geom_disk.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2003 Poul-Henning Kamp
    5  * All rights reserved.
    6  *
    7  * This software was developed for the FreeBSD Project by Poul-Henning Kamp
    8  * and NAI Labs, the Security Research Division of Network Associates, Inc.
    9  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
   10  * DARPA CHATS research program.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. The names of the authors may not be used to endorse or promote
   21  *    products derived from this software without specific prior written
   22  *    permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  * $FreeBSD$
   37  */
   38 
   39 #ifndef _GEOM_GEOM_DISK_H_
   40 #define _GEOM_GEOM_DISK_H_
   41 
   42 #define DISK_RR_UNKNOWN         0
   43 #define DISK_RR_NON_ROTATING    1
   44 #define DISK_RR_MIN             0x0401
   45 #define DISK_RR_MAX             0xfffe
   46 
   47 #ifdef _KERNEL 
   48 
   49 #include <sys/queue.h>
   50 #include <sys/_lock.h>
   51 #include <sys/_mutex.h>
   52 #include <sys/disk.h>
   53 
   54 #define G_DISK_CLASS_NAME       "DISK"
   55 
   56 struct disk;
   57 
   58 typedef int     disk_open_t(struct disk *);
   59 typedef int     disk_close_t(struct disk *);
   60 typedef void    disk_strategy_t(struct bio *bp);
   61 typedef int     disk_getattr_t(struct bio *bp);
   62 typedef void    disk_gone_t(struct disk *);
   63 typedef int     disk_ioctl_t(struct disk *, u_long cmd, void *data,
   64                         int fflag, struct thread *td);
   65                 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
   66 
   67 struct g_geom;
   68 struct devstat;
   69 
   70 typedef enum {
   71         DISK_INIT_NONE,
   72         DISK_INIT_START,
   73         DISK_INIT_DONE
   74 } disk_init_level;
   75 
   76 struct disk_alias {
   77         LIST_ENTRY(disk_alias)  da_next;
   78         const char              *da_alias;
   79 };
   80 
   81 struct disk {
   82         /* Fields which are private to geom_disk */
   83         struct g_geom           *d_geom;
   84         struct devstat          *d_devstat;
   85         int                     d_goneflag;
   86         int                     d_destroyed;
   87         disk_init_level         d_init_level;
   88 
   89         /* Shared fields */
   90         u_int                   d_flags;
   91         const char              *d_name;
   92         u_int                   d_unit;
   93         struct bio_queue_head   *d_queue;
   94         struct mtx              *d_lock;
   95 
   96         /* Disk methods  */
   97         disk_open_t             *d_open;
   98         disk_close_t            *d_close;
   99         disk_strategy_t         *d_strategy;
  100         disk_ioctl_t            *d_ioctl;
  101         dumper_t                *d_dump;
  102         disk_getattr_t          *d_getattr;
  103         disk_gone_t             *d_gone;
  104 
  105         /* Info fields from driver to geom_disk.c. Valid when open */
  106         u_int                   d_sectorsize;
  107         off_t                   d_mediasize;
  108         u_int                   d_fwsectors;
  109         u_int                   d_fwheads;
  110         u_int                   d_maxsize;
  111         off_t                   d_delmaxsize;
  112         u_int                   d_stripeoffset;
  113         u_int                   d_stripesize;
  114         char                    d_ident[DISK_IDENT_SIZE];
  115         char                    d_descr[DISK_IDENT_SIZE];
  116         uint16_t                d_hba_vendor;
  117         uint16_t                d_hba_device;
  118         uint16_t                d_hba_subvendor;
  119         uint16_t                d_hba_subdevice;
  120         uint16_t                d_rotation_rate;
  121 
  122         /* Fields private to the driver */
  123         void                    *d_drv1;
  124 
  125         /* Fields private to geom_disk, to be moved on next version bump */
  126         LIST_HEAD(,disk_alias)  d_aliases;
  127 };
  128 
  129 #define DISKFLAG_RESERVED               0x0001  /* Was NEEDSGIANT */
  130 #define DISKFLAG_OPEN                   0x0002
  131 #define DISKFLAG_CANDELETE              0x0004
  132 #define DISKFLAG_CANFLUSHCACHE          0x0008
  133 #define DISKFLAG_UNMAPPED_BIO           0x0010
  134 #define DISKFLAG_DIRECT_COMPLETION      0x0020
  135 #define DISKFLAG_CANZONE                0x0080
  136 #define DISKFLAG_WRITE_PROTECT          0x0100
  137 
  138 struct disk *disk_alloc(void);
  139 void disk_create(struct disk *disk, int version);
  140 void disk_destroy(struct disk *disk);
  141 void disk_gone(struct disk *disk);
  142 void disk_attr_changed(struct disk *dp, const char *attr, int flag);
  143 void disk_media_changed(struct disk *dp, int flag);
  144 void disk_media_gone(struct disk *dp, int flag);
  145 int disk_resize(struct disk *dp, int flag);
  146 void disk_add_alias(struct disk *disk, const char *);
  147 
  148 #define DISK_VERSION_00         0x58561059
  149 #define DISK_VERSION_01         0x5856105a
  150 #define DISK_VERSION_02         0x5856105b
  151 #define DISK_VERSION_03         0x5856105c
  152 #define DISK_VERSION_04         0x5856105d
  153 #define DISK_VERSION_05         0x5856105e
  154 #define DISK_VERSION            DISK_VERSION_05
  155 
  156 #endif /* _KERNEL */
  157 #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