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/11.1/sys/geom/geom_disk.h 312405 2017-01-19 11:16:25Z mav $
   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 #define G_DISK_CLASS_NAME       "DISK"
   48 
   49 struct disk;
   50 
   51 typedef int     disk_open_t(struct disk *);
   52 typedef int     disk_close_t(struct disk *);
   53 typedef void    disk_strategy_t(struct bio *bp);
   54 typedef int     disk_getattr_t(struct bio *bp);
   55 typedef void    disk_gone_t(struct disk *);
   56 typedef int     disk_ioctl_t(struct disk *, u_long cmd, void *data,
   57                         int fflag, struct thread *td);
   58                 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
   59 
   60 struct g_geom;
   61 struct devstat;
   62 
   63 typedef enum {
   64         DISK_INIT_NONE,
   65         DISK_INIT_START,
   66         DISK_INIT_DONE
   67 } disk_init_level;
   68 
   69 struct disk {
   70         /* Fields which are private to geom_disk */
   71         struct g_geom           *d_geom;
   72         struct devstat          *d_devstat;
   73         int                     d_goneflag;
   74         int                     d_destroyed;
   75         disk_init_level         d_init_level;
   76 
   77         /* Shared fields */
   78         u_int                   d_flags;
   79         const char              *d_name;
   80         u_int                   d_unit;
   81         struct bio_queue_head   *d_queue;
   82         struct mtx              *d_lock;
   83 
   84         /* Disk methods  */
   85         disk_open_t             *d_open;
   86         disk_close_t            *d_close;
   87         disk_strategy_t         *d_strategy;
   88         disk_ioctl_t            *d_ioctl;
   89         dumper_t                *d_dump;
   90         disk_getattr_t          *d_getattr;
   91         disk_gone_t             *d_gone;
   92 
   93         /* Info fields from driver to geom_disk.c. Valid when open */
   94         u_int                   d_sectorsize;
   95         off_t                   d_mediasize;
   96         u_int                   d_fwsectors;
   97         u_int                   d_fwheads;
   98         u_int                   d_maxsize;
   99         off_t                   d_delmaxsize;
  100         u_int                   d_stripeoffset;
  101         u_int                   d_stripesize;
  102         char                    d_ident[DISK_IDENT_SIZE];
  103         char                    d_descr[DISK_IDENT_SIZE];
  104         uint16_t                d_hba_vendor;
  105         uint16_t                d_hba_device;
  106         uint16_t                d_hba_subvendor;
  107         uint16_t                d_hba_subdevice;
  108         uint16_t                d_rotation_rate;
  109 
  110         /* Fields private to the driver */
  111         void                    *d_drv1;
  112 };
  113 
  114 #define DISKFLAG_RESERVED       0x1     /* Was NEEDSGIANT */
  115 #define DISKFLAG_OPEN           0x2
  116 #define DISKFLAG_CANDELETE      0x4
  117 #define DISKFLAG_CANFLUSHCACHE  0x8
  118 #define DISKFLAG_UNMAPPED_BIO   0x10
  119 #define DISKFLAG_DIRECT_COMPLETION      0x20
  120 #define DISKFLAG_CANZONE        0x80
  121 
  122 #define DISK_RR_UNKNOWN         0
  123 #define DISK_RR_NON_ROTATING    1
  124 #define DISK_RR_MIN             0x0401
  125 #define DISK_RR_MAX             0xfffe
  126 
  127 struct disk *disk_alloc(void);
  128 void disk_create(struct disk *disk, int version);
  129 void disk_destroy(struct disk *disk);
  130 void disk_gone(struct disk *disk);
  131 void disk_attr_changed(struct disk *dp, const char *attr, int flag);
  132 void disk_media_changed(struct disk *dp, int flag);
  133 void disk_media_gone(struct disk *dp, int flag);
  134 int disk_resize(struct disk *dp, int flag);
  135 
  136 #define DISK_VERSION_00         0x58561059
  137 #define DISK_VERSION_01         0x5856105a
  138 #define DISK_VERSION_02         0x5856105b
  139 #define DISK_VERSION_03         0x5856105c
  140 #define DISK_VERSION_04         0x5856105d
  141 #define DISK_VERSION_05         0x5856105e
  142 #define DISK_VERSION            DISK_VERSION_05
  143 
  144 #endif /* _KERNEL */
  145 #endif /* _GEOM_GEOM_DISK_H_ */

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