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

     /*      $NetBSD: linux_ioctl.c,v 1.55 2008/07/19 23:01:52 jmcneill Exp $        */
     
     /*-
      * Copyright (c) 1995, 1998, 2008 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.
     *
     * 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 1.55 2008/07/19 23:01:52 jmcneill 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/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/common/linux_ipc.h>
    #include <compat/linux/common/linux_sem.h>
    
    #include <compat/linux/linux_syscallargs.h>
    
    #include <compat/ossaudio/ossaudio.h>
    #define LINUX_TO_OSS(v) ((const void *)(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.
     */
    int
    linux_sys_ioctl(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(int) fd;
                    syscallarg(u_long) com;
                    syscallarg(void *) data;
            } */
            int error;
    
            switch (LINUX_IOCGROUP(SCARG(uap, com))) {
            case 'M':
                    error = oss_ioctl_mixer(l, LINUX_TO_OSS(uap), retval);
                    break;
            case 'Q':
                    error = oss_ioctl_sequencer(l, LINUX_TO_OSS(uap), retval);
                    break;
            case 'P':
                    error = oss_ioctl_audio(l, LINUX_TO_OSS(uap), retval);
                    break;
            case 'V':       /* video4linux2 */
            case 'd':       /* drm */
            {
                    struct sys_ioctl_args ua;
                    u_long com = 0;
                    if (SCARG(uap, com) & IOC_IN)
                            com |= IOC_OUT;
                    if (SCARG(uap, com) & IOC_OUT)
                            com |= IOC_IN;
                   SCARG(&ua, fd) = SCARG(uap, fd);
                   SCARG(&ua, com) = SCARG(uap, com);
                   SCARG(&ua, com) &= ~IOC_DIRMASK;
                   SCARG(&ua, com) |= com;
                   SCARG(&ua, data) = SCARG(uap, data);
                   error = sys_ioctl(l, (const void *)&ua, retval);
                   break;
           }
           case 'r': /* VFAT ioctls; not yet supported */
                   error = ENOSYS;
                   break;
           case 'S':
                   error = linux_ioctl_cdrom(l, uap, retval);
                   break;
           case 't':
           case 'f':
                   error = linux_ioctl_termios(l, uap, retval);
                   break;
           case 'm':
                   error = linux_ioctl_mtio(l, 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 vnode *vp;
                   struct vattr va;
                   extern const struct cdevsw sequencer_cdevsw;
   
                   if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
                           return EBADF;
                   if (fp->f_type == DTYPE_VNODE &&
                       (vp = (struct vnode *)fp->f_data) != NULL &&
                       vp->v_type == VCHR &&
                       VOP_GETATTR(vp, &va, l->l_cred) == 0 &&
                       cdevsw_lookup(va.va_rdev) == &sequencer_cdevsw) {
                           error = oss_ioctl_sequencer(l, (const void *)LINUX_TO_OSS(uap),
                                                      retval);
                   }
                   else {
                           error = linux_ioctl_termios(l, uap, retval);
                   }
                   fd_putfile(SCARG(uap, fd));
   #else
                   error = linux_ioctl_termios(l, uap, retval);
   #endif
           }
                   break;
           case '"':
                   error = linux_ioctl_sg(l, uap, retval);
                   break;
           case 0x89:
                   error = linux_ioctl_socket(l, uap, retval);
                   break;
           case 0x03:
                   error = linux_ioctl_hdio(l, uap, retval);
                   break;
           case 0x02:
                   error = linux_ioctl_fdio(l, uap, retval);
                   break;
           case 0x12:
                   error = linux_ioctl_blkio(l, uap, retval);
                   break;
           default:
                   error = linux_machdepioctl(l, uap, retval);
                   break;
           }
           if (error == EPASSTHROUGH) {
                   /*
                    * linux returns EINVAL or ENOTTY for not supported ioctls.
                    */ 
                   error = EINVAL;
           }
   
           return error;
   }

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