1/*- 2 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31#ifndef _DEVICESTAT_H 32#define _DEVICESTAT_H 33 34#include <sys/queue.h> 35#include <sys/time.h> 36 37/* 38 * XXX: Should really be SPECNAMELEN 39 */ 40#define DEVSTAT_NAME_LEN 16 41 42/* 43 * device name for the mmap device 44 */ 45#define DEVSTAT_DEVICE_NAME "devstat" 46 47/* 48 * ATTENTION: The devstat version below should be incremented any time a 49 * change is made in struct devstat, or any time a change is made in the 50 * enumerated types that struct devstat uses. (Only if those changes 51 * would require a recompile -- i.e. re-arranging the order of an 52 * enumerated type or something like that.) This version number is used by 53 * userland utilities to determine whether or not they are in sync with the 54 * kernel. 55 */ 56#define DEVSTAT_VERSION 6 57 58/* 59 * These flags specify which statistics features are supported or not 60 * supported by a particular device. The default is all statistics are 61 * supported. 62 */ 63typedef enum { 64 DEVSTAT_ALL_SUPPORTED = 0x00, 65 DEVSTAT_NO_BLOCKSIZE = 0x01, 66 DEVSTAT_NO_ORDERED_TAGS = 0x02, 67 DEVSTAT_BS_UNAVAILABLE = 0x04 68} devstat_support_flags; 69 70typedef enum { 71 DEVSTAT_NO_DATA = 0x00, 72 DEVSTAT_READ = 0x01, 73 DEVSTAT_WRITE = 0x02, 74 DEVSTAT_FREE = 0x03 75} devstat_trans_flags; 76#define DEVSTAT_N_TRANS_FLAGS 4 77 78typedef enum { 79 DEVSTAT_TAG_SIMPLE = 0x00, 80 DEVSTAT_TAG_HEAD = 0x01, 81 DEVSTAT_TAG_ORDERED = 0x02, 82 DEVSTAT_TAG_NONE = 0x03 83} devstat_tag_type; 84 85typedef enum { 86 DEVSTAT_PRIORITY_MIN = 0x000, 87 DEVSTAT_PRIORITY_OTHER = 0x020, 88 DEVSTAT_PRIORITY_PASS = 0x030, 89 DEVSTAT_PRIORITY_FD = 0x040, 90 DEVSTAT_PRIORITY_WFD = 0x050, 91 DEVSTAT_PRIORITY_TAPE = 0x060, 92 DEVSTAT_PRIORITY_CD = 0x090, 93 DEVSTAT_PRIORITY_DISK = 0x110, 94 DEVSTAT_PRIORITY_ARRAY = 0x120, 95 DEVSTAT_PRIORITY_MAX = 0xfff 96} devstat_priority; 97 98/* 99 * These types are intended to aid statistics gathering/display programs. 100 * The first 13 types (up to the 'target' flag) are identical numerically 101 * to the SCSI device type numbers. The next 3 types designate the device 102 * interface. Currently the choices are IDE, SCSI, and 'other'. The last 103 * flag specifies whether or not the given device is a passthrough device 104 * or not. If it is a passthrough device, the lower 4 bits specify which 105 * type of physical device lies under the passthrough device, and the next 106 * 4 bits specify the interface. 107 */ 108typedef enum { 109 DEVSTAT_TYPE_DIRECT = 0x000, 110 DEVSTAT_TYPE_SEQUENTIAL = 0x001, 111 DEVSTAT_TYPE_PRINTER = 0x002, 112 DEVSTAT_TYPE_PROCESSOR = 0x003, 113 DEVSTAT_TYPE_WORM = 0x004, 114 DEVSTAT_TYPE_CDROM = 0x005, 115 DEVSTAT_TYPE_SCANNER = 0x006, 116 DEVSTAT_TYPE_OPTICAL = 0x007, 117 DEVSTAT_TYPE_CHANGER = 0x008, 118 DEVSTAT_TYPE_COMM = 0x009, 119 DEVSTAT_TYPE_ASC0 = 0x00a, 120 DEVSTAT_TYPE_ASC1 = 0x00b, 121 DEVSTAT_TYPE_STORARRAY = 0x00c, 122 DEVSTAT_TYPE_ENCLOSURE = 0x00d, 123 DEVSTAT_TYPE_FLOPPY = 0x00e, 124 DEVSTAT_TYPE_MASK = 0x00f, 125 DEVSTAT_TYPE_IF_SCSI = 0x010, 126 DEVSTAT_TYPE_IF_IDE = 0x020, 127 DEVSTAT_TYPE_IF_OTHER = 0x030, 128 DEVSTAT_TYPE_IF_MASK = 0x0f0, 129 DEVSTAT_TYPE_PASS = 0x100 130} devstat_type_flags; 131 132/* 133 * XXX: Next revision should add 134 * off_t offset[DEVSTAT_N_TRANS_FLAGS]; 135 * XXX: which should contain the offset of the last completed transfer. 136 */ 137struct devstat { 138 /* Internal house-keeping fields */ 139 u_int sequence0; /* Update sequence# */ 140 int allocated; /* Allocated entry */ 141 u_int start_count; /* started ops */ 142 u_int end_count; /* completed ops */ 143 struct bintime busy_from; /* 144 * busy time unaccounted 145 * for since this time 146 */ 147 STAILQ_ENTRY(devstat) dev_links; 148 u_int32_t device_number; /* 149 * Devstat device 150 * number. 151 */ 152 char device_name[DEVSTAT_NAME_LEN]; 153 int unit_number; 154 u_int64_t bytes[DEVSTAT_N_TRANS_FLAGS]; 155 u_int64_t operations[DEVSTAT_N_TRANS_FLAGS]; 156 struct bintime duration[DEVSTAT_N_TRANS_FLAGS]; 157 struct bintime busy_time; 158 struct bintime creation_time; /* 159 * Time the device was 160 * created. 161 */ 162 u_int32_t block_size; /* Block size, bytes */ 163 u_int64_t tag_types[3]; /* 164 * The number of 165 * simple, ordered, 166 * and head of queue 167 * tags sent. 168 */ 169 devstat_support_flags flags; /* 170 * Which statistics 171 * are supported by a 172 * given device. 173 */ 174 devstat_type_flags device_type; /* Device type */ 175 devstat_priority priority; /* Controls list pos. */ 176 const void *id; /* 177 * Identification for 178 * GEOM nodes 179 */ 180 u_int sequence1; /* Update sequence# */ 181}; 182 183STAILQ_HEAD(devstatlist, devstat); 184 185#ifdef _KERNEL 186struct bio; 187 188struct devstat *devstat_new_entry(const void *dev_name, int unit_number, 189 u_int32_t block_size, 190 devstat_support_flags flags, 191 devstat_type_flags device_type, 192 devstat_priority priority); 193 194void devstat_remove_entry(struct devstat *ds); 195void devstat_start_transaction(struct devstat *ds, struct bintime *now); 196void devstat_start_transaction_bio(struct devstat *ds, struct bio *bp); 197void devstat_end_transaction(struct devstat *ds, u_int32_t bytes, 198 devstat_tag_type tag_type, 199 devstat_trans_flags flags, 200 struct bintime *now, struct bintime *then); 201void devstat_end_transaction_bio(struct devstat *ds, struct bio *bp); 202void devstat_end_transaction_bio_bt(struct devstat *ds, struct bio *bp, 203 struct bintime *now); 204#endif 205 206#endif /* _DEVICESTAT_H */ 207