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authorHolger Smolinski <Holger.Smolinski@de.ibm.com>2009-01-09 12:14:51 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-01-09 12:15:05 +0100
commit13de227bcd80fbdaeebe1f31154487dddb7d5b1e (patch)
tree3f37f92d9fd5dd3c155544afb06cfe8117ec708c /arch/s390/include/asm
parent1301809bcee33c2153605b4387c57fab75f9800a (diff)
[S390] dasd: add device attribute to disable blocking on lost paths
When the connection between host and storage server is lost, the dasd device driver usually blocks all I/O on affected devices and waits for them to reappear. In some setups however it would be better if the I/O is returned as error so that device can be recovered by some other means, eg. in a raid or multipath setup. Signed-off-by: Holger Smolinski <Holger.Smolinski@de.ibm.com> Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm')
-rw-r--r--arch/s390/include/asm/dasd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index 55b2b80cdf6e..fb50a7864dd5 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -78,6 +78,7 @@ typedef struct dasd_information2_t {
#define DASD_FEATURE_USEDIAG 0x02
#define DASD_FEATURE_INITIAL_ONLINE 0x04
#define DASD_FEATURE_ERPLOG 0x08
+#define DASD_FEATURE_FAILFAST 0x10
#define DASD_PARTN_BITS 2

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