From f8d22292ee8a8eeecd9da9ca9355250ebbd505f7 Mon Sep 17 00:00:00 2001 From: gVisor bot Date: Tue, 11 May 2021 13:27:09 -0700 Subject: Internal change. PiperOrigin-RevId: 373221316 --- pkg/sentry/devices/quotedev/BUILD | 16 ++++++++++ pkg/sentry/devices/quotedev/quotedev.go | 52 +++++++++++++++++++++++++++++++++ 2 files changed, 68 insertions(+) create mode 100644 pkg/sentry/devices/quotedev/BUILD create mode 100644 pkg/sentry/devices/quotedev/quotedev.go (limited to 'pkg/sentry/devices') 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 */) +} -- cgit v1.2.3