From: Dan Williams <dan.j.williams@intel.com>
Date: Wed, 18 Mar 2009 01:10:40 +0000 (-0700)
Subject: md: add 'size' as a personality method
X-Git-Tag: v2.6.30-rc1~241^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=80c3a6ce4ba4470379b9e6a4d9bcd9d2ee26ae03;p=pandora-kernel.git

md: add 'size' as a personality method

In preparation for giving userspace control over ->array_sectors we need
to be able to retrieve the 'default' size, and the 'anticipated' size
when a reshape is requested.  For personalities that do not reshape emit
a warning if anything but the default size is requested.

In the raid5 case we need to update ->previous_raid_disks to make the
new 'default' size available.

Reviewed-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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