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md: Relax checks on ->max_disks when external metadata handling is used. 

When metadata is being managed by user-space, md doesn't know
what the maximum number of devices allowed in an array is
so ->max_disks is 0.  In this case we should allow any (+ve)
number of disks.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2010-04-14 17:02:09 +10:00
parent b71031076e
commit 233fca36bb
1 changed files with 4 additions and 3 deletions
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7
drivers/md/md.c
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@ -2801,8 +2801,9 @@ static void analyze_sbs(mddev_t * mddev)
i = 0;
rdev_for_each(rdev, tmp, mddev) {
if (rdev->desc_nr >= mddev->max_disks ||
i > mddev->max_disks) {
if (mddev->max_disks &&
(rdev->desc_nr >= mddev->max_disks ||
i > mddev->max_disks)) {
printk(KERN_WARNING
"md: %s: %s: only %d devices permitted\n",
mdname(mddev), bdevname(rdev->bdev, b),
@ -5406,7 +5407,7 @@ static int update_raid_disks(mddev_t *mddev, int raid_disks)
if (mddev->pers->check_reshape == NULL)
return -EINVAL;
if (raid_disks <= 0 ||
raid_disks >= mddev->max_disks)
(mddev->max_disks && raid_disks >= mddev->max_disks))
return -EINVAL;
if (mddev->sync_thread || mddev->reshape_position != MaxSector)
return -EBUSY;