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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure IVLBK IVL Domain Member Table
0000 0 Dbl-Word 8 IVLHLOCK (3) IVLBK Header Lock-word
0018 24 Dbl-Word 8 IVLCLBST (0) Start displacement for block
clear
0018 24 Character 8 * Reserved for future IBM Use
0020 32 Bitstring 6 IVLHMAC (0) Domain Multicast MAC Address
0020 32 Bitstring 5 IVLHMACH Start of MAC Address
0025 37 Bitstring 1 IVLHMACX Last byte of Domain MAC Address
*----- End of MAC Address
0026 38 Character 1 IVLHDOM Domain Membership letter (A-H)
0027 39 Bitstring 1 IVLHLAST Index to last IVL Member Entry
0028 40 Dbl-Word 8 IVLHDCAP Domain level IVL Capability bits
Represents the least common
denominator of capabilities of
all current domain members.
.... .... IVLCAPDH X'80000000' High half: Base
Capability Level
.... .... IVLCAPCH X'40000000' High half:
Collaborative Load balancing
supported
00004000 IVLCAPCO X'4000' High half half: Collab.
LB support
.... .... IVLCAPPH X'C0000000' High half: Base plus
collaborative load balancing
.... .... IVLCAPDL X'00000000' Low half: Base
Capability Level
Represents the highest possibile
capability for the local z/VM
image.
0030 48 Bitstring 4 IVLHSRV Maintenance Level ID
0034 52 Signed 2 IVLHHBTO IVL Heartbeat Timeout
0036 54 Signed 2 IVLHVLAN IVL VLAN, or 0 if no IVL VLAN
0038 56 Address 4 IVLHLAN Pointer to LANBK for IVL Virtual
Switch
003C 60 Signed 4 IVLHTOK Counter used to generate tokens
for SEND_REQUESTs
Active SEND_REQUEST Queue
The Active SEND_REQUEST Queue is a cyclic list of SRQBKs.
The anchor points to the newest SRQBK on the list.
Whereas the anchored SRQBK's next pointer is the next most
recent SRQBK on the list and its previous pointer links to
the longest outstanding SRQBK on the list.
SRQBK B
+--->+----------+<---+
| | SRQ_NEXT | |
| | C | |
SRQBK A | +----------+ |
+---------+ +----------+<---+ | SRQ_PREV | |
| IVLHSRQ |---->| SRQ_NEXT | | A | |
| A | | B | +----------+ |
+---------+ +----------+ | | |
| SRQ_PREV | |
| C | |
+----------+<---+ | | |
| | | +----------+ |
Newest | |
| | | SRQBK C |
+----------+ +--->+----------+<---+
| SRQ_NEXT |
| A |
+----------+
| SRQ_PREV |
| B |
+----------+
| |
Oldest
| |
+----------+
Serialization: IVLHSRQ, IVLHALL, IVLHFLAG and IVLHREAS
are serialized by the IVL COM Lock and
NOT the IVL Header Lock.
0040 64 Address 4 IVLHSRQ Active SEND_REQUEST Queue
0044 68 Signed 2 IVLHALL Mask of ALL currently active IVL
Domain Members
0046 70 Bitstring 1 IVLHFLGA IVL Communication Flags
00000080 IVLHFENC X'80' IVLHFENC Local IVL Member
FENCED from Domain
00000040 IVLHIDIS X'40' IVLHIDIS IVL Discovery
Initiated after IPL
0047 71 Bitstring 1 * Reserved for future IBM use
0048 72 Signed 4 IVLHREAS FENCED Reason Message Number
004C 76 Address 4 IVLHNPBK IVL NIC Port Block L:Address
0050 80 Dbl-Word 8 IVLHDTX Count of messages sent when the
target address is the IVL Domain
MAC address.
0058 88 Dbl-Word 8 IVLHMRX Count of messages received when
the target address is the local
system's IVL Handler MAC address.
0060 96 Dbl-Word 8 IVLHDRX Count of messages received when
the target address is the IVL
Domain MAC address.
0068 104 Dbl-Word 8 IVLHRXDSC Count of replies received and
discarded because no matching
SRQBK was found and the source
MAC did not match a current IVL
Domain member.
0070 112 Bitstring 1 IVLHDMCT Count of of duplicate MAC warning
messages.
0071 113 Bitstring 7 * Reserved for future IBM use
0078 120 Dbl-Word 8 * (39) Reserved for Future IBM Use
Important NOTES : IVLBK Size Restriction
The size of the IVLBK fixed header and the size of the 16
table entries can't exceed 4016 bytes. Therefore, you
can't increase the size of either the header or a table
entry. All new fields must be allocated from reserved
space only.
