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Update to kube v1.17

Browse Source 
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
This commit is contained in:
Humble Chirammal
2020-01-14 16:08:55 +05:30
committed by mergify[bot]
parent 327fcd1b1b
commit 3af1e26d7c
1710 changed files with 289562 additions and 168638 deletions
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12
vendor/google.golang.org/grpc/internal/transport/controlbuf.go generated vendored
View File

@ -107,8 +107,8 @@ func (*registerStream) isTransportResponseFrame() bool { return false }
type headerFrame struct {
streamID uint32
hf []hpack.HeaderField
endStream bool // Valid on server side.
initStream func(uint32) (bool, error) // Used only on the client side.
endStream bool // Valid on server side.
initStream func(uint32) error // Used only on the client side.
onWrite func()
wq *writeQuota // write quota for the stream created.
cleanup *cleanupStream // Valid on the server side.
@ -637,21 +637,17 @@ func (l *loopyWriter) headerHandler(h *headerFrame) error {
func (l *loopyWriter) originateStream(str *outStream) error {
hdr := str.itl.dequeue().(*headerFrame)
sendPing, err := hdr.initStream(str.id)
if err != nil {
if err := hdr.initStream(str.id); err != nil {
if err == ErrConnClosing {
return err
}
// Other errors(errStreamDrain) need not close transport.
return nil
}
if err = l.writeHeader(str.id, hdr.endStream, hdr.hf, hdr.onWrite); err != nil {
if err := l.writeHeader(str.id, hdr.endStream, hdr.hf, hdr.onWrite); err != nil {
return err
}
l.estdStreams[str.id] = str
if sendPing {
return l.pingHandler(&ping{data: [8]byte{}})
}
return nil
}

8
vendor/google.golang.org/grpc/internal/transport/handler_server.go generated vendored
View File

@ -227,7 +227,9 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
if err == nil { // transport has not been closed
if ht.stats != nil {
ht.stats.HandleRPC(s.Context(), &stats.OutTrailer{})
ht.stats.HandleRPC(s.Context(), &stats.OutTrailer{
Trailer: s.trailer.Copy(),
})
}
}
ht.Close()
@ -289,7 +291,9 @@ func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error {
if err == nil {
if ht.stats != nil {
ht.stats.HandleRPC(s.Context(), &stats.OutHeader{})
ht.stats.HandleRPC(s.Context(), &stats.OutHeader{
Header: md.Copy(),
})
}
}
return err

202
vendor/google.golang.org/grpc/internal/transport/http2_client.go generated vendored
View File

@ -35,6 +35,7 @@ import (
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/internal"
"google.golang.org/grpc/internal/channelz"
"google.golang.org/grpc/internal/syscall"
"google.golang.org/grpc/keepalive"
@ -44,8 +45,14 @@ import (
"google.golang.org/grpc/status"
)
// clientConnectionCounter counts the number of connections a client has
// initiated (equal to the number of http2Clients created). Must be accessed
// atomically.
var clientConnectionCounter uint64
// http2Client implements the ClientTransport interface with HTTP2.
type http2Client struct {
lastRead int64 // Keep this field 64-bit aligned. Accessed atomically.
ctx context.Context
cancel context.CancelFunc
ctxDone <-chan struct{} // Cache the ctx.Done() chan.
@ -62,8 +69,6 @@ type http2Client struct {
// goAway is closed to notify the upper layer (i.e., addrConn.transportMonitor)
// that the server sent GoAway on this transport.
goAway chan struct{}
// awakenKeepalive is used to wake up keepalive when after it has gone dormant.
awakenKeepalive chan struct{}
framer *framer
// controlBuf delivers all the control related tasks (e.g., window
@ -77,9 +82,6 @@ type http2Client struct {
perRPCCreds []credentials.PerRPCCredentials
// Boolean to keep track of reading activity on transport.
// 1 is true and 0 is false.
activity uint32 // Accessed atomically.
kp keepalive.ClientParameters
keepaliveEnabled bool
@ -110,6 +112,16 @@ type http2Client struct {
// goAwayReason records the http2.ErrCode and debug data received with the
// GoAway frame.
goAwayReason GoAwayReason
// A condition variable used to signal when the keepalive goroutine should
// go dormant. The condition for dormancy is based on the number of active
// streams and the `PermitWithoutStream` keepalive client parameter. And
// since the number of active streams is guarded by the above mutex, we use
// the same for this condition variable as well.
kpDormancyCond *sync.Cond
// A boolean to track whether the keepalive goroutine is dormant or not.
