RFC 5661, "Network File System (NFS) Version 4 Minor Version 1 Protocol", January 2010Source of RFC: nfsv4 (tsv)
Errata ID: 4492
Reported By: David Noveck
Date Reported: 2015-10-05
Section 18.17.4 says:
If the server does not support named attributes for the current filehandle, an error of NFS4ERR_NOTSUPP will be returned to the client.
It should say:
If the server does not support named attributes for file system objects on the file system associated with the current filehandle, an error of NFS4ERR_NOTSUPP will be returned to the client.
There are a number of situations in which, a server might not support named attributes on particular file system objects. A number of cases concern doing an OPENATTR on a named attribute directory or named attribute and are mentioned in the immediately preceeding section.
Aside from that contradiction, many implementations might allow named attributes on
symbolic likes or special files. The existing text would require NFS4ERR_NOTSUPP rather
than NFS4ERR_WRONG_TYPE to be returned in such cases, causing the client to conclude
incorrectly that named attribute support is not present for the file system in question, or at
least be uncertain about the presence/absence of such support.