sys/compat/linux/common/linux_blkio.c

   1 /*      $NetBSD: linux_blkio.c,v 1.16 2007/12/20 23:02:53 dsl 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 1.16 2007/12/20 23:02:53 dsl 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 }