// This is checked before attempting to signal the above condition
// variable.
kpDormant bool
// Fields below are for channelz metric collection.
channelzID int64 // channelz unique identification number
@ -119,6 +131,8 @@ type http2Client struct {
onClose func()
bufferPool *bufferPool
connectionID uint64
}
func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error), addr string) (net.Conn, error) {
@ -232,7 +246,6 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr TargetInfo, opts Conne
readerDone: make(chan struct{}),
writerDone: make(chan struct{}),
goAway: make(chan struct{}),
awakenKeepalive: make(chan struct{}, 1),
framer: newFramer(conn, writeBufSize, readBufSize, maxHeaderListSize),
fc: &trInFlow{limit: uint32(icwz)},
scheme: scheme,
@ -264,9 +277,6 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr TargetInfo, opts Conne
updateFlowControl: t.updateFlowControl,
}
}
// Make sure awakenKeepalive can't be written upon.
// keepalive routine will make it writable, if need be.
t.awakenKeepalive <- struct{}{}
if t.statsHandler != nil {
t.ctx = t.statsHandler.TagConn(t.ctx, &stats.ConnTagInfo{
RemoteAddr: t.remoteAddr,
@ -281,6 +291,7 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr TargetInfo, opts Conne
t.channelzID = channelz.RegisterNormalSocket(t, opts.ChannelzParentID, fmt.Sprintf("%s -> %s", t.localAddr, t.remoteAddr))
}
if t.keepaliveEnabled {
t.kpDormancyCond = sync.NewCond(&t.mu)
go t.keepalive()
}
// Start the reader goroutine for incoming message. Each transport has
@ -325,6 +336,8 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr TargetInfo, opts Conne
}
}
t.connectionID = atomic.AddUint64(&clientConnectionCounter, 1)
if err := t.framer.writer.Flush(); err != nil {
return nil, err
}
@ -347,6 +360,7 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr TargetInfo, opts Conne
func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream {
// TODO(zhaoq): Handle uint32 overflow of Stream.id.
s := &Stream{
ct: t,
done: make(chan struct{}),
method: callHdr.Method,
sendCompress: callHdr.SendCompress,
@ -380,23 +394,23 @@ func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream {
}
func (t *http2Client) getPeer() *peer.Peer {
pr := &peer.Peer{
Addr: t.remoteAddr,
return &peer.Peer{
Addr: t.remoteAddr,
AuthInfo: t.authInfo,
}
// Attach Auth info if there is any.
if t.authInfo != nil {
pr.AuthInfo = t.authInfo
}
return pr
}
func (t *http2Client) createHeaderFields(ctx context.Context, callHdr *CallHdr) ([]hpack.HeaderField, error) {
aud := t.createAudience(callHdr)
authData, err := t.getTrAuthData(ctx, aud)
ri := credentials.RequestInfo{
Method: callHdr.Method,
}
ctxWithRequestInfo := internal.NewRequestInfoContext.(func(context.Context, credentials.RequestInfo) context.Context)(ctx, ri)
authData, err := t.getTrAuthData(ctxWithRequestInfo, aud)
if err != nil {
return nil, err
}
callAuthData, err := t.getCallAuthData(ctx, aud, callHdr)
callAuthData, err := t.getCallAuthData(ctxWithRequestInfo, aud, callHdr)
if err != nil {
return nil, err
}
@ -419,6 +433,7 @@ func (t *http2Client) createHeaderFields(ctx context.Context, callHdr *CallHdr)
if callHdr.SendCompress != "" {
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress})
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-accept-encoding", Value: callHdr.SendCompress})
}
if dl, ok := ctx.Deadline(); ok {
// Send out timeout regardless its value. The server can detect timeout context by itself.
