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Diffstat (limited to 'pkg/sentry/fsimpl/ext/symlink.go')
-rw-r--r--pkg/sentry/fsimpl/ext/symlink.go111
1 files changed, 0 insertions, 111 deletions
diff --git a/pkg/sentry/fsimpl/ext/symlink.go b/pkg/sentry/fsimpl/ext/symlink.go
deleted file mode 100644
index 1447a4dc1..000000000
--- a/pkg/sentry/fsimpl/ext/symlink.go
+++ /dev/null
@@ -1,111 +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 (
- "gvisor.dev/gvisor/pkg/context"
- "gvisor.dev/gvisor/pkg/sentry/memmap"
- "gvisor.dev/gvisor/pkg/sentry/vfs"
- "gvisor.dev/gvisor/pkg/syserror"
- "gvisor.dev/gvisor/pkg/usermem"
-)
-
-// symlink represents a symlink inode.
-type symlink struct {
- inode inode
- target string // immutable
-}
-
-// newSymlink is the symlink constructor. It reads out the symlink target from
-// the inode (however it might have been stored).
-func newSymlink(inode inode) (*symlink, error) {
- var file *symlink
- var link []byte
-
- // If the symlink target is lesser than 60 bytes, its stores in inode.Data().
- // Otherwise either extents or block maps will be used to store the link.
- size := inode.diskInode.Size()
- if size < 60 {
- link = inode.diskInode.Data()[:size]
- } else {
- // Create a regular file out of this inode and read out the target.
- regFile, err := newRegularFile(inode)
- if err != nil {
- return nil, err
- }
-
- link = make([]byte, size)
- if n, err := regFile.impl.ReadAt(link, 0); uint64(n) < size {
- return nil, err
- }
- }
-
- file = &symlink{inode: inode, target: string(link)}
- file.inode.impl = file
- return file, nil
-}
-
-func (in *inode) isSymlink() bool {
- _, ok := in.impl.(*symlink)
- return ok
-}
-
-// symlinkFD represents a symlink file description and implements implements
-// vfs.FileDescriptionImpl. which may only be used if open options contains
-// O_PATH. For this reason most of the functions return EBADF.
-type symlinkFD struct {
- fileDescription
-}
-
-// Compiles only if symlinkFD implements vfs.FileDescriptionImpl.
-var _ vfs.FileDescriptionImpl = (*symlinkFD)(nil)
-
-// Release implements vfs.FileDescriptionImpl.Release.
-func (fd *symlinkFD) Release() {}
-
-// PRead implements vfs.FileDescriptionImpl.PRead.
-func (fd *symlinkFD) PRead(ctx context.Context, dst usermem.IOSequence, offset int64, opts vfs.ReadOptions) (int64, error) {
- return 0, syserror.EBADF
-}
-
-// Read implements vfs.FileDescriptionImpl.Read.
-func (fd *symlinkFD) Read(ctx context.Context, dst usermem.IOSequence, opts vfs.ReadOptions) (int64, error) {
- return 0, syserror.EBADF
-}
-
-// PWrite implements vfs.FileDescriptionImpl.PWrite.
-func (fd *symlinkFD) PWrite(ctx context.Context, src usermem.IOSequence, offset int64, opts vfs.WriteOptions) (int64, error) {
- return 0, syserror.EBADF
-}
-
-// Write implements vfs.FileDescriptionImpl.Write.
-func (fd *symlinkFD) Write(ctx context.Context, src usermem.IOSequence, opts vfs.WriteOptions) (int64, error) {
- return 0, syserror.EBADF
-}
-
-// IterDirents implements vfs.FileDescriptionImpl.IterDirents.
-func (fd *symlinkFD) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback) error {
- return syserror.ENOTDIR
-}
-
-// Seek implements vfs.FileDescriptionImpl.Seek.
-func (fd *symlinkFD) Seek(ctx context.Context, offset int64, whence int32) (int64, error) {
- return 0, syserror.EBADF
-}
-
-// ConfigureMMap implements vfs.FileDescriptionImpl.ConfigureMMap.
-func (fd *symlinkFD) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error {
- return syserror.EBADF
-}