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multi: thread thru RPC caller context from CloseChannel

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This commit is contained in:
Olaoluwa Osuntokun 2025-02-10 18:34:34 -08:00
parent 127d3bed66
commit bf3007a2ce
5 changed files with 59 additions and 49 deletions
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9
htlcswitch/switch.go
View File

@ -2,6 +2,7 @@ package htlcswitch
import (
"bytes"
"context"
"errors"
"fmt"
"math/rand"
@ -125,6 +126,9 @@ type ChanClose struct {
// Err is used by request creator to receive request execution error.
Err chan error
// Ctx is a context linked to the lifetime of the caller.
Ctx context.Context //nolint:containedctx
}
// Config defines the configuration for the service. ALL elements within the
@ -1413,7 +1417,7 @@ func (s *Switch) teardownCircuit(pkt *htlcPacket) error {
// targetFeePerKw parameter should be the ideal fee-per-kw that will be used as
// a starting point for close negotiation. The deliveryScript parameter is an
// optional parameter which sets a user specified script to close out to.
func (s *Switch) CloseLink(chanPoint *wire.OutPoint,
func (s *Switch) CloseLink(ctx context.Context, chanPoint *wire.OutPoint,
closeType contractcourt.ChannelCloseType,
targetFeePerKw, maxFee chainfee.SatPerKWeight,
deliveryScript lnwire.DeliveryAddress) (chan interface{}, chan error) {
@ -1427,9 +1431,10 @@ func (s *Switch) CloseLink(chanPoint *wire.OutPoint,
ChanPoint: chanPoint,
Updates: updateChan,
TargetFeePerKw: targetFeePerKw,
MaxFee: maxFee,
DeliveryScript: deliveryScript,
Err: errChan,
MaxFee: maxFee,
Ctx: ctx,
}
select {

