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  * 4. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
   35  *
   36  *      @(#)vnioctl.h   8.1 (Berkeley) 6/10/93
   37  *
   38  * From: src/sys/sys/vnioctl.h,v 1.4
   39  *
   40  * $FreeBSD$
   41  */
   42 
   43 #ifndef _SYS_MDIOCTL_H_
   44 #define _SYS_MDIOCTL_H_
   45 
   46 enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP};
   47 
   48 /*
   49  * Ioctl definitions for memory disk pseudo-device.
   50  */
   51 
   52 #define MDNPAD          97
   53 struct md_ioctl {
   54         unsigned        md_version;     /* Structure layout version */
   55         unsigned        md_unit;        /* unit number */
   56         enum md_types   md_type ;       /* type of disk */
   57         char            *md_file;       /* pathname of file to mount */
   58         unsigned        md_size;        /* size of disk in DEV_BSIZE units */
   59         unsigned        md_options;     /* options */
   60         u_int64_t       md_base;        /* base address */
   61         int             md_secsize;     /* sectorsize */
   62         int             md_fwheads;     /* firmware heads */
   63         int             md_fwsectors;   /* firmware sectors */
   64         int             md_pad[MDNPAD]; /* padding for future ideas */
   65 };
   66 
   67 #define MD_NAME         "md"
   68 #define MD_MODNAME      "g_md"
   69 #define MDCTL_NAME      "mdctl"
   70 #define MDIOVERSION     0
   71 
   72 /*
   73  * Before you can use a unit, it must be configured with MDIOCSET.
   74  * The configuration persists across opens and closes of the device;
   75  * an MDIOCCLR must be used to reset a configuration.  An attempt to
   76  * MDIOCSET an already active unit will return EBUSY.
   77  */
   78 
   79 #define MDIOCATTACH     _IOWR('m', 0, struct md_ioctl)  /* attach disk */
   80 #define MDIOCDETACH     _IOWR('m', 1, struct md_ioctl)  /* detach disk */
   81 #define MDIOCQUERY      _IOWR('m', 2, struct md_ioctl)  /* query status */
   82 #define MDIOCLIST       _IOWR('m', 3, struct md_ioctl)  /* query status */
   83 
   84 #define MD_CLUSTER      0x01    /* Don't cluster */
   85 #define MD_RESERVE      0x02    /* Pre-reserve swap */
   86 #define MD_AUTOUNIT     0x04    /* Assign next free unit */
   87 #define MD_READONLY     0x08    /* Readonly mode */
   88 #define MD_COMPRESS     0x10    /* Compression mode */
   89 #define MD_FORCE        0x20    /* Don't try to prevent foot-shooting */
   90 #define MD_ASYNC        0x40    /* Don't try to prevent foot-shooting */
   91 
   92 #endif  /* _SYS_MDIOCTL_H_*/

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