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lib/connections: Try not to deadlock (fixes #2987)

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GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/2991
This commit is contained in:
Audrius Butkevicius
2016-04-18 20:25:31 +00:00
committed by Jakob Borg
parent 893cc025f9
commit ea54525a33
2 changed files with 15 additions and 22 deletions
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23
lib/connections/connections.go
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@@ -65,11 +65,8 @@ type Service struct {
writeRateLimit *ratelimit.Bucket
readRateLimit *ratelimit.Bucket
lastRelayCheck map[protocol.DeviceID]time.Time
mut sync.RWMutex
connType map[protocol.DeviceID]model.ConnectionType
relaysEnabled bool
mut sync.RWMutex
connType map[protocol.DeviceID]model.ConnectionType
}
func NewConnectionService(cfg *config.Wrapper, myID protocol.DeviceID, mdl Model, tlsCfg *tls.Config, discoverer discover.Finder, mappings []*nat.Mapping,
@@ -88,9 +85,7 @@ func NewConnectionService(cfg *config.Wrapper, myID protocol.DeviceID, mdl Model
tlsDefaultCommonName: tlsDefaultCommonName,
lans: lans,
connType: make(map[protocol.DeviceID]model.ConnectionType),
relaysEnabled: cfg.Options().RelaysEnabled,
lastRelayCheck: make(map[protocol.DeviceID]time.Time),
connType: make(map[protocol.DeviceID]model.ConnectionType),
}
cfg.Subscribe(service)
@@ -284,9 +279,12 @@ next:
}
func (s *Service) connect() {
lastRelayCheck := make(map[protocol.DeviceID]time.Time)
delay := time.Second
for {
l.Debugln("Reconnect loop")
relaysEnabled := s.cfg.Options().RelaysEnabled
nextDevice:
for deviceID, deviceCfg := range s.cfg.Devices() {
if deviceID == s.myID {
@@ -299,7 +297,6 @@ func (s *Service) connect() {
paused := s.model.IsPaused(deviceID)
connected := s.model.ConnectedTo(deviceID)
ct, ok := s.connType[deviceID]
relaysEnabled := s.relaysEnabled
s.mut.RUnlock()
if paused {
@@ -338,14 +335,14 @@ func (s *Service) connect() {
}
reconIntv := time.Duration(s.cfg.Options().RelayReconnectIntervalM) * time.Minute
if last, ok := s.lastRelayCheck[deviceID]; ok && time.Since(last) < reconIntv {
if last, ok := lastRelayCheck[deviceID]; ok && time.Since(last) < reconIntv {
l.Debugln("Skipping connecting via relay to", deviceID, "last checked at", last)
continue nextDevice
}
l.Debugln("Trying relay connections to", deviceID, relays)
s.lastRelayCheck[deviceID] = time.Now()
lastRelayCheck[deviceID] = time.Now()
for _, addr := range relays {
if conn := s.connectViaRelay(deviceID, addr); conn != nil {
@@ -478,10 +475,6 @@ func (s *Service) VerifyConfiguration(from, to config.Configuration) error {
}
func (s *Service) CommitConfiguration(from, to config.Configuration) bool {
s.mut.Lock()
s.relaysEnabled = to.Options.RelaysEnabled
s.mut.Unlock()
// We require a restart if a device as been removed.
newDevices := make(map[protocol.DeviceID]bool, len(to.Devices))