generic/571: skip test if locktest -t on NFS returns EAGAIN
As kernel commit
e93a5e9306a5 ("NFSv4: Add support for application
leases underpinned by a delegation") describes, NFS now supports
file leases only after delegations. However, fstests lacks many NFS
functionalities including delegation.
So let's skip generic/571 if locktest -t on NFS returns EAGAIN
because of commit
df2c7b951f43 ("NFSv4: setlease should return
EAGAIN if locks are not available").
Signed-off-by: Su Yue <suy.fnst@fujitsu.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>