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Bug #3094
closedkrbd: race between finding existing client and creating new one
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Development
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ceph-qa-suite:
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Description
In rbd_get_client(), an attempt is made to reuse an existing
rbd client if there is already one with matching options.
But the scan for the existing one and the creation of the new
one are not done (together/atomically) under protection of a
single lock, so it's possible with concurrent rbd_add() requests
to have multiple clients created which have the same ceph options.
I don't believe this is a serious problem but the code is not
working as intended so it should be fixed.
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