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 7.3.0 Last updated on 22 Jun 2022 at 15:50:26 EDT.
Copyright IBM Corporation, 1990, 2022