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net/tstun, wgengine/magicsock: enable vectorized I/O on Linux (#6663)

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This commit updates the wireguard-go dependency and implements the
necessary changes to the tun.Device and conn.Bind implementations to
support passing vectors of packets in tailscaled. This significantly
improves throughput performance on Linux.

Updates #414

Signed-off-by: Jordan Whited <jordan@tailscale.com>
Signed-off-by: James Tucker <james@tailscale.com>
Co-authored-by: James Tucker <james@tailscale.com>
This commit is contained in:
Jordan Whited
2022-12-08 17:58:14 -08:00
committed by GitHub
parent 389238fe4a
commit 76389d8baf
14 changed files with 777 additions and 298 deletions
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23
wgengine/wgcfg/device_test.go
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@ -213,18 +213,18 @@ func newNilTun() tun.Device {
}
}
func (t *nilTun) File() *os.File { return nil }
func (t *nilTun) Flush() error { return nil }
func (t *nilTun) MTU() (int, error) { return 1420, nil }
func (t *nilTun) Name() (string, error) { return "niltun", nil }
func (t *nilTun) Events() chan tun.Event { return t.events }
func (t *nilTun) File() *os.File { return nil }
func (t *nilTun) Flush() error { return nil }
func (t *nilTun) MTU() (int, error) { return 1420, nil }
func (t *nilTun) Name() (string, error) { return "niltun", nil }
func (t *nilTun) Events() <-chan tun.Event { return t.events }
func (t *nilTun) Read(data []byte, offset int) (int, error) {
func (t *nilTun) Read(data [][]byte, sizes []int, offset int) (int, error) {
<-t.closed
return 0, io.EOF
}
func (t *nilTun) Write(data []byte, offset int) (int, error) {
func (t *nilTun) Write(data [][]byte, offset int) (int, error) {
<-t.closed
return 0, io.EOF
}
@ -235,18 +235,21 @@ func (t *nilTun) Close() error {
return nil
}
func (t *nilTun) BatchSize() int { return 1 }
// A noopBind is a conn.Bind that does no actual binding work.
type noopBind struct{}
func (noopBind) Open(port uint16) (fns []conn.ReceiveFunc, actualPort uint16, err error) {
return nil, 1, nil
}
func (noopBind) Close() error { return nil }
func (noopBind) SetMark(mark uint32) error { return nil }
func (noopBind) Send(b []byte, ep conn.Endpoint) error { return nil }
func (noopBind) Close() error { return nil }
func (noopBind) SetMark(mark uint32) error { return nil }
func (noopBind) Send(b [][]byte, ep conn.Endpoint) error { return nil }
func (noopBind) ParseEndpoint(s string) (conn.Endpoint, error) {
return dummyEndpoint(s), nil
}
func (noopBind) BatchSize() int { return 1 }
// A dummyEndpoint is a string holding the endpoint destination.
type dummyEndpoint string