2011-12-16 22:51:26 +08:00
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package storage
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import (
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2013-07-14 04:51:47 +08:00
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"bytes"
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2014-09-25 00:47:09 +08:00
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"github.com/aszxqw/weed-fs/go/glog"
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2012-11-07 17:51:43 +08:00
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"errors"
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2012-11-20 17:45:36 +08:00
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"fmt"
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2013-01-21 11:44:23 +08:00
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"io"
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2011-12-16 22:51:26 +08:00
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"os"
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"path"
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2011-12-24 16:40:56 +08:00
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"sync"
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2013-08-13 07:53:32 +08:00
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"time"
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2011-12-16 22:51:26 +08:00
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)
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type Volume struct {
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2013-11-12 18:21:22 +08:00
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Id VolumeId
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dir string
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Collection string
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dataFile *os.File
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nm NeedleMapper
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readOnly bool
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2011-12-16 22:51:26 +08:00
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2013-01-21 11:44:23 +08:00
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SuperBlock
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2012-11-20 17:45:36 +08:00
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2014-09-21 03:38:59 +08:00
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accessLock sync.Mutex
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lastModifiedTime uint64 //unix time in seconds
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2011-12-16 22:51:26 +08:00
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}
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2014-09-21 03:38:59 +08:00
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func NewVolume(dirname string, collection string, id VolumeId, replicaPlacement *ReplicaPlacement, ttl *TTL) (v *Volume, e error) {
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2013-11-12 18:21:22 +08:00
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v = &Volume{dir: dirname, Collection: collection, Id: id}
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2014-09-21 03:38:59 +08:00
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v.SuperBlock = SuperBlock{ReplicaPlacement: replicaPlacement, Ttl: ttl}
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2014-02-07 09:32:06 +08:00
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e = v.load(true, true)
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2013-01-21 11:44:23 +08:00
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return
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}
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2013-11-12 18:21:22 +08:00
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func loadVolumeWithoutIndex(dirname string, collection string, id VolumeId) (v *Volume, e error) {
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v = &Volume{dir: dirname, Collection: collection, Id: id}
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2014-03-03 14:16:54 +08:00
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v.SuperBlock = SuperBlock{}
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2014-02-07 09:32:06 +08:00
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e = v.load(false, false)
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2012-11-07 17:51:43 +08:00
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return
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}
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2014-01-22 12:51:46 +08:00
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func (v *Volume) FileName() (fileName string) {
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2014-02-07 09:32:06 +08:00
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if v.Collection == "" {
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fileName = path.Join(v.dir, v.Id.String())
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} else {
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fileName = path.Join(v.dir, v.Collection+"_"+v.Id.String())
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}
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return
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2014-01-22 12:51:46 +08:00
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}
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2014-02-07 09:32:06 +08:00
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func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool) error {
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2012-11-07 17:51:43 +08:00
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var e error
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2014-01-22 12:51:46 +08:00
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fileName := v.FileName()
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2014-02-07 09:32:06 +08:00
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2014-09-21 03:38:59 +08:00
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if exists, canRead, canWrite, modifiedTime := checkFile(fileName + ".dat"); exists {
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2014-02-07 09:32:06 +08:00
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if !canRead {
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return fmt.Errorf("cannot read Volume Data file %s.dat", fileName)
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}
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if canWrite {
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v.dataFile, e = os.OpenFile(fileName+".dat", os.O_RDWR|os.O_CREATE, 0644)
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2014-09-21 03:38:59 +08:00
