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Merge pull request #8840 from gyuho/health-balancer

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*: refactor clientv3 balancer, upgrade gRPC to v1.7.2
This commit is contained in:
Gyu-Ho Lee 2017-11-10 15:41:00 -08:00 committed by GitHub
commit b64c1bfce6
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37 changed files with 3101 additions and 2261 deletions
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439
clientv3/balancer.go
View File

@ -1,439 +0,0 @@
// Copyright 2016 The etcd 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 clientv3
import (
"context"
"net/url"
"strings"
"sync"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// ErrNoAddrAvilable is returned by Get() when the balancer does not have
// any active connection to endpoints at the time.
// This error is returned only when opts.BlockingWait is true.
var ErrNoAddrAvilable = status.Error(codes.Unavailable, "there is no address available")
type notifyMsg int
const (
notifyReset notifyMsg = iota
notifyNext
)
// simpleBalancer does the bare minimum to expose multiple eps
// to the grpc reconnection code path
type simpleBalancer struct {
// addrs are the client's endpoint addresses for grpc
addrs []grpc.Address
// eps holds the raw endpoints from the client
eps []string
// notifyCh notifies grpc of the set of addresses for connecting
notifyCh chan []grpc.Address
// readyc closes once the first connection is up
readyc chan struct{}
readyOnce sync.Once
// mu protects all fields below.
mu sync.RWMutex
// upc closes when pinAddr transitions from empty to non-empty or the balancer closes.
upc chan struct{}
// downc closes when grpc calls down() on pinAddr
downc chan struct{}
// stopc is closed to signal updateNotifyLoop should stop.
stopc chan struct{}
// donec closes when all goroutines are exited
donec chan struct{}
// updateAddrsC notifies updateNotifyLoop to update addrs.
updateAddrsC chan notifyMsg
// grpc issues TLS cert checks using the string passed into dial so
// that string must be the host. To recover the full scheme://host URL,
// have a map from hosts to the original endpoint.
hostPort2ep map[string]string
// pinAddr is the currently pinned address; set to the empty string on
// initialization and shutdown.
pinAddr string
closed bool
}
func newSimpleBalancer(eps []string) *simpleBalancer {
notifyCh := make(chan []grpc.Address)
addrs := eps2addrs(eps)
sb := &simpleBalancer{
addrs: addrs,
eps: eps,
notifyCh: notifyCh,
readyc: make(chan struct{}),
upc: make(chan struct{}),
stopc: make(chan struct{}),
downc: make(chan struct{}),
donec: make(chan struct{}),
updateAddrsC: make(chan notifyMsg),
hostPort2ep: getHostPort2ep(eps),
}
close(sb.downc)
go sb.updateNotifyLoop()
return sb
}
func (b *simpleBalancer) Start(target string, config grpc.BalancerConfig) error { return nil }
func (b *simpleBalancer) ConnectNotify() <-chan struct{} {
b.mu.Lock()
defer b.mu.Unlock()
return b.upc
}
func (b *simpleBalancer) ready() <-chan struct{} { return b.readyc }
func (b *simpleBalancer) endpoint(hostPort string) string {
b.mu.Lock()
defer b.mu.Unlock()
return b.hostPort2ep[hostPort]
}
func (b *simpleBalancer) endpoints() []string {
b.mu.RLock()
defer b.mu.RUnlock()
return b.eps
}
func (b *simpleBalancer) pinned() string {
b.mu.RLock()
defer b.mu.RUnlock()
return b.pinAddr
}
func getHostPort2ep(eps []string) map[string]string {
hm := make(map[string]string, len(eps))
for i := range eps {
_, host, _ := parseEndpoint(eps[i])
hm[host] = eps[i]
}
return hm
}
func (b *simpleBalancer) updateAddrs(eps ...string) {
np := getHostPort2ep(eps)
b.mu.Lock()
match := len(np) == len(b.hostPort2ep)
for k, v := range np {
if b.hostPort2ep[k] != v {
match = false
break
}
}
if match {
// same endpoints, so no need to update address
b.mu.Unlock()
return
}
b.hostPort2ep = np
b.addrs, b.eps = eps2addrs(eps), eps
// updating notifyCh can trigger new connections,
// only update addrs if all connections are down
// or addrs does not include pinAddr.
