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rbd: DisAllow CreateVoulume for missmatch volume size

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If the requested volume size and the snapshot or the
parent volume from which the clone is to be created
is not equal cephcsi returns an error message.

updates #1188

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2020-07-16 15:28:27 +05:30 committed by mergify[bot]
parent b949d5f9c7
commit 684cb13c54
1 changed files with 32 additions and 0 deletions
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32
internal/rbd/controllerserver.go
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@ -175,6 +175,33 @@ func getGRPCErrorForCreateVolume(err error) error {
return status.Error(codes.Internal, err.Error())
}
// validateRequestedVolumeSize validates the request volume size with the
// source snapshot or volume size, if there is a size missmatch it returns an error.
func validateRequestedVolumeSize(rbdVol, parentVol *rbdVolume, rbdSnap *rbdSnapshot, cr *util.Credentials) error {
if rbdSnap != nil {
vol := generateVolFromSnap(rbdSnap)
err := vol.Connect(cr)
if err != nil {
return status.Error(codes.Internal, err.Error())
}
defer vol.Destroy()
err = vol.getImageInfo()
if err != nil {
return status.Error(codes.Internal, err.Error())
}
if rbdVol.VolSize != vol.VolSize {
return status.Errorf(codes.InvalidArgument, "size missmatch, requested volume size %d and source snapshot size %d", rbdVol.VolSize, vol.VolSize)
}
}
if parentVol != nil {
if rbdVol.VolSize != parentVol.VolSize {
return status.Errorf(codes.InvalidArgument, "size missmatch, requested volume size %d and source volume size %d", rbdVol.VolSize, parentVol.VolSize)
}
}
return nil
}
// CreateVolume creates the volume in backend
func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
if err := cs.validateVolumeReq(ctx, req); err != nil {
@ -227,6 +254,11 @@ func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
return buildCreateVolumeResponse(ctx, req, rbdVol)
}
err = validateRequestedVolumeSize(rbdVol, parentVol, rbdSnap, cr)
if err != nil {
return nil, err
}
err = flattenParentImage(ctx, parentVol, cr)
if err != nil {
return nil, err