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_blkio.c

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    1 /*      $NetBSD: linux_blkio.c,v 1.17 2008/03/21 21:54:58 ad 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 1.17 2008/03/21 21:54:58 ad 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/syscallargs.h>
   51 
   52 #include <compat/linux/common/linux_types.h>
   53 #include <compat/linux/common/linux_ioctl.h>
   54 #include <compat/linux/common/linux_signal.h>
   55 #include <compat/linux/common/linux_util.h>
   56 #include <compat/linux/common/linux_blkio.h>
   57 #include <compat/linux/common/linux_ipc.h>
   58 #include <compat/linux/common/linux_sem.h>
   59 
   60 #include <compat/linux/linux_syscallargs.h>
   61 
   62 int
   63 linux_ioctl_blkio(struct lwp *l, const struct linux_sys_ioctl_args *uap,
   64     register_t *retval)
   65 {
   66         u_long com;
   67         long size;
   68         int error;
   69         file_t *fp;
   70         int (*ioctlf)(file_t *, u_long, void *);
   71         struct partinfo partp;
   72         struct disklabel label;
   73 
   74         if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
   75                 return (EBADF);
   76 
   77         error = 0;
   78         ioctlf = fp->f_ops->fo_ioctl;
   79         com = SCARG(uap, com);
   80 
   81         switch (com) {
   82         case LINUX_BLKGETSIZE:
   83                 /*
   84                  * Try to get the partition size of this device. If that
   85                  * fails, it may be a disk without label; try to get
   86                  * the default label and compute the size from it.
   87                  */
   88                 error = ioctlf(fp, DIOCGPART, &partp);
   89                 if (error != 0) {
   90                         error = ioctlf(fp, DIOCGDEFLABEL, &label);
   91                         if (error != 0)
   92                                 break;
   93                         size = label.d_nsectors * label.d_ntracks *
   94                             label.d_ncylinders;
   95                 } else
   96                         size = partp.part->p_size;
   97                 error = copyout(&size, SCARG(uap, data), sizeof size);
   98                 break;
   99         case LINUX_BLKSECTGET:
  100                 error = ioctlf(fp, DIOCGDEFLABEL, &label);
  101                 if (error != 0)
  102                         break;
  103                 error = copyout(&label.d_secsize, SCARG(uap, data),
  104                     sizeof label.d_secsize);
  105                 break;
  106         case LINUX_BLKROSET:
  107         case LINUX_BLKROGET:
  108         case LINUX_BLKRRPART:
  109         case LINUX_BLKFLSBUF:
  110         case LINUX_BLKRASET:
  111         case LINUX_BLKRAGET:
  112         case LINUX_BLKFRASET:
  113         case LINUX_BLKFRAGET:
  114         case LINUX_BLKSECTSET:
  115         case LINUX_BLKSSZGET:
  116         case LINUX_BLKPG:
  117         default:
  118                 error = ENOTTY;
  119         }
  120 
  121         fd_putfile(SCARG(uap, fd));
  122 
  123         return error;
  124 }

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