FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_timer.c

     /*-
      * Copyright (c) 2014 Bjoern A. Zeeb
      * All rights reserved.
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249
      * ("MRC2"), as part of the DARPA MRC research programme.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include "opt_compat.h"
    
    #include <sys/param.h>
    #include <sys/errno.h>
    #include <sys/signal.h>
    #include <sys/syscallsubr.h>
    #include <sys/systm.h>
    #include <sys/time.h>
    #include <sys/types.h>
    
    #ifdef COMPAT_LINUX32
    #include <machine/../linux32/linux.h>
    #include <machine/../linux32/linux32_proto.h>
    #else
    #include <machine/../linux/linux.h>
    #include <machine/../linux/linux_proto.h>
    #endif
    #include <compat/linux/linux_timer.h>
    
    static int
    linux_convert_l_sigevent(struct l_sigevent *l_sig, struct sigevent *sig)
    {
    
            CP(*l_sig, *sig, sigev_notify);
            switch (l_sig->sigev_notify) {
            case L_SIGEV_SIGNAL:
                    if (!LINUX_SIG_VALID(l_sig->sigev_signo))
                            return (EINVAL);
                    sig->sigev_notify = SIGEV_SIGNAL;
                    sig->sigev_signo = linux_to_bsd_signal(l_sig->sigev_signo);
                    PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
                    break;
            case L_SIGEV_NONE:
                    sig->sigev_notify = SIGEV_NONE;
                    break;
            case L_SIGEV_THREAD:
    #if 0
                    /* Seems to not be used anywhere (anymore)? */
                    sig->sigev_notify = SIGEV_THREAD;
                    return (ENOSYS);
    #else
                    return (EINVAL);
    #endif
            case L_SIGEV_THREAD_ID:
                    if (!LINUX_SIG_VALID(l_sig->sigev_signo))
                            return (EINVAL);
                    sig->sigev_notify = SIGEV_THREAD_ID;
                    CP2(*l_sig, *sig, _l_sigev_un._tid, sigev_notify_thread_id);
                    sig->sigev_signo = linux_to_bsd_signal(l_sig->sigev_signo);
                    PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
                    break;
            default:
                    return (EINVAL);
            }
            return (0);
    }
    
    int
    linux_timer_create(struct thread *td, struct linux_timer_create_args *uap)
    {
            struct l_sigevent l_ev;
            struct sigevent ev, *evp;
            clockid_t nwhich;
            int error, id;
    
            if (uap->evp == NULL) {
                    evp = NULL;
           } else {
                   error = copyin(uap->evp, &l_ev, sizeof(l_ev));
                   if (error != 0)
                           return (error);
                   error = linux_convert_l_sigevent(&l_ev, &ev);
                   if (error != 0)
                           return (error);
                   evp = &ev;
           }
           error = linux_to_native_clockid(&nwhich, uap->clock_id);
           if (error != 0)
                   return (error);
           error = kern_ktimer_create(td, nwhich, evp, &id, -1);
           if (error == 0) {
                   error = copyout(&id, uap->timerid, sizeof(int));
                   if (error != 0)
                           kern_ktimer_delete(td, id);
           }
           return (error);
   }
   
   int
   linux_timer_settime(struct thread *td, struct linux_timer_settime_args *uap)
   {
           struct l_itimerspec l_val, l_oval;
           struct itimerspec val, oval, *ovalp;
           int error;
   
           error = copyin(uap->new, &l_val, sizeof(l_val));
           if (error != 0)
                   return (error);
           ITS_CP(l_val, val);
           ovalp = uap->old != NULL ? &oval : NULL;
           error = kern_ktimer_settime(td, uap->timerid, uap->flags, &val, ovalp);
           if (error == 0 && uap->old != NULL) {
                   ITS_CP(oval, l_oval);
                   error = copyout(&l_oval, uap->old, sizeof(l_oval));
           }
           return (error);
   }
   
   int
   linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *uap)
   {
           struct l_itimerspec l_val;
           struct itimerspec val;
           int error;
   
           error = kern_ktimer_gettime(td, uap->timerid, &val);
           if (error == 0) {
                   ITS_CP(val, l_val);
                   error = copyout(&l_val, uap->setting, sizeof(l_val));
           }
           return (error);
   }
   
   int
   linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *uap)
   {
   
           return (kern_ktimer_getoverrun(td, uap->timerid));
   }
   
   int
   linux_timer_delete(struct thread *td, struct linux_timer_delete_args *uap)
   {
   
           return (kern_ktimer_delete(td, uap->timerid));
   }

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