From f742dc4a32587bff50b13dde9d8894b96851951a Mon Sep 17 00:00:00 2001
From: Peng Tao <bergwolf@gmail.com>
Date: Fri, 24 Aug 2012 00:27:52 +0800
Subject: [PATCH] pnfsblock: fix non-aligned DIO read

For DIO read, if it is not sector aligned, we should reject it
and resend via MDS. Otherwise there might be data corruption.
Also teach bl_read_pagelist to handle partial page reads for DIO.

Cc: stable <stable@vger.kernel.org> [since v3.4]
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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