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[PATCH] md: simplify checking of available size when resizing an array

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When "mdadm --grow --size=xxx" is used to resize an array (use more or less of
each device), we check the new siza against the available space in each
device.

We already have that number recorded in rdev->size, so calculating it is
pointless (and wrong in one obscure case).

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2006-10-28 10:38:30 -07:00 committed by Linus Torvalds
parent 2b6e845986
commit 01ab5662f5
1 changed files with 2 additions and 5 deletions
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7
drivers/md/md.c
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@ -4045,11 +4045,8 @@ static int update_size(mddev_t *mddev, unsigned long size)
return -EBUSY;
ITERATE_RDEV(mddev,rdev,tmp) {
sector_t avail;
if (rdev->sb_offset > rdev->data_offset)
avail = (rdev->sb_offset*2) - rdev->data_offset;
else
avail = get_capacity(rdev->bdev->bd_disk)
- rdev->data_offset;
avail = rdev->size * 2;
if (fit && (size == 0 || size > avail/2))
size = avail/2;
if (avail < ((sector_t)size << 1))