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all: remove some Debug fields, NetworkMap.Debug, Reconfig Debug arg

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Updates #8923

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2023-08-17 17:29:15 -07:00 committed by Brad Fitzpatrick
parent 86ad1ea60e
commit af2e4909b6
12 changed files with 27 additions and 184 deletions
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21
control/controlclient/map.go
View File

@ -14,7 +14,6 @@
"tailscale.com/types/key"
"tailscale.com/types/logger"
"tailscale.com/types/netmap"
"tailscale.com/types/opt"
"tailscale.com/types/views"
"tailscale.com/wgengine/filter"
)
@ -145,16 +144,6 @@ func (ms *mapSession) netmapForResponse(resp *tailcfg.MapResponse) *netmap.Netwo
ms.lastTKAInfo = resp.TKAInfo
}
debug := resp.Debug
if debug != nil {
copyDebugOptBools(&ms.stickyDebug, debug)
} else if ms.stickyDebug != (tailcfg.Debug{}) {
debug = new(tailcfg.Debug)
}
if debug != nil {
copyDebugOptBools(debug, &ms.stickyDebug)
}
nm := &netmap.NetworkMap{
NodeKey: ms.privateNodeKey.Public(),
PrivateKey: ms.privateNodeKey,
@ -169,7 +158,6 @@ func (ms *mapSession) netmapForResponse(resp *tailcfg.MapResponse) *netmap.Netwo
SSHPolicy: ms.lastSSHPolicy,
CollectServices: ms.collectServices,
DERPMap: ms.lastDERPMap,
Debug: debug,
ControlHealth: ms.lastHealth,
TKAEnabled: ms.lastTKAInfo != nil && !ms.lastTKAInfo.Disabled,
}
@ -401,12 +389,3 @@ func filterSelfAddresses(in []netip.Prefix) (ret []netip.Prefix) {
return ret
}
}
func copyDebugOptBools(dst, src *tailcfg.Debug) {
copy := func(v *opt.Bool, s opt.Bool) {
if s != "" {
*v = s
}
}
copy(&dst.OneCGNATRoute, src.OneCGNATRoute)
}

80
control/controlclient/map_test.go
View File

@ -17,7 +17,6 @@
"tailscale.com/tstime"
"tailscale.com/types/key"
"tailscale.com/types/netmap"
"tailscale.com/types/opt"
"tailscale.com/types/ptr"
"tailscale.com/util/must"
)
@ -470,85 +469,6 @@ func TestNetmapForResponse(t *testing.T) {
})
}
// TestDeltaDebug tests that tailcfg.Debug values can be omitted in MapResponses
// entirely or have their opt.Bool values unspecified between MapResponses in a
// session and that should mean no change. (as of capver 37). But one Debug
// field existed prior to capver 37 that wasn't opt.Bool; we test that we both
// still accept the non-opt.Bool form from control for RandomizeClientPort and
// also accept the new form, keeping the old form in sync.
func TestDeltaDebug(t *testing.T) {
type step struct {
got *tailcfg.Debug
want *tailcfg.Debug
}
tests := []struct {
name string
steps []step
}{
{
name: "nothing-to-nothing",
steps: []step{
{nil, nil},
{nil, nil},
},
},
{
name: "opt-bool-sticky-changing-over-time",
steps: []step{
{nil, nil},
{nil, nil},
{
&tailcfg.Debug{OneCGNATRoute: "true"},
&tailcfg.Debug{OneCGNATRoute: "true"},
},
{
nil,
&tailcfg.Debug{OneCGNATRoute: "true"},
},
{
&tailcfg.Debug{OneCGNATRoute: "false"},
&tailcfg.Debug{OneCGNATRoute: "false"},
},
{
nil,
&tailcfg.Debug{OneCGNATRoute: "false"},
},
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
ms := newTestMapSession(t)
for stepi, s := range tt.steps {
nm := ms.netmapForResponse(&tailcfg.MapResponse{Debug: s.got})
if !reflect.DeepEqual(nm.Debug, s.want) {
t.Errorf("unexpected result at step index %v; got: %s", stepi, must.Get(json.Marshal(nm.Debug)))
}
}
})
}
}
// Verifies that copyDebugOptBools doesn't missing any opt.Bools.
func TestCopyDebugOptBools(t *testing.T) {
rt := reflect.TypeOf(tailcfg.Debug{})
for i := 0; i < rt.NumField(); i++ {
sf := rt.Field(i)
if sf.Type != reflect.TypeOf(opt.Bool("")) {
continue
}
var src, dst tailcfg.Debug
reflect.ValueOf(&src).Elem().Field(i).Set(reflect.ValueOf(opt.Bool("true")))
if src == (tailcfg.Debug{}) {
t.Fatalf("failed to set field %v", sf.Name)
}
copyDebugOptBools(&dst, &src)
if src != dst {
t.Fatalf("copyDebugOptBools didn't copy field %v", sf.Name)
}
}
}
func TestDeltaDERPMap(t *testing.T) {
regions1 := map[int]*tailcfg.DERPRegion{
1: {

