From: Peng Tao <tao.peng@primarydata.com>
Date: Mon, 1 Dec 2014 00:22:18 +0000 (+0800)
Subject: nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags
X-Git-Tag: fixes-v4.0-rc1~136^2~27^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c829013dca33110d57c7f625443b716bd7a17671;p=pandora-kernel.git

nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags

Use it to indicate that LD wants to retry layoutget. LD can set
it whenever it wants the common pnfs code to return and retry
pnfs path through a new layout.

The bit gets cleared when client does a new layoutget, when client
closes the file (ROC case), or when kernel needs to evict the inode
(non-ROC case).

Signed-off-by: Peng Tao <tao.peng@primarydata.com>
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