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_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: releng/8.3/sys/geom/geom_slice.h 199583 2009-11-20 15:27:52Z jhb $
   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 struct g_slice_hot {
   49         off_t   offset;
   50         off_t   length;
   51         int     ract;
   52         int     dact;
   53         int     wact;
   54 };
   55 
   56 typedef int g_slice_start_t (struct bio *bp);
   57 
   58 struct g_slicer {
   59         u_int                   nslice;
   60         u_int                   nprovider;
   61         struct g_slice          *slices;
   62 
   63         u_int                   nhotspot;
   64         struct g_slice_hot      *hotspot;
   65 
   66         void                    *softc;
   67         g_slice_start_t         *start;
   68         g_event_t               *hot;
   69 };
   70 
   71 g_dumpconf_t g_slice_dumpconf;
   72 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, ...);
   73 void g_slice_spoiled(struct g_consumer *cp);
   74 void g_slice_orphan(struct g_consumer *cp);
   75 #define G_SLICE_CONFIG_CHECK    0
   76 #define G_SLICE_CONFIG_SET      1
   77 #define G_SLICE_CONFIG_FORCE    2
   78 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);
   79 
   80 int g_slice_conf_hot(struct g_geom *gp, u_int idx, off_t offset, off_t length, int ract, int dact, int wact);
   81 #define G_SLICE_HOT_ALLOW       1
   82 #define G_SLICE_HOT_DENY        2
   83 #define G_SLICE_HOT_START       4
   84 #define G_SLICE_HOT_CALL        8
   85 
   86 int g_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp);
   87 
   88 void g_slice_finish_hot(struct bio *bp);
   89 
   90 #endif /* _GEOM_GEOM_SLICE_H_ */

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