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

MRIODSTC

Prolog
Control Block Contents
Storage Layout
Cross Reference

MRIODSTC Prolog

 DSECT NAME - IODSTC
 FUNCTION - Map a Monitor record.
 LOCATED BY -
      Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
      MRRECHDR    Monitor Record Header
 NAME - MRIODSTC
 DESCRIPTIVE NAME - Monitor Event Record
                  Domain  6 - I/O Domain
                  Record 20 - State Change
 DESCRIPTION - Indicates that a real device has generated a state
             change.


MRIODSTC Control Block Contents

Offsets
Dec Hex  Type       Len  Name (Dim)         Description
 
  0   0  Structure   64  IODSTC              Start of monitor record
  0   0  Character    0  IODSTC_MRHDR        Record header. See MRRECHDR for
                                             details.
  0   0  Character   20  MRHDR               
  0   0  Unsigned     2  MRHDRLEN            record length in bytes
  2   2  Unsigned     2  MRHDRZER            field of zeros
  4   4  Unsigned     1  MRHDRDM             domain identifier
  5   5  Unsigned     1  *                   
  6   6  Unsigned     2  MRHDRRC             record identifier
  8   8  Character    8  MRHDRTOD            Time at which this record was
                                             built. In time-of-day (TOD) clock
                                             format. See IBM System 370 XA
                                             Principle of Operation for
                                             explanation of format.
 16  10  Character    4  *                   
 20  14  Character    0  MRHDR_END           End of header
 20  14  Unsigned     1  IODSTC_CALCODE      State change type code Result of
                                             PSF order X'1F' - manage alias
 21  15  Bitstring    1  *                   Reserved and available for IBM
                                             use
 22  16  Unsigned     2  *                   Reserved and available for IBM
                                             use
 24  18  Bitstring    1  IODSTC_RDEVTYPE     Device type code. Unique for
                                             each device within the class in
                                             IODSTC_RDEVCLAS.
 25  19  Bitstring    1  IODSTC_RDEVCLAS     Device class code. Unique for
                                             each class.
 26  1A  Unsigned     2  IODSTC_RDEVDVID     Device type number in packed
                                             decimal. See IODSTC_RDEVDVIV for
                                             its source.
 28  1C  Bitstring    1  IODSTC_CALMODLN     Device model identifier. See
                                             IODSTC_RDEVDVIV flag for its
                                             source.
 29  1D  Bitstring    1  IODSTC_RDEVLPM      Logical path mask
 30  1E  Unsigned     2  IODSTC_RDEVDEV      Device number in packed decimal
 32  20  Unsigned     4  IODSTC_RDEVSID      Host subchannel id
 36  24  Character    8  IODSTC_RDEVCHPS     Eight channel path ids for this
                                             device
 44  2C  Unsigned     2  IODSTC_RDEVCUID     control unit id in packed
                                             decimal. Applicable only when
                                             IODSTC_RDEVCUIV = on.
 46  2E  Unsigned     1  IODSTC_RDEVCUMN     Control unit model identifier.
                                             Applicable only when
                                             IODSTC_RDEVCUIV = on.
 47  2F  Bitstring    1  IODSTC_CALFLAGS     Flag Byte
          1... ....      IODSTC_RDEVDVIV     OFF = device model number (in
                                             IODSTC_RDEVDVID) and model
                                             identifier (in IODSTC_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.. ....      IODSTC_RDEVCUIV     When on, Control unit
                                             information is supplied in
                                             IODSTC_RDEVCUID and
                                             IODSTC_RDEVCUMN.
          ..1. ....      *                   
          ...1 ....      *                   
          .... 1...      *                   
          .... .1..      *                   
          .... ..1.      *                   
          .... ...1      *                   
 48  30  Character    6  IODSTC_RDEVSER      DASD volume serial identifier
 54  36  Unsigned     2  *                   Reserved and available for IBM
                                             use
 56  38  Unsigned     4  IODSTC_CALRDEVSID   Host subchannel id for the new
                                             base
 60  3C  Unsigned     2  IODSTC_CALRDEVDEV   Device number for the new base
                                             in packed decimal
 62  3E  Bitstring    1  IODSTC_RDEVPVFG     PAV flag to indicate base and
                                             alias DASD
          1... ....      IODSTC_RDEVPVBA     PAV base indicator
          .1.. ....      IODSTC_RDEVPVAL     PAV alias indicator
          ..1. ....      *                   
          ...1 ....      *                   
          .... 1...      *                   
          .... .1..      *                   
          .... ..1.      *                   
          .... ...1      *                   
 63  3F  Bitstring    1  *                   Reserved and available for IBM
                                             use
 64  40  Character    0  IODSTC_END          

MRIODSTC Cross Reference

                      Hex           Hex
Name                 Offset Length Value
 
IODSTC                  0     64
IODSTC_CALCODE         14      1
IODSTC_CALFLAGS        2F      1
IODSTC_CALMODLN        1C      1
IODSTC_CALRDEVDEV      3C      2
IODSTC_CALRDEVSID      38      4
IODSTC_END             40      0
IODSTC_MRHDR            0      0
IODSTC_RDEVCHPS        24      8
IODSTC_RDEVCLAS        19      1
IODSTC_RDEVCUID        2C      2
IODSTC_RDEVCUIV        2F           40
IODSTC_RDEVCUMN        2E      1
IODSTC_RDEVDEV         1E      2
IODSTC_RDEVDVID        1A      2
IODSTC_RDEVDVIV        2F           80
IODSTC_RDEVLPM         1D      1
IODSTC_RDEVPVAL        3E           40
IODSTC_RDEVPVBA        3E           80
IODSTC_RDEVPVFG        3E      1
IODSTC_RDEVSER         30      6
IODSTC_RDEVSID         20      4
IODSTC_RDEVTYPE        18      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 V4R2.0.
Last updated on 15 Oct 2001 at 08:04:23.
Copyright IBM Corporation, 1990, 2001