This series applies on top of the new rbd request code.
When an osd request is marked to linger the osd client will keep
a copy of the request, and will resubmit it if necessary. If it
gets resubmitted, it will also call the completion routine again,
and because of that we need to make sure the associated object
request structure remains valid. The last patch in this series
ensures that by taking an extra reference for an object request
set to linger.
-Alex
[PATCH 1/4] rbd: unregister linger in watch sync routine
[PATCH 2/4] rbd: track object rather than osd request for watch
[PATCH 3/4] rbd: decrement obj request count when deleting
[PATCH 4/4] rbd: don't drop watch requests on completion
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