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wireguard-go
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device: reduce peer lock critical section in UAPI 

The deferred RUnlock calls weren't executing until all peers
had been processed. Add an anonymous function so that each
peer may be unlocked as soon as it is completed.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Josh Bleecher Snyder 2021-11-18 15:37:24 -08:00 committed by Jason A. Donenfeld
parent 4d87c9e824
commit 387f7c461a
1 changed files with 24 additions and 22 deletions
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46
device/uapi.go
View File

@ -99,33 +99,35 @@ func (device *Device) IpcGetOperation(w io.Writer) error {
sendf("fwmark=%d", device.net.fwmark)
}
// serialize each peer state
for _, peer := range device.peers.keyMap {
peer.RLock()
defer peer.RUnlock()
// Serialize peer state.
// Do the work in an anonymous function so that we can use defer.
func() {
peer.RLock()
defer peer.RUnlock()
keyf("public_key", (*[32]byte)(&peer.handshake.remoteStatic))
keyf("preshared_key", (*[32]byte)(&peer.handshake.presharedKey))
sendf("protocol_version=1")
if peer.endpoint != nil {
sendf("endpoint=%s", peer.endpoint.DstToString())
}
keyf("public_key", (*[32]byte)(&peer.handshake.remoteStatic))
keyf("preshared_key", (*[32]byte)(&peer.handshake.presharedKey))
sendf("protocol_version=1")
if peer.endpoint != nil {
sendf("endpoint=%s", peer.endpoint.DstToString())
}
nano := atomic.LoadInt64(&peer.stats.lastHandshakeNano)
secs := nano / time.Second.Nanoseconds()
nano %= time.Second.Nanoseconds()
nano := atomic.LoadInt64(&peer.stats.lastHandshakeNano)
secs := nano / time.Second.Nanoseconds()
nano %= time.Second.Nanoseconds()
sendf("last_handshake_time_sec=%d", secs)
sendf("last_handshake_time_nsec=%d", nano)
sendf("tx_bytes=%d", atomic.LoadUint64(&peer.stats.txBytes))
sendf("rx_bytes=%d", atomic.LoadUint64(&peer.stats.rxBytes))
sendf("persistent_keepalive_interval=%d", atomic.LoadUint32(&peer.persistentKeepaliveInterval))
sendf("last_handshake_time_sec=%d", secs)
sendf("last_handshake_time_nsec=%d", nano)
sendf("tx_bytes=%d", atomic.LoadUint64(&peer.stats.txBytes))
sendf("rx_bytes=%d", atomic.LoadUint64(&peer.stats.rxBytes))
sendf("persistent_keepalive_interval=%d", atomic.LoadUint32(&peer.persistentKeepaliveInterval))
device.allowedips.EntriesForPeer(peer, func(prefix netip.Prefix) bool {
sendf("allowed_ip=%s", prefix.String())
return true
})
device.allowedips.EntriesForPeer(peer, func(prefix netip.Prefix) bool {
sendf("allowed_ip=%s", prefix.String())
return true
})
}()
}
}()