SNAX/HLS Management Programming Manual

Standard SNAX/HLS Definitions
Common Definitions
104708 Tandem Computers Incorporated 6–19
ZHLS–VAL–FSM–IMM–RQ–NULL
indicates that this FSM is not yet initialized or is not used in the current
session. Such is the case when the half session uses delayed request mode.
ZHLS–VAL–FSM–IMM–RQ–RESET
indicates that no definite response is owed.
ZFSM–QEC
reports the SNAX/HLS implementation of FSM_QEC. This FSM enforces the
quiesce protocol. The quiesce protocol allows either session partner to stop the
flow of messages from the other partner (HLS–FLOW–CONTROL, operation set to
SM, stop messages).
When this field is in the ZHLS–MAP–STATUS–SESS–SEND token, it pertains to
the partner that sent the QEC (that is, the partner that is trying to quiesce the
other). When this field is in the ZHLS–MAP–STATUS–SESS–RECV token, it
pertains to the partner that receives the QEC (that is, the partner that is being
quiesced).
This field can have the following enumerated values:
ZHLS–VAL–FSM–QEC–NULL
indicates that this FSM is not yet initialized or is not used in the current
session.
ZHLS–VAL–FSM–QEC–P–QC
indicates that the QEC message has been seen, indicating that the sender of the
QEC is asking the partner to stop sending chains. The application program on
the receiving side receives the DT–FLOW–CONTROL (SM) message.
ZHLS–VAL–FSM–QEC–QUIESCED
indicates that the QEC message has been seen, indicating that the session is
now quiesced. In this state, no normal–flow messages can be sent by the
quiesced half session until the partner releases the quiesce operation with the
RELQ request.
ZHLS–VAL–FSM–QEC–RESET
indicates that a quiesce operation is not in progress.
ZFSM–FSM–QRI–CHAIN
is reserved.
ZFSM–SBI
reports the SNAX/HLS implementation of FSM_SBI. This FSM enforces the
stop–bracket–initiation (SBI) protocol. It is used only for LU session type 6.1.