Merge pull request #7240 from thaJeztah/bump_grpc

vendor: google.golang.org/grpc v1.83.2

vendor.mod

@@ -106,6 +106,6 @@ require (
 	golang.org/x/time v0.15.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20260526163538-3dc84a4a5aaa // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260526163538-3dc84a4a5aaa // indirect
-	google.golang.org/grpc v1.82.1 // indirect
+	google.golang.org/grpc v1.83.2 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 )

vendor.sum

@@ -281,8 +281,8 @@ google.golang.org/genproto/googleapis/api v0.0.0-20260526163538-3dc84a4a5aaa h1:
 google.golang.org/genproto/googleapis/api v0.0.0-20260526163538-3dc84a4a5aaa/go.mod h1:q4lMZS6kskjT5HvCPrnnypcDPVJqT/f4nfxmkE7gryY=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20260526163538-3dc84a4a5aaa h1:mZHHdPZl0dbGHCflZgAq/Q468DWVFcU2whhB2KAo8fk=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20260526163538-3dc84a4a5aaa/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
-google.golang.org/grpc v1.82.1 h1:NnAxzGRA0677vCa4BUkOAnO5+FfQqVl9iUXeD0IqcGE=
-google.golang.org/grpc v1.82.1/go.mod h1:yzTZ1TB1Z3SG+LIYaI+WiE8D5+PZ3ArnrSp8zF3+/ZA=
+google.golang.org/grpc v1.83.2 h1:EManeRomTObA0BU7I8vXgg/78uE5MJ9M8B39EX2WscU=
+google.golang.org/grpc v1.83.2/go.mod h1:YPI1hK3kDked6iHvgX3tR0y+nX/qpMFKhPgFsokw1S8=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
 google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=

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

@@ -24,12 +24,10 @@ import (
 	"fmt"
 	"math"
 	"net/url"
-	"os"
 	"slices"
 	"strings"
 	"sync"
 	"sync/atomic"
-	"syscall"
 	"time"
 
 	"google.golang.org/grpc/balancer"
@@ -1573,26 +1571,13 @@ func (ac *addrConn) createTransport(ctx context.Context, addr resolver.Address,
 // to the provided transport.GoAwayInfo, as specified by gRFC A94:
 // https://github.com/grpc/proposal/blob/master/A94-grpc-subchannel-disconnections-metrics.md
 func disconnectErrorString(info transport.GoAwayInfo) string {
-	err := info.Err
-	var sysErr syscall.Errno
-	switch {
-	case info.Reason != transport.GoAwayInvalid:
+	if info.Reason != transport.GoAwayInvalid {
 		return fmt.Sprintf("GOAWAY %s", info.GoAwayCode.String())
-	case err == nil:
-		return "unknown"
-	case errors.Is(err, context.Canceled):
-		return "subchannel shutdown"
-	case errors.Is(err, syscall.ECONNRESET):
-		return "connection reset"
-	case errors.Is(err, syscall.ETIMEDOUT), errors.Is(err, context.DeadlineExceeded), errors.Is(err, os.ErrDeadlineExceeded):
-		return "connection timed out"
-	case errors.Is(err, syscall.ECONNABORTED):
-		return "connection aborted"
-	case errors.As(err, &sysErr):
-		return "socket error"
-	default:
+	}
+	if info.Err == nil {
 		return "unknown"
 	}
+	return disconnectErrorLabel(info.Err)
 }
 
 // startHealthCheck starts the health checking stream (RPC) to watch the health

vendor/google.golang.org/grpc/clientconn_disconnect_reason_noplan9.go

@@ -0,0 +1,48 @@
+//go:build !plan9
+
+/*
+ *
+ * Copyright 2026 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"context"
+	"errors"
+	"os"
+	"syscall"
+)
+
+// disconnectErrorLabel returns the grpc.disconnect_error metric label for a
+// transport error, as specified by gRFC A94.
+func disconnectErrorLabel(err error) string {
+	var sysErr syscall.Errno
+	switch {
+	case errors.Is(err, context.Canceled):
+		return "subchannel shutdown"
+	case errors.Is(err, syscall.ECONNRESET):
+		return "connection reset"
+	case errors.Is(err, syscall.ETIMEDOUT), errors.Is(err, context.DeadlineExceeded), errors.Is(err, os.ErrDeadlineExceeded):
+		return "connection timed out"
+	case errors.Is(err, syscall.ECONNABORTED):
+		return "connection aborted"
+	case errors.As(err, &sysErr):
+		return "socket error"
+	default:
+		return "unknown"
+	}
+}