@ -564,7 +579,7 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
hdr := &headerFrame{
hf: headerFields,
endStream: false,
initStream: func(id uint32) (bool, error) {
initStream: func(id uint32) error {
t.mu.Lock()
if state := t.state; state != reachable {
t.mu.Unlock()
@ -574,29 +589,19 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
err = ErrConnClosing
}
cleanup(err)
return false, err
return err
}
t.activeStreams[id] = s
if channelz.IsOn() {
atomic.AddInt64(&t.czData.streamsStarted, 1)
atomic.StoreInt64(&t.czData.lastStreamCreatedTime, time.Now().UnixNano())
}
var sendPing bool
// If the number of active streams change from 0 to 1, then check if keepalive
// has gone dormant. If so, wake it up.
if len(t.activeStreams) == 1 && t.keepaliveEnabled {
select {
case t.awakenKeepalive <- struct{}{}:
sendPing = true
// Fill the awakenKeepalive channel again as this channel must be
// kept non-writable except at the point that the keepalive()
// goroutine is waiting either to be awaken or shutdown.
t.awakenKeepalive <- struct{}{}
default:
}
// If the keepalive goroutine has gone dormant, wake it up.
if t.kpDormant {
t.kpDormancyCond.Signal()
}
t.mu.Unlock()
return sendPing, nil
return nil
},
onOrphaned: cleanup,
wq: s.wq,
@ -674,12 +679,14 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
}
}
if t.statsHandler != nil {
header, _, _ := metadata.FromOutgoingContextRaw(ctx)
outHeader := &stats.OutHeader{
Client: true,
FullMethod: callHdr.Method,
RemoteAddr: t.remoteAddr,
LocalAddr: t.localAddr,
Compression: callHdr.SendCompress,
Header: header.Copy(),
}
t.statsHandler.HandleRPC(s.ctx, outHeader)
}
@ -778,6 +785,11 @@ func (t *http2Client) Close() error {
t.state = closing
streams := t.activeStreams
t.activeStreams = nil
if t.kpDormant {
// If the keepalive goroutine is blocked on this condition variable, we
// should unblock it so that the goroutine eventually exits.
t.kpDormancyCond.Signal()
}
t.mu.Unlock()
t.controlBuf.finish()
t.cancel()
@ -853,11 +865,11 @@ func (t *http2Client) Write(s *Stream, hdr []byte, data []byte, opts *Options) e
return t.controlBuf.put(df)
}
func (t *http2Client) getStream(f http2.Frame) (*Stream, bool) {
func (t *http2Client) getStream(f http2.Frame) *Stream {
t.mu.Lock()
defer t.mu.Unlock()
s, ok := t.activeStreams[f.Header().StreamID]
return s, ok
s := t.activeStreams[f.Header().StreamID]
t.mu.Unlock()
return s
}
// adjustWindow sends out extra window update over the initial window size
@ -937,8 +949,8 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
t.controlBuf.put(bdpPing)
}
// Select the right stream to dispatch.
s, ok := t.getStream(f)
if !ok {
s := t.getStream(f)
if s == nil {
return
}
if size > 0 {
@ -969,8 +981,8 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
}
func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) {
s, ok := t.getStream(f)
if !ok {
s := t.getStream(f)
if s == nil {
return
}
if f.ErrCode == http2.ErrCodeRefusedStream {
@ -1147,8 +1159,8 @@ func (t *http2Client) handleWindowUpdate(f *http2.WindowUpdateFrame) {
// operateHeaders takes action on the decoded headers.
func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
s, ok := t.getStream(frame)
if !ok {
s := t.getStream(frame)
if s == nil {
return
}
endStream := frame.StreamEnded()
@ -1177,12 +1189,14 @@ func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
inHeader := &stats.InHeader{
Client: true,
WireLength: int(frame.Header().Length),
Header: s.header.Copy(),
}
t.statsHandler.HandleRPC(s.ctx, inHeader)
} else {
inTrailer := &stats.InTrailer{
Client: true,
WireLength: int(frame.Header().Length),
Trailer: s.trailer.Copy(),
}
t.statsHandler.HandleRPC(s.ctx, inTrailer)
}
@ -1191,6 +1205,7 @@ func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
// If headerChan hasn't been closed yet
if atomic.CompareAndSwapUint32(&s.headerChanClosed, 0, 1) {
s.headerValid = true
if !endStream {
// HEADERS frame block carries a Response-Headers.
