cleanup: move internal/rbd/errors.go to internal/rbd/errors pacakge

Signed-off-by: Praveen M <m.praveen@ibm.com>

internal/rbd/group/group_snapshot.go

@@ -24,6 +24,7 @@ import (
 	"github.com/container-storage-interface/spec/lib/go/csi"
 	"google.golang.org/protobuf/types/known/timestamppb"
 
+	rbderrors "github.com/ceph/ceph-csi/internal/rbd/errors"
 	"github.com/ceph/ceph-csi/internal/rbd/types"
 	"github.com/ceph/ceph-csi/internal/util"
 	"github.com/ceph/ceph-csi/internal/util/log"
@@ -70,7 +71,7 @@ func GetVolumeGroupSnapshot(
 
 	attrs, err := vgs.getVolumeGroupAttributes(ctx)
 	if err != nil {
-		if errors.Is(err, ErrRBDGroupNotFound) {
+		if errors.Is(err, rbderrors.ErrGroupNotFound) {
 			log.ErrorLog(ctx, "%v, returning empty volume group snapshot %q", vgs, err)
 
 			return vgs, err

internal/rbd/group/util.go

@@ -26,6 +26,7 @@ import (
 	"github.com/ceph/go-ceph/rados"
 
 	"github.com/ceph/ceph-csi/internal/journal"
+	rbderrors "github.com/ceph/ceph-csi/internal/rbd/errors"
 	"github.com/ceph/ceph-csi/internal/util"
 	"github.com/ceph/ceph-csi/internal/util/log"
 )
@@ -126,7 +127,7 @@ func (cvg *commonVolumeGroup) generateVolumeGroupFromMapping(
 					}
 					mcsiID.LocationID = mPID
 					err = cvg.generateVolumeGroup(mcsiID)
-					if util.ShouldRetryVolumeGeneration(err) {
+					if ShouldRetryVolumeGroupGeneration(err) {
 						continue
 					}
 
@@ -161,13 +162,13 @@ func (cvg *commonVolumeGroup) initCommonVolumeGroup(
 
 	err = cvg.generateVolumeGroup(csiID)
 	// If the error is not a retryable error, return from here.
-	if err != nil && !util.ShouldRetryVolumeGeneration(err) {
+	if err != nil && !ShouldRetryVolumeGroupGeneration(err) {
 		return err
 	}
 
 	// If the error is a retryable error, we should try to get the cluster mapping
 	// and generate the volume group from the mapping.
-	if util.ShouldRetryVolumeGeneration(err) {
+	if ShouldRetryVolumeGroupGeneration(err) {
 		mapping, err := util.GetClusterMappingInfo(csiID.ClusterID)
 		if err != nil {
 			return err
@@ -229,7 +230,7 @@ func (cvg *commonVolumeGroup) getVolumeGroupAttributes(ctx context.Context) (*jo
 	if attrs.GroupName == "" {
 		log.ErrorLog(ctx, "volume group with id %v not found", cvg.id)
 
-		return nil, ErrRBDGroupNotFound
+		return nil, rbderrors.ErrGroupNotFound
 	}
 
 	cvg.requestName = attrs.RequestName
@@ -356,12 +357,12 @@ func (cvg *commonVolumeGroup) GetIOContext(ctx context.Context) (*rados.IOContex
 
 	conn, err := cvg.getConnection(ctx)
 	if err != nil {
-		return nil, fmt.Errorf("%w: failed to connect: %w", ErrRBDGroupNotConnected, err)
+		return nil, fmt.Errorf("%w: failed to connect: %w", rbderrors.ErrGroupNotConnected, err)
 	}
 
 	ioctx, err := conn.GetIoctx(cvg.pool)
 	if err != nil {
-		return nil, fmt.Errorf("%w: failed to get IOContext: %w", ErrRBDGroupNotConnected, err)
+		return nil, fmt.Errorf("%w: failed to get IOContext: %w", rbderrors.ErrGroupNotConnected, err)
 	}
 
 	if cvg.namespace != "" {
@@ -417,3 +418,28 @@ func (cvg *commonVolumeGroup) GetCreationTime(ctx context.Context) (*time.Time,
 