vendor/google.golang.org/grpc/clientconn_disconnect_reason_plan9.go

@@ -0,0 +1,39 @@
+/*
+ *
+ * Copyright 2026 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"context"
+	"errors"
+	"os"
+)
+
+// disconnectErrorLabel returns the grpc.disconnect_error metric label for a
+// transport error, as specified by gRFC A94. syscall.Errno does not exist on
+// plan9, so only the portable classifications are available.
+func disconnectErrorLabel(err error) string {
+	switch {
+	case errors.Is(err, context.Canceled):
+		return "subchannel shutdown"
+	case errors.Is(err, context.DeadlineExceeded), errors.Is(err, os.ErrDeadlineExceeded):
+		return "connection timed out"
+	default:
+		return "unknown"
+	}
+}

vendor/google.golang.org/grpc/internal/envconfig/envconfig.go

@@ -150,8 +150,18 @@ var (
 	// throttling limit if unforeseen issues arise, and it will be removed in a
 	// future release.
 	//
-	// TODO: Remove this env var once v1.83.0 is release.
+	// TODO: Remove this env var once v1.83.0 is released.
 	ControlBufferThrottleLimit = uint64FromEnv("GRPC_GO_EXPERIMENTAL_CONTROL_BUFFER_THROTTLE_LIMIT", 100, 1, 10000)
+
+	// EnableReceiveBufferCompaction enables the compaction of data buffers
+	// to reduce the number of buffers in the receive buffer.
+	//
+	// This environment variable serves as an escape hatch to disable the
+	// feature if unforeseen issues arise, and it will be removed in a future
+	// release.
+	//
+	// TODO: Remove this env var once v1.85.0 is released.
+	EnableReceiveBufferCompaction = boolFromEnv("GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION", true)
 )
 
 func boolFromEnv(envVar string, def bool) bool {

vendor/google.golang.org/grpc/internal/envconfig/xds.go

@@ -69,9 +69,8 @@ var (
 	// https://github.com/grpc/proposal/blob/master/A87-mtls-spiffe-support.md
 	XDSSPIFFEEnabled = boolFromEnv("GRPC_EXPERIMENTAL_XDS_MTLS_SPIFFE", false)
 
-	// XDSHTTPConnectEnabled is true if gRPC should parse custom Metadata
-	// configuring use of an HTTP CONNECT proxy via xDS from cluster resources.
-	// For more details, see:
+	// XDSHTTPConnectEnabled controls support for dynamic HTTP CONNECT proxying
+	// configured via the xDS control plane. For more details, see:
 	// https://github.com/grpc/proposal/blob/master/A86-xds-http-connect.md
 	XDSHTTPConnectEnabled = boolFromEnv("GRPC_EXPERIMENTAL_XDS_HTTP_CONNECT", false)
 
@@ -88,7 +87,7 @@ var (
 	// XDSORCAToLRSPropEnabled controls whether ORCA metrics are explicitly
 	// filtered and prefix-propagated to the LRS server. For more details, see:
 	// https://github.com/grpc/proposal/blob/master/A85-lrs-custom-metrics-changes.md
-	XDSORCAToLRSPropEnabled = boolFromEnv("GRPC_EXPERIMENTAL_XDS_ORCA_LRS_PROPAGATION", false)
+	XDSORCAToLRSPropEnabled = boolFromEnv("GRPC_EXPERIMENTAL_XDS_ORCA_LRS_PROPAGATION", true)
 
 	// XDSClientExtProcEnabled indicates whether ExtProc filter is enabled on
 	// the client side. For more details, see:

vendor/google.golang.org/grpc/internal/grpcsync/callback_serializer.go

@@ -20,10 +20,15 @@ package grpcsync
 
 import (
 	"context"
+	"errors"
 
 	"google.golang.org/grpc/internal/buffer"
 )
 
+// ErrSerializerClosed is returned by ScheduleAndWait if the CallbackSerializer
+// was closed before the callback could be scheduled.
+var ErrSerializerClosed = errors.New("callback serializer is closed")
+
 // CallbackSerializer provides a mechanism to schedule callbacks in a
 // synchronized manner. It provides a FIFO guarantee on the order of execution
 // of scheduled callbacks. New callbacks can be scheduled by invoking the
@@ -77,6 +82,27 @@ func (cs *CallbackSerializer) ScheduleOr(f func(ctx context.Context), onFailure
 	}
 }
 
