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/* $NetBSD: iostat.h,v 1.12 2019/05/22 08:47:02 hannken Exp $ */
/*-
* Copyright (c) 1996, 1997, 2004, 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifndef _SYS_IOSTAT_H_
#define _SYS_IOSTAT_H_
/*
* Disk device structures.
*/
#include <sys/time.h>
#include <sys/queue.h>
#define IOSTATNAMELEN 16
/* types of drives we can have */
#define IOSTAT_DISK 0
#define IOSTAT_TAPE 1
#define IOSTAT_NFS 2
/* The following structure is 64-bit alignment safe */
struct io_sysctl {
char name[IOSTATNAMELEN];
int32_t busy;
int32_t type;
u_int64_t xfer;
u_int64_t seek;
u_int64_t bytes;
u_int32_t attachtime_sec;
u_int32_t attachtime_usec;
u_int32_t timestamp_sec;
u_int32_t timestamp_usec;
u_int32_t time_sec;
u_int32_t time_usec;
/* New separate read/write stats */
u_int64_t rxfer;
u_int64_t rbytes;
u_int64_t wxfer;
u_int64_t wbytes;
/*
* New queue stats
* accumulated wait time (iostat_wait .. iostat_busy)
* accumulated wait sum (wait time * count)
* accumulated busy sum (busy time * count)
*/
u_int32_t wait_sec;
u_int32_t wait_usec;
u_int32_t waitsum_sec;
u_int32_t waitsum_usec;
u_int32_t busysum_sec;
u_int32_t busysum_usec;
};
/*
* Structure for keeping the in-kernel drive stats - these are linked
* together in drivelist.
*/
struct io_stats {
char io_name[IOSTATNAMELEN]; /* device name */
void *io_parent; /* pointer to what we are attached to */
int io_type; /* type of device the state belong to */
int io_busy; /* busy counter */
int io_wait; /* wait counter */
u_int64_t io_rxfer; /* total number of read transfers */
u_int64_t io_wxfer; /* total number of write transfers */
u_int64_t io_seek; /* total independent seek operations */
u_int64_t io_rbytes; /* total bytes read */
u_int64_t io_wbytes; /* total bytes written */
struct timeval io_attachtime; /* time disk was attached */
struct timeval io_timestamp; /* timestamp of last unbusy */
struct timeval io_busystamp; /* timestamp of last busy */
struct timeval io_waitstamp; /* timestamp of last wait */
struct timeval io_busysum; /* accumulated wait * time */
struct timeval io_waitsum; /* accumulated busy * time */
struct timeval io_busytime; /* accumlated time busy */
struct timeval io_waittime; /* accumlated time waiting */
TAILQ_ENTRY(io_stats) io_link;
};
/*
* drivelist_head is defined here so that user-land has access to it.
*/
TAILQ_HEAD(iostatlist_head, io_stats); /* the iostatlist is a TAILQ */
#ifdef _KERNEL
void iostat_init(void);
void iostat_wait(struct io_stats *);
void iostat_busy(struct io_stats *);
void iostat_unbusy(struct io_stats *, long, int);
bool iostat_isbusy(struct io_stats *);
struct io_stats *iostat_find(const char *);
struct io_stats *iostat_alloc(int32_t, void *, const char *);
void iostat_free(struct io_stats *);
void iostat_rename(struct io_stats *, const char *);
void iostat_seek(struct io_stats *);
#endif
#endif /* _SYS_IOSTAT_H_ */
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