74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
// Copyright 2018 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 control
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import (
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"errors"
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"gvisor.dev/gvisor/pkg/log"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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"gvisor.dev/gvisor/pkg/sentry/state"
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"gvisor.dev/gvisor/pkg/sentry/watchdog"
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"gvisor.dev/gvisor/pkg/urpc"
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)
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// ErrInvalidFiles is returned when the urpc call to Save does not include an
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// appropriate file payload (e.g. there is no output file!).
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var ErrInvalidFiles = errors.New("exactly one file must be provided")
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// State includes state-related functions.
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type State struct {
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Kernel *kernel.Kernel
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Watchdog *watchdog.Watchdog
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}
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// SaveOpts contains options for the Save RPC call.
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type SaveOpts struct {
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// Key is used for state integrity check.
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Key []byte `json:"key"`
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// Metadata is the set of metadata to prepend to the state file.
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Metadata map[string]string `json:"metadata"`
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// FilePayload contains the destination for the state.
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urpc.FilePayload
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}
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// Save saves the running system.
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func (s *State) Save(o *SaveOpts, _ *struct{}) error {
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// Create an output stream.
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if len(o.FilePayload.Files) != 1 {
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return ErrInvalidFiles
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}
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defer o.FilePayload.Files[0].Close()
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// Save to the first provided stream.
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saveOpts := state.SaveOpts{
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Destination: o.FilePayload.Files[0],
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Key: o.Key,
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Metadata: o.Metadata,
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Callback: func(err error) {
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if err == nil {
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log.Infof("Save succeeded: exiting...")
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} else {
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log.Warningf("Save failed: exiting...")
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s.Kernel.SetSaveError(err)
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}
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s.Kernel.Kill(kernel.ExitStatus{})
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},
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}
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return saveOpts.Save(s.Kernel, s.Watchdog)
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}
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