pv_validation.go

Documentation: k8s.io/kubernetes/pkg/volume/validation

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package validation
    18  
    19  import (
    20  	"errors"
    21  	"path/filepath"
    22  	"strings"
    23  
    24  	"k8s.io/apimachinery/pkg/util/validation/field"
    25  	api "k8s.io/kubernetes/pkg/apis/core"
    26  )
    27  
    28  // ValidatePersistentVolume validates PV object for plugin specific validation
    29  // We can put here validations which are specific to volume types.
    30  func ValidatePersistentVolume(pv *api.PersistentVolume) field.ErrorList {
    31  	return checkMountOption(pv)
    32  }
    33  
    34  func checkMountOption(pv *api.PersistentVolume) field.ErrorList {
    35  	allErrs := field.ErrorList{}
    36  	// if PV is of these types we don't return errors
    37  	// since mount options is supported
    38  	if pv.Spec.GCEPersistentDisk != nil ||
    39  		pv.Spec.AWSElasticBlockStore != nil ||
    40  		pv.Spec.Glusterfs != nil ||
    41  		pv.Spec.NFS != nil ||
    42  		pv.Spec.RBD != nil ||
    43  		pv.Spec.Quobyte != nil ||
    44  		pv.Spec.ISCSI != nil ||
    45  		pv.Spec.Cinder != nil ||
    46  		pv.Spec.CephFS != nil ||
    47  		pv.Spec.AzureFile != nil ||
    48  		pv.Spec.VsphereVolume != nil ||
    49  		pv.Spec.AzureDisk != nil ||
    50  		pv.Spec.PhotonPersistentDisk != nil {
    51  		return allErrs
    52  	}
    53  	// any other type if mount option is present lets return error
    54  	if _, ok := pv.Annotations[api.MountOptionAnnotation]; ok {
    55  		metaField := field.NewPath("metadata")
    56  		allErrs = append(allErrs, field.Forbidden(metaField.Child("annotations", api.MountOptionAnnotation), "may not specify mount options for this volume type"))
    57  	}
    58  	return allErrs
    59  }
    60  
    61  // ValidatePathNoBacksteps will make sure the targetPath does not have any element which is ".."
    62  func ValidatePathNoBacksteps(targetPath string) error {
    63  	parts := strings.Split(filepath.ToSlash(targetPath), "/")
    64  	for _, item := range parts {
    65  		if item == ".." {
    66  			return errors.New("must not contain '..'")
    67  		}
    68  	}
    69  
    70  	return nil
    71  }
    72
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