From 5f2b3728fc1d71d32912c57d948ba4b15c886f2a Mon Sep 17 00:00:00 2001
From: Fabricio Voznika <fvoznika@google.com>
Date: Tue, 29 Jun 2021 10:53:10 -0700
Subject: Redirect all calls from `errdefs.ToGRPC` to `utils.ErrToGRPC`

This is to ensure that Go 1.13 error wrapping is correctly
translated to gRPC errors before returning from the shim.

Updates #6225

PiperOrigin-RevId: 382120441
---
 pkg/shim/utils/errors.go | 74 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 pkg/shim/utils/errors.go

(limited to 'pkg/shim/utils/errors.go')

diff --git a/pkg/shim/utils/errors.go b/pkg/shim/utils/errors.go
new file mode 100644
index 000000000..971d68c36
--- /dev/null
+++ b/pkg/shim/utils/errors.go
@@ -0,0 +1,74 @@
+// Copyright 2021 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/containerd/containerd/errdefs"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+// ErrToGRPC wraps containerd's ToGRPC error mapper which depends on
+// github.com/pkg/errors to work correctly. Once we upgrade to containerd v1.4,
+// this function can go away and we can use errdefs.ToGRPC directly instead.
+//
+// TODO(gvisor.dev/issue/6232): Remove after upgrading to containerd v1.4
+func ErrToGRPC(err error) error {
+	return errToGRPCMsg(err, err.Error())
+}
+
+// ErrToGRPCf maps the error to grpc error codes, assembling the formatting
+// string and combining it with the target error string.
+//
+// TODO(gvisor.dev/issue/6232): Remove after upgrading to containerd v1.4
+func ErrToGRPCf(err error, format string, args ...interface{}) error {
+	formatted := fmt.Sprintf(format, args...)
+	msg := fmt.Sprintf("%s: %s", formatted, err.Error())
+	return errToGRPCMsg(err, msg)
+}
+
+func errToGRPCMsg(err error, msg string) error {
+	if err == nil {
+		return nil
+	}
+	if _, ok := status.FromError(err); ok {
+		return err
+	}
+
+	switch {
+	case errors.Is(err, errdefs.ErrInvalidArgument):
+		return status.Errorf(codes.InvalidArgument, msg)
+	case errors.Is(err, errdefs.ErrNotFound):
+		return status.Errorf(codes.NotFound, msg)
+	case errors.Is(err, errdefs.ErrAlreadyExists):
+		return status.Errorf(codes.AlreadyExists, msg)
+	case errors.Is(err, errdefs.ErrFailedPrecondition):
+		return status.Errorf(codes.FailedPrecondition, msg)
+	case errors.Is(err, errdefs.ErrUnavailable):
+		return status.Errorf(codes.Unavailable, msg)
+	case errors.Is(err, errdefs.ErrNotImplemented):
+		return status.Errorf(codes.Unimplemented, msg)
+	case errors.Is(err, context.Canceled):
+		return status.Errorf(codes.Canceled, msg)
+	case errors.Is(err, context.DeadlineExceeded):
+		return status.Errorf(codes.DeadlineExceeded, msg)
+	}
+
+	return errdefs.ToGRPC(err)
+}
-- 
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