sys/sys/devicestat.h

   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: src/sys/sys/devicestat.h,v 1.9 1999/12/29 04:24:39 peter Exp $
  29  * $DragonFly: src/sys/sys/devicestat.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
  30  */
  31
  32 #ifndef _DEVICESTAT_H
  33 #define _DEVICESTAT_H
  34
  35 #include <sys/queue.h>
  36 #include <sys/time.h>
  37
  38 #define DEVSTAT_NAME_LEN  16
  39
  40 /*
  41  * ATTENTION:  The devstat version below should be incremented any time a
  42  * change is made in struct devstat, or any time a change is made in the
  43  * enumerated types that struct devstat uses.  (Only if those changes
  44  * would require a recompile -- i.e. re-arranging the order of an
  45  * enumerated type or something like that.)  This version number is used by
  46  * userland utilities to determine whether or not they are in sync with the
  47  * kernel.
  48  */
  49 #define DEVSTAT_VERSION    4
  50
  51 /*
  52  * These flags specify which statistics features are supported or not
  53  * supported by a particular device.  The default is all statistics are
  54  * supported.
  55  */
  56 typedef enum {
  57         DEVSTAT_ALL_SUPPORTED   = 0x00,
  58         DEVSTAT_NO_BLOCKSIZE    = 0x01,
  59         DEVSTAT_NO_ORDERED_TAGS = 0x02,
  60         DEVSTAT_BS_UNAVAILABLE  = 0x04
  61 } devstat_support_flags;
  62
  63 typedef enum {
  64         DEVSTAT_NO_DATA = 0x00,
  65         DEVSTAT_READ    = 0x01,
  66         DEVSTAT_WRITE   = 0x02,
  67         DEVSTAT_FREE    = 0x03
  68 } devstat_trans_flags;
  69
  70 typedef enum {
  71         DEVSTAT_TAG_SIMPLE      = 0x00,
  72         DEVSTAT_TAG_HEAD        = 0x01,
  73         DEVSTAT_TAG_ORDERED     = 0x02,
  74         DEVSTAT_TAG_NONE        = 0x03
  75 } devstat_tag_type;
  76
  77 typedef enum {
  78         DEVSTAT_PRIORITY_MIN    = 0x000,
  79         DEVSTAT_PRIORITY_OTHER  = 0x020,
  80         DEVSTAT_PRIORITY_PASS   = 0x030,
  81         DEVSTAT_PRIORITY_FD     = 0x040,
  82         DEVSTAT_PRIORITY_WFD    = 0x050,
  83         DEVSTAT_PRIORITY_TAPE   = 0x060,
  84         DEVSTAT_PRIORITY_CD     = 0x090,
  85         DEVSTAT_PRIORITY_DISK   = 0x110,
  86         DEVSTAT_PRIORITY_ARRAY  = 0x120,
  87         DEVSTAT_PRIORITY_MAX    = 0xfff
  88 } devstat_priority;
  89
  90 /*
  91  * These types are intended to aid statistics gathering/display programs.
  92  * The first 13 types (up to the 'target' flag) are identical numerically
  93  * to the SCSI device type numbers.  The next 3 types designate the device
  94  * interface.  Currently the choices are IDE, SCSI, and 'other'.  The last
  95  * flag specifies whether or not the given device is a passthrough device
  96  * or not.  If it is a passthrough device, the lower 4 bits specify which
  97  * type of physical device lies under the passthrough device, and the next
  98  * 4 bits specify the interface.
