package filer import ( "context" "fmt" "os" "sort" "strings" "time" "github.com/seaweedfs/seaweedfs/weed/cluster" "github.com/seaweedfs/seaweedfs/weed/pb" "github.com/seaweedfs/seaweedfs/weed/pb/master_pb" "google.golang.org/grpc" "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" "github.com/seaweedfs/seaweedfs/weed/util" "github.com/seaweedfs/seaweedfs/weed/util/log_buffer" "github.com/seaweedfs/seaweedfs/weed/wdclient" ) const ( LogFlushInterval = time.Minute PaginationSize = 1024 FilerStoreId = "filer.store.id" ) var ( OS_UID = uint32(os.Getuid()) OS_GID = uint32(os.Getgid()) ) type Filer struct { UniqueFilerId int32 UniqueFilerEpoch int32 Store VirtualFilerStore MasterClient *wdclient.MasterClient fileIdDeletionQueue *util.UnboundedQueue GrpcDialOption grpc.DialOption DirBucketsPath string Cipher bool LocalMetaLogBuffer *log_buffer.LogBuffer metaLogCollection string metaLogReplication string MetaAggregator *MetaAggregator Signature int32 FilerConf *FilerConf RemoteStorage *FilerRemoteStorage } func NewFiler(masters map[string]pb.ServerAddress, grpcDialOption grpc.DialOption, filerHost pb.ServerAddress, filerGroup string, collection string, replication string, dataCenter string, notifyFn func()) *Filer { f := &Filer{ MasterClient: wdclient.NewMasterClient(grpcDialOption, filerGroup, cluster.FilerType, filerHost, dataCenter, "", masters), fileIdDeletionQueue: util.NewUnboundedQueue(), GrpcDialOption: grpcDialOption, FilerConf: NewFilerConf(), RemoteStorage: NewFilerRemoteStorage(), UniqueFilerId: util.RandomInt32(), } if f.UniqueFilerId < 0 { f.UniqueFilerId = -f.UniqueFilerId } f.LocalMetaLogBuffer = log_buffer.NewLogBuffer("local", LogFlushInterval, f.logFlushFunc, notifyFn) f.metaLogCollection = collection f.metaLogReplication = replication go f.loopProcessingDeletion() return f } func (f *Filer) MaybeBootstrapFromPeers(self pb.ServerAddress, existingNodes []*master_pb.ClusterNodeUpdate, snapshotTime time.Time) (err error) { if len(existingNodes) == 0 { return } sort.Slice(existingNodes, func(i, j int) bool { return existingNodes[i].CreatedAtNs < existingNodes[j].CreatedAtNs }) earliestNode := existingNodes[0] if earliestNode.Address == string(self) { return } glog.V(0).Infof("bootstrap from %v clientId:%d", earliestNode.Address, f.UniqueFilerId) f.UniqueFilerEpoch++ err = pb.FollowMetadata(pb.ServerAddress(earliestNode.Address), f.GrpcDialOption, "bootstrap", f.UniqueFilerId, f.UniqueFilerEpoch, "/", nil, 0, snapshotTime.UnixNano(), f.Signature, func(resp *filer_pb.SubscribeMetadataResponse) error { return Replay(f.Store, resp) }, pb.FatalOnError) return } func (f *Filer) AggregateFromPeers(self pb.ServerAddress, existingNodes []*master_pb.ClusterNodeUpdate, startFrom time.Time) { f.MetaAggregator = NewMetaAggregator(f, self, f.GrpcDialOption) f.MasterClient.SetOnPeerUpdateFn(f.MetaAggregator.OnPeerUpdate) for _, peerUpdate := range existingNodes { f.MetaAggregator.OnPeerUpdate(peerUpdate, startFrom) } } func (f *Filer) ListExistingPeerUpdates() (existingNodes []*master_pb.ClusterNodeUpdate) { return cluster.ListExistingPeerUpdates(f.GetMaster(), f.GrpcDialOption, f.MasterClient.FilerGroup, cluster.FilerType) } func (f *Filer) SetStore(store FilerStore) (isFresh bool) { f.Store = NewFilerStoreWrapper(store) return f.setOrLoadFilerStoreSignature(store) } func (f *Filer) setOrLoadFilerStoreSignature(store FilerStore) (isFresh bool) { storeIdBytes, err := store.KvGet(context.Background(), []byte(FilerStoreId)) if err == ErrKvNotFound || err == nil && len(storeIdBytes) == 0 { f.Signature = util.RandomInt32() storeIdBytes = make([]byte, 4) util.Uint32toBytes(storeIdBytes, uint32(f.Signature)) if err = store.KvPut(context.Background(), []byte(FilerStoreId), storeIdBytes); err != nil { glog.Fatalf("set %s=%d : %v", FilerStoreId, f.Signature, err) } glog.V(0).Infof("create %s to %d", FilerStoreId, f.Signature) return true } else if err == nil && len(storeIdBytes) == 4 { f.Signature = int32(util.BytesToUint32(storeIdBytes)) glog.V(0).Infof("existing %s = %d", FilerStoreId, f.Signature) } else { glog.Fatalf("read %v=%v : %v", FilerStoreId, string(storeIdBytes), err) } return false } func (f *Filer) GetStore() (store FilerStore) { return f.Store } func (fs *Filer) GetMaster() pb.ServerAddress { return fs.MasterClient.GetMaster() } func (fs *Filer) KeepMasterClientConnected() { fs.MasterClient.KeepConnectedToMaster() } func (f *Filer) BeginTransaction(ctx context.Context) (context.Context, error) { return f.Store.BeginTransaction(ctx) } func (f *Filer) CommitTransaction(ctx context.Context) error { return f.Store.CommitTransaction(ctx) } func (f *Filer) RollbackTransaction(ctx context.Context) error { return f.Store.RollbackTransaction(ctx) } func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool, isFromOtherCluster bool, signatures []int32, skipCreateParentDir bool) error { if string(entry.FullPath) == "/" { return nil } oldEntry, _ := f.FindEntry(ctx, entry.FullPath) /* if !hasWritePermission(lastDirectoryEntry, entry) { glog.V(0).Infof("directory %s: %v, entry: uid=%d gid=%d", lastDirectoryEntry.FullPath, lastDirectoryEntry.Attr, entry.Uid, entry.Gid) return fmt.Errorf("no write permission in folder %v", lastDirectoryEntry.FullPath) } */ if oldEntry == nil { if !skipCreateParentDir { dirParts := strings.Split(string(entry.FullPath), "/") if err := f.ensureParentDirectoryEntry(ctx, entry, dirParts, len(dirParts)-1, isFromOtherCluster); err != nil { return err } } glog.V(4).Infof("InsertEntry %s: new entry: %v", entry.FullPath, entry.Name()) if err := f.Store.InsertEntry(ctx, entry); err != nil { glog.Errorf("insert entry %s: %v", entry.FullPath, err) return fmt.Errorf("insert entry %s: %v", entry.FullPath, err) } } else { if o_excl { glog.V(3).Infof("EEXIST: entry %s already exists", entry.FullPath) return fmt.Errorf("EEXIST: entry %s already exists", entry.FullPath) } glog.V(4).Infof("UpdateEntry %s: old entry: %v", entry.FullPath, oldEntry.Name()) if err := f.UpdateEntry(ctx, oldEntry, entry); err != nil { glog.Errorf("update entry %s: %v", entry.FullPath, err) return fmt.Errorf("update entry %s: %v", entry.FullPath, err) } } f.NotifyUpdateEvent(ctx, oldEntry, entry, true, isFromOtherCluster, signatures) f.deleteChunksIfNotNew(oldEntry, entry) glog.V(4).Infof("CreateEntry %s: created", entry.FullPath) return nil } func (f *Filer) ensureParentDirectoryEntry(ctx context.Context, entry *Entry, dirParts []string, level int, isFromOtherCluster bool) (err error) { if level == 0 { return nil } dirPath := "/" + util.Join(dirParts[:level]...) // fmt.Printf("%d directory: %+v\n", i, dirPath) // check the store directly glog.V(4).Infof("find uncached directory: %s", dirPath) dirEntry, _ := f.FindEntry(ctx, util.FullPath(dirPath)) // no such existing directory if dirEntry == nil { // ensure parent directory if err = f.ensureParentDirectoryEntry(ctx, entry, dirParts, level-1, isFromOtherCluster); err != nil { return err } // create the directory now := time.Now() dirEntry = &Entry{ FullPath: util.FullPath(dirPath), Attr: Attr{ Mtime: now, Crtime: now, Mode: os.ModeDir | entry.Mode | 0111, Uid: entry.Uid, Gid: entry.Gid, UserName: entry.UserName, GroupNames: entry.GroupNames, }, } glog.V(2).Infof("create directory: %s %v", dirPath, dirEntry.Mode) mkdirErr := f.Store.InsertEntry(ctx, dirEntry) if mkdirErr != nil { if _, err := f.FindEntry(ctx, util.FullPath(dirPath)); err == filer_pb.ErrNotFound { glog.V(3).Infof("mkdir %s: %v", dirPath, mkdirErr) return fmt.Errorf("mkdir %s: %v", dirPath, mkdirErr) } } else { if !strings.HasPrefix("/"+util.Join(dirParts[:]...), SystemLogDir) { f.NotifyUpdateEvent(ctx, nil, dirEntry, false, isFromOtherCluster, nil) } } } else if !dirEntry.IsDirectory() { glog.Errorf("CreateEntry %s: %s should be a directory", entry.FullPath, dirPath) return fmt.Errorf("%s is a file", dirPath) } return nil } func (f *Filer) UpdateEntry(ctx context.Context, oldEntry, entry *Entry) (err error) { if oldEntry != nil { entry.Attr.Crtime = oldEntry.Attr.Crtime if oldEntry.IsDirectory() && !entry.IsDirectory() { glog.Errorf("existing %s is a directory", oldEntry.FullPath) return fmt.Errorf("existing %s is a directory", oldEntry.FullPath) } if !oldEntry.IsDirectory() && entry.IsDirectory() { glog.Errorf("existing %s is a file", oldEntry.FullPath) return fmt.Errorf("existing %s is a file", oldEntry.FullPath) } } return f.Store.UpdateEntry(ctx, entry) } var ( Root = &Entry{ FullPath: "/", Attr: Attr{ Mtime: time.Now(), Crtime: time.Now(), Mode: os.ModeDir | 0755, Uid: OS_UID, Gid: OS_GID, }, } ) func (f *Filer) FindEntry(ctx context.Context, p util.FullPath) (entry *Entry, err error) { if string(p) == "/" { return Root, nil } entry, err = f.Store.FindEntry(ctx, p) if entry != nil && entry.TtlSec > 0 { if entry.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) { f.Store.DeleteOneEntry(ctx, entry) return nil, filer_pb.ErrNotFound } } return } func (f *Filer) doListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int64, prefix string, eachEntryFunc ListEachEntryFunc) (expiredCount int64, lastFileName string, err error) { lastFileName, err = f.Store.ListDirectoryPrefixedEntries(ctx, p, startFileName, inclusive, limit, prefix, func(entry *Entry) bool { select { case <-ctx.Done(): return false default: if entry.TtlSec > 0 { if entry.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) { f.Store.DeleteOneEntry(ctx, entry) expiredCount++ return true } } return eachEntryFunc(entry) } }) if err != nil { return expiredCount, lastFileName, err } return } func (f *Filer) Shutdown() { f.LocalMetaLogBuffer.Shutdown() f.Store.Shutdown() }