Date: Tue, 26 Nov 2013 18:34:23 +0100 From: Cedric Blancher <cedric.blancher@gmail.com> To: Matthew Fleming <mdf@freebsd.org> Cc: Rick Macklem <rmacklem@uoguelph.ca>, Freebsd hackers list <freebsd-hackers@freebsd.org>, Richard Yao <ryao@gentoo.org>, Pedro Giffuni <pfg@freebsd.org>, Jordan Hubbard <jordan.hubbard@gmail.com>, Lionel Cons <lionelcons1972@gmail.com> Subject: Re: Alternate Data Stream Support in FreeBSD (was Re: O_XATTR support in FreeBSD?) Message-ID: <CALXu0Ufkn-mtS5sUYJEE4AHL0wHa4bhQdhwOf9LM5Npf6qycTg@mail.gmail.com> In-Reply-To: <CAMBSHm-JuCJCKqG%2B05jrQ=3aRb7=t6meJGBT8bfrBgv222RwoQ@mail.gmail.com> References: <CAPJSo4XFNxZLPG=uvZkCdhOX08Wt_JqNCAOV-Eg58pw0U%2BsavQ@mail.gmail.com> <1934C2F2-C380-4689-A811-61BB0009BA6B@gmail.com> <CAMBSHm-JuCJCKqG%2B05jrQ=3aRb7=t6meJGBT8bfrBgv222RwoQ@mail.gmail.com>
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On 26 November 2013 18:17, Matthew Fleming <mdf@freebsd.org> wrote: > On Tue, Nov 26, 2013 at 9:08 AM, Jordan Hubbard <jordan.hubbard@gmail.com= > > wrote: >> >> >> On Nov 26, 2013, at 4:27 AM, Lionel Cons <lionelcons1972@gmail.com> wrot= e: >> > Could we first agree what we are talking about, please? I'm a bit new >> > to this thread, but AFAIK we are talking about the Windows Alternate >> > Data Streams as they appear in networked filesystem like NFSv4 and >> > CIFS and physical filesystems like NTFS, ZFS and Solaris UFS, right? >> > ACLs have no direct relation to those streams. >> >> Actually, I didn=92t think we were talking about alternate data streams >> myself. Conceptually they=92re equivalent, I guess, but I=92ve always t= hrough >> they were somewhat overkill and I=92ve yet to encounter an application t= hat >> seriously uses them. > > > Anyone implementing a SMB/CIFS filesystem on top of FreeBSD (e.g. a vendo= r) > will need to come up with support for ADS. Whether or not any "FreeBSD" > application has use for them is maybe beside the point -- vendors have a = use > for support. Though probably every vendor who wants them has already cod= ed > their own variant. +1 BTW: FreeBSD uses ZFS as main file system, and ZFS has native O_XATTR support (aka Alternate Data Streams). How hard is it to add O_XATTR, VFS_XATTR and FXATTR in the FreeBSD vfs layer? Ced --=20 Cedric Blancher <cedric.blancher@gmail.com> Institute Pasteur
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