update kubernetes dependencies to v1.25.0

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/google.golang.org/grpc/stream.go

@@ -36,6 +36,7 @@ import (
 	"google.golang.org/grpc/internal/channelz"
 	"google.golang.org/grpc/internal/grpcrand"
 	"google.golang.org/grpc/internal/grpcutil"
+	imetadata "google.golang.org/grpc/internal/metadata"
 	iresolver "google.golang.org/grpc/internal/resolver"
 	"google.golang.org/grpc/internal/serviceconfig"
 	"google.golang.org/grpc/internal/transport"
@@ -46,10 +47,12 @@ import (
 )
 
 // StreamHandler defines the handler called by gRPC server to complete the
-// execution of a streaming RPC. If a StreamHandler returns an error, it
-// should be produced by the status package, or else gRPC will use
-// codes.Unknown as the status code and err.Error() as the status message
-// of the RPC.
+// execution of a streaming RPC.
+//
+// If a StreamHandler returns an error, it should either be produced by the
+// status package, or be one of the context errors. Otherwise, gRPC will use
+// codes.Unknown as the status code and err.Error() as the status message of the
+// RPC.
 type StreamHandler func(srv interface{}, stream ServerStream) error
 
 // StreamDesc represents a streaming RPC service's method specification.  Used
@@ -164,6 +167,11 @@ func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 }
 
 func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) {
+	if md, _, ok := metadata.FromOutgoingContextRaw(ctx); ok {
+		if err := imetadata.Validate(md); err != nil {
+			return nil, status.Error(codes.Internal, err.Error())
+		}
+	}
 	if channelz.IsOn() {
 		cc.incrCallsStarted()
 		defer func() {
@@ -274,35 +282,6 @@ func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *Client
 	if c.creds != nil {
 		callHdr.Creds = c.creds
 	}
-	var trInfo *traceInfo
-	if EnableTracing {
-		trInfo = &traceInfo{
-			tr: trace.New("grpc.Sent."+methodFamily(method), method),
-			firstLine: firstLine{
-				client: true,
-			},
-		}
-		if deadline, ok := ctx.Deadline(); ok {
-			trInfo.firstLine.deadline = time.Until(deadline)
-		}
-		trInfo.tr.LazyLog(&trInfo.firstLine, false)
-		ctx = trace.NewContext(ctx, trInfo.tr)
-	}
-	ctx = newContextWithRPCInfo(ctx, c.failFast, c.codec, cp, comp)
-	sh := cc.dopts.copts.StatsHandler
-	var beginTime time.Time
-	if sh != nil {
-		ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
-		beginTime = time.Now()
-		begin := &stats.Begin{
-			Client:         true,
-			BeginTime:      beginTime,
-			FailFast:       c.failFast,
-			IsClientStream: desc.ClientStreams,
-			IsServerStream: desc.ServerStreams,
-		}
-		sh.HandleRPC(ctx, begin)
-	}
 
 	cs := &clientStream{
 		callHdr:      callHdr,
@@ -316,7 +295,6 @@ func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *Client
 		cp:           cp,
 		comp:         comp,
 		cancel:       cancel,
-		beginTime:    beginTime,
 		firstAttempt: true,
 		onCommit:     onCommit,
 	}
@@ -325,16 +303,28 @@ func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *Client
 	}
 	cs.binlog = binarylog.GetMethodLogger(method)
 
-	// Only this initial attempt has stats/tracing.
-	// TODO(dfawley): move to newAttempt when per-attempt stats are implemented.
-	if err := cs.newAttemptLocked(sh, trInfo); err != nil {
+	cs.attempt, err = cs.newAttemptLocked(false /* isTransparent */)
+	if err != nil {
 		cs.finish(err)
 		return nil, err
 	}
 
