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package command
import (
"fmt"
"io/ioutil"
"os"
"path"
"strconv"
"strings"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/storage"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
"github.com/chrislusf/seaweedfs/weed/storage/super_block"
"github.com/chrislusf/seaweedfs/weed/storage/types"
"github.com/chrislusf/seaweedfs/weed/util"
)
func init() {
cmdFix.Run = runFix // break init cycle
}
var cmdFix = &Command{
UsageLine: "fix -dir=/tmp -volumeId=234",
Short: "run weed tool fix on index file if corrupted",
Long: `Fix runs the SeaweedFS fix command to re-create the index .idx file.
`,
}
var (
fixVolumePath = cmdFix.Flag.String("dir", ".", "data directory to store files")
fixVolumeCollection = cmdFix.Flag.String("collection", "", "the volume collection name")
fixVolumeId = cmdFix.Flag.Int("volumeId", 0, "an optional volume id.")
)
type VolumeFileScanner4Fix struct {
version needle.Version
nm *needle_map.MemDb
}
func (scanner *VolumeFileScanner4Fix) VisitSuperBlock(superBlock super_block.SuperBlock) error {
scanner.version = superBlock.Version
return nil
}
func (scanner *VolumeFileScanner4Fix) ReadNeedleBody() bool {
return false
}
func (scanner *VolumeFileScanner4Fix) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) error {
glog.V(2).Infof("key %d offset %d size %d disk_size %d compressed %v", n.Id, offset, n.Size, n.DiskSize(scanner.version), n.IsCompressed())
if n.Size.IsValid() {
pe := scanner.nm.Set(n.Id, types.ToOffset(offset), n.Size)
glog.V(2).Infof("saved %d with error %v", n.Size, pe)
} else {
glog.V(2).Infof("skipping deleted file ...")
return scanner.nm.Delete(n.Id)
}
return nil
}
func runFix(cmd *Command, args []string) bool {
dir := util.ResolvePath(*fixVolumePath)
if *fixVolumeId != 0 {
doFixOneVolume(dir, *fixVolumeCollection, needle.VolumeId(*fixVolumeId))
return true
}
files, err := ioutil.ReadDir(dir)
if err != nil {
fmt.Println(err)
return false
}
for _, file := range files {
if !strings.HasSuffix(file.Name(), ".dat") {
continue
}
if *fixVolumeCollection != "" {
if !strings.HasPrefix(file.Name(), *fixVolumeCollection+"_") {
continue
}
}
baseFileName := file.Name()[:len(file.Name())-4]
collection, volumeIdStr := "", baseFileName
if sepIndex := strings.LastIndex(baseFileName, "_"); sepIndex > 0 {
collection = baseFileName[:sepIndex]
volumeIdStr = baseFileName[sepIndex+1:]
}
volumeId, parseErr := strconv.ParseInt(volumeIdStr, 10, 64)
if parseErr != nil {
fmt.Printf("Failed to parse volume id from %s: %v\n", baseFileName, parseErr)
return false
}
doFixOneVolume(dir, collection, needle.VolumeId(volumeId))
}
return true
}
func doFixOneVolume(dir, collection string, volumeId needle.VolumeId) {
baseFileName := strconv.Itoa(int(volumeId))
if collection != "" {
baseFileName = collection + "_" + baseFileName
}
indexFileName := path.Join(dir, baseFileName+".idx")
nm := needle_map.NewMemDb()
defer nm.Close()
vid := needle.VolumeId(*fixVolumeId)
scanner := &VolumeFileScanner4Fix{
nm: nm,
}
if err := storage.ScanVolumeFile(dir, collection, vid, storage.NeedleMapInMemory, scanner); err != nil {
glog.Fatalf("scan .dat File: %v", err)
os.Remove(indexFileName)
}
if err := nm.SaveToIdx(indexFileName); err != nil {
glog.Fatalf("save to .idx File: %v", err)
os.Remove(indexFileName)
}
}
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