update := !hasAddr(b.addrs, b.pinAddr)
b.mu.Unlock()
if update {
select {
case b.updateAddrsC <- notifyNext:
case <-b.stopc:
}
}
}
func (b *simpleBalancer) next() {
b.mu.RLock()
downc := b.downc
b.mu.RUnlock()
select {
case b.updateAddrsC <- notifyNext:
case <-b.stopc:
}
// wait until disconnect so new RPCs are not issued on old connection
select {
case <-downc:
case <-b.stopc:
}
}
func hasAddr(addrs []grpc.Address, targetAddr string) bool {
for _, addr := range addrs {
if targetAddr == addr.Addr {
return true
}
}
return false
}
func (b *simpleBalancer) updateNotifyLoop() {
defer close(b.donec)
for {
b.mu.RLock()
upc, downc, addr := b.upc, b.downc, b.pinAddr
b.mu.RUnlock()
// downc or upc should be closed
select {
case <-downc:
downc = nil
default:
}
select {
case <-upc:
upc = nil
default:
}
switch {
case downc == nil && upc == nil:
// stale
select {
case <-b.stopc:
return
default:
}
case downc == nil:
b.notifyAddrs(notifyReset)
select {
case <-upc:
case msg := <-b.updateAddrsC:
b.notifyAddrs(msg)
case <-b.stopc:
return
}
case upc == nil:
select {
// close connections that are not the pinned address
case b.notifyCh <- []grpc.Address{{Addr: addr}}:
case <-downc:
case <-b.stopc:
return
}
select {
case <-downc:
b.notifyAddrs(notifyReset)
case msg := <-b.updateAddrsC:
b.notifyAddrs(msg)
case <-b.stopc:
return
}
}
}
}
func (b *simpleBalancer) notifyAddrs(msg notifyMsg) {
if msg == notifyNext {
select {
case b.notifyCh <- []grpc.Address{}:
case <-b.stopc:
return
}
}
b.mu.RLock()
addrs := b.addrs
pinAddr := b.pinAddr
downc := b.downc
b.mu.RUnlock()
var waitDown bool
if pinAddr != "" {
waitDown = true
for _, a := range addrs {
if a.Addr == pinAddr {
waitDown = false
}
}
}
select {
case b.notifyCh <- addrs:
if waitDown {
select {
case <-downc:
case <-b.stopc:
}
}
case <-b.stopc:
}
}
func (b *simpleBalancer) Up(addr grpc.Address) func(error) {
f, _ := b.up(addr)
return f
}
func (b *simpleBalancer) up(addr grpc.Address) (func(error), bool) {
b.mu.Lock()
defer b.mu.Unlock()
// gRPC might call Up after it called Close. We add this check
// to "fix" it up at application layer. Otherwise, will panic
// if b.upc is already closed.
if b.closed {
return func(err error) {}, false
}
// gRPC might call Up on a stale address.
// Prevent updating pinAddr with a stale address.
if !hasAddr(b.addrs, addr.Addr) {
return func(err error) {}, false
}
if b.pinAddr != "" {
if logger.V(4) {
logger.Infof("clientv3/balancer: %q is up but not pinned (already pinned %q)", addr.Addr, b.pinAddr)
}
return func(err error) {}, false
}
// notify waiting Get()s and pin first connected address
close(b.upc)
b.downc = make(chan struct{})
b.pinAddr = addr.Addr
if logger.V(4) {
logger.Infof("clientv3/balancer: pin %q", addr.Addr)
}
// notify client that a connection is up
b.readyOnce.Do(func() { close(b.readyc) })
return func(err error) {
b.mu.Lock()
b.upc = make(chan struct{})
close(b.downc)
b.pinAddr = ""
b.mu.Unlock()
if logger.V(4) {
logger.Infof("clientv3/balancer: unpin %q (%q)", addr.Addr, err.Error())
}
}, true
}
func (b *simpleBalancer) Get(ctx context.Context, opts grpc.BalancerGetOptions) (grpc.Address, func(), error) {
var (
addr string
closed bool
)
// If opts.BlockingWait is false (for fail-fast RPCs), it should return
// an address it has notified via Notify immediately instead of blocking.