-	op := func(a *csAttempt) error { return a.newStream() }
+	// Pick the transport to use and create a new stream on the transport.
+	// Assign cs.attempt upon success.
+	op := func(a *csAttempt) error {
+		if err := a.getTransport(); err != nil {
+			return err
+		}
+		if err := a.newStream(); err != nil {
+			return err
+		}
+		// Because this operation is always called either here (while creating
+		// the clientStream) or by the retry code while locked when replaying
+		// the operation, it is safe to access cs.attempt directly.
+		cs.attempt = a
+		return nil
+	}
 	if err := cs.withRetry(op, func() { cs.bufferForRetryLocked(0, op) }); err != nil {
-		cs.finish(err)
 		return nil, err
 	}
 
@@ -373,60 +363,104 @@ func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *Client
 	return cs, nil
 }
 
-// newAttemptLocked creates a new attempt with a transport.
-// If it succeeds, then it replaces clientStream's attempt with this new attempt.
-func (cs *clientStream) newAttemptLocked(sh stats.Handler, trInfo *traceInfo) (retErr error) {
-	newAttempt := &csAttempt{
+// newAttemptLocked creates a new csAttempt without a transport or stream.
+func (cs *clientStream) newAttemptLocked(isTransparent bool) (*csAttempt, error) {
+	if err := cs.ctx.Err(); err != nil {
+		return nil, toRPCErr(err)
+	}
+	if err := cs.cc.ctx.Err(); err != nil {
+		return nil, ErrClientConnClosing
+	}
+
+	ctx := newContextWithRPCInfo(cs.ctx, cs.callInfo.failFast, cs.callInfo.codec, cs.cp, cs.comp)
+	method := cs.callHdr.Method
+	sh := cs.cc.dopts.copts.StatsHandler
+	var beginTime time.Time
+	if sh != nil {
+		ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: cs.callInfo.failFast})
+		beginTime = time.Now()
+		begin := &stats.Begin{
+			Client:                    true,
+			BeginTime:                 beginTime,
+			FailFast:                  cs.callInfo.failFast,
+			IsClientStream:            cs.desc.ClientStreams,
+			IsServerStream:            cs.desc.ServerStreams,
+			IsTransparentRetryAttempt: isTransparent,
+		}
+		sh.HandleRPC(ctx, begin)
+	}
+
+	var trInfo *traceInfo
+	if EnableTracing {
+		trInfo = &traceInfo{
+			tr: trace.New("grpc.Sent."+methodFamily(method), method),
+			firstLine: firstLine{
+				client: true,
+			},
+		}
+		if deadline, ok := ctx.Deadline(); ok {
+			trInfo.firstLine.deadline = time.Until(deadline)
+		}
+		trInfo.tr.LazyLog(&trInfo.firstLine, false)
+		ctx = trace.NewContext(ctx, trInfo.tr)
+	}
+
+	if cs.cc.parsedTarget.Scheme == "xds" {
+		// Add extra metadata (metadata that will be added by transport) to context
+		// so the balancer can see them.
+		ctx = grpcutil.WithExtraMetadata(ctx, metadata.Pairs(
+			"content-type", grpcutil.ContentType(cs.callHdr.ContentSubtype),
+		))
+	}
+
+	return &csAttempt{
+		ctx:          ctx,
+		beginTime:    beginTime,
 		cs:           cs,
 		dc:           cs.cc.dopts.dc,
 		statsHandler: sh,
 		trInfo:       trInfo,
-	}
-	defer func() {
-		if retErr != nil {
-			// This attempt is not set in the clientStream, so it's finish won't
-			// be called. Call it here for stats and trace in case they are not
-			// nil.
-			newAttempt.finish(retErr)
-		}
-	}()
+	}, nil
+}
 
-	if err := cs.ctx.Err(); err != nil {
-		return toRPCErr(err)
-	}
+func (a *csAttempt) getTransport() error {
+	cs := a.cs
 
