tree de88622f05a7e681ac7bff7714e8f2d8953b66ac
parent 93ed05e2a56b5ee06c0100a169433b11c4aa5d0b
author Dan Williams <dan.j.williams@intel.com> 1237338640 -0700
committer Dan Williams <dan.j.williams@intel.com> 1238471869 +1100

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>