Cleanups.

fuse/loopback_test.go

@@ -135,25 +135,6 @@ func TestTouch(t *testing.T) {
 	}
 }
 
-func TestReadLarge(t *testing.T) {
-	ts := NewTestCase(t)
-	defer ts.Cleanup()
-
-	// Add a bit more to test the splicing at the end.
-	content := make([]byte, 1024*1024+43)
-	for i := range content {
-		content[i] = byte(i)
-	}
-	err := ioutil.WriteFile(ts.origFile, []byte(content), 0644)
-	CheckSuccess(err)
-
-	back, err := ioutil.ReadFile(ts.mountFile)
-	CheckSuccess(err)
-	if bytes.Compare(content, back) != 0 {
-		t.Errorf("content comparison failed")
-	}
-}
-
 func TestReadThrough(t *testing.T) {
 	ts := NewTestCase(t)
 	defer ts.Cleanup()
@@ -545,63 +526,22 @@ func TestFSync(t *testing.T) {
 	f.Close()
 }
 
-func TestLargeRead(t *testing.T) {
-	tc := NewTestCase(t)
-	defer tc.Cleanup()
-
-	t.Log("Testing large read.")
-	name := filepath.Join(tc.orig, "large")
-	f, err := os.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0777)
-	CheckSuccess(err)
-
-	b := bytes.NewBuffer(nil)
-
-	for i := 0; i < 20*1024; i++ {
-		b.WriteString("bla")
-	}
-	b.WriteString("something extra to not be round")
-
-	slice := b.Bytes()
-	n, err := f.Write(slice)
-	CheckSuccess(err)
-
-	err = f.Close()
-	CheckSuccess(err)
+func TestReadLarge(t *testing.T) {
+	ts := NewTestCase(t)
+	defer ts.Cleanup()
 
-	// Read in one go.
-	g, err := os.Open(filepath.Join(tc.mnt, "large"))
-	CheckSuccess(err)
-	readSlice := make([]byte, len(slice))
-	m, err := g.Read(readSlice)
-	if m != n {
-		t.Errorf("read mismatch %v %v", m, n)
-	}
-	for i, v := range readSlice {
-		if slice[i] != v {
-			t.Errorf("char mismatch %v %v %v", i, slice[i], v)
-			break
-		}
+	// Add a bit more to test the splicing at the end.
+	content := make([]byte, 1024*1024+43)
+	for i := range content {
+		content[i] = byte(i)
 	}
-
+	err := ioutil.WriteFile(ts.origFile, []byte(content), 0644)
 	CheckSuccess(err)
-	g.Close()
 
-	// Read in chunks
-	g, err = os.Open(filepath.Join(tc.mnt, "large"))
-	CheckSuccess(err)
-	defer g.Close()
-	readSlice = make([]byte, 4096)
-	total := 0
-	for {
-		m, err := g.Read(readSlice)
-		if m == 0 && err == io.EOF {
-			break
-		}
+	back, err := ioutil.ReadFile(ts.mountFile)
 	CheckSuccess(err)
-		total += m
-	}
-	if total != len(slice) {
-		t.Errorf("slice error %d", total)
+	if bytes.Compare(content, back) != 0 {
+		t.Errorf("content comparison failed")
 	}
 }
 

fuse/mountstate.go

@@ -342,7 +342,7 @@ func (ms *MountState) write(req *request) Status {
 		return OK
 	}
 
-	header := req.serializeHeader()
+	header := req.serializeHeader(req.flatData.Size())
 	if ms.Debug {
 		log.Println(req.OutputDebug())
 	}
@@ -361,13 +361,13 @@ func (ms *MountState) write(req *request) Status {
 	}
 
 	if req.flatData.FdSize > 0 {
-		if err := ms.TrySplice(header, req); err == nil {
+		if err := ms.TrySplice(header, req, req.flatData.Fd, req.flatData.FdSize, req.flatData.FdOff); err == nil {
 			return OK
 		} else {
 			log.Println("Splice error", err)
 			buf := ms.AllocOut(req, uint32(req.flatData.FdSize))
 			req.flatData.Read(buf)
-			header = req.serializeHeader()
+			header = req.serializeHeader(req.flatData.Size())
 		}
 	}
 
@@ -375,14 +375,15 @@ func (ms *MountState) write(req *request) Status {
 	return ToStatus(err)
 }
 
-func (ms *MountState) TrySplice(header []byte, req *request) error {
+func (ms *MountState) TrySplice(header []byte, req *request,
+	fd uintptr, size int, off int64) error {
 	finalSplice, err := splice.Get()
 	if err != nil {
 		return err
 	}
 	defer splice.Done(finalSplice)
 
-	total := len(header) + req.flatData.FdSize
+	total := len(header) + size
 	if !finalSplice.Grow(total) {
 		return fmt.Errorf("splice.Grow failed.")
 	}
@@ -393,12 +394,12 @@ func (ms *MountState) TrySplice(header []byte, req *request) error {
 	}
 
 	var n int
-	if req.flatData.FdOff < 0 {
-		n, err = finalSplice.LoadFrom(req.flatData.Fd, req.flatData.FdSize)
+	if off < 0 {
+		n, err = finalSplice.LoadFrom(fd, size)
 	} else {
-		n, err = finalSplice.LoadFromAt(req.flatData.Fd, req.flatData.FdSize, req.flatData.FdOff)
+		n, err = finalSplice.LoadFromAt(fd, size, off)
 	}
-	if err == io.EOF || (err == nil && n < req.flatData.FdSize && n > 0) {
+	if err == io.EOF || (err == nil && n < size && n > 0) {
 		discard := make([]byte, len(header))
 		_, err = finalSplice.Read(discard)
 		if err != nil {
@@ -406,11 +407,8 @@ func (ms *MountState) TrySplice(header []byte, req *request) error {
 		}
 
 		// TODO - fix debug output.
-		req.flatData.FdSize = n
-		req.flatData.Fd = finalSplice.ReadFd()
-		req.flatData.FdOff = -1
-		header = req.serializeHeader()
-		return ms.TrySplice(header, req)
+		header = req.serializeHeader(n)
+		return ms.TrySplice(header, req, fd, n, -1)
 	}
 
 	if err != nil {
@@ -418,7 +416,7 @@ func (ms *MountState) TrySplice(header []byte, req *request) error {
 		return err
 	}
 
-	if n != req.flatData.FdSize {
+	if n != size {
 		return fmt.Errorf("splice: wrote %d, want %d", n, req.flatData.FdSize)
 	}
 

fuse/request.go

@@ -179,7 +179,7 @@ func (r *request) parse() {
 	r.outData = unsafe.Pointer(&r.outBuf[sizeOfOutHeader])
 }
 
-func (r *request) serializeHeader() (header []byte) {
+func (r *request) serializeHeader(dataSize int) (header []byte) {
 	dataLength := r.handler.OutputSize
 	if r.outData == nil || r.status > OK {
 		dataLength = 0
@@ -191,7 +191,7 @@ func (r *request) serializeHeader() (header []byte) {
 	o.Unique = r.inHeader.Unique
 	o.Status = int32(-r.status)
 	o.Length = uint32(
-		int(sizeOfOutHeader) + int(dataLength) + r.flatData.Size())
+		int(sizeOfOutHeader) + int(dataLength) + dataSize)
 
 	var asSlice []byte
 	toSlice(&asSlice, r.outData, dataLength)