linux.git/drivers/scsi/device_handler, branch v2.6.33

[SCSI] scsi_dh_rdac: Add two new IBM devices to rdac_dev_list

2009-12-10T14:54:10+00:00

This patch adds two new IBM storage devices which can use rdac device handlers.

Signed-off-by: Babu Moger 
Signed-off-by: James Bottomley

[SCSI] scsi_dh: create sysfs file, dh_state for all SCSI disk devices

2009-12-04T18:01:29+00:00

Create the sysfs file, dh_state even if the new SCSI device is not
in the any of the device handler's internal lists.

Signed-Off-by: Chandra Seetharaman 
Acked-by: Hannes Reinecke 
Signed-off-by: James Bottomley

[SCSI] scsi_dh: Make alua hardware handler's activate() async

2009-12-04T18:00:48+00:00

Make the activate function asynchronous by using blk_execute_rq_nowait()

Signed-off-by: Chandra Seetharaman 
Signed-off-by: James Bottomley

[SCSI] scsi_dh: Make hp hardware handler's activate() async

2009-12-04T18:00:47+00:00

Make the activate function asynchronous by using blk_execute_rq_nowait()

Signed-off-by: Chandra Seetharaman 
Signed-off-by: James Bottomley

[SCSI] scsi_dh: Make rdac hardware handler's activate() async

2009-12-04T18:00:47+00:00

Batch up MODE_SELECT in rdac device handler.

LSI RDAC storage has the capability of handling mode selects for
multiple luns in a same command. Make use of that ability to send
as few MODE SELECTs as possible to the storage controller as possible.

This patch creates a work queue and queues up activate requests
when a MODE SELECT is sent down the wire. When that MODE SELECT
completes, it compiles queued up activate requests for multiple
luns into a single MODE SELECT.

This reduces the time to do failover/failback of large number of LUNS.

Signed-off-by: Babu Moger 
Signed-off-by: Chandra Seetharaman 
Signed-off-by: James Bottomley

[SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous

2009-12-04T18:00:46+00:00

Make scsi_dh_activate() function asynchronous, by taking in two additional
parameters, one is the callback function and the other is the data to call
the callback function with.

Signed-off-by: Chandra Seetharaman 
Signed-off-by: James Bottomley

[SCSI] scsi_dh_rdac: Fix for returning correct mode select cmd return info

2009-10-02T14:45:09+00:00

The function mode_select_handle_sense returns SCSI_DH_OK even when there is a sense code which is incorrect. Removing it so that it returns SCSI_DH_IO when there is sense that is not handled by this function.

Signed-off-by: Babu Moger 
Reviewed-by: Vijay Chauhan 
Reviewed-by: Bob Stankey 
Reviewed-by: Chandra Seetharaman 
Signed-off-by: James Bottomley

[SCSI] scsi_dh_rdac: changes for rdac debug logging

2009-09-12T14:35:31+00:00

Patch to add debugging stuff for rdac device handler.
- Added a bit mask "module parameter" rdac_logging with 2 bits for each type
  of logging.
- currently defined only two types of logging(failover and sense logging). Can
  be enhanced later if required.
- By default only failover logging is enabled which is equivalent of current
  logging.

Signed-off-by: Babu Moger 
Reviewed-by: Vijay Chauhan 
Reviewed-by: Bob Stankey 
Signed-off-by: James Bottomley

[SCSI] scsi_dh_rdac: changes to collect the rdac debug information during the initialization

2009-09-12T14:35:31+00:00

Adding the code to read the debug information during initialization. This
patch collects the information about storage and controllers during
rdac_activate.

Signed-off-by: Babu Moger 
Reviewed-by: Vijay Chauhan 
Reviewed-by: Bob Stankey 
Signed-off-by: James Bottomley

[SCSI] scsi_dh_rdac: move the init code from rdac_activate to rdac_bus_attach

2009-09-12T14:35:30+00:00

Moving the initialization code from rdac_activate to rdac_bus_attach which is
more efficient.  We don't have to collect all the information during every
activate.

Signed-off-by: Babu Moger 
Reviewed-by: Vijay Chauhan 
Reviewed-by: Bob Stankey 
Signed-off-by: James Bottomley