$BKIBK Back to Index page
 
Prolog 
Control Block Contents 
   $BKIBK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  $BKIBK Prolog Top of page
 
 NAME       : LGRBKIBK
 DESCRIPTION: Relocation mapping for HCPBKIBK
 DSECT      : $BKIBK
 FUNCTION   : LGRBKIBK describes those fields of the BKIBK 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.
 CREATED BY : HCPRLWBF - BKIBK Formatter for LGR
 DELETED BY : HCPRLDRL - Release storage associated with a RDP
 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 HCPBKIBK 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.
 
 
  $BKIBK Control Block Content Top of page
 

 $BKIBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure $BKIBK Relocation mapping for HCPBKIBK 00000001 $BKI_VER 1 Mapping version number for this DSECT. Version is independent of the CP level and need only be changed when this DSECT is changed. The convention is to increment by 1. 0000 0 Signed 2 $BKI_HDRL Header length (in bytes) 0002 2 Signed 2 $BKI_BITL Length of mapped bits (in bytes) 0004 4 Signed 4 * Reserved for future use 00000008 $BKI_HDLN *-$BKIBK Length of header (bytes) Bit map: Contains the BKIBK flags that are subject to relocation. These bits are defined sequentially, regardless of how they are defined in HCPBKIBK. 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. 0008 8 Signed 2 $BKI_BITS (0) Bit map area 0008 8 Bitstring 1 $BKI0 1... .... $BKIDEVRD X'80' $BKIDEVRD BKIFLAGS 00000001 $BKI_BLEN *-$BKI_BITS Length of bit map area Data: Contains all HCPBKIBK 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. together with new flag bytes as required. 0009 9 Bitstring 1 $BKI_DATA (0) Start of data map 0009 9 Bitstring 4 $BKIBLKSZ Block size of user's disk 000D 13 Bitstring 2 $BKIVDEVN Virtual device number 000F 15 Bitstring 8 $BKIOFFCP CP offset for disk 0017 23 Bitstring 8 $BKIOFFST User's requested offset 001F 31 Bitstring 8 $BKISTART User's starting block 0027 39 Bitstring 8 $BKIEND User's ending block 0000002F $BKI_LEN *-$BKIBK Length of mapping block 00000006 $BKI_SZ ($BKI_LEN+7)/8 Size of mapping block
 
 
  $BKIBK Storage Layout Top of page
 
          
*** $BKIBK - Relocation mapping for HCPBKIBK
*
*     +-------------+-------------+---------------------------+
*   0 | $BKI_HDRL   | $BKI_BITL   |///////////////////////////|
*     +------+------+-------------+------+-------------+------+
*   8 |$BKI0 |        $BKIBLKSZ          | $BKIVDEVN   |(00F)-|
*     +------+---------------------------+-------------+------+
*  10 |                  -$BKIOFFCP                    |(017)-|
*     +------------------------------------------------+------+
*  18 |                  -$BKIOFFST                    |(01F)-|
*     +------------------------------------------------+------+
*  20 |                  -$BKISTART                    |(027)-|
*     +------------------------------------------------+------+
*  28 |                   -$BKIEND                     | 2F
*     +------------------------------------------------+
*
*** $BKIBK - Relocation mapping for HCPBKIBK
 
 
  $BKIBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
$BKI_BITL      0002
$BKI_BITS      0008
$BKI_BLEN      0008 00000001
$BKI_DATA      0009
$BKI_HDLN      0004 00000008
$BKI_HDRL      0000
$BKI_LEN       0027 0000002F
$BKI_SZ        0027 00000006
$BKI_VER       0000 00000001
$BKIBLKSZ      0009
$BKIDEVRD      0008 80
$BKIEND        0027
$BKIOFFCP      000F
$BKIOFFST      0017
$BKISTART      001F
$BKIVDEVN      000D
$BKI0          0008
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:58:32 EDT.
Copyright IBM Corporation, 1990, 2022