Return "invalid parameter" (4xx) errors for distribution

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

api/server/router/distribution/distribution_routes.go

@@ -14,6 +14,7 @@ import (
 	"github.com/docker/docker/api/server/httputils"
 	"github.com/docker/docker/api/types"
 	registrytypes "github.com/docker/docker/api/types/registry"
+	"github.com/docker/docker/errdefs"
 	"github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/pkg/errors"
 )
@@ -42,9 +43,10 @@ func (s *distributionRouter) getDistributionInfo(ctx context.Context, w http.Res
 
 	image := vars["name"]
 
+	// TODO why is reference.ParseAnyReference() / reference.ParseNormalizedNamed() not using the reference.ErrTagInvalidFormat (and so on) errors?
 	ref, err := reference.ParseAnyReference(image)
 	if err != nil {
-		return err
+		return errdefs.InvalidParameter(err)
 	}
 	namedRef, ok := ref.(reference.Named)
 	if !ok {
@@ -52,7 +54,7 @@ func (s *distributionRouter) getDistributionInfo(ctx context.Context, w http.Res
 			// full image ID
 			return errors.Errorf("no manifest found for full image ID")
 		}
-		return errors.Errorf("unknown image reference format: %s", image)
+		return errdefs.InvalidParameter(errors.Errorf("unknown image reference format: %s", image))
 	}
 
 	distrepo, _, err := s.backend.GetRepository(ctx, namedRef, config)
@@ -66,7 +68,7 @@ func (s *distributionRouter) getDistributionInfo(ctx context.Context, w http.Res
 
 		taggedRef, ok := namedRef.(reference.NamedTagged)
 		if !ok {
-			return errors.Errorf("image reference not tagged: %s", image)
+			return errdefs.InvalidParameter(errors.Errorf("image reference not tagged: %s", image))
 		}
 
 		descriptor, err := distrepo.Tags(ctx).Get(ctx, taggedRef.Tag())
@@ -92,6 +94,16 @@ func (s *distributionRouter) getDistributionInfo(ctx context.Context, w http.Res
 	}
 	mnfst, err := mnfstsrvc.Get(ctx, distributionInspect.Descriptor.Digest)
 	if err != nil {
+		switch err {
+		case reference.ErrReferenceInvalidFormat,
+			reference.ErrTagInvalidFormat,
+			reference.ErrDigestInvalidFormat,
+			reference.ErrNameContainsUppercase,
+			reference.ErrNameEmpty,
+			reference.ErrNameTooLong,
+			reference.ErrNameNotCanonical:
+			return errdefs.InvalidParameter(err)
+		}
 		return err
 	}
 

daemon/images/image_pull.go

@@ -92,7 +92,7 @@ func (i *ImageService) GetRepository(ctx context.Context, ref reference.Named, a
 	// get repository info
 	repoInfo, err := i.registryService.ResolveRepository(ref)
 	if err != nil {
-		return nil, false, err
+		return nil, false, errdefs.InvalidParameter(err)
 	}
 	// makes sure name is not empty or `scratch`
 	if err := distribution.ValidateRepoName(repoInfo.Name); err != nil {