if !opts.BlockingWait {
b.mu.RLock()
closed = b.closed
addr = b.pinAddr
b.mu.RUnlock()
if closed {
return grpc.Address{Addr: ""}, nil, grpc.ErrClientConnClosing
}
if addr == "" {
return grpc.Address{Addr: ""}, nil, ErrNoAddrAvilable
}
return grpc.Address{Addr: addr}, func() {}, nil
}
for {
b.mu.RLock()
ch := b.upc
b.mu.RUnlock()
select {
case <-ch:
case <-b.donec:
return grpc.Address{Addr: ""}, nil, grpc.ErrClientConnClosing
case <-ctx.Done():
return grpc.Address{Addr: ""}, nil, ctx.Err()
}
b.mu.RLock()
closed = b.closed
addr = b.pinAddr
b.mu.RUnlock()
// Close() which sets b.closed = true can be called before Get(), Get() must exit if balancer is closed.
if closed {
return grpc.Address{Addr: ""}, nil, grpc.ErrClientConnClosing
}
if addr != "" {
break
}
}
return grpc.Address{Addr: addr}, func() {}, nil
}
func (b *simpleBalancer) Notify() <-chan []grpc.Address { return b.notifyCh }
func (b *simpleBalancer) Close() error {
b.mu.Lock()
// In case gRPC calls close twice. TODO: remove the checking
// when we are sure that gRPC wont call close twice.
if b.closed {
b.mu.Unlock()
<-b.donec
return nil
}
b.closed = true
close(b.stopc)
b.pinAddr = ""
// In the case of following scenario:
// 1. upc is not closed; no pinned address
// 2. client issues an RPC, calling invoke(), which calls Get(), enters for loop, blocks
// 3. client.conn.Close() calls balancer.Close(); closed = true
// 4. for loop in Get() never exits since ctx is the context passed in by the client and may not be canceled
// we must close upc so Get() exits from blocking on upc
select {
case <-b.upc:
default:
// terminate all waiting Get()s
close(b.upc)
}
b.mu.Unlock()
// wait for updateNotifyLoop to finish
<-b.donec
close(b.notifyCh)
return nil
}
func getHost(ep string) string {
url, uerr := url.Parse(ep)
if uerr != nil || !strings.Contains(ep, "://") {
return ep
}
return url.Host
}
func eps2addrs(eps []string) []grpc.Address {
addrs := make([]grpc.Address, len(eps))
for i := range eps {
addrs[i].Addr = getHost(eps[i])
}
return addrs
}

19
clientv3/client.go
View File

@ -121,6 +121,19 @@ func (c *Client) SetEndpoints(eps ...string) {
c.cfg.Endpoints = eps
c.mu.Unlock()
c.balancer.updateAddrs(eps...)
// updating notifyCh can trigger new connections,
// need update addrs if all connections are down
// or addrs does not include pinAddr.
c.balancer.mu.RLock()
update := !hasAddr(c.balancer.addrs, c.balancer.pinAddr)
c.balancer.mu.RUnlock()
if update {
select {
case c.balancer.updateAddrsC <- notifyNext:
case <-c.balancer.stopc:
}
}
}
// Sync synchronizes client's endpoints with the known endpoints from the etcd membership.
@ -378,9 +391,9 @@ func newClient(cfg *Config) (*Client, error) {
client.Password = cfg.Password
}
sb := newSimpleBalancer(cfg.Endpoints)
hc := func(ep string) (bool, error) { return grpcHealthCheck(client, ep) }
client.balancer = newHealthBalancer(sb, cfg.DialTimeout, hc)
client.balancer = newHealthBalancer(cfg.Endpoints, cfg.DialTimeout, func(ep string) (bool, error) {
return grpcHealthCheck(client, ep)
})
// use Endpoints[0] so that for https:// without any tls config given, then
// grpc will assume the certificate server name is the endpoint host.

612
clientv3/health_balancer.go
View File

@ -16,6 +16,9 @@ package clientv3
import (
"context"
"errors"
"net/url"
"strings"
"sync"
"time"
@ -25,207 +28,549 @@ import (
"google.golang.org/grpc/status"
)
const minHealthRetryDuration = 3 * time.Second
const unknownService = "unknown service grpc.health.v1.Health"
const (
minHealthRetryDuration = 3 * time.Second
unknownService = "unknown service grpc.health.v1.Health"
)
// ErrNoAddrAvilable is returned by Get() when the balancer does not have
// any active connection to endpoints at the time.
