/
partition.go
91 lines (78 loc) · 2.47 KB
/
partition.go
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// Copyright 2020 Red Hat, Inc.
//
// 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 types
import (
"fmt"
"regexp"
"strings"
"github.com/coreos/ignition/v2/config/shared/errors"
"github.com/coreos/ignition/v2/config/util"
"github.com/coreos/vcontext/path"
"github.com/coreos/vcontext/report"
)
const (
guidRegexStr = "^(|[[:xdigit:]]{8}-[[:xdigit:]]{4}-[[:xdigit:]]{4}-[[:xdigit:]]{4}-[[:xdigit:]]{12})$"
)
var (
guidRegex = regexp.MustCompile(guidRegexStr)
)
func (p Partition) Key() string {
if p.Number != 0 {
return fmt.Sprintf("number:%d", p.Number)
} else if p.Label != nil {
return fmt.Sprintf("label:%s", *p.Label)
} else {
return ""
}
}
func (p Partition) Validate(c path.ContextPath) (r report.Report) {
if util.IsFalse(p.ShouldExist) &&
(p.Label != nil || util.NotEmpty(p.TypeGUID) || util.NotEmpty(p.GUID) || p.StartMiB != nil || p.SizeMiB != nil) {
r.AddOnError(c, errors.ErrShouldNotExistWithOthers)
}
if p.Number == 0 && p.Label == nil {
r.AddOnError(c, errors.ErrNeedLabelOrNumber)
}
r.AddOnError(c.Append("label"), p.validateLabel())
r.AddOnError(c.Append("guid"), validateGUID(p.GUID))
r.AddOnError(c.Append("typeGuid"), validateGUID(p.TypeGUID))
return
}
func (p Partition) validateLabel() error {
if p.Label == nil {
return nil
}
// http://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_entries:
// 56 (0x38) 72 bytes Partition name (36 UTF-16LE code units)
// XXX(vc): note GPT calls it a name, we're using label for consistency
// with udev naming /dev/disk/by-partlabel/*.
if len(*p.Label) > 36 {
return errors.ErrLabelTooLong
}
// sgdisk uses colons for delimitting compound arguments and does not allow escaping them.
if strings.Contains(*p.Label, ":") {
return errors.ErrLabelContainsColon
}
return nil
}
func validateGUID(guidPointer *string) error {
if guidPointer == nil {
return nil
}
guid := *guidPointer
if ok := guidRegex.MatchString(guid); !ok {
return errors.ErrDoesntMatchGUIDRegex
}
return nil
}