65 lines
1.9 KiB
Go
65 lines
1.9 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 ext
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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/vfs"
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"gvisor.dev/gvisor/pkg/syserror"
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)
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// fileDescription is embedded by ext implementations of
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// vfs.FileDescriptionImpl.
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type fileDescription struct {
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vfsfd vfs.FileDescription
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vfs.FileDescriptionDefaultImpl
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}
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func (fd *fileDescription) filesystem() *filesystem {
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return fd.vfsfd.Mount().Filesystem().Impl().(*filesystem)
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}
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func (fd *fileDescription) inode() *inode {
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return fd.vfsfd.Dentry().Impl().(*dentry).inode
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}
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// Stat implements vfs.FileDescriptionImpl.Stat.
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func (fd *fileDescription) Stat(ctx context.Context, opts vfs.StatOptions) (linux.Statx, error) {
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var stat linux.Statx
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fd.inode().statTo(&stat)
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return stat, nil
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}
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// SetStat implements vfs.FileDescriptionImpl.SetStat.
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func (fd *fileDescription) SetStat(ctx context.Context, opts vfs.SetStatOptions) error {
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if opts.Stat.Mask == 0 {
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return nil
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}
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return syserror.EPERM
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}
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// SetStat implements vfs.FileDescriptionImpl.StatFS.
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func (fd *fileDescription) StatFS(ctx context.Context) (linux.Statfs, error) {
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var stat linux.Statfs
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fd.filesystem().statTo(&stat)
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return stat, nil
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}
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// Sync implements vfs.FileDescriptionImpl.Sync.
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func (fd *fileDescription) Sync(ctx context.Context) error {
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return nil
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}
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