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  * $FreeBSD$
   35  */
   36 
   37 #ifndef _GEOM_GEOM_DISK_H_
   38 #define _GEOM_GEOM_DISK_H_
   39 
   40 #define DISK_RR_UNKNOWN         0
   41 #define DISK_RR_NON_ROTATING    1
   42 #define DISK_RR_MIN             0x0401
   43 #define DISK_RR_MAX             0xfffe
   44 
   45 #ifdef _KERNEL 
   46 
   47 #include <sys/queue.h>
   48 #include <sys/_lock.h>
   49 #include <sys/_mutex.h>
   50 #include <sys/disk.h>
   51 
   52 #define G_DISK_CLASS_NAME       "DISK"
   53 
   54 struct disk;
   55 
   56 typedef int     disk_open_t(struct disk *);
   57 typedef int     disk_close_t(struct disk *);
   58 typedef void    disk_strategy_t(struct bio *bp);
   59 typedef int     disk_getattr_t(struct bio *bp);
   60 typedef void    disk_gone_t(struct disk *);
   61 typedef int     disk_ioctl_t(struct disk *, u_long cmd, void *data,
   62                         int fflag, struct thread *td);
   63                 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
   64 
   65 struct g_geom;
   66 struct devstat;
   67 
   68 typedef enum {
   69         DISK_INIT_NONE,
   70         DISK_INIT_START,
   71         DISK_INIT_DONE
   72 } disk_init_level;
   73 
   74 struct disk {
   75         /* Fields which are private to geom_disk */
   76         struct g_geom           *d_geom;
   77         struct devstat          *d_devstat;
   78         int                     d_goneflag;
   79         int                     d_destroyed;
   80         disk_init_level         d_init_level;
   81 
   82         /* Shared fields */
   83         u_int                   d_flags;
   84         const char              *d_name;
   85         u_int                   d_unit;
   86         struct bio_queue_head   *d_queue;
   87         struct mtx              *d_lock;
   88 
   89         /* Disk methods  */
   90         disk_open_t             *d_open;
   91         disk_close_t            *d_close;
   92         disk_strategy_t         *d_strategy;
   93         disk_ioctl_t            *d_ioctl;
   94         dumper_t                *d_dump;
   95         disk_getattr_t          *d_getattr;
   96         disk_gone_t             *d_gone;
   97 
   98         /* Info fields from driver to geom_disk.c. Valid when open */
   99         u_int                   d_sectorsize;
  100         off_t                   d_mediasize;
  101         u_int                   d_fwsectors;
  102         u_int                   d_fwheads;
  103         u_int                   d_maxsize;
  104         off_t                   d_delmaxsize;
  105         u_int                   d_stripeoffset;
  106         u_int                   d_stripesize;
  107         char                    d_ident[DISK_IDENT_SIZE];
  108         char                    d_descr[DISK_IDENT_SIZE];
  109         uint16_t                d_hba_vendor;
  110         uint16_t                d_hba_device;
  111         uint16_t                d_hba_subvendor;
  112         uint16_t                d_hba_subdevice;
  113         uint16_t                d_rotation_rate;
  114 
  115         /* Fields private to the driver */
  116         void                    *d_drv1;
  117 };
  118 
  119 #define DISKFLAG_RESERVED               0x0001  /* Was NEEDSGIANT */
  120 #define DISKFLAG_OPEN                   0x0002
  121 #define DISKFLAG_CANDELETE              0x0004
  122 #define DISKFLAG_CANFLUSHCACHE          0x0008
  123 #define DISKFLAG_UNMAPPED_BIO           0x0010
  124 #define DISKFLAG_DIRECT_COMPLETION      0x0020
  125 #define DISKFLAG_CANZONE                0x0080
  126 #define DISKFLAG_WRITE_PROTECT          0x0100
  127 
  128 struct disk *disk_alloc(void);
  129 void disk_create(struct disk *disk, int version);
  130 void disk_destroy(struct disk *disk);
  131 void disk_gone(struct disk *disk);
  132 void disk_attr_changed(struct disk *dp, const char *attr, int flag);
  133 void disk_media_changed(struct disk *dp, int flag);
  134 void disk_media_gone(struct disk *dp, int flag);
  135 int disk_resize(struct disk *dp, int flag);
  136 
  137 #define DISK_VERSION_00         0x58561059
  138 #define DISK_VERSION_01         0x5856105a
  139 #define DISK_VERSION_02         0x5856105b
  140 #define DISK_VERSION_03         0x5856105c
  141 #define DISK_VERSION_04         0x5856105d
  142 #define DISK_VERSION_05         0x5856105e
  143 #define DISK_VERSION            DISK_VERSION_05
  144 
  145 #endif /* _KERNEL */
  146 #endif /* _GEOM_GEOM_DISK_H_ */

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

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