generic: test that linking into a directory fails with EDQUOT

Add a regression test to make sure that unprivileged userspace linking
into a directory fails with EDQUOT when the directory quota limits have
been exceeded.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
2 files changed