Messages in this thread Patch in this message | | | Date | Wed, 18 Jan 2006 17:57:45 +0100 | From | Heiko Carstens <> | Subject | [PATCH 6/7] s390: dasd open counter. |
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From: Horst Hummel <horst.hummel@de.ibm.com>
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 <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> ---
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++; /* * check if device is really formatted - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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