LKBK Back to Index page
 
Prolog 
Control Block Contents 
   LKBK 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.


  LKBK Prolog Top of page
 
 NAME       : HCPLKBK
 DESCRIPTION: Minidisk LINK Block
 DSECT      : LKBK
 FUNCTION   : A representation of a minidisk being defined.
 LOCATED BY : None
 CREATED BY : HCPDEF,HCPLNK,HCPLGD,HCPDMD,HCPZIA,HCPZAC
 DELETED BY : HCPDEF,HCPLNK,HCPLGD,HCPDMD,HCPZIA,HCPZAC
 SERIALIZED : None
              Exists only during the creation of a link due to one of
              - Command LINK
              - Command DEFINE MDISK
              - Command DEFINE VFB-512 (qdisk)
              - Command DEFINE Tnnnn  (tdisk)
              - Logon directory statement LINK
              - Logon directory statement MDISK
              - Logon directory statement MDISK V-DISK
              - Logon directory statement MDISK T-DISK
              - Diagnose X'E4' subcode X'01'
              - Diagnose X'E4' subcode X'02' (fullpack overlay)
              - Diagnose X'E4' subcode X'03' (fullpack overlay)
              - Execution of CP_ACCESS statement or CPACCESS command
 
 
  LKBK Control Block Content Top of page
 

 LKBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure LKBK Minidisk LINK Block link description in indirect terms 0000 0 Character 8 LKXITOU link-to userid 0008 8 Character 8 LKXITOCM link-to CMS adjunct user identifier 0010 16 Signed 2 LKXITOV link-to vdevno 0012 18 Signed 2 LKXIASV link-as vdevno 0014 20 Character 2 LKXIMODC link mode (string) 0016 22 Bitstring 1 LKXIMODE link mode code (less than X'40') 0017 23 Bitstring 1 LKXIMODX link mode code w/extensions 0018 24 Character 8 LKXIPSWD password entered link description in direct terms (actual mdisk) 0020 32 Character 8 LKXOWNRU owning userid 0028 40 Signed 2 LKXRDEVN rdevno 002A 42 Character 6 LKXVSER volume serial number 0030 48 Signed 2 LKXOWNRV owning vdevno 0032 50 Bitstring 1 LKXMFLG2 Additional MDISK flags 1... .... LKXLOCAL X'80' LKXLOCAL - minidisk local to this system .1.. .... LKXPRVMD X'40' LKXPRVMD - private minidisk ..1. .... LKXLKCOM X'20' LKXLKCOM - communicated for LINK ...1 .... LKXVFORC X'10' LKXVFORC - "v" suffix forced .... 1... LKXWFORC X'08' LKXWFORC - WRKALLEG forced .... .1.. LKXWKADD X'04' LKXWKADD - WRKALLEG added .... ..1. LKXEAVM X'02' LKXEAVM - This is a EAV minidisk 0033 51 Bitstring 1 * reserved 0034 52 Signed 4 LKXSEXT start cylinder/block of minidisk extent 0038 56 Signed 4 LKXEEXT end cylinder/block of minidisk 003C 60 Signed 4 LKXNEXT number of cylinders/blocks 0040 64 Signed 2 LKXCODE (0) (class and type together) \ 0040 64 Bitstring 1 LKXCLAS device class (=DASD) | 0041 65 Bitstring 1 LKXTYPE DASD type / 0042 66 Bitstring 1 LKXMFLAG mdisk flags: 1... .... LKXTDISK X'80' LKXTDISK - temporary dasd (tdisk) request .1.. .... LKXDED X'40' LKXDED - dedicated dasd ..1. .... LKXEND X'20' LKXEND - 'END' specified ...1 .... LKXV X'10' LKXV - virtual reserve/release request .... 1... LKXNOASN X'08' LKXNOASN - 'NOASSIGN' option .... .1.. LKXDVFP X'04' LKXDVFP - 'DEVNO' option specified .... ..1. LKXFB512 X'02' LKXFB512 - 'FB-512' (any FBA) specified .... ...1 LKXWRKAL X'01' LKXWRKAL - 'WRKALLEG' specified The following byte is copied intact from DDEVFLGB. 0043 67 Bitstring 1 LKXJFLAG minidisk caching directory flags: X'80' - (would be from DDEVWKAL) .1.. .... LKXJCNA X'40' - caching not available ..1. .... LKXJSCTL X'20' - subsystem control ...1 .... LKXJDCTL X'10' - device control .... 