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/sys/tape.h

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    1 /*      $NetBSD: tape.h,v 1.3 2005/12/26 18:41:36 perry Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 2005 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Brett Lymn
    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. Neither the name of The NetBSD Foundation nor the names of its
   16  *    contributors may be used to endorse or promote products derived
   17  *    from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #ifndef _SYS_TAPE_H_
   33 #define _SYS_TAPE_H_
   34 
   35 #include <sys/queue.h>
   36 
   37 #define TAPENAMELEN     16
   38 
   39 /* The following structure is 64-bit alignment safe */
   40 struct tape_sysctl {
   41         char            name[TAPENAMELEN];
   42         int32_t         busy;
   43         int32_t         pad;
   44         uint64_t        xfer;
   45         uint64_t        bytes;
   46         uint32_t        attachtime_sec;
   47         uint32_t        attachtime_usec;
   48         uint32_t        timestamp_sec;
   49         uint32_t        timestamp_usec;
   50         uint32_t        time_sec;
   51         uint32_t        time_usec;
   52         uint64_t        rxfer;
   53         uint64_t        rbytes;
   54         uint64_t        wxfer;
   55         uint64_t        wbytes;
   56 };
   57 
   58 /*
   59  * Statistics for the tape device - in a separate structure so userland can
   60  * see them.
   61  */
   62 
   63 struct tape {
   64         char            *name;          /* name of drive */
   65         int             busy;           /* drive is busy */
   66         uint64_t       rxfer;           /* total number of read transfers */
   67         uint64_t       wxfer;           /* total number of write transfers */
   68         uint64_t       rbytes;          /* total bytes read */
   69         uint64_t       wbytes;          /* total bytes written */
   70         struct timeval  attachtime;     /* time tape was attached */
   71         struct timeval  timestamp;      /* timestamp of last unbusy */
   72         struct timeval  time;           /* total time spent busy */
   73 
   74         TAILQ_ENTRY(tape) link;
   75 };
   76 
   77 /* Head of the tape stats list, define here so userland can get at it */
   78 TAILQ_HEAD(tapelist_head, tape);        /* the tapelist is a TAILQ */
   79 
   80 #endif
   81 

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