3 files changed, 45 insertions, 2 deletions
diff --git a/pkg/api/handlers/compat/changes.go b/pkg/api/handlers/compat/changes.go
index c442abbf9..dfe656755 100644
--- a/pkg/api/handlers/compat/changes.go
+++ b/pkg/api/handlers/compat/changes.go
@@ -4,14 +4,39 @@ import (
 	"net/http"
 
 	"github.com/containers/podman/v3/libpod"
+	"github.com/containers/podman/v3/libpod/define"
 	"github.com/containers/podman/v3/pkg/api/handlers/utils"
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
 )
 
 func Changes(w http.ResponseWriter, r *http.Request) {
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
 
+	query := struct {
+		Parent   string `schema:"parent"`
+		DiffType string `schema:"diffType"`
+	}{}
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
+		return
+	}
+	var diffType define.DiffType
+	switch query.DiffType {
+	case "", "all":
+		diffType = define.DiffAll
+	case "container":
+		diffType = define.DiffContainer
+	case "image":
+		diffType = define.DiffImage
+	default:
+		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Errorf("invalid diffType value %q", query.DiffType))
+		return
+	}
+
 	id := utils.GetName(r)
-	changes, err := runtime.GetDiff("", id)
+	changes, err := runtime.GetDiff(query.Parent, id, diffType)
 	if err != nil {
 		utils.InternalServerError(w, err)
 		return
diff --git a/pkg/api/server/register_containers.go b/pkg/api/server/register_containers.go
index 88ebb4df5..50e059ecc 100644
--- a/pkg/api/server/register_containers.go
+++ b/pkg/api/server/register_containers.go
@@ -1505,6 +1505,15 @@ func (s *APIServer) registerContainersHandlers(r *mux.Router) error {
 	//    type: string
 	//    required: true
 	//    description: the name or id of the container
+	//  - in: query
+	//    name: parent
+	//    type: string
+	//    description: specify a second layer which is used to compare against it instead of the parent layer
+	//  - in: query
+	//    name: diffType
+	//    type: string
+	//    enum: [all, container, image]
+	//    description: select what you want to match, default is all
 	// responses:
 	//   200:
 	//     description: Array of Changes
diff --git a/pkg/api/server/register_images.go b/pkg/api/server/register_images.go
index 3410c53cd..2103c093c 100644
--- a/pkg/api/server/register_images.go
+++ b/pkg/api/server/register_images.go
@@ -1286,7 +1286,16 @@ func (s *APIServer) registerImagesHandlers(r *mux.Router) error {
 	//    name: name
 	//    type: string
 	//    required: true
-	//    description: the name or id of the container
+	//    description: the name or id of the image
+	//  - in: query
+	//    name: parent
+	//    type: string
+	//    description: specify a second layer which is used to compare against it instead of the parent layer
+	//  - in: query
+	//    name: diffType
+	//    type: string
+	//    enum: [all, container, image]
+	//    description: select what you want to match, default is all
 	// responses:
 	//   200:
 	//     description: Array of Changes