isHeader = true
@ -1233,7 +1248,7 @@ func (t *http2Client) reader() {
}
t.conn.SetReadDeadline(time.Time{}) // reset deadline once we get the settings frame (we didn't time out, yay!)
if t.keepaliveEnabled {
atomic.CompareAndSwapUint32(&t.activity, 0, 1)
atomic.StoreInt64(&t.lastRead, time.Now().UnixNano())
}
sf, ok := frame.(*http2.SettingsFrame)
if !ok {
@ -1248,7 +1263,7 @@ func (t *http2Client) reader() {
t.controlBuf.throttle()
frame, err := t.framer.fr.ReadFrame()
if t.keepaliveEnabled {
atomic.CompareAndSwapUint32(&t.activity, 0, 1)
atomic.StoreInt64(&t.lastRead, time.Now().UnixNano())
}
if err != nil {
// Abort an active stream if the http2.Framer returns a
@ -1292,56 +1307,83 @@ func (t *http2Client) reader() {
}
}
func minTime(a, b time.Duration) time.Duration {
if a < b {
return a
}
return b
}
// keepalive running in a separate goroutune makes sure the connection is alive by sending pings.
func (t *http2Client) keepalive() {
p := &ping{data: [8]byte{}}
// True iff a ping has been sent, and no data has been received since then.
outstandingPing := false
// Amount of time remaining before which we should receive an ACK for the
// last sent ping.
timeoutLeft := time.Duration(0)
// Records the last value of t.lastRead before we go block on the timer.
// This is required to check for read activity since then.
prevNano := time.Now().UnixNano()
timer := time.NewTimer(t.kp.Time)
for {
select {
case <-timer.C:
if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
timer.Reset(t.kp.Time)
lastRead := atomic.LoadInt64(&t.lastRead)
if lastRead > prevNano {
// There has been read activity since the last time we were here.
outstandingPing = false
// Next timer should fire at kp.Time seconds from lastRead time.
timer.Reset(time.Duration(lastRead) + t.kp.Time - time.Duration(time.Now().UnixNano()))
prevNano = lastRead
continue
}
// Check if keepalive should go dormant.
if outstandingPing && timeoutLeft <= 0 {
t.Close()
return
}
t.mu.Lock()
if t.state == closing {
// If the transport is closing, we should exit from the
// keepalive goroutine here. If not, we could have a race
// between the call to Signal() from Close() and the call to
// Wait() here, whereby the keepalive goroutine ends up
// blocking on the condition variable which will never be
// signalled again.
t.mu.Unlock()
return
}
if len(t.activeStreams) < 1 && !t.kp.PermitWithoutStream {
// Make awakenKeepalive writable.
<-t.awakenKeepalive
t.mu.Unlock()
select {
case <-t.awakenKeepalive:
// If the control gets here a ping has been sent
// need to reset the timer with keepalive.Timeout.
case <-t.ctx.Done():
return
}
} else {
t.mu.Unlock()
// If a ping was sent out previously (because there were active
// streams at that point) which wasn't acked and its timeout
// hadn't fired, but we got here and are about to go dormant,
// we should make sure that we unconditionally send a ping once
// we awaken.
outstandingPing = false
t.kpDormant = true
t.kpDormancyCond.Wait()
}
t.kpDormant = false
t.mu.Unlock()
// We get here either because we were dormant and a new stream was
// created which unblocked the Wait() call, or because the
// keepalive timer expired. In both cases, we need to send a ping.
if !outstandingPing {
if channelz.IsOn() {
atomic.AddInt64(&t.czData.kpCount, 1)
}
// Send ping.
t.controlBuf.put(p)
timeoutLeft = t.kp.Timeout
outstandingPing = true
}
// By the time control gets here a ping has been sent one way or the other.
timer.Reset(t.kp.Timeout)
select {
case <-timer.C:
if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
timer.Reset(t.kp.Time)
continue
}
infof("transport: closing client transport due to idleness.")
t.Close()
return
case <-t.ctx.Done():
if !timer.Stop() {
<-timer.C
}
return
}
// The amount of time to sleep here is the minimum of kp.Time and
// timeoutLeft. This will ensure that we wait only for kp.Time
// before sending out the next ping (for cases where the ping is
// acked).
