EXCEPTION CONDITION DETERMINATION AT A CONTROL UNIT IN AN I/O PROCESSING SYSTEM
First Claim
1. A computer program product for providing exception condition feedback at a control unit to a channel subsystem in an input/output (I/O) processing system, the computer program product comprising:
- a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising;
receiving a command message at the control unit from the channel subsystem;
detecting an exception condition in response to unsuccessful execution of at least one command in the command message;
identifying a termination reason code associated with the exception condition;
writing the termination reason code to a response message; and
sending the response message to the channel subsystem.
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Accused Products
Abstract
A computer program product, apparatus, and method for providing exception condition feedback at a control unit to a channel subsystem in an I/O processing system are provided. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method. The method includes receiving a command message at the control unit from the channel subsystem, and detecting an exception condition in response to unsuccessful execution of at least one command in the command message. The method further includes identifying a termination reason code associated with the exception condition, writing the termination reason code to a response message, and sending the response message to the channel subsystem.
166 Citations
25 Claims
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1. A computer program product for providing exception condition feedback at a control unit to a channel subsystem in an input/output (I/O) processing system, the computer program product comprising:
a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising; receiving a command message at the control unit from the channel subsystem; detecting an exception condition in response to unsuccessful execution of at least one command in the command message; identifying a termination reason code associated with the exception condition; writing the termination reason code to a response message; and sending the response message to the channel subsystem. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for providing exception condition feedback in an input/output (I/O) processing system, the apparatus comprising:
a control unit in communication with a channel subsystem, the control unit performing a method comprising; receiving a command message at the control unit from the channel subsystem; detecting an exception condition in response to unsuccessful execution of at least one command in the command message; identifying a termination reason code associated with the exception condition; writing the termination reason code to a response message; and sending the response message to the channel subsystem. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for providing exception condition feedback at a control unit to a channel subsystem in an input/output (I/O) processing system, the method comprising:
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receiving a command message at the control unit from the channel subsystem; detecting an exception condition in response to unsuccessful execution of at least one command in the command message; identifying a termination reason code associated with the exception condition; writing the termination reason code to a response message; and sending the response message to the channel subsystem. - View Dependent Claims (22, 23, 24, 25)
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Specification