$GSDBK

Prolog  

Control Block Contents  
   $GSDBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

$GSDBK Prolog

 NAME       : LGRGSDBK
 DESCRIPTION: Relocation mapping for HCPGSDBK
 DSECT      : $GSDBK
 FUNCTION   : LGRGSDBK describes those fields of the GSDBK that
              will be migrated to the destination system during
              guest relocation.
 LOCATED BY : This is a mapping of the RDODATA area within the
              RDOBK during guest relocation.
 RELOCATION CONSIDERATIONS : This control block is used during live guest
              relocation.  It is used to relocate a control block
              defined in a corresponding HCP COPY file.  Any
              fields or bits defined in HCPGSDBK which are
              required on the destination system must be defined
              here, and code must be added to migrate the field
              or bit during a relocation.

$GSDBK Control Block Content

$GSDBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      $GSDBK         Relocation mapping for HCPGSDBK
          00000001       $GSD_VER       1 Mapping version number
0000    0 Signed       2 $GSD_HDRL      Header length (in bytes)
0002    2 Signed       2 $GSD_BITL      Length of mapped bits (in bytes)
0004    4 Signed       4 *              Reserved for future use
          00000008       $GSD_HDLN      *-$GSDBK Length of header (bytes)
      NOTES      : This mapping is not intended to be comprehensive,
            since for the most part the GSDBKs that will be
            relocated contain simple character strings. The
            decoding routine(s) on the destination system will
            be aware of the context for the incoming GSDBK, and
            will therefore be able to set flags and other data
            as required.
      Bit map: Contains the GSDBK flags that are subject to
               relocation. These bits are defined sequentially,
               regardless of how they are defined in HCPGSDBK.
               This yields a consistent mapping that ensures
               compatibility when a guest is relocated between
               systems at differing service levels.
               Names in the comments column indicate the control
               block byte which contains the flag. This name is
               subject to change if the flag definition changes.
         ====> NEVER change bits which already exist here.
         ====> NEVER change the order of bits in this section.
         ====> ALWAYS add new bits at the end of this section,
               together with new flag bytes as required.
      Special note concerning GSDFLAG:
               GSDFLAG is relocated as a byte field, not as
               individual bits. See the note in the prolog of
               HCPGSDBK for more details.
0008    8 Signed       2 $GSD_BITS (0)  Bit map area
0008    8 Bitstring    1 $GSD0
          1... ....      $GSDCFMDG      X'80' $GSDCFMDG GSDTYPE
          .1.. ....      $GSDCFMCP      X'40' $GSDCFMCP GSDTYPE
          ..1. ....      $GSDCFMTR      X'20' $GSDCFMTR GSDTYPE
          ...1 ....      $GSD2305       X'10' $GSD2305 GSDTYPE
          .... 1...      $GSDREIPL      X'08' $GSDREIPL GSDTYPE
          .... .1..      $GSDIPLOG      X'04' $GSDIPLOG GSDTYPE
          .... ..1.      $GSDLOGIP      X'02' $GSDLOGIP GSDTYPE
          .... ...1      $GSDIRECT      X'01' $GSDIRECT GSDTYPE
          00000001       $GSD_BLEN      *-$GSD_BITS Length of bit map
                                        area
      Data:    Contains all HCPGSDBK data that is subject to
               relocation, except for flag bits, which are
               handled separately.
               All fields are defined as XLnn to avoid alignment
               warnings and to pack the data efficiently.
         ====> NEVER change fields which already exist here.
         ====> NEVER change the order of fields in this section.
         ====> ALWAYS add new fields at the end of this section.
0009    9 Bitstring    1 $GSD_DATA (0)  Start of data map
0009    9 Bitstring    4 $GSDNEXT       -> RDO offset to next $GSDBK
000D   13 Bitstring    1 $GSDFLAG       GSDBK flags
000E   14 Bitstring    2 $GSDSCAN       Byte disp of next fld in GSDDATA
0010   16 Bitstring    2 $GSDDCNT       Length of GSDDATA in bytes
0012   18 Bitstring    4 $GSDDATA       -> RDO offset to variable data
          00000016       $GSD_LEN       *-$GSDBK Total length, in bytes
          00000003       $GSD_SZ        ($GSD_LEN+7)/8 Size in
                                        doublewords

$GSDBK Storage Layout

          
*** $GSDBK - Relocation mapping for HCPGSDBK
*
*     +-------------+-------------+---------------------------+
*   0 | $GSD_HDRL   | $GSD_BITL   |///////////////////////////|
*     +------+------+-------------+------+------+-------------+
*   8 |$GSD0 |         $GSDNEXT          |:DFLAG|  $GSDSCAN   |
*     +------+------+--------------------+------+-------------+
*  10 |  $GSDDCNT   |         $GSDDATA          | 16
*     +-------------+---------------------------+
*
*** $GSDBK - Relocation mapping for HCPGSDBK

$GSDBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
$GSD_BITL      0002
$GSD_BITS      0008
$GSD_BLEN      0008 00000001
$GSD_DATA      0009
$GSD_HDLN      0004 00000008
$GSD_HDRL      0000
$GSD_LEN       0012 00000016
$GSD_SZ        0012 00000003
$GSD_VER       0000 00000001
$GSDCFMCP      0008 40
$GSDCFMDG      0008 80
$GSDCFMTR      0008 20
$GSDDATA       0012
$GSDDCNT       0010
$GSDFLAG       000D
$GSDIPLOG      0008 04
$GSDIRECT      0008 01
$GSDLOGIP      0008 02
$GSDNEXT       0009
$GSDREIPL      0008 08
$GSDSCAN       000E
$GSD0          0008
$GSD2305       0008 10