sleepDuration := minTime(t.kp.Time, timeoutLeft)
timeoutLeft -= sleepDuration
timer.Reset(sleepDuration)
case <-t.ctx.Done():
if !timer.Stop() {
<-timer.C

152
vendor/google.golang.org/grpc/internal/transport/http2_server.go generated vendored
View File

@ -62,11 +62,15 @@ var (
statusRawProto = internal.StatusRawProto.(func(*status.Status) *spb.Status)
)
// serverConnectionCounter counts the number of connections a server has seen
// (equal to the number of http2Servers created). Must be accessed atomically.
var serverConnectionCounter uint64
// http2Server implements the ServerTransport interface with HTTP2.
type http2Server struct {
lastRead int64 // Keep this field 64-bit aligned. Accessed atomically.
ctx context.Context
ctxDone <-chan struct{} // Cache the context.Done() chan
cancel context.CancelFunc
done chan struct{}
conn net.Conn
loopy *loopyWriter
readerDone chan struct{} // sync point to enable testing.
@ -84,12 +88,8 @@ type http2Server struct {
controlBuf *controlBuffer
fc *trInFlow
stats stats.Handler
// Flag to keep track of reading activity on transport.
// 1 is true and 0 is false.
activity uint32 // Accessed atomically.
// Keepalive and max-age parameters for the server.
kp keepalive.ServerParameters
// Keepalive enforcement policy.
kep keepalive.EnforcementPolicy
// The time instance last ping was received.
@ -125,6 +125,8 @@ type http2Server struct {
channelzID int64 // channelz unique identification number
czData *channelzData
bufferPool *bufferPool
connectionID uint64
}
// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is
@ -175,6 +177,12 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
Val: *config.MaxHeaderListSize,
})
}
if config.HeaderTableSize != nil {
isettings = append(isettings, http2.Setting{
ID: http2.SettingHeaderTableSize,
Val: *config.HeaderTableSize,
})
}
if err := framer.fr.WriteSettings(isettings...); err != nil {
return nil, connectionErrorf(false, err, "transport: %v", err)
}
@ -206,11 +214,10 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
if kep.MinTime == 0 {
kep.MinTime = defaultKeepalivePolicyMinTime
}
ctx, cancel := context.WithCancel(context.Background())
done := make(chan struct{})
t := &http2Server{
ctx: ctx,
cancel: cancel,
ctxDone: ctx.Done(),
ctx: context.Background(),
done: done,
conn: conn,
remoteAddr: conn.RemoteAddr(),
localAddr: conn.LocalAddr(),
@ -231,7 +238,7 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
czData: new(channelzData),
bufferPool: newBufferPool(),
}
t.controlBuf = newControlBuffer(t.ctxDone)
t.controlBuf = newControlBuffer(t.done)
if dynamicWindow {
t.bdpEst = &bdpEstimator{
bdp: initialWindowSize,
@ -249,6 +256,9 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
if channelz.IsOn() {
t.channelzID = channelz.RegisterNormalSocket(t, config.ChannelzParentID, fmt.Sprintf("%s -> %s", t.remoteAddr, t.localAddr))
}
t.connectionID = atomic.AddUint64(&serverConnectionCounter, 1)
t.framer.writer.Flush()
defer func() {
@ -273,7 +283,7 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
if err != nil {
return nil, connectionErrorf(false, err, "transport: http2Server.HandleStreams failed to read initial settings frame: %v", err)
}
atomic.StoreUint32(&t.activity, 1)
atomic.StoreInt64(&t.lastRead, time.Now().UnixNano())
sf, ok := frame.(*http2.SettingsFrame)
if !ok {
return nil, connectionErrorf(false, nil, "transport: http2Server.HandleStreams saw invalid preface type %T from client", frame)
@ -362,12 +372,14 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
rstCode: http2.ErrCodeRefusedStream,
onWrite: func() {},
})
s.cancel()
return false
}
}
t.mu.Lock()
if t.state != reachable {
t.mu.Unlock()
s.cancel()
return false
}
if uint32(len(t.activeStreams)) >= t.maxStreams {
@ -378,12 +390,14 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
rstCode: http2.ErrCodeRefusedStream,
onWrite: func() {},
})
s.cancel()
return false
}
if streamID%2 != 1 || streamID <= t.maxStreamID {
t.mu.Unlock()
// illegal gRPC stream id.
