sys/sys/disk.h

   1 /*
   2  * Copyright (c) 2003,2004 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * ----------------------------------------------------------------------------
  35  * "THE BEER-WARE LICENSE" (Revision 42):
  36  * <phk@FreeBSD.ORG> wrote this file.  As long as you retain this notice you
  37  * can do whatever you want with this stuff. If we meet some day, and you think
  38  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
  39  * ----------------------------------------------------------------------------
  40  *
  41  * $FreeBSD: src/sys/sys/disk.h,v 1.16.2.3 2001/06/20 16:11:01 scottl Exp $
  42  * $DragonFly: src/sys/sys/disk.h,v 1.7 2004/12/30 07:01:52 cpressey Exp $
  43  */
  44
  45 #ifndef _SYS_DISK_H_
  46 #define _SYS_DISK_H_
  47
  48 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
  49 #error "This file should not be included by userland programs."
  50 #endif
  51
  52 #ifndef _SYS_DISKSLICE_H_
  53 #include <sys/diskslice.h>
  54 #endif
  55
  56 #ifndef _SYS_DISKLABEL
  57 #include <sys/disklabel.h>
  58 #endif
  59
  60 #ifndef _SYS_DISKLABEL
  61 #include <sys/msgport.h>
  62 #endif
  63
  64 struct disk {
  65         struct lwkt_port        d_port;         /* interception port */
  66         struct cdevsw           *d_devsw;       /* our device switch */
  67         struct cdevsw           *d_rawsw;       /* the raw device switch */
  68         u_int                   d_flags;
  69         u_int                   d_dsflags;
  70         dev_t                   d_rawdev;       /* backing raw device */
  71         dev_t                   d_cdev;         /* special whole-disk part */
  72         struct diskslices       *d_slice;
  73         struct disklabel        d_label;
  74         LIST_ENTRY(disk)        d_list;
  75 };
  76
  77 #define DISKFLAG_LOCK           0x1
  78 #define DISKFLAG_WANTED         0x2
  79
  80 #ifdef _KERNEL
  81 dev_t disk_create (int unit, struct disk *disk, int flags, struct cdevsw *sw);
  82 void disk_destroy (struct disk *disk);
  83 int disk_dumpcheck (dev_t dev, u_int *count, u_int *blkno, u_int *secsize);
  84 struct disk *disk_enumerate (struct disk *disk);
  85 void disk_invalidate (struct disk *disk);
  86 #endif /* _KERNEL */
  87
  88 #endif /* _SYS_DISK_H_ */