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Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
QDGBL
Cross Reference (Contains links to field and bit definitions)
QDGBL Prolog
Name : Virtual Disk in Storage Global Control Block
Description: V-Disk Global Control Block
DSECT : QDGBL
Function : This control block maps the global V-Disk
control block for the system.
Located by : HCPSYSCM - System Common Area
Created by : HCPQDLIN
Deleted by : none
QDGBL Control Block Content
QDGBL DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure QDGBL V-Disk Global Control Block Vdisk chain of MDISK blocks and allocation lockword 0000 0 Dbl-Word 8 QDGALOCK (3) Vdisk Allocation Lockword 0018 24 Signed 4 QDGMDISK First MDISK block for Vdisk Fields for keeping track of limits (in blocks) 001C 28 Signed 4 QDGSYSLM Limit of total Vdisk allocation 0020 32 Signed 4 QDGUSRLM Limit of size of Vdisks DEFINEd by a user (using DEFINE) 0024 36 Signed 4 QDGSYSCA Total currently-allocated Vdisk blocks 0028 40 Signed 2 * Reserved 002A 42 Signed 2 QDGCOUNT Vdisk counter for addr. space name (increment and save) 002C 44 Signed 4 QDGLKCNT Total number of LINKs to all Vdisks (includes 1 for each DEFINEd VDisk) 0030 48 Signed 4 QDGDISKS Total number of existing Vdisks 0034 52 Signed 4 QDGSYSLD Default of QDGSYSLM 0038 56 Signed 4 QDGUSRLD Default of QDGUSRLM 003C 60 Bitstring 1 QDGAFLAG 'A' flag byte 1... .... QDGASYSC X'80' - SYSTEM CONFIG set syslim 003D 61 Bitstring 1 * (3) Reserved 00000008 QDGSIZE ((*-QDGBL+7)/8) SIZE IN DWS FOR FREE/FRET
QDGBL Storage Layout
*** QDGBL - V-Disk Global Control Block * * +-------------------------------------------------------+ * 0 | | * = QDGALOCK = * | | * +---------------------------+---------------------------+ * 18 | QDGMDISK | QDGSYSLM | * +---------------------------+---------------------------+ * 20 | QDGUSRLM | QDGSYSCA | * +-------------+-------------+---------------------------+ * 28 |/////////////| QDGCOUNT | QDGLKCNT | * +-------------+-------------+---------------------------+ * 30 | QDGDISKS | QDGSYSLD | * +---------------------------+------+--------------------+ * 38 | QDGUSRLD |:AFLAG|////////////////////| * +---------------------------+------+--------------------+ * 40 * *** QDGBL - V-Disk Global Control Block
QDGBL Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----QDGAFLAG 003C
QDGALOCK 0000
QDGASYSC 003C 80
QDGCOUNT 002A
QDGDISKS 0030
QDGLKCNT 002C
QDGMDISK 0018
QDGSIZE 003D 00000008
QDGSYSCA 0024
QDGSYSLD 0034
QDGSYSLM 001C
QDGUSRLD 0038
QDGUSRLM 0020
Last updated on 3 Aug 1999 at 12:25:44 EDT.
Copyright IBM Corporation, 1990, 1999