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md/raid5: Allow reshape while a bitmap is present. 

We always should have allowed this.  A raid5 reshape doesn't change
the size of the bitmap, so not need to restrict it.

Also add a test to make sure we don't try to start a reshape on a
failed array.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2012-05-22 13:55:28 +10:00
parent bb63a7019d
commit 30b67645fa
1 changed files with 3 additions and 3 deletions
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6
drivers/md/raid5.c
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@ -5559,9 +5559,6 @@ static int check_reshape(struct mddev *mddev)
mddev->new_layout == mddev->layout &&
mddev->new_chunk_sectors == mddev->chunk_sectors)
return 0; /* nothing to do */
if (mddev->bitmap)
/* Cannot grow a bitmap yet */
return -EBUSY;
if (has_failed(conf))
return -EINVAL;
if (mddev->delta_disks < 0) {
@ -5596,6 +5593,9 @@ static int raid5_start_reshape(struct mddev *mddev)
if (!check_stripe_cache(mddev))
return -ENOSPC;
if (has_failed(conf))
return -EINVAL;
rdev_for_each(rdev, mddev) {
if (!test_bit(In_sync, &rdev->flags)
&& !test_bit(Faulty, &rdev->flags))