From c829013dca33110d57c7f625443b716bd7a17671 Mon Sep 17 00:00:00 2001
From: Peng Tao <tao.peng@primarydata.com>
Date: Mon, 1 Dec 2014 08:22:18 +0800
Subject: [PATCH] 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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