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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. |
ALCBK
Cross Reference (Contains links to field and bit definitions)
ALCBK Prolog
Name : HCPALCBK
Description: Access-List Control Block
DSECT : ALCBK
Function : This DSECT maps the control block used to manage an
ESA/370 access list.
Located by : ALEALCBK in the second access-list entry of an access
list built by CP (the one with ALEN=1).
Created by : HCPALMCR when an access list is created.
Deleted by : HCPALMDS when an access list is destroyed.
Notes : The contents of this control block, and the access-list
designation indicated by ALCALD are serialized by the
access-list-control lock, the lockword for which is
ASCLOCK.
ALCBK Control Block Content
ALCBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure ALCBK Access-List Control Block block. 0000 0 Address 4 ALCALD Address of access-list designation. 0004 4 Address 4 ALCAL Address of access list 0008 8 Address 4 ALCOWNER Address of VMDBK which owns the access list. 000C 12 Signed 4 * Reserved for IBM use 0010 16 Address 4 ALCSPIBK Anchor for chain of SPIBKs defining what address spaces may be attached to this access list. This is serialized by the space-permission-manager lock (RSASPMLK in HCPRSMCM). 0014 20 Address 4 ALCDEFRQ Anchor for queue of tasks adding entries to the CP-use AL which have been deferred because the CP-use access list is full. 0018 24 Dbl-Word 8 ALCLOCK (3) Lockword for access-list-control lock. 0030 48 Signed 4 ALCALSIZ Size of access list, in bytes. 0034 52 Signed 4 ALCMAXSZ Largest permitted size of access list, in bytes. 0038 56 Signed 4 ALCFREE Number of ALEs in the invalid state (not including ALENs 0 and 1). This is the number of ALEs available for allocation. 003C 60 Signed 4 ALCNXTCP Next ALE to allocate in the CP-use access list. 00000040 ALCLEN *-ALCBK Length in bytes of ALCBK. 00000008 ALCSIZE (ALCLEN+7)/8 Size in doublewords of an ALCBK
ALCBK Storage Layout
*** ALCBK - Access-List Control Block * * +---------------------------+---------------------------+ * 0 | ALCALD | ALCAL | * +---------------------------+---------------------------+ * 8 | ALCOWNER |///////////////////////////| * +---------------------------+---------------------------+ * 10 | ALCSPIBK | ALCDEFRQ | * +---------------------------+---------------------------+ * 18 | | * = ALCLOCK = * | | * +---------------------------+---------------------------+ * 30 | ALCALSIZ | ALCMAXSZ | * +---------------------------+---------------------------+ * 38 | ALCFREE | ALCNXTCP | * +---------------------------+---------------------------+ * 40 * *** ALCBK - Access-List Control Block
ALCBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----ALCAL 0004
ALCALD 0000
ALCALSIZ 0030
ALCDEFRQ 0014
ALCFREE 0038
ALCLEN 003C 00000040
ALCLOCK 0018
ALCMAXSZ 0034
ALCNXTCP 003C
ALCOWNER 0008
ALCSIZE 003C 00000008
ALCSPIBK 0010
Last updated on 3 Aug 1999 at 11:39:01 EDT.
Copyright IBM Corporation, 1990, 1999