Changes to Userspace multipath code to support lsi-rdac
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- v1 Latest3 patches 3 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | C4 Inquiry based path checkerlibcheckers/ libcheckers/ libcheckers/ +2 more | +129 | 0 replies | |
| 2/3 | Fix the priority calculation to use PATH_GHOST statelibmultipath/ libmultipath/ | +2 | 0 replies | |
| 3/3 | Increase the wait time for device to appear in /devlibmultipath/ | +1 | 0 replies |
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Cover letter [PATCH 0/3] Changes to Userspace multipath code to support lsi-rdac
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....
- [email protected] | .......you may get it.
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