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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure DHDR Directory header block
0000 0 Bitstring 512 DHDRHDR (0) Fixed-length header portion
0000 0 Signed 4 DHDRSIZE The length of the DHDR block in
bytes
The version code for the currently online object
directory has been created to distinguish between the
different styles of the object directory.
Code Description
0 Original format for VM/ESA 1.2.2 and earlier
1 Added index structure for VM/ESA 2.1.0 and higher
2 Added VLDBK as an optional DDEV extension.
If DDEVNIC_VIDCTR > 1 (a complex vidset) then
DDEVNIC_VIDDAS is the DASD page address and
DDEVNIC_VIDDSP is the page offset of a VLDBK.
NOTES : CP does not use the DHDRODVR version code, but
it is supported to allow DIRMAINT and other directory
maintenance utilities to recognize a compatible object
directory.
0004 4 Bitstring 1 DHDRODVR Version code of object directory
00000000 DHDRODV0 X'00' DHDRODV0 VM/ESA 1.2.2 and
prior version of object directory
00000001 DHDRODV1 X'01' DHDRODV1 VM/ESA 2.1.0
version of object directory
00000002 DHDRODV2 X'02' DHDRODV2 z/VM 6.4.0 with
support for the NICDEF VLDBK
extension
0005 5 Bitstring 1 DHDRFLAG Flag Byte
.... ...1 DHDRSSI X'01' DHDRSSI SSI directory flag
.... ..1. DHDRCMOD X'02' DHDRCMOD Compatibility Mode
indicator for debug use.
.... .1.. DHDRSUB1 X'04' DHDRSUB1 DDEVS1 indicator
supported
0006 6 Bitstring 1 * Reserved for IBM use
0007 7 Bitstring 1 DHDRVERS Version code for this block
00000000 DHDRVER0 X'00' DHDRVER0 Initial version
0008 8 Character 16 DHDRLABL Eye catcher - (CL16'DIRECTORY
HEADER')
Note that each of the following fields sometimes
contains storage addresses, not DASD addresses.
DHDRUSER
DHDRUID
DHDRGID
0018 24 Signed 4 DHDRUSER CCPV/PPPV of userid index start
001C 28 Signed 4 DHDRUID CCPV/PPPV of uid index start
0020 32 Signed 4 DHDRGID CCPV/PPPV of gid index start
0024 36 Signed 4 * (5) Reserved for IBM use (good place
for additional index ptrs)
0038 56 Signed 4 DHDRNCBE Count of dir cntrl blck entries
003C 60 Bitstring 128 DHDRDCRY Bit map for dedicated AP crypto
queues. This field is maintained
for compatibility and should only
be used if DHDRCRM1/DHDRCRM2 are
zero or if the object directory
is being used by a level of CP
that does not support the Crypto
APXA facility.
Note that the fields from DHDRLUSE through DHDRVLD
are not used by CP. They are used by Dirmaint and
the relative offsets of these fields should not
change. Therefore new fields must not be inserted.
New fields should be allocated using the reserved
areas for these specific fields.
Notes : CP does not set or maintain these fields.
00BC 188 Signed 4 DHDRLUSE CCPV/PPPV of last page used
00C0 192 Signed 4 DHDRLDUN CCPV/PPPV of last DUNDX page
00C4 196 Signed 4 DHDRLUID CCPV/PPPV of last UID page
00C8 200 Signed 4 DHDRLGID CCPV/PPPV of last GID page
00CC 204 Signed 4 DHDRLVMD CCPV/PPPV of last DVMD page
00D0 208 Signed 4 DHDRLCPU CCPV/PPPV of last DCPU page
00D4 212 Signed 4 DHDRLDEV CCPV/PPPV of last DDEV page
00D8 216 Signed 4 DHDRLIUC CCPV/PPPV of last IUCV page
00DC 220 Signed 4 DHDRLNSA CCPV/PPPV of last NSA page
00E0 224 Signed 4 DHDRLAPC CCPV/PPPV of last APPC page
00E4 228 Signed 4 DHDRLGFD CCPV/PPPV of last DGFBK page
00E8 232 Signed 4 DHDRLDGS CCPV/PPPV of last DGSBK page
00EC 236 Signed 2 DHDRODUN Offset to next DUNDX slot
00EE 238 Signed 2 DHDROUID Offset to next UID slot
00F0 240 Signed 2 DHDROGID Offset to next GID slot
00F2 242 Signed 2 DHDROVMD Offset to next DVMD slot
00F4 244 Signed 2 DHDROCPU Offset to next DCPU slot
00F6 246 Signed 2 DHDRODEV Offset to next DDEV slot
00F8 248 Signed 2 DHDROIUC Offset to next IUCV slot
00FA 250 Signed 2 DHDRONSA Offset to next NSA slot
00FC 252 Signed 2 DHDROAPC Offset to next APPC slot
00FE 254 Signed 2 DHDROGFD Offset to next DGFBK slot
0100 256 Signed 2 DHDRODGS Offset to next DGSBK slot
0102 258 Signed 2 DHDRODID Offset to next DIDBK slot
0104 260 Signed 2 DHDROVLD Offset to next VLDBK slot
0106 262 Signed 2 * Reserved for IBM use (offset)
0108 264 Signed 2 * Reserved for IBM use (offset)
010A 266 Signed 2 * Reserved for IBM use (offset)
010C 268 Signed 4 DHDRLDID CCPV/PPPV of last DIDBK page
0110 272 Signed 4 DHDRCRM1 CCPV/PPPV of page containing the
dedicated bit map for Crypto APs
0-127.
