block: fix busy device checking in blk_drop_partitions

bd_super is only set by get_tree_bdev and mount_bdev, and thus not by other openers like btrfs or the XFS realtime and log devices, as well as block devices directly opened from user space. Check bd_openers instead. Fixes: 77032ca ("Return EBUSY from BLKRRPART for mounted whole-dev fs") Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
fracktal · Apr 7, 2020 · d3ef553 · d3ef553
1 parent 536167d
commit d3ef553
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/block/partitions/core.c b/block/partitions/core.c
@@ -496,7 +496,7 @@ int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev)
 
 	if (!disk_part_scan_enabled(disk))
 		return 0;
-	if (bdev->bd_part_count || bdev->bd_super)
+	if (bdev->bd_part_count || bdev->bd_openers)
 		return -EBUSY;
 	res = invalidate_partition(disk, 0);
 	if (res)