 	return cvg.creationTime, nil
 }
+
+// ShouldRetryVolumeGroupGeneration determines whether the process of finding or generating
+// volumegroups should continue based on the type of error encountered.
+//
+// It checks if the given error matches any of the following known errors:
+//   - ErrPoolNotFound: The rbd pool where the volumegroup/omap is expected doesn't exist.
+//   - ErrRBDGroupNotFound: The volumegroup doesn't exist in the rbd pool.
+//   - rados.ErrPermissionDenied: Permissions to access the pool is denied.
+//
+// If any of these errors are encountered, the function returns `true`, indicating
+// that the volumegroup search should continue because of known error. Otherwise, it
+// returns `false`, meaning the search should stop.
+//
+// This helper function is used in scenarios where multiple attempts may be made
+// to retrieve or generate volumegroup information, and we want to gracefully handle
+// specific failure cases while retrying for others.
+func ShouldRetryVolumeGroupGeneration(err error) bool {
+	if err == nil {
+		return false // No error, do not retry
+	}
+	// Continue searching for specific known errors
+	return (errors.Is(err, util.ErrPoolNotFound) ||
+		errors.Is(err, rbderrors.ErrGroupNotFound) ||
+		errors.Is(err, rados.ErrPermissionDenied))
+}

internal/rbd/group/util_test.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2025 The Ceph-CSI Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package group
+
+import (
+	"errors"
+	"testing"
+
+	rbderrors "github.com/ceph/ceph-csi/internal/rbd/errors"
+	"github.com/ceph/ceph-csi/internal/util"
+
+	"github.com/ceph/go-ceph/rados"
+)
+
+func Test_shouldRetryVolumeGroupGeneration(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		err error
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "No error (stop searching)",
+			args: args{err: nil},
+			want: false, // No error, stop searching
+		},
+		{
+			name: "ErrPoolNotFound (continue searching)",
+			args: args{err: util.ErrPoolNotFound},
+			want: true, // Known error, continue searching
+		},
+		{
+			name: "ErrRBDGroupNotFound (continue searching)",
+			args: args{err: rbderrors.ErrGroupNotFound},
+			want: true, // Known error, continue searching
+		},
+		{
+			name: "ErrPermissionDenied (continue searching)",
+			args: args{err: rados.ErrPermissionDenied},
+			want: true, // Known error, continue searching
+		},
+		{
+			name: "Different error (stop searching)",
+			args: args{err: errors.New("unknown error")},
+			want: false, // Unknown error, stop searching
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			if got := ShouldRetryVolumeGroupGeneration(tt.args.err); got != tt.want {
+				t.Errorf("ShouldRetryVolumeGeneration() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

internal/rbd/group/volume_group.go

@@ -22,21 +22,16 @@ import (
 	"fmt"
 
 	"github.com/ceph/go-ceph/rados"
-	librados "github.com/ceph/go-ceph/rados"
 	librbd "github.com/ceph/go-ceph/rbd"
 	"github.com/container-storage-interface/spec/lib/go/csi"
 	"github.com/csi-addons/spec/lib/go/volumegroup"
 
+	rbderrors "github.com/ceph/ceph-csi/internal/rbd/errors"
 	"github.com/ceph/ceph-csi/internal/rbd/types"
 	"github.com/ceph/ceph-csi/internal/util"
 	"github.com/ceph/ceph-csi/internal/util/log"
 )
 
-var (
-	ErrRBDGroupNotConnected = fmt.Errorf("%w: RBD group is not connected", librados.ErrNotConnected)
-	ErrRBDGroupNotFound     = fmt.Errorf("%w: RBD group not found", librbd.ErrNotFound)
-)
-
 // volumeGroup handles all requests for 'rbd group' operations.
 type volumeGroup struct {
 	commonVolumeGroup
@@ -77,7 +72,7 @@ func GetVolumeGroup(
 
 	attrs, err := vg.getVolumeGroupAttributes(ctx)
 	if err != nil {
-		if errors.Is(err, ErrRBDGroupNotFound) {
+		if errors.Is(err, rbderrors.ErrGroupNotFound) {
 			log.ErrorLog(ctx, "%v, returning empty volume group %q", vg, err)
 
 			return vg, err