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In order to support striped raid5/6/10 LV reshaping (change
of LV type, stripesize or number of legs), this patch
introduces more local infrastructure to raid_manip.c
used by followup patches.
Change:
- add missing raid1 <-> raid5 conversions to support
linear <-> raid5 <-> raid0(_meta)/striped conversions
- rename related new takeover functions to
_takeover_from_raid1_to_raid5 and _takeover_from_raid5_to_raid1,
because a reshape to > 2 legs is only possible with
raid5 layout
Related: rhbz834579
Related: rhbz1191935
Related: rhbz1191978
Add:
- conversion support from striped/raid0/raid0_meta to/from raid10;
raid10 goes by the near format (same as used in creation of
raid10 LVs), which groups data copies together with their original
blocks (e.g. 3-way striped, 2 data copies resulting in 112233 in the
first stripe followed by 445566 in the second etc.) and is limited
to even numbers of legs for now
- related tests to lvconvert-raid-takeover.sh
- typo
Related: rhbz1366296
