mirror of
https://github.com/hanzoai/visor.git
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Tamir DubersteinandHanzo Dev
975aed380a
Annotate the existing port, binding and last-error lock contracts, including self-locking methods and the helpers called under e.mu. Keep the receive-state synchronization fix separate. Document synchronous callback ownership where the analyzer cannot propagate captured locks, and the stored socket-option interface's concrete lock requirements. Preserve the unlocked loopback send path. Co-authored-by: Hanzo Dev <[email protected]>
73 lines
1.8 KiB
Go
73 lines
1.8 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 udp
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import (
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"context"
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"time"
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"gvisor.dev/gvisor/pkg/log"
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"gvisor.dev/gvisor/pkg/tcpip"
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"gvisor.dev/gvisor/pkg/tcpip/stack"
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)
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// saveReceivedAt is invoked by stateify.
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func (p *udpPacket) saveReceivedAt() int64 {
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return p.receivedAt.UnixNano()
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}
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// loadReceivedAt is invoked by stateify.
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func (p *udpPacket) loadReceivedAt(_ context.Context, nsec int64) {
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p.receivedAt = time.Unix(0, nsec)
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}
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// afterLoad is invoked by stateify.
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func (e *endpoint) afterLoad(ctx context.Context) {
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e.stack.RegisterRestoredEndpoint(e)
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}
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// beforeSave is invoked by stateify.
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//
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// +checklocksexclude:e.rcvMu
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func (e *endpoint) beforeSave() {
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e.freeze()
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e.stack.RegisterResumableEndpoint(e)
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}
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// Restore implements stack.RestoredEndpoint.Restore.
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//
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// +checklocksexclude:e.rcvMu
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// +checklocksexclude:e.mu
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func (e *endpoint) Restore(s *stack.Stack) {
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e.mu.Lock()
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defer e.mu.Unlock()
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if err := e.net.Resume(s); err != nil {
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log.Warningf("Closing the UDP endpoint as it cannot be restored, err: %v", err)
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e.closeLocked()
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return
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}
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e.thaw()
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e.ops.InitHandler(e, e.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits)
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}
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// Resume implements stack.ResumableEndpoint.Resume.
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//
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// +checklocksexclude:e.rcvMu
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func (e *endpoint) Resume() {
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e.thaw()
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}
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