linux/drivers/scsi/device_handler, branch v3.16

block: add blk_rq_set_block_pc()

2014-06-06T13:57:37Z

With the optimizations around not clearing the full request at alloc time, we are leaving some of the needed init for REQ_TYPE_BLOCK_PC up to the user allocating the request. Add a blk_rq_set_block_pc() that sets the command type to REQ_TYPE_BLOCK_PC, and properly initializes the members associated with this type of request. Update callers to use this function instead of manipulating rq->cmd_type directly. Includes fixes from Christoph Hellwig for my half-assed attempt. Signed-off-by: Jens Axboe

[SCSI] scsi_dh_alua: ALUA handler attach should succeed while TPG is transitioning

2013-10-25T10:19:33Z

During testing, it was discovered that when a device tries to attach to the alua handler while in TPG state of transitioning, the alua_rtpg function will wait for it to exit the state before allowing it to continue. As a result, if the 60 second timeout expires, the alua handler will not attach to the device. To fix this, I have introduced an input argument to alua_rtpg called wait_for_transition. The idea is that it will wait for the transition to complete before an activation (because the current TPG state has some bearing in that case), but during a discovery if it is transitioning, it will not wait, and will store the state as standby for the time being. I believe the precedent exists for this from commit c0d289b3e59577532c45ee9110ef81bd7b341272 Since if the device reports a state of transitioning, it can transition to other more valid states, and it has been established TPGS is supported on the device, if it is attaching. Signed-off-by: Sean Stewart Acked-by: Hannes Reinecke Signed-off-by: James Bottomley

[SCSI] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention

2013-10-25T10:14:18Z

When the scsi_dh_alua handler issues an RTPG during initialization, if it gets 0x06/0x29/0x04 as the sense, it will fail to attach the handler. NetApp E-Series returns 0x29/0x00 for power on, and 0x29/0x04 for conditions that cause the controller to reboot again. These conditions should be treated identically within the handler. Signed-off-by: Sean Stewart Acked-by: Hannes Reinecke Signed-off-by: James Bottomley

[SCSI] scsi_dh_rdac: Add new IBM 1813 product id to rdac devlist

2013-10-25T08:57:55Z

Signed-off-by: Sean Stewart Signed-off-by: James Bottomley

[SCSI] scsi_dh_alua: Add module parameter to allow failover to non preferred path without STPG

2013-04-11T23:00:31Z

Resending with requested rewording of the parameter description. Currently ALUA device handler sends STPG command during failover and failback. Failover can be optimized by implicit failover (by not to sending STPG command), when 1 is passed as hwhandler parameter in multipath.conf. ex "2 alua 1". We may need to pass the parameter through module param for alua device handler to optimize failover if incase retain_attached_hwhandler set in multipath.conf and hwhandler is set with non-tpgs device handler ex: '1 rdac'. [jejb: fix up whitespace and other issues] Signed-off-by: Vijay Chauhan Signed-off-by: Sean Stewart Acked-by: Hannes Reinecke Signed-off-by: James Bottomley

[SCSI] scsi_dh_alua: fix stpg sense handling

2013-04-10T03:55:21Z

For the stpg_endio path we are not evaluating the sense. The bug is that 1. The error value is set to -EIO when there is sense, so we hit the first error check and always return SCSI_DH_IO. 2. h->senselen is set to zero in submit_stpg. It is not later set to req->sense_len like in the synchrounous exection paths, so we must check the req->sense_len field. Signed-off-by: Mike Christie Signed-off-by: James Bottomley

drivers/scsi/device_handler: remove depends on CONFIG_EXPERIMENTAL

2013-01-21T22:52:45Z

The CONFIG_EXPERIMENTAL config item has not carried much meaning for a while now and is almost always enabled by default. As agreed during the Linux kernel summit, remove it from any "depends on" lines in Kconfigs. CC: "James E.J. Bottomley" Signed-off-by: Kees Cook Signed-off-by: Greg Kroah-Hartman

[SCSI] scsi_dh_alua: Enable STPG for unavailable ports

2012-09-24T08:21:56Z

A quote from SPC-4: "While in the unavailable primary target port asymmetric access state, the device server shall support those of the following commands that it supports while in the active/optimized state: [ ... ] d) SET TARGET PORT GROUPS; [ ... ]". Hence enable sending STPG to a target port group that is in the unavailable state. Signed-off-by: Bart Van Assche Reviewed-by: Mike Christie Acked-by: Hannes Reinecke Cc: Signed-off-by: James Bottomley

[SCSI] scsi_dh_rdac : minor return fix for rdac

2012-09-24T08:11:03Z

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

[SCSI] scsi_dh_rdac : Consolidate rdac strings together

2012-09-24T08:11:03Z

This patch consolidates the strings together. Purpose is to remove minor product strings extensions. That way the future products with similar strings should not require change here. Signed-off-by: Babu Moger Signed-off-by: James Bottomley