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

     1  // Copyright 2022 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 iouringfs
    16  
    17  import (
    18  	"context"
    19  
    20  	"gvisor.dev/gvisor/pkg/sentry/pgalloc"
    21  )
    22  
    23  // beforeSave is invoked by stateify.
    24  func (fd *FileDescription) beforeSave() {
    25  	if fd.running.Load() != 0 {
    26  		panic("Task goroutine in fd.ProcessSubmissions during Save! This shouldn't be possible due to Kernel.Pause")
    27  	}
    28  }
    29  
    30  // afterLoad is invoked by stateify.
    31  func (fd *FileDescription) afterLoad(ctx context.Context) {
    32  	fd.mf = pgalloc.MemoryFileFromContext(ctx)
    33  	// Remap shared buffers.
    34  	fd.remap = true
    35  	fd.runC = make(chan struct{}, 1)
    36  }