errorf("transport: http2Server.HandleStreams received an illegal stream id: %v", streamID)
s.cancel()
return true
}
t.maxStreamID = streamID
@ -408,6 +422,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
LocalAddr: t.localAddr,
Compression: s.recvCompress,
WireLength: int(frame.Header().Length),
Header: metadata.MD(state.data.mdata).Copy(),
}
t.stats.HandleRPC(s.ctx, inHeader)
}
@ -441,7 +456,7 @@ func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.
for {
t.controlBuf.throttle()
frame, err := t.framer.fr.ReadFrame()
atomic.StoreUint32(&t.activity, 1)
atomic.StoreInt64(&t.lastRead, time.Now().UnixNano())
if err != nil {
if se, ok := err.(http2.StreamError); ok {
warningf("transport: http2Server.HandleStreams encountered http2.StreamError: %v", se)
@ -749,7 +764,7 @@ func (t *http2Server) checkForHeaderListSize(it interface{}) bool {
return true
}
// WriteHeader sends the header metedata md back to the client.
// WriteHeader sends the header metadata md back to the client.
func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
if s.updateHeaderSent() || s.getState() == streamDone {
return ErrIllegalHeaderWrite
@ -800,7 +815,9 @@ func (t *http2Server) writeHeaderLocked(s *Stream) error {
if t.stats != nil {
// Note: WireLength is not set in outHeader.
// TODO(mmukhi): Revisit this later, if needed.
outHeader := &stats.OutHeader{}
outHeader := &stats.OutHeader{
Header: s.header.Copy(),
}
t.stats.HandleRPC(s.Context(), outHeader)
}
return nil
@ -863,7 +880,9 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
rst := s.getState() == streamActive
t.finishStream(s, rst, http2.ErrCodeNo, trailingHeader, true)
if t.stats != nil {
t.stats.HandleRPC(s.Context(), &stats.OutTrailer{})
t.stats.HandleRPC(s.Context(), &stats.OutTrailer{
Trailer: s.trailer.Copy(),
})
}
return nil
}
@ -885,7 +904,7 @@ func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) e
// TODO(mmukhi, dfawley): Should the server write also return io.EOF?
s.cancel()
select {
case <-t.ctx.Done():
case <-t.done:
return ErrConnClosing
default:
}
@ -907,7 +926,7 @@ func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) e
}
if err := s.wq.get(int32(len(hdr) + len(data))); err != nil {
select {
case <-t.ctx.Done():
case <-t.done:
return ErrConnClosing
default:
}
@ -924,32 +943,35 @@ func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) e
// after an additional duration of keepalive.Timeout.
func (t *http2Server) keepalive() {
p := &ping{}
var pingSent bool
maxIdle := time.NewTimer(t.kp.MaxConnectionIdle)
maxAge := time.NewTimer(t.kp.MaxConnectionAge)
keepalive := time.NewTimer(t.kp.Time)
// NOTE: All exit paths of this function should reset their
// respective timers. A failure to do so will cause the
// following clean-up to deadlock and eventually leak.
// True iff a ping has been sent, and no data has been received since then.
outstandingPing := false
// Amount of time remaining before which we should receive an ACK for the
// last sent ping.
kpTimeoutLeft := time.Duration(0)
// Records the last value of t.lastRead before we go block on the timer.
// This is required to check for read activity since then.
prevNano := time.Now().UnixNano()
// Initialize the different timers to their default values.
idleTimer := time.NewTimer(t.kp.MaxConnectionIdle)
ageTimer := time.NewTimer(t.kp.MaxConnectionAge)
kpTimer := time.NewTimer(t.kp.Time)
defer func() {
if !maxIdle.Stop() {
<-maxIdle.C
}
if !maxAge.Stop() {
<-maxAge.C
}
if !keepalive.Stop() {
<-keepalive.C
}
// We need to drain the underlying channel in these timers after a call
// to Stop(), only if we are interested in resetting them. Clearly we
// are not interested in resetting them here.
idleTimer.Stop()
ageTimer.Stop()
kpTimer.Stop()
}()
for {
select {
case <-maxIdle.C:
case <-idleTimer.C:
t.mu.Lock()
idle := t.idle
if idle.IsZero() { // The connection is non-idle.
t.mu.Unlock()
maxIdle.Reset(t.kp.MaxConnectionIdle)
idleTimer.Reset(t.kp.MaxConnectionIdle)
continue
}
val := t.kp.MaxConnectionIdle - time.Since(idle)
@ -958,44 +980,52 @@ func (t *http2Server) keepalive() {
// The connection has been idle for a duration of keepalive.MaxConnectionIdle or more.
