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Return EBUSY from BLKRRPART for mounted whole-dev fs

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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 <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Eric Sandeen authored and Jens Axboe committed 2015-11-25 20:49:24 -07:00
1 parent 78c4a49a69
commit 77032ca66f
1 file changed
+1 -1
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block/partition-generic.c
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@@ -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)