rbd: add support for thick provisioning option

Add an option to the StorageClass to support creating fully allocated
(thick provisioned) RBD images

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Signed-off-by: Niels de Vos <ndevos@redhat.com>

internal/rbd/controllerserver.go

@@ -19,6 +19,8 @@ package rbd
 import (
 	"context"
 	"errors"
+	"fmt"
+	"strconv"
 
 	csicommon "github.com/ceph/ceph-csi/internal/csi-common"
 	"github.com/ceph/ceph-csi/internal/journal"
@@ -116,6 +118,14 @@ func (cs *ControllerServer) parseVolCreateRequest(ctx context.Context, req *csi.
 		return nil, status.Error(codes.InvalidArgument, err.Error())
 	}
 
+	tp := "thickProvision"
+	thick := req.GetParameters()[tp]
+	if thick != "" {
+		if rbdVol.ThickProvision, err = strconv.ParseBool(thick); err != nil {
+			return nil, fmt.Errorf("failed to parse %q: %w", tp, err)
+		}
+	}
+
 	rbdVol.RequestName = req.GetName()
 
 	// Volume Size - Default is 1 GiB

internal/rbd/rbd_util.go

@@ -98,6 +98,7 @@ type rbdVolume struct {
 	Encrypted           bool
 	readOnly            bool
 	Primary             bool
+	ThickProvision      bool
 	KMS                 util.EncryptionKMS
 	// Owner is the creator (tenant, Kubernetes Namespace) of the volume.
 	Owner     string