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v.lastModifiedTime = uint64(modifiedTime.Unix())
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2014-02-07 09:32:06 +08:00
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} else {
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glog.V(0).Infoln("opening " + fileName + ".dat in READONLY mode")
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v.dataFile, e = os.Open(fileName + ".dat")
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v.readOnly = true
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}
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2013-08-13 14:48:10 +08:00
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} else {
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2014-02-07 09:32:06 +08:00
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if createDatIfMissing {
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v.dataFile, e = os.OpenFile(fileName+".dat", os.O_RDWR|os.O_CREATE, 0644)
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} else {
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return fmt.Errorf("Volume Data file %s.dat does not exist.", fileName)
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}
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2013-08-13 07:53:32 +08:00
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}
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2014-02-07 09:32:06 +08:00
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2011-12-16 22:51:26 +08:00
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if e != nil {
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2013-04-15 10:30:26 +08:00
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if !os.IsPermission(e) {
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2013-08-13 07:53:32 +08:00
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return fmt.Errorf("cannot load Volume Data %s.dat: %s", fileName, e.Error())
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2013-04-15 10:30:26 +08:00
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}
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2011-12-16 22:51:26 +08:00
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}
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2013-08-13 07:53:32 +08:00
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2014-03-03 14:16:54 +08:00
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if v.ReplicaPlacement == nil {
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2013-02-11 06:00:06 +08:00
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e = v.readSuperBlock()
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2012-09-13 16:33:47 +08:00
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} else {
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2013-02-11 06:00:06 +08:00
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e = v.maybeWriteSuperBlock()
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2012-09-13 16:33:47 +08:00
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}
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2013-02-11 06:00:06 +08:00
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if e == nil && alsoLoadIndex {
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2013-06-20 09:10:38 +08:00
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if v.readOnly {
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2013-08-13 07:53:32 +08:00
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if v.ensureConvertIdxToCdb(fileName) {
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v.nm, e = OpenCdbMap(fileName + ".cdb")
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return e
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2013-06-20 09:10:38 +08:00
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}
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}
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2013-08-13 07:53:32 +08:00
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var indexFile *os.File
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2013-08-12 02:38:55 +08:00
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if v.readOnly {
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glog.V(1).Infoln("open to read file", fileName+".idx")
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2013-08-13 07:53:32 +08:00
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if indexFile, e = os.OpenFile(fileName+".idx", os.O_RDONLY, 0644); e != nil {
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2014-03-19 19:48:13 +08:00
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return fmt.Errorf("cannot read Volume Index %s.idx: %s", fileName, e.Error())
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2013-08-12 02:38:55 +08:00
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}
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} else {
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glog.V(1).Infoln("open to write file", fileName+".idx")
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2013-08-13 07:53:32 +08:00
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if indexFile, e = os.OpenFile(fileName+".idx", os.O_RDWR|os.O_CREATE, 0644); e != nil {
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2014-03-19 19:48:13 +08:00
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return fmt.Errorf("cannot write Volume Index %s.idx: %s", fileName, e.Error())
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2013-08-12 02:38:55 +08:00
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}
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}
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glog.V(0).Infoln("loading file", fileName+".idx", "readonly", v.readOnly)
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if v.nm, e = LoadNeedleMap(indexFile); e != nil {
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glog.V(0).Infoln("loading error:", e)
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2013-08-09 14:57:22 +08:00
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}
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2011-12-16 22:51:26 +08:00
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}
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2013-02-11 06:00:06 +08:00
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return e
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2011-12-16 22:51:26 +08:00
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}
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2012-12-18 09:51:39 +08:00
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func (v *Volume) Version() Version {
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2014-08-26 02:37:00 +08:00
