I'm also not aware of a file-indexing solution that's provided by NetApp. I did just see a demo of the Syncsort ECX product that will index file names and locations, but not the contents of the files. The Syncsort rep did mention using the NetApp API.
Building a file content index for something similar to a Google search is an entirely different problem. Usually built into a SharePoint solution using FAST or SharePoint 2013.
Also, I'm not an employee or have any affiliation to Syncsort.
Best of luck,
Mark O'Pella
Systems Architect
Rosetta Resources