From: Mark Fasheh <mark.fasheh@oracle.com>
Date: Thu, 8 Mar 2007 00:46:57 +0000 (-0800)
Subject: ocfs2: make room for unwritten extents flag
X-Git-Tag: v2.6.22-rc1~1124^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e48edee2d8eab812f31f0ff62c6ba635ca2e1e21;p=pandora-kernel.git

ocfs2: make room for unwritten extents flag

Due to the size of our group bitmaps, we'll never have a leaf node extent
record with more than 16 bits worth of clusters. Split e_clusters up so that
leaf nodes can get a flags field where we can mark unwritten extents.
Interior nodes whose length references all the child nodes beneath it can't
split their e_clusters field, so we use a union to preserve sizing there.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
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