1 files changed, 0 insertions, 159 deletions
diff --git a/pkg/sentry/fsimpl/ext/regular_file.go b/pkg/sentry/fsimpl/ext/regular_file.go
deleted file mode 100644
index aec33e00a..000000000
--- a/pkg/sentry/fsimpl/ext/regular_file.go
+++ /dev/null
@@ -1,159 +0,0 @@
-// Copyright 2019 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 ext
-
-import (
-	"io"
-	"sync"
-
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/sentry/context"
-	"gvisor.dev/gvisor/pkg/sentry/memmap"
-	"gvisor.dev/gvisor/pkg/sentry/safemem"
-	"gvisor.dev/gvisor/pkg/sentry/usermem"
-	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
-)
-
-// regularFile represents a regular file's inode. This too follows the
-// inheritance pattern prevelant in the vfs layer described in
-// pkg/sentry/vfs/README.md.
-type regularFile struct {
-	inode inode
-
-	// This is immutable. The first field of fileReader implementations must be
-	// regularFile to ensure temporality.
-	// io.ReaderAt is more strict than io.Reader in the sense that a partial read
-	// is always accompanied by an error. If a read spans past the end of file, a
-	// partial read (within file range) is done and io.EOF is returned.
-	impl io.ReaderAt
-}
-
-// newRegularFile is the regularFile constructor. It figures out what kind of
-// file this is and initializes the fileReader.
-func newRegularFile(inode inode) (*regularFile, error) {
-	regFile := regularFile{
-		inode: inode,
-	}
-
-	inodeFlags := inode.diskInode.Flags()
-
-	if inodeFlags.Extents {
-		file, err := newExtentFile(regFile)
-		if err != nil {
-			return nil, err
-		}
-
-		file.regFile.inode.impl = &file.regFile
-		return &file.regFile, nil
-	}
-
-	file, err := newBlockMapFile(regFile)
-	if err != nil {
-		return nil, err
-	}
-	file.regFile.inode.impl = &file.regFile
-	return &file.regFile, nil
-}
-
-func (in *inode) isRegular() bool {
-	_, ok := in.impl.(*regularFile)
-	return ok
-}
-
-// directoryFD represents a directory file description. It implements
-// vfs.FileDescriptionImpl.
-type regularFileFD struct {
-	fileDescription
-
-	// off is the file offset. off is accessed using atomic memory operations.
-	off int64
-
-	// offMu serializes operations that may mutate off.
-	offMu sync.Mutex
-}
-
-// Release implements vfs.FileDescriptionImpl.Release.
-func (fd *regularFileFD) Release() {}
-
-// PRead implements vfs.FileDescriptionImpl.PRead.
-func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offset int64, opts vfs.ReadOptions) (int64, error) {
-	safeReader := safemem.FromIOReaderAt{
-		ReaderAt: fd.inode().impl.(*regularFile).impl,
-		Offset:   offset,
-	}
-
-	// Copies data from disk directly into usermem without any intermediate
-	// allocations (if dst is converted into BlockSeq such that it does not need
-	// safe copying).
-	return dst.CopyOutFrom(ctx, safeReader)
-}
-
-// Read implements vfs.FileDescriptionImpl.Read.
-func (fd *regularFileFD) Read(ctx context.Context, dst usermem.IOSequence, opts vfs.ReadOptions) (int64, error) {
-	n, err := fd.PRead(ctx, dst, fd.off, opts)
-	fd.offMu.Lock()
-	fd.off += n
-	fd.offMu.Unlock()
-	return n, err
-}
-
-// PWrite implements vfs.FileDescriptionImpl.PWrite.
-func (fd *regularFileFD) PWrite(ctx context.Context, src usermem.IOSequence, offset int64, opts vfs.WriteOptions) (int64, error) {
-	// write(2) specifies that EBADF must be returned if the fd is not open for
-	// writing.
-	return 0, syserror.EBADF
-}
-
-// Write implements vfs.FileDescriptionImpl.Write.
-func (fd *regularFileFD) Write(ctx context.Context, src usermem.IOSequence, opts vfs.WriteOptions) (int64, error) {
-	n, err := fd.PWrite(ctx, src, fd.off, opts)
-	fd.offMu.Lock()
-	fd.off += n
-	fd.offMu.Unlock()
-	return n, err
-}
-
-// IterDirents implements vfs.FileDescriptionImpl.IterDirents.
-func (fd *regularFileFD) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback) error {
-	return syserror.ENOTDIR
-}
-
-// Seek implements vfs.FileDescriptionImpl.Seek.
-func (fd *regularFileFD) Seek(ctx context.Context, offset int64, whence int32) (int64, error) {
-	fd.offMu.Lock()
-	defer fd.offMu.Unlock()
-	switch whence {
-	case linux.SEEK_SET:
-		// Use offset as specified.
-	case linux.SEEK_CUR:
-		offset += fd.off
-	case linux.SEEK_END:
-		offset += int64(fd.inode().diskInode.Size())
-	default:
-		return 0, syserror.EINVAL
-	}
-	if offset < 0 {
-		return 0, syserror.EINVAL
-	}
-	fd.off = offset
-	return offset, nil
-}
-
-// ConfigureMMap implements vfs.FileDescriptionImpl.ConfigureMMap.
-func (fd *regularFileFD) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error {
-	// TODO(b/134676337): Implement mmap(2).
-	return syserror.ENODEV
-}