4d4057d8a2
. fsck driver parses /etc/fstab and invokes sub-fscks . further simplifies fs handling in rc
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/* $NetBSD: iostat.h,v 1.10 2009/04/04 07:30:09 ad Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 2004, 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_IOSTAT_H_
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#define _SYS_IOSTAT_H_
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/*
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* Disk device structures.
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*/
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#include <sys/time.h>
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#include <sys/queue.h>
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#define IOSTATNAMELEN 16
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/* types of drives we can have */
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#define IOSTAT_DISK 0
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#define IOSTAT_TAPE 1
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#define IOSTAT_NFS 2
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/* The following structure is 64-bit alignment safe */
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struct io_sysctl {
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char name[IOSTATNAMELEN];
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int32_t busy;
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int32_t type;
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u_int64_t xfer;
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u_int64_t seek;
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u_int64_t bytes;
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u_int32_t attachtime_sec;
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u_int32_t attachtime_usec;
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u_int32_t timestamp_sec;
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u_int32_t timestamp_usec;
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u_int32_t time_sec;
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u_int32_t time_usec;
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/* New separate read/write stats */
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u_int64_t rxfer;
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u_int64_t rbytes;
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u_int64_t wxfer;
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u_int64_t wbytes;
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};
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/*
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* Structure for keeping the in-kernel drive stats - these are linked
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* together in drivelist.
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*/
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struct io_stats {
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char io_name[IOSTATNAMELEN]; /* device name */
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void *io_parent; /* pointer to what we are attached to */
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int io_type; /* type of device the state belong to */
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int io_busy; /* busy counter */
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u_int64_t io_rxfer; /* total number of read transfers */
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u_int64_t io_wxfer; /* total number of write transfers */
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u_int64_t io_seek; /* total independent seek operations */
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u_int64_t io_rbytes; /* total bytes read */
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u_int64_t io_wbytes; /* total bytes written */
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struct timeval io_attachtime; /* time disk was attached */
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struct timeval io_timestamp; /* timestamp of last unbusy */
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struct timeval io_time; /* total time spent busy */
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TAILQ_ENTRY(io_stats) io_link;
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};
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/*
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* drivelist_head is defined here so that user-land has access to it.
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*/
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TAILQ_HEAD(iostatlist_head, io_stats); /* the iostatlist is a TAILQ */
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#ifdef _KERNEL
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void iostat_init(void);
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void iostat_busy(struct io_stats *);
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void iostat_unbusy(struct io_stats *, long, int);
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bool iostat_isbusy(struct io_stats *);
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struct io_stats *iostat_find(const char *);
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struct io_stats *iostat_alloc(int32_t, void *, const char *);
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void iostat_free(struct io_stats *);
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void iostat_seek(struct io_stats *);
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#endif
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#endif /* _SYS_IOSTAT_H_ */
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