+// ScheduleAndWait schedules the provided callback function f to be executed in
+// the order it was added and blocks until f has run. If the context passed to
+// NewCallbackSerializer was canceled before this method is called, f is not run
+// and ScheduleAndWait returns ErrSerializerClosed.
+//
+// Callbacks are expected to honor the context when performing any blocking
+// operations, and should return early when the context is canceled.
+func (cs *CallbackSerializer) ScheduleAndWait(f func(ctx context.Context)) error {
+	done := make(chan struct{})
+	var err error
+	cs.ScheduleOr(func(ctx context.Context) {
+		f(ctx)
+		close(done)
+	}, func() {
+		err = ErrSerializerClosed
+		close(done)
+	})
+	<-done
+	return err
+}
+
 func (cs *CallbackSerializer) run(ctx context.Context) {
 	defer close(cs.done)
 

vendor/google.golang.org/grpc/internal/mem/buffer_pool.go

@@ -26,12 +26,26 @@ import (
 	"slices"
 	"sort"
 	"sync"
+
+	"google.golang.org/grpc/internal"
 )
 
 const (
 	goPageSize = 4 * 1024 // 4KiB. N.B. this must be a power of 2.
 )
 
+var (
+	// BufferPoolingThreshold is the minimum size of a buffer that can be pooled.
+	// This is used to determine whether to pool buffers or allocate them directly.
+	BufferPoolingThreshold = 1 << 10
+)
+
+func init() {
+	internal.SetBufferPoolingThresholdForTesting = func(threshold int) {
+		BufferPoolingThreshold = threshold
+	}
+}
+
 var uintSize = bits.UintSize // use a variable for mocking during tests.
 
 // bufferPool is a copy of the public bufferPool interface used to avoid

vendor/google.golang.org/grpc/internal/resolver/config_selector.go

@@ -24,7 +24,6 @@ import (
 	"sync"
 
 	"google.golang.org/grpc/internal/serviceconfig"
-	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/resolver"
 )
 
@@ -52,82 +51,7 @@ type RPCConfig struct {
 	Context      context.Context
 	MethodConfig serviceconfig.MethodConfig // configuration to use for this RPC
 	OnCommitted  func()                     // Called when the RPC has been committed (retries no longer possible)
-	Interceptor  ClientInterceptor
-}
-
-// ClientStream is the same as grpc.ClientStream, but defined here for circular
-// dependency reasons.
-type ClientStream interface {
-	// Header returns the header metadata received from the server if there
-	// is any. It blocks if the metadata is not ready to read.
-	Header() (metadata.MD, error)
-	// Trailer returns the trailer metadata from the server, if there is any.
-	// It must only be called after stream.CloseAndRecv has returned, or
-	// stream.Recv has returned a non-nil error (including io.EOF).
-	Trailer() metadata.MD
-	// CloseSend closes the send direction of the stream. It closes the stream
-	// when non-nil error is met. It is also not safe to call CloseSend
-	// concurrently with SendMsg.
-	CloseSend() error
-	// Context returns the context for this stream.
-	//
-	// It should not be called until after Header or RecvMsg has returned. Once
-	// called, subsequent client-side retries are disabled.
-	Context() context.Context
-	// SendMsg is generally called by generated code. On error, SendMsg aborts
-	// the stream. If the error was generated by the client, the status is
-	// returned directly; otherwise, io.EOF is returned and the status of
-	// the stream may be discovered using RecvMsg.
-	//
-	// SendMsg blocks until:
-	//   - There is sufficient flow control to schedule m with the transport, or
-	//   - The stream is done, or
-	//   - The stream breaks.
-	//
-	// SendMsg does not wait until the message is received by the server. An
-	// untimely stream closure may result in lost messages. To ensure delivery,
-	// users should ensure the RPC completed successfully using RecvMsg.
-	//
-	// It is safe to have a goroutine calling SendMsg and another goroutine
-	// calling RecvMsg on the same stream at the same time, but it is not safe
-	// to call SendMsg on the same stream in different goroutines. It is also
-	// not safe to call CloseSend concurrently with SendMsg.
-	SendMsg(m any) error
-	// RecvMsg blocks until it receives a message into m or the stream is
-	// done. It returns io.EOF when the stream completes successfully. On
-	// any other error, the stream is aborted and the error contains the RPC
-	// status.
-	//
-	// It is safe to have a goroutine calling SendMsg and another goroutine
-	// calling RecvMsg on the same stream at the same time, but it is not
-	// safe to call RecvMsg on the same stream in different goroutines.
-	RecvMsg(m any) error
-}
-
-// ClientInterceptor is an interceptor for gRPC client streams.
-type ClientInterceptor interface {
-	// NewStream creates a ClientStream for an RPC.
-	//
-	// Implementations must delegate stream creation to the provided newStream
-	// function. To intercept or override stream behavior, implementations
-	// may wrap the ClientStream returned by the delegate.
-	//
-	// Note: RPCInfo.Context is currently unused and will be nil.
-	//
-	// The done function is invoked when the RPC has finished using its
-	// underlying connection or if a connection could not be assigned. Because
-	// interceptors operate at the application layer, RPC operations may
-	// continue on the ClientStream even after done has been called. The
-	// caller must ensure done is non-nil.
-	//
-	// To ensure RPC completion notifications propagate through the entire
-	// interceptor chain, implementations must ensure that the done function
-	// passed to the delegate newStream invokes the done function passed to
-	// NewStream.
-	NewStream(ctx context.Context, ri RPCInfo, done func(), newStream func(ctx context.Context, done func()) (ClientStream, error)) (ClientStream, error)
-	// Close closes the interceptor. Once called, no new calls to NewStream are
-	// accepted. Ongoing calls to NewStream are allowed to complete.
-	Close()
+	Interceptor  any
 }
 
