cache: notify vfs when using temp fs - fixes #2051

backend/cache/cache.go

@@ -470,6 +470,14 @@ func (f *Fs) notifyDirChange(remote string) {
 	f.notifyDirChangeUpstream(cd.Remote())
 }
 
+// notifyDirChangeUpstreamIfNeeded will check if the wrapped remote doesn't notify on dir changes
+// or if we use a temp fs
+func (f *Fs) notifyDirChangeUpstreamIfNeeded(remote string) {
+	if f.Fs.Features().DirChangeNotify == nil || f.tempWritePath != "" {
+		f.notifyDirChangeUpstream(remote)
+	}
+}
+
 // notifyDirChangeUpstream will loop through all the upstreams and notify
 // of the provided remote (should be only a dir)
 func (f *Fs) notifyDirChangeUpstream(remote string) {
@@ -752,9 +760,7 @@ func (f *Fs) Mkdir(dir string) error {
 		fs.Infof(parentCd, "mkdir: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(parentCd.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(parentCd.Remote())
 
 	return nil
 }
@@ -824,9 +830,7 @@ func (f *Fs) Rmdir(dir string) error {
 		fs.Infof(parentCd, "rmdir: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(parentCd.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(parentCd.Remote())
 
 	return nil
 }
@@ -924,9 +928,7 @@ func (f *Fs) DirMove(src fs.Fs, srcRemote, dstRemote string) error {
 		fs.Debugf(srcParent, "dirmove: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(srcParent.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(srcParent.Remote())
 
 	// expire parent dir at the destination path
 	dstParent := NewDirectory(f, cleanPath(path.Dir(dstRemote)))
@@ -937,9 +939,7 @@ func (f *Fs) DirMove(src fs.Fs, srcRemote, dstRemote string) error {
 		fs.Debugf(dstParent, "dirmove: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(dstParent.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(dstParent.Remote())
 	// TODO: precache dst dir and save the chunks
 
 	return nil
@@ -1062,10 +1062,8 @@ func (f *Fs) put(in io.Reader, src fs.ObjectInfo, options []fs.OpenOption, put p
 	} else {
 		fs.Infof(parentCd, "put: cache expired")
 	}
-	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(parentCd.Remote())
-	}
+	// advertise to DirChangeNotify
+	f.notifyDirChangeUpstreamIfNeeded(parentCd.Remote())
 
 	return cachedObj, nil
 }
@@ -1155,9 +1153,7 @@ func (f *Fs) Copy(src fs.Object, remote string) (fs.Object, error) {
 		fs.Infof(parentCd, "copy: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(parentCd.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(parentCd.Remote())
 	// expire src parent
 	srcParent := NewDirectory(f, cleanPath(path.Dir(src.Remote())))
 	err = f.cache.ExpireDir(srcParent)
@@ -1167,9 +1163,7 @@ func (f *Fs) Copy(src fs.Object, remote string) (fs.Object, error) {
 		fs.Infof(srcParent, "copy: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(srcParent.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(srcParent.Remote())
 
 	return co, nil
 }
@@ -1255,9 +1249,7 @@ func (f *Fs) Move(src fs.Object, remote string) (fs.Object, error) {
 		fs.Infof(parentCd, "move: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(parentCd.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(parentCd.Remote())
 	// persist new
 	cachedObj := ObjectFromOriginal(f, obj).persist()
 	fs.Debugf(cachedObj, "move: added to cache")
@@ -1270,9 +1262,7 @@ func (f *Fs) Move(src fs.Object, remote string) (fs.Object, error) {
 		fs.Infof(parentCd, "move: cache expired")
 	}
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if f.Fs.Features().DirChangeNotify == nil {
-		f.notifyDirChangeUpstream(parentCd.Remote())
-	}
+	f.notifyDirChangeUpstreamIfNeeded(parentCd.Remote())
 
 	return cachedObj, nil
 }

backend/cache/cache_internal_test.go

@@ -313,6 +313,24 @@ func TestInternalCachedWrittenContentMatches(t *testing.T) {
 	require.Equal(t, checkSample, testSample)
 }
 
+func TestInternalDoubleWrittenContentMatches(t *testing.T) {
+	id := fmt.Sprintf("tidwcm%v", time.Now().Unix())
+	rootFs, boltDb := runInstance.newCacheFs(t, remoteName, id, false, true, nil, nil)
+	defer runInstance.cleanupFs(t, rootFs, boltDb)
+
+	// write the object
+	runInstance.writeRemoteString(t, rootFs, "one", "one content")
+	err := runInstance.updateData(t, rootFs, "one", "one content", " updated")
+	require.NoError(t, err)
+	err = runInstance.updateData(t, rootFs, "one", "one content updated", " double")
+	require.NoError(t, err)
+
+	// check sample of data from in-file
+	data, err := runInstance.readDataFromRemote(t, rootFs, "one", int64(0), int64(len("one content updated double")), true)
+	require.NoError(t, err)
+	require.Equal(t, "one content updated double", string(data))
+}
+
 func TestInternalCachedUpdatedContentMatches(t *testing.T) {
 	id := fmt.Sprintf("ticucm%v", time.Now().Unix())
 	rootFs, boltDb := runInstance.newCacheFs(t, remoteName, id, false, true, nil, nil)

backend/cache/object.go

@@ -275,9 +275,7 @@ func (o *Object) Remove() error {
 	parentCd := NewDirectory(o.CacheFs, cleanPath(path.Dir(o.Remote())))
 	_ = o.CacheFs.cache.ExpireDir(parentCd)
 	// advertise to DirChangeNotify if wrapped doesn't do that
-	if o.CacheFs.Fs.Features().DirChangeNotify == nil {
-		o.CacheFs.notifyDirChangeUpstream(parentCd.Remote())
-	}
+	o.CacheFs.notifyDirChangeUpstreamIfNeeded(parentCd.Remote())
 
 	return nil
 }