From: Peng Tao <tao.peng@primarydata.com>
Date: Fri, 30 May 2014 10:15:55 +0000 (+0800)
Subject: nfs41: move file layout macros to generic pnfs
X-Git-Tag: fixes-v4.0-rc1~136^2~27^2~46
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39280a5ae8443dcc1ab3bb5ebc205aab0855b849;p=pandora-kernel.git

nfs41: move file layout macros to generic pnfs

They can be reused by flexfile layout as well.

Also add a code such that if read fails on one DS and
there are other DSes available to use, don't resend
through MDS but through pNFS so that client can read
from other DSes.

Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
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