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

[Hannes Reinecke]

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 at netapp.com>

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

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
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