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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
PDEBK
Control Block Contents
PDEBK DSECT
Cross Reference (Contains links to field and bit definitions)
PDEBK Prolog
NAME : HCPPDEBK DESCRIPTION: PATH DESCRIPTOR ENTRY DSECT : PDEBK FUNCTION : HOLDS INFORMATION ABOUT AN IUCV OR APPC/VM PATH. LOCATED BY : CCTPDSEG FIELD IN HCPCCTBK CREATED BY : HCPIUFGP FOR IUCV CONNECT AND APPCVM CONNECT DELETED BY : HCPIULSV FOR SEVER
PDEBK Control Block Content
PDEBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure PDEBK PATH DESCRIPTOR ENTRY 0000 0 Signed 2 PDEMSGCT CNT OF OUTSTANDING MSGS ON PATH 0002 2 Signed 2 PDETGPID TARGET PATH ID 0004 4 Address 4 PDETGCCT TARGET CCT ADDRESS 0008 8 Signed 4 PDETGLKA TARGET IUCV LOCKWORD POINTER 000C 12 Bitstring 1 PDEFLAGS STATUS 1... .... PDEVALID X'80' VALID PATH .1.. .... PDESEND X'40' SEND ALLOWED ON THIS PATH ..1. .... PDEPRTY X'20' MAY INITIATE PRIORITY MESSAGES ...1 .... PDEPRMD X'10' MAY PUT DATA IN PARMLIST .... 1... PDEPHELD X'08' Path held by first invoker PDEVALID, PDEPEND1, PDEPEND2, and PDESERVD ( PEND1 + PDEND2) are the main flags used to indicate the status of one half of a path. The main combination's that will occur are PDEPEND1 on - The side of the path that has issued a CONNECT PDEPEND2 on - The side of the path that will issue an ACCEPT PDEVALID on - This side of the path is fully established. PDEVALID + PDESEVRD on - Partner has severed their side. If see PDEPHELD + PDESEVRD on, indicates that a SEVER has occurred on a path where the original function that set PDEPHELD had to release the IUCV lock for a brief time PDEPHELD is set for two different reasons. First, when the IUCV or APPCVM code is making a a call to an ESM and has given up the Invoker's IUCV lock from IUCV CONNECT APPCVM CONNECT IUCV SEVER APPCVM SEVER Second, when IUCV ACCEPT is going for the partner's lock, PDEPHELD on protects the Acceptor's PDEBK. The purpose of PDEPHELD is to give the calling function control over the disposition of a PDEBK when PDEPHELD is ON. .... .1.. PDECNTRL X'04' CONTROL PATH .... ..1. PDEPEND1 X'02' INITIATED CONNECTION .... ...1 PDEPEND2 X'01' INCOMING CONNECTION .... .... PDEZERO X'00' PDEBK INVALID AND AVAILABLE 00000003 PDESEVRD PDEPEND1+PDEPEND2 ENTRY HAS BEEN SEVERED 000D 13 Bitstring 1 PDEAPPFL APPC/VM FLAGS 1... .... PDEAPPC X'80' APPC/VM PATH .1.. .... PDEAPSCF X'40' SENDCNF/SENDCNFD PERMITTED ..1. .... PDEAPRCQ X'20' MSGBLOK QUEUED ON RECEIVE QUEUE ...1 .... PDEAPSNQ X'10' MSGBLOK QUEUED ON SEND QUEUE .... 