1... LKXJNCTL X'08' - no control .... .1.. LKXJNMDC X'04' - NOMDC specified .... ..1. LKXJQDSK X'02' - Vdisk request .... ...1 LKXJYMDC X'01' - MDC specified link authorization 0044 68 Bitstring 1 LKXAMODE link mode, directory authorization 0045 69 Bitstring 1 LKXAMODX link mode (w/ exten), dir auth 0046 70 Bitstring 1 LKXAFLAG authorization flags: X'E0' - password exists on MDISK stmt (three bits defined for DDEVALNK) .... 1... LKXACI2 X'08' - Calling the ESM a second time for audit of link mode granted .... .1.. LKXACIDN X'04' - Call to ESM routine was made .... ..1. LKXACION X'02' - Indicates ESM should be called for authorization and/or audit .... ...1 LKXACIRO X'01' - forced R/O by ACI description of link device already defined 0047 71 Bitstring 1 LKXHFLAG "have" flags 1... .... LKXEXIST X'80' LKXEXIST - LKXIASV already def'd .1.. .... LKXRELIN X'40' LKXRELIN - relink (request = have) ..1. .... LKXOVLAP X'20' LKXOVLAP - requested mdisk overlaps others ...1 .... LKXQDLOK X'10' LKXQDLOK - have Vdisk allocation lock blocks 0048 72 Signed 4 LKXGMDSK address of MDISK with same extent 004C 76 Signed 4 LKXGVDEV address of VDEV just created or being relinked description of other links including overlapping minidisks 0050 80 Signed 4 LKXRCNT count of read links 0054 84 Signed 4 LKXWCNT count of write links 0058 88 Signed 4 LKXSCNT count of stable links 005C 92 Signed 4 LKXECNT count of exclusive links (0 or 1) 0060 96 Signed 4 LKXRCMSA Adjunct read link work area 0064 100 Signed 4 LKXWCMSA Adjunct write link work area 0068 104 Signed 4 LKXSCMSA Adjunct stable link work area 006C 108 Signed 4 LKXECMSA Adjunct exclusive link work area 0070 112 Character 8 LKXRUSER userid of read link, if one exists 0078 120 Character 8 LKXWUSER userid of write link, if one exists 0080 128 Character 8 LKXSUSER userid of stable link, if one exists 0088 136 Character 8 LKXEUSER userid of exclusive link, if one exists 0090 144 Bitstring 1 LKXGMODE link mode 0091 145 Bitstring 1 LKXGMODX link mode extended 0092 146 Bitstring 1 LKXCFLAG conflict flags 1... .... LKXCFORC X'80' LKXCFORC - R/W request downgraded to R/O .1.. .... LKXCMDCP X'40' LKXCMDCP - MDC prohibited ..1. .... LKXCRECC X'20' LKXCRECC - MDC record cache requested ...1 .... LKXNOPLX X'10' LKXNOPLX - Don't ask SSI .... 1... LKXWTLNK X'08' LKXWTLNK - Other member of SSI has a write link .... .1.. LKXRDFPO X'04' LKXRDFPO - Other member of SSI has a DIAG xE4 fullpack overlay .... ..1. LKXOSUBC X'02' LKXOSUBC - Defined in SUBCONFIG for a different SSI member miscellanea 0093 147 Bitstring 1 LKXFMTNO format number (device class) 0094 148 Bitstring 1 LKXFROM style of link: .... .... LKXFLOG 0 LKXFLOG - from logon (dir MDISK or LINK) .... ...1 LKXFLOGQ 1 LKXFLOGQ - from logon (with quiet option) .... ..1. LKXFLINK 2 LKXFLINK - from command LINK .... ..11 LKXFDEF 3 LKXFDEF - from command DEFINE MDISK .... .1.. LKXFINFO 4 LKXFINFO - from diag E4 INFO f1 DISK or SET/Q MDCACHE command .... .1.1 LKXFFPO2 5 LKXFFPO2 - from diag E4 FPO f2 DISK .... .11. LKXFFPO3 6 LKXFFPO3 - from diag E4 FPO f3 DISK .... .111 LKXFCPAC 7 LKXFCPAC - from command CPACCESS .... 1... LKXFDEFQ 8 LKXFDEFQ - from command DEFINE VFB-512 .... 1..1 LKXFDG88 9 LKXFDG88 - from Diagnose 88 .... 