github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/fs/file_state.go (about)

     1  // Copyright 2018 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 fs
    16  
    17  // beforeSave is invoked by stateify.
    18  func (f *File) beforeSave() {
    19  	f.saving = true
    20  	if f.flags.Async && f.async != nil {
    21  		f.async.Unregister(f)
    22  	}
    23  }
    24  
    25  // afterLoad is invoked by stateify.
    26  func (f *File) afterLoad() {
    27  	f.mu.Init()
    28  	if f.flags.Async && f.async != nil {
    29  		f.async.Register(f)
    30  	}
    31  }