[dm-devel] [PATCH 0/3] Changes to Userspace multipath code to support lsi-rdac

[Chandra Seetharaman]

Hi All,

While working on lsi-rdac hardware handler, I found that the checkers "tur"
and "readsector0" are not serving the lsi-rdac properly. Also, the storage
device has a active/passive state which need to be handled properly.

So, I wrote a new path checker for lsi-rdac, to use the C4 inquiry page to get
the current owner of the lun and set the state as UP(active) or GHOST(passive).
Changes are in patch 1/3.

After applying the above patch, I realized the priorities are not set properly.
Made some changes to use the GHOST state while setting priorities. Changes are
in patch 2/3.

Debugging the above patches found that the wait time (5 seconds) in multipathd
was not sufficient for the devices to appear in /dev/ It was taking about 20
seconds. Changed the wait time to be 60 seconds. Change in patch 3/3.

Please provide me with your feedback/comment on these changes regarding
correctness, completeness etc.,

Thanks & regards,

chandra

-- 

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    Chandra Seetharaman               | Be careful what you choose....
              - sekharan at us.ibm.com   |      .......you may get it.
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