FreeBSD/Linux Kernel Cross Reference
sys/compat/freebsd/freebsd_ioctl.c

     /*      $NetBSD: freebsd_ioctl.c,v 1.15 2007/12/20 23:02:47 dsl Exp $   */
     
     /*
      * Copyright (c) 1995 Frank van der Linden
      * All rights reserved.
      *
      * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed for the NetBSD Project
     *      by Frank van der Linden
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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>
    __KERNEL_RCSID(0, "$NetBSD: freebsd_ioctl.c,v 1.15 2007/12/20 23:02:47 dsl Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/proc.h>
    #include <sys/mount.h>
    #include <sys/sockio.h>
    
    #include <sys/syscallargs.h>
    
    #include <net/if.h>
    
    #include <compat/sys/sockio.h>
    
    #include <compat/freebsd/freebsd_syscallargs.h>
    #include <compat/common/compat_util.h>
    #include <compat/freebsd/freebsd_ioctl.h>
    
    #include <compat/ossaudio/ossaudio.h>
    #include <compat/ossaudio/ossaudiovar.h>
    
    /* The FreeBSD and OSS(Linux) encodings of ioctl R/W differ. */
    static void freebsd_to_oss(const struct freebsd_sys_ioctl_args *,
                               struct oss_sys_ioctl_args *);
    
    static void
    freebsd_to_oss(const struct freebsd_sys_ioctl_args *uap, struct oss_sys_ioctl_args *rap)
    {
            u_long ocmd, ncmd;
    
            ocmd = SCARG(uap, com);
            ncmd = ocmd &~ FREEBSD_IOC_DIRMASK;
            switch(ocmd & FREEBSD_IOC_DIRMASK) {
            case FREEBSD_IOC_VOID:  ncmd |= OSS_IOC_VOID;  break;
            case FREEBSD_IOC_OUT:   ncmd |= OSS_IOC_OUT;   break;
            case FREEBSD_IOC_IN:    ncmd |= OSS_IOC_IN;    break;
            case FREEBSD_IOC_INOUT: ncmd |= OSS_IOC_INOUT; break;
            }
            SCARG(rap, fd) = SCARG(uap, fd);
            SCARG(rap, com) = ncmd;
            SCARG(rap, data) = SCARG(uap, data);
    }
    
    
    static void freebsd_to_netbsd_ifioctl(const struct freebsd_sys_ioctl_args *uap,
                                          struct sys_ioctl_args *nap);
    
    static void
    freebsd_to_netbsd_ifioctl(const struct freebsd_sys_ioctl_args *uap, struct sys_ioctl_args *nap)
    {
            u_long ocmd, ncmd;
            ocmd = SCARG(uap, com);
            switch (ocmd) {
            case FREEBSD_SIOCALIFADDR:
                    ncmd =SIOCALIFADDR;
                    break;
            case FREEBSD_SIOCGLIFADDR:
                    ncmd =SIOCGLIFADDR;
                    break;
            case FREEBSD_SIOCDLIFADDR:
                    ncmd =SIOCDLIFADDR;
                    break;
            case FREEBSD_SIOCGIFMTU:
                    ncmd = SIOCGIFMTU;
                    break;
           case FREEBSD_SIOCSIFMTU:
                   ncmd = SIOCSIFMTU;
                   break;
           default:
                   ncmd = ocmd;
                   break;
           }
           SCARG(nap, fd) = SCARG(uap, fd);
           SCARG(nap, com) = ncmd;
           SCARG(nap, data) = SCARG(uap, data);
   }
   
   int
   freebsd_sys_ioctl(struct lwp *l, const struct freebsd_sys_ioctl_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) fd;
                   syscallarg(u_long) com;
                   syscallarg(void *) data;
           } */
           struct oss_sys_ioctl_args ap;
           struct sys_ioctl_args nap;
   
           /*
            * XXX - <sys/cdio.h>'s incompatibility
            *      _IO('c', 25..27, *):    incompatible
            *      _IO('c', 28... , *):    not exist
            */
           /* XXX - <sys/mtio.h> */
           /* XXX - <sys/scsiio.h> */
           /* XXX - should convert machine dependent ioctl()s */
   
           switch (FREEBSD_IOCGROUP(SCARG(uap, com))) {
           case 'M':
                   freebsd_to_oss(uap, &ap);
                   return oss_ioctl_mixer(l, &ap, retval);
           case 'Q':
                   freebsd_to_oss(uap, &ap);
                   return oss_ioctl_sequencer(l, &ap, retval);
           case 'P':
                   freebsd_to_oss(uap, &ap);
                   return oss_ioctl_audio(l, &ap, retval);
           case 'i':
                   freebsd_to_netbsd_ifioctl(uap, &nap);
                   return sys_ioctl(l, &nap, retval);
           default:
                   return sys_ioctl(l, (const void *)uap, retval);
           }
   }

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