1.1. LKXFRELO 10 LKXFRELO - from Live Guest Relocation special parameters for error messages 0095 149 Bitstring 1 LKXERROR LKX* error number 00000001 LKX002 X'01' LKX002 00000002 LKX020 X'02' LKX020 00000003 LKX022 X'03' LKX022 00000004 LKX024 X'04' LKX024 00000005 LKX026 X'05' LKX026 00000006 LKX046 X'06' LKX046 00000007 LKX052 X'07' LKX052 00000008 LKX053 X'08' LKX053 00000009 LKX091 X'09' LKX091 00000035 LKX091V2 X'35' LKX091V2 0000000A LKX092 X'0A' LKX092 0000000B LKX107 X'0B' LKX107 0000000C LKX108 X'0C' LKX108 0000000D LKX109 X'0D' LKX109 00000034 LKX109V2 X'34' LKX109V2 0000000E LKX110 X'0E' LKX110 0000000F LKX114 X'0F' LKX114 00000010 LKX115 X'10' LKX115 00000011 LKX117 X'11' LKX117 00000012 LKX118 X'12' LKX118 00000013 LKX153 X'13' LKX153 00000014 LKX298 X'14' LKX298 00000015 LKX844 X'15' LKX844 00000016 LKX6525 X'16' LKX6525 00000017 LKX1150 X'17' LKX1150 00000018 LKX1151 X'18' LKX1151 00000019 LKX1152 X'19' LKX1152 0000001A LKX1153 X'1A' LKX1153 0000001B LKX1155 X'1B' LKX1155 0000001C LKX1156 X'1C' LKX1156 0000001D LKX111 X'1D' LKX111 0000001E LKX112 X'1E' LKX112 0000001F LKX113 X'1F' LKX113 messages with counts & userids follow 00000020 LKX100 X'20' LKX100 base emsg-s 00000021 LKX101 X'21' LKX101 00000022 LKX102 X'22' LKX102 00000023 LKX103 X'23' LKX103 00000024 LKX104 X'24' LKX104 00000025 LKX105 X'25' LKX105 00000026 LKX106 X'26' LKX106 imsg-s (responses) 0000002A LKXR1 X'2A' LKXR1 0000002B LKXR2 X'2B' LKXR2 0000002C LKXR3 X'2C' LKXR3 0000002D LKXR4 X'2D' LKXR4 0000002E LKXR5 X'2E' LKXR5 0000002F LKXR6 X'2F' LKXR6 End of messages with counts & userids 00000030 LKX1157 X'30' LKX1157 00000031 LKX1158 X'31' LKX1158 00000032 LKX6761 X'32' LKX6761 00000033 LKX1159 X'33' LKX1159 00000036 LKX2880 X'36' LKX2880 00000037 LKX6867 X'37' LKX6867 00000038 LKX6867H X'38' LKX6867H 00000039 LKX6640 X'39' LKX6640 0000003A LKX6645 X'3A' LKX6645 0000003B LKX048 X'3B' LKX048 0000003C LKX66409 X'3C' LKX66409 0000003D LKX091V3 X'3D' LKX091V3 X'E0'-X'FF' all reserved for return codes. 000000E0 LKXE23 X'E0' LKXE23 0096 150 Signed 2 LKXERRV vdevno for some error messages link processing options 0098 152 Bitstring 1 LKXOPTS Options to use for linking 1... .... LKXNOMSG X'80' LKXNOMSG - Don't issue any messages .1.. .... LKXNOPWD X'40' LKXNOPWD - No password needed (regardless of VMDLNKNP setting) ..1. .... LKXPWDRQ X'20' LKXPWDRQ - Password required (regardless of VMDLNKNP setting) ...1 .... LKXPWMOD X'10' LKXPWMOD - Establish link with mode authorized by supplied password journaling bits 0099 153 Bitstring 1 LKXJOURN Status of journaling operations 1... .... LKXPWALL X'80' LKXPWALL - password of ALL encountered .1.. .... LKXNJOUR X'40' LKXNJOUR - user is relinking with same addr & mode, no journaling needed ..1. .... LKXSELFL X'20' LKXSELFL - disk being linked is own disk 009A 154 Bitstring 1 LKXINMOD Input behavior modifier field 1... .... LKXNOLKS X'80' LKXNOLKS Hold no locks upon exit 009B 155 Bitstring 1 LKXGFLGS General link flags 1... .... LKXQMDIS X'80' LKXQMDIS Diag E4 function called via Q Mdisk .1.. .... LKXPAVAL X'40' LKXPAVAL Virtual PAV Alias is being defined ..1. .... LKXHYPAL X'20' LKXHYPAL Virtual HPV Alias is being defined ...1 .... LKXQRMDI X'10' LKXQRMDI Diag E4 function called via Q Mdisk reserved .... 1... LKXCPACA X'08' LKXCPACA Asynch CPACCESS issued .... .1.. LKXCPACS X'04' LKXCPACS Synch CPACCESS issued 009C 156 Signed 4 LKXEMSGN emsgno that was last issued 00A0 160 Character 8 LKXAUSER user to perform checks for 00A8 168 Character 112 LKXBUFF message data buffer 0118 280 Dbl-Word 8 LKXTOD TOD buffer for Vdisk 0120 288 Character 8 LKXACTNM Account number for Vdisk 0128 296 Character 8 LKRESSYS Name of system which holds the reserve OR the system on which LKRESUSR resides. 