Currently, debugfs "stat" will print out some of the xattrs, such as "lma" and "fid", but it does not print out "lov" or "link" xattrs, not even a hex dump.

It probably makes sense for "stat" to print out all of the xattrs, maybe with a new -x option, at least in hex format, so that it is possible to see what is stored in each one. Better still would be printing a decoded form of the xattr. This could be extended to print out decoded ACLs also, which would be useful for upstream submission.