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Re: [dm-devel] [PATCH ] multipath: Fall back to getuid_callout if ID_SERIAL attribute is missing.



On 06/18/2014 02:17 AM, Merla, ShivaKrishna wrote:
  Sometimes whenever a path is added, scsi_id call during udev rule processing
  can fail and ID_SERIAL attribute will not be set. This causes multipathd to add
  the path as orphan. We have seen several instances of this happening during
  testing.

       Jun 17 10:14:43 ictm-vader multipathd[474]: sda: uid_attribute = ID_SERIAL (config file default)
       Jun 17 10:14:43 ictm-vader multipathd[474]: sda: no ID_SERIAL attribute
       Jun 17 10:14:43 ictm-vader multipathd[474]: sda: uid = <empty> (udev)
       Jun 17 10:14:43 ictm-vader multipathd[474]: sda: no ID_SERIAL attribute
       Jun 17 10:14:43 ictm-vader multipathd[474]: sda: uid = <empty> (udev)
       Jun 17 10:14:43 ictm-vader multipathd[474]: sda: failed to get path uid
       Jun 17 10:14:43 ictm-vader multipathd[474]: sda: orphan path, failed to add path

  This patch handles this case by allowing to fall back to explict getuid_callout
  incase if ID_SERIAL attribute is not set. This way support for deprecated
  getuid_callout is not lost for older versions where ID_SERIAL attribute is not
  present but also serves good purpose in the scenario mentioned above.

Signed-off-by: Shiva Krishna Merla<shivakrishna merla netapp com>

Hmm. I have a similar patch in my tree. Will be checking.

Cheers,

Hannes
--
Dr. Hannes Reinecke		      zSeries & Storage
hare suse de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
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