md: Relax checks on ->max_disks when external metadata handling is used. (233fca36) · Commits · 戴 / test

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>

drivers/md/md.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -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;

Admin message