Date: Wed, 20 Apr 2011 17:45:58 -0400 (EDT) From: Rick Macklem <rmacklem@uoguelph.ca> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: question on extended attributes Message-ID: <1319015176.378941.1303335958312.JavaMail.root@erie.cs.uoguelph.ca> In-Reply-To: <20110420185347.GH1907@garage.freebsd.pl>
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> On Fri, Apr 15, 2011 at 08:19:36PM -0400, Rick Macklem wrote: > > I don't believe that resource forks are available under FreeBSD at > > this > > time. Solaris supports the "subfile" concept, which is basically the > > same > > as far as I know, so it seems there might be something inside ZFS, > > although > > I suspect it isn't available for FreeBSD? > > > > Does anyone familiar with ZFS know more? > > ZFS in FreeBSD supports extended attributes based on Solaris resource > forks code. Take a look at the zfs_create_attrname() function in > sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c to see how > we > convert the names, etc. > Hmm. NFSv4 supports the resource forks model, too. (They called them named attributes.) I suppose that there would have to be some new VOPs though. For example, the NFSv4 server needs to be able to get all the attribute names, so it can generate a reply to the client (in that ugly readdir xdr format) and I don't think there's a way in the current VFS to ask "give me all the extended attribute names", is there? Might be worth looking at someday, rick ps: I know. Slightly off topic.
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