sys/compat/freebsd/freebsd_ioctl.c

   1 /*      $NetBSD: freebsd_ioctl.c,v 1.14 2007/12/08 18:35:58 dsl Exp $   */
   2
   3 /*
   4  * Copyright (c) 1995 Frank van der Linden
   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  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed for the NetBSD Project
  18  *      by Frank van der Linden
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: freebsd_ioctl.c,v 1.14 2007/12/08 18:35:58 dsl Exp $");
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/proc.h>
  40 #include <sys/mount.h>
  41 #include <sys/sockio.h>
  42
  43 #include <sys/syscallargs.h>
  44
  45 #include <net/if.h>
  46
  47 #include <compat/sys/sockio.h>
  48
  49 #include <compat/freebsd/freebsd_syscallargs.h>
  50 #include <compat/common/compat_util.h>
  51 #include <compat/freebsd/freebsd_ioctl.h>
  52
  53 #include <compat/ossaudio/ossaudio.h>
  54 #include <compat/ossaudio/ossaudiovar.h>
  55
  56 /* The FreeBSD and OSS(Linux) encodings of ioctl R/W differ. */
  57 static void freebsd_to_oss(const struct freebsd_sys_ioctl_args *,
  58                            struct oss_sys_ioctl_args *);
  59
  60 static void
  61 freebsd_to_oss(const struct freebsd_sys_ioctl_args *uap, struct oss_sys_ioctl_args *rap)
  62 {
  63         u_long ocmd, ncmd;
  64
  65         ocmd = SCARG(uap, com);
  66         ncmd = ocmd &~ FREEBSD_IOC_DIRMASK;
  67         switch(ocmd & FREEBSD_IOC_DIRMASK) {
  68         case FREEBSD_IOC_VOID:  ncmd |= OSS_IOC_VOID;  break;
  69         case FREEBSD_IOC_OUT:   ncmd |= OSS_IOC_OUT;   break;
  70         case FREEBSD_IOC_IN:    ncmd |= OSS_IOC_IN;    break;
  71         case FREEBSD_IOC_INOUT: ncmd |= OSS_IOC_INOUT; break;
  72         }
  73         SCARG(rap, fd) = SCARG(uap, fd);
  74         SCARG(rap, com) = ncmd;
  75         SCARG(rap, data) = SCARG(uap, data);
  76 }
  77
  78
  79 static void freebsd_to_netbsd_ifioctl(const struct freebsd_sys_ioctl_args *uap,
  80                                       struct sys_ioctl_args *nap);
  81
  82 static void
  83 freebsd_to_netbsd_ifioctl(const struct freebsd_sys_ioctl_args *uap, struct sys_ioctl_args *nap)
  84 {
  85         u_long ocmd, ncmd;
  86         ocmd = SCARG(uap, com);
  87         switch (ocmd) {
  88         case FREEBSD_SIOCALIFADDR:
  89                 ncmd =SIOCALIFADDR;
  90                 break;
  91         case FREEBSD_SIOCGLIFADDR:
  92                 ncmd =SIOCGLIFADDR;
  93                 break;
  94         case FREEBSD_SIOCDLIFADDR:
  95                 ncmd =SIOCDLIFADDR;
  96                 break;
  97         case FREEBSD_SIOCGIFMTU:
  98                 ncmd = SIOCGIFMTU;
  99                 break;
 100         case FREEBSD_SIOCSIFMTU:
 101                 ncmd = SIOCSIFMTU;
 102                 break;
 103         default:
 104                 ncmd = ocmd;
 105                 break;
 106         }
 107         SCARG(nap, fd) = SCARG(uap, fd);
 108         SCARG(nap, com) = ncmd;
 109         SCARG(nap, data) = SCARG(uap, data);
 110 }
 111
 112 int
 113 freebsd_sys_ioctl(struct lwp *l, const struct freebsd_sys_ioctl_args *uap, register_t *retval)
 114 {
 115         /* {
 116                 syscallarg(int) fd;
 117                 syscallarg(u_long) com;
 118                 syscallarg(void *) data;
 119         } */
 120         struct oss_sys_ioctl_args ap;
 121         struct sys_ioctl_args nap;
 122
 123         /*
 124          * XXX - <sys/cdio.h>'s incompatibility
 125          *      _IO('c', 25..27, *):    incompatible
 126          *      _IO('c', 28... , *):    not exist
 127          */
 128         /* XXX - <sys/mtio.h> */
 129         /* XXX - <sys/scsiio.h> */
 130         /* XXX - should convert machine dependent ioctl()s */
 131
 132         switch (FREEBSD_IOCGROUP(SCARG(uap, com))) {
 133         case 'M':
 134                 freebsd_to_oss(uap, &ap);
 135                 return oss_ioctl_mixer(l, &ap, retval);
 136         case 'Q':
 137                 freebsd_to_oss(uap, &ap);
 138                 return oss_ioctl_sequencer(l, &ap, retval);
 139         case 'P':
 140                 freebsd_to_oss(uap, &ap);
 141                 return oss_ioctl_audio(l, &ap, retval);
 142         case 'i':
 143                 freebsd_to_netbsd_ifioctl(uap, &nap);
 144                 return sys_ioctl(l, &nap, retval);
 145         default:
 146                 return sys_ioctl(l, (const void *)uap, retval);
 147         }
 148 }