You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
413 lines
11 KiB
413 lines
11 KiB
package storage
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"path"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/chrislusf/weed-fs/go/glog"
|
|
)
|
|
|
|
type Volume struct {
|
|
Id VolumeId
|
|
dir string
|
|
Collection string
|
|
dataFile *os.File
|
|
nm NeedleMapper
|
|
readOnly bool
|
|
|
|
SuperBlock
|
|
|
|
accessLock sync.Mutex
|
|
lastModifiedTime uint64 //unix time in seconds
|
|
}
|
|
|
|
func NewVolume(dirname string, collection string, id VolumeId, replicaPlacement *ReplicaPlacement, ttl *TTL) (v *Volume, e error) {
|
|
v = &Volume{dir: dirname, Collection: collection, Id: id}
|
|
v.SuperBlock = SuperBlock{ReplicaPlacement: replicaPlacement, Ttl: ttl}
|
|
e = v.load(true, true)
|
|
return
|
|
}
|
|
func (v *Volume) String() string {
|
|
return fmt.Sprintf("Id:%v, dir:%s, Collection:%s, dataFile:%v, nm:%v, readOnly:%v", v.Id, v.dir, v.Collection, v.dataFile, v.nm, v.readOnly)
|
|
}
|
|
|
|
func loadVolumeWithoutIndex(dirname string, collection string, id VolumeId) (v *Volume, e error) {
|
|
v = &Volume{dir: dirname, Collection: collection, Id: id}
|
|
v.SuperBlock = SuperBlock{}
|
|
e = v.load(false, false)
|
|
return
|
|
}
|
|
func (v *Volume) FileName() (fileName string) {
|
|
if v.Collection == "" {
|
|
fileName = path.Join(v.dir, v.Id.String())
|
|
} else {
|
|
fileName = path.Join(v.dir, v.Collection+"_"+v.Id.String())
|
|
}
|
|
return
|
|
}
|
|
func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool) error {
|
|
var e error
|
|
fileName := v.FileName()
|
|
|
|
if exists, canRead, canWrite, modifiedTime := checkFile(fileName + ".dat"); exists {
|
|
if !canRead {
|
|
return fmt.Errorf("cannot read Volume Data file %s.dat", fileName)
|
|
}
|
|
if canWrite {
|
|
v.dataFile, e = os.OpenFile(fileName+".dat", os.O_RDWR|os.O_CREATE, 0644)
|
|
v.lastModifiedTime = uint64(modifiedTime.Unix())
|
|
} else {
|
|
glog.V(0).Infoln("opening " + fileName + ".dat in READONLY mode")
|
|
v.dataFile, e = os.Open(fileName + ".dat")
|
|
v.readOnly = true
|
|
}
|
|
} else {
|
|
if createDatIfMissing {
|
|
v.dataFile, e = os.OpenFile(fileName+".dat", os.O_RDWR|os.O_CREATE, 0644)
|
|
} else {
|
|
return fmt.Errorf("Volume Data file %s.dat does not exist.", fileName)
|
|
}
|
|
}
|
|
|
|
if e != nil {
|
|
if !os.IsPermission(e) {
|
|
return fmt.Errorf("cannot load Volume Data %s.dat: %v", fileName, e)
|
|
}
|
|
}
|
|
|
|
if v.ReplicaPlacement == nil {
|
|
e = v.readSuperBlock()
|
|
} else {
|
|
e = v.maybeWriteSuperBlock()
|
|
}
|
|
if e == nil && alsoLoadIndex {
|
|
if v.readOnly {
|
|
if v.ensureConvertIdxToCdb(fileName) {
|
|
v.nm, e = OpenCdbMap(fileName + ".cdb")
|
|
return e
|
|
}
|
|
}
|
|
var indexFile *os.File
|
|
if v.readOnly {
|
|
glog.V(1).Infoln("open to read file", fileName+".idx")
|
|
if indexFile, e = os.OpenFile(fileName+".idx", os.O_RDONLY, 0644); e != nil {
|
|
return fmt.Errorf("cannot read Volume Index %s.idx: %v", fileName, e)
|
|
}
|
|
} else {
|
|