 // ServerInterceptor is an interceptor for incoming RPC's on gRPC server side.

vendor/google.golang.org/grpc/internal/transport/client_stream.go

@@ -39,9 +39,8 @@ const nonGRPCDataMaxLen = 1024
 type ClientStream struct {
 	Stream // Embed for common stream functionality.
 
-	ct       *http2Client
-	done     chan struct{} // closed at the end of stream to unblock writers.
-	doneFunc func()        // invoked at the end of stream.
+	ct   *http2Client
+	done chan struct{} // closed at the end of stream to unblock writers.
 
 	headerChan chan struct{} // closed to indicate the end of header metadata.
 	header     metadata.MD   // the received header metadata

vendor/google.golang.org/grpc/internal/transport/handler_server.go

@@ -424,7 +424,7 @@ func (ht *serverHandlerTransport) HandleStreams(ctx context.Context, startStream
 		st:               ht,
 		headerWireLength: 0, // won't have access to header wire length until golang/go#18997.
 	}
-	s.Stream.buf.init()
+	s.Stream.buf.init(ht.bufferPool)
 	s.readRequester = s
 	s.trReader = transportReader{
 		reader:        recvBufferReader{ctx: s.ctx, ctxDone: s.ctx.Done(), recv: &s.buf},

vendor/google.golang.org/grpc/internal/transport/http2_client.go

@@ -498,10 +498,9 @@ func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr, handler s
 		ct:           t,
 		done:         make(chan struct{}),
 		headerChan:   make(chan struct{}),
-		doneFunc:     callHdr.DoneFunc,
 		statsHandler: handler,
 	}
-	s.Stream.buf.init()
+	s.Stream.buf.init(t.bufferPool)
 	s.Stream.wq.init(defaultWriteQuota, s.done)
 	s.readRequester = s
 	// The client side stream context should have exactly the same life cycle with the user provided context.
@@ -998,9 +997,6 @@ func (t *http2Client) closeStream(s *ClientStream, err error, rst bool, rstCode
 	t.controlBuf.executeAndPut(addBackStreamQuota, cleanup)
 	// This will unblock write.
 	close(s.done)
-	if s.doneFunc != nil {
-		s.doneFunc()
-	}
 }
 
 // Close kicks off the shutdown process of the transport. This should be called

vendor/google.golang.org/grpc/internal/transport/http2_server.go

@@ -407,7 +407,7 @@ func (t *http2Server) operateHeaders(ctx context.Context, frame *http2.MetaHeade
 		st:               t,
 		headerWireLength: int(frame.Header().Length),
 	}
-	s.Stream.buf.init()
+	s.Stream.buf.init(t.bufferPool)
 	var (
 		// if false, content-type was missing or invalid
 		isGRPC      = false
@@ -522,6 +522,12 @@ func (t *http2Server) operateHeaders(ctx context.Context, frame *http2.MetaHeade
 		delete(mdata, "host")
 	}
 
