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/mdioctl.h

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    1 /*
    2  * Copyright (c) 1988 University of Utah.
    3  * Copyright (c) 1990, 1993
    4  *      The Regents of the University of California.  All rights reserved.
    5  *
    6  * This code is derived from software contributed to Berkeley by
    7  * the Systems Programming Group of the University of Utah Computer
    8  * Science Department.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by the University of
   21  *      California, Berkeley and its contributors.
   22  * 4. Neither the name of the University nor the names of its contributors
   23  *    may be used to endorse or promote products derived from this software
   24  *    without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   36  * SUCH DAMAGE.
   37  *
   38  * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
   39  *
   40  *      @(#)vnioctl.h   8.1 (Berkeley) 6/10/93
   41  *
   42  * From: src/sys/sys/vnioctl.h,v 1.4
   43  *
   44  * $FreeBSD: releng/5.2/sys/sys/mdioctl.h 113289 2003-04-09 11:59:29Z phk $
   45  */
   46 
   47 #ifndef _SYS_MDIOCTL_H_
   48 #define _SYS_MDIOCTL_H_
   49 
   50 enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP};
   51 
   52 /*
   53  * Ioctl definitions for memory disk pseudo-device.
   54  */
   55 
   56 #define MDNPAD          97
   57 struct md_ioctl {
   58         unsigned        md_version;     /* Structure layout version */
   59         unsigned        md_unit;        /* unit number */
   60         enum md_types   md_type ;       /* type of disk */
   61         char            *md_file;       /* pathname of file to mount */
   62         unsigned        md_size;        /* size of disk in DEV_BSIZE units */
   63         unsigned        md_options;     /* options */
   64         u_int64_t       md_base;        /* base address */
   65         int             md_secsize;     /* sectorsize */
   66         int             md_fwheads;     /* firmware heads */
   67         int             md_fwsectors;   /* firmware sectors */
   68         int             md_pad[MDNPAD]; /* padding for future ideas */
   69 };
   70 
   71 #define MD_NAME         "md"
   72 #define MDCTL_NAME      "mdctl"
   73 #define MDIOVERSION     0
   74 
   75 /*
   76  * Before you can use a unit, it must be configured with MDIOCSET.
   77  * The configuration persists across opens and closes of the device;
   78  * an MDIOCCLR must be used to reset a configuration.  An attempt to
   79  * MDIOCSET an already active unit will return EBUSY.
   80  */
   81 
   82 #define MDIOCATTACH     _IOWR('m', 0, struct md_ioctl)  /* attach disk */
   83 #define MDIOCDETACH     _IOWR('m', 1, struct md_ioctl)  /* detach disk */
   84 #define MDIOCQUERY      _IOWR('m', 2, struct md_ioctl)  /* query status */
   85 #define MDIOCLIST       _IOWR('m', 3, struct md_ioctl)  /* query status */
   86 
   87 #define MD_CLUSTER      0x01    /* Don't cluster */
   88 #define MD_RESERVE      0x02    /* Pre-reserve swap */
   89 #define MD_AUTOUNIT     0x04    /* Assign next free unit */
   90 #define MD_READONLY     0x08    /* Readonly mode */
   91 #define MD_COMPRESS     0x10    /* Compression mode */
   92 #define MD_FORCE        0x20    /* Don't try to prevent foot-shooting */
   93 
   94 #endif  /* _SYS_MDIOCTL_H_*/

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