SECBK Back to Index page
 
Prolog 
Control Block Contents 
   SECBK 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.


  SECBK Prolog Top of page
 
 NAME       : HCPSECBK
 DESCRIPTION: An element of the SECONDARY USERIDS TABLE
 DSECT      : SECBK (for IDOFFSET) / SECBB (for LIKE declares)
 FUNCTION   :
              Used to map information for an element of the
              TABLE OF SECONDARY USERIDS. It is maintained
              by HCPSEC. This table is neccessary to improve
              the performance of HCPSEC.
 LOCATED BY : SYSSECQ, an anchor located in SYSCM
 CREATED BY : HCPSEC
 DELETED BY : HCPSEC
 RELOCATION CONSIDERATIONS : None
  otes-
              - The TABLE OF SECONDARY USERIDS is anchored in SYSCM.
              The lock for the table is SYSSECLK.
              - The definition for each field in an element of the
              TABLE OF SECONDARY USERIDS is:
              - SEC_NEXT = points to the next element, if there is no
              next element then it is zero.
              - SEC_SECONDARY_USERID = has a user-id that can be found
              in the VMDSECU of some user in the system.
              - SEC_NUMBER_OF_REQUESTORS = the number of users in the
              system whose VMDSECU is the same as
              the SEC_SECONDARY_USERID of this element.
              - The invariant for this table
              (TABLE_OF_SECONDARY_USERIDS) is:
              A user-id is in this table if and only if there is some
              user in the system whose VMDSECU field contains
              this user-id, and, the SEC_NUMBER_OF_REQUESTORS is the
              number of users in the system whose VMDSECU field
              contains this user-id.
 
 
  SECBK Control Block Content Top of page
 

 SECBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure SECBK An element of the SECONDARY USERIDS TABLE 0000 0 Address 4 SEC_NEXT Next SECBK address 0004 4 Character 8 SEC_SECONDARY_USERID Secondary userid 000C 12 Signed 4 SEC_NUMBER_OF_REQUESTORS Referring users 00000002 SECSIZE (*-SECBK+7)/8 SECBK size in doublewords
 
 
  SECBK Storage Layout Top of page
 
          
*** SECBK - An element of the SECONDARY USERIDS TABLE
*
*     +---------------------------+---------------------------+
*   0 |         SEC_NEXT          |  SEC_SECONDARY_USERID-    |
*     +---------------------------+---------------------------+
*   8 |          -(004)           | SEC_NUMBER_OF_REQUESTORS  |
*     +---------------------------+---------------------------+
*  10
*
*** SECBK - An element of the SECONDARY USERIDS TABLE
 
 
  SECBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
SEC_NEXT       0000
SEC_NUMBER_OF_REQUESTORS
               000C
SEC_SECONDARY_USERID
               0004
SECSIZE        000C 00000002
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:55:02 EDT.
Copyright IBM Corporation, 1990, 2022