package filesys import ( "context" "fmt" "math" "os" "path" "sync" "time" "google.golang.org/grpc" "github.com/chrislusf/seaweedfs/weed/util/grace" "github.com/seaweedfs/fuse" "github.com/seaweedfs/fuse/fs" "github.com/chrislusf/seaweedfs/weed/filesys/meta_cache" "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/chunk_cache" ) type Option struct { FilerGrpcAddress string GrpcDialOption grpc.DialOption FilerMountRootPath string Collection string Replication string TtlSec int32 ChunkSizeLimit int64 ConcurrentWriters int CacheDir string CacheSizeMB int64 DataCenter string EntryCacheTtl time.Duration Umask os.FileMode MountUid uint32 MountGid uint32 MountMode os.FileMode MountCtime time.Time MountMtime time.Time OutsideContainerClusterMode bool // whether the mount runs outside SeaweedFS containers Cipher bool // whether encrypt data on volume server UidGidMapper *meta_cache.UidGidMapper } var _ = fs.FS(&WFS{}) var _ = fs.FSStatfser(&WFS{}) type WFS struct { option *Option // contains all open handles, protected by handlesLock handlesLock sync.Mutex handles map[uint64]*FileHandle bufPool sync.Pool stats statsCache root fs.Node fsNodeCache *FsCache chunkCache *chunk_cache.TieredChunkCache metaCache *meta_cache.MetaCache signature int32 // throttle writers concurrentWriters *util.LimitedConcurrentExecutor } type statsCache struct { filer_pb.StatisticsResponse lastChecked int64 // unix time in seconds } func NewSeaweedFileSystem(option *Option) *WFS { wfs := &WFS{ option: option, handles: make(map[uint64]*FileHandle), bufPool: sync.Pool{ New: func() interface{} { return make([]byte, option.ChunkSizeLimit) }, }, signature: util.RandomInt32(), } cacheUniqueId := util.Md5String([]byte(option.FilerGrpcAddress + option.FilerMountRootPath + util.Version()))[0:4] cacheDir := path.Join(option.CacheDir, cacheUniqueId) if option.CacheSizeMB > 0 { os.MkdirAll(cacheDir, os.FileMode(0777)&^option.Umask) wfs.chunkCache = chunk_cache.NewTieredChunkCache(256, cacheDir, option.CacheSizeMB, 1024*1024) } wfs.metaCache = meta_cache.NewMetaCache(path.Join(cacheDir, "meta"), util.FullPath(option.FilerMountRootPath), option.UidGidMapper, func(filePath util.FullPath) { fsNode := wfs.fsNodeCache.GetFsNode(filePath) if fsNode != nil { if file, ok := fsNode.(*File); ok { file.clearEntry() } } }) startTime := time.Now() go meta_cache.SubscribeMetaEvents(wfs.metaCache, wfs.signature, wfs, wfs.option.FilerMountRootPath, startTime.UnixNano()) grace.OnInterrupt(func() { wfs.metaCache.Shutdown() }) entry, _ := filer_pb.GetEntry(wfs, util.FullPath(wfs.option.FilerMountRootPath)) wfs.root = &Dir{name: wfs.option.FilerMountRootPath, wfs: wfs, entry: entry} wfs.fsNodeCache = newFsCache(wfs.root) if wfs.option.ConcurrentWriters > 0 { wfs.concurrentWriters = util.NewLimitedConcurrentExecutor(wfs.option.ConcurrentWriters) } return wfs } func (wfs *WFS) Root() (fs.Node, error) { return wfs.root, nil } func (wfs *WFS) AcquireHandle(file *File, uid, gid uint32) (fileHandle *FileHandle) { fullpath := file.fullpath() glog.V(4).Infof("AcquireHandle %s uid=%d gid=%d", fullpath, uid, gid) wfs.handlesLock.Lock() defer wfs.handlesLock.Unlock() inodeId := file.fullpath().AsInode() if file.isOpen > 0 { existingHandle, found := wfs.handles[inodeId] if found && existingHandle != nil { file.isOpen++ return existingHandle } } fileHandle = newFileHandle(file, uid, gid) file.maybeLoadEntry(context.Background()) file.isOpen++ wfs.handles[inodeId] = fileHandle fileHandle.handle = inodeId return } func (wfs *WFS) ReleaseHandle(fullpath util.FullPath, handleId fuse.HandleID) { wfs.handlesLock.Lock() defer wfs.handlesLock.Unlock() glog.V(4).Infof("%s ReleaseHandle id %d current handles length %d", fullpath, handleId, len(wfs.handles)) delete(wfs.handles, fullpath.AsInode()) return } // Statfs is called to obtain file system metadata. Implements fuse.FSStatfser func (wfs *WFS) Statfs(ctx context.Context, req *fuse.StatfsRequest, resp *fuse.StatfsResponse) error { glog.V(4).Infof("reading fs stats: %+v", req) if wfs.stats.lastChecked < time.Now().Unix()-20 { err := wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error { request := &filer_pb.StatisticsRequest{ Collection: wfs.option.Collection, Replication: wfs.option.Replication, Ttl: fmt.Sprintf("%ds", wfs.option.TtlSec), } glog.V(4).Infof("reading filer stats: %+v", request) resp, err := client.Statistics(context.Background(), request) if err != nil { glog.V(0).Infof("reading filer stats %v: %v", request, err) return err } glog.V(4).Infof("read filer stats: %+v", resp) wfs.stats.TotalSize = resp.TotalSize wfs.stats.UsedSize = resp.UsedSize wfs.stats.FileCount = resp.FileCount wfs.stats.lastChecked = time.Now().Unix() return nil }) if err != nil { glog.V(0).Infof("filer Statistics: %v", err) return err } } totalDiskSize := wfs.stats.TotalSize usedDiskSize := wfs.stats.UsedSize actualFileCount := wfs.stats.FileCount // Compute the total number of available blocks resp.Blocks = totalDiskSize / blockSize // Compute the number of used blocks numBlocks := uint64(usedDiskSize / blockSize) // Report the number of free and available blocks for the block size resp.Bfree = resp.Blocks - numBlocks resp.Bavail = resp.Blocks - numBlocks resp.Bsize = uint32(blockSize) // Report the total number of possible files in the file system (and those free) resp.Files = math.MaxInt64 resp.Ffree = math.MaxInt64 - actualFileCount // Report the maximum length of a name and the minimum fragment size resp.Namelen = 1024 resp.Frsize = uint32(blockSize) return nil } func (wfs *WFS) mapPbIdFromFilerToLocal(entry *filer_pb.Entry) { if entry.Attributes == nil { return } entry.Attributes.Uid, entry.Attributes.Gid = wfs.option.UidGidMapper.FilerToLocal(entry.Attributes.Uid, entry.Attributes.Gid) } func (wfs *WFS) mapPbIdFromLocalToFiler(entry *filer_pb.Entry) { if entry.Attributes == nil { return } entry.Attributes.Uid, entry.Attributes.Gid = wfs.option.UidGidMapper.LocalToFiler(entry.Attributes.Uid, entry.Attributes.Gid) }