• J. Bruce Fields's avatar
    nfs: disable leases over NFS · 370f6599
    J. Bruce Fields authored
    As Peter Staubach says elsewhere
    (http://marc.info/?l=linux-kernel&m=118113649526444&w=2):
    
    > The problem is that some file system such as NFSv2 and NFSv3 do
    > not have sufficient support to be able to support leases correctly.
    > In particular for these two file systems, there is no over the wire
    > protocol support.
    >
    > Currently, these two file systems fail the fcntl(F_SETLEASE) call
    > accidentally, due to a reference counting difference.  These file
    > systems should fail more consciously, with a proper error to
    > indicate that the call is invalid for them.
    
    Define an nfs setlease method that just returns -EINVAL.
    
    If someone can demonstrate a real need, perhaps we could reenable
    them in the presence of the "nolock" mount option.
    Signed-off-by: default avatar"J. Bruce Fields" <bfields@citi.umich.edu>
    Cc: Peter Staubach <staubach@redhat.com>
    Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
    370f6599
file.c 15.2 KB