glog.V(1).Infoln("open to write file", fileName+".idx")
|
|
if indexFile, e = os.OpenFile(fileName+".idx", os.O_RDWR|os.O_CREATE, 0644); e != nil {
|
|
return fmt.Errorf("cannot write Volume Index %s.idx: %v", fileName, e)
|
|
}
|
|
}
|
|
glog.V(0).Infoln("loading file", fileName+".idx", "readonly", v.readOnly)
|
|
if v.nm, e = LoadNeedleMap(indexFile); e != nil {
|
|
glog.V(0).Infoln("loading error:", e)
|
|
}
|
|
}
|
|
return e
|
|
}
|
|
func (v *Volume) Version() Version {
|
|
return v.SuperBlock.Version()
|
|
}
|
|
func (v *Volume) Size() int64 {
|
|
stat, e := v.dataFile.Stat()
|
|
if e == nil {
|
|
return stat.Size()
|
|
}
|
|
glog.V(0).Infof("Failed to read file size %s %v", v.dataFile.Name(), e)
|
|
return -1
|
|
}
|
|
func (v *Volume) Close() {
|
|
v.accessLock.Lock()
|
|
defer v.accessLock.Unlock()
|
|
v.nm.Close()
|
|
_ = v.dataFile.Close()
|
|
}
|
|
func (v *Volume) NeedToReplicate() bool {
|
|
return v.ReplicaPlacement.GetCopyCount() > 1
|
|
}
|
|
|
|
func (v *Volume) isFileUnchanged(n *Needle) bool {
|
|
nv, ok := v.nm.Get(n.Id)
|
|
if ok && nv.Offset > 0 {
|
|
oldNeedle := new(Needle)
|
|
oldNeedle.Read(v.dataFile, int64(nv.Offset)*NeedlePaddingSize, nv.Size, v.Version())
|
|
if oldNeedle.Checksum == n.Checksum && bytes.Equal(oldNeedle.Data, n.Data) {
|
|
n.DataSize = oldNeedle.DataSize
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (v *Volume) Destroy() (err error) {
|
|
if v.readOnly {
|
|
err = fmt.Errorf("%s is read-only", v.dataFile.Name())
|
|
return
|
|
}
|
|
v.Close()
|
|
err = os.Remove(v.dataFile.Name())
|
|
if err != nil {
|
|
return
|
|
}
|
|
err = v.nm.Destroy()
|
|
return
|
|
}
|
|
|
|
func (v *Volume) write(n *Needle) (size uint32, err error) {
|
|
glog.V(4).Infof("writing needle %s", NewFileIdFromNeedle(v.Id, n).String())
|
|
if v.readOnly {
|
|
err = fmt.Errorf("%s is read-only", v.dataFile.Name())
|
|
return
|
|
}
|
|
v.accessLock.Lock()
|
|
defer v.accessLock.Unlock()
|
|
if v.isFileUnchanged(n) {
|
|
size = n.DataSize
|
|
glog.V(4).Infof("needle is unchanged!")
|
|
return
|
|
}
|
|
var offset int64
|
|
if offset, err = v.dataFile.Seek(0, 2); err != nil {
|
|
glog.V(0).Infof("failed to seek the end of file: %v", err)
|
|
return
|
|
}
|
|
|
|
//ensure file writing starting from aligned positions
|
|
if offset%NeedlePaddingSize != 0 {
|
|
offset = offset + (NeedlePaddingSize - offset%NeedlePaddingSize)
|
|
if offset, err = v.dataFile.Seek(offset, 0); err != nil {
|
|
glog.V(0).Infof("failed to align in datafile %s: %v", v.dataFile.Name(), err)
|
|
return
|
|
}
|
|
}
|
|
|
|
if size, err = n.Append(v.dataFile, v.Version()); err != nil {
|
|
if e := v.dataFile.Truncate(offset); e != nil {
|
|
err = fmt.Errorf("%s\ncannot truncate %s: %v", err, v.dataFile.Name(), e)
|
|
}
|
|
return
|
|
}
|
|
nv, ok := v.nm.Get(n.Id)
|
|
if !ok || int64(nv.Offset)*NeedlePaddingSize < offset {
|
|
if _, err = v.nm.Put(n.Id, uint32(offset/NeedlePaddingSize), n.Size); err != nil {
|
|
glog.V(4).Infof("failed to save in needle map %d: %v", n.Id, err)
|
|
}
|
|
}
|
|
if v.lastModifiedTime < n.LastModified {
