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  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1988 University of Utah.
    5  * Copyright (c) 1990, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * This code is derived from software contributed to Berkeley by
    9  * the Systems Programming Group of the University of Utah Computer
   10  * Science Department.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
   37  *
   38  *      @(#)vnioctl.h   8.1 (Berkeley) 6/10/93
   39  *
   40  * From: src/sys/sys/vnioctl.h,v 1.4
   41  *
   42  * $FreeBSD: stable/12/sys/sys/mdioctl.h 330881 2018-03-13 20:54:18Z brooks $
   43  */
   44 
   45 #ifndef _SYS_MDIOCTL_H_
   46 #define _SYS_MDIOCTL_H_
   47 
   48 enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP, MD_NULL};
   49 
   50 /*
   51  * Ioctl definitions for memory disk pseudo-device.
   52  */
   53 
   54 #define MDNPAD          96
   55 struct md_ioctl {
   56         unsigned        md_version;     /* Structure layout version */
   57         unsigned        md_unit;        /* unit number */
   58         enum md_types   md_type ;       /* type of disk */
   59         char            *md_file;       /* pathname of file to mount */
   60         off_t           md_mediasize;   /* size of disk in bytes */
   61         unsigned        md_sectorsize;  /* sectorsize */
   62         unsigned        md_options;     /* options */
   63         u_int64_t       md_base;        /* base address */
   64         int             md_fwheads;     /* firmware heads */
   65         int             md_fwsectors;   /* firmware sectors */
   66         char            *md_label;      /* label of the device */
   67         int             md_pad[MDNPAD]; /* storage for MDIOCLIST */
   68 };
   69 
   70 #define MD_NAME         "md"
   71 #define MDCTL_NAME      "mdctl"
   72 #define MDIOVERSION     0
   73 
   74 /*
   75  * Before you can use a unit, it must be configured with MDIOCSET.
   76  * The configuration persists across opens and closes of the device;
   77  * an MDIOCCLR must be used to reset a configuration.  An attempt to
   78  * MDIOCSET an already active unit will return EBUSY.
   79  */
   80 
   81 #define MDIOCATTACH     _IOWR('m', 0, struct md_ioctl)  /* attach disk */
   82 #define MDIOCDETACH     _IOWR('m', 1, struct md_ioctl)  /* detach disk */
   83 #define MDIOCQUERY      _IOWR('m', 2, struct md_ioctl)  /* query status */
   84 #define MDIOCLIST       _IOWR('m', 3, struct md_ioctl)  /* query status */
   85 #define MDIOCRESIZE     _IOWR('m', 4, struct md_ioctl)  /* resize disk */
   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 #define MD_ASYNC        0x40    /* Asynchronous mode */
   94 #define MD_VERIFY       0x80    /* Open file with O_VERIFY (vnode only) */
   95 
   96 #endif  /* _SYS_MDIOCTL_H_*/

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