nodefs: use S_IFREG (regular file) as default for NodeAttr

nodefs/bridge.go

@@ -73,6 +73,10 @@ func (b *rawBridge) newInode(ops Operations, id NodeAttr, persistent bool) *Inod
 		return old
 	}
 	id.Mode = id.Mode &^ 07777
+	if id.Mode == 0 {
+		id.Mode = fuse.S_IFREG
+	}
+
 	switch id.Mode {
 	case fuse.S_IFDIR:
 		_ = ops.(DirOperations)

nodefs/cache_test.go

@@ -71,13 +71,13 @@ func (r *keepCacheRoot) OnAdd() {
 		keepCache: true,
 	}
 	f1.setContent(0)
-	i.AddChild("keep", i.NewInode(f1, NodeAttr{Mode: fuse.S_IFREG}), true)
+	i.AddChild("keep", i.NewInode(f1, NodeAttr{}), true)
 
 	f2 := &keepCacheFile{
 		keepCache: false,
 	}
 	f2.setContent(0)
-	i.AddChild("nokeep", i.NewInode(f2, NodeAttr{Mode: fuse.S_IFREG}), true)
+	i.AddChild("nokeep", i.NewInode(f2, NodeAttr{}), true)
 }
 
 func TestKeepCache(t *testing.T) {

nodefs/inode.go

@@ -23,7 +23,8 @@ type parentData struct {
 // NodeAttr holds immutable attributes of a object in the filesystem.
 type NodeAttr struct {
 	// Each Inode has a type, which does not change over the
-	// lifetime of the inode, for example fuse.S_IFDIR.
+	// lifetime of the inode, for example fuse.S_IFDIR. The default (0)
+	// is interpreted as S_IFREG (regular file).
 	Mode uint32
 
 	// The inode number must be unique among the currently live

nodefs/interrupt_test.go

@@ -30,7 +30,6 @@ func (r *interruptRoot) Lookup(ctx context.Context, name string, out *fuse.Entry
 		return nil, fuse.ENOENT
 	}
 	ch := InodeOf(r).NewInode(&r.child, NodeAttr{
-		Mode: fuse.S_IFREG,
 		Ino: 2,
 		Gen: 1})
 

nodefs/zip_test.go

@@ -189,7 +189,7 @@ func (zr *zipRoot) OnAdd() {
 
 			p = ch
 		}
-		ch := InodeOf(zr).NewPersistentInode(&zipFile{file: f}, NodeAttr{Mode: fuse.S_IFREG})
+		ch := InodeOf(zr).NewPersistentInode(&zipFile{file: f}, NodeAttr{})
 		p.AddChild(base, ch, true)
 	}
 }