NFS: advertise only supported callback netids
NFSv4.0 clients use the SETCLIENTID operation to inform NFS servers how to contact a client's callback service. If a server cannot contact a client's callback service, that server will not delegate to that client, which results in a performance loss. Our client advertises "rdma" as the callback netid when the forward channel is "rdma". But our client always starts only "tcp" and "tcp6" callback services. Instead of advertising the forward channel netid, advertise "tcp" or "tcp6" as the callback netid, based on the value of the clientaddr mount option, since those are what our client currently supports. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=69171Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>
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