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_disk.h

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    1 /*-
    2  * Copyright (c) 2003 Poul-Henning Kamp
    3  * All rights reserved.
    4  *
    5  * This software was developed for the FreeBSD Project by Poul-Henning Kamp
    6  * and NAI Labs, the Security Research Division of Network Associates, Inc.
    7  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
    8  * DARPA CHATS research program.
    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. The names of the authors may not be used to endorse or promote
   19  *    products derived from this software without specific prior written
   20  *    permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  * $FreeBSD: releng/8.3/sys/geom/geom_disk.h 199583 2009-11-20 15:27:52Z jhb $
   35  */
   36 
   37 #ifndef _GEOM_GEOM_DISK_H_
   38 #define _GEOM_GEOM_DISK_H_
   39 
   40 #ifdef _KERNEL 
   41 
   42 #include <sys/queue.h>
   43 #include <sys/_lock.h>
   44 #include <sys/_mutex.h>
   45 #include <sys/disk.h>
   46 
   47 struct disk;
   48 
   49 typedef int     disk_open_t(struct disk *);
   50 typedef int     disk_close_t(struct disk *);
   51 typedef void    disk_strategy_t(struct bio *bp);
   52 typedef int     disk_ioctl_t(struct disk *, u_long cmd, void *data,
   53                         int fflag, struct thread *td);
   54                 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
   55 
   56 struct g_geom;
   57 struct devstat;
   58 
   59 struct disk {
   60         /* Fields which are private to geom_disk */
   61         struct g_geom           *d_geom;
   62         struct devstat          *d_devstat;
   63         int                     d_destroyed;
   64 
   65         /* Shared fields */
   66         u_int                   d_flags;
   67         const char              *d_name;
   68         u_int                   d_unit;
   69         struct bio_queue_head   *d_queue;
   70         struct mtx              *d_lock;
   71 
   72         /* Disk methods  */
   73         disk_open_t             *d_open;
   74         disk_close_t            *d_close;
   75         disk_strategy_t         *d_strategy;
   76         disk_ioctl_t            *d_ioctl;
   77         dumper_t                *d_dump;
   78 
   79         /* Info fields from driver to geom_disk.c. Valid when open */
   80         u_int                   d_sectorsize;
   81         off_t                   d_mediasize;
   82         u_int                   d_fwsectors;
   83         u_int                   d_fwheads;
   84         u_int                   d_maxsize;
   85         u_int                   d_stripeoffset;
   86         u_int                   d_stripesize;
   87         char                    d_ident[DISK_IDENT_SIZE];
   88 
   89         /* Fields private to the driver */
   90         void                    *d_drv1;
   91 };
   92 
   93 #define DISKFLAG_NEEDSGIANT     0x1
   94 #define DISKFLAG_OPEN           0x2
   95 #define DISKFLAG_CANDELETE      0x4
   96 #define DISKFLAG_CANFLUSHCACHE  0x8
   97 
   98 struct disk *disk_alloc(void);
   99 void disk_create(struct disk *disk, int version);
  100 void disk_destroy(struct disk *disk);
  101 void disk_gone(struct disk *disk);
  102 
  103 #define DISK_VERSION_00         0x58561059
  104 #define DISK_VERSION_01         0x5856105a
  105 #define DISK_VERSION            DISK_VERSION_01
  106 
  107 #endif /* _KERNEL */
  108 #endif /* _GEOM_GEOM_DISK_H_ */

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