From: Peng Tao <tao.peng@primarydata.com>
Date: Fri, 5 Sep 2014 16:53:23 +0000 (+0800)
Subject: nfs41: add a helper to mark layout for return
X-Git-Tag: fixes-v4.0-rc1~136^2~27^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=016256df3a7e9eeb3f4dea5ccd0e21a0b63841eb;p=pandora-kernel.git

nfs41: add a helper to mark layout for return

It marks all matching layout segments as NFS_LSEG_LAYOUTRETURN,
which is an indicator for pnfs_put_lseg() to send layoutreturn,
and also prevents pnfs_update_layout() from using the returning
segments. Once it is set, it never gets cleared.

It also sets proper io failure bit so that pnfs path can be retried
after PNFS_LAYOUTGET_RETRY_TIMEOUT second.

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