// This error is returned only when opts.BlockingWait is true.
var ErrNoAddrAvilable = status.Error(codes.Unavailable, "there is no address available")
type healthCheckFunc func(ep string) (bool, error)
// healthBalancer wraps a balancer so that it uses health checking
// to choose its endpoints.
type notifyMsg int
const (
notifyReset notifyMsg = iota
notifyNext
)
// healthBalancer does the bare minimum to expose multiple eps
// to the grpc reconnection code path
type healthBalancer struct {
*simpleBalancer
// addrs are the client's endpoint addresses for grpc
addrs []grpc.Address
// eps holds the raw endpoints from the client
eps []string
// notifyCh notifies grpc of the set of addresses for connecting
notifyCh chan []grpc.Address
// readyc closes once the first connection is up
readyc chan struct{}
readyOnce sync.Once
// healthCheck checks an endpoint's health.
healthCheck healthCheckFunc
healthCheckTimeout time.Duration
// mu protects addrs, eps, unhealthy map, and stopc.
unhealthyMu sync.RWMutex
unhealthyHostPorts map[string]time.Time
// mu protects all fields below.
mu sync.RWMutex
// addrs stores all grpc addresses associated with the balancer.
addrs []grpc.Address
// upc closes when pinAddr transitions from empty to non-empty or the balancer closes.
upc chan struct{}
// eps stores all client endpoints
eps []string
// unhealthy tracks the last unhealthy time of endpoints.
unhealthy map[string]time.Time
// downc closes when grpc calls down() on pinAddr
downc chan struct{}
// stopc is closed to signal updateNotifyLoop should stop.
stopc chan struct{}
stopOnce sync.Once
wg sync.WaitGroup
// donec closes when all goroutines are exited
donec chan struct{}
// updateAddrsC notifies updateNotifyLoop to update addrs.
updateAddrsC chan notifyMsg
// grpc issues TLS cert checks using the string passed into dial so
// that string must be the host. To recover the full scheme://host URL,
// have a map from hosts to the original endpoint.
hostPort2ep map[string]string
wg sync.WaitGroup
// pinAddr is the currently pinned address; set to the empty string on
// initialization and shutdown.
pinAddr string
closed bool
}
func newHealthBalancer(b *simpleBalancer, timeout time.Duration, hc healthCheckFunc) *healthBalancer {
func newHealthBalancer(eps []string, timeout time.Duration, hc healthCheckFunc) *healthBalancer {
notifyCh := make(chan []grpc.Address)
addrs := eps2addrs(eps)
hb := &healthBalancer{
simpleBalancer: b,
healthCheck: hc,
eps: b.endpoints(),
addrs: eps2addrs(b.endpoints()),
hostPort2ep: getHostPort2ep(b.endpoints()),
unhealthy: make(map[string]time.Time),
stopc: make(chan struct{}),
addrs: addrs,
eps: eps,
notifyCh: notifyCh,
readyc: make(chan struct{}),
healthCheck: hc,
unhealthyHostPorts: make(map[string]time.Time),
upc: make(chan struct{}),
stopc: make(chan struct{}),
downc: make(chan struct{}),
donec: make(chan struct{}),
updateAddrsC: make(chan notifyMsg),
hostPort2ep: getHostPort2ep(eps),
}
if timeout < minHealthRetryDuration {
timeout = minHealthRetryDuration
}
hb.healthCheckTimeout = timeout
close(hb.downc)
go hb.updateNotifyLoop()
hb.wg.Add(1)
go func() {
defer hb.wg.Done()
hb.updateUnhealthy(timeout)
hb.updateUnhealthy()
}()
return hb
}
func (hb *healthBalancer) Up(addr grpc.Address) func(error) {
f, used := hb.up(addr)
if !used {
return f
func (b *healthBalancer) Start(target string, config grpc.BalancerConfig) error { return nil }
func (b *healthBalancer) ConnectNotify() <-chan struct{} {
b.mu.Lock()
defer b.mu.Unlock()
return b.upc
}
func (b *healthBalancer) ready() <-chan struct{} { return b.readyc }
func (b *healthBalancer) endpoint(hostPort string) string {
b.mu.RLock()
defer b.mu.RUnlock()
return b.hostPort2ep[hostPort]
}
func (b *healthBalancer) pinned() string {
b.mu.RLock()
defer b.mu.RUnlock()
return b.pinAddr
}
func (b *healthBalancer) hostPortError(hostPort string, err error) {
if b.endpoint(hostPort) == "" {
if logger.V(4) {
logger.Infof("clientv3/balancer: %q is stale (skip marking as unhealthy on %q)", hostPort, err.Error())
}
return
}
return func(err error) {
// If connected to a black hole endpoint or a killed server, the gRPC ping
// timeout will induce a network I/O error, and retrying until success;
// finding healthy endpoint on retry could take several timeouts and redials.