88
peer/brontide.go
View File

@ -585,8 +585,11 @@ type Brontide struct {
globalMsgRouter bool
startReady chan struct{}
quit chan struct{}
wg sync.WaitGroup
// cg is a helper that encapsulates a wait group and quit channel and
// allows contexts that either block or cancel on those depending on
// the use case.
cg *fn.ContextGuard
// log is a peer-specific logging instance.
log btclog.Logger
@ -630,10 +633,10 @@ func NewBrontide(cfg Config) *Brontide {
chanCloseMsgs: make(chan *closeMsg),
resentChanSyncMsg: make(map[lnwire.ChannelID]struct{}),
startReady: make(chan struct{}),
quit: make(chan struct{}),
log: peerLog.WithPrefix(logPrefix),
msgRouter: msgRouter,
globalMsgRouter: globalMsgRouter,
cg: fn.NewContextGuard(),
}
if cfg.Conn != nil && cfg.Conn.RemoteAddr() != nil {
@ -757,9 +760,9 @@ func (p *Brontide) Start() error {
// message MUST be sent before any other message.
readErr := make(chan error, 1)
msgChan := make(chan lnwire.Message, 1)
p.wg.Add(1)
p.cg.WgAdd(1)
go func() {
defer p.wg.Done()
defer p.cg.WgDone()
msg, err := p.readNextMessage()
if err != nil {
@ -848,7 +851,7 @@ func (p *Brontide) Start() error {
return fmt.Errorf("could not start ping manager %w", err)
}
p.wg.Add(4)
p.cg.WgAdd(4)
go p.queueHandler()
go p.writeHandler()
go p.channelManager()
@ -868,7 +871,7 @@ func (p *Brontide) Start() error {
//
// TODO(wilmer): Remove this once we're able to query for node
// announcements through their timestamps.
p.wg.Add(2)
p.cg.WgAdd(2)
go p.maybeSendNodeAnn(activeChans)
go p.maybeSendChannelUpdates()
@ -917,7 +920,7 @@ func (p *Brontide) taprootShutdownAllowed() bool {
//
// NOTE: Part of the lnpeer.Peer interface.
func (p *Brontide) QuitSignal() <-chan struct{} {
return p.quit
return p.cg.Done()
}
// addrWithInternalKey takes a delivery script, then attempts to supplement it
@ -1279,7 +1282,7 @@ func (p *Brontide) addLink(chanPoint *wire.OutPoint,
select {
case p.linkFailures <- failure:
case <-p.quit:
case <-p.cg.Done():
case <-p.cfg.Quit:
}
}
@ -1356,7 +1359,7 @@ func (p *Brontide) addLink(chanPoint *wire.OutPoint,
// maybeSendNodeAnn sends our node announcement to the remote peer if at least
// one confirmed public channel exists with them.
func (p *Brontide) maybeSendNodeAnn(channels []*channeldb.OpenChannel) {
defer p.wg.Done()
defer p.cg.WgDone()
hasConfirmedPublicChan := false
for _, channel := range channels {
@ -1388,7 +1391,7 @@ func (p *Brontide) maybeSendNodeAnn(channels []*channeldb.OpenChannel) {
// maybeSendChannelUpdates sends our channel updates to the remote peer if we
// have any active channels with them.
func (p *Brontide) maybeSendChannelUpdates() {
defer p.wg.Done()
defer p.cg.WgDone()
// If we don't have any active channels, then we can exit early.
if p.activeChannels.Len() == 0 {
@ -1464,16 +1467,16 @@ func (p *Brontide) WaitForDisconnect(ready chan struct{}) {
// set of goroutines are already active.
select {
case <-p.startReady:
case <-p.quit:
case <-p.cg.Done():
return
}
select {
case <-ready:
case <-p.quit:
case <-p.cg.Done():
}
p.wg.Wait()
p.cg.WgWait()
}
// Disconnect terminates the connection with the remote peer. Additionally, a
@ -1495,7 +1498,7 @@ func (p *Brontide) Disconnect(reason error) {
select {
case <-p.startReady:
case <-p.quit:
case <-p.cg.Done():
return
}
}
@ -1511,7 +1514,7 @@ func (p *Brontide) Disconnect(reason error) {
// Ensure that the TCP connection is properly closed before continuing.
p.cfg.Conn.Close()
close(p.quit)
p.cg.Quit()
// If our msg router isn't global (local to this instance), then we'll
// stop it. Otherwise, we'll leave it running.
@ -1692,7 +1695,7 @@ func (ms *msgStream) msgConsumer() {
// Otherwise, we'll check the message queue for any new
// items.
select {
case <-ms.peer.quit:
case <-ms.peer.cg.Done():
ms.msgCond.L.Unlock()
return
case <-ms.quit:
@ -1719,7 +1722,7 @@ func (ms *msgStream) msgConsumer() {
// grow indefinitely.
select {
case ms.producerSema <- struct{}{}:
case <-ms.peer.quit:
case <-ms.peer.cg.Done():
return
case <-ms.quit:
return
@ -1737,7 +1740,7 @@ func (ms *msgStream) AddMsg(msg lnwire.Message) {
// we're signalled to quit, or a slot is freed up.
select {
case <-ms.producerSema:
case <-ms.peer.quit:
case <-ms.peer.cg.Done():
return
case <-ms.quit:
return
@ -1814,7 +1817,7 @@ func waitUntilLinkActive(p *Brontide,
// calling function should catch it.
return p.fetchLinkFromKeyAndCid(cid)
case <-p.quit:
case <-p.cg.Done():
return nil
}
}
@ -1848,7 +1851,7 @@ func newChanMsgStream(p *Brontide, cid lnwire.ChannelID) *msgStream {
// as the peer is exiting, we'll check quickly to see
// if we need to exit.
select {
case <-p.quit:
case <-p.cg.Done():
return
default:
}
@ -1888,7 +1891,7 @@ func newDiscMsgStream(p *Brontide) *msgStream {
//
// NOTE: This method MUST be run as a goroutine.