-	ctx := cs.ctx
-	if cs.cc.parsedTarget.Scheme == "xds" {
-		// Add extra metadata (metadata that will be added by transport) to context
-		// so the balancer can see them.
-		ctx = grpcutil.WithExtraMetadata(cs.ctx, metadata.Pairs(
-			"content-type", grpcutil.ContentType(cs.callHdr.ContentSubtype),
-		))
-	}
-	t, done, err := cs.cc.getTransport(ctx, cs.callInfo.failFast, cs.callHdr.Method)
+	var err error
+	a.t, a.done, err = cs.cc.getTransport(a.ctx, cs.callInfo.failFast, cs.callHdr.Method)
 	if err != nil {
+		if de, ok := err.(dropError); ok {
+			err = de.error
+			a.drop = true
+		}
 		return err
 	}
-	if trInfo != nil {
-		trInfo.firstLine.SetRemoteAddr(t.RemoteAddr())
+	if a.trInfo != nil {
+		a.trInfo.firstLine.SetRemoteAddr(a.t.RemoteAddr())
 	}
-	newAttempt.t = t
-	newAttempt.done = done
-	cs.attempt = newAttempt
 	return nil
 }
 
 func (a *csAttempt) newStream() error {
 	cs := a.cs
 	cs.callHdr.PreviousAttempts = cs.numRetries
-	s, err := a.t.NewStream(cs.ctx, cs.callHdr)
+	s, err := a.t.NewStream(a.ctx, cs.callHdr)
 	if err != nil {
-		// Return without converting to an RPC error so retry code can
-		// inspect.
-		return err
+		nse, ok := err.(*transport.NewStreamError)
+		if !ok {
+			// Unexpected.
+			return err
+		}
+
+		if nse.AllowTransparentRetry {
+			a.allowTransparentRetry = true
+		}
+
+		// Unwrap and convert error.
+		return toRPCErr(nse.Err)
 	}
-	cs.attempt.s = s
-	cs.attempt.p = &parser{r: s}
+	a.s = s
+	a.p = &parser{r: s}
 	return nil
 }
 
@@ -444,8 +478,7 @@ type clientStream struct {
 
 	cancel context.CancelFunc // cancels all attempts
 
-	sentLast  bool // sent an end stream
-	beginTime time.Time
+	sentLast bool // sent an end stream
 
 	methodConfig *MethodConfig
 
@@ -453,7 +486,7 @@ type clientStream struct {
 
 	retryThrottler *retryThrottler // The throttler active when the RPC began.
 
-	binlog *binarylog.MethodLogger // Binary logger, can be nil.
+	binlog binarylog.MethodLogger // Binary logger, can be nil.
 	// serverHeaderBinlogged is a boolean for whether server header has been
 	// logged. Server header will be logged when the first time one of those
 	// happens: stream.Header(), stream.Recv().
@@ -485,6 +518,7 @@ type clientStream struct {
 // csAttempt implements a single transport stream attempt within a
 // clientStream.
 type csAttempt struct {
+	ctx  context.Context
 	cs   *clientStream
 	t    transport.ClientTransport
 	s    *transport.Stream
@@ -503,6 +537,12 @@ type csAttempt struct {
 	trInfo *traceInfo
 
 	statsHandler stats.Handler
+	beginTime    time.Time
+
+	// set for newStream errors that may be transparently retried
+	allowTransparentRetry bool
+	// set for pick errors that are returned as a status
+	drop bool
 }
 
 func (cs *clientStream) commitAttemptLocked() {
@@ -520,95 +560,76 @@ func (cs *clientStream) commitAttempt() {
 }
 
 // shouldRetry returns nil if the RPC should be retried; otherwise it returns
-// the error that should be returned by the operation.
-func (cs *clientStream) shouldRetry(err error) error {
-	if cs.attempt.s == nil {
-		// Error from NewClientStream.
-		nse, ok := err.(*transport.NewStreamError)
-		if !ok {
-			// Unexpected, but assume no I/O was performed and the RPC is not
-			// fatal, so retry indefinitely.
-			return nil
-		}
+// the error that should be returned by the operation.  If the RPC should be
+// retried, the bool indicates whether it is being retried transparently.
+func (a *csAttempt) shouldRetry(err error) (bool, error) {
+	cs := a.cs
 
