160 
  161         return (kern_ktimer_getoverrun(td, uap->timerid));
  162 }
  163 
  164 int
  165 linux_timer_delete(struct thread *td, struct linux_timer_delete_args *uap)
  166 {
  167 
  168         return (kern_ktimer_delete(td, uap->timerid));
  169 }

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