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s390/dasd: configurable IFCC handling

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Make the behavior in case of constant IFCC/CCC errors configurable.
Add a sysfs attribute to switch between path disabled after threshold
exceeded (default) and message only.

Reviewed-by: Jan Hoeppner <hoeppner@linux.vnet.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland
2017-12-19 16:18:38 +01:00
committed by Martin Schwidefsky
parent 66aec64721
commit ddc1c94535
3 changed files with 77 additions and 21 deletions
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38
arch/s390/include/uapi/asm/dasd.h
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@@ -68,25 +68,27 @@ typedef struct dasd_information2_t {
#define DASD_FORMAT_CDL 2
/*
* values to be used for dasd_information_t.features
* 0x00: default features
* 0x01: readonly (ro)
* 0x02: use diag discipline (diag)
* 0x04: set the device initially online (internal use only)
* 0x08: enable ERP related logging
* 0x10: allow I/O to fail on lost paths
* 0x20: allow I/O to fail when a lock was stolen
* 0x40: give access to raw eckd data
* 0x80: enable discard support
* 0x100: default features
* 0x001: readonly (ro)
* 0x002: use diag discipline (diag)
* 0x004: set the device initially online (internal use only)
* 0x008: enable ERP related logging
* 0x010: allow I/O to fail on lost paths
* 0x020: allow I/O to fail when a lock was stolen
* 0x040: give access to raw eckd data
* 0x080: enable discard support
* 0x100: enable autodisable for IFCC errors (default)
*/
#define DASD_FEATURE_DEFAULT 0x00
#define DASD_FEATURE_READONLY 0x01
#define DASD_FEATURE_USEDIAG 0x02
#define DASD_FEATURE_INITIAL_ONLINE 0x04
#define DASD_FEATURE_ERPLOG 0x08
#define DASD_FEATURE_FAILFAST 0x10
#define DASD_FEATURE_FAILONSLCK 0x20
#define DASD_FEATURE_USERAW 0x40
#define DASD_FEATURE_DISCARD 0x80
#define DASD_FEATURE_READONLY 0x001
#define DASD_FEATURE_USEDIAG 0x002
#define DASD_FEATURE_INITIAL_ONLINE 0x004
#define DASD_FEATURE_ERPLOG 0x008
#define DASD_FEATURE_FAILFAST 0x010
#define DASD_FEATURE_FAILONSLCK 0x020
#define DASD_FEATURE_USERAW 0x040
#define DASD_FEATURE_DISCARD 0x080
#define DASD_FEATURE_PATH_AUTODISABLE 0x100
#define DASD_FEATURE_DEFAULT DASD_FEATURE_PATH_AUTODISABLE
#define DASD_PARTN_BITS 2