16
ipn/ipnlocal/local.go
View File

@ -3036,7 +3036,7 @@ func (b *LocalBackend) authReconfig() {
rcfg := b.routerConfig(cfg, prefs, oneCGNATRoute)
dcfg := dnsConfigForNetmap(nm, prefs, b.logf, version.OS())
err = b.e.Reconfig(cfg, rcfg, dcfg, nm.Debug)
err = b.e.Reconfig(cfg, rcfg, dcfg)
if err == wgengine.ErrNoChanges {
return
}
@ -3052,16 +3052,6 @@ func (b *LocalBackend) authReconfig() {
// a runtime.GOOS.
func shouldUseOneCGNATRoute(nm *netmap.NetworkMap, logf logger.Logf, versionOS string) bool {
// Explicit enabling or disabling always take precedence.
// Old way from control plane, pre capver 71:
// TODO(bradfitz): delete this path, once the control server starts
// sending it in nodeAttr.
if nm.Debug != nil {
if v, ok := nm.Debug.OneCGNATRoute.Get(); ok {
logf("[v1] shouldUseOneCGNATRoute: explicit=%v", v)
return v
}
}
if v, ok := controlclient.ControlOneCGNATSetting().Get(); ok {
logf("[v1] shouldUseOneCGNATRoute: explicit=%v", v)
return v
@ -3663,7 +3653,7 @@ func (b *LocalBackend) enterStateLockedOnEntry(newState ipn.State) {
b.blockEngineUpdates(true)
fallthrough
case ipn.Stopped:
err := b.e.Reconfig(&wgcfg.Config{}, &router.Config{}, &dns.Config{}, nil)
err := b.e.Reconfig(&wgcfg.Config{}, &router.Config{}, &dns.Config{})
if err != nil {
b.logf("Reconfig(down): %v", err)
}
@ -3805,7 +3795,7 @@ func (b *LocalBackend) stateMachine() {
// a status update that predates the "I've shut down" update.
func (b *LocalBackend) stopEngineAndWait() {
b.logf("stopEngineAndWait...")
b.e.Reconfig(&wgcfg.Config{}, &router.Config{}, &dns.Config{}, nil)
b.e.Reconfig(&wgcfg.Config{}, &router.Config{}, &dns.Config{})
b.requestEngineStatusAndWait()
b.logf("stopEngineAndWait: done.")
}

28
tailcfg/tailcfg.go
View File

@ -1742,15 +1742,10 @@ type ControlIPCandidate struct {
Priority int `json:",omitempty"`
}
// Debug were instructions from the control server to the client to adjust debug
// settings.
//
// Deprecated: these should no longer be used. Most have been deleted except for some They're a weird mix of declartive
// and imperative. The imperative ones should be c2n requests instead, and the
// declarative ones (at least the bools) should generally be self
// Node.Capabilities.
//
// TODO(bradfitz): start migrating the imperative ones to c2n requests.
// Debug used to be a miscellaneous set of declarative debug config changes and
// imperative debug commands. They've since been mostly migrated to node
// attributes (MapResponse.Node.Capabilities) for the declarative things and c2n
// requests for the imperative things. Not much remains here. Don't add more.
type Debug struct {
// SleepSeconds requests that the client sleep for the
// provided number of seconds.
@ -1760,21 +1755,6 @@ type Debug struct {
// state machine.
SleepSeconds float64 `json:",omitempty"`
// RandomizeClientPort is whether magicsock should UDP bind to :0 to get a
// random local port, ignoring any configured fixed port.
//
// Deprecated: use NodeAttrRandomizeClientPort instead. This is kept in code
// only so the control plane can use it to send to old clients.
RandomizeClientPort bool `json:",omitempty"`
// OneCGNATRoute controls whether the client should prefer to make one big
// CGNAT /10 route rather than a /32 per peer.
//
// Deprecated: use NodeAttrOneCGNATEnable or NodeAttrOneCGNATDisable
// instead. This is kept in code only so the control plane can use it to
// send to old clients.
OneCGNATRoute opt.Bool `json:",omitempty"`
// DisableLogTail disables the logtail package. Once disabled it can't be
// re-enabled for the lifetime of the process.
//

