Date: Mon, 15 Sep 2014 12:17:41 +0200 From: Lionel Cons <lionelcons1972@gmail.com> To: Simon Toedt <simon.toedt@gmail.com> Cc: Freebsd hackers list <freebsd-hackers@freebsd.org>, Richard Yao <ryao@gentoo.org>, Rick Macklem <rmacklem@uoguelph.ca>, Jordan Hubbard <jkh@ixsystems.com>, Jan Bramkamp <crest@rlwinm.de> Subject: Re: Tool to access ZFS/NFSv4 alternate data streams on FreeBSD? Message-ID: <CAPJSo4VcRAmMkgQPuuxS33MVMzchqzFfb_Amwxfd1R0MmPpdPg@mail.gmail.com> In-Reply-To: <CAPL6_jSDprYLcORxouncT_ibTrdTaXv8hLyK7RFtj4u8JrWhbQ@mail.gmail.com> References: <CAPL6_jR8O4W6Ad_yDR_khJvUV-mgsDW1AM7aWF=K3JTfA9AiYg@mail.gmail.com> <220565922.34288992.1410298180362.JavaMail.root@uoguelph.ca> <CAPJSo4WiZm7peHL7g0C-XbADhWip2q7H5k7=%2BFnm4yzw4EJ0Pw@mail.gmail.com> <CAPL6_jSDprYLcORxouncT_ibTrdTaXv8hLyK7RFtj4u8JrWhbQ@mail.gmail.com>
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On 12 September 2014 17:47, Simon Toedt <simon.toedt@gmail.com> wrote: > On Fri, Sep 12, 2014 at 2:24 AM, Lionel Cons <lionelcons1972@gmail.com> w= rote: >> On 9 September 2014 23:29, Rick Macklem <rmacklem@uoguelph.ca> wrote: >>> Simon Toedt wrote: >>>> On Tue, Sep 9, 2014 at 1:47 PM, Rick Macklem <rmacklem@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=E2= =80=99s >>>> >> backing them up / copying them around that gets more involved, and >>>> >> if you can=E2=80=99t back up certain attributes then you=E2=80=99re= not likely to >>>> >> get anyone to want to use them, at which point the whole =E2=80=9Cs= haring=E2=80=9D >>>> >> 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 though= t >>> 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 cod= e?). >>> (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 th= eir >>> 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
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