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 V5R2.0.

    Last updated on 11 Dec 2005 at 21:04:29.

    Copyright IBM Corporation, 1990, 2005