+	// If :authority is still missing, i.e. no host or :authority header is
+	// present, reject the request as invalid.
+	if len(mdata[":authority"]) == 0 {
+		t.writeEarlyAbort(streamID, s.contentSubtype, status.New(codes.Internal, "no host or :authority header present"), http.StatusBadRequest, !frame.StreamEnded())
+		return nil
+	}
 	if frame.StreamEnded() {
 		// s is just created by the caller. No lock needed.
 		s.state = streamReadDone

vendor/google.golang.org/grpc/internal/transport/transport.go

@@ -30,11 +30,14 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
+	"unsafe"
 
 	"golang.org/x/net/http2"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/internal/channelz"
+	"google.golang.org/grpc/internal/envconfig"
+	imem "google.golang.org/grpc/internal/mem"
 	"google.golang.org/grpc/internal/transport/internal"
 	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/mem"
@@ -45,7 +48,30 @@ import (
 	"google.golang.org/grpc/tap"
 )
 
-const logLevel = 2
+const (
+	logLevel = 2
+	// recvMsgSize estimates the memory overhead of a recvMsg in the backlog.
+	// It accounts for the recvMsg struct itself and the slice header of the
+	// underlying buffer's data.
+	recvMsgSize = int(unsafe.Sizeof(recvMsg{}) + unsafe.Sizeof([]byte{}))
+
+	// utilizationFactor controls when we consider memory utilization acceptable.
+	// When backlogHeapSize / payloadSize <= utilizationFactor (meaning at least
+	// 50% of the heap memory is actual payload data), compaction is skipped.
+	utilizationFactor = 2
+)
+
+var (
+	// compactionThreshold is approx 57KB (on 64-bit systems). It allows
+	// accumulating up to 1024 1-byte payloads before triggering compaction.
+	//
+	// Because individual payloads <= 1024 bytes are allocated on the heap
+	// outside mem.BufferPool, waiting for at least 1024 bytes to accumulate
+	// ensures that compaction coalesces those small heap allocations into a
+	// single large buffer from mem.BufferPool, enabling buffer reuse while
+	// avoiding frequent copying for small bursts of frames.
+	compactionThreshold = imem.BufferPoolingThreshold * (recvMsgSize + 1)
+)
 
 func init() {
 	internal.TimeNowFunc = func() int64 { return time.Now().UnixNano() }
@@ -71,23 +97,31 @@ type recvBuffer struct {
 	c       chan recvMsg
 	mu      sync.Mutex
 	backlog []recvMsg
-	err     error
+	// uncompactedSuffixLen tracks the number of consecutive data messages at
+	// the tail of backlog that have not been compacted.
+	uncompactedSuffixLen int
+	// uncompactedBytes tracks the total payload bytes across the trailing
+	// uncompactedSuffixLen messages.
+	uncompactedBytes int
+	err              error
+	bufPool          mem.BufferPool
 }
 
 // init allows a recvBuffer to be initialized in-place, which is useful
 // for resetting a buffer or for avoiding a heap allocation when the buffer
 // is embedded in another struct.
-func (b *recvBuffer) init() {
+func (b *recvBuffer) init(pool mem.BufferPool) {
 	b.c = make(chan recvMsg, 1)
+	b.bufPool = pool
 }
 