// Gracefully close the connection.
t.drain(http2.ErrCodeNo, []byte{})
// Resetting the timer so that the clean-up doesn't deadlock.
maxIdle.Reset(infinity)
return
}
maxIdle.Reset(val)
case <-maxAge.C:
idleTimer.Reset(val)
case <-ageTimer.C:
t.drain(http2.ErrCodeNo, []byte{})
maxAge.Reset(t.kp.MaxConnectionAgeGrace)
ageTimer.Reset(t.kp.MaxConnectionAgeGrace)
select {
case <-maxAge.C:
case <-ageTimer.C:
// Close the connection after grace period.
infof("transport: closing server transport due to maximum connection age.")
t.Close()
// Resetting the timer so that the clean-up doesn't deadlock.
maxAge.Reset(infinity)
case <-t.ctx.Done():
case <-t.done:
}
return
case <-keepalive.C:
if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
pingSent = false
keepalive.Reset(t.kp.Time)
case <-kpTimer.C:
lastRead := atomic.LoadInt64(&t.lastRead)
if lastRead > prevNano {
// There has been read activity since the last time we were
// here. Setup the timer to fire at kp.Time seconds from
// lastRead time and continue.
outstandingPing = false
kpTimer.Reset(time.Duration(lastRead) + t.kp.Time - time.Duration(time.Now().UnixNano()))
prevNano = lastRead
continue
}
if pingSent {
if outstandingPing && kpTimeoutLeft <= 0 {
infof("transport: closing server transport due to idleness.")
t.Close()
// Resetting the timer so that the clean-up doesn't deadlock.
keepalive.Reset(infinity)
return
}
pingSent = true
if channelz.IsOn() {
atomic.AddInt64(&t.czData.kpCount, 1)
if !outstandingPing {
if channelz.IsOn() {
atomic.AddInt64(&t.czData.kpCount, 1)
}
t.controlBuf.put(p)
kpTimeoutLeft = t.kp.Timeout
outstandingPing = true
}
t.controlBuf.put(p)
keepalive.Reset(t.kp.Timeout)
case <-t.ctx.Done():
// The amount of time to sleep here is the minimum of kp.Time and
// timeoutLeft. This will ensure that we wait only for kp.Time
// before sending out the next ping (for cases where the ping is
// acked).
sleepDuration := minTime(t.kp.Time, kpTimeoutLeft)
kpTimeoutLeft -= sleepDuration
kpTimer.Reset(sleepDuration)
case <-t.done:
return
}
}
@ -1015,7 +1045,7 @@ func (t *http2Server) Close() error {
t.activeStreams = nil
t.mu.Unlock()
t.controlBuf.finish()
t.cancel()
close(t.done)
err := t.conn.Close()
if channelz.IsOn() {
channelz.RemoveEntry(t.channelzID)
@ -1155,7 +1185,7 @@ func (t *http2Server) outgoingGoAwayHandler(g *goAway) (bool, error) {
select {
case <-t.drainChan:
case <-timer.C:
case <-t.ctx.Done():
case <-t.done:
return
}
t.controlBuf.put(&goAway{code: g.code, debugData: g.debugData})
@ -1205,7 +1235,7 @@ func (t *http2Server) getOutFlowWindow() int64 {
select {
case sz := <-resp:
return int64(sz)
case <-t.ctxDone:
case <-t.done:
return -1
case <-timer.C:
return -2

70
vendor/google.golang.org/grpc/internal/transport/transport.go generated vendored
View File

@ -73,10 +73,11 @@ type recvMsg struct {
}
// recvBuffer is an unbounded channel of recvMsg structs.
// Note recvBuffer differs from controlBuffer only in that recvBuffer
// holds a channel of only recvMsg structs instead of objects implementing "item" interface.