// To avoid wasting retries, gray-list unhealthy endpoints.
hb.hostPortError(addr.Addr, err)
f(err)
b.unhealthyMu.Lock()
b.unhealthyHostPorts[hostPort] = time.Now()
b.unhealthyMu.Unlock()
if logger.V(4) {
logger.Infof("clientv3/balancer: %q is marked unhealthy (%q)", hostPort, err.Error())
}
}
func (hb *healthBalancer) up(addr grpc.Address) (func(error), bool) {
if !hb.mayPin(addr) {
return func(err error) {}, false
func (b *healthBalancer) removeUnhealthy(hostPort, msg string) {
if b.endpoint(hostPort) == "" {
if logger.V(4) {
logger.Infof("clientv3/balancer: %q was not in unhealthy (%q)", hostPort, msg)
}
return
}
b.unhealthyMu.Lock()
delete(b.unhealthyHostPorts, hostPort)
b.unhealthyMu.Unlock()
if logger.V(4) {
logger.Infof("clientv3/balancer: %q is removed from unhealthy (%q)", hostPort, msg)
}
return hb.simpleBalancer.up(addr)
}
func (hb *healthBalancer) Close() error {
hb.stopOnce.Do(func() { close(hb.stopc) })
hb.wg.Wait()
return hb.simpleBalancer.Close()
func (b *healthBalancer) countUnhealthy() (count int) {
b.unhealthyMu.RLock()
count = len(b.unhealthyHostPorts)
b.unhealthyMu.RUnlock()
return count
}
func (hb *healthBalancer) updateAddrs(eps ...string) {
addrs, hostPort2ep := eps2addrs(eps), getHostPort2ep(eps)
hb.mu.Lock()
hb.addrs, hb.eps, hb.hostPort2ep = addrs, eps, hostPort2ep
hb.unhealthy = make(map[string]time.Time)
hb.mu.Unlock()
hb.simpleBalancer.updateAddrs(eps...)
func (b *healthBalancer) isUnhealthy(hostPort string) (unhealthy bool) {
b.unhealthyMu.RLock()
_, unhealthy = b.unhealthyHostPorts[hostPort]
b.unhealthyMu.RUnlock()
return unhealthy
}
func (hb *healthBalancer) endpoint(host string) string {
hb.mu.RLock()
defer hb.mu.RUnlock()
return hb.hostPort2ep[host]
func (b *healthBalancer) cleanupUnhealthy() {
b.unhealthyMu.Lock()
for k, v := range b.unhealthyHostPorts {
if time.Since(v) > b.healthCheckTimeout {
delete(b.unhealthyHostPorts, k)
if logger.V(4) {
logger.Infof("clientv3/balancer: removed %q from unhealthy after %v", k, b.healthCheckTimeout)
}
}
}
b.unhealthyMu.Unlock()
}
func (hb *healthBalancer) endpoints() []string {
hb.mu.RLock()
defer hb.mu.RUnlock()
return hb.eps
func (b *healthBalancer) liveAddrs() ([]grpc.Address, map[string]struct{}) {
unhealthyCnt := b.countUnhealthy()
b.mu.RLock()
defer b.mu.RUnlock()
hbAddrs := b.addrs
if len(b.addrs) == 1 || unhealthyCnt == 0 || unhealthyCnt == len(b.addrs) {
liveHostPorts := make(map[string]struct{}, len(b.hostPort2ep))
for k := range b.hostPort2ep {
liveHostPorts[k] = struct{}{}
}
return hbAddrs, liveHostPorts
}
addrs := make([]grpc.Address, 0, len(b.addrs)-unhealthyCnt)
liveHostPorts := make(map[string]struct{}, len(addrs))
for _, addr := range b.addrs {
if !b.isUnhealthy(addr.Addr) {
addrs = append(addrs, addr)
liveHostPorts[addr.Addr] = struct{}{}
}
}
return addrs, liveHostPorts
}
func (hb *healthBalancer) updateUnhealthy(timeout time.Duration) {
func (b *healthBalancer) updateUnhealthy() {
for {
select {
case <-time.After(timeout):
hb.mu.Lock()
for k, v := range hb.unhealthy {
if time.Since(v) > timeout {
delete(hb.unhealthy, k)
if logger.V(4) {
logger.Infof("clientv3/health-balancer: removes %q from unhealthy after %v", k, timeout)
}
case <-time.After(b.healthCheckTimeout):
b.cleanupUnhealthy()
pinned := b.pinned()
if pinned == "" || b.isUnhealthy(pinned) {
select {
case b.updateAddrsC <- notifyNext:
case <-b.stopc:
return
}
}
hb.mu.Unlock()
eps := []string{}
for _, addr := range hb.liveAddrs() {
eps = append(eps, hb.endpoint(addr.Addr))
}
hb.simpleBalancer.updateAddrs(eps...)
