The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/disk.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $OpenBSD: disk.h,v 1.37 2022/09/11 19:34:40 miod Exp $  */
    2 /*      $NetBSD: disk.h,v 1.11 1996/04/28 20:22:50 thorpej Exp $        */
    3 
    4 /*
    5  * Copyright (c) 1995 Jason R. Thorpe.  All rights reserved.
    6  * Copyright (c) 1992, 1993
    7  *      The Regents of the University of California.  All rights reserved.
    8  *
    9  * This software was developed by the Computer Systems Engineering group
   10  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   11  * contributed to Berkeley.
   12  *
   13  * All advertising materials mentioning features or use of this software
   14  * must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Lawrence Berkeley Laboratory.
   17  *
   18  * Redistribution and use in source and binary forms, with or without
   19  * modification, are permitted provided that the following conditions
   20  * are met:
   21  * 1. Redistributions of source code must retain the above copyright
   22  *    notice, this list of conditions and the following disclaimer.
   23  * 2. Redistributions in binary form must reproduce the above copyright
   24  *    notice, this list of conditions and the following disclaimer in the
   25  *    documentation and/or other materials provided with the distribution.
   26  * 3. Neither the name of the University nor the names of its contributors
   27  *    may be used to endorse or promote products derived from this software
   28  *    without specific prior written permission.
   29  *
   30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   40  * SUCH DAMAGE.
   41  *
   42  * from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp  (LBL)
   43  *
   44  *      @(#)disk.h      8.1 (Berkeley) 6/2/93
   45  */
   46 
   47 /*
   48  * Disk device structures.
   49  */
   50 
   51 #include <sys/device.h>
   52 #include <sys/time.h>
   53 #include <sys/queue.h>
   54 #include <sys/rwlock.h>
   55 #include <sys/mutex.h>
   56 
   57 struct buf;
   58 struct disklabel;
   59 
   60 #define DS_DISKNAMELEN  16
   61 
   62 struct diskstats {
   63         char            ds_name[DS_DISKNAMELEN];
   64         int             ds_busy;        /* busy counter */
   65         u_int64_t       ds_rxfer;       /* total number of read transfers */
   66         u_int64_t       ds_wxfer;       /* total number of write transfers */
   67         u_int64_t       ds_seek;        /* total independent seek operations */
   68         u_int64_t       ds_rbytes;      /* total bytes read */
   69         u_int64_t       ds_wbytes;      /* total bytes written */
   70         struct timeval  ds_attachtime;  /* time disk was attached */
   71         struct timeval  ds_timestamp;   /* time of first busy or any unbusy */
   72         struct timeval  ds_time;        /* total time spent busy */
   73 };
   74 
   75 struct disk {
   76         TAILQ_ENTRY(disk) dk_link;      /* link in global disklist */
   77         struct rwlock   dk_lock;        /* disk lock */
   78         struct mutex    dk_mtx;         /* busy/unbusy mtx */
   79         char            *dk_name;       /* disk name */
   80         struct device   *dk_device;     /* disk device structure. */
   81         dev_t           dk_devno;       /* disk device number. */
   82         int             dk_flags;       /* disk flags */
   83 #define DKF_CONSTRUCTED 0x0001
   84 #define DKF_OPENED      0x0002
   85 #define DKF_NOLABELREAD 0x0004
   86 
   87         /*
   88          * Metrics data; note that some metrics may have no meaning
   89          * on certain types of disks.
   90          */
   91         int             dk_busy;        /* busy counter */
   92         u_int64_t       dk_rxfer;       /* total number of read transfers */
   93         u_int64_t       dk_wxfer;       /* total number of write transfers */
   94         u_int64_t       dk_seek;        /* total independent seek operations */
   95         u_int64_t       dk_rbytes;      /* total bytes read */
   96         u_int64_t       dk_wbytes;      /* total bytes written */
   97         struct timeval  dk_attachtime;  /* time disk was attached */
   98         struct timeval  dk_timestamp;   /* time of first busy or any unbusy */
   99         struct timeval  dk_time;        /* total time spent busy */
  100 
  101         int             dk_bopenmask;   /* block devices open */
  102         int             dk_copenmask;   /* character devices open */
  103         int             dk_openmask;    /* composite (bopen|copen) */
  104         int             dk_state;       /* label state   ### */
  105         int             dk_blkshift;    /* shift to convert DEV_BSIZE to blks*/
  106         int             dk_byteshift;   /* shift to convert bytes to blks */
  107 
  108         /*
  109          * Disk label information.  Storage for the in-core disk label
  110          * must be dynamically allocated, otherwise the size of this
  111          * structure becomes machine-dependent.
  112          */
  113         struct disklabel *dk_label;
  114 };
  115 
  116 /* states */
  117 #define DK_CLOSED       0               /* drive is closed */
  118 #define DK_WANTOPEN     1               /* drive being opened */
  119 #define DK_WANTOPENRAW  2               /* drive being opened */
  120 #define DK_RDLABEL      3               /* label being read */
  121 #define DK_OPEN         4               /* label read, drive open */
  122 #define DK_OPENRAW      5               /* open without label */
  123 
  124 /* Disk map flags. */
  125 #define DM_OPENPART     0x1             /* Open raw partition. */
  126 #define DM_OPENBLCK     0x2             /* Open block device. */
  127 
  128 /*
  129  * disklist_head is defined here so that user-land has access to it.
  130  */
  131 TAILQ_HEAD(disklist_head, disk);        /* the disklist is a TAILQ */
  132 
  133 #ifdef _KERNEL
  134 extern  struct disklist_head disklist;  /* list of disks attached to system */
  135 extern  int disk_count;                 /* number of disks in global disklist */
  136 extern  int disk_change;                /* disk attached/detached */
  137 
  138 void    disk_init(void);
  139 int     disk_construct(struct disk *);
  140 void    disk_attach(struct device *, struct disk *);
  141 void    disk_detach(struct disk *);
  142 int     disk_openpart(struct disk *, int, int, int);
  143 void    disk_closepart(struct disk *, int, int);
  144 void    disk_gone(int (*)(dev_t, int, int, struct proc *), int);
  145 void    disk_busy(struct disk *);
  146 void    disk_unbusy(struct disk *, long, daddr_t, int);
  147 
  148 int     disk_lock(struct disk *);
  149 void    disk_lock_nointr(struct disk *);
  150 void    disk_unlock(struct disk *);
  151 struct device *disk_lookup(struct cfdriver *, int);
  152 
  153 char    *disk_readlabel(struct disklabel *, dev_t, char *, size_t);
  154 
  155 int     disk_map(char *, char *, int, int);
  156 
  157 int     duid_iszero(u_char *);
  158 const char *duid_format(u_char *);
  159 #endif

Cache object: e9caae14cc94e241eb08ac0a34243f8a


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.