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return v.SuperBlock.Version()
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2012-12-18 09:51:39 +08:00
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}
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2011-12-18 15:22:04 +08:00
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func (v *Volume) Size() int64 {
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2011-12-22 12:04:47 +08:00
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stat, e := v.dataFile.Stat()
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if e == nil {
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2012-06-29 15:53:47 +08:00
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return stat.Size()
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2011-12-22 12:04:47 +08:00
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}
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2013-08-09 14:57:22 +08:00
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glog.V(0).Infof("Failed to read file size %s %s", v.dataFile.Name(), e.Error())
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2011-12-22 12:04:47 +08:00
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return -1
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2011-12-17 14:47:23 +08:00
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}
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2011-12-16 22:51:26 +08:00
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func (v *Volume) Close() {
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2012-12-21 14:32:21 +08:00
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v.accessLock.Lock()
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defer v.accessLock.Unlock()
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2011-12-22 12:04:47 +08:00
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v.nm.Close()
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2013-02-27 14:54:22 +08:00
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_ = v.dataFile.Close()
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2011-12-16 22:51:26 +08:00
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}
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2012-11-20 16:54:37 +08:00
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func (v *Volume) NeedToReplicate() bool {
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2014-03-03 14:16:54 +08:00
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return v.ReplicaPlacement.GetCopyCount() > 1
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2012-11-12 17:26:18 +08:00
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}
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2011-12-16 22:51:26 +08:00
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2013-07-12 13:44:59 +08:00
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func (v *Volume) isFileUnchanged(n *Needle) bool {
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nv, ok := v.nm.Get(n.Id)
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if ok && nv.Offset > 0 {
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oldNeedle := new(Needle)
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2014-03-19 14:48:01 +08:00
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oldNeedle.Read(v.dataFile, int64(nv.Offset)*NeedlePaddingSize, nv.Size, v.Version())
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2013-07-14 04:51:47 +08:00
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if oldNeedle.Checksum == n.Checksum && bytes.Equal(oldNeedle.Data, n.Data) {
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2013-07-12 13:44:59 +08:00
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n.Size = oldNeedle.Size
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return true
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}
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}
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return false
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}
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2014-03-11 02:43:54 +08:00
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func (v *Volume) Destroy() (err error) {
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if v.readOnly {
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2014-04-17 15:16:44 +08:00
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err = fmt.Errorf("%s is read-only", v.dataFile.Name())
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2014-03-11 02:43:54 +08:00
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return
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}
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v.Close()
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err = os.Remove(v.dataFile.Name())
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if err != nil {
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return
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}
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err = v.nm.Destroy()
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return
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}
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2013-01-20 19:40:04 +08:00
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func (v *Volume) write(n *Needle) (size uint32, err error) {
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2014-03-24 12:57:10 +08:00
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glog.V(4).Infof("writing needle %s", NewFileIdFromNeedle(v.Id, n).String())
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2013-04-15 10:30:26 +08:00
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if v.readOnly {
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2014-04-17 15:16:44 +08:00
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err = fmt.Errorf("%s is read-only", v.dataFile.Name())
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2013-04-15 10:30:26 +08:00
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return
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}
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2011-12-24 16:40:56 +08:00
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v.accessLock.Lock()
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defer v.accessLock.Unlock()
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2013-07-12 13:44:59 +08:00
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if v.isFileUnchanged(n) {
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size = n.Size
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2013-11-01 03:55:19 +08:00
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glog.V(4).Infof("needle is unchanged!")
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2013-07-12 13:44:59 +08:00