func (p *Brontide) readHandler() {
defer p.wg.Done()
defer p.cg.WgDone()
// We'll stop the timer after a new messages is received, and also
// reset it after we process the next message.
@ -2009,13 +2012,13 @@ out:
case *lnwire.Shutdown:
select {
case p.chanCloseMsgs <- &closeMsg{msg.ChannelID, msg}:
case <-p.quit:
case <-p.cg.Done():
break out
}
case *lnwire.ClosingSigned:
select {
case p.chanCloseMsgs <- &closeMsg{msg.ChannelID, msg}:
case <-p.quit:
case <-p.cg.Done():
break out
}
@ -2587,7 +2590,7 @@ out:
break out
}
case <-p.quit:
case <-p.cg.Done():
exitErr = lnpeer.ErrPeerExiting
break out
}
@ -2595,7 +2598,7 @@ out:
// Avoid an exit deadlock by ensuring WaitGroups are decremented before
// disconnect.
p.wg.Done()
p.cg.WgDone()
p.Disconnect(exitErr)
@ -2607,7 +2610,7 @@ out:
//
// NOTE: This method MUST be run as a goroutine.
func (p *Brontide) queueHandler() {
defer p.wg.Done()
defer p.cg.WgDone()
// priorityMsgs holds an in order list of messages deemed high-priority
// to be added to the sendQueue. This predominately includes messages
@ -2648,7 +2651,7 @@ func (p *Brontide) queueHandler() {
} else {
lazyMsgs.PushBack(msg)
}
case <-p.quit:
case <-p.cg.Done():
return
}
} else {
@ -2662,7 +2665,7 @@ func (p *Brontide) queueHandler() {
} else {
lazyMsgs.PushBack(msg)
}
case <-p.quit:
case <-p.cg.Done():
return
}
}
@ -2696,7 +2699,7 @@ func (p *Brontide) queue(priority bool, msg lnwire.Message,
select {
case p.outgoingQueue <- outgoingMsg{priority, msg, errChan}:
case <-p.quit:
case <-p.cg.Done():
p.log.Tracef("Peer shutting down, could not enqueue msg: %v.",
spew.Sdump(msg))
if errChan != nil {
@ -2764,7 +2767,7 @@ func (p *Brontide) genDeliveryScript() ([]byte, error) {
//
// NOTE: This method MUST be run as a goroutine.
func (p *Brontide) channelManager() {
defer p.wg.Done()
defer p.cg.WgDone()
// reenableTimeout will fire once after the configured channel status
// interval has elapsed. This will trigger us to sign new channel
@ -2840,7 +2843,7 @@ out:
p.channelEventClient.Cancel()
}
case <-p.quit:
case <-p.cg.Done():
// As, we've been signalled to exit, we'll reset all
// our active channel back to their default state.
p.activeChannels.ForEach(func(_ lnwire.ChannelID,
@ -3123,7 +3126,7 @@ func (p *Brontide) retryRequestEnable(activeChans map[wire.OutPoint]struct{}) {
p.log.Warnf("Re-enable channel %v failed, received "+
"inactive link event", chanPoint)
case <-p.quit:
case <-p.cg.Done():
p.log.Debugf("Peer shutdown during retry enabling")
return
}
@ -3294,7 +3297,6 @@ func (p *Brontide) createChanCloser(channel *lnwallet.LightningChannel,
return p.cfg.DisconnectPeer(p.IdentityKey())
},
ChainParams: &p.cfg.Wallet.Cfg.NetParams,
Quit: p.quit,
},
*deliveryScript,
fee,
@ -3859,7 +3861,7 @@ func (p *Brontide) sendMessage(sync, priority bool, msgs ...lnwire.Message) erro
select {
case err := <-errChan:
return err
case <-p.quit:
case <-p.cg.Done():
return lnpeer.ErrPeerExiting
case <-p.cfg.Quit:
return lnpeer.ErrPeerExiting
@ -3907,7 +3909,7 @@ func (p *Brontide) AddNewChannel(newChan *lnpeer.NewChannel,
case p.newActiveChannel <- newChanMsg:
case <-cancel:
return errors.New("canceled adding new channel")
case <-p.quit:
case <-p.cg.Done():
return lnpeer.ErrPeerExiting
}
@ -3916,7 +3918,7 @@ func (p *Brontide) AddNewChannel(newChan *lnpeer.NewChannel,
select {
case err := <-errChan:
return err
case <-p.quit:
case <-p.cg.Done():
return lnpeer.ErrPeerExiting
}
}
@ -3940,7 +3942,7 @@ func (p *Brontide) AddPendingChannel(cid lnwire.ChannelID,
case <-cancel:
return errors.New("canceled adding pending channel")
case <-p.quit:
case <-p.cg.Done():
return lnpeer.ErrPeerExiting
}
@ -3954,7 +3956,7 @@ func (p *Brontide) AddPendingChannel(cid lnwire.ChannelID,
case <-cancel:
return errors.New("canceled adding pending channel")
case <-p.quit:
case <-p.cg.Done():
return lnpeer.ErrPeerExiting
}
}
@ -3971,7 +3973,7 @@ func (p *Brontide) RemovePendingChannel(cid lnwire.ChannelID) error {
select {
case p.removePendingChannel <- newChanMsg:
case <-p.quit:
case <-p.cg.Done():
return lnpeer.ErrPeerExiting
}
@ -3982,7 +3984,7 @@ func (p *Brontide) RemovePendingChannel(cid lnwire.ChannelID) error {
case err := <-errChan:
return err
case <-p.quit:
case <-p.cg.Done():
return lnpeer.ErrPeerExiting
}
}
@ -4134,7 +4136,7 @@ func (p *Brontide) HandleLocalCloseChanReqs(req *htlcswitch.ChanClose) {
case p.localCloseChanReqs <- req:
p.log.Info("Local close channel request is going to be " +
"delivered to the peer")
case <-p.quit:
case <-p.cg.Done():
p.log.Info("Unable to deliver local close channel request " +
"to peer")
}
@ -4464,7 +4466,7 @@ func (p *Brontide) sendLinkUpdateMsg(cid lnwire.ChannelID, msg lnwire.Message) {
// Stop the stream when quit.
go func() {
<-p.quit
<-p.cg.Done()
chanStream.Stop()
}()
}