0130 304 Character 8 LKRESUSR Name of the user who holds the reserve 0138 312 Signed 4 LKXWMASK Mask of system(s) with write link 013C 316 Signed 4 LKXLGRVD Address of LGRVDEV 0140 320 Dbl-Word 8 LKXLKTIM Time spent communicating for LINK 0148 328 Character 8 LKXRMEMB Member name for read link 0150 336 Character 8 LKXWMEMB Member name for write link 0158 344 Character 8 LKXSMEMB Member name for stable link 0160 352 Character 8 LKXEMEMB Member name for exclusive link 0168 360 Character 8 LKXTUSR Userid for ACITUSR 0170 368 Character 8 LKXSUBCF Userid for ACISUBCF 0178 376 Signed 4 LKXATVMD Addr of AT Command VMDBK 00000030 LKXSIZE (*-LKBK+7)/8 Size, in doublewords, of LKBK
 
 
  LKBK Storage Layout Top of page
 
          
*** LKBK - Minidisk LINK Block
*
*     +-------------------------------------------------------+
*   0 |                       LKXITOU                         |
*     +-------------------------------------------------------+
*   8 |                       LKXITOCM                        |
*     +-------------+-------------+-------------+------+------+
*  10 |  LKXITOV    |  LKXIASV    |  LKXIMODC   |:IMODE|:IMODX|
*     +-------------+-------------+-------------+------+------+
*  18 |                       LKXIPSWD                        |
*     +-------------------------------------------------------+
*  20 |                       LKXOWNRU                        |
*     +-------------+-----------------------------------------+
*  28 |  LKXRDEVN   |                LKXVSER                  |
*     +-------------+------+------+---------------------------+
*  30 |  LKXOWNRV   |:MFLG2|//////|         LKXSEXT           |
*     +-------------+------+------+---------------------------+
*  38 |         LKXEEXT           |         LKXNEXT           |
*     +------+------+------+------+------+------+------+------+
*  40 |:CLAS |:TYPE |:MFLAG|:JFLAG|:AMODE|:AMODX|:AFLAG|:HFLAG|
*     +------+------+------+------+------+------+------+------+
*  48 |         LKXGMDSK          |         LKXGVDEV          |
*     +---------------------------+---------------------------+
*  50 |         LKXRCNT           |         LKXWCNT           |
*     +---------------------------+---------------------------+
*  58 |         LKXSCNT           |         LKXECNT           |
*     +---------------------------+---------------------------+
*  60 |         LKXRCMSA          |         LKXWCMSA          |
*     +---------------------------+---------------------------+
*  68 |         LKXSCMSA          |         LKXECMSA          |
*     +---------------------------+---------------------------+
*  70 |                       LKXRUSER                        |
*     +-------------------------------------------------------+
*  78 |                       LKXWUSER                        |
*     +-------------------------------------------------------+
*  80 |                       LKXSUSER                        |
*     +-------------------------------------------------------+
*  88 |                       LKXEUSER                        |
*     +------+------+------+------+------+------+-------------+
*  90 |:GMODE|:GMODX|:CFLAG|:FMTNO|:FROM |:ERROR|  LKXERRV    |
*     +------+------+------+------+------+------+-------------+