1... PDEAPPND X'08' FUNCTION PENDING ON THIS PATH .... .1.. PDEAPSRQ X'04' SENDREQ PENDING ON THIS PATH .... ..1. PDEAPMPD X'02' MESSAGE PENDING BUT NOT IN RECEIVE STATE .... ...1 PDEPURGE X'01' IUCV PURGE allowed on this path NOTES : PDESTATE IS AN EXTERNAL VALUE. IF A NEW STATE IS ADDED THERE ARE TABLES IN THE MODULES WHICH HANDLE SEND, RECEIVE AND SEVER PROCESSING WHICH HAVE CORRESPONDING ENTRIES ADDED. 000E 14 Bitstring 1 PDESTATE APPC/VM STATE CODES .... ...1 PDESRSET X'01' PATH IN RESET STATE .... ..1. PDESTCON X'02' PATH IN CONNECT STATE .... ..11 PDESTSND X'03' PATH IN SEND STATE .... .1.. PDESTRCV X'04' PATH IN RECEIVE STATE .... .1.1 PDESTCFM X'05' PATH IN CONFIRM STATE .... .11. PDESTSVR X'06' PATH IN SEVER STATE .... .111 PDESDEFR X'07' PATH IN DEFER_RECEIVE STATE .... 1... PDESDEFS X'08' PATH IN DEFER_SEVER STATE .... 1..1 PDESPREP X'09' PATH IN PREPARE_RECEIVED STATE .... 1.1. PDESSRCM X'0A' PATH IN STATE ... . SOLICITED_REQUEST_COMMIT_RECEIVED .... 1.11 PDESURCM X'0B' PATH IN STATE ... . UNSOLICITED_REQUEST_COMMIT_RECEIV ED .... 11.. PDESCMTD X'0C' PATH IN COMMITED_RECEIVED STATE .... 11.1 PDESBOUT X'0D' PATH IN BACKOUT_RECEIVED STATE .... 111. PDESBKRQ X'0E' PATH IN BACKOUT_REQUIRED STATE 000F 15 Bitstring 1 PDEAPPF2 SECOND APPC/VM FLAG BYTE 1... .... PDECMSRV X'80' COMMUNICATION SERVER PATH .1.. .... PDELGDOK X'40' WILLING TO RECEIVE LOG_DATA ..1. .... PDELGDAT X'20' LOG_DATA PENDING ON PATH ...1 .... PDELDSVR X'10' PATH SEVERED WITH LOG_DATA .... 1... PDETGOK X'08' TARGET PATH IS STILL VALID .... .1.. PDESNCPT X'04' SYNCPT FLOWS ALLOWED ON PATH .... ..1. PDECHGDR X'02' CHANGE DIRECTION IS OK .... ...1 PDEPDSPF X'01' SETSTATE INV- SYNCPT FLOW PENDING 0010 16 Bitstring 1 PDEAPPF3 THIRD APPC/VM FLAG BYTE 1... .... PDELRCNV X'80' ONLY FIRST BYTE OF LOGICAL RECORD LENGTH AVAILABLE IN CURRENT BUFFER .1.. .... PDEACIMM X'40' ALLOCATE STATE AND RECEIVE STATE ..1. .... PDESTBKR X'20' BACKOUT_REQUIRED SET VIA SETSTATE ...1 .... PDEMDRCV X'10' REQUEST RECEIVE STATE MODIFIER .... 1... PDEMDSVR X'08' REQUEST SEVER STATE MODIFIER .... .1.. PDEGOTPR X'04' PREPARE RECEIVED ON PATH .... ..1. PDESNTPR X'02' PREPARE SENT ON PATH .... ...1 PDESNCIP X'01' SYNCPOINT IN PROGRESS 0011 17 Bitstring 1 PDEAPPF4 STATE RELATED FIELDS CONTROL 1... .... PDENEWLU X'80' PARTNER SUPPORTS RECEIVING LUWID .1.. .... PDEPHAS2 X'40' IN 2ND PHASE OF 2-PHASE SYNCPT ..1. .... PDEAPPCW X'20' PATH IN APPCVM WAIT ...1 .... PDESUSPC X'10' PATH IN SUSPENDED CONNECT .... 1... PDEALLAV X'08' PDESADDR IS VALID CONBK ADDRESS CONBK IS ALLOCATION DATA .... .1.. PDECCED X'04' PDESADDR IS VALID CCED ADDRESS .... ..1. PDEALTID X'02' THIS PATH SET VMDALTID, SEVERING THIS PATH WILL CLEAR IT .... ...1 PDELUWID X'01' STOP SENDBACK, SENDERR FOR NOW 0012 18 Signed 2 PDELRECL LENGTH REMAINING IN LOGICAL RECORD 0014 20 Signed 4 PDESADDR STATE RELATED ADDRESS IUSBK OR CONBK ADDRESS 0018 24 Signed 2 PDEMSGLM MESSAGE LIMIT 001A 26 Bitstring 1 PDESAVST PREVIOUS STATE OF PATH 001B 27 Bitstring 1 PDEAPPF5 FIFTH FLAG BYTE 1... .... PDECANCL X'80' Suspended CONNECT has been can- celled, blocks will be released .... 