2
peer/test_utils.go
View File

@ -337,7 +337,7 @@ func createTestPeerWithChannel(t *testing.T, updateChan func(a,
chanID := lnwire.NewChanIDFromOutPoint(channelAlice.ChannelPoint())
alicePeer.activeChannels.Store(chanID, channelAlice)
alicePeer.wg.Add(1)
alicePeer.cg.WgAdd(1)
go alicePeer.channelManager()
return &peerTestCtx{

5
rpcserver.go
View File

@ -2887,8 +2887,9 @@ func (r *rpcServer) CloseChannel(in *lnrpc.CloseChannelRequest,
}
updateChan, errChan = r.server.htlcSwitch.CloseLink(
chanPoint, contractcourt.CloseRegular, feeRate,
maxFee, deliveryScript,
updateStream.Context(), chanPoint,
contractcourt.CloseRegular, feeRate, maxFee,
deliveryScript,
)
}

4
server.go
View File

@ -1292,7 +1292,9 @@ func newServer(cfg *Config, listenAddrs []net.Addr,
// Instruct the switch to close the channel. Provide no close out
// delivery script or target fee per kw because user input is not
// available when the remote peer closes the channel.
s.htlcSwitch.CloseLink(chanPoint, closureType, 0, 0, nil)
s.htlcSwitch.CloseLink(
context.Background(), chanPoint, closureType, 0, 0, nil,
)
}
// We will use the following channel to reliably hand off contract