tree ed20b210bb554f283d8458ee6d146a5c4439e37f
parent a364bc0b37f14ffd66c1f982af42990a9d77fa43
author Steve French <sfrench@us.ibm.com> 1224736957 +0000
committer Steve French <sfrench@us.ibm.com> 1224736957 +0000

[CIFS] improve setlease handling

fcntl(F_SETLEASE) currently is not exported by cifs (nor by local file
systems) so cifs grants leases based on how other local processes have
opened the file not by whether the file is cacheable (oplocked).  This
adds the check to make sure that the file is cacheable on the client
before checking whether we can grant the lease locally
(generic_setlease).  It also adds a mount option for cifs (locallease)
if the user wants to override this and try to grant leases even
if the server did not grant oplock.

Signed-off-by: Steve French <sfrench@us.ibm.com>