/* $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_ */