|
|
v.lastModifiedTime = n.LastModified
|
|
}
|
|
return
|
|
}
|
|
|
|
func (v *Volume) delete(n *Needle) (uint32, error) {
|
|
glog.V(4).Infof("delete needle %s", NewFileIdFromNeedle(v.Id, n).String())
|
|
if v.readOnly {
|
|
return 0, fmt.Errorf("%s is read-only", v.dataFile.Name())
|
|
}
|
|
v.accessLock.Lock()
|
|
defer v.accessLock.Unlock()
|
|
nv, ok := v.nm.Get(n.Id)
|
|
//fmt.Println("key", n.Id, "volume offset", nv.Offset, "data_size", n.Size, "cached size", nv.Size)
|
|
if ok {
|
|
size := nv.Size
|
|
if err := v.nm.Delete(n.Id); err != nil {
|
|
return size, err
|
|
}
|
|
if _, err := v.dataFile.Seek(0, 2); err != nil {
|
|
return size, err
|
|
}
|
|
n.Data = make([]byte, 0)
|
|
_, err := n.Append(v.dataFile, v.Version())
|
|
return size, err
|
|
}
|
|
return 0, nil
|
|
}
|
|
|
|
func (v *Volume) read(n *Needle) (int, error) {
|
|
nv, ok := v.nm.Get(n.Id)
|
|
if !ok || nv.Offset == 0 {
|
|
return -1, errors.New("Not Found")
|
|
}
|
|
bytesRead, err := n.Read(v.dataFile, int64(nv.Offset)*NeedlePaddingSize, nv.Size, v.Version())
|
|
if err != nil {
|
|
return bytesRead, err
|
|
}
|
|
if !n.HasTtl() {
|
|
return bytesRead, err
|
|
}
|
|
ttlMinutes := n.Ttl.Minutes()
|
|
if ttlMinutes == 0 {
|
|
return bytesRead, nil
|
|
}
|
|
if !n.HasLastModifiedDate() {
|
|
return bytesRead, nil
|
|
}
|
|
if uint64(time.Now().Unix()) < n.LastModified+uint64(ttlMinutes*60) {
|
|
return bytesRead, nil
|
|
}
|
|
return -1, errors.New("Not Found")
|
|
}
|
|
|
|
func (v *Volume) freeze() error {
|
|
if v.readOnly {
|
|
return nil
|
|
}
|
|
nm, ok := v.nm.(*NeedleMap)
|
|
if !ok {
|
|
return nil
|
|
}
|
|
v.accessLock.Lock()
|
|
defer v.accessLock.Unlock()
|
|
bn, _ := baseFilename(v.dataFile.Name())
|
|
cdbFn := bn + ".cdb"
|
|
glog.V(0).Infof("converting %s to %s", nm.indexFile.Name(), cdbFn)
|
|
err := DumpNeedleMapToCdb(cdbFn, nm)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if v.nm, err = OpenCdbMap(cdbFn); err != nil {
|
|
return err
|
|
}
|
|
nm.indexFile.Close()
|
|
os.Remove(nm.indexFile.Name())
|
|
v.readOnly = true
|
|
return nil
|
|
}
|
|
|
|
func ScanVolumeFile(dirname string, collection string, id VolumeId,
|
|
visitSuperBlock func(SuperBlock) error,
|
|
readNeedleBody bool,
|
|
visitNeedle func(n *Needle, offset int64) error) (err error) {
|
|
var v *Volume
|
|
if v, err = loadVolumeWithoutIndex(dirname, collection, id); err != nil {
|
|
return fmt.Errorf("Failed to load volume %d: %v", id, err)
|
|
}
|
|
if err = visitSuperBlock(v.SuperBlock); err != nil {
|
|
return fmt.Errorf("Failed to read volume %d super block: %v", id, err)
|
|
}
|
|
|
|
version := v.Version()
|
|
|
|
offset := int64(SuperBlockSize)
|
|
n, rest, e := ReadNeedleHeader(v.dataFile, version, offset)
|
|
if e != nil {
|
|
err = fmt.Errorf("cannot read needle header: %v", e)
|
|
return
|
|
}
|
|
for n != nil {
|
|
if readNeedleBody {
|
|
if err = n.ReadNeedleBody(v.dataFile, version, offset+int64(NeedleHeaderSize), rest); err != nil {
|
|
err = fmt.Errorf("cannot read needle body: %v", err)
|
|
return