-		// Unwrap and convert error.
-		err = toRPCErr(nse.Err)
-
-		// Never retry DoNotRetry errors, which indicate the RPC should not be
-		// retried due to max header list size violation, etc.
-		if nse.DoNotRetry {
-			return err
-		}
-
-		// In the event of a non-IO operation error from NewStream, we never
-		// attempted to write anything to the wire, so we can retry
-		// indefinitely.
-		if !nse.PerformedIO {
-			return nil
-		}
+	if cs.finished || cs.committed || a.drop {
+		// RPC is finished or committed or was dropped by the picker; cannot retry.
+		return false, err
 	}
-	if cs.finished || cs.committed {
-		// RPC is finished or committed; cannot retry.
-		return err
+	if a.s == nil && a.allowTransparentRetry {
+		return true, nil
 	}
 	// Wait for the trailers.
 	unprocessed := false
-	if cs.attempt.s != nil {
-		<-cs.attempt.s.Done()
-		unprocessed = cs.attempt.s.Unprocessed()
+	if a.s != nil {
+		<-a.s.Done()
+		unprocessed = a.s.Unprocessed()
 	}
 	if cs.firstAttempt && unprocessed {
 		// First attempt, stream unprocessed: transparently retry.
-		return nil
+		return true, nil
 	}
 	if cs.cc.dopts.disableRetry {
-		return err
+		return false, err
 	}
 
 	pushback := 0
 	hasPushback := false
-	if cs.attempt.s != nil {
-		if !cs.attempt.s.TrailersOnly() {
-			return err
+	if a.s != nil {
+		if !a.s.TrailersOnly() {
+			return false, err
 		}
 
 		// TODO(retry): Move down if the spec changes to not check server pushback
 		// before considering this a failure for throttling.
-		sps := cs.attempt.s.Trailer()["grpc-retry-pushback-ms"]
+		sps := a.s.Trailer()["grpc-retry-pushback-ms"]
 		if len(sps) == 1 {
 			var e error
 			if pushback, e = strconv.Atoi(sps[0]); e != nil || pushback < 0 {
 				channelz.Infof(logger, cs.cc.channelzID, "Server retry pushback specified to abort (%q).", sps[0])
 				cs.retryThrottler.throttle() // This counts as a failure for throttling.
-				return err
+				return false, err
 			}
 			hasPushback = true
 		} else if len(sps) > 1 {
 			channelz.Warningf(logger, cs.cc.channelzID, "Server retry pushback specified multiple values (%q); not retrying.", sps)
 			cs.retryThrottler.throttle() // This counts as a failure for throttling.
-			return err
+			return false, err
 		}
 	}
 
 	var code codes.Code
-	if cs.attempt.s != nil {
-		code = cs.attempt.s.Status().Code()
+	if a.s != nil {
+		code = a.s.Status().Code()
 	} else {
-		code = status.Convert(err).Code()
+		code = status.Code(err)
 	}
 
 	rp := cs.methodConfig.RetryPolicy
 	if rp == nil || !rp.RetryableStatusCodes[code] {
-		return err
+		return false, err
 	}
 
 	// Note: the ordering here is important; we count this as a failure
 	// only if the code matched a retryable code.
 	if cs.retryThrottler.throttle() {
-		return err
+		return false, err
 	}
 	if cs.numRetries+1 >= rp.MaxAttempts {
-		return err
+		return false, err
 	}
 
 	var dur time.Duration
@@ -631,26 +652,32 @@ func (cs *clientStream) shouldRetry(err error) error {
 	select {
 	case <-t.C:
 		cs.numRetries++
-		return nil
+		return false, nil
 	case <-cs.ctx.Done():
 		t.Stop()
-		return status.FromContextError(cs.ctx.Err()).Err()
+		return false, status.FromContextError(cs.ctx.Err()).Err()
 	}
 }
 
