md/raid5: finish support for DDF/raid6

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DDF requires RAID6 calculations over different devices in a different
order.
For md/raid6, we calculate over just the data devices, starting
immediately after the 'Q' block.
For ddf/raid6 we calculate over all devices, using zeros in place of
the P and Q blocks.

This requires unfortunately complex loops...

Signed-off-by: NeilBrown <neilb@suse.de>

...

This commit is contained in:

NeilBrown 2009-03-31 14:39:38 +11:00

parent 99c0fb5f92

commit 67cc2b8165

2 changed files with 41 additions and 18 deletions

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58

drivers/md/raid5.c

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1

drivers/md/raid5.h

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