Internal change.

PiperOrigin-RevId: 373221316

2 files changed, 68 insertions, 0 deletions

diff --git a/pkg/sentry/devices/quotedev/BUILD b/pkg/sentry/devices/quotedev/BUILD
new file mode 100644
index 000000000..d09214e3e
--- /dev/null
+++ b/pkg/sentry/devices/quotedev/BUILD
@@ -0,0 +1,16 @@
+load("//tools:defs.bzl", "go_library")
+
+licenses(["notice"])
+
+go_library(
+    name = "quotedev",
+    srcs = ["quotedev.go"],
+    visibility = ["//pkg/sentry:internal"],
+    deps = [
+        "//pkg/abi/linux",
+        "//pkg/context",
+        "//pkg/sentry/fsimpl/devtmpfs",
+        "//pkg/sentry/vfs",
+        "//pkg/syserror",
+    ],
+)
diff --git a/pkg/sentry/devices/quotedev/quotedev.go b/pkg/sentry/devices/quotedev/quotedev.go
new file mode 100644
index 000000000..6114cb724
--- /dev/null
+++ b/pkg/sentry/devices/quotedev/quotedev.go
@@ -0,0 +1,52 @@
+// 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
+//
+//     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 quotedev implements a vfs.Device for /dev/gvisor_quote.
+package quotedev
+
+import (
+	"gvisor.dev/gvisor/pkg/abi/linux"
+	"gvisor.dev/gvisor/pkg/context"
+	"gvisor.dev/gvisor/pkg/sentry/fsimpl/devtmpfs"
+	"gvisor.dev/gvisor/pkg/sentry/vfs"
+	"gvisor.dev/gvisor/pkg/syserror"
+)
+
+const (
+	quoteDevMinor = 0
+)
+
+// quoteDevice implements vfs.Device for /dev/gvisor_quote
+//
+// +stateify savable
+type quoteDevice struct{}
+
+// Open implements vfs.Device.Open.
+// TODO(b/157161182): Add support for attestation ioctls.
+func (quoteDevice) Open(ctx context.Context, mnt *vfs.Mount, vfsd *vfs.Dentry, opts vfs.OpenOptions) (*vfs.FileDescription, error) {
+	return nil, syserror.EIO
+}
+
+// Register registers all devices implemented by this package in vfsObj.
+func Register(vfsObj *vfs.VirtualFilesystem) error {
+	return vfsObj.RegisterDevice(vfs.CharDevice, linux.UNNAMED_MAJOR, quoteDevMinor, quoteDevice{}, &vfs.RegisterDeviceOptions{
+		GroupName: "gvisor_quote",
+	})
+}
+
+// CreateDevtmpfsFiles creates device special files in dev representing all
+// devices implemented by this package.
+func CreateDevtmpfsFiles(ctx context.Context, dev *devtmpfs.Accessor) error {
+	return dev.CreateDeviceFile(ctx, "gvisor_quote", vfs.CharDevice, linux.UNNAMED_MAJOR, quoteDevMinor, 0666 /* mode */)
+}