xattr support in NFS?

Does Linux support xattr in NFS?

IF tries using it in both NFS3 and NFS4 under Debian Lenny (2.6.32, both server and client), without success.

# setfattr -n user.comment -v "this is a comment" /mnt/nfs
setfattr: /mnt/nfs: Operation not supported

Tomasz Chmielewski
http://blog.wpkg.org

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Can you restate reasoning why it will never do so, and whether this is the same as saying it will never implement named attributes?

Thanks,

Matt

Matt Benjamin
The Linux Box
206 South Fifth Ave. Suite 150
Ann Arbor, MI  48104

http://linuxbox.com

tel. 734-761-4689
fax. 734-769-8938
cel. 734-216-5309

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A few years ago, SGI tried to promote "NFS3 XATTR", an extension to NFSv3 to add xattr support. It roughly added 3 functions to the protocol (GETXATTR, SETXATTR, LISTXATTR), in a similar way as what 9p.2000L does. Nothing but IRIX had this NFSv3 feature. As far as I know, it remained quite exotic and stayed a SGI's thing.

Philippe

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Actually, that reasoning sounds a little like a concession that the feature should be blocked precisely because it may be tremendously popular (useful). I don't think the argument that proplists can be the building blocks for new system--but also application--functionality is a good argument against them.

Matt Benjamin
The Linux Box
206 South Fifth Ave. Suite 150
Ann Arbor, MI  48104

http://linuxbox.com

tel. 734-761-4689
fax. 734-769-8938
cel. 734-216-5309

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