commit 5a27e60dec59a95bd7f8ae9a19ae2ede4f76395b
author Stefan Weinhuber <wein@de.ibm.com> Wed Jan 05 12:48:04 2011 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> Wed Jan 05 12:47:30 2011 +0100
tree 20595cba0caebf7a8a5f0afac9785c7d717f3e8c
parent a4d26c6aeceea330ee5e0fb6b017d57e3b252d29

[S390] dasd: Improve handling of stolen DASD reservation

If a DASD device has been reserved by a Linux system, and later
this reservation is ‘stolen’ by a second system by means of an
unconditional reserve, then the first system receives a
notification about this fact. With this patch such an event can
be either ignored, as before, or it can be used to let the device
fail all I/O request, so that the device will not block anymore.

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

arch/s390/include/asm/dasd.h

diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index b604a91..47fcdad 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -80,6 +80,7 @@
 #define DASD_FEATURE_INITIAL_ONLINE  0x04
 #define DASD_FEATURE_ERPLOG	     0x08
 #define DASD_FEATURE_FAILFAST	     0x10
+#define DASD_FEATURE_FAILONSLCK      0x20
 
 #define DASD_PARTN_BITS 2