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Ayush RanjanandgVisor bot
533c7b5188
This allows for external information to be passed to restore code.
Similar to a9af2d309b ("Plumb restore context to afterLoad()").
Updates #1956.
PiperOrigin-RevId: 614125262
36 lines
1.2 KiB
Go
36 lines
1.2 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 tcp
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import (
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"context"
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)
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// saveOptions is invoked by stateify.
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func (s *segment) saveOptions() []byte {
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// We cannot save s.options directly as it may point to s.data's trimmed
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// tail, which is not allowed by state framework (in-struct pointer).
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b := make([]byte, 0, cap(s.options))
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return append(b, s.options...)
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}
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// loadOptions is invoked by stateify.
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func (s *segment) loadOptions(_ context.Context, options []byte) {
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// NOTE: We cannot point s.options back into s.data's trimmed tail. But
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// it is OK as they do not need to aliased. Plus, options is already
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// allocated so there is no cost here.
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s.options = options
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}
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