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authorHannes Reinecke <hare@suse.de>2013-01-30 09:26:19 +0000
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-07-01 17:31:26 +0200
commit5ea34a01423a27d4526f3551e8542f2f991bd4a0 (patch)
treebadb135a40e6070c2a4d474e6a240457cb18b484 /drivers/s390/block/dasd_int.h
parent3d71ad32167c9124d5621b54c37a74ef38aa93b0 (diff)
s390/dasd: Fail all requests when DASD_FLAG_ABORTIO is set
Whenever a DASD request encounters a timeout we might need to abort all outstanding requests on this or even other devices. This is especially useful if one wants to fail all devices on one side of a RAID10 configuration, even though only one device exhibited an error. To handle this I've introduced a new device flag DASD_FLAG_ABORTIO. This flag is evaluated in __dasd_process_request_queue() and will invoke blk_abort_request() for all outstanding requests with DASD_CQR_FLAGS_FAILFAST set. This will cause any of these requests to be aborted immediately if the blk_timeout function is activated. The DASD_FLAG_ABORTIO is also evaluated in __dasd_process_request_queue to abort all new request which would have the DASD_CQR_FLAGS_FAILFAST bit set. The flag can be set with the new ioctls 'BIODASDABORTIO' and removed with 'BIODASDALLOWIO'. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
-rw-r--r--drivers/s390/block/dasd_int.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 2bd03f45a72e..690001af0d09 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -524,7 +524,10 @@ struct dasd_block {
#define DASD_FLAG_SUSPENDED 9 /* The device was suspended */
#define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/
#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */
+#define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */
+#define DASD_SLEEPON_START_TAG ((void *) 1)
+#define DASD_SLEEPON_END_TAG ((void *) 2)
void dasd_put_device_wake(struct dasd_device *);