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/sys/diskmbr.h

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    1 /*
    2  * Copyright (c) 1987, 1988, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)disklabel.h 8.2 (Berkeley) 7/10/94
   34  * $FreeBSD: releng/5.0/sys/sys/diskmbr.h 108569 2003-01-02 20:16:17Z phk $
   35  */
   36 
   37 #ifndef _SYS_DISKMBR_H_
   38 #define _SYS_DISKMBR_H_
   39 
   40 #include <sys/ioccom.h>
   41 
   42 #define DOSBBSECTOR     0       /* DOS boot block relative sector number */
   43 #define DOSPARTOFF      446
   44 #define NDOSPART        4
   45 #define DOSPTYP_386BSD  0xa5    /* 386BSD partition type */
   46 #define DOSPTYP_LINSWP  0x82    /* Linux swap partition */
   47 #define DOSPTYP_LINUX   0x83    /* Linux partition */
   48 #define DOSPTYP_EXT     5       /* DOS extended partition */
   49 #define DOSPTYP_EXTLBA  15      /* DOS extended partition */
   50 
   51 struct dos_partition {
   52         unsigned char   dp_flag;        /* bootstrap flags */
   53         unsigned char   dp_shd;         /* starting head */
   54         unsigned char   dp_ssect;       /* starting sector */
   55         unsigned char   dp_scyl;        /* starting cylinder */
   56         unsigned char   dp_typ;         /* partition type */
   57         unsigned char   dp_ehd;         /* end head */
   58         unsigned char   dp_esect;       /* end sector */
   59         unsigned char   dp_ecyl;        /* end cylinder */
   60         u_int32_t       dp_start;       /* absolute starting sector number */
   61         u_int32_t       dp_size;        /* partition size in sectors */
   62 };
   63 #ifdef CTASSERT
   64 CTASSERT(sizeof (struct dos_partition) == 16);
   65 #endif
   66 
   67 #define DPSECT(s) ((s) & 0x3f)          /* isolate relevant bits of sector */
   68 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */
   69 
   70 #define DIOCGMBR        _IOR('M', 128, u_char[512])
   71 #define DIOCSMBR        _IOW('M', 129, u_char[512])
   72 
   73 
   74 #endif /* !_SYS_DISKMBR_H_ */

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