From: Guangliang Zhao <lucienchao@gmail.com>
Date: Tue, 1 Apr 2014 14:22:15 +0000 (+0800)
Subject: rbd: skip the copyup when an entire object writing
X-Git-Tag: fixes-against-v3.18-rc2~71^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c622d226155b12276ae3d29d546f4b314d7cd68c;p=pandora-kernel.git

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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