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// 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/errors/linuxerr"
"gvisor.dev/gvisor/pkg/sentry/fsimpl/devtmpfs"
"gvisor.dev/gvisor/pkg/sentry/vfs"
)
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, linuxerr.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 */)
}
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