case <-hb.stopc:
case <-b.stopc:
return
}
}
}
func (hb *healthBalancer) liveAddrs() []grpc.Address {
hb.mu.RLock()
defer hb.mu.RUnlock()
hbAddrs := hb.addrs
if len(hb.addrs) == 1 || len(hb.unhealthy) == 0 || len(hb.unhealthy) == len(hb.addrs) {
return hbAddrs
}
addrs := make([]grpc.Address, 0, len(hb.addrs)-len(hb.unhealthy))
for _, addr := range hb.addrs {
if _, unhealthy := hb.unhealthy[addr.Addr]; !unhealthy {
addrs = append(addrs, addr)
func (b *healthBalancer) updateAddrs(eps ...string) {
np := getHostPort2ep(eps)
b.mu.Lock()
defer b.mu.Unlock()
match := len(np) == len(b.hostPort2ep)
if match {
for k, v := range np {
if b.hostPort2ep[k] != v {
match = false
break
}
}
}
return addrs
if match {
// same endpoints, so no need to update address
return
}
b.hostPort2ep = np
b.addrs, b.eps = eps2addrs(eps), eps
b.unhealthyMu.Lock()
b.unhealthyHostPorts = make(map[string]time.Time)
b.unhealthyMu.Unlock()
}
func (hb *healthBalancer) hostPortError(hostPort string, err error) {
hb.mu.Lock()
if _, ok := hb.hostPort2ep[hostPort]; ok {
hb.unhealthy[hostPort] = time.Now()
func (b *healthBalancer) next() {
b.mu.RLock()
downc := b.downc
b.mu.RUnlock()
select {
case b.updateAddrsC <- notifyNext:
case <-b.stopc:
}
// wait until disconnect so new RPCs are not issued on old connection
select {
case <-downc:
case <-b.stopc:
}
}
func (b *healthBalancer) updateNotifyLoop() {
defer close(b.donec)
for {
b.mu.RLock()
upc, downc, addr := b.upc, b.downc, b.pinAddr
b.mu.RUnlock()
// downc or upc should be closed
select {
case <-downc:
downc = nil
default:
}
select {
case <-upc:
upc = nil
default:
}
switch {
case downc == nil && upc == nil:
// stale
select {
case <-b.stopc:
return
default:
}
case downc == nil:
b.notifyAddrs(notifyReset)
select {
case <-upc:
case msg := <-b.updateAddrsC:
b.notifyAddrs(msg)
case <-b.stopc:
return
}
case upc == nil:
select {
// close connections that are not the pinned address
case b.notifyCh <- []grpc.Address{{Addr: addr}}:
case <-downc:
case <-b.stopc:
return
}
select {
case <-downc:
b.notifyAddrs(notifyReset)
case msg := <-b.updateAddrsC:
b.notifyAddrs(msg)
case <-b.stopc:
return
}
}
}
}
func (b *healthBalancer) notifyAddrs(msg notifyMsg) {
if msg == notifyNext {
select {
case b.notifyCh <- []grpc.Address{}:
case <-b.stopc:
return
}
}
b.mu.RLock()
pinAddr := b.pinAddr
downc := b.downc
b.mu.RUnlock()
addrs, hostPorts := b.liveAddrs()
var waitDown bool
if pinAddr != "" {
_, ok := hostPorts[pinAddr]
waitDown = !ok
}
select {
case b.notifyCh <- addrs:
if waitDown {
select {
case <-downc:
case <-b.stopc:
}
}
case <-b.stopc:
}
}
func (b *healthBalancer) Up(addr grpc.Address) func(error) {
if !b.mayPin(addr) {
return func(err error) {}
}
b.mu.Lock()
defer b.mu.Unlock()
// gRPC might call Up after it called Close. We add this check
// to "fix" it up at application layer. Otherwise, will panic
// if b.upc is already closed.
if b.closed {
return func(err error) {}
}
// gRPC might call Up on a stale address.
