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rbd: take lock on parent image during snapshotcreate

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we need to take lock on parent rbd image when
we are creating a snapshot from it, if the user
tries to delete/resize the rbd image when we are
taking snapshots,we may face issues. if the volume
lock is present on the rbd image, the user cannot
resize the rbd image nor delete the rbd image.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2020-07-02 14:18:12 +05:30 committed by mergify[bot]
parent f946efb7b7
commit 032fb228dd
1 changed files with 7 additions and 0 deletions
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7
internal/rbd/controllerserver.go
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@ -671,6 +671,13 @@ func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateS
}
defer cs.SnapshotLocks.Release(req.GetName())
// Take lock on parent rbd image
if acquired := cs.VolumeLocks.TryAcquire(rbdSnap.SourceVolumeID); !acquired {
klog.Errorf(util.Log(ctx, util.VolumeOperationAlreadyExistsFmt), rbdSnap.SourceVolumeID)
return nil, status.Errorf(codes.Aborted, util.VolumeOperationAlreadyExistsFmt, rbdSnap.SourceVolumeID)
}
defer cs.VolumeLocks.Release(rbdSnap.SourceVolumeID)
// Need to check for already existing snapshot name, and if found
// check for the requested source volume id and already allocated source volume id
found, err := checkSnapCloneExists(ctx, rbdVol, rbdSnap, cr)