From: Christoph Hellwig <hch@lst.de>
Date: Wed, 10 Sep 2014 15:23:35 +0000 (-0700)
Subject: pnfs/blocklayout: implement the return_range method
X-Git-Tag: fixes-for-v3.18-merge-window~10^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71d5b76302e21390b4ab747875de6bd5cfbca979;p=pandora-kernel.git

pnfs/blocklayout: implement the return_range method

This allows removing extents from the extent tree especially on truncate
operations, and thus fixing reads from truncated and re-extended that
previously returned stale data.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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