FCPBK Back to Index page
 
Prolog 
Control Block Contents 
   FCPBK 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.


  FCPBK Prolog Top of page
  
 NAME       : HCPFCPBK
 DESCRIPTION: EXPLORE FCP Device Block
 DSECT      : FCPBK
 FUNCTION   : This block contains information on an FCP device
              and related WWPNs used by the EXPLORE FCP
              command.
 LOCATED BY : HCPIODFP
 CREATED BY : HCPEXPET
 DELETED BY : HCPEXPET
 RELOCATION CONSIDERATIONS : None
 NOTES      : FCPBKs are obtained by EXPLORE FCP ADD
              FCPBKs are released by EXPLORE FCP REMOVE
 
 
  FCPBK Control Block Content Top of page
  




 FCPBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      FCPBK          EXPLORE FCP Device Block
0000    0 Signed       4 FCPFPNT        Next FCPBK used by EXPLORE
0008    8 Dbl-Word     8 FCPLOCK (3)    Not currently used
0020   32 Signed       4 FCPRDEV        Pointer to HLA of RDEV
0024   36 Bitstring    1 FCPFLAG        FCP Flag byte
          1... ....      FCPNWWPN       X'80' FCPNWWPN FCP was added
                                        without WWPN
          .1.. ....      FCPACTIV       X'40' FCPACTIV Bit for active
                                        state
0025   37 Bitstring    1 *              Reserved for IBM use
0026   38 Bitstring    2 FCPDEV         FCP Device number
0028   40 Address      4 FCPWFWRD       Address of the first WWPN chain
                                        entry
002C   44 Address      4 FCPCOMM        Address of FCPBK common area
0030   48 Address      4 FCPAIRES       Address to continue after AI
0034   52 Address      4 *              Reserved for future IBM use
0038   56 Signed       4 FCPSAVE        Save area for after AI
          0000003C       FCPBYSZ        *-FCPBK FCPBK size in bytes
          00000008       FCPDSIZE       ((*-FCPBK)+7)/8 FCPBK size in
                                        double-words
 
 
  FCPBK Storage Layout Top of page
  
          
*** FCPBK - EXPLORE FCP Device Block
*
*     +---------------------------+---------------------------+
*   0 |         FCPFPNT           |///////////////////////////|
*     +---------------------------+---------------------------+
*   8 |                                                       |
*     =                       FCPLOCK                         =
*     |                                                       |
*     +---------------------------+------+------+-------------+
*  20 |         FCPRDEV           |:FLAG |//////|   FCPDEV    |
*     +---------------------------+------+------+-------------+
*  28 |         FCPWFWRD          |         FCPCOMM           |
*     +---------------------------+---------------------------+
*  30 |         FCPAIRES          |///////////////////////////|
*     +---------------------------+---------------------------+
*  38 |         FCPSAVE           | 3C
*     +---------------------------+
*
*** FCPBK - EXPLORE FCP Device Block
 
 
  FCPBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
FCPACTIV       0024 40
FCPAIRES       0030
FCPBYSZ        0038 0000003C
FCPCOMM        002C
FCPDEV         0026
FCPDSIZE       0038 00000008
FCPFLAG        0024
FCPFPNT        0000
FCPLOCK        0008
FCPNWWPN       0024 80
FCPRDEV        0020
FCPSAVE        0038
FCPWFWRD       0028
 
This information is based on z/VM 7.4.0 Last updated on 24 Jun 2024 at 11:30:51 EDT.
Copyright IBM Corporation, 1990, 2024