Date: Fri, 12 Sep 2014 02:24:12 +0200 From: Lionel Cons <lionelcons1972@gmail.com> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: Freebsd hackers list <freebsd-hackers@freebsd.org>, Simon Toedt <simon.toedt@gmail.com>, Jordan Hubbard <jkh@ixsystems.com>, Richard Yao <ryao@gentoo.org>, Jan Bramkamp <crest@rlwinm.de> Subject: Re: Tool to access ZFS/NFSv4 alternate data streams on FreeBSD? Message-ID: <CAPJSo4WiZm7peHL7g0C-XbADhWip2q7H5k7=%2BFnm4yzw4EJ0Pw@mail.gmail.com> In-Reply-To: <220565922.34288992.1410298180362.JavaMail.root@uoguelph.ca> References: <CAPL6_jR8O4W6Ad_yDR_khJvUV-mgsDW1AM7aWF=K3JTfA9AiYg@mail.gmail.com> <220565922.34288992.1410298180362.JavaMail.root@uoguelph.ca>
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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 n= ot likely to >> >> get anyone to want to use them, at which point the whole =E2=80=9Csha= ring=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 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 thei= r > 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. Lionel
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