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return
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}
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2013-01-20 19:40:04 +08:00
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var offset int64
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if offset, err = v.dataFile.Seek(0, 2); err != nil {
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return
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}
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2013-07-06 07:05:35 +08:00
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//ensure file writing starting from aligned positions
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if offset%NeedlePaddingSize != 0 {
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offset = offset + (NeedlePaddingSize - offset%NeedlePaddingSize)
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if offset, err = v.dataFile.Seek(offset, 0); err != nil {
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2013-11-01 03:55:19 +08:00
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glog.V(4).Infof("failed to align in datafile %s: %s", v.dataFile.Name(), err.Error())
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2013-07-06 07:05:35 +08:00
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return
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}
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}
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2013-01-21 11:44:23 +08:00
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if size, err = n.Append(v.dataFile, v.Version()); err != nil {
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2013-02-27 14:54:22 +08:00
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if e := v.dataFile.Truncate(offset); e != nil {
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2014-04-17 15:16:44 +08:00
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err = fmt.Errorf("%s\ncannot truncate %s: %s", err, v.dataFile.Name(), e.Error())
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2013-02-27 14:54:22 +08:00
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}
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2013-01-20 19:40:04 +08:00
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return
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}
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2012-08-24 14:06:15 +08:00
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nv, ok := v.nm.Get(n.Id)
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2013-01-20 19:40:04 +08:00
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if !ok || int64(nv.Offset)*NeedlePaddingSize < offset {
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2013-11-01 03:55:19 +08:00
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if _, err = v.nm.Put(n.Id, uint32(offset/NeedlePaddingSize), n.Size); err != nil {
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glog.V(4).Infof("failed to save in needle map %d: %s", n.Id, err.Error())
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}
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2011-12-16 22:51:26 +08:00
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}
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2014-09-21 03:38:59 +08:00
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if v.lastModifiedTime < n.LastModified {
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v.lastModifiedTime = n.LastModified
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}
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2013-01-20 19:40:04 +08:00
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return
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2011-12-16 22:51:26 +08:00
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}
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2013-07-06 07:05:35 +08:00
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2013-01-20 19:40:04 +08:00
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func (v *Volume) delete(n *Needle) (uint32, error) {
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2014-03-24 12:57:10 +08:00
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glog.V(4).Infof("delete needle %s", NewFileIdFromNeedle(v.Id, n).String())
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2013-04-15 10:30:26 +08:00
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if v.readOnly {
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2014-04-17 15:16:44 +08:00
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return 0, fmt.Errorf("%s is read-only", v.dataFile.Name())
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2013-04-15 10:30:26 +08:00
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}
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2012-01-19 08:49:41 +08:00
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v.accessLock.Lock()
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defer v.accessLock.Unlock()
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2012-08-24 14:06:15 +08:00
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nv, ok := v.nm.Get(n.Id)
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2013-01-03 07:39:55 +08:00
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//fmt.Println("key", n.Id, "volume offset", nv.Offset, "data_size", n.Size, "cached size", nv.Size)
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2012-01-19 08:49:41 +08:00
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if ok {
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2013-07-29 13:49:17 +08:00
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size := nv.Size
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2013-08-09 14:57:22 +08:00
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if err := v.nm.Delete(n.Id); err != nil {
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2013-07-29 13:49:17 +08:00
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return size, err
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2013-02-27 14:54:22 +08:00
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}
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2013-08-09 14:57:22 +08:00
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if _, err := v.dataFile.Seek(0, 2); err != nil {
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2013-07-29 13:49:17 +08:00
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return size, err
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2013-02-27 14:54:22 +08:00
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}
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2013-07-12 15:55:21 +08:00
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n.Data = make([]byte, 0)
