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Rick Macklem authored
Without this patch, if a NFSv4.1/4.2 server replies NFSERR_DELAY to a Close operation, the client loops retrying the Close while holding a shared lock on the clientID. This shared lock blocks returns of delegations, even though the server has issued a CB_RECALL to request the delegation return. This patch delays doing a retry of a Close that received a reply of NFSERR_DELAY until after the shared lock on the clientID is released, for NFSv4.1/4.2. To fix this for NFSv4.0 would be very difficult and since the only known NFSv4 server to reply NFSERR_DELAY to Close only does NFSv4.1/4.2, this fix is hoped to be sufficient. This problem was detected during a recent IETF working group NFSv4 testing event. MFC after: 2 week
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