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persistence_crc.go
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/
persistence_crc.go
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// Copyright 2018 The Chubao 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 storage
import (
"encoding/binary"
"sync/atomic"
"github.com/chubaofs/chubaofs/util"
"github.com/chubaofs/chubaofs/util/log"
)
type BlockCrc struct {
BlockNo int
Crc uint32
}
type BlockCrcArr []*BlockCrc
const (
BaseExtentIDOffset = 0
)
func (arr BlockCrcArr) Len() int { return len(arr) }
func (arr BlockCrcArr) Less(i, j int) bool { return arr[i].BlockNo < arr[j].BlockNo }
func (arr BlockCrcArr) Swap(i, j int) { arr[i], arr[j] = arr[j], arr[i] }
type UpdateCrcFunc func(e *Extent, blockNo int, crc uint32) (err error)
type GetExtentCrcFunc func(extentID uint64) (crc uint32, err error)
func (s *ExtentStore) PersistenceBlockCrc(e *Extent, blockNo int, blockCrc uint32) (err error) {
startIdx := blockNo * util.PerBlockCrcSize
endIdx := startIdx + util.PerBlockCrcSize
binary.BigEndian.PutUint32(e.header[startIdx:endIdx], blockCrc)
verifyStart := startIdx + int(util.BlockHeaderSize*e.extentID)
if _, err = s.verifyExtentFp.WriteAt(e.header[startIdx:endIdx], int64(verifyStart)); err != nil {
return
}
return
}
func (s *ExtentStore) DeleteBlockCrc(extentID uint64) (err error) {
err = fallocate(int(s.verifyExtentFp.Fd()), FallocFLPunchHole|FallocFLKeepSize,
int64(util.BlockHeaderSize*extentID), util.BlockHeaderSize)
return
}
func (s *ExtentStore) PersistenceBaseExtentID(extentID uint64) (err error) {
value := make([]byte, 8)
binary.BigEndian.PutUint64(value, extentID)
_, err = s.metadataFp.WriteAt(value, BaseExtentIDOffset)
return
}
func (s *ExtentStore) GetPreAllocSpaceExtentIDOnVerfiyFile() (extentID uint64) {
value := make([]byte, 8)
_, err := s.metadataFp.WriteAt(value, 8)
if err != nil {
return
}
extentID = binary.BigEndian.Uint64(value)
return
}
func (s *ExtentStore) PreAllocSpaceOnVerfiyFile(currExtentID uint64) {
if currExtentID > atomic.LoadUint64(&s.hasAllocSpaceExtentIDOnVerfiyFile) {
prevAllocSpaceExtentID := int64(atomic.LoadUint64(&s.hasAllocSpaceExtentIDOnVerfiyFile))
endAllocSpaceExtentID := int64(prevAllocSpaceExtentID + 1000)
size := int64(1000 * util.BlockHeaderSize)
err := fallocate(int(s.verifyExtentFp.Fd()), 1, prevAllocSpaceExtentID*util.BlockHeaderSize, size)
if err != nil {
return
}
data := make([]byte, 8)
binary.BigEndian.PutUint64(data, uint64(endAllocSpaceExtentID))
if _, err = s.metadataFp.WriteAt(data, 8); err != nil {
return
}
atomic.StoreUint64(&s.hasAllocSpaceExtentIDOnVerfiyFile, uint64(endAllocSpaceExtentID))
log.LogInfof("Action(PreAllocSpaceOnVerfiyFile) PartitionID(%v) currentExtent(%v)"+
"PrevAllocSpaceExtentIDOnVerifyFile(%v) EndAllocSpaceExtentIDOnVerifyFile(%v)"+
" has allocSpaceOnVerifyFile to (%v)", s.partitionID, currExtentID, prevAllocSpaceExtentID, endAllocSpaceExtentID,
prevAllocSpaceExtentID*util.BlockHeaderSize+size)
}
return
}
func (s *ExtentStore) GetPersistenceBaseExtentID() (extentID uint64, err error) {
data := make([]byte, 8)
_, err = s.metadataFp.ReadAt(data, 0)
if err != nil {
return
}
extentID = binary.BigEndian.Uint64(data)
return
}
func (s *ExtentStore) PersistenceHasDeleteExtent(extentID uint64) (err error) {
data := make([]byte, 8)
binary.BigEndian.PutUint64(data, extentID)
if _, err = s.normalExtentDeleteFp.Write(data); err != nil {
return
}
return
}