[PATCH 0/2] 'default' hardware handler for multipath

[Hannes Reinecke <hare@xxxxxxx>]

This patchset introduces a 'default' hardware handler for
dm-multipath.
Modern storage arrays typically support two failover methods,
the original proprietary and the modern ALUA-based one.
The device_handler implementation will currently select the
ALUA handler, and falling back to the proprietary one if
ALUA isn't supported.
However, in the built-in hardware table for multipath one
can specify only one hardware handler, causing the original
hardware handler to be overwritten.
By specifying a 'default' hardware handler multipath will not
try to attach a specific hardware handler, but rather using
the currently attached on.

Hannes Reinecke (2):
  scsi_dh: Allow NULL hardware handler name in scsi_dh_attach()
  dm-mpath: Allow 'default' hardware handler

 drivers/md/dm-mpath.c                 |    8 ++++++--
 drivers/scsi/device_handler/scsi_dh.c |    8 ++++++--
 2 files changed, 12 insertions(+), 4 deletions(-)

-- 
1.7.7

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