Described are techniques for obtaining configuration information and
conditionally executing a system call in accordance with a specified
configuration state. A host issues a request for configuration
information from a data storage system. The data storage system maintains
a separate table of configuration information representing a
configuration state of the data storage system. The host receives a
response including a custom value indicating the current configuration
state. The host may issue a request to the data storage system to
conditionally execute a call if the data storage system is in a
configuration state corresponding to the custom value.