block: add and use scsi_blk_cmd_ioctl

Introduce a wrapper around scsi_cmd_ioctl that takes a block device.

The function will then be enhanced to detect partition block devices
and, in that case, subject the ioctls to whitelisting.

Cc: linux-scsi@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: James Bottomley <JBottomley@parallels.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 0e376d46bdd1..7333b9e44411 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -1744,12 +1744,11 @@ static int ub_bd_release(struct gendisk *disk, fmode_t mode)
 static int ub_bd_ioctl(struct block_device *bdev, fmode_t mode,
     unsigned int cmd, unsigned long arg)
 {
-        struct gendisk *disk = bdev->bd_disk;
         void __user *usermem = (void __user *) arg;
         int ret;
 
         mutex_lock(&ub_mutex);
-        ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, usermem);
+        ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, usermem);
         mutex_unlock(&ub_mutex);
 
         return ret;