md: destroy partitions and notify udev when md array is stopped. (934d9c23) · Commits · 戴 / test

md arrays are not currently destroyed when they are stopped - they remain in /sys/block. Last time I tried this I tripped over locking too much. A consequence of this is that udev doesn't remove anything from /dev. This is rather ugly. As an interim measure until proper device removal can be achieved, make sure all partitions are removed using the BLKRRPART ioctl, and send a KOBJ_CHANGE when an md array is stopped. Signed-off-by:

NeilBrown <neilb@suse.de>

drivers/md/md.c

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -3884,6 +3884,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
	if (mode == 0) {		if (mode == 0) {
	mdk_rdev_t *rdev;		mdk_rdev_t *rdev;
	struct list_head *tmp;		struct list_head *tmp;
			struct block_device *bdev;

	printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));		printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));

	@@ -3940,6 +3941,12 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
	mddev->degraded = 0;		mddev->degraded = 0;
	mddev->barriers_work = 0;		mddev->barriers_work = 0;
	mddev->safemode = 0;		mddev->safemode = 0;
			bdev = bdget_disk(mddev->gendisk, 0);
			if (bdev) {
			blkdev_ioctl(bdev, 0, BLKRRPART, 0);
			bdput(bdev);
			}
			kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);

	} else if (mddev->pers)		} else if (mddev->pers)
	printk(KERN_INFO "md: %s switched to read-only mode.\n",		printk(KERN_INFO "md: %s switched to read-only mode.\n",

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