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wgengine/netstack: release lock early on addSubnetAddress

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Signed-off-by: Naman Sood <mail@nsood.in>
This commit is contained in:
Naman Sood 2021-03-29 14:22:34 -04:00
parent 4c22967a81
commit 47bd3c4cf5
1 changed files with 3 additions and 2 deletions
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5
wgengine/netstack/netstack.go
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@ -189,11 +189,12 @@ func (ns *Impl) updateDNS(nm *netmap.NetworkMap) {
func (ns *Impl) addSubnetAddress(pn tcpip.NetworkProtocolNumber, ip netaddr.IP) {
ns.mu.Lock()
ns.connsOpenBySubnetIP[ip]++
needAdd := ns.connsOpenBySubnetIP[ip] == 1
ns.mu.Unlock()
// Only register address into netstack for first concurrent connection.
if ns.connsOpenBySubnetIP[ip] == 1 {
if needAdd {
ns.ipstack.AddAddress(nicID, pn, tcpip.Address(ip.IPAddr().IP))
}
ns.mu.Unlock()
}
func (ns *Impl) removeSubnetAddress(ip netaddr.IP) {