sys/compat/netbsd32/netbsd32_event.c

   1 /*      $NetBSD: netbsd32_event.c,v 1.6.14.1 2009/01/04 01:56:02 christos Exp $ */
   2
   3 /*
   4  *  Copyright (c) 2005 The NetBSD Foundation.
   5  *  All rights reserved.
   6  *
   7  *  Redistribution and use in source and binary forms, with or without
   8  *  modification, are permitted provided that the following conditions
   9  *  are met:
  10  *  1. Redistributions of source code must retain the above copyright
  11  *     notice, this list of conditions and the following disclaimer.
  12  *  2. Redistributions in binary form must reproduce the above copyright
  13  *     notice, this list of conditions and the following disclaimer in the
  14  *     documentation and/or other materials provided with the distribution.
  15  *
  16  *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  *  POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD: netbsd32_event.c,v 1.6.14.1 2009/01/04 01:56:02 christos Exp $");
  31
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/file.h>
  36 #include <sys/filedesc.h>
  37 #include <sys/select.h>
  38 #include <sys/event.h>
  39 #include <sys/eventvar.h>
  40 #include <sys/malloc.h>
  41 #include <sys/proc.h>
  42 #include <sys/dirent.h>
  43
  44 #include <compat/netbsd32/netbsd32.h>
  45 #include <compat/netbsd32/netbsd32_syscall.h>
  46 #include <compat/netbsd32/netbsd32_syscallargs.h>
  47 #include <compat/netbsd32/netbsd32_conv.h>
  48
  49 static int
  50 netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
  51 {
  52         struct netbsd32_timespec ts32;
  53         int error;
  54
  55         KASSERT(length == sizeof(struct timespec));
  56
  57         error = copyin(src, &ts32, sizeof(ts32));
  58         if (error)
  59                 return error;
  60         netbsd32_to_timespec(&ts32, (struct timespec *)dest);
  61         return 0;
  62 }
  63
  64 static int
  65 netbsd32_kevent_fetch_changes(void *private, const struct kevent *changelist,
  66     struct kevent *changes, size_t index, int n)
  67 {
  68         const struct netbsd32_kevent *src =
  69             (const struct netbsd32_kevent *)changelist;
  70         struct netbsd32_kevent *kev32, *changes32 = private;
  71         int error, i;
  72
  73         error = copyin(src + index, changes32, n * sizeof(*changes32));
  74         if (error)
  75                 return error;
  76         for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
  77                 netbsd32_to_kevent(kev32, changes);
  78         return 0;
  79 }
  80
  81 static int
  82 netbsd32_kevent_put_events(void *private, struct kevent *events,
  83     struct kevent *eventlist, size_t index, int n)
  84 {
  85         struct netbsd32_kevent *kev32, *events32 = private;
  86         int i;
  87
  88         for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
  89                 netbsd32_from_kevent(events, kev32);
  90         kev32 = (struct netbsd32_kevent *)eventlist;
  91         return  copyout(events32, kev32, n * sizeof(*events32));
  92 }
  93
  94 int
  95 netbsd32___kevent50(struct lwp *l,
  96     const struct netbsd32___kevent50_args *uap, register_t *retval)
  97 {
  98         /* {
  99                 syscallarg(int) fd;
 100                 syscallarg(netbsd32_keventp_t) changelist;
 101                 syscallarg(netbsd32_size_t) nchanges;
 102                 syscallarg(netbsd32_keventp_t) eventlist;
 103                 syscallarg(netbsd32_size_t) nevents;
 104                 syscallarg(netbsd32_timespecp_t) timeout;
 105         } */
 106         int error;
 107         size_t maxalloc, nchanges, nevents;
 108         struct kevent_ops netbsd32_kevent_ops = {
 109                 keo_fetch_timeout: netbsd32_kevent_fetch_timeout,
 110                 keo_fetch_changes: netbsd32_kevent_fetch_changes,
 111                 keo_put_events: netbsd32_kevent_put_events,
 112         };
 113
 114         nchanges = SCARG(uap, nchanges);
 115         nevents = SCARG(uap, nevents);
 116         maxalloc = MIN(KQ_NEVENTS, MAX(nchanges, nevents));
 117         netbsd32_kevent_ops.keo_private =
 118             malloc(maxalloc * sizeof(struct netbsd32_kevent), M_TEMP,
 119             M_WAITOK);
 120
 121         error = kevent1(retval, SCARG(uap, fd),
 122             NETBSD32PTR64(SCARG(uap, changelist)), nchanges,
 123             NETBSD32PTR64(SCARG(uap, eventlist)), nevents,
 124             NETBSD32PTR64(SCARG(uap, timeout)), &netbsd32_kevent_ops);
 125
 126         free(netbsd32_kevent_ops.keo_private, M_TEMP);
 127         return error;
 128 }