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rbd: move flattening to helper function

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in NodeStage operation we are flattening
the image to support mounting on the older
clients. this commits moves it to a helper
function to reduce code complexity.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2021-10-05 15:23:08 +05:30 committed by mergify[bot]
parent cda2abca5d
commit fe9020260d
1 changed files with 39 additions and 24 deletions
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63
internal/rbd/nodeserver.go
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@ -386,8 +386,6 @@ func (ns *NodeServer) stageTransaction(
var err error
var readOnly bool
var feature bool
var depth uint
var cr *util.Credentials
cr, err = util.NewUserCredentials(req.GetSecrets())
@ -403,29 +401,11 @@ func (ns *NodeServer) stageTransaction(
volOptions.readOnly = true
}
if kernelRelease == "" {
// fetch the current running kernel info
kernelRelease, err = util.GetKernelVersion()
if err != nil {
return transaction, err
}
}
if !util.CheckKernelSupport(kernelRelease, deepFlattenSupport) && !skipForceFlatten {
feature, err = volOptions.checkImageChainHasFeature(ctx, librbd.FeatureDeepFlatten)
if err != nil {
return transaction, err
}
depth, err = volOptions.getCloneDepth(ctx)
if err != nil {
return transaction, err
}
if feature || depth != 0 {
err = volOptions.flattenRbdImage(ctx, cr, true, rbdHardMaxCloneDepth, rbdSoftMaxCloneDepth)
if err != nil {
return transaction, err
}
}
err = flattenImageBeforeMapping(ctx, volOptions, cr)
if err != nil {
return transaction, err
}
// Mapping RBD image
var devicePath string
devicePath, err = attachRBDImage(ctx, volOptions, devicePath, cr)
@ -481,6 +461,41 @@ func (ns *NodeServer) stageTransaction(
return transaction, err
}
func flattenImageBeforeMapping(
ctx context.Context,
volOptions *rbdVolume,
cr *util.Credentials) error {
var err error
var feature bool
var depth uint
if kernelRelease == "" {
// fetch the current running kernel info
kernelRelease, err = util.GetKernelVersion()
if err != nil {
return err
}
}
if !util.CheckKernelSupport(kernelRelease, deepFlattenSupport) && !skipForceFlatten {
feature, err = volOptions.checkImageChainHasFeature(ctx, librbd.FeatureDeepFlatten)
if err != nil {
return err
}
depth, err = volOptions.getCloneDepth(ctx)
if err != nil {
return err
}
if feature || depth != 0 {
err = volOptions.flattenRbdImage(ctx, cr, true, rbdHardMaxCloneDepth, rbdSoftMaxCloneDepth)
if err != nil {
return err
}
}
}
return nil
}
func (ns *NodeServer) undoStagingTransaction(
ctx context.Context,
req *csi.NodeStageVolumeRequest,