 // Returns nil if a retry was performed and succeeded; error otherwise.
-func (cs *clientStream) retryLocked(lastErr error) error {
+func (cs *clientStream) retryLocked(attempt *csAttempt, lastErr error) error {
 	for {
-		cs.attempt.finish(toRPCErr(lastErr))
-		if err := cs.shouldRetry(lastErr); err != nil {
+		attempt.finish(toRPCErr(lastErr))
+		isTransparent, err := attempt.shouldRetry(lastErr)
+		if err != nil {
 			cs.commitAttemptLocked()
 			return err
 		}
 		cs.firstAttempt = false
-		if err := cs.newAttemptLocked(nil, nil); err != nil {
+		attempt, err = cs.newAttemptLocked(isTransparent)
+		if err != nil {
+			// Only returns error if the clientconn is closed or the context of
+			// the stream is canceled.
 			return err
 		}
-		if lastErr = cs.replayBufferLocked(); lastErr == nil {
+		// Note that the first op in the replay buffer always sets cs.attempt
+		// if it is able to pick a transport and create a stream.
+		if lastErr = cs.replayBufferLocked(attempt); lastErr == nil {
 			return nil
 		}
 	}
@@ -660,7 +687,10 @@ func (cs *clientStream) Context() context.Context {
 	cs.commitAttempt()
 	// No need to lock before using attempt, since we know it is committed and
 	// cannot change.
-	return cs.attempt.s.Context()
+	if cs.attempt.s != nil {
+		return cs.attempt.s.Context()
+	}
+	return cs.ctx
 }
 
 func (cs *clientStream) withRetry(op func(a *csAttempt) error, onSuccess func()) error {
@@ -690,7 +720,7 @@ func (cs *clientStream) withRetry(op func(a *csAttempt) error, onSuccess func())
 			cs.mu.Unlock()
 			return err
 		}
-		if err := cs.retryLocked(err); err != nil {
+		if err := cs.retryLocked(a, err); err != nil {
 			cs.mu.Unlock()
 			return err
 		}
@@ -721,7 +751,7 @@ func (cs *clientStream) Header() (metadata.MD, error) {
 		cs.binlog.Log(logEntry)
 		cs.serverHeaderBinlogged = true
 	}
-	return m, err
+	return m, nil
 }
 
 func (cs *clientStream) Trailer() metadata.MD {
@@ -739,10 +769,9 @@ func (cs *clientStream) Trailer() metadata.MD {
 	return cs.attempt.s.Trailer()
 }
 
-func (cs *clientStream) replayBufferLocked() error {
-	a := cs.attempt
+func (cs *clientStream) replayBufferLocked(attempt *csAttempt) error {
 	for _, f := range cs.buffer {
-		if err := f(a); err != nil {
+		if err := f(attempt); err != nil {
 			return err
 		}
 	}
@@ -790,22 +819,17 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
 	if len(payload) > *cs.callInfo.maxSendMessageSize {
 		return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(payload), *cs.callInfo.maxSendMessageSize)
 	}
-	msgBytes := data // Store the pointer before setting to nil. For binary logging.
 	op := func(a *csAttempt) error {
-		err := a.sendMsg(m, hdr, payload, data)
-		// nil out the message and uncomp when replaying; they are only needed for
-		// stats which is disabled for subsequent attempts.
-		m, data = nil, nil
-		return err
+		return a.sendMsg(m, hdr, payload, data)
 	}
 	err = cs.withRetry(op, func() { cs.bufferForRetryLocked(len(hdr)+len(payload), op) })
 	if cs.binlog != nil && err == nil {
 		cs.binlog.Log(&binarylog.ClientMessage{
 			OnClientSide: true,
-			Message:      msgBytes,
+			Message:      data,
 		})
 	}
-	return
+	return err
 }
 
