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diff --git a/pkg/shim/options.go b/pkg/shim/options.go
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+++ b/pkg/shim/options.go
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+// Copyright 2018 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 shim
+
+const optionsType = "io.containerd.runsc.v1.options"
+
+// options is runtime options for io.containerd.runsc.v1.
+type options struct {
+	// ShimCgroup is the cgroup the shim should be in.
+	ShimCgroup string `toml:"shim_cgroup" json:"shimCgroup"`
+
+	// IoUID is the I/O's pipes uid.
+	IoUID uint32 `toml:"io_uid" json:"ioUid"`
+
+	// IoGID is the I/O's pipes gid.
+	IoGID uint32 `toml:"io_gid" json:"ioGid"`
+
+	// BinaryName is the binary name of the runsc binary.
+	BinaryName string `toml:"binary_name" json:"binaryName"`
+
+	// Root is the runsc root directory.
+	Root string `toml:"root" json:"root"`
+
+	// LogLevel sets the logging level. Some of the possible values are: debug,
+	// info, warning.
+	//
+	// This configuration only applies when the shim is running as a service.
+	LogLevel string `toml:"log_level" json:"logLevel"`
+
+	// LogPath is the path to log directory. %ID% tags inside the string are
+	// replaced with the container ID.
+	//
+	// This configuration only applies when the shim is running as a service.
+	LogPath string `toml:"log_path" json:"logPath"`
+
+	// RunscConfig is a key/value map of all runsc flags.
+	RunscConfig map[string]string `toml:"runsc_config" json:"runscConfig"`
+}