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Date:      Sat, 23 Nov 2013 09:05:01 -0500
From:      Pedro Giffuni <pfg@FreeBSD.org>
To:        Cedric Blancher <cedric.blancher@gmail.com>
Cc:        Freebsd hackers list <freebsd-hackers@freebsd.org>, Richard Yao <ryao@gentoo.org>
Subject:   Re: O_XATTR support in FreeBSD?
Message-ID:  <5290B60D.2050006@FreeBSD.org>
In-Reply-To: <CALXu0UeDprsYibGoUQ-k_R-3_X6WoVkC_E9_9BkBwBo6aB-Zbg@mail.gmail.com>
References:  <528FB6BA.7040606@FreeBSD.org> <CALXu0UeDprsYibGoUQ-k_R-3_X6WoVkC_E9_9BkBwBo6aB-Zbg@mail.gmail.com>

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On 23.11.2013 02:13, Cedric Blancher wrote:
> On 22 November 2013 20:55, Pedro Giffuni <pfg@freebsd.org> wrote:
>> Well ...
>>
>> According to:
>>
>> https://wiki.freebsd.org/ZFS
>>
>> We do support Extended Attributes on ZFS but they differ from the ones in
>> Solaris (and Linux).
> Well, we need the one specified in the NFSv4 standard. The Linux
> extended attributes are pretty much useless because they are size
> restricted (typical attribute size here is in the GB range, and for
> example NIH and CERN have even much bigger sizes), can't be accessed
> like normal files and are incompatible to Window's Alternate Streams.
>
> Ced

I was unaware of a standard for EA beyond the old posix draft.
The reason for Extended Attributes is supporting ACL and we support both 
the draft posix and the NFS/win style ACLs.

Not sure about the status of NFSv4. The guys in the posix-1e list should 
know better.

regards,

Pedro.



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