Add csv discovery mode to experimental runtime

This change adds support for a "csv" discovery mode to the experimental runtime.
If this is set with experimental = true, a CSV-based discovery of devices and
mounts are used to define the modifications required to the OCI spec. The edits
are expressed as CDI ContainerEdits.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

internal/edits/mount.go

@@ -0,0 +1,53 @@
+/**
+# Copyright (c) 2022, NVIDIA CORPORATION.  All rights reserved.
+#
+# 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
+#
+#     http://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 edits
+
+import (
+	"github.com/NVIDIA/nvidia-container-toolkit/internal/discover"
+	"github.com/container-orchestrated-devices/container-device-interface/pkg/cdi"
+	"github.com/container-orchestrated-devices/container-device-interface/specs-go"
+)
+
+type mount discover.Mount
+
+// toEdits converts a discovered mount to CDI Container Edits.
+func (d mount) toEdits() *cdi.ContainerEdits {
+	e := cdi.ContainerEdits{
+		ContainerEdits: &specs.ContainerEdits{
+			Mounts: []*specs.Mount{d.toSpec()},
+		},
+	}
+	return &e
+}
+
+// toSpec converts a discovered Mount to a CDI Spec Mount. Note
+// that missing info is filled in when edits are applied by querying the Mount node.
+func (d mount) toSpec() *specs.Mount {
+	s := specs.Mount{
+		HostPath: d.Path,
+		// TODO: We need to update the container path
+		ContainerPath: d.Path,
+		Options: []string{
+			"ro",
+			"nosuid",
+			"nodev",
+			"bind",
+		},
+	}
+
+	return &s
+}