SSCBK Back to Index page
 
Prolog 
Control Block Contents 
   SSCBK 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.


  SSCBK Prolog Top of page
 
 NAME       : HCPSSCBK
 DESCRIPTION: SYSTEM SERVICE CONTROL BLOCK
 DSECT      : SSCBK
 FUNCTION   : THIS CONTROL BLOCK PROVIDES AN ANCHOR AND A
              REPOSITORY FOR INFORMATION REQUIRED BY THE TSAF-RELATED
              SYSTEM SERVICES, *IDENT AND *CRM.
 LOCATED BY : SYSSSCBK FIELD OF SYSCM
 CREATED BY : HCPIUAIN
 DELETED BY : NONE
 SERIALIZED : THERE IS NO GENERAL LOCKING STRUCTURE OVER THIS
              BLOCK, BUT THERE ARE SEVERAL FIELDS WHICH ARE MODIFIED
              VIA COMPARE AND SWAP IN ORDER TO ENSURE THEIR INTEGRITY:
              SSCHIPTH AND SSCTGCNT.
              ALSO, THE HASH TABLE PLISTS CONTAINED HEREIN ARE LOCKED
              BY HCPGAL.  SEE HCPGAL FOR MORE INFORMATION.
 RELOCATION CONSIDERATIONS : None
 NOTES      : THIS COPY FILE REQUIRES THE FOLLOWING IN ORDER
              TO GENERATE PROPERLY:
              - HCPGALPL
 
 
  SSCBK Control Block Content Top of page
 

 SSCBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure SSCBK SYSTEM SERVICE CONTROL BLOCK 0000 0 Signed 4 SSCHIPTH HIGH WATER MARK FOR *IDENT PATHS, UPDATED VIA "CS" INSTR, IT IS USED FOR DUMPING TABLE TO TSAF 0004 4 Signed 2 SSCINST Resource instance number 0006 6 Signed 2 SSCTSFPT PATH ID TO TSAF VIRTUAL MACHINE 0008 8 Character 8 SSCTSFVM USERID OF TSAF VIRTUAL MACHINE 0010 16 Signed 4 SSCTGCNT TOTAL COUNT OF GLOBALLY REGISTERED NAMES 0014 20 Signed 4 SSCFLAG FLAGS (TSTB/RSTB MAY BE USED) 1... .... SSCTRQ X'80' SSCTRQ TRQBK FOR VMDBK SCAN IS SCHEDULED 0018 24 Bitstring 1 SSCTFEAT FEATURES OF TSAF VIRTUAL MACHINE 1... .... SSCGTWYS X'80' SSCGTWYS GATEWAY LUS MANAGED .1.. .... SSCDDSRV X'40' SSCDDSRV DISTRIBUTED DIRECTORY SERVICES 0019 25 Bitstring 1 * (3) RESERVED FOR IBM USE 001C 28 Signed 4 * RESERVED FOR IBM USE 0020 32 Dbl-Word 8 SSCSRTLK (3) LOCK ON RESOURCE TBL (SRTBKS) 0038 56 Signed 4 * (6) RESERVED FOR IBM USE The length of the SSCGTWHT field for DATAMAP is 776 0050 80 Character 784 SSCGTWHT HASH TABLE OF GATEWAYS The length of the SSCGRSHT field for DATAMAP is 776 0360 864 Character 784 SSCGRSHT HASH TABLE OF SYSTEM AND GLOBAL RESOURCES The length of the SSCLRSHT field for DATAMAP is 776 0670 1648 Character 784 SSCLRSHT HASH TABLE OF LOCAL RESOURCES The length of the SSCPTHHT field for DATAMAP is 776 0980 2432 Character 784 SSCPTHHT HASH TABLE OF PATH ENTRIES FOR HANDLING SEVER FROM *IDENT MISCELLANEOUS SSCBK EQUATES 000001F4 SSCMXGBL 500 MAX NUMBER OF NAMES THAT CAN BE REGISTERED WITH TSAF 000001F4 SSCMXGTW SSCMXGBL MAX NUMBER OF GATEWAYS 000001F4 SSCMXGRS SSCMXGBL MAX NUMBER OF GLOBAL RESOURCES NOTES : THE MAXIMUM NUMBER OF CF RESOURCES IS ALSO 65535, BUT T TABLE MAXIMUM IS ALREADY INCREASED DUE TO SYSTEM RESOURCES. 0000FFFF SSCMXCFG 65535 MAX NUMBER OF CF GATEWAYS 0000FFFF SSCMXSRS 65535 MAX NUMBER OF SYSTEM RESOURCES 0000FFFF SSCMXLRS 65535 MAX NUMBER OF LOCAL RESOURCES 000000A4 SSCISGTW (SSCMXCFG/400)+1 GATEWAY TABLE INDEX SIZE 000000A4 SSCISGRS (SSCMXSRS/400)+1 GLOBAL RESOURCE TBL INDEX SZ 000000A4 SSCISLRS (SSCMXLRS/400)+1 LOCAL RESOURCE TBL INDEX SZ 000000A4 SSCISPTH (65535/400)+1 PATHID TABLE INDEX SIZE 00000192 SSCSIZE (*-SSCBK+7)/8 SIZE OF SSCBK IN DOUBLEWORDS
 
 
  SSCBK Storage Layout Top of page
 
          
*** SSCBK - SYSTEM SERVICE CONTROL BLOCK
*
*     +---------------------------+-------------+-------------+
*   0 |         SSCHIPTH          |  SSCINST    |  SSCTSFPT   |
*     +---------------------------+-------------+-------------+
*   8 |                       SSCTSFVM                        |
*     +---------------------------+---------------------------+
*  10 |         SSCTGCNT          |         SSCFLAG           |
*     +------+--------------------+---------------------------+
*  18 |:TFEAT|////////////////////|///////////////////////////|
*     +------+--------------------+---------------------------+
*  20 |                                                       |
*     =                       SSCSRTLK                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  38 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  50 |                                                       |
*     =                       SSCGTWHT                        =
*     |                                                       |
*     +-------------------------------------------------------+
* 360 |                                                       |
*     =                       SSCGRSHT                        =
*     |                                                       |
*     +-------------------------------------------------------+
* 670 |                                                       |
*     =                       SSCLRSHT                        =
*     |                                                       |
*     +-------------------------------------------------------+
* 980 |                                                       |
*     =                       SSCPTHHT                        =
*     |                                                       |
*     +-------------------------------------------------------+
* C90
*
*** SSCBK - SYSTEM SERVICE CONTROL BLOCK
 
 
  SSCBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
SSCDDSRV       0018 40
SSCFLAG        0014
SSCGRSHT       0360
SSCGTWHT       0050
SSCGTWYS       0018 80
SSCHIPTH       0000
SSCINST        0004
SSCISGRS       0980 000000A4
SSCISGTW       0980 000000A4
SSCISLRS       0980 000000A4
SSCISPTH       0980 000000A4
SSCLRSHT       0670
SSCMXCFG       0980 0000FFFF
SSCMXGBL       0980 000001F4
SSCMXGRS       0980 000001F4
SSCMXGTW       0980 000001F4
SSCMXLRS       0980 0000FFFF
SSCMXSRS       0980 0000FFFF
SSCPTHHT       0980
SSCSIZE        0980 00000192
SSCSRTLK       0020
SSCTFEAT       0018
SSCTGCNT       0010
SSCTRQ         0014 80
SSCTSFPT       0006
SSCTSFVM       0008
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:56:24 EDT.
Copyright IBM Corporation, 1990, 2022