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// Copyright 2020 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 fuse
import (
"testing"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/sentry/fsimpl/testutil"
"gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/vfs"
"gvisor.dev/gvisor/pkg/usermem"
"gvisor.dev/gvisor/tools/go_marshal/marshal"
)
func setup(t *testing.T) *testutil.System {
k, err := testutil.Boot()
if err != nil {
t.Fatalf("Error creating kernel: %v", err)
}
ctx := k.SupervisorContext()
creds := auth.CredentialsFromContext(ctx)
k.VFS().MustRegisterFilesystemType(Name, &FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
AllowUserList: true,
AllowUserMount: true,
})
mntns, err := k.VFS().NewMountNamespace(ctx, creds, "", "tmpfs", &vfs.GetFilesystemOptions{})
if err != nil {
t.Fatalf("NewMountNamespace(): %v", err)
}
return testutil.NewSystem(ctx, t, k.VFS(), mntns)
}
// newTestConnection creates a fuse connection that the sentry can communicate with
// and the FD for the server to communicate with.
func newTestConnection(system *testutil.System, k *kernel.Kernel, maxActiveRequests uint64) (*connection, *vfs.FileDescription, error) {
vfsObj := &vfs.VirtualFilesystem{}
fuseDev := &DeviceFD{}
if err := vfsObj.Init(system.Ctx); err != nil {
return nil, nil, err
}
vd := vfsObj.NewAnonVirtualDentry("genCountFD")
defer vd.DecRef(system.Ctx)
if err := fuseDev.vfsfd.Init(fuseDev, linux.O_RDWR|linux.O_CREAT, vd.Mount(), vd.Dentry(), &vfs.FileDescriptionOptions{}); err != nil {
return nil, nil, err
}
fsopts := filesystemOptions{
maxActiveRequests: maxActiveRequests,
}
fs, err := newFUSEFilesystem(system.Ctx, 0, &fsopts, &fuseDev.vfsfd)
if err != nil {
return nil, nil, err
}
return fs.conn, &fuseDev.vfsfd, nil
}
type testPayload struct {
marshal.StubMarshallable
data uint32
}
// SizeBytes implements marshal.Marshallable.SizeBytes.
func (t *testPayload) SizeBytes() int {
return 4
}
// MarshalBytes implements marshal.Marshallable.MarshalBytes.
func (t *testPayload) MarshalBytes(dst []byte) {
usermem.ByteOrder.PutUint32(dst[:4], t.data)
}
// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
func (t *testPayload) UnmarshalBytes(src []byte) {
*t = testPayload{data: usermem.ByteOrder.Uint32(src[:4])}
}
// Packed implements marshal.Marshallable.Packed.
func (t *testPayload) Packed() bool {
return true
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (t *testPayload) MarshalUnsafe(dst []byte) {
t.MarshalBytes(dst)
}
// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (t *testPayload) UnmarshalUnsafe(src []byte) {
t.UnmarshalBytes(src)
}
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