 func (b *recvBuffer) put(r recvMsg) {
 	b.mu.Lock()
+	defer b.mu.Unlock()
 	if b.err != nil {
 		// drop the buffer on the floor. Since b.err is not nil, any subsequent reads
 		// will always return an error, making this buffer inaccessible.
 		r.buffer.Free()
-		b.mu.Unlock()
 		// An error had occurred earlier, don't accept more
 		// data or errors.
 		return
@@ -96,13 +130,70 @@ func (b *recvBuffer) put(r recvMsg) {
 	if len(b.backlog) == 0 {
 		select {
 		case b.c <- r:
-			b.mu.Unlock()
 			return
 		default:
 		}
 	}
 	b.backlog = append(b.backlog, r)
-	b.mu.Unlock()
+	b.compactBacklogLocked(r)
+}
+
+func (b *recvBuffer) compactBacklogLocked(r recvMsg) {
+	if !envconfig.EnableReceiveBufferCompaction {
+		return
+	}
+	if r.buffer == nil {
+		b.uncompactedBytes = 0
+		b.uncompactedSuffixLen = 0
+		return
+	}
+
+	b.uncompactedSuffixLen++
+	b.uncompactedBytes += r.buffer.Len()
+	backlogHeapSize := b.uncompactedSuffixLen*recvMsgSize + b.uncompactedBytes
+
+	// If the memory overhead is less than 50% of the heap usage (e.g., because
+	// a large DATA frame arrived), the average message size in the suffix is
+	// large enough that memory bloat is not a concern. Reset suffix tracking.
+	if backlogHeapSize <= utilizationFactor*b.uncompactedBytes {
+		b.uncompactedBytes = 0
+		b.uncompactedSuffixLen = 0
+		return
+	}
+	// Avoid compacting too frequently for short bursts of small frames.
+	// Wait until we have accumulated at least ~1024 small messages (~57 KB).
+	if backlogHeapSize <= compactionThreshold {
+		// Still can accumulate more payloads.
+		return
+	}
+
+	// Since the memory utilization is less than 50%, the average payload size
+	// of each recvMsg must be less than recvMsgSize (approx 56 bytes).
+	// In the worst case for bytes copied (where the average payload is just
+	// below recvMsgSize), compaction will occur once every:
+	//   compactionThreshold / (recvMsgSize + avg_payload) = ~520 messages,
+	// copying ~29KB of data.
+
+	start := 0
+	newBuf := b.bufPool.Get(b.uncompactedBytes)
+	startIdx := len(b.backlog) - b.uncompactedSuffixLen
+
+	for i := startIdx; i < len(b.backlog); i++ {
+		m := b.backlog[i]
+		b.backlog[i] = recvMsg{}
+		start += copy((*newBuf)[start:], m.buffer.ReadOnlyData())
+		m.buffer.Free()
+	}
+	b.backlog[startIdx] = recvMsg{
+		buffer: mem.NewBuffer(newBuf, b.bufPool),
+	}
+	b.backlog = b.backlog[:startIdx+1]
+	// After compaction, the suffix is replaced with a single message containing
+	// the combined payload. The new utilization is close to 1.0 (overhead of
+	// one recvMsg relative to the large compacted payload), which is well
+	// below the utilization factor of 2.
+	b.uncompactedBytes = 0
+	b.uncompactedSuffixLen = 0
 }
 
 func (b *recvBuffer) load() {
@@ -110,6 +201,13 @@ func (b *recvBuffer) load() {
 	if len(b.backlog) > 0 {
 		select {
 		case b.c <- b.backlog[0]:
+			// backlog[0] is only part of the tracked uncompacted suffix if the
+			// entire backlog currently consists of the suffix. If an earlier
+			// compaction or reset occurred, backlog[0] is already compacted.
+			if envconfig.EnableReceiveBufferCompaction && b.uncompactedSuffixLen == len(b.backlog) {
+				b.uncompactedSuffixLen--
+				b.uncompactedBytes -= b.backlog[0].buffer.Len()
+			}
 			b.backlog[0] = recvMsg{}
 			b.backlog = b.backlog[1:]
 		default:
@@ -594,8 +692,6 @@ type CallHdr struct {
 
 	PreviousAttempts int // value of grpc-previous-rpc-attempts header to set
 
-	DoneFunc func() // called when the stream is finished
-
 	// Authority is used to explicitly override the `:authority` header.
 	//
 	// This value comes from one of two sources:

vendor/google.golang.org/grpc/mem/buffer_pool.go

@@ -59,10 +59,6 @@ func init() {
 	internal.SetDefaultBufferPool = func(pool BufferPool) {
 		defaultBufferPool = pool
 	}
-
-	internal.SetBufferPoolingThresholdForTesting = func(threshold int) {
-		bufferPoolingThreshold = threshold
-	}
 }
 
 // DefaultBufferPool returns the current default buffer pool. It is a BufferPool

vendor/google.golang.org/grpc/mem/buffers.go

@@ -29,6 +29,8 @@ import (
 	"fmt"
 	"sync"
 	"sync/atomic"
+
+	"google.golang.org/grpc/internal/mem"
 )
 
 // A Buffer represents a reference counted piece of data (in bytes) that can be
@@ -63,8 +65,6 @@ type Buffer interface {
 }
 
 var (
-	bufferPoolingThreshold = 1 << 10
-
 	bufferObjectPool = sync.Pool{New: func() any { return new(buffer) }}
 )
 
