1 // Copyright 2015 The etcd Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package walpb 16 17 import "errors" 18 19 var ( 20 ErrCRCMismatch = errors.New("walpb: crc mismatch") 21 ) 22 23 func (rec *Record) Validate(crc uint32) error { 24 if rec.Crc == crc { 25 return nil 26 } 27 rec.Reset() 28 return ErrCRCMismatch 29 } 30 31 // ValidateSnapshotForWrite ensures the Snapshot the newly written snapshot is valid. 32 // 33 // There might exist log-entries written by old etcd versions that does not conform 34 // to the requirements. 35 func ValidateSnapshotForWrite(e *Snapshot) error { 36 // Since etcd>=3.5.0 37 if e.ConfState == nil && e.Index > 0 { 38 return errors.New("Saved (not-initial) snapshot is missing ConfState: " + e.String()) 39 } 40 return nil 41 } 42