linux_blkio.c

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    1 /*      $NetBSD: linux_blkio.c,v 1.9 2003/06/29 22:29:26 fvdl Exp $     */
    2 
    3 /*
    4  * Copyright (c) 2001 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_blkio.c,v 1.9 2003/06/29 22:29:26 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/sa.h>
   51 #include <sys/syscallargs.h>
   52 
   53 #include <compat/linux/common/linux_types.h>
   54 #include <compat/linux/common/linux_ioctl.h>
   55 #include <compat/linux/common/linux_signal.h>
   56 #include <compat/linux/common/linux_util.h>
   57 #include <compat/linux/common/linux_blkio.h>
   58 
   59 #include <compat/linux/linux_syscallargs.h>
   60 
   61 int
   62 linux_ioctl_blkio(struct proc *p, struct linux_sys_ioctl_args *uap,
   63                   register_t *retval)
   64 {
   65         u_long com;
   66         long size;
   67         int error;
   68         struct filedesc *fdp;
   69         struct file *fp;
   70         int (*ioctlf)(struct file *, u_long, void *, struct proc *);
   71         struct partinfo partp;
   72         struct disklabel label;
   73 
   74         fdp = p->p_fd;
   75         if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
   76                 return (EBADF);
   77 
   78         FILE_USE(fp);
   79         error = 0;
   80         ioctlf = fp->f_ops->fo_ioctl;
   81         com = SCARG(uap, com);
   82 
   83         switch (com) {
   84         case LINUX_BLKGETSIZE:
   85                 /*
   86                  * Try to get the partition size of this device. If that
   87                  * fails, it may be a disk without label; try to get
   88                  * the default label and compute the size from it.
   89                  */
   90                 error = ioctlf(fp, DIOCGPART, (caddr_t)&partp, p);
   91                 if (error != 0) {
   92                         error = ioctlf(fp, DIOCGDEFLABEL, (caddr_t)&label, p);
   93                         if (error != 0)
   94                                 break;
   95                         size = label.d_nsectors * label.d_ntracks *
   96                             label.d_ncylinders;
   97                 } else
   98                         size = partp.part->p_size;
   99                 error = copyout(&size, SCARG(uap, data), sizeof size);
  100                 break;
  101         case LINUX_BLKSECTGET:
  102                 error = ioctlf(fp, DIOCGDEFLABEL, (caddr_t)&label, p);
  103                 if (error != 0)
  104                         break;
  105                 error = copyout(&label.d_secsize, SCARG(uap, data),
  106                     sizeof label.d_secsize);
  107                 break;
  108         case LINUX_BLKROSET:
  109         case LINUX_BLKROGET:
  110         case LINUX_BLKRRPART:
  111         case LINUX_BLKFLSBUF:
  112         case LINUX_BLKRASET:
  113         case LINUX_BLKRAGET:
  114         case LINUX_BLKFRASET:
  115         case LINUX_BLKFRAGET:
  116         case LINUX_BLKSECTSET:
  117         case LINUX_BLKSSZGET:
  118         case LINUX_BLKPG:
  119         default:
  120                 error = ENOTTY;
  121         }
  122 
  123         FILE_UNUSE(fp, p);
  124 
  125         return error;
  126 }

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

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