seaweedfs/weed/command/fix.go
2019-01-16 17:48:59 +08:00

90 lines
2.5 KiB
Go

package command
import (
"os"
"path"
"strconv"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/storage"
"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 storage.Version
nm *storage.NeedleMap
}
func (scanner *VolumeFileScanner4Fix) VisitSuperBlock(superBlock storage.SuperBlock) error {
scanner.version = superBlock.Version()
return nil
}
func (scanner *VolumeFileScanner4Fix) ReadNeedleBody() bool {
return false
}
func (scanner *VolumeFileScanner4Fix) VisitNeedle(n *storage.Needle, offset int64) error {
glog.V(2).Infof("key %d offset %d size %d disk_size %d gzip %v", n.Id, offset, n.Size, n.DiskSize(scanner.version), n.IsGzipped())
if n.Size > 0 {
pe := scanner.nm.Put(n.Id, types.Offset(offset/types.NeedlePaddingSize), 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, types.Offset(offset/types.NeedlePaddingSize))
}
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")
indexFile, err := os.OpenFile(indexFileName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
glog.Fatalf("Create Volume Index [ERROR] %s\n", err)
}
defer indexFile.Close()
nm := storage.NewBtreeNeedleMap(indexFile)
defer nm.Close()
vid := storage.VolumeId(*fixVolumeId)
scanner := &VolumeFileScanner4Fix{
nm: nm,
}
err = storage.ScanVolumeFile(*fixVolumePath, *fixVolumeCollection, vid, storage.NeedleMapInMemory, scanner)
if err != nil {
glog.Fatalf("Export Volume File [ERROR] %s\n", err)
os.Remove(indexFileName)
}
return true
}