Commit 57467195 authored by Horst Hummel's avatar Horst Hummel Committed by Linus Torvalds
Browse files

[PATCH] s390: dasd open counter 



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: default avatarHorst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 600b5d16

drivers/s390/block/dasd_ioctl.c

+8 −1
Original line number Diff line number Diff line
@@ -421,8 +421,15 @@ dasd_ioctl_information(struct block_device *bdev, int no, long args) 
	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

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