gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/sentry/fsimpl/overlay/save_restore.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package overlay
    16  
    17  import (
    18  	"context"
    19  
    20  	"gvisor.dev/gvisor/pkg/refs"
    21  )
    22  
    23  func (d *dentry) afterLoad(context.Context) {
    24  	if d.refs.Load() != -1 {
    25  		refs.Register(d)
    26  	}
    27  }
    28  
    29  // saveParent is called by stateify.
    30  func (d *dentry) saveParent() *dentry {
    31  	return d.parent.Load()
    32  }
    33  
    34  // loadParent is called by stateify.
    35  func (d *dentry) loadParent(_ context.Context, parent *dentry) {
    36  	d.parent.Store(parent)
    37  }