From 934d9c23b4c7e31840a895ba4b7e88d6413c81f3 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Tue, 28 Oct 2008 17:01:23 +1100
Subject: [PATCH] md: destroy partitions and notify udev when md array is
stopped.
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 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index b4162f6f1b79e..9abf6ed16535c 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3884,6 +3884,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
if (mode == 0) {
mdk_rdev_t *rdev;
struct list_head *tmp;
+ struct block_device *bdev;
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->barriers_work = 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)
printk(KERN_INFO "md: %s switched to read-only mode.\n",
--
2.30.2