Merge branch 'master' into feature/helm-s3-allowEmptyFolder

weed/filer/reader_at.go

@@ -173,16 +173,15 @@ func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, ts int64, err err
 	// zero the remaining bytes if a gap exists at the end of the last chunk (or a fully sparse file)
 	if err == nil && remaining > 0 {
 		var delta int64
-		if c.fileSize > startOffset {
+		if c.fileSize >= startOffset {
 			delta = min(remaining, c.fileSize-startOffset)
 			startOffset -= offset
-		} else {
-			delta = remaining
-			startOffset = max(startOffset-offset, startOffset-remaining-offset)
 		}
+		if delta > 0 {
 			glog.V(4).Infof("zero2 [%d,%d) of file size %d bytes", startOffset, startOffset+delta, c.fileSize)
 			n += zero(p, startOffset, delta)
 		}
+	}
 
 	if err == nil && offset+int64(len(p)) >= c.fileSize {
 		err = io.EOF
@@ -220,6 +219,9 @@ func (c *ChunkReadAt) readChunkSliceAt(buffer []byte, chunkView *ChunkView, next
 }
 
 func zero(buffer []byte, start, length int64) int {
+	if length <= 0 {
+		return 0
+	}
 	end := min(start+length, int64(len(buffer)))
 	start = max(start, 0)
 

weed/filer/reader_at_test.go

@@ -31,7 +31,7 @@ func (m *mockChunkCache) ReadChunkAt(data []byte, fileId string, offset uint64)
 func (m *mockChunkCache) SetChunk(fileId string, data []byte) {
 }
 
-func (m *mockChunkCache) GetMaxFilePartSizeInCache() (uint64) {
+func (m *mockChunkCache) GetMaxFilePartSizeInCache() uint64 {
 	return 0
 }
 
@@ -81,7 +81,7 @@ func TestReaderAt(t *testing.T) {
 	}
 
 	testReadAt(t, readerAt, 0, 10, 10, io.EOF, nil, nil)
-	testReadAt(t, readerAt, 0, 12, 12, io.EOF, nil, nil)
+	testReadAt(t, readerAt, 0, 12, 10, io.EOF, nil, nil)
 	testReadAt(t, readerAt, 2, 8, 8, io.EOF, nil, nil)
 	testReadAt(t, readerAt, 3, 6, 6, nil, nil, nil)
 
@@ -131,8 +131,8 @@ func TestReaderAt0(t *testing.T) {
 	testReadAt(t, readerAt, 3, 16, 7, io.EOF, nil, nil)
 	testReadAt(t, readerAt, 3, 5, 5, nil, nil, nil)
 
-	testReadAt(t, readerAt, 11, 5, 5, io.EOF, nil, nil)
-	testReadAt(t, readerAt, 10, 5, 5, io.EOF, nil, nil)
+	testReadAt(t, readerAt, 11, 5, 0, io.EOF, nil, nil)
+	testReadAt(t, readerAt, 10, 5, 0, io.EOF, nil, nil)
 
 }
 

weed/mount/filehandle_read.go

@@ -47,6 +47,8 @@ func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, int64, e
 	if fileSize == 0 {
 		glog.V(1).Infof("empty fh %v", fileFullPath)
 		return 0, 0, io.EOF
+	} else if offset == fileSize {
+		return 0, 0, io.EOF
 	} else if offset >= fileSize {
 		glog.V(1).Infof("invalid read, fileSize %d, offset %d for %s", fileSize, offset, fileFullPath)
 		return 0, 0, io.EOF