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md: allow array to be resized while bitmap is present.

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Now that bitmaps can be resized, we can allow an array to be resized
while the bitmap is present.

This only covers resizing that involves changing the effective size
of member devices, not resizing that changes the number of devices.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown
2012-05-22 13:55:27 +10:00
parent b81a040481
commit a4a6125a07
4 changed files with 28 additions and 13 deletions
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10
drivers/md/raid10.c
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@@ -3678,9 +3678,15 @@ static int raid10_resize(struct mddev *mddev, sector_t sectors)
oldsize = raid10_size(mddev, 0, 0);
size = raid10_size(mddev, sectors, 0);
md_set_array_sectors(mddev, size);
if (mddev->array_sectors > size)
if (mddev->external_size &&
mddev->array_sectors > size)
return -EINVAL;
if (mddev->bitmap) {
int ret = bitmap_resize(mddev->bitmap, size, 0, 0);
if (ret)
return ret;
}
md_set_array_sectors(mddev, size);
set_capacity(mddev->gendisk, mddev->array_sectors);
revalidate_disk(mddev->gendisk);
if (sectors > mddev->dev_sectors &&