mds: fix file_layout_t legacy encoding snafu #8455
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If you data pool was pool 0, this was transforming that to -1 unconditionally, which broke upgrades. We only want do that for a fully zeroed ceph_file_layout, so that it still maps to a file_layout_t. If any fields are set, though, we trust the fl_pgpool to be a valid pool. Signed-off-by: Sage Weil <sage@redhat.com>
Signed-off-by: Sage Weil <sage@redhat.com>
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0=data, 1=metadata, 2=rbd. Remove the blind 0 <-> -1 mapping.