10
types/netmap/netmap.go
View File

@ -8,7 +8,6 @@
"encoding/json"
"fmt"
"net/netip"
"reflect"
"strings"
"time"
@ -53,9 +52,6 @@ type NetworkMap struct {
// between updates and should not be modified.
DERPMap *tailcfg.DERPMap
// Debug knobs from control server for debug or feature gating.
Debug *tailcfg.Debug
// ControlHealth are the list of health check problems for this
// node from the perspective of the control plane.
// If empty, there are no known problems from the control plane's
@ -182,10 +178,6 @@ func (nm *NetworkMap) printConciseHeader(buf *strings.Builder) {
}
}
fmt.Fprintf(buf, " u=%s", login)
if nm.Debug != nil {
j, _ := json.Marshal(nm.Debug)
fmt.Fprintf(buf, " debug=%s", j)
}
fmt.Fprintf(buf, " %v", nm.Addresses)
buf.WriteByte('\n')
}
@ -204,7 +196,7 @@ func (a *NetworkMap) equalConciseHeader(b *NetworkMap) bool {
return false
}
}
return (a.Debug == nil && b.Debug == nil) || reflect.DeepEqual(a.Debug, b.Debug)
return true
}
// printPeerConcise appends to buf a line representing the peer p.

16
types/netmap/netmap_test.go
View File

@ -59,22 +59,6 @@ func TestNetworkMapConcise(t *testing.T) {
},
want: "netmap: self: [AQEBA] auth=machine-unknown u=? []\n [AgICA] D2 : 192.168.0.100:12 192.168.0.100:12354\n [AwMDA] D4 : 10.2.0.100:12 10.1.0.100:12345\n",
},
{
name: "debug_non_nil",
nm: &NetworkMap{
NodeKey: testNodeKey(1),
Debug: &tailcfg.Debug{},
},
want: "netmap: self: [AQEBA] auth=machine-unknown u=? debug={} []\n",
},
{
name: "debug_values",
nm: &NetworkMap{
NodeKey: testNodeKey(1),
Debug: &tailcfg.Debug{SleepSeconds: 1.5},
},
want: "netmap: self: [AQEBA] auth=machine-unknown u=? debug={\"SleepSeconds\":1.5} []\n",
},
} {
t.Run(tt.name, func(t *testing.T) {
var got string

4
wgengine/bench/wg.go
View File

@ -114,7 +114,7 @@ func setupWGTest(b *testing.B, logf logger.Logf, traf *TrafficGen, a1, a2 netip.
AllowedIPs: []netip.Prefix{a1},
}
c2.Peers = []wgcfg.Peer{p}
e2.Reconfig(&c2, &router.Config{}, new(dns.Config), nil)
e2.Reconfig(&c2, &router.Config{}, new(dns.Config))
e1waitDoneOnce.Do(wait.Done)
})
@ -151,7 +151,7 @@ func setupWGTest(b *testing.B, logf logger.Logf, traf *TrafficGen, a1, a2 netip.
AllowedIPs: []netip.Prefix{a2},
}
c1.Peers = []wgcfg.Peer{p}
e1.Reconfig(&c1, &router.Config{}, new(dns.Config), nil)
e1.Reconfig(&c1, &router.Config{}, new(dns.Config))
e2waitDoneOnce.Do(wait.Done)
})

8
wgengine/magicsock/magicsock.go
View File

@ -13,7 +13,6 @@
"io"
"net"
"net/netip"
"reflect"
"runtime"
"slices"
"strconv"
@ -1756,17 +1755,12 @@ func (c *Conn) SetNetworkMap(nm *netmap.NetworkMap) {
}
priorNetmap := c.netMap
var priorDebug *tailcfg.Debug
if priorNetmap != nil {
priorDebug = priorNetmap.Debug
}
debugChanged := !reflect.DeepEqual(priorDebug, nm.Debug)
metricNumPeers.Set(int64(len(nm.Peers)))
// Update c.netMap regardless, before the following early return.
c.netMap = nm
if priorNetmap != nil && nodesEqual(priorNetmap.Peers, nm.Peers) && !debugChanged {
if priorNetmap != nil && nodesEqual(priorNetmap.Peers, nm.Peers) {
// The rest of this function is all adjusting state for peers that have
// changed. But if the set of peers is equal and the debug flags (for
// silent disco) haven't changed, no need to do anything else.

