81 lines
2.1 KiB
Go
81 lines
2.1 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/context"
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"gvisor.dev/gvisor/pkg/sentry/vfs"
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)
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// dentry implements vfs.DentryImpl.
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type dentry struct {
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vfsd vfs.Dentry
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// Protected by filesystem.mu.
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parent *dentry
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name string
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// inode is the inode represented by this dentry. Multiple Dentries may
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// share a single non-directory Inode (with hard links). inode is
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// immutable.
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inode *inode
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}
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// Compiles only if dentry implements vfs.DentryImpl.
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var _ vfs.DentryImpl = (*dentry)(nil)
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// newDentry is the dentry constructor.
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func newDentry(in *inode) *dentry {
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d := &dentry{
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inode: in,
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}
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d.vfsd.Init(d)
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return d
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}
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// IncRef implements vfs.DentryImpl.IncRef.
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func (d *dentry) IncRef() {
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d.inode.incRef()
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}
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// TryIncRef implements vfs.DentryImpl.TryIncRef.
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func (d *dentry) TryIncRef() bool {
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return d.inode.tryIncRef()
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}
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// DecRef implements vfs.DentryImpl.DecRef.
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func (d *dentry) DecRef(ctx context.Context) {
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// FIXME(b/134676337): filesystem.mu may not be locked as required by
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// inode.decRef().
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d.inode.decRef()
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}
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// InotifyWithParent implements vfs.DentryImpl.InotifyWithParent.
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//
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// TODO(b/134676337): Implement inotify.
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func (d *dentry) InotifyWithParent(ctx context.Context, events, cookie uint32, et vfs.EventType) {}
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// Watches implements vfs.DentryImpl.Watches.
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//
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// TODO(b/134676337): Implement inotify.
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func (d *dentry) Watches() *vfs.Watches {
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return nil
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}
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// OnZeroWatches implements vfs.Dentry.OnZeroWatches.
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//
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// TODO(b/134676337): Implement inotify.
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func (d *dentry) OnZeroWatches(context.Context) {}
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