 func (cs *clientStream) RecvMsg(m interface{}) error {
@@ -937,7 +961,7 @@ func (a *csAttempt) sendMsg(m interface{}, hdr, payld, data []byte) error {
 		return io.EOF
 	}
 	if a.statsHandler != nil {
-		a.statsHandler.HandleRPC(cs.ctx, outPayload(true, m, data, payld, time.Now()))
+		a.statsHandler.HandleRPC(a.ctx, outPayload(true, m, data, payld, time.Now()))
 	}
 	if channelz.IsOn() {
 		a.t.IncrMsgSent()
@@ -985,7 +1009,7 @@ func (a *csAttempt) recvMsg(m interface{}, payInfo *payloadInfo) (err error) {
 		a.mu.Unlock()
 	}
 	if a.statsHandler != nil {
-		a.statsHandler.HandleRPC(cs.ctx, &stats.InPayload{
+		a.statsHandler.HandleRPC(a.ctx, &stats.InPayload{
 			Client:   true,
 			RecvTime: time.Now(),
 			Payload:  m,
@@ -1047,12 +1071,12 @@ func (a *csAttempt) finish(err error) {
 	if a.statsHandler != nil {
 		end := &stats.End{
 			Client:    true,
-			BeginTime: a.cs.beginTime,
+			BeginTime: a.beginTime,
 			EndTime:   time.Now(),
 			Trailer:   tr,
 			Error:     err,
 		}
-		a.statsHandler.HandleRPC(a.cs.ctx, end)
+		a.statsHandler.HandleRPC(a.ctx, end)
 	}
 	if a.trInfo != nil && a.trInfo.tr != nil {
 		if err == nil {
@@ -1357,8 +1381,10 @@ func (as *addrConnStream) finish(err error) {
 
 // ServerStream defines the server-side behavior of a streaming RPC.
 //
-// All errors returned from ServerStream methods are compatible with the
-// status package.
+// Errors returned from ServerStream methods are compatible with the status
+// package.  However, the status code will often not match the RPC status as
+// seen by the client application, and therefore, should not be relied upon for
+// this purpose.
 type ServerStream interface {
 	// SetHeader sets the header metadata. It may be called multiple times.
 	// When call multiple times, all the provided metadata will be merged.
@@ -1421,7 +1447,7 @@ type serverStream struct {
 
 	statsHandler stats.Handler
 
-	binlog *binarylog.MethodLogger
+	binlog binarylog.MethodLogger
 	// serverHeaderBinlogged indicates whether server header has been logged. It
 	// will happen when one of the following two happens: stream.SendHeader(),
 	// stream.Send().
@@ -1441,11 +1467,20 @@ func (ss *serverStream) SetHeader(md metadata.MD) error {
 	if md.Len() == 0 {
 		return nil
 	}
+	err := imetadata.Validate(md)
+	if err != nil {
+		return status.Error(codes.Internal, err.Error())
+	}
 	return ss.s.SetHeader(md)
 }
 
 func (ss *serverStream) SendHeader(md metadata.MD) error {
-	err := ss.t.WriteHeader(ss.s, md)
+	err := imetadata.Validate(md)
+	if err != nil {
+		return status.Error(codes.Internal, err.Error())
+	}
+
+	err = ss.t.WriteHeader(ss.s, md)
 	if ss.binlog != nil && !ss.serverHeaderBinlogged {
 		h, _ := ss.s.Header()
 		ss.binlog.Log(&binarylog.ServerHeader{
@@ -1460,6 +1495,9 @@ func (ss *serverStream) SetTrailer(md metadata.MD) {
 	if md.Len() == 0 {
 		return
 	}
+	if err := imetadata.Validate(md); err != nil {
+		logger.Errorf("stream: failed to validate md when setting trailer, err: %v", err)
+	}
 	ss.s.SetTrailer(md)
 }