From: Josef Bacik <jbacik@fusionio.com>
Date: Mon, 3 Dec 2012 15:31:19 +0000 (-0500)
Subject: Btrfs: keep track of the extents original block length
X-Git-Tag: v3.8-rc1~71^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b493968096944a11422c4d80fb87af537ca1cac7;p=pandora-kernel.git

Btrfs: keep track of the extents original block length

If we've written to a prealloc extent we need to know the original block len
for the extent.  We can't figure this out currently since ->block_len is
just set to the extent length.  So introduce ->orig_block_len so that we
know how many bytes were in the original extent for proper extent logging
that future patches will need.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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