rbd: rename snap_exists field
A Boolean field "snap_exists" in an rbd mapping is used to indicate whether a mapped snapshot has been removed from an image's snapshot context, to stop sending requests for that snapshot as soon as we know it's gone. Generalize the interpretation of this field so it applies to non-snapshot (i.e. "head") mappings. That is, define its value to be false until the mapping has been set, and then define it to be true for both snapshot mappings or head mappings. Rename the field "exists" to reflect the broader interpretation. The rbd_mapping structure is on its way out, so move the field back into the rbd_device structure. Signed-off-by:Alex Elder <elder@inktank.com> Reviewed-by:
Josh Durgin <josh.durgin@inktank.com>
parent
971f839a
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