1... PDESVSIP X'08' SEVER ISSUED DURING SYNCPT .... .1.. PDEPBRIP X'04' PARTNER SPECIFIED RIP ON BACKOUT .... ..1. PDELGPRT X'02' LOG DATA PARTIALLY RECEIVED .... ...1 PDELGSNC X'01' LOG DATA SENT DURING SYNCPT 001C 28 Bitstring 1 * (4) RESERVED 00000004 PDESIZE (*-PDEBK+7)/8 PDEBK SIZE IN DOUBLEWORDS NOTES : IN ORDER FOR THE PDEBK MANAGEMENT CODE TO WORK PROPERLY THE FOLLOWING TWO VALUES MUST ALWAYS BE ROUNDED TO THE NEAREST DOUBLE WORD VALUE. 00000008 PDENTMIN 8 MIN NUMBER OF PDEBKS TO BE BUILT 00000080 PDENTMAX 128 MAXIMUM PDEBKS IN A PDSEG
PDEBK Storage Layout
*** PDEBK - PATH DESCRIPTOR ENTRY
*
* +-------------+-------------+---------------------------+
* 0 | PDEMSGCT | PDETGPID | PDETGCCT |
* +-------------+-------------+------+------+------+------+
* 8 | PDETGLKA |:FLAGS|:APPFL|:STATE|:APPF2|
* +------+------+-------------+------+------+------+------+
* 10 |:APPF3|:APPF4| PDELRECL | PDESADDR |
* +------+------+------+------+---------------------------+
* 18 | PDEMSGLM |:SAVST|:APPF5|///////////////////////////|
* +-------------+------+------+---------------------------+
* 20
*
*** PDEBK - PATH DESCRIPTOR ENTRY
PDEBK Cross Reference
Symbol Dspl Value -------------- ---- ----- PDEACIMM 0010 40 PDEALLAV 0011 08 PDEALTID 0011 02 PDEAPMPD 000D 02 PDEAPPC 000D 80 PDEAPPCW 0011 20 PDEAPPFL 000D PDEAPPF2 000F PDEAPPF3 0010 PDEAPPF4 0011 PDEAPPF5 001B PDEAPPND 000D 08 PDEAPRCQ 000D 20 PDEAPSCF 000D 40 PDEAPSNQ 000D 10 PDEAPSRQ 000D 04 PDECANCL 001B 80 PDECCED 0011 04 PDECHGDR 000F 02 PDECMSRV 000F 80 PDECNTRL 000C 04 PDEFLAGS 000C PDEGOTPR 0010 04 PDELDSVR 000F 10 PDELGDAT 000F 20 PDELGDOK 000F 40 PDELGPRT 001B 02 PDELGSNC 001B 01 PDELRCNV 0010 80 PDELRECL 0012 PDELUWID 0011 01 PDEMDRCV 0010 10 PDEMDSVR 0010 08 PDEMSGCT 0000 PDEMSGLM 0018 PDENEWLU 0011 80 PDENTMAX 001C 00000080 PDENTMIN 001C 00000008 PDEPBRIP 001B 04 PDEPDSPF 000F 01 PDEPEND1 000C 02 PDEPEND2 000C 01 PDEPHAS2 0011 40 PDEPHELD 000C 08 PDEPRMD 000C 10 PDEPRTY 000C 20 PDEPURGE 000D 01 PDESADDR 0014 PDESAVST 001A PDESBKRQ 000E 0E PDESBOUT 000E 0D PDESCMTD 000E 0C PDESDEFR 000E 07 PDESDEFS 000E 08 PDESEND 000C 40 PDESEVRD 000C 00000003 PDESIZE 001C 00000004 PDESNCIP 0010 01 PDESNCPT 000F 04 PDESNTPR 0010 02 PDESPREP 000E 09 PDESRSET 000E 01 PDESSRCM 000E 0A PDESTATE 000E PDESTBKR 0010 20 PDESTCFM 000E 05 PDESTCON 000E 02 PDESTRCV 000E 04 PDESTSND 000E 03 PDESTSVR 000E 06 PDESURCM 000E 0B PDESUSPC 0011 10 PDESVSIP 001B 08 PDETGCCT 0004 PDETGLKA 0008 PDETGOK 000F 08 PDETGPID 0002 PDEVALID 000C 80 PDEZERO 000C 00
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