// Prevent updating pinAddr with a stale address.
if !hasAddr(b.addrs, addr.Addr) {
return func(err error) {}
}
if b.pinAddr != "" {
if logger.V(4) {
logger.Infof("clientv3/health-balancer: marking %q as unhealthy (%q)", hostPort, err.Error())
logger.Infof("clientv3/balancer: %q is up but not pinned (already pinned %q)", addr.Addr, b.pinAddr)
}
return func(err error) {}
}
// notify waiting Get()s and pin first connected address
close(b.upc)
b.downc = make(chan struct{})
b.pinAddr = addr.Addr
if logger.V(4) {
logger.Infof("clientv3/balancer: pin %q", addr.Addr)
}
// notify client that a connection is up
b.readyOnce.Do(func() { close(b.readyc) })
return func(err error) {
// If connected to a black hole endpoint or a killed server, the gRPC ping
// timeout will induce a network I/O error, and retrying until success;
// finding healthy endpoint on retry could take several timeouts and redials.
// To avoid wasting retries, gray-list unhealthy endpoints.
b.hostPortError(addr.Addr, err)
b.mu.Lock()
b.upc = make(chan struct{})
close(b.downc)
b.pinAddr = ""
b.mu.Unlock()
if logger.V(4) {
logger.Infof("clientv3/balancer: unpin %q (%q)", addr.Addr, err.Error())
}
}
hb.mu.Unlock()
}
func (hb *healthBalancer) mayPin(addr grpc.Address) bool {
hb.mu.RLock()
if _, ok := hb.hostPort2ep[addr.Addr]; !ok { // stale host:port
hb.mu.RUnlock()
func (b *healthBalancer) mayPin(addr grpc.Address) bool {
if b.endpoint(addr.Addr) == "" { // stale host:port
return false
}
skip := len(hb.addrs) == 1 || len(hb.unhealthy) == 0 || len(hb.addrs) == len(hb.unhealthy)
failedTime, bad := hb.unhealthy[addr.Addr]
dur := hb.healthCheckTimeout
hb.mu.RUnlock()
b.unhealthyMu.RLock()
unhealthyCnt := len(b.unhealthyHostPorts)
failedTime, bad := b.unhealthyHostPorts[addr.Addr]
b.unhealthyMu.RUnlock()
b.mu.RLock()
skip := len(b.addrs) == 1 || unhealthyCnt == 0 || len(b.addrs) == unhealthyCnt
b.mu.RUnlock()
if skip || !bad {
return true
}
// prevent isolated member's endpoint from being infinitely retried, as follows:
// 1. keepalive pings detects GoAway with http2.ErrCodeEnhanceYourCalm
// 2. balancer 'Up' unpins with grpc: failed with network I/O error
// 3. grpc-healthcheck still SERVING, thus retry to pin
// instead, return before grpc-healthcheck if failed within healthcheck timeout
if elapsed := time.Since(failedTime); elapsed < dur {
if elapsed := time.Since(failedTime); elapsed < b.healthCheckTimeout {
if logger.V(4) {
logger.Infof("clientv3/health-balancer: %q is up but not pinned (failed %v ago, require minimum %v after failure)", addr.Addr, elapsed, dur)
logger.Infof("clientv3/balancer: %q is up but not pinned (failed %v ago, require minimum %v after failure)", addr.Addr, elapsed, b.healthCheckTimeout)
}
return false
}
if ok, _ := hb.healthCheck(addr.Addr); ok {
hb.mu.Lock()
delete(hb.unhealthy, addr.Addr)
hb.mu.Unlock()
if logger.V(4) {
logger.Infof("clientv3/health-balancer: %q is healthy (health check success)", addr.Addr)
}
if ok, _ := b.healthCheck(addr.Addr); ok {
b.removeUnhealthy(addr.Addr, "health check success")
return true
}
hb.mu.Lock()
hb.unhealthy[addr.Addr] = time.Now()
hb.mu.Unlock()
if logger.V(4) {
logger.Infof("clientv3/health-balancer: %q becomes unhealthy (health check failed)", addr.Addr)
}
b.hostPortError(addr.Addr, errors.New("health check failed"))
return false
}
func (b *healthBalancer) Get(ctx context.Context, opts grpc.BalancerGetOptions) (grpc.Address, func(), error) {
var (
addr string
closed bool
)
// If opts.BlockingWait is false (for fail-fast RPCs), it should return
// an address it has notified via Notify immediately instead of blocking.
