Date: Wed, 17 Sep 2014 13:27:13 +0200 From: Simon Toedt <simon.toedt@gmail.com> To: Lionel Cons <lionelcons1972@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: <CAPL6_jTOwxj_t-P6fFWva1FHAHit=T_XOzogf9stUqoS%2BfimZg@mail.gmail.com> In-Reply-To: <CAPJSo4VcRAmMkgQPuuxS33MVMzchqzFfb_Amwxfd1R0MmPpdPg@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> <CAPJSo4VcRAmMkgQPuuxS33MVMzchqzFfb_Amwxfd1R0MmPpdPg@mail.gmail.com>
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On Mon, Sep 15, 2014 at 12:17 PM, Lionel Cons <lionelcons1972@gmail.com> wr= ote: > 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> = wrote: >>> 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=99r= e not likely to >>>>> >> get anyone to want to use them, at which point the whole =E2=80=9C= sharing=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 thoug= ht >>>> 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 co= de?). >>>> (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 t= heir >>>> 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. Our institute volunteers for testing! is there a task or todo list yet? Simon
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