1 /* $NetBSD: iostat.h,v 1.12 2019/05/22 08:47:02 hannken Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 2004, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _SYS_IOSTAT_H_ 34 #define _SYS_IOSTAT_H_ 35 36 /* 37 * Disk device structures. 38 */ 39 40 #include <sys/time.h> 41 #include <sys/queue.h> 42 43 #define IOSTATNAMELEN 16 44 45 /* types of drives we can have */ 46 #define IOSTAT_DISK 0 47 #define IOSTAT_TAPE 1 48 #define IOSTAT_NFS 2 49 50 /* The following structure is 64-bit alignment safe */ 51 struct io_sysctl { 52 char name[IOSTATNAMELEN]; 53 int32_t busy; 54 int32_t type; 55 u_int64_t xfer; 56 u_int64_t seek; 57 u_int64_t bytes; 58 u_int32_t attachtime_sec; 59 u_int32_t attachtime_usec; 60 u_int32_t timestamp_sec; 61 u_int32_t timestamp_usec; 62 u_int32_t time_sec; 63 u_int32_t time_usec; 64 /* New separate read/write stats */ 65 u_int64_t rxfer; 66 u_int64_t rbytes; 67 u_int64_t wxfer; 68 u_int64_t wbytes; 69 /* 70 * New queue stats 71 * accumulated wait time (iostat_wait .. iostat_busy) 72 * accumulated wait sum (wait time * count) 73 * accumulated busy sum (busy time * count) 74 */ 75 u_int32_t wait_sec; 76 u_int32_t wait_usec; 77 u_int32_t waitsum_sec; 78 u_int32_t waitsum_usec; 79 u_int32_t busysum_sec; 80 u_int32_t busysum_usec; 81 }; 82 83 /* 84 * Structure for keeping the in-kernel drive stats - these are linked 85 * together in drivelist. 86 */ 87 88 struct io_stats { 89 char io_name[IOSTATNAMELEN]; /* device name */ 90 void *io_parent; /* pointer to what we are attached to */ 91 int io_type; /* type of device the state belong to */ 92 int io_busy; /* busy counter */ 93 int io_wait; /* wait counter */ 94 u_int64_t io_rxfer; /* total number of read transfers */ 95 u_int64_t io_wxfer; /* total number of write transfers */ 96 u_int64_t io_seek; /* total independent seek operations */ 97 u_int64_t io_rbytes; /* total bytes read */ 98 u_int64_t io_wbytes; /* total bytes written */ 99 struct timeval io_attachtime; /* time disk was attached */ 100 struct timeval io_timestamp; /* timestamp of last unbusy */ 101 struct timeval io_busystamp; /* timestamp of last busy */ 102 struct timeval io_waitstamp; /* timestamp of last wait */ 103 struct timeval io_busysum; /* accumulated wait * time */ 104 struct timeval io_waitsum; /* accumulated busy * time */ 105 struct timeval io_busytime; /* accumlated time busy */ 106 struct timeval io_waittime; /* accumlated time waiting */ 107 TAILQ_ENTRY(io_stats) io_link; 108 }; 109 110 /* 111 * drivelist_head is defined here so that user-land has access to it. 112 */ 113 TAILQ_HEAD(iostatlist_head, io_stats); /* the iostatlist is a TAILQ */ 114 115 #ifdef _KERNEL 116 void iostat_init(void); 117 void iostat_wait(struct io_stats *); 118 void iostat_busy(struct io_stats *); 119 void iostat_unbusy(struct io_stats *, long, int); 120 bool iostat_isbusy(struct io_stats *); 121 struct io_stats *iostat_find(const char *); 122 struct io_stats *iostat_alloc(int32_t, void *, const char *); 123 void iostat_free(struct io_stats *); 124 void iostat_rename(struct io_stats *, const char *); 125 void iostat_seek(struct io_stats *); 126 #endif 127 128 #endif /* _SYS_IOSTAT_H_ */ 129