BMC/Intel-BMC/linux.git/drivers/s390/block/dasd_int.h, branch dev

s390/dasd: cleanup profiling

2015-01-29T08:19:29+00:00

The dasd driver has a lot of duplicated code to handle dasd_global_profile. With this patch we use the same code for the global and the per device profiling data. Note that dasd_stats_write had to change slightly to maintain some odd differences between A) per device and global profile and B) proc and sysfs interface usage. Signed-off-by: Sebastian Ott Reviewed-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

s390/dasd: add locking for global_profile access

2015-01-29T08:19:27+00:00

Access to DASDs global statistics is done without locking which can lead to inconsistent data. Add locking to fix this. Also move the relevant structs in a global dasd_profile struct. Signed-off-by: Sebastian Ott Reviewed-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

s390/dasd: add support for control unit initiated reconfiguration

2014-10-09T07:13:54+00:00

Add support for Control Unit Initiated Reconfiguration (CUIR) to Linux, a storage server interface to reconcile concurrent hardware changes between storage and host. Reviewed-by: Stefan Weinhuber Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

s390/dasd: fix camel case

2014-08-01T09:16:18+00:00

Rename enable_PAV to enable_pav. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

dasd: fix error recovery for alias devices during format

2014-07-22T07:26:23+00:00

Kernel panic or a hanging device during format if an alias device is set offline or I/O errors occur. Omit the error recovery procedure for alias devices and do retries on the base device with full erp. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

dasd: use aliases for formatted devices during format

2014-07-22T07:26:21+00:00

Formatting of a previously formatted device is slower than newly format a device when alias devices are available. For already formatted devices the alias devices are not used for formatting. Fix the alias handling for already formatted devices. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

s390/dasd: Fail all requests when DASD_FLAG_ABORTIO is set

2013-07-01T15:31:26+00:00

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

s390/dasd: Add 'timeout' attribute

2013-07-01T15:31:25+00:00

This patch adds a 'timeout' attibute to the DASD driver. When set to non-zero, the blk_timeout function will be enabled with the timeout specified in the attribute. Setting 'timeout' to '0' will disable block timeouts. Signed-off-by: Hannes Reinecke Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky

s390/dasd: make number of retries configurable

2013-07-01T15:31:17+00:00

Instead of having the number of retries hard-coded in the various functions we should be using a default retry value, which can be modified via sysfs. Signed-off-by: Hannes Reinecke Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky

s390/dasd: improve speed of dasdfmt

2013-04-17T12:07:34+00:00

Reorganize format IO requests and enable usage of PAV. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky