package filer import ( "context" "fmt" "os" "strings" "time" "google.golang.org/grpc" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/util" "github.com/chrislusf/seaweedfs/weed/util/log_buffer" "github.com/chrislusf/seaweedfs/weed/wdclient" ) const ( LogFlushInterval = time.Minute PaginationSize = 1024 * 256 FilerStoreId = "filer.store.id" ) var ( OS_UID = uint32(os.Getuid()) OS_GID = uint32(os.Getgid()) ) type Filer struct { Store VirtualFilerStore MasterClient *wdclient.MasterClient fileIdDeletionQueue *util.UnboundedQueue GrpcDialOption grpc.DialOption DirBucketsPath string FsyncBuckets []string buckets *FilerBuckets Cipher bool LocalMetaLogBuffer *log_buffer.LogBuffer metaLogCollection string metaLogReplication string MetaAggregator *MetaAggregator Signature int32 } func NewFiler(masters []string, grpcDialOption grpc.DialOption, filerHost string, filerGrpcPort uint32, collection string, replication string, notifyFn func()) *Filer { f := &Filer{ MasterClient: wdclient.NewMasterClient(grpcDialOption, "filer", filerHost, filerGrpcPort, masters), fileIdDeletionQueue: util.NewUnboundedQueue(), GrpcDialOption: grpcDialOption, } f.LocalMetaLogBuffer = log_buffer.NewLogBuffer(LogFlushInterval, f.logFlushFunc, notifyFn) f.metaLogCollection = collection f.metaLogReplication = replication go f.loopProcessingDeletion() return f } func (f *Filer) AggregateFromPeers(self string, filers []string) { // set peers found := false for _, peer := range filers { if peer == self { found = true } } if !found { filers = append(filers, self) } f.MetaAggregator = NewMetaAggregator(filers, f.GrpcDialOption) f.MetaAggregator.StartLoopSubscribe(f, self) } func (f *Filer) SetStore(store FilerStore) { f.Store = NewFilerStoreWrapper(store) f.setOrLoadFilerStoreSignature(store) } func (f *Filer) setOrLoadFilerStoreSignature(store FilerStore) { 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) } 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) } } func (f *Filer) GetStore() (store FilerStore) { return f.Store } func (fs *Filer) GetMaster() string { return fs.MasterClient.GetMaster() } func (fs *Filer) KeepConnectedToMaster() { 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) error { if string(entry.FullPath) == "/" { return nil } dirParts := strings.Split(string(entry.FullPath), "/") // fmt.Printf("directory parts: %+v\n", dirParts) var lastDirectoryEntry *Entry for i := 1; i < len(dirParts); i++ { dirPath := "/" + util.Join(dirParts[:i]...) // 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 { // create the directory now := time.Now() dirEntry = &Entry{ FullPath: util.FullPath(dirPath), Attr: Attr{ Mtime: now, Crtime: now, Mode: os.ModeDir | entry.Mode | 0110, Uid: entry.Uid, Gid: entry.Gid, Collection: entry.Collection, Replication: entry.Replication, 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 { f.maybeAddBucket(dirEntry) 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) } // remember the direct parent directory entry if i == len(dirParts)-1 { lastDirectoryEntry = dirEntry } } if lastDirectoryEntry == nil { glog.Errorf("CreateEntry %s: lastDirectoryEntry is nil", entry.FullPath) return fmt.Errorf("parent folder not found: %v", 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) } */ oldEntry, _ := f.FindEntry(ctx, entry.FullPath) glog.V(4).Infof("CreateEntry %s: old entry: %v exclusive:%v", entry.FullPath, oldEntry, o_excl) if oldEntry == nil { 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) } 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.maybeAddBucket(entry) 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) UpdateEntry(ctx context.Context, oldEntry, entry *Entry) (err error) { if oldEntry != nil { if oldEntry.IsDirectory() && !entry.IsDirectory() { glog.Errorf("existing %s is a directory", entry.FullPath) return fmt.Errorf("existing %s is a directory", entry.FullPath) } if !oldEntry.IsDirectory() && entry.IsDirectory() { glog.Errorf("existing %s is a file", entry.FullPath) return fmt.Errorf("existing %s is a file", entry.FullPath) } } return f.Store.UpdateEntry(ctx, entry) } func (f *Filer) FindEntry(ctx context.Context, p util.FullPath) (entry *Entry, err error) { now := time.Now() if string(p) == "/" { return &Entry{ FullPath: p, Attr: Attr{ Mtime: now, Crtime: now, Mode: os.ModeDir | 0755, Uid: OS_UID, Gid: OS_GID, }, }, 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.DeleteEntry(ctx, p.Child(entry.Name())) return nil, filer_pb.ErrNotFound } } return } func (f *Filer) ListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int, prefix string) ([]*Entry, error) { if strings.HasSuffix(string(p), "/") && len(p) > 1 { p = p[0 : len(p)-1] } var makeupEntries []*Entry entries, expiredCount, lastFileName, err := f.doListDirectoryEntries(ctx, p, startFileName, inclusive, limit, prefix) for expiredCount > 0 && err == nil { makeupEntries, expiredCount, lastFileName, err = f.doListDirectoryEntries(ctx, p, lastFileName, false, expiredCount, prefix) if err == nil { entries = append(entries, makeupEntries...) } } return entries, err } func (f *Filer) doListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int, prefix string) (entries []*Entry, expiredCount int, lastFileName string, err error) { listedEntries, listErr := f.Store.ListDirectoryPrefixedEntries(ctx, p, startFileName, inclusive, limit, prefix) if listErr != nil { return listedEntries, expiredCount, "", listErr } for _, entry := range listedEntries { lastFileName = entry.Name() if entry.TtlSec > 0 { if entry.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) { f.Store.DeleteEntry(ctx, p.Child(entry.Name())) expiredCount++ continue } } entries = append(entries, entry) } return } func (f *Filer) Shutdown() { f.LocalMetaLogBuffer.Shutdown() f.Store.Shutdown() } func (f *Filer) maybeDeleteHardLinks(hardLinkIds []HardLinkId) { for _, hardLinkId := range hardLinkIds { if err := f.Store.DeleteHardLink(context.Background(), hardLinkId); err != nil { glog.Errorf("delete hard link id %d : %v", hardLinkId, err) } } }