7
wgengine/userspace.go
View File

@ -766,7 +766,9 @@ func hasOverlap(aips, rips []netip.Prefix) bool {
return false
}
func (e *userspaceEngine) Reconfig(cfg *wgcfg.Config, routerCfg *router.Config, dnsCfg *dns.Config, debug *tailcfg.Debug) error {
var randomizeClientPort = controlclient.RandomizeClientPort
func (e *userspaceEngine) Reconfig(cfg *wgcfg.Config, routerCfg *router.Config, dnsCfg *dns.Config) error {
if routerCfg == nil {
panic("routerCfg must not be nil")
}
@ -792,8 +794,7 @@ func (e *userspaceEngine) Reconfig(cfg *wgcfg.Config, routerCfg *router.Config,
e.mu.Unlock()
listenPort := e.confListenPort
if controlclient.RandomizeClientPort() || // new way (capver 70)
debug != nil && debug.RandomizeClientPort { // old way which server might still send (as of 2023-08-16)
if randomizeClientPort() {
listenPort = 0
}

13
wgengine/userspace_test.go
View File

@ -121,7 +121,7 @@ func TestUserspaceEngineReconfig(t *testing.T) {
}
e.SetNetworkMap(nm)
err = e.Reconfig(cfg, routerCfg, &dns.Config{}, nil)
err = e.Reconfig(cfg, routerCfg, &dns.Config{})
if err != nil {
t.Fatal(err)
}
@ -143,6 +143,8 @@ func TestUserspaceEngineReconfig(t *testing.T) {
}
func TestUserspaceEnginePortReconfig(t *testing.T) {
tstest.Replace(t, &randomizeClientPort, func() bool { return false })
flakytest.Mark(t, "https://github.com/tailscale/tailscale/issues/2855")
const defaultPort = 49983
// Keep making a wgengine until we find an unused port
@ -181,13 +183,15 @@ func TestUserspaceEnginePortReconfig(t *testing.T) {
},
}
routerCfg := &router.Config{}
if err := ue.Reconfig(cfg, routerCfg, &dns.Config{}, nil); err != nil {
if err := ue.Reconfig(cfg, routerCfg, &dns.Config{}); err != nil {
t.Fatal(err)
}
if got := ue.magicConn.LocalPort(); got != startingPort {
t.Errorf("no debug setting changed local port to %d from %d", got, startingPort)
}
if err := ue.Reconfig(cfg, routerCfg, &dns.Config{}, &tailcfg.Debug{RandomizeClientPort: true}); err != nil {
randomizeClientPort = func() bool { return true }
if err := ue.Reconfig(cfg, routerCfg, &dns.Config{}); err != nil {
t.Fatal(err)
}
if got := ue.magicConn.LocalPort(); got == startingPort {
@ -195,7 +199,8 @@ func TestUserspaceEnginePortReconfig(t *testing.T) {
}
lastPort := ue.magicConn.LocalPort()
if err := ue.Reconfig(cfg, routerCfg, &dns.Config{}, nil); err != nil {
randomizeClientPort = func() bool { return false }
if err := ue.Reconfig(cfg, routerCfg, &dns.Config{}); err != nil {
t.Fatal(err)
}
if startingPort == defaultPort {

4
wgengine/watchdog.go
View File

@ -119,8 +119,8 @@ func (e *watchdogEngine) watchdog(name string, fn func()) {
})
}
func (e *watchdogEngine) Reconfig(cfg *wgcfg.Config, routerCfg *router.Config, dnsCfg *dns.Config, debug *tailcfg.Debug) error {
return e.watchdogErr("Reconfig", func() error { return e.wrap.Reconfig(cfg, routerCfg, dnsCfg, debug) })
func (e *watchdogEngine) Reconfig(cfg *wgcfg.Config, routerCfg *router.Config, dnsCfg *dns.Config) error {
return e.watchdogErr("Reconfig", func() error { return e.wrap.Reconfig(cfg, routerCfg, dnsCfg) })
}
func (e *watchdogEngine) GetFilter() *filter.Filter {
return e.wrap.GetFilter()

4
wgengine/wgengine.go
View File

@ -72,10 +72,8 @@ type Engine interface {
// This is called whenever tailcontrol (the control plane)
// sends an updated network map.
//
// The *tailcfg.Debug parameter can be nil.
//
// The returned error is ErrNoChanges if no changes were made.
Reconfig(*wgcfg.Config, *router.Config, *dns.Config, *tailcfg.Debug) error
Reconfig(*wgcfg.Config, *router.Config, *dns.Config) error
// PeerForIP returns the node to which the provided IP routes,
// if any. If none is found, (nil, false) is returned.