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[S390] dasd: Add support for raw ECKD access.

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Normal I/O operations through the DASD device driver give only access
to the data fields of an ECKD device even for track based I/O.
This patch extends the DASD device driver to give access to whole
ECKD tracks including count, key and data fields.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland
2011-01-05 12:48:06 +01:00
committed by Martin Schwidefsky
parent 6f272b9cec
commit e4dbb0f2b5
5 changed files with 268 additions and 8 deletions
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2
arch/s390/include/asm/dasd.h
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@@ -73,6 +73,7 @@ typedef struct dasd_information2_t {
* 0x02: use diag discipline (diag)
* 0x04: set the device initially online (internal use only)
* 0x08: enable ERP related logging
* 0x20: give access to raw eckd data
*/
#define DASD_FEATURE_DEFAULT 0x00
#define DASD_FEATURE_READONLY 0x01
@@ -81,6 +82,7 @@ typedef struct dasd_information2_t {
#define DASD_FEATURE_ERPLOG 0x08
#define DASD_FEATURE_FAILFAST 0x10
#define DASD_FEATURE_FAILONSLCK 0x20
#define DASD_FEATURE_USERAW 0x40
#define DASD_PARTN_BITS 2