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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package host
import (
"fmt"
"golang.org/x/sys/unix"
"gvisor.dev/gvisor/pkg/fd"
)
// beforeSave is invoked by stateify.
func (c *ConnectedEndpoint) beforeSave() {
if c.srfd < 0 {
panic("only host file descriptors provided at sentry startup can be saved")
}
}
// afterLoad is invoked by stateify.
func (c *ConnectedEndpoint) afterLoad() {
f, err := unix.Dup(c.srfd)
if err != nil {
panic(fmt.Sprintf("failed to dup restored FD %d: %v", c.srfd, err))
}
c.file = fd.New(f)
if err := c.init(); err != nil {
panic(fmt.Sprintf("Could not restore host socket FD %d: %v", c.srfd, err))
}
c.Init()
}
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