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2013-07-29 13:53:25 +08:00
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_, err := n.Append(v.dataFile, v.Version())
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2013-07-29 13:49:17 +08:00
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return size, err
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2012-01-19 08:49:41 +08:00
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}
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2013-01-20 19:40:04 +08:00
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return 0, nil
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2012-01-19 08:49:41 +08:00
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}
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2012-11-24 09:03:27 +08:00
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2012-06-29 15:53:47 +08:00
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func (v *Volume) read(n *Needle) (int, error) {
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2012-08-24 14:06:15 +08:00
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nv, ok := v.nm.Get(n.Id)
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2014-09-21 03:38:59 +08:00
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if !ok || nv.Offset == 0 {
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return -1, errors.New("Not Found")
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}
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bytesRead, err := n.Read(v.dataFile, int64(nv.Offset)*NeedlePaddingSize, nv.Size, v.Version())
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if err != nil {
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return bytesRead, err
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}
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if !n.HasTtl() {
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return bytesRead, err
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}
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ttlMinutes := n.Ttl.Minutes()
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if ttlMinutes == 0 {
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return bytesRead, nil
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}
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if !n.HasLastModifiedDate() {
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return bytesRead, nil
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}
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if uint64(time.Now().Unix()) < n.LastModified+uint64(ttlMinutes*60) {
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return bytesRead, nil
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2011-12-16 22:51:26 +08:00
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}
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2012-09-27 11:30:05 +08:00
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return -1, errors.New("Not Found")
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2011-12-24 16:40:56 +08:00
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}
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2012-11-07 17:51:43 +08:00
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2013-06-20 09:10:38 +08:00
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func (v *Volume) freeze() error {
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if v.readOnly {
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return nil
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}
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nm, ok := v.nm.(*NeedleMap)
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if !ok {
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|
return nil
|
|
|
|
}
|
|
|
|
v.accessLock.Lock()
|
|
|
|
defer v.accessLock.Unlock()
|
2013-11-19 07:05:11 +08:00
|
|
|
bn, _ := baseFilename(v.dataFile.Name())
|
2013-06-20 09:10:38 +08:00
|
|
|
cdbFn := bn + ".cdb"
|
2013-08-09 14:57:22 +08:00
|
|
|
glog.V(0).Infof("converting %s to %s", nm.indexFile.Name(), cdbFn)
|
2013-06-20 09:10:38 +08:00
|
|
|
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
|
|
|
|
}
|
2012-11-07 17:51:43 +08:00
|
|
|
|
2013-11-12 18:21:22 +08:00
|
|
|
func ScanVolumeFile(dirname string, collection string, id VolumeId,
|
2013-01-21 11:44:23 +08:00
|
|
|
visitSuperBlock func(SuperBlock) error,
|
2014-06-01 08:10:51 +08:00
|
|
|
readNeedleBody bool,
|
2013-09-20 02:06:14 +08:00
|
|
|
visitNeedle func(n *Needle, offset int64) error) (err error) {
|
2013-01-21 11:44:23 +08:00
|
|
|
var v *Volume
|
2013-11-12 18:21:22 +08:00
|
|
|
if v, err = loadVolumeWithoutIndex(dirname, collection, id); err != nil {
|
2014-03-19 19:48:13 +08:00
|
|
|
return errors.New("Failed to load volume:" + err.Error())
|
2012-11-07 17:51:43 +08:00
|
|
|
}
|
2013-01-21 11:44:23 +08:00
|
|
|
if err = visitSuperBlock(v.SuperBlock); err != nil {
|
2014-03-19 19:48:13 +08:00
|
|
|
return errors.New("Failed to read super block:" + err.Error())
|
2012-11-07 17:51:43 +08:00
|
|
|
}
|
|
|
|
|
2013-01-21 11:44:23 +08:00
|
|
|
version := v.Version()
|
2012-11-07 17:51:43 +08:00
|
|
|
|
2013-09-20 02:06:14 +08:00
|
|
|
offset := int64(SuperBlockSize)
|
2014-03-19 14:48:01 +08:00
|
|
|
n, rest, e := ReadNeedleHeader(v.dataFile, version, offset)
|
2013-01-21 11:44:23 +08:00
|
|
|
if e != nil {
|
|
|
|
err = fmt.Errorf("cannot read needle header: %s", e)
|
|
|
|
return
|
2013-01-20 19:40:04 +08:00
|
|
|
}
|
2013-01-21 11:44:23 +08:00
|
|
|
for n != nil {
|
2014-06-01 08:10:51 +08:00
|
|
|
if readNeedleBody {
|
|
|
|
if err = n.ReadNeedleBody(v.dataFile, version, offset+int64(NeedleHeaderSize), rest); err != nil {
|
|
|
|
err = fmt.Errorf("cannot read needle body: %s", err)
|
|
|
|
return
|
|
|
|
}
|
2013-01-21 11:44:23 +08:00
|
|
|
}
|
|
|
|
if err = visitNeedle(n, offset); err != nil {
|
|
|
|
return
|
|
|
|
}
|
2014-03-19 19:48:13 +08:00
|
|
|
offset += int64(NeedleHeaderSize) + int64(rest)
|
2014-03-19 14:48:01 +08:00
|
|
|
if n, rest, err = ReadNeedleHeader(v.dataFile, version, offset); err != nil {
|
2013-01-21 11:44:23 +08:00
|
|
|
if err == io.EOF {
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
return fmt.Errorf("cannot read needle header: %s", err)
|
|
|
|
}
|
2012-11-07 17:51:43 +08:00
|
|
|
}
|
|
|
|
|
2013-01-21 11:44:23 +08:00
|
|
|
return
|
|
|
|
}
|
|
|
|
|
2012-12-21 14:32:21 +08:00
|
|
|
func (v *Volume) ContentSize() uint64 {
|
2013-04-18 15:23:14 +08:00
|
|
|
return v.nm.ContentSize()
|
2012-12-04 14:54:08 +08:00
|
|
|
}
|
2013-08-13 07:53:32 +08:00
|
|
|
|
|
|
|
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: %s", fileName, fileName, e.Error())
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
return true
|
|
|
|
}
|
2014-09-21 03:38:59 +08:00
|
|
|
|
|
|
|
// 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
|
|
|
|
}
|