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 */
51struct 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
88struct 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 */
113TAILQ_HEAD(iostatlist_head, io_stats); /* the iostatlist is a TAILQ */
114
115#ifdef _KERNEL
116void iostat_init(void);
117void iostat_wait(struct io_stats *);
118void iostat_busy(struct io_stats *);
119void iostat_unbusy(struct io_stats *, long, int);
120bool iostat_isbusy(struct io_stats *);
121struct io_stats *iostat_find(const char *);
122struct io_stats *iostat_alloc(int32_t, void *, const char *);
123void iostat_free(struct io_stats *);
124void iostat_rename(struct io_stats *, const char *);
125void iostat_seek(struct io_stats *);
126#endif
127
128#endif /* _SYS_IOSTAT_H_ */
129