How do I know my UBI/UBIFS code version?

Woody Wu
2014-10-10T14:58:29Z

I am running ubi/ubifs on a ported ARM linux 3.1.x. How do I get know my ubi/ubifs version? In additional, if I found the version are too old, could I simply copy a newer version source files to my 3.1 ARM linux tree?

Thanks in advance.

-woody, sent from mobile