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FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_slice.h

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    1 /*-
    2  * Copyright (c) 2002 Poul-Henning Kamp
    3  * Copyright (c) 2002 Networks Associates Technology, Inc.
    4  * All rights reserved.
    5  *
    6  * This software was developed for the FreeBSD Project by Poul-Henning Kamp
    7  * and NAI Labs, the Security Research Division of Network Associates, Inc.
    8  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
    9  * DARPA CHATS research program.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. The names of the authors may not be used to endorse or promote
   20  *    products derived from this software without specific prior written
   21  *    permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  * $FreeBSD: src/sys/geom/geom_slice.h,v 1.9.2.1 2002/12/20 21:52:02 phk Exp $
   36  */
   37 
   38 #ifndef _GEOM_GEOM_SLICE_H_
   39 #define _GEOM_GEOM_SLICE_H_
   40 
   41 struct g_slice {
   42         off_t   offset;
   43         off_t   length;
   44         u_int   sectorsize;
   45         struct  g_provider *provider;
   46 };
   47 
   48 typedef int g_slice_start_t (struct bio *bp);
   49 
   50 struct g_slicer {
   51         u_int           nslice;
   52         u_int           nprovider;
   53         u_int           nhot;
   54         off_t           cfrontstuff;
   55         off_t           frontstuff;
   56         struct g_slice  *slices;
   57         struct g_slice  *hot;
   58         void            *softc;
   59         g_slice_start_t *start;
   60 };
   61 
   62 g_dumpconf_t g_slice_dumpconf;
   63 int g_slice_config(struct g_geom *gp, u_int idx, int how, off_t offset, off_t length, u_int sectorsize, const char *fmt, ...);
   64 #define G_SLICE_CONFIG_CHECK    0
   65 #define G_SLICE_CONFIG_SET      1
   66 #define G_SLICE_CONFIG_FORCE    2
   67 struct g_geom * g_slice_new(struct g_class *mp, u_int slices, struct g_provider *pp, struct g_consumer **cpp, void *extrap, int extra, g_slice_start_t *start);
   68 
   69 int g_slice_conf_hot(struct g_geom *gp, u_int idx, off_t offset, off_t length);
   70 void g_slice_finish_hot(struct bio *bp);
   71 
   72 #endif /* _GEOM_GEOM_SLICE_H_ */

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