|
|
}
|
|
}
|
|
if err = visitNeedle(n, offset); err != nil {
|
|
return
|
|
}
|
|
offset += int64(NeedleHeaderSize) + int64(rest)
|
|
if n, rest, err = ReadNeedleHeader(v.dataFile, version, offset); err != nil {
|
|
if err == io.EOF {
|
|
return nil
|
|
}
|
|
return fmt.Errorf("cannot read needle header: %v", err)
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (v *Volume) ContentSize() uint64 {
|
|
return v.nm.ContentSize()
|
|
}
|
|
|
|
func checkFile(filename string) (exists, canRead, canWrite bool, modTime time.Time) {
|
|
exists = true
|
|
fi, err := os.Stat(filename)
|
|
if os.IsNotExist(err) {
|
|
exists = false
|
|
return
|
|
}
|
|
if fi.Mode()&0400 != 0 {
|
|
canRead = true
|
|
}
|
|
if fi.Mode()&0200 != 0 {
|
|
canWrite = true
|
|
}
|
|
modTime = fi.ModTime()
|
|
return
|
|
}
|
|
func (v *Volume) ensureConvertIdxToCdb(fileName string) (cdbCanRead bool) {
|
|
var indexFile *os.File
|
|
var e error
|
|
_, cdbCanRead, cdbCanWrite, cdbModTime := checkFile(fileName + ".cdb")
|
|
_, idxCanRead, _, idxModeTime := checkFile(fileName + ".idx")
|
|
if cdbCanRead && cdbModTime.After(idxModeTime) {
|
|
return true
|
|
}
|
|
if !cdbCanWrite {
|
|
return false
|
|
}
|
|
if !idxCanRead {
|
|
glog.V(0).Infoln("Can not read file", fileName+".idx!")
|
|
return false
|
|
}
|
|
glog.V(2).Infoln("opening file", fileName+".idx")
|
|
if indexFile, e = os.Open(fileName + ".idx"); e != nil {
|
|
glog.V(0).Infoln("Failed to read file", fileName+".idx !")
|
|
return false
|
|
}
|
|
defer indexFile.Close()
|
|
glog.V(0).Infof("converting %s.idx to %s.cdb", fileName, fileName)
|
|
if e = ConvertIndexToCdb(fileName+".cdb", indexFile); e != nil {
|
|
glog.V(0).Infof("error converting %s.idx to %s.cdb: %v", fileName, fileName, e)
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// volume is expired if modified time + volume ttl < now
|
|
// except when volume is empty
|
|
// or when the volume does not have a ttl
|
|
// or when volumeSizeLimit is 0 when server just starts
|
|
func (v *Volume) expired(volumeSizeLimit uint64) bool {
|
|
if volumeSizeLimit == 0 {
|
|
//skip if we don't know size limit
|
|
return false
|
|
}
|
|
if v.ContentSize() == 0 {
|
|
return false
|
|
}
|
|
if v.Ttl == nil || v.Ttl.Minutes() == 0 {
|
|
return false
|
|
}
|
|
glog.V(0).Infof("now:%v lastModified:%v", time.Now().Unix(), v.lastModifiedTime)
|
|
livedMinutes := (time.Now().Unix() - int64(v.lastModifiedTime)) / 60
|
|
glog.V(0).Infof("ttl:%v lived:%v", v.Ttl, livedMinutes)
|
|
if int64(v.Ttl.Minutes()) < livedMinutes {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// wait either maxDelayMinutes or 10% of ttl minutes
|
|
func (v *Volume) exiredLongEnough(maxDelayMinutes uint32) bool {
|
|
if v.Ttl == nil || v.Ttl.Minutes() == 0 {
|
|
return false
|
|
}
|
|
removalDelay := v.Ttl.Minutes() / 10
|
|
if removalDelay > maxDelayMinutes {
|
|
removalDelay = maxDelayMinutes
|
|
}
|
|
|
|
if uint64(v.Ttl.Minutes()+removalDelay)*60+v.lastModifiedTime < uint64(time.Now().Unix()) {
|
|
return true
|
|
}
|
|
return false
|
|
}
|