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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 /arch/s390/include/uapi/asm/dasd.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 'arch/s390/include/uapi/asm/dasd.h')
-rw-r--r--arch/s390/include/uapi/asm/dasd.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/dasd.h b/arch/s390/include/uapi/asm/dasd.h
index 38eca3ba40e2..5812a3b2df9e 100644
--- a/arch/s390/include/uapi/asm/dasd.h
+++ b/arch/s390/include/uapi/asm/dasd.h
@@ -261,6 +261,10 @@ struct dasd_snid_ioctl_data {
#define BIODASDQUIESCE _IO(DASD_IOCTL_LETTER,6)
/* Resume IO on device */
#define BIODASDRESUME _IO(DASD_IOCTL_LETTER,7)
+/* Abort all I/O on a device */
+#define BIODASDABORTIO _IO(DASD_IOCTL_LETTER, 240)
+/* Allow I/O on a device */
+#define BIODASDALLOWIO _IO(DASD_IOCTL_LETTER, 241)
/* retrieve API version number */

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