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librbd: journal framework for tracking exclusive lock transitions #7529

Merged
merged 7 commits into from Feb 6, 2016
Merged

librbd: journal framework for tracking exclusive lock transitions #7529

merged 7 commits into from Feb 6, 2016

Commits on Feb 5, 2016

  1. journal: switched entry tags to use id instead of string 

    Later commits will add the ability to allocate tags and
associate them with registered clients.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Feb 5, 2016
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  2. cls_journal: new tag management methods and handling 

    In the case of librbd, a new tag will be allocated when the
exclusive lock is acquired.  All tags for the same dataset
(e.g. librbd image) will belong to the same class.  Tags are
automatically pruned on tag create / client unregister
if no other clients' commit position would require the tags.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Feb 5, 2016
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  3. cls_journal: client registration should hold opaque data structure 

    The opaque structure will support journal client applications to
store and retrieve complex state.

Fixes: ceph#13298

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Feb 5, 2016
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  4. cls_journal: new get_client / client_update methods 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Feb 5, 2016
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  5. journal: added tag support methods 

    librbd, for example, will allocate a new tag after acquiring
the exclusive lock.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Feb 5, 2016
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  6. librbd: initial version of journal client and tag metadata 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Feb 5, 2016
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  7. librbd: partial implementation of journal client / tag allocation 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Feb 5, 2016
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