Programming Interface Information:
The Monitor Records are intended Programming Interfaces that
allow the customer to write programs to obtain services of z/VM.

MRIODSON

Prolog
Control Block Contents
Cross Reference

MRIODSON Prolog

 DSECT NAME - IODSON
 FUNCTION - Map a Monitor record.
 LOCATED BY -
        Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
        MRRECHDR    Monitor Record Header
 NAME - MRIODSON
 DESCRIPTIVE NAME - Monitor Event Record
                    Domain 6 - I/O Domain
                    Record 11- Vary On Subchannel
 DESCRIPTION - Indicates that a subchannel has been varied online

MRIODSON Control Block Contents

Offsets
Dec  Hex  Type        Len  Name (Dim)             Description
 
   0   0  Structure    44  IODSON                 Start of monitor record
   0   0  Character     0  IODSON_MRHDR           Record header. See MRRECHDR
                                                  for details.
   0   0  Character    20  MRHDR
   0   0  Unsigned      2  MRHDRLEN
   2   2  Unsigned      2  MRHDRZER
   4   4  Unsigned      1  MRHDRDM
   5   5  Unsigned      1  *
   6   6  Unsigned      2  MRHDRRC
   8   8  Character     8  MRHDRTOD
  16  10  Character     4  *
  20  14  Character     0  MRHDR_END
  20  14  Bitstring     1  IODSON_RDEVTYPE        Device type code. Unique
                                                  for each device within the
                                                  class in IODSON_RDEVCLAS.
  21  15  Bitstring     1  IODSON_RDEVCLAS        Device class code. Unique
                                                  for each class.
  22  16  Unsigned      2  IODSON_RDEVDVID        Device type. See
                                                  IODSON_RDEVDVIV for its
                                                  source.
  24  18  Bitstring     1  IODSON_CALMODLN        Device model identifier.
                                                  See IODSON_RDEVDVIV flag for
                                                  its source.
  25  19  Bitstring     1  IODSON_RDEVLPM         Logical path mask
  26  1A  Unsigned      2  IODSON_RDEVDEV         Device number
  28  1C  Unsigned      4  IODSON_RDEVSID         Host subchannel id
  32  20  Character     8  IODSON_RDEVCHPS        Eight channel path ids for
                                                  this device
  40  28  Unsigned      2  IODSON_RDEVCUID        control unit id. Applicable
                                                  only when IODSON_RDEVCUIV =
                                                  on.
  42  2A  Unsigned      1  IODSON_RDEVCUMN        Control unit model
                                                  identifier. Applicable only
                                                  when IODSON_RDEVCUIV = on.
  43  2B  Bitstring     1  IODSON_CALFLAGS        Flag Byte
          1... ....        IODSON_RDEVDVIV         OFF = device model number
                                                  (in IODSON_RDEVDVID) and
                                                  model identifier (in
                                                  IODSON_CALMODLN) were
                                                  provided by user through the
                                                  RDEVICE macro or device
                                                  sensing at IPL time. ON =
                                                  device type number and model
                                                  identifier were provided by
                                                  the device at device
                                                  initialization time.
          .1.. ....        IODSON_RDEVCUIV         When on, Control unit
                                                  information is supplied in
                                                  IODSON_RDEVCUID and
                                                  IODSON_RDEVCUMN.
          ..1. ....        *
          ...1 ....        *
          .... 1...        *
          .... .1..        *
          .... ..1.        *
          .... ...1        *
  44  2C  Character     0  IODSON_END

MRIODSON Cross Reference

                      Hex           Hex
Name                  Offset Length Value
 
IODSON                     0     44
IODSON_CALFLAGS           2B      1
IODSON_CALMODLN           18      1
IODSON_END                2C      0
IODSON_MRHDR               0      0
IODSON_RDEVCHPS           20      8
IODSON_RDEVCLAS           15      1
IODSON_RDEVCUID           28      2
IODSON_RDEVCUIV           2B           40
IODSON_RDEVCUMN           2A      1
IODSON_RDEVDEV            1A      2
IODSON_RDEVDVID           16      2
IODSON_RDEVDVIV           2B           80
IODSON_RDEVLPM            19      1
IODSON_RDEVSID            1C      4
IODSON_RDEVTYPE           14      1
MRHDR                      0     20
MRHDR_END                 14      0
MRHDRDM                    4      1
MRHDRLEN                   0      2
MRHDRRC                    6      2
MRHDRTOD                   8      8
MRHDRZER                   2      2

This information is
based on z/VM V7R3.0.

Last updated on 09 September 2022 at 14:28:05.

Copyright IBM Corporation, 1990, 2022