md/raid5: change reshape-progress measurement to cope with reshaping backwards.

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When reducing the number of devices in a raid4/5/6, the reshape
process has to start at the end of the array and work down to the
beginning.  So we need to handle expand_progress and expand_lo
differently.

This patch renames "expand_progress" and "expand_lo" to avoid the
implication that anything is getting bigger (expand->reshape) and
every place they are used, we make sure that they are used the right
way depending on whether delta_disks is positive or negative.

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

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This commit is contained in:

NeilBrown 2009-03-31 15:16:46 +11:00

parent cea9c22800

commit fef9c61fdf

2 changed files with 71 additions and 38 deletions

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94

drivers/md/raid5.c

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15

drivers/md/raid5.h

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