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/vnioctl.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 
   43 #ifndef _SYS_VNIOCTL_H_
   44 #define _SYS_VNIOCTL_H_
   45 
   46 /*
   47  * Ioctl definitions for file (vnode) disk pseudo-device.
   48  */
   49 
   50 #define _PATH_VNTAB     "/etc/vntab"    /* default config file */
   51 
   52 struct vn_ioctl {
   53         char    *vn_file;       /* pathname of file to mount */
   54         int     vn_size;        /* (returned) size of disk */
   55 };
   56 
   57 /*
   58  * Before you can use a unit, it must be configured with VNIOCSET.
   59  * The configuration persists across opens and closes of the device;
   60  * an VNIOCCLR must be used to reset a configuration.  An attempt to
   61  * VNIOCSET an already active unit will return EBUSY.
   62  */
   63 #define VNIOCATTACH     _IOWR('F', 0, struct vn_ioctl)  /* attach file */
   64 #define VNIOCDETACH     _IOWR('F', 1, struct vn_ioctl)  /* detach disk */
   65 #define VNIOCGSET       _IOWR('F', 2, u_long )          /* set global option */
   66 #define VNIOCGCLEAR     _IOWR('F', 3, u_long )          /* reset --//-- */
   67 #define VNIOCUSET       _IOWR('F', 4, u_long )          /* set unit option */
   68 #define VNIOCUCLEAR     _IOWR('F', 5, u_long )          /* reset --//-- */
   69 
   70 #define VN_LABELS       0x1     /* Use disk(/slice) labels */
   71 #define VN_FOLLOW       0x2     /* Debug flow in vn driver */
   72 #define VN_DEBUG        0x4     /* Debug data in vn driver */
   73 #define VN_IO           0x8     /* Debug I/O in vn driver */
   74 #define VN_DONTCLUSTER  0x10    /* Don't cluster */
   75 
   76 #endif  /* _SYS_VNIOCTL_H_*/

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