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librbd: allocate new journal tag after acquiring exclusive lock #7884

Merged
merged 14 commits into from Mar 9, 2016
Merged

librbd: allocate new journal tag after acquiring exclusive lock #7884

merged 14 commits into from Mar 9, 2016

Commits on Mar 8, 2016

  1. cls_rbd: support for uuid to represent a mirrored pool 

    This uuid will be used as the client id for remote peer image
journals.  This will allow the uuid to be also utilized within
the librbd journal tag for tracking epoch ownership.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  2. librbd: allocate new uuid when enabling mirroring 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  3. librbd: update journal client and tag data structures 

    The mirror peer now holds remote's image id as well as a collection
of bootstrap sync points.  The tag now contains uuids to map back
to the owning pool.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  4. rbd-mirror: local pool id no longer stored in client registration 

    The remote pool name should match the remote pool name.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  5. journal: helper method to retrieve in-memory client data 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  6. librbd: add tag handling to journal state machine 

    The journal will not retrieve the tag class for the image within
the journal in addition to the most recently allocated tag. Also
added helper methods to allocate new tags.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  7. librbd: allocate new journal tag when acquiring exclusive lock 

    The journal tag tracks a write epoch within the image, so before
allowing writes to proceed, ensure the journal entries will be
stored under a new epoch.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  8. librbd: improved debugging for journal client / tag processing 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  9. journal: additional debug messages surrounding commit updates 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  10. journal: properly handle tag transition 

    Now that the tag concept has been re-used for delineating epochs for
librbd, we need playback to properly handle the cases where the active
playback tag abruptly ends and a newer tag is inserted in the first
splay offset object.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  11. tests: updated test cases for librbd journal tag allocation 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  12. journal: clean up playback notification handling 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  13. test: fix errors introduced by rebase to master 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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  14. journal: possible race condition during fetch playback 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
    Jason Dillaman committed Mar 8, 2016
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