01B0 432 Dbl-Word 8 * (0)
01B0 432 Bitstring 3584 IVLHMEMB Reserve space for maximum sized
member table.
000001F6 IVLHSIZ (*-IVLBK+7)/8 Size in double
words
00000FB0 IVLHBSIZ IVLHSIZ*8 Size in bytes
000001F3 IVLCSIZ (*-IVLCLBST+7)/8 Clear size in
double words
00000F98 IVLCLSIZ IVLCSIZ*8 Clear Size in bytes
IVL Domain Member Table Entry
The first IVL Member Table Entry is ALWAYS for the local
host.
Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure IVLMBK IVL Domain Member Table
Define the common area of the IVL Member Table Entry
0000 0 Dbl-Word 8 IVLMLOCK (3) Member entry lock
0018 24 Character 8 IVLMNAME Member EBCDIC System Name
0020 32 Bitstring 6 IVLMMAC (0) Unicast MAC address local Manager
0020 32 Bitstring 3 IVLMMACP MAC Address Prefix
0023 35 Bitstring 3 IVLMMACS MAC Address Suffix *----- End of
MAC Address
0026 38 Bitstring 1 IVLMSTAT Member Host IVL Handler State
machine representing the local
system's view of the remote host
00000000 IVLMSTAT_INACTIVE
X'00' IVLMSTAT_INACTIVE - Member
is inactive
00000020 IVLMSTAT_LEAVING
X'20' IVLMSTAT_LEAVING - Member
is leaving (tran state) IVLMSTAT
> x'4F' indicates different
active host states
00000050 IVLMSTAT_ERROR X'50' IVLMSTAT_ERROR - Member is
in an error sta
00000060 IVLMSTAT_PENDING
X'60' IVLMSTAT_PENDING - Member
is in pending jo (transitional
state)
000000F0 IVLMSTAT_ACTIVE
X'F0' IVLMSTAT_ACTIVE - Active
IVL Member
0027 39 Bitstring 1 IVLMEUSE Member Entry validity
00000000 IVLMEUSE_UNUSED
X'00' IVLMEUSE_UNUSED - Member
entry is not in u
00000001 IVLMEUSE_INUSE X'01' IVLMEUSE_INUSE - Member
entry is in use
0028 40 Character 4 IVLMSRV Maintenance Level ID
002C 44 Signed 4 IVLMHBCT IVL Heartbeat Counter
0030 48 Dbl-Word 8 IVLMCAP Member IVL Capability bits
Represents the highest possibile
capability for the member.
0038 56 Dbl-Word 8 IVLMTX Count of messages sent using the
MAC address of the member host's
IVL Handler.
0040 64 Dbl-Word 8 IVLMRX Count of messages received using
MAC address of the member host's
IVL Handler.
0048 72 Dbl-Word 8 IVLMRXDSC Count of replies received and
discarded because no matching
SRQBK was found.
0050 80 Signed 2 IVLMMASK Member mask
0052 82 Bitstring 1 IVLMFLGA IVL Manager Processing Flags
1... .... IVLMRECV X'80' IVLMRECV HeartBeat Recovery
Task Active
0053 83 Bitstring 1 * Reserved for future IBM use
0054 84 Signed 4 * Reserved for future IBM use
0058 88 Dbl-Word 8 * (17) Reserved for Future IBM Use
Important NOTES : IVLBK Size Restriction
The size of the IVLBK fixed header and the size of the 16
table entries can't exceeded 4016 bytes. Therefore, you
can't increase the size of either the header or a table
entry. All new fields must be allocated from reserved
space only.
0000001C IVLMSIZE (*-IVLMBK+7)/8 Size in double
words
000000E0 IVLMBSIZ IVLMSIZE*8 Size in bytes
Define the IVLS_EVENT Structure
This is used to map the data to be recorded for
*VMEVENT events VMEIVLJN and VMEIVLLF.
Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure IVLS_EVENT IVL Domain Member Table
0000 0 Character 8 IVLS_SYSID Local System ID
0008 8 Bitstring 1 IVLS_DOMAIN IVL Domain
0009 9 Bitstring 1 IVLS_FLAG Flags
1... .... IVLS_JOIN X'80' IVLS_JOIN Local System
JOINed IVL Domain
.1.. .... IVLS_LEFT X'40' IVLS_LEFT Local System LEFT
IVL Domain
000A 10 Bitstring 6 * Reserved for future IBM Use
00000002 IVLS_EVSZ (*-IVLS_EVENT+7)/8 Size of
IVLS_EVENT in DWs
00000010 IVLS_EVSZB IVLS_EVSZ*8 Size of IVLS_EVENT in
bytes
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