2de592f6e1
r362490 marked that the NFSv4 attribute TimeCreate (va_birthtime) is supported, but it did not change the NFS server code to actually do it. As such, errors could occur when unrolling a tarball onto an NFSv4 mounted volume, since setting TimeCreate would fail with a NFSERR_ATTRNOTSUPP reply. This patch fixes the server so that it does TimeCreate and also makes sure that TimeCreate will not be set for a DS file for a pNFS server. A separate commit will add a check to the NFSv4 client for support of the TimeCreate attribute before attempting to set it, to avoid a problem when mounting a server that does not support the attribute. The failures will still occur for r362490 or later kernels that do not have this patch, since they indicate support for the attribute, but do not actually support the attribute.
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