add open release, refactor

weed/mount/filehandle.go

@@ -0,0 +1,16 @@
+package mount
+
+import "github.com/hanwen/go-fuse/v2/fuse"
+
+func (wfs *WFS) AcquireHandle(inode uint64, uid, gid uint32) (fileHandle *FileHandle, code fuse.Status) {
+	_, entry, status := wfs.maybeReadEntry(inode)
+	if status == fuse.OK {
+		fileHandle = wfs.fhmap.GetFileHandle(inode)
+		fileHandle.entry = entry
+	}
+	return
+}
+
+func (wfs *WFS) ReleaseHandle(handleId FileHandleId) {
+	wfs.fhmap.ReleaseByHandle(handleId)
+}