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cleanup: refractor checkCloneImage to reducing nesting if

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This commit refractors checkCloneImage function to
address nestif linter issue.

Signed-off-by: Rakshith R <rar@redhat.com>
This commit is contained in:
Rakshith R 2021-07-14 14:41:50 +05:30 committed by mergify[bot]
parent a5a8952716
commit 859d696279
1 changed files with 37 additions and 35 deletions
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72
internal/rbd/clone.go
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@ -75,50 +75,52 @@ func (rv *rbdVolume) checkCloneImage(ctx context.Context, parentVol *rbdVolume)
}
return true, nil
case !errors.Is(err, ErrImageNotFound):
// any error other than image not found return error
return false, err
}
} else {
// snap will be create after we flatten the temporary cloned image,no
// need to check for flatten here.
// as the snap exists,create clone image and delete temporary snapshot
// and add task to flatten temporary cloned image
err = rv.cloneRbdImageFromSnapshot(ctx, snap, parentVol)
if err != nil {
util.ErrorLog(ctx, "failed to clone rbd image %s from snapshot %s: %v", rv.RbdImageName, snap.RbdSnapName, err)
err = fmt.Errorf("failed to clone rbd image %s from snapshot %s: %w", rv.RbdImageName, snap.RbdSnapName, err)
case errors.Is(err, ErrImageNotFound):
// as the temp clone does not exist,check snapshot exists on parent volume
// snapshot name is same as temporary clone image
snap.RbdImageName = tempClone.RbdImageName
err = parentVol.checkSnapExists(snap)
if err == nil {
// the temp clone exists, delete it lets reserve a new ID and
// create new resources for a cleaner approach
err = parentVol.deleteSnapshot(ctx, snap)
}
if errors.Is(err, ErrSnapNotFound) {
return false, nil
}
return false, err
}
err = tempClone.deleteSnapshot(ctx, snap)
if err != nil {
util.ErrorLog(ctx, "failed to delete snapshot: %v", err)
default:
// any error other than the above return error
return false, err
}
// check image needs flatten, if yes add task to flatten the clone
err = rv.flattenRbdImage(ctx, rv.conn.Creds, false, rbdHardMaxCloneDepth, rbdSoftMaxCloneDepth)
if err != nil {
return false, err
}
return true, nil
}
// as the temp clone does not exist,check snapshot exists on parent volume
// snapshot name is same as temporary clone image
snap.RbdImageName = tempClone.RbdImageName
err = parentVol.checkSnapExists(snap)
if err == nil {
// the temp clone exists, delete it lets reserve a new ID and
// create new resources for a cleaner approach
err = parentVol.deleteSnapshot(ctx, snap)
// snap will be create after we flatten the temporary cloned image,no
// need to check for flatten here.
// as the snap exists,create clone image and delete temporary snapshot
// and add task to flatten temporary cloned image
err = rv.cloneRbdImageFromSnapshot(ctx, snap, parentVol)
if err != nil {
util.ErrorLog(ctx, "failed to clone rbd image %s from snapshot %s: %v", rv.RbdImageName, snap.RbdSnapName, err)
err = fmt.Errorf("failed to clone rbd image %s from snapshot %s: %w", rv.RbdImageName, snap.RbdSnapName, err)
return false, err
}
if errors.Is(err, ErrSnapNotFound) {
return false, nil
err = tempClone.deleteSnapshot(ctx, snap)
if err != nil {
util.ErrorLog(ctx, "failed to delete snapshot: %v", err)
return false, err
}
// check image needs flatten, if yes add task to flatten the clone
err = rv.flattenRbdImage(ctx, rv.conn.Creds, false, rbdHardMaxCloneDepth, rbdSoftMaxCloneDepth)
if err != nil {
return false, err
}
return false, err
return true, nil
}
func (rv *rbdVolume) generateTempClone() *rbdVolume {