  99  */
 100 typedef enum {
 101         DEVSTAT_TYPE_DIRECT     = 0x000,
 102         DEVSTAT_TYPE_SEQUENTIAL = 0x001,
 103         DEVSTAT_TYPE_PRINTER    = 0x002,
 104         DEVSTAT_TYPE_PROCESSOR  = 0x003,
 105         DEVSTAT_TYPE_WORM       = 0x004,
 106         DEVSTAT_TYPE_CDROM      = 0x005,
 107         DEVSTAT_TYPE_SCANNER    = 0x006,
 108         DEVSTAT_TYPE_OPTICAL    = 0x007,
 109         DEVSTAT_TYPE_CHANGER    = 0x008,
 110         DEVSTAT_TYPE_COMM       = 0x009,
 111         DEVSTAT_TYPE_ASC0       = 0x00a,
 112         DEVSTAT_TYPE_ASC1       = 0x00b,
 113         DEVSTAT_TYPE_STORARRAY  = 0x00c,
 114         DEVSTAT_TYPE_ENCLOSURE  = 0x00d,
 115         DEVSTAT_TYPE_FLOPPY     = 0x00e,
 116         DEVSTAT_TYPE_MASK       = 0x00f,
 117         DEVSTAT_TYPE_IF_SCSI    = 0x010,
 118         DEVSTAT_TYPE_IF_IDE     = 0x020,
 119         DEVSTAT_TYPE_IF_OTHER   = 0x030,
 120         DEVSTAT_TYPE_IF_MASK    = 0x0f0,
 121         DEVSTAT_TYPE_PASS       = 0x100
 122 } devstat_type_flags;
 123
 124 struct devstat {
 125         STAILQ_ENTRY(devstat)   dev_links;
 126         u_int32_t               device_number;       /*
 127                                                       * Devstat device
 128                                                       * number.
 129                                                       */
 130         char                    device_name[DEVSTAT_NAME_LEN];
 131         int                     unit_number;
 132         u_int64_t               bytes_read;          /*
 133                                                       * Total bytes read
 134                                                       * from a device.
 135                                                       */
 136         u_int64_t               bytes_written;       /*
 137                                                       * Total bytes written
 138                                                       * to a device.
 139                                                       */
 140         u_int64_t               bytes_freed;         /*
 141                                                       * Total bytes freed
 142                                                       * from a device.
 143                                                       */
 144         u_int64_t               num_reads;           /*
 145                                                       * Total number of
 146                                                       * read requests to
 147                                                       * the device.
 148                                                       */
 149         u_int64_t               num_writes;          /*
 150                                                       * Total number of
 151                                                       * write requests to
 152                                                       * the device.
 153                                                       */
 154         u_int64_t               num_frees;           /*
 155                                                       * Total number of
 156                                                       * free requests to
 157                                                       * the device.
 158                                                       */
 159         u_int64_t               num_other;           /*
 160                                                       * Total number of
 161                                                       * transactions that
 162                                                       * don't read or write
 163                                                       * data.
 164                                                       */
 165         int32_t                 busy_count;          /*
 166                                                       * Total number of
 167                                                       * transactions
 168                                                       * outstanding for
 169                                                       * the device.
 170                                                       */
 171         u_int32_t               block_size;          /* Block size, bytes */
 172         u_int64_t               tag_types[3];        /*
 173                                                       * The number of
 174                                                       * simple, ordered,
 175                                                       * and head of queue
 176                                                       * tags sent.
 177                                                       */
 178         struct timeval          dev_creation_time;   /*
 179                                                       * Time the device was
 180                                                       * created.
 181                                                       */
 182         struct timeval          busy_time;           /*
 183                                                       * Total amount of
 184                                                       * time drive has spent
 185                                                       * processing requests.
 186                                                       */
 187         struct timeval          start_time;          /*
 188                                                       * The time when
 189                                                       * busy_count was
 190                                                       * last == 0.  Or, the
 191                                                       * start of the latest
 192                                                       * busy period.
 193                                                       */
 194         struct timeval          last_comp_time;      /*
 195                                                       * Last time a
 196                                                       * transaction was
 197                                                       * completed.
 198                                                       */
 199
 200         devstat_support_flags   flags;               /*
 201                                                       * Which statistics
 202                                                       * are supported by a
 203                                                       * given device.
 204                                                       */
 205         devstat_type_flags      device_type;         /* Device type */
 206         devstat_priority        priority;            /* Controls list pos. */
 207 };
 208
 209 #ifdef _KERNEL
 210 struct buf;
 211 void devstat_add_entry(struct devstat *ds, const char *dev_name,
 212                        int unit_number, u_int32_t block_size,
 213                        devstat_support_flags flags,
 214                        devstat_type_flags device_type,
 215                        devstat_priority priority);
 216 void devstat_remove_entry(struct devstat *ds);
 217 void devstat_start_transaction(struct devstat *ds);
 218 void devstat_end_transaction(struct devstat *ds, u_int32_t bytes,
 219                              devstat_tag_type tag_type,
 220                              devstat_trans_flags flags);
 221 void devstat_end_transaction_buf(struct devstat *ds, struct buf *);
 222 #endif
 223
 224 #endif /* _DEVICESTAT_H */