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package command
import ( "os" "path" "strconv"
"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" )
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", -1, "a volume id. The volume should already exist in the dir. The volume index file should not exist.") )
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 > 0 && n.Size != types.TombstoneFileSize { 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 {
if *fixVolumeId == -1 { return false }
baseFileName := strconv.Itoa(*fixVolumeId) if *fixVolumeCollection != "" { baseFileName = *fixVolumeCollection + "_" + baseFileName } indexFileName := path.Join(*fixVolumePath, baseFileName+".idx")
nm := needle_map.NewMemDb() defer nm.Close()
vid := needle.VolumeId(*fixVolumeId) scanner := &VolumeFileScanner4Fix{ nm: nm, }
if err := storage.ScanVolumeFile(*fixVolumePath, *fixVolumeCollection, 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) }
return true }
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