0114 276 Signed 4 DHDRCRM2 CCPV/PPPV of page containing the
dedicated bit map for Crypto APs
128-255.
0118 280 Signed 4 DHDRLVLD CCPV/PPPV of last VLDBK page
011C 284 Signed 4 * Reserved for IBM use (CCPV/PPPV)
0120 288 Signed 4 * Reserved for IBM use (CCPV/PPPV)
0124 292 Signed 4 * (51) Reserved for IBM use
01F0 496 Character 8 DHDRVRMS (0) Associated DIRECTXA CP Level
01F0 496 Character 4 DHDRRMV (0) Rel/Mod/Version
01F0 496 Character 2 DHDRRM Release/Mod Level
01F2 498 Character 2 DHDRV Version
01F4 500 Character 4 DHDRS Service Level
01F8 504 Character 6 DHDRSRES &SYSRES substitution value
01FE 510 Bitstring 2 * Reserved for IBM use
00000200 DHDRLEN (*-DHDR) Size of fixed-length
portion of the DHDR, in bytes
00000040 DHDRSZ (*-DHDR+7)/8 Size of fixed-length
portion of the DHDR, in
doublewords
The directory control block table (DHDRDCBT)
contains the DHDRDCBE entries for each control
block in the object directory. The order of the
DHDRDCBE entries in the table must be the same as
the order of the directory control block IDs
defined in DHDRDCBI.
0200 512 Dbl-Word 8 DHDRDATA (0) Variable-length portion of DHDR
0200 512 Dbl-Word 8 DHDRDCBT (0) Directory control block table
(starts at offset X'200')
0200 512 Character 16 DHDRDCBE (0) Dir control block table entry
0200 512 Signed 4 DHDRDCBS Size (in bytes) of the cntrl blck
0204 516 Bitstring 1 DHDRDCBV Version code for this cntrl blck
00000000 DHDRCBV0 X'00' DHDRCBV0 Initial version
0205 517 Bitstring 1 DHDRDCBF Directory control block flag
00000000 DHDRINIT X'00' DHDRINIT Init flag of this
dir CB
00000080 DHDRIDGD X'80' DHDRIDGD The block is
contained in DGDBK
0206 518 Signed 2 DHDRDCBI Directory contrl block IDs
00000001 DHDRDHDR 1 DHDRDHDR DHDR ID
00000002 DHDRDNX1 2 DHDRDNX1 DNXBK ID for USER 1st
level index
00000003 DHDRDNX2 3 DHDRDNX2 DNXBK ID for USER 2nd
level index
00000004 DHDRDNX3 4 DHDRDNX3 DNXBK ID for UID 1st
level index
00000005 DHDRDNX4 5 DHDRDNX4 DNXBK ID for UID 2nd
level index
00000006 DHDRDNX5 6 DHDRDNX5 DNXBK ID for GID index
00000007 DHDRDUND 7 DHDRDUND DUNDX ID
00000008 DHDRDVMD 8 DHDRDVMD DVMD ID
00000009 DHDRDDEV 9 DHDRDDEV DDEV ID
0000000A DHDRDCPU 10 DHDRDCPU DCPU ID
0000000B DHDRDNSA 11 DHDRDNSA DNSA ID
0000000C DHDRDAPP 12 DHDRDAPP DAPPC ID
0000000D DHDRDIUC 13 DHDRDIUC DIUCV ID
0000000E DHDRDGDB 14 DHDRDGDB DGDBK ID
0000000F DHDRDGRP 15 DHDRDGRP DGRPM ID
00000010 DHDRDGSB 16 DHDRDGSB DGSBK ID
00000011 DHDRDSGR 17 DHDRDSGR DSGR ID
00000012 DHDRDBGF 18 DHDRDBGF DGFBK ID
00000013 DHDRDDID 19 DHDRDDID DIDBK ID
00000014 DHDRVLD 20 DHDRVLD VLDBK ID
Notes : In order to avoid changing the existing
directory control block IDs in DHDRCBI, the
new ID should be added at the end with the
number of the last directory control block
ID in DHDRDCBI plus one.
0208 520 Dbl-Word 8 * Reserved field
0210 528 Character 16 DHDRNXTE (0) Next dir cntrl blck table entry
**** THE VALUE OF FSMAXB FOR DATAMAP IS 4072
000000DE DHDRMXTE (FSMAXB-DHDRLEN)/L'DHDRDCBE
Maximum number of dir control
block table entries
00000DE0 DHDRMXLN (DHDRMXTE*L'DHDRDCBE) Maximum
length of DHDRDCBT
00000FE0 DHDRMXBS (DHDRLEN+DHDRMXLN) Maximum DHDR
size in bytes
000001FC DHDRMXDS (DHDRMXBS+7)/8 Maximum DHDR size
in DBs
00000000 DHDRVLEN 0 Length zero for variable len CB
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