ZFS and __FreeBSD_version
John Baldwin
jhb at FreeBSD.org
Fri May 14 11:53:24 UTC 2010
Pawel Jakub Dawidek wrote:
> On Thu, May 13, 2010 at 07:44:52AM -0400, John Baldwin wrote:
>> Boris Kochergin wrote:
>>> Hi. Can __FreeBSD_version be bumped if ZFS's userland API is ever
>>> changed again? I got slightly bitten by the
>>> state_to_name()-to-zpool_state_to_name() change from version 6 to
>>> version 13 and would like a reliable way of keeping track of this type
>>> of stuff in the future. Thanks.
>> Yes, it should be bumped anytime the API changes. That is definitely a
>> bug that it wasn't done properly last time.
>
> I must disagree here. libzfs API is for ZFS internal use only and is
> subject to change at any time. This is true for OpenSolaris as well.
> We, of course, can bump __FreeBSD_version if it helps, but one shouldn't
> expect libzfs API being stable or there is any care taken to maintain
> backward compatibility.
Err, I did not say that the API should be stable, but if it is going to
change we should bump __FreeBSD_version so that external software can
cope via #ifdef's. Version bumps are cheap in stable branches.
--
John Baldwin
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