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/geom/geom_ctl.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2003 Poul-Henning Kamp
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The names of the authors may not be used to endorse or promote
   16  *    products derived from this software without specific prior written
   17  *    permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD: releng/12.0/sys/geom/geom_ctl.h 326270 2017-11-27 15:17:37Z pfg $
   32  */
   33 
   34 #ifndef _GEOM_GEOM_CTL_H_
   35 #define _GEOM_GEOM_CTL_H_
   36 
   37 #include <sys/ioccom.h>
   38 
   39 /*
   40  * Version number.  Used to check consistency between kernel and libgeom.
   41  */
   42 #define GCTL_VERSION    2
   43 
   44 struct gctl_req_arg {
   45         u_int                           nlen;
   46         char                            *name;
   47         off_t                           offset;
   48         int                             flag;
   49         int                             len;
   50         void                            *value;
   51         /* kernel only fields */
   52         void                            *kvalue;
   53 };
   54 
   55 #define GCTL_PARAM_RD           1       /* Must match VM_PROT_READ */
   56 #define GCTL_PARAM_WR           2       /* Must match VM_PROT_WRITE */
   57 #define GCTL_PARAM_RW           (GCTL_PARAM_RD | GCTL_PARAM_WR)
   58 #define GCTL_PARAM_ASCII        4
   59 
   60 /* These are used in the kernel only */
   61 #define GCTL_PARAM_NAMEKERNEL   8
   62 #define GCTL_PARAM_VALUEKERNEL  16
   63 #define GCTL_PARAM_CHANGED      32
   64 
   65 struct gctl_req {
   66         u_int                           version;
   67         u_int                           serial;
   68         u_int                           narg;
   69         struct gctl_req_arg             *arg;
   70         u_int                           lerror;
   71         char                            *error;
   72         struct gctl_req_table           *reqt;
   73 
   74         /* kernel only fields */
   75         int                             nerror;
   76         struct sbuf                     *serror;
   77 };
   78 
   79 #define GEOM_CTL        _IOW('G', GCTL_VERSION, struct gctl_req)
   80 
   81 #define PATH_GEOM_CTL   "geom.ctl"
   82 
   83 
   84 #endif /* _GEOM_GEOM_CTL_H_ */

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