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[S390] dasd: automatic recognition of read-only devices
authorStefan Weinhuber <wein@de.ibm.com>
Mon, 8 Mar 2010 11:26:24 +0000 (12:26 +0100)
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>
Mon, 8 Mar 2010 11:26:27 +0000 (12:26 +0100)
In z/VM it is possible to attach a device as read-only. To prevent
unintentional write requests and subsequent I/O errors, we can detect
this configuration using the z/VM DIAG 210 interface and set the
respective linux block device to read-only as well.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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