*  98 |:OPTS |:JOURN|:INMOD|:GFLGS|         LKXEMSGN          |
*     +------+------+------+------+---------------------------+
*  A0 |                       LKXAUSER                        |
*     +-------------------------------------------------------+
*  A8 |                                                       |
*     =                       LKXBUFF                         =
*     |                                                       |
*     +-------------------------------------------------------+
* 118 |                        LKXTOD                         |
*     +-------------------------------------------------------+
* 120 |                       LKXACTNM                        |
*     +-------------------------------------------------------+
* 128 |                       LKRESSYS                        |
*     +-------------------------------------------------------+
* 130 |                       LKRESUSR                        |
*     +---------------------------+---------------------------+
* 138 |         LKXWMASK          |         LKXLGRVD          |
*     +---------------------------+---------------------------+
* 140 |                       LKXLKTIM                        |
*     +-------------------------------------------------------+
* 148 |                       LKXRMEMB                        |
*     +-------------------------------------------------------+
* 150 |                       LKXWMEMB                        |
*     +-------------------------------------------------------+
* 158 |                       LKXSMEMB                        |
*     +-------------------------------------------------------+
* 160 |                       LKXEMEMB                        |
*     +-------------------------------------------------------+
* 168 |                       LKXTUSR                         |
*     +-------------------------------------------------------+
* 170 |                       LKXSUBCF                        |
*     +---------------------------+---------------------------+
* 178 |         LKXATVMD          | 17C
*     +---------------------------+
*
*** LKBK - Minidisk LINK Block
 
 
  LKBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
LKRESSYS       0128
LKRESUSR       0130
LKXACIDN       0046 04
LKXACION       0046 02
LKXACIRO       0046 01
LKXACI2        0046 08
LKXACTNM       0120
LKXAFLAG       0046
LKXAMODE       0044
LKXAMODX       0045
LKXATVMD       0178
LKXAUSER       00A0
LKXBUFF        00A8
LKXCFLAG       0092
LKXCFORC       0092 80
LKXCLAS        0040
LKXCMDCP       0092 40
LKXCODE        0040
LKXCPACA       009B 08
LKXCPACS       009B 04
LKXCRECC       0092 20
LKXDED         0042 40
LKXDVFP        0042 04
LKXEAVM        0032 02
LKXECMSA       006C
LKXECNT        005C
LKXEEXT        0038
LKXEMEMB       0160
LKXEMSGN       009C
LKXEND         0042 20
LKXERROR       0095
LKXERRV        0096
LKXEUSER       0088
LKXEXIST       0047 80
LKXE23         0095 000000E0
LKXFB512       0042 02
LKXFCPAC       0094 07
LKXFDEF        0094 03
LKXFDEFQ       0094 08
LKXFDG88       0094 09
LKXFFPO2       0094 05
LKXFFPO3       0094 06
LKXFINFO       0094 04
LKXFLINK       0094 02
LKXFLOG        0094 00
LKXFLOGQ       0094 01
LKXFMTNO       0093
LKXFRELO       0094 0A
LKXFROM        0094
LKXGFLGS       009B
LKXGMDSK       0048
LKXGMODE       0090
LKXGMODX       0091
LKXGVDEV       004C
LKXHFLAG       0047
LKXHYPAL       009B 20
