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swarm/network/stream: fix data races in GetPeerSubscriptions

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This commit is contained in:
Janos Guljas 2019-02-08 12:34:35 +01:00
parent 73d5c97595
commit d233560768
1 changed files with 6 additions and 0 deletions
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6
swarm/network/stream/stream.go
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@ -938,16 +938,22 @@ It returns a map of node IDs with an array of string representations of Stream o
func (api *API) GetPeerSubscriptions() map[string][]string { func (api *API) GetPeerSubscriptions() map[string][]string {
//create the empty map //create the empty map
pstreams := make(map[string][]string) pstreams := make(map[string][]string)
//iterate all streamer peers //iterate all streamer peers
api.streamer.peersMu.RLock()
defer api.streamer.peersMu.RUnlock()
for id, p := range api.streamer.peers { for id, p := range api.streamer.peers {
var streams []string var streams []string
//every peer has a map of stream servers //every peer has a map of stream servers
//every stream server represents a subscription //every stream server represents a subscription
p.serverMu.RLock()
for s := range p.servers { for s := range p.servers {
//append the string representation of the stream //append the string representation of the stream
//to the list for this peer //to the list for this peer
streams = append(streams, s.String()) streams = append(streams, s.String())
} }
p.serverMu.RUnlock()
//set the array of stream servers to the map //set the array of stream servers to the map
pstreams[id.String()] = streams pstreams[id.String()] = streams
} }