rbd: skip the copyup when an entire object writing
It need to copyup the parent's content when layered writing, but an entire object write would overwrite it, so skip it. Signed-off-by: Guangliang Zhao <lucienchao@gmail.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com> Reviewed-by: Alex Elder <elder@linaro.org>
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@ -2769,6 +2769,14 @@ static bool img_obj_request_simple(struct rbd_obj_request *obj_request)
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if (!obj_request_overlaps_parent(obj_request))
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if (!obj_request_overlaps_parent(obj_request))
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return true;
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return true;
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/*
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* Entire-object layered writes - we will overwrite whatever
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* parent data there is anyway.
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*/
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if (!obj_request->offset &&
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obj_request->length == rbd_obj_bytes(&rbd_dev->header))
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return true;
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/*
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/*
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* If the object is known to already exist, its parent data has
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* If the object is known to already exist, its parent data has
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* already been copied.
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* already been copied.
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