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[PATCH] md: restart a (raid5) reshape that has been aborted due to a read/write error

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An error always aborts any resync/recovery/reshape on the understanding that
it will immediately be restarted if that still makes sense.  However a reshape
currently doesn't get restarted.  With this patch it does.

To avoid restarting when it is not possible to do work, we call into the
personality to check that a reshape is ok, and strengthen raid5_check_reshape
to fail if there are too many failed devices.

We also break some code out into a separate function: remove_and_add_spares as
the indent level for that code was getting crazy.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
NeilBrown
2007-02-28 20:11:48 -08:00
committed by Linus Torvalds
parent d1b5380c7f
commit b4c4c7b809
2 changed files with 47 additions and 29 deletions
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2
drivers/md/raid5.c
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@ -3814,6 +3814,8 @@ static int raid5_check_reshape(mddev_t *mddev)
if (err)
return err;
if (mddev->degraded > conf->max_degraded)
return -EINVAL;
/* looks like we might be able to manage this */
return 0;
}