FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_ioctl.c

     /*      $NetBSD: linux_ioctl.c,v 1.38.4.1 2004/10/08 03:21:21 jmc Exp $ */
     
     /*-
      * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Frank van der Linden and Eric Haszlakiewicz.
      *
     * 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 by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
    __KERNEL_RCSID(0, "$NetBSD: linux_ioctl.c,v 1.38.4.1 2004/10/08 03:21:21 jmc Exp $");
    
    #if defined(_KERNEL_OPT)
    #include "sequencer.h"
    #endif
    
    #include <sys/param.h>
    #include <sys/proc.h>
    #include <sys/systm.h>
    #include <sys/conf.h>
    #include <sys/ioctl.h>
    #include <sys/mount.h>
    #include <sys/file.h>
    #include <sys/vnode.h>
    #include <sys/filedesc.h>
    
    #include <sys/socket.h>
    #include <net/if.h>
    #include <sys/sockio.h>
    
    #include <sys/sa.h>
    #include <sys/syscallargs.h>
    
    #include <compat/linux/common/linux_types.h>
    #include <compat/linux/common/linux_signal.h>
    #include <compat/linux/common/linux_ioctl.h>
    
    #include <compat/linux/linux_syscallargs.h>
    
    #include <compat/ossaudio/ossaudio.h>
    #define LINUX_TO_OSS(v) (v)     /* do nothing, same ioctl() encoding */
    
    /*
     * Most ioctl command are just converted to their NetBSD values,
     * and passed on. The ones that take structure pointers and (flag)
     * values need some massaging. This is done the usual way by
     * allocating stackgap memory, letting the actual ioctl call do its
     * work there and converting back the data afterwards.
     */
    int
    linux_sys_ioctl(l, v, retval)
            struct lwp *l;
            void *v;
            register_t *retval;
    {
            struct linux_sys_ioctl_args /* {
                    syscallarg(int) fd;
                    syscallarg(u_long) com;
                    syscallarg(caddr_t) data;
            } */ *uap = v;
            struct proc *p = l->l_proc;
            int error;
    
            switch (LINUX_IOCGROUP(SCARG(uap, com))) {
            case 'M':
                    error = oss_ioctl_mixer(p, LINUX_TO_OSS(v), retval);
                    break;
            case 'Q':
                    error = oss_ioctl_sequencer(p, LINUX_TO_OSS(v), retval);
                    break;
           case 'P':
                   error = oss_ioctl_audio(p, LINUX_TO_OSS(v), retval);
                   break;
           case 'r': /* VFAT ioctls; not yet supported */
                   error = ENOSYS;
                   break;
           case 'S':
                   error = linux_ioctl_cdrom(p, uap, retval);
                   break;
           case 't':
           case 'f':
                   error = linux_ioctl_termios(p, uap, retval);
                   break;
           case 'T':
           {
   #if NSEQUENCER > 0
   /* XXX XAX 2x check this. */
                   /*
                    * Both termios and the MIDI sequncer use 'T' to identify
                    * the ioctl, so we have to differentiate them in another
                    * way.  We do it by indexing in the cdevsw with the major
                    * device number and check if that is the sequencer entry.
                    */
                   struct file *fp;
                   struct filedesc *fdp;
                   struct vnode *vp;
                   struct vattr va;
                   extern const struct cdevsw sequencer_cdevsw;
   
                   fdp = p->p_fd;
                   if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
                           return EBADF;
                   FILE_USE(fp);
                   if (fp->f_type == DTYPE_VNODE &&
                       (vp = (struct vnode *)fp->f_data) != NULL &&
                       vp->v_type == VCHR &&
                       VOP_GETATTR(vp, &va, p->p_ucred, p) == 0 &&
                       cdevsw_lookup(va.va_rdev) == &sequencer_cdevsw) {
                           error = oss_ioctl_sequencer(p, (void*)LINUX_TO_OSS(uap),
                                                      retval);
                   }
                   else {
                           error = linux_ioctl_termios(p, uap, retval);
                   }
                   FILE_UNUSE(fp, p);
   #else
                   error = linux_ioctl_termios(p, uap, retval);
   #endif
           }
                   break;
           case 0x89:
                   error = linux_ioctl_socket(p, uap, retval);
                   break;
           case 0x03:
                   error = linux_ioctl_hdio(p, uap, retval);
                   break;
           case 0x02:
                   error = linux_ioctl_fdio(p, uap, retval);
                   break;
           case 0x12:
                   error = linux_ioctl_blkio(p, uap, retval);
                   break;
           default:
                   error = linux_machdepioctl(p, uap, retval);
                   break;
           }
           if (error == EPASSTHROUGH) {
                   /*
                    * linux returns EINVAL or ENOTTY for not supported ioctls.
                    */ 
                   error = EINVAL;
           }
   
           return error;
   }

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