db4bc2514c
After a re-read of the appropriate section of RFC5661, I decided that a few things should be changed related to LayoutRecall callback handling. Here are the things fixed by this patch. - For two of the three cases that LayoutRecall is done, I now think setting the clora_changed argument false is correct. - All errors other than NFSERR_DELAY returned by LayoutRecall appear permanent, so don't retry for any of them. (NFSERR_DELAY is retried by newnfs_request(), so it is not affected by this patch.) - Instead of waiting "forever" (actually until the process is SIGTERM'd) for Layouts to be returned during a mirror copy, fail and return ENXIO after about 1minute. Waiting for a <ctrl>C made sense when pnfsdscopymr() was done by itself, but did not make sense when done via find(1). This patch only affects the pNFS server.
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