root / lab4 / .minix-src / include / sys / tape.h @ 14
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| 1 | 13 | up20180614 | /* $NetBSD: tape.h,v 1.3 2005/12/26 18:41:36 perry Exp $ */
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| 2 | |||
| 3 | /*-
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| 4 | * Copyright (c) 2005 The NetBSD Foundation, Inc.
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to The NetBSD Foundation
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| 8 | * by Brett Lymn
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Neither the name of The NetBSD Foundation nor the names of its
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| 16 | * contributors may be used to endorse or promote products derived
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| 17 | * from this software without specific prior written permission.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 29 | * POSSIBILITY OF SUCH DAMAGE.
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| 30 | */
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| 31 | |||
| 32 | #ifndef _SYS_TAPE_H_
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| 33 | #define _SYS_TAPE_H_
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| 34 | |||
| 35 | #include <sys/queue.h> |
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| 36 | |||
| 37 | #define TAPENAMELEN 16 |
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| 38 | |||
| 39 | /* The following structure is 64-bit alignment safe */
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| 40 | struct tape_sysctl {
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| 41 | char name[TAPENAMELEN];
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| 42 | int32_t busy; |
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| 43 | int32_t pad; |
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| 44 | uint64_t xfer; |
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| 45 | uint64_t bytes; |
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| 46 | uint32_t attachtime_sec; |
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| 47 | uint32_t attachtime_usec; |
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| 48 | uint32_t timestamp_sec; |
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| 49 | uint32_t timestamp_usec; |
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| 50 | uint32_t time_sec; |
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| 51 | uint32_t time_usec; |
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| 52 | uint64_t rxfer; |
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| 53 | uint64_t rbytes; |
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| 54 | uint64_t wxfer; |
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| 55 | uint64_t wbytes; |
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| 56 | }; |
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| 57 | |||
| 58 | /*
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| 59 | * Statistics for the tape device - in a separate structure so userland can
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| 60 | * see them.
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| 61 | */
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| 62 | |||
| 63 | struct tape {
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| 64 | char *name; /* name of drive */ |
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| 65 | int busy; /* drive is busy */ |
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| 66 | uint64_t rxfer; /* total number of read transfers */
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| 67 | uint64_t wxfer; /* total number of write transfers */
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| 68 | uint64_t rbytes; /* total bytes read */
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| 69 | uint64_t wbytes; /* total bytes written */
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| 70 | struct timeval attachtime; /* time tape was attached */ |
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| 71 | struct timeval timestamp; /* timestamp of last unbusy */ |
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| 72 | struct timeval time; /* total time spent busy */ |
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| 73 | |||
| 74 | TAILQ_ENTRY(tape) link; |
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| 75 | }; |
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| 76 | |||
| 77 | /* Head of the tape stats list, define here so userland can get at it */
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| 78 | TAILQ_HEAD(tapelist_head, tape); /* the tapelist is a TAILQ */
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| 79 | |||
| 80 | #endif
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