@@ -72,7 +72,7 @@ var (
 // equal to the threshold for buffer pooling. This is used to determine whether
 // to pool buffers or allocate them directly.
 func IsBelowBufferPoolingThreshold(size int) bool {
-	return size <= bufferPoolingThreshold
+	return size <= mem.BufferPoolingThreshold
 }
 
 type buffer struct {

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

@@ -201,6 +201,15 @@ func endOfClientStream(cc *ClientConn, err error, opts ...CallOption) {
 	}
 }
 
+// clientInterceptor is structurally identical to the ClientInterceptor defined
+// in internal/xds/httpfilter/httpfilter.go. It is defined locally here so that
+// we can type-assert the generic Interceptor field in iresolver.RPCConfig
+// without introducing a dependency on xDS packages.
+type clientInterceptor interface {
+	NewStream(ctx context.Context, ri iresolver.RPCInfo, newStream func(ctx context.Context, opts ...CallOption) (ClientStream, error), opts ...CallOption) (ClientStream, error)
+	Close()
+}
+
 func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) {
 	if channelz.IsOn() {
 		cc.incrCallsStarted()
@@ -244,8 +253,11 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 
 	mc := &emptyMethodConfig
 	var onCommit func()
-	newStream := func(ctx context.Context, done func()) (iresolver.ClientStream, error) {
-		return newClientStreamWithParams(ctx, desc, cc, method, mc, onCommit, done, nameResolutionDelayed, opts...)
+	newStream := func(ctx context.Context, filterOpts ...CallOption) (ClientStream, error) {
+		if filterOpts != nil {
+			opts = combine(opts, filterOpts)
+		}
+		return newClientStreamWithParams(ctx, desc, cc, method, mc, onCommit, nameResolutionDelayed, opts...)
 	}
 
 	rpcInfo := iresolver.RPCInfo{Context: ctx, Method: method}
@@ -270,20 +282,24 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 		if rpcConfig.Interceptor != nil {
 			rpcInfo.Context = nil
 			ns := newStream
-			newStream = func(ctx context.Context, done func()) (iresolver.ClientStream, error) {
-				cs, err := rpcConfig.Interceptor.NewStream(ctx, rpcInfo, done, ns)
-				if err != nil {
-					return nil, toRPCErr(err)
+			if interceptor, ok := rpcConfig.Interceptor.(clientInterceptor); ok {
+				newStream = func(ctx context.Context, filterOpts ...CallOption) (ClientStream, error) {
+					cs, err := interceptor.NewStream(ctx, rpcInfo, ns, filterOpts...)
+					if err != nil {
+						return nil, toRPCErr(err)
+					}
+					return cs, nil
 				}
-				return cs, nil
+			} else {
+				return nil, status.Errorf(codes.Internal, "invalid client interceptor type %T", rpcConfig.Interceptor)
 			}
 		}
 	}
 
-	return newStream(ctx, func() {})
+	return newStream(ctx)
 }
 
-func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, mc *serviceconfig.MethodConfig, onCommit, doneFunc func(), nameResolutionDelayed bool, opts ...CallOption) (_ iresolver.ClientStream, err error) {
+func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, mc *serviceconfig.MethodConfig, onCommit func(), nameResolutionDelayed bool, opts ...CallOption) (_ ClientStream, err error) {
 	callInfo := defaultCallInfo()
 	if mc.WaitForReady != nil {
 		callInfo.failFast = !*mc.WaitForReady
@@ -321,7 +337,6 @@ func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *Client
 		Host:           cc.authority,
 		Method:         method,
 		ContentSubtype: callInfo.contentSubtype,
-		DoneFunc:       doneFunc,
 		Authority:      callInfo.authority,
 	}
 	if allowed := callInfo.acceptedResponseCompressors; len(allowed) > 0 {

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

@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.82.1"
+const Version = "1.83.2"

vendor/modules.txt

@@ -445,7 +445,7 @@ google.golang.org/genproto/googleapis/api/httpbody
 ## explicit; go 1.25.0
 google.golang.org/genproto/googleapis/rpc/errdetails
 google.golang.org/genproto/googleapis/rpc/status
-# google.golang.org/grpc v1.82.1
+# google.golang.org/grpc v1.83.2
 ## explicit; go 1.25.0
 google.golang.org/grpc
 google.golang.org/grpc/attributes