Heiko Carstens <[email protected]> wrote:
>
> From: Horst Hummel <[email protected]>
>
> The open_count is increased for every opener, that includes the
> blkdev_get in dasd_scan_partitions. This tampers the open_count
> in BIODASDINFO. Hide the internal open from user-space.
>
> Signed-off-by: Horst Hummel <[email protected]>
> Signed-off-by: Martin Schwidefsky <[email protected]>
> Signed-off-by: Heiko Carstens <[email protected]>
> ---
>
> drivers/s390/block/dasd_ioctl.c | 9 ++++++++-
> 1 files changed, 8 insertions(+), 1 deletion(-)
>
> diff -urpN linux-2.6/drivers/s390/block/dasd_ioctl.c linux-2.6-patched/drivers/s390/block/dasd_ioctl.c
> --- linux-2.6/drivers/s390/block/dasd_ioctl.c 2006-01-18 17:25:49.000000000 +0100
> +++ linux-2.6-patched/drivers/s390/block/dasd_ioctl.c 2006-01-18 17:25:53.000000000 +0100
> @@ -421,8 +421,15 @@ dasd_ioctl_information(struct block_devi
> dasd_info->cu_model = cdev->id.cu_model;
> dasd_info->dev_type = cdev->id.dev_type;
> dasd_info->dev_model = cdev->id.dev_model;
> - dasd_info->open_count = atomic_read(&device->open_count);
> dasd_info->status = device->state;
> + /*
> + * The open_count is increased for every opener, that includes
> + * the blkdev_get in dasd_scan_partitions.
> + * This must be hidden from user-space.
> + */
> + dasd_info->open_count = atomic_read(&device->open_count);
> + if (!device->bdev)
> + dasd_info->open_count++;
I'll change the above to atomic_inc().
-
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