68 lines
2.4 KiB
Go
68 lines
2.4 KiB
Go
// Copyright 2018 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 pipe
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import (
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"io"
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"gvisor.dev/gvisor/pkg/sentry/arch"
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"gvisor.dev/gvisor/pkg/sentry/context"
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"gvisor.dev/gvisor/pkg/sentry/fs"
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"gvisor.dev/gvisor/pkg/sentry/fs/fsutil"
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"gvisor.dev/gvisor/pkg/sentry/usermem"
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)
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// ReaderWriter satisfies the FileOperations interface and services both
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// read and write requests. This should only be used directly for named pipes.
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// pipe(2) and pipe2(2) only support unidirectional pipes and should use
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// either pipe.Reader or pipe.Writer.
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//
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// +stateify savable
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type ReaderWriter struct {
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fsutil.FilePipeSeek `state:"nosave"`
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fsutil.FileNotDirReaddir `state:"nosave"`
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fsutil.FileNoFsync `state:"nosave"`
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fsutil.FileNoMMap `state:"nosave"`
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fsutil.FileNoSplice `state:"nosave"`
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fsutil.FileNoopFlush `state:"nosave"`
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fsutil.FileUseInodeUnstableAttr `state:"nosave"`
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*Pipe
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}
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// Read implements fs.FileOperations.Read.
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func (rw *ReaderWriter) Read(ctx context.Context, _ *fs.File, dst usermem.IOSequence, _ int64) (int64, error) {
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return rw.Pipe.Read(ctx, dst)
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}
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// WriteTo implements fs.FileOperations.WriteTo.
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func (rw *ReaderWriter) WriteTo(ctx context.Context, _ *fs.File, w io.Writer, count int64, dup bool) (int64, error) {
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return rw.Pipe.WriteTo(ctx, w, count, dup)
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}
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// Write implements fs.FileOperations.Write.
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func (rw *ReaderWriter) Write(ctx context.Context, _ *fs.File, src usermem.IOSequence, _ int64) (int64, error) {
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return rw.Pipe.Write(ctx, src)
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}
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// ReadFrom implements fs.FileOperations.WriteTo.
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func (rw *ReaderWriter) ReadFrom(ctx context.Context, _ *fs.File, r io.Reader, count int64) (int64, error) {
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return rw.Pipe.ReadFrom(ctx, r, count)
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}
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// Ioctl implements fs.FileOperations.Ioctl.
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func (rw *ReaderWriter) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) {
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return rw.Pipe.Ioctl(ctx, io, args)
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}
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