Tool to access ZFS/NFSv4 alternate data streams on FreeBSD?

[Lionel Cons]

On 12 September 2014 17:47, Simon Toedt <simon.toedt at gmail.com> wrote:
> On Fri, Sep 12, 2014 at 2:24 AM, Lionel Cons <lionelcons1972 at gmail.com> wrote:
>> On 9 September 2014 23:29, Rick Macklem <rmacklem at uoguelph.ca> wrote:
>>> Simon Toedt wrote:
>>>> On Tue, Sep 9, 2014 at 1:47 PM, Rick Macklem <rmacklem at uoguelph.ca>
>>>> wrote:
>>>> > Jordan Hubbard wrote:
>>>> >> Yep.  I was just describing the experience that OS X went through
>>>> >> in
>>>> >> implementing extattrs / legacy resource fork support.  To recap it
>>>> >> very briefly:  Having NFSv4 support extattrs (or even named
>>>> >> streams,
>>>> >> if you want to go that far) is the comparatively easy part.  It’s
>>>> >> backing them up / copying them around that gets more involved, and
>>>> >> if you can’t back up certain attributes then you’re not likely to
>>>> >> get anyone to want to use them, at which point the whole “sharing”
>>>> >> aspect kind of takes a back seat.
>>>> >>
>>>> > Yep. I strongly suspect you are correct.
>>>> >
>>>> > The question then becomes:
>>>> > - Do we wait and see if someone chooses to get around to doing all
>>>> >   the hard userland work.
>>>>
>>>> Solaris tools already have support for this. Also AT&T AST from David
>>>> Korn have support for O_XATTR, too.
>>>>
>>> Hopefully others will correct me if I have this incorrect, but I thought
>>> CDDL code could only be used for optional components of FreeBSD?
>>> I suspect tar and friends are considered core components and that code
>>> for this would have to be written by someone (ie. couldn't use CDDL code?).
>>> (I'm assuming that these tools are in OpenSolaris.)
>>
>> I don't think you FreeBSD should *copy* the code. But it can be used
>> for reference how the extended tar headers for filesystem forks should
>> look like. That's all.
>>
>>>
>>> Be aware that most of FreeBSD's development is done by volunteers in their
>>> spare time, so I have no idea if someone is interested in doing this.
>>
>> If anyone can get the kernel parts I think we can sponsor someone to
>> do the userland work.
>
> How much money would CERN offer? :)
>
> Simon

Depends. First I need to have more support (2nd funding pillar) and
then write a proposal. Short: Paperwork. Long: More paperwork.
But given the number of projects here which rely on O_XATTR there
isn't a way around it so funding should be easy to obtain.

Lionel