32-bit getdents(2) calls fail

Issue

• Our storage admins are reporting that the getdents(2) call returns incorrect data in 32-bit mode, and actually throws an error when called against a large Isilon NFS filesystem.

• The following shows 32-bit getdents throwing an error on a large Isilon filesystem, and strace showing the 32-bit getdent returning incorrect numbers of entities in almost all situations. Note the d_reclen==0 assertion.