NFSv4.1 handle ERR_DELAY error reclaiming locking state on delegation recall
[ Upstream commit 3d7a9520 ] A client should be able to handle getting an ERR_DELAY error while doing a LOCK call to reclaim state due to delegation being recalled. This is a transient error that can happen due to server moving its volumes and invalidating its file location cache and upon reference to it during the LOCK call needing to do an expensive lookup (leading to an ERR_DELAY error on a PUTFH). Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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