LKXIASV        0012
LKXIMODC       0014
LKXIMODE       0016
LKXIMODX       0017
LKXINMOD       009A
LKXIPSWD       0018
LKXITOCM       0008
LKXITOU        0000
LKXITOV        0010
LKXJCNA        0043 40
LKXJDCTL       0043 10
LKXJFLAG       0043
LKXJNCTL       0043 08
LKXJNMDC       0043 04
LKXJOURN       0099
LKXJQDSK       0043 02
LKXJSCTL       0043 20
LKXJYMDC       0043 01
LKXLGRVD       013C
LKXLKCOM       0032 20
LKXLKTIM       0140
LKXLOCAL       0032 80
LKXMFLAG       0042
LKXMFLG2       0032
LKXNEXT        003C
LKXNJOUR       0099 40
LKXNOASN       0042 08
LKXNOLKS       009A 80
LKXNOMSG       0098 80
LKXNOPLX       0092 10
LKXNOPWD       0098 40
LKXOPTS        0098
LKXOSUBC       0092 02
LKXOVLAP       0047 20
LKXOWNRU       0020
LKXOWNRV       0030
LKXPAVAL       009B 40
LKXPRVMD       0032 40
LKXPWALL       0099 80
LKXPWDRQ       0098 20
LKXPWMOD       0098 10
LKXQDLOK       0047 10
LKXQMDIS       009B 80
LKXQRMDI       009B 10
LKXRCMSA       0060
LKXRCNT        0050
LKXRDEVN       0028
LKXRDFPO       0092 04
LKXRELIN       0047 40
LKXRMEMB       0148
LKXRUSER       0070
LKXR1          0095 0000002A
LKXR2          0095 0000002B
LKXR3          0095 0000002C
LKXR4          0095 0000002D
LKXR5          0095 0000002E
LKXR6          0095 0000002F
LKXSCMSA       0068
LKXSCNT        0058
LKXSELFL       0099 20
LKXSEXT        0034
LKXSIZE        0178 00000030
LKXSMEMB       0158
LKXSUBCF       0170
LKXSUSER       0080
LKXTDISK       0042 80
LKXTOD         0118
LKXTUSR        0168
LKXTYPE        0041
LKXV           0042 10
LKXVFORC       0032 10
LKXVSER        002A
LKXWCMSA       0064
LKXWCNT        0054
LKXWFORC       0032 08
LKXWKADD       0032 04
LKXWMASK       0138
LKXWMEMB       0150
LKXWRKAL       0042 01
LKXWTLNK       0092 08
LKXWUSER       0078
LKX002         0095 00000001
LKX020         0095 00000002
LKX022         0095 00000003
LKX024         0095 00000004
LKX026         0095 00000005
LKX046         0095 00000006
LKX048         0095 0000003B
LKX052         0095 00000007
LKX053         0095 00000008
LKX091         0095 00000009
LKX091V2       0095 00000035
LKX091V3       0095 0000003D
LKX092         0095 0000000A
LKX100         0095 00000020
LKX101         0095 00000021
LKX102         0095 00000022
LKX103         0095 00000023
LKX104         0095 00000024
LKX105         0095 00000025
LKX106         0095 00000026
LKX107         0095 0000000B
LKX108         0095 0000000C
LKX109         0095 0000000D
LKX109V2       0095 00000034
LKX110         0095 0000000E
LKX111         0095 0000001D
LKX112         0095 0000001E
LKX113         0095 0000001F
LKX114         0095 0000000F
LKX115         0095 00000010
LKX1150        0095 00000017
LKX1151        0095 00000018
LKX1152        0095 00000019
LKX1153        0095 0000001A
LKX1155        0095 0000001B
LKX1156        0095 0000001C
LKX1157        0095 00000030
LKX1158        0095 00000031
LKX1159        0095 00000033
LKX117         0095 00000011
LKX118         0095 00000012
LKX153         0095 00000013
LKX2880        0095 00000036
LKX298         0095 00000014
LKX6525        0095 00000016
LKX6640        0095 00000039
LKX66409       0095 0000003C
LKX6645        0095 0000003A
LKX6761        0095 00000032
LKX6867        0095 00000037
LKX6867H       0095 00000038
LKX844         0095 00000015
 
This information is based on z/VM 7.1.0 Last updated on 22 Jun 2018 at 11:50:28 EDT.
Copyright IBM Corporation, 1990, 2018