// recvBuffer is written to much more often than
// controlBuffer and using strict recvMsg structs helps avoid allocation in "recvBuffer.put"
//
// Note: recvBuffer differs from buffer.Unbounded only in the fact that it
// holds a channel of recvMsg structs instead of objects implementing "item"
// interface. recvBuffer is written to much more often and using strict recvMsg
// structs helps avoid allocation in "recvBuffer.put"
type recvBuffer struct {
c chan recvMsg
mu sync.Mutex
@ -233,6 +234,7 @@ const (
type Stream struct {
id uint32
st ServerTransport // nil for client side Stream
ct *http2Client // nil for server side Stream
ctx context.Context // the associated context of the stream
cancel context.CancelFunc // always nil for client side Stream
done chan struct{} // closed at the end of stream to unblock writers. On the client side.
@ -251,6 +253,10 @@ type Stream struct {
headerChan chan struct{} // closed to indicate the end of header metadata.
headerChanClosed uint32 // set when headerChan is closed. Used to avoid closing headerChan multiple times.
// headerValid indicates whether a valid header was received. Only
// meaningful after headerChan is closed (always call waitOnHeader() before
// reading its value). Not valid on server side.
headerValid bool
// hdrMu protects header and trailer metadata on the server-side.
hdrMu sync.Mutex
@ -303,34 +309,28 @@ func (s *Stream) getState() streamState {
return streamState(atomic.LoadUint32((*uint32)(&s.state)))
}
func (s *Stream) waitOnHeader() error {
func (s *Stream) waitOnHeader() {
if s.headerChan == nil {
// On the server headerChan is always nil since a stream originates
// only after having received headers.
return nil
return
}
select {
case <-s.ctx.Done():
// We prefer success over failure when reading messages because we delay
// context error in stream.Read(). To keep behavior consistent, we also
// prefer success here.
select {
case <-s.headerChan:
return nil
default:
}
return ContextErr(s.ctx.Err())
// Close the stream to prevent headers/trailers from changing after
// this function returns.
s.ct.CloseStream(s, ContextErr(s.ctx.Err()))
// headerChan could possibly not be closed yet if closeStream raced
// with operateHeaders; wait until it is closed explicitly here.
<-s.headerChan
case <-s.headerChan:
return nil
}
}
// RecvCompress returns the compression algorithm applied to the inbound
// message. It is empty string if there is no compression applied.
func (s *Stream) RecvCompress() string {
if err := s.waitOnHeader(); err != nil {
return ""
}
s.waitOnHeader()
return s.recvCompress
}
@ -351,36 +351,27 @@ func (s *Stream) Done() <-chan struct{} {
// available. It blocks until i) the metadata is ready or ii) there is no header
// metadata or iii) the stream is canceled/expired.
//
// On server side, it returns the out header after t.WriteHeader is called.
// On server side, it returns the out header after t.WriteHeader is called. It
// does not block and must not be called until after WriteHeader.
func (s *Stream) Header() (metadata.MD, error) {
if s.headerChan == nil && s.header != nil {
if s.headerChan == nil {
// On server side, return the header in stream. It will be the out
// header after t.WriteHeader is called.
return s.header.Copy(), nil
}
err := s.waitOnHeader()
// Even if the stream is closed, header is returned if available.
select {
case <-s.headerChan:
if s.header == nil {
return nil, nil
}
return s.header.Copy(), nil
default:
s.waitOnHeader()
if !s.headerValid {
return nil, s.status.Err()
}
return nil, err
return s.header.Copy(), nil
}
// TrailersOnly blocks until a header or trailers-only frame is received and
// then returns true if the stream was trailers-only. If the stream ends
// before headers are received, returns true, nil. If a context error happens
// first, returns it as a status error. Client-side only.
func (s *Stream) TrailersOnly() (bool, error) {
err := s.waitOnHeader()
if err != nil {
return false, err
}
return s.noHeaders, nil
// before headers are received, returns true, nil. Client-side only.
func (s *Stream) TrailersOnly() bool {
s.waitOnHeader()
return s.noHeaders
}
// Trailer returns the cached trailer metedata. Note that if it is not called
@ -534,6 +525,7 @@ type ServerConfig struct {
ReadBufferSize int
ChannelzParentID int64
MaxHeaderListSize *uint32
HeaderTableSize *uint32
}
// NewServerTransport creates a ServerTransport with conn or non-nil error