The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: linux_fdio.c,v 1.7 2003/06/29 22:29:28 fvdl Exp $      */
    2 
    3 /*
    4  * Copyright (c) 2000 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Frank van der Linden for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 #include <sys/cdefs.h>
   39 __KERNEL_RCSID(0, "$NetBSD: linux_fdio.c,v 1.7 2003/06/29 22:29:28 fvdl Exp $");
   40 
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/ioctl.h>
   44 #include <sys/file.h>
   45 #include <sys/filedesc.h>
   46 #include <sys/mount.h>
   47 #include <sys/proc.h>
   48 #include <sys/disklabel.h>
   49 
   50 #include <sys/fdio.h>
   51 
   52 #include <sys/sa.h>
   53 #include <sys/syscallargs.h>
   54 
   55 #include <dev/isa/fdreg.h>
   56 
   57 #include <compat/linux/common/linux_types.h>
   58 #include <compat/linux/common/linux_ioctl.h>
   59 #include <compat/linux/common/linux_signal.h>
   60 #include <compat/linux/common/linux_util.h>
   61 #include <compat/linux/common/linux_fdio.h>
   62 
   63 #include <compat/linux/linux_syscallargs.h>
   64 
   65 int
   66 linux_ioctl_fdio(struct proc *p, struct linux_sys_ioctl_args *uap,
   67                  register_t *retval)
   68 {
   69         struct filedesc *fdp;
   70         struct file *fp;
   71         int error;
   72         int (*ioctlf)(struct file *, u_long, void *, struct proc *);
   73         u_long com;
   74         struct fdformat_parms fparams;
   75         struct linux_floppy_struct lflop;
   76         struct linux_floppy_drive_struct ldrive;
   77 
   78         com = (u_long)SCARG(uap, data);
   79 
   80         fdp = p->p_fd;
   81         if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
   82                 return (EBADF);
   83 
   84         FILE_USE(fp);
   85 
   86         com = SCARG(uap, com);
   87         ioctlf = fp->f_ops->fo_ioctl;
   88 
   89         retval[0] = error = 0;
   90 
   91         switch (com) {
   92         case LINUX_FDMSGON:
   93         case LINUX_FDMSGOFF:
   94         case LINUX_FDTWADDLE:
   95         case LINUX_FDCLRPRM:
   96                 /* whatever you say */
   97                 break;
   98         case LINUX_FDPOLLDRVSTAT:
   99                 /*
  100                  * Just fill in some innocent defaults.
  101                  */
  102                 memset(&ldrive, 0, sizeof ldrive);
  103                 ldrive.fd_ref = 1;
  104                 ldrive.maxblock = 2;
  105                 ldrive.maxtrack = ldrive.track = 1;
  106                 ldrive.flags = LINUX_FD_DISK_WRITABLE;
  107                 error = copyout(&ldrive, SCARG(uap, data), sizeof ldrive);
  108                 break;
  109         case LINUX_FDGETPRM:
  110                 error = ioctlf(fp, FDIOCGETFORMAT, (caddr_t)&fparams, p);
  111                 if (error != 0)
  112                         break;
  113                 lflop.size = fparams.ncyl * fparams.nspt * fparams.ntrk;
  114                 lflop.sect = fparams.nspt;
  115                 lflop.head = fparams.ntrk;
  116                 lflop.track = fparams.ncyl;
  117                 lflop.stretch = fparams.stepspercyl == 2 ? 1 : 0;
  118                 lflop.fmt_gap = fparams.gaplen;
  119                 /*
  120                  * XXXX Use knowledge of floppy for these fields.
  121                  * FDIOCGETFORMAT does not provide enough information.
  122                  * It would be better to have FDIOCGETFORMAT return more
  123                  * information.
  124                  */
  125                 switch (fparams.xfer_rate) {
  126                 case 500 * 1024:
  127                         lflop.spec1 = 0xcf;
  128                         lflop.gap = 0x1b;
  129                         lflop.rate = FDC_500KBPS;
  130                         break;
  131                 case 300 * 1024:
  132                         lflop.spec1 = 0xdf;
  133                         lflop.gap = 0x23;
  134                         lflop.rate = FDC_300KBPS;
  135                         break;
  136                 case 250 * 1024:
  137                         lflop.spec1 = 0xdf;
  138                         lflop.gap = 0x2a;
  139                         lflop.rate = FDC_250KBPS;
  140                         break;
  141                 }
  142                 error = copyout(&lflop, SCARG(uap, data), sizeof lflop);
  143                 break;
  144         case LINUX_FDSETPRM:
  145                 /*
  146                  * Should use FDIOCSETFORMAT here, iff its interface
  147                  * is extended.
  148                  */
  149         case LINUX_FDDEFPRM:
  150         case LINUX_FDFMTBEG:
  151         case LINUX_FDFMTTRK:
  152         case LINUX_FDFMTEND:
  153         case LINUX_FDSETEMSGTRESH:
  154         case LINUX_FDFLUSH:
  155         case LINUX_FDSETMAXERRS:
  156         case LINUX_FDGETMAXERRS:
  157         case LINUX_FDGETDRVTYP:
  158         case LINUX_FDSETDRVPRM:
  159         case LINUX_FDGETDRVPRM:
  160         case LINUX_FDGETDRVSTAT:
  161         case LINUX_FDRESET:
  162         case LINUX_FDGETFDCSTAT:
  163         case LINUX_FDWERRORCLR:
  164         case LINUX_FDWERRORGET:
  165         case LINUX_FDRAWCMD:
  166         case LINUX_FDEJECT:
  167         default:
  168                 error = EINVAL;
  169         }
  170 
  171         FILE_UNUSE(fp, p);
  172 
  173         return 0;
  174 }

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