fix some typos in source comments

Signed-off-by: bin liu <liubin0329@gmail.com>

docs/storage/driver/ipc/server.go

@@ -101,7 +101,7 @@ func handleRequest(driver storagedriver.StorageDriver, request Request) {
 		}
 	case "ReadStream":
 		path, _ := request.Parameters["Path"].(string)
-		// Depending on serialization method, Offset may be convereted to any int/uint type
+		// Depending on serialization method, Offset may be converted to any int/uint type
 		offset := reflect.ValueOf(request.Parameters["Offset"]).Convert(reflect.TypeOf(int64(0))).Int()
 		reader, err := driver.ReadStream(path, offset)
 		var response ReadStreamResponse
@@ -116,9 +116,9 @@ func handleRequest(driver storagedriver.StorageDriver, request Request) {
 		}
 	case "WriteStream":
 		path, _ := request.Parameters["Path"].(string)
-		// Depending on serialization method, Offset may be convereted to any int/uint type
+		// Depending on serialization method, Offset may be converted to any int/uint type
 		offset := reflect.ValueOf(request.Parameters["Offset"]).Convert(reflect.TypeOf(int64(0))).Int()
-		// Depending on serialization method, Size may be convereted to any int/uint type
+		// Depending on serialization method, Size may be converted to any int/uint type
 		size := reflect.ValueOf(request.Parameters["Size"]).Convert(reflect.TypeOf(int64(0))).Int()
 		reader, _ := request.Parameters["Reader"].(io.ReadCloser)
 		err := driver.WriteStream(path, offset, size, reader)

docs/storage/driver/testsuites/testsuites.go

@@ -435,7 +435,7 @@ func (suite *DriverSuite) testContinueStreamAppend(c *check.C, chunkSize int64)
 	c.Assert(err, check.IsNil)
 	c.Assert(received, check.DeepEquals, fullContents)
 
-	// Writing past size of file extends file (no offest error). We would like
+	// Writing past size of file extends file (no offset error). We would like
 	// to write chunk 4 one chunk length past chunk 3. It should be successful
 	// and the resulting file will be 5 chunks long, with a chunk of all
 	// zeros.

docs/storage/layer_test.go

@@ -336,7 +336,7 @@ func seekerSize(seeker io.ReadSeeker) (int64, error) {
 
 // createTestLayer creates a simple test layer in the provided driver under
 // tarsum dgst, returning the sha256 digest location. This is implemented
-// peicemeal and should probably be replaced by the uploader when it's ready.
+// piecemeal and should probably be replaced by the uploader when it's ready.
 func writeTestLayer(driver storagedriver.StorageDriver, pathMapper *pathMapper, name string, dgst digest.Digest, content io.Reader) (digest.Digest, error) {
 	h := sha256.New()
 	rd := io.TeeReader(content, h)

docs/storage/layerwriter.go

@@ -182,7 +182,7 @@ func (lw *layerWriter) resumeHashAt(offset int64) error {
 	}
 
 	if offset == int64(lw.resumableDigester.Len()) {
-		// State of digester is already at the requseted offset.
+		// State of digester is already at the requested offset.
 		return nil
 	}
 

docs/storage/paths.go

@@ -387,7 +387,7 @@ type layerLinkPathSpec struct {
 func (layerLinkPathSpec) pathSpec() {}
 
 // blobAlgorithmReplacer does some very simple path sanitization for user
-// input. Mostly, this is to provide some heirachry for tarsum digests. Paths
+// input. Mostly, this is to provide some hierarchy for tarsum digests. Paths
 // should be "safe" before getting this far due to strict digest requirements
 // but we can add further path conversion here, if needed.
 var blobAlgorithmReplacer = strings.NewReplacer(