Re: [Libguestfs] [nbdkit PATCH v2 4/5] python: Expose FUA support

+=item C<can_fua> + +(Optional) + + def can_fua(h): + # return a boolean + +Unlike the C counterpart, the Python callback does not need a +tri-state return value, because Python introspection is sufficient to +learn whether callbacks support FUA. Thus, this function only returns +a bool, which merely controls whether Forced Unit Access (FUA) support +is advertised to the client on a per-connection basis. If omitted or +this returns true, FUA support is advertised as native if any of the +C<pwrite>, C<zero>, or C<trim> callbacks support an optional parameter +C<fua>; or as emulated if there is a C<flush> callback.