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Commit bb63a701 authored by NeilBrown's avatar NeilBrown
Browse files

md/raid10: resize bitmap when required during reshape. 



If a reshape changes the size of the array, then we can now
update the bitmap to suit - so do so.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent a4a6125a

drivers/md/raid10.c

+24 −13
Original line number Diff line number Diff line
@@ -3786,8 +3786,6 @@ static int raid10_check_reshape(struct mddev *mddev) 
			/* not factor of array size */

			return -EINVAL;



	if (mddev->bitmap)

		return -EBUSY;

	if (!enough(conf, -1))

		return -EINVAL;
@@ -3882,6 +3880,7 @@ static int raid10_start_reshape(struct mddev *mddev) 
	struct r10conf *conf = mddev->private;

	struct md_rdev *rdev;

	int spares = 0;

	int ret;



	if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))

		return -EBUSY;
@@ -3943,6 +3942,14 @@ static int raid10_start_reshape(struct mddev *mddev) 
		conf->reshape_progress = 0;

	spin_unlock_irq(&conf->device_lock);



	if (mddev->delta_disks && mddev->bitmap) {

		ret = bitmap_resize(mddev->bitmap,

				    raid10_size(mddev, 0,

						conf->geo.raid_disks),

				    0, 0);

		if (ret)

			goto abort;

	}

	if (mddev->delta_disks > 0) {

		rdev_for_each(rdev, mddev)

			if (rdev->raid_disk < 0 &&
@@ -3982,6 +3989,15 @@ static int raid10_start_reshape(struct mddev *mddev) 
	mddev->sync_thread = md_register_thread(md_do_sync, mddev,

						"reshape");

	if (!mddev->sync_thread) {

		ret = -EAGAIN;

		goto abort;

	}

	conf->reshape_checkpoint = jiffies;

	md_wakeup_thread(mddev->sync_thread);

	md_new_event(mddev);

	return 0;



abort:

	mddev->recovery = 0;

	spin_lock_irq(&conf->device_lock);

	conf->geo = conf->prev;
@@ -3992,12 +4008,7 @@ static int raid10_start_reshape(struct mddev *mddev) 
	conf->reshape_progress = MaxSector;

	mddev->reshape_position = MaxSector;

	spin_unlock_irq(&conf->device_lock);

		return -EAGAIN;

	}

	conf->reshape_checkpoint = jiffies;

	md_wakeup_thread(mddev->sync_thread);

	md_new_event(mddev);

	return 0;

	return ret;

}



/* Calculate the last device-address that could contain