140 lines
4.5 KiB
Go
140 lines
4.5 KiB
Go
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package vfs
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import (
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/sentry/context"
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"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
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"gvisor.dev/gvisor/pkg/syserror"
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)
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// FDTestFilesystemType is a test-only FilesystemType that produces Filesystems
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// for which all FilesystemImpl methods taking a path return EPERM. It is used
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// to produce Mounts and Dentries for testing of FileDescriptionImpls that do
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// not depend on their originating Filesystem.
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type FDTestFilesystemType struct{}
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// FDTestFilesystem is a test-only FilesystemImpl produced by
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// FDTestFilesystemType.
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type FDTestFilesystem struct {
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vfsfs Filesystem
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}
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// NewFilesystem implements FilesystemType.NewFilesystem.
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func (fstype FDTestFilesystemType) NewFilesystem(ctx context.Context, creds *auth.Credentials, source string, opts NewFilesystemOptions) (*Filesystem, *Dentry, error) {
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var fs FDTestFilesystem
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fs.vfsfs.Init(&fs)
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return &fs.vfsfs, fs.NewDentry(), nil
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}
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// Release implements FilesystemImpl.Release.
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func (fs *FDTestFilesystem) Release() {
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}
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// Sync implements FilesystemImpl.Sync.
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func (fs *FDTestFilesystem) Sync(ctx context.Context) error {
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return nil
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}
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// GetDentryAt implements FilesystemImpl.GetDentryAt.
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func (fs *FDTestFilesystem) GetDentryAt(ctx context.Context, rp *ResolvingPath, opts GetDentryOptions) (*Dentry, error) {
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return nil, syserror.EPERM
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}
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// LinkAt implements FilesystemImpl.LinkAt.
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func (fs *FDTestFilesystem) LinkAt(ctx context.Context, rp *ResolvingPath, vd VirtualDentry) error {
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return syserror.EPERM
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}
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// MkdirAt implements FilesystemImpl.MkdirAt.
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func (fs *FDTestFilesystem) MkdirAt(ctx context.Context, rp *ResolvingPath, opts MkdirOptions) error {
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return syserror.EPERM
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}
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// MknodAt implements FilesystemImpl.MknodAt.
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func (fs *FDTestFilesystem) MknodAt(ctx context.Context, rp *ResolvingPath, opts MknodOptions) error {
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return syserror.EPERM
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}
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// OpenAt implements FilesystemImpl.OpenAt.
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func (fs *FDTestFilesystem) OpenAt(ctx context.Context, rp *ResolvingPath, opts OpenOptions) (*FileDescription, error) {
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return nil, syserror.EPERM
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}
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// ReadlinkAt implements FilesystemImpl.ReadlinkAt.
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func (fs *FDTestFilesystem) ReadlinkAt(ctx context.Context, rp *ResolvingPath) (string, error) {
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return "", syserror.EPERM
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}
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// RenameAt implements FilesystemImpl.RenameAt.
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func (fs *FDTestFilesystem) RenameAt(ctx context.Context, rp *ResolvingPath, vd VirtualDentry, opts RenameOptions) error {
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return syserror.EPERM
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}
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// RmdirAt implements FilesystemImpl.RmdirAt.
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func (fs *FDTestFilesystem) RmdirAt(ctx context.Context, rp *ResolvingPath) error {
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return syserror.EPERM
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}
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// SetStatAt implements FilesystemImpl.SetStatAt.
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func (fs *FDTestFilesystem) SetStatAt(ctx context.Context, rp *ResolvingPath, opts SetStatOptions) error {
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return syserror.EPERM
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}
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// StatAt implements FilesystemImpl.StatAt.
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func (fs *FDTestFilesystem) StatAt(ctx context.Context, rp *ResolvingPath, opts StatOptions) (linux.Statx, error) {
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return linux.Statx{}, syserror.EPERM
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}
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// StatFSAt implements FilesystemImpl.StatFSAt.
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func (fs *FDTestFilesystem) StatFSAt(ctx context.Context, rp *ResolvingPath) (linux.Statfs, error) {
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return linux.Statfs{}, syserror.EPERM
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}
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// SymlinkAt implements FilesystemImpl.SymlinkAt.
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func (fs *FDTestFilesystem) SymlinkAt(ctx context.Context, rp *ResolvingPath, target string) error {
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return syserror.EPERM
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}
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// UnlinkAt implements FilesystemImpl.UnlinkAt.
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func (fs *FDTestFilesystem) UnlinkAt(ctx context.Context, rp *ResolvingPath) error {
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return syserror.EPERM
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}
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type fdTestDentry struct {
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vfsd Dentry
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}
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// NewDentry returns a new Dentry.
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func (fs *FDTestFilesystem) NewDentry() *Dentry {
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var d fdTestDentry
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d.vfsd.Init(&d)
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return &d.vfsd
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}
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// IncRef implements DentryImpl.IncRef.
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func (d *fdTestDentry) IncRef(vfsfs *Filesystem) {
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}
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// TryIncRef implements DentryImpl.TryIncRef.
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func (d *fdTestDentry) TryIncRef(vfsfs *Filesystem) bool {
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return true
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}
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// DecRef implements DentryImpl.DecRef.
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func (d *fdTestDentry) DecRef(vfsfs *Filesystem) {
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}
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