From: Hannes Reinecke Date: Wed, 30 Jan 2013 09:26:19 +0000 (+0000) Subject: s390/dasd: Fail all requests when DASD_FLAG_ABORTIO is set X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~39^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ea34a01423a27d4526f3551e8542f2f991bd4a0;p=pandora-kernel.git 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 Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky --- Reading git-diff-tree failed