The RACROUTE REQUEST=AUTH preprocessing exit routine must be named ICHRCX01.

This exit must be reentrant and is invoked in supervisor state, with protection key 0, with no locks held. The exit can have any RMODE, but AMODE should be AMODE(31) or AMODE(ANY) for the best use of virtual storage and best RACF® performance.

When the RACROUTE REQUEST=AUTH preprocessing exit receives control for the DATASET class, RACF has already processed the naming convention table, if there is one, and if the profile name was changed by the table then this exit is passed the modified profile name.

z/OS Security Server RACF Data Areas contains a mapping of the RACROUTE REQUEST=AUTH exit parameter list, RCXP.