package mount import ( "context" "github.com/hanwen/go-fuse/v2/fuse" "github.com/seaweedfs/seaweedfs/weed/filer" "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/mount/meta_cache" "github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" ) // Lookup is called by the kernel when the VFS wants to know // about a file inside a directory. Many lookup calls can // occur in parallel, but only one call happens for each (dir, // name) pair. func (wfs *WFS) Lookup(cancel <-chan struct{}, header *fuse.InHeader, name string, out *fuse.EntryOut) (code fuse.Status) { if s := checkName(name); s != fuse.OK { return s } dirPath, code := wfs.inodeToPath.GetPath(header.NodeId) if code != fuse.OK { return } fullFilePath := dirPath.Child(name) visitErr := meta_cache.EnsureVisited(wfs.metaCache, wfs, dirPath) if visitErr != nil { glog.Errorf("dir Lookup %s: %v", dirPath, visitErr) return fuse.EIO } localEntry, cacheErr := wfs.metaCache.FindEntry(context.Background(), fullFilePath) if cacheErr == filer_pb.ErrNotFound { return fuse.ENOENT } if localEntry == nil { // glog.V(3).Infof("dir Lookup cache miss %s", fullFilePath) entry, err := filer_pb.GetEntry(wfs, fullFilePath) if err != nil { glog.V(1).Infof("dir GetEntry %s: %v", fullFilePath, err) return fuse.ENOENT } localEntry = filer.FromPbEntry(string(dirPath), entry) } else { glog.V(4).Infof("dir Lookup cache hit %s", fullFilePath) } if localEntry == nil { return fuse.ENOENT } inode := wfs.inodeToPath.Lookup(fullFilePath, localEntry.Crtime.Unix(), localEntry.IsDirectory(), len(localEntry.HardLinkId) > 0, localEntry.Inode, true) if fh, found := wfs.fhMap.FindFileHandle(inode); found { fh.entryLock.RLock() if entry := fh.GetEntry().GetEntry(); entry != nil { glog.V(4).Infof("lookup opened file %s size %d", dirPath.Child(localEntry.Name()), filer.FileSize(entry)) localEntry = filer.FromPbEntry(string(dirPath), entry) } fh.entryLock.RUnlock() } wfs.outputFilerEntry(out, inode, localEntry) return fuse.OK }