[Unionfs] unionfs 1.6 release

[Beyerle Urs]

Erez Zadok wrote:
> In message <1183534815.3949.9.camel at dhcp0-83.sw.ru>, Vasily Tarasov writes:
>> On Wed, 2007-07-04 at 03:24 -0400, Erez Zadok wrote:
>>> In message <1183467925.3654.14.camel at dhcp0-167.sw.ru>, Vasily Tarasov writes:
>>>> Hello everybody,
>>>>
>>>> Can you tell me, please, is there ETA for unionfs 1.6 (against 2.6.20
>>>> kernel)? It's marked as "coming soon" on the web-site...
>>>>
>>>> Thank you,
>>>> Vasily.
>>> Vasily, we've done even better: we've back-ported Unionfs 2.0 to 2.6.20 (as
>>> well as 2.6.19, 2.6.18, and 2.6.21).  See
>>> <http://unionfs.filesystems.org/>.   Please let us know how well these
>>> back-ports work for you.
>>>
>>> Cheers,
>>> Erez.
>> Thank you, Erez. However we needed Unionfs 1.0. :)
>>
>> The thing is that we're creating OpenVZ (openvz.org) LiveCD, that will
>> able to boot from several kernels: 2.6.9, 2.6.18 and 2.6.20. The LiveCD
>> uses unionctl tool and it works great for 2.6.9/2.6.18 kernels, because
>> we use unionfs 1.0 for these kernels. But unionfs 2.0, that is only
>> available for 2.6.20 kernel, doesn't support ioctls that unionctl
>> produces. :)
> 
> Do you mean the branch-management ioctls?  If that's the only difference, we
> can work around it easily (wrapper scripts, for example).  Or did you write
> programs that use the ioctl(2) syscall directly?
> 
> The branch-management ioctls in 1.0 were really racy; the remount-based
> branch-management is not just race free, but also the "approved" way that
> the kernel folks prefer.
> 
> Unionfs 2.0 has so much new stuff, not to mention fixes; perhaps you'd
> consider using 2.0 for kernels 2.6.18 and higher, and special case 2.6.9?
> 

Does this mean that unionfs 2.0 should work for 2.6.9 kernel ???


> Or maybe I'll now have to see if we can backport the 2.6.18 code to 2.6.9?
> That's going to be an interesting adventure. :-)


I'm still looking forward for a stable unionfs version for 2.6.9 RHEL kernel! Any work on 
this would be very much appreciated!!

Cheers,

	Urs