From 77032ca66f86fa631b38b2e7feeb2b953e59f2f0 Mon Sep 17 00:00:00 2001 From: Eric Sandeen Date: Tue, 24 Nov 2015 17:30:34 -0600 Subject: [PATCH] Return EBUSY from BLKRRPART for mounted whole-dev fs Today, blockdev --rereadpt /dev/sda will fail with EBUSY if any partition of sda is mounted (and will fail with EINVAL if pointed at a partition). But it will pass if the entire block device is formatted with a filesystem and mounted. I don't think this makes sense; partitioning should surely not ever change out from under a mounted device. So check for bdev->bd_super, and fail that with -EBUSY as well. Signed-off-by: Eric Sandeen Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- block/partition-generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/partition-generic.c b/block/partition-generic.c index 3b030157ec85..746935a5973c 100644 --- a/block/partition-generic.c +++ b/block/partition-generic.c @@ -397,7 +397,7 @@ static int drop_partitions(struct gendisk *disk, struct block_device *bdev) struct hd_struct *part; int res; - if (bdev->bd_part_count) + if (bdev->bd_part_count || bdev->bd_super) return -EBUSY; res = invalidate_partition(disk, 0); if (res) -- 2.20.1