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rbd: include trashed parent images while calculating the clone depth #4029

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rbd: include trashed parent images while calculating the clone depth #4029

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Commits on Dec 1, 2023

  1. rbd: use librbd.OpenImageById() if rbdVol.ImageID is set 

    `librbd.OpenImageById()` works if the image is in the trash, so it makes
it possible to get the parent of the image.

Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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  2. rbd: prevent presetting the ImageID of a new volume 

    When a new volume is not created yet, the ImageID should not be set to
the ID of the snapshot.

Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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  3. rbd: set/get correct ImageID in more places 

    In some places the ImageID is used as the ID of the parent. That is very
confusing and prone to errors. Instead, fetch the right ImageID where
possible, and set ParentID for referencing to parent images.

Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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  4. rbd: skip flattening if an image in trash 

    Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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  5. rbd: the DeleteVolume CSI procedure should succeed on deleted images 

    If the RBD-image is deleted already, the DeleteVolume CSI procedure is
expected to report success (as it should be idempotent). In case the
returned error indicates "RBD image not found", the error is ignored and
the DeleteVolume procedure continues.

Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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  6. rbd: include trashed parent images while calculating the clone depth 

    The `getCloneDepth()` function did not account for images that are in
the trash. A trashed image can only be opened by the image-id, and not
by name anymore.

Closes: ceph#4013
Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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  7. rbd: pass a max-depth to getCloneDepth() 

    The `getCloneDepth()` function does not need to traverse the whole chain
of parents when a certain max-limit is configured. The traversing can be
aborted once the hard-limit is reached. This makes the procedure a
little more efficient, as unnecessary traversing is prevented.

Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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  8. rbd: return CSI expected errors while flattening a snapshot or volume 

    By returned `ABORTED` or `PRECONDITION_FAILED` in the right places, the
CO will retry with the same arguments until the snapshot is
`ReadyToUse`. This causes restoring a volume from a snapshot to be
delayed, until the snapshot can be used.

Signed-off-by: Niels de Vos <ndevos@ibm.com>
    @nixpanic
    nixpanic committed Dec 1, 2023
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