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

     /*-
      * Copyright (c) 2003 Poul-Henning Kamp
      * All rights reserved.
      *
      * This software was developed for the FreeBSD Project by Poul-Henning Kamp
      * and NAI Labs, the Security Research Division of Network Associates, Inc.
      * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
      * DARPA CHATS research program.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. The names of the authors may not be used to endorse or promote
     *    products derived from this software without specific prior written
     *    permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD: releng/9.1/sys/geom/geom_disk.h 239707 2012-08-26 05:11:52Z imp $
     */
    
    #ifndef _GEOM_GEOM_DISK_H_
    #define _GEOM_GEOM_DISK_H_
    
    #ifdef _KERNEL 
    
    #include <sys/queue.h>
    #include <sys/_lock.h>
    #include <sys/_mutex.h>
    #include <sys/disk.h>
    
    struct disk;
    
    typedef int     disk_open_t(struct disk *);
    typedef int     disk_close_t(struct disk *);
    typedef void    disk_strategy_t(struct bio *bp);
    typedef int     disk_getattr_t(struct bio *bp);
    typedef void    disk_gone_t(struct disk *);
    typedef int     disk_ioctl_t(struct disk *, u_long cmd, void *data,
                            int fflag, struct thread *td);
                    /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
    
    struct g_geom;
    struct devstat;
    
    struct disk {
            /* Fields which are private to geom_disk */
            struct g_geom           *d_geom;
            struct devstat          *d_devstat;
            int                     d_destroyed;
    
            /* Shared fields */
            u_int                   d_flags;
            const char              *d_name;
            u_int                   d_unit;
            struct bio_queue_head   *d_queue;
            struct mtx              *d_lock;
    
            /* Disk methods  */
            disk_open_t             *d_open;
            disk_close_t            *d_close;
            disk_strategy_t         *d_strategy;
            disk_ioctl_t            *d_ioctl;
            dumper_t                *d_dump;
            disk_getattr_t          *d_getattr;
    
            /* Info fields from driver to geom_disk.c. Valid when open */
            u_int                   d_sectorsize;
            off_t                   d_mediasize;
            u_int                   d_fwsectors;
            u_int                   d_fwheads;
            u_int                   d_maxsize;
            u_int                   d_stripeoffset;
            u_int                   d_stripesize;
            char                    d_ident[DISK_IDENT_SIZE];
            char                    d_descr[DISK_IDENT_SIZE];
            uint16_t                d_hba_vendor;
            uint16_t                d_hba_device;
            uint16_t                d_hba_subvendor;
            uint16_t                d_hba_subdevice;
    
            /* Fields private to the driver */
            void                    *d_drv1;
    
           /* new fields in stable - don't use if DISKFLAG_LACKS_GONE is set */
           disk_gone_t             *d_gone;
   };
   
   #define DISKFLAG_NEEDSGIANT     0x1
   #define DISKFLAG_OPEN           0x2
   #define DISKFLAG_CANDELETE      0x4
   #define DISKFLAG_CANFLUSHCACHE  0x8
   #define DISKFLAG_LACKS_GONE     0x10
   
   struct disk *disk_alloc(void);
   void disk_create(struct disk *disk, int version);
   void disk_destroy(struct disk *disk);
   void disk_gone(struct disk *disk);
   void disk_attr_changed(struct disk *dp, const char *attr, int flag);
   
   #define DISK_VERSION_00         0x58561059
   #define DISK_VERSION_01         0x5856105a
   #define DISK_VERSION_02         0x5856105b
   #define DISK_VERSION            DISK_VERSION_02
   
   #endif /* _KERNEL */
   #endif /* _GEOM_GEOM_DISK_H_ */

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