if !opts.BlockingWait {
b.mu.RLock()
closed = b.closed
addr = b.pinAddr
b.mu.RUnlock()
if closed {
return grpc.Address{Addr: ""}, nil, grpc.ErrClientConnClosing
}
if addr == "" {
return grpc.Address{Addr: ""}, nil, ErrNoAddrAvilable
}
return grpc.Address{Addr: addr}, func() {}, nil
}
for {
b.mu.RLock()
ch := b.upc
b.mu.RUnlock()
select {
case <-ch:
case <-b.donec:
return grpc.Address{Addr: ""}, nil, grpc.ErrClientConnClosing
case <-ctx.Done():
return grpc.Address{Addr: ""}, nil, ctx.Err()
}
b.mu.RLock()
closed = b.closed
addr = b.pinAddr
b.mu.RUnlock()
// Close() which sets b.closed = true can be called before Get(), Get() must exit if balancer is closed.
if closed {
return grpc.Address{Addr: ""}, nil, grpc.ErrClientConnClosing
}
if addr != "" {
break
}
}
return grpc.Address{Addr: addr}, func() {}, nil
}
func (b *healthBalancer) Notify() <-chan []grpc.Address { return b.notifyCh }
func (b *healthBalancer) Close() error {
b.mu.Lock()
// In case gRPC calls close twice. TODO: remove the checking
// when we are sure that gRPC wont call close twice.
if b.closed {
b.mu.Unlock()
<-b.donec
return nil
}
b.closed = true
b.stopOnce.Do(func() { close(b.stopc) })
b.pinAddr = ""
// In the case of following scenario:
// 1. upc is not closed; no pinned address
// 2. client issues an RPC, calling invoke(), which calls Get(), enters for loop, blocks
// 3. client.conn.Close() calls balancer.Close(); closed = true
// 4. for loop in Get() never exits since ctx is the context passed in by the client and may not be canceled
// we must close upc so Get() exits from blocking on upc
select {
case <-b.upc:
default:
// terminate all waiting Get()s
close(b.upc)
}
b.mu.Unlock()
b.wg.Wait()
// wait for updateNotifyLoop to finish
<-b.donec
close(b.notifyCh)
return nil
}
func grpcHealthCheck(client *Client, ep string) (bool, error) {
conn, err := client.dial(ep)
if err != nil {
@ -238,8 +583,7 @@ func grpcHealthCheck(client *Client, ep string) (bool, error) {
cancel()
if err != nil {
if s, ok := status.FromError(err); ok && s.Code() == codes.Unavailable {
if s.Message() == unknownService {
// etcd < v3.3.0
if s.Message() == unknownService { // etcd < v3.3.0
return true, nil
}
}
@ -247,3 +591,37 @@ func grpcHealthCheck(client *Client, ep string) (bool, error) {
}
return resp.Status == healthpb.HealthCheckResponse_SERVING, nil
}
func hasAddr(addrs []grpc.Address, targetAddr string) bool {
for _, addr := range addrs {
if targetAddr == addr.Addr {
return true
}
}
return false
}
func getHost(ep string) string {
url, uerr := url.Parse(ep)
if uerr != nil || !strings.Contains(ep, "://") {
return ep
}
return url.Host
}
func eps2addrs(eps []string) []grpc.Address {
addrs := make([]grpc.Address, len(eps))
for i := range eps {
addrs[i].Addr = getHost(eps[i])
}
return addrs
}
func getHostPort2ep(eps []string) map[string]string {
hm := make(map[string]string, len(eps))
for i := range eps {
_, host, _ := parseEndpoint(eps[i])
hm[host] = eps[i]
}
return hm
}

71
clientv3/balancer_test.go → clientv3/health_balancer_test.go
View File

@ -1,4 +1,4 @@
// Copyright 2016 The etcd Authors
// Copyright 2017 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
@ -28,29 +28,27 @@ import (
"google.golang.org/grpc"
)
var (
endpoints = []string{"localhost:2379", "localhost:22379", "localhost:32379"}
)
var endpoints = []string{"localhost:2379", "localhost:22379", "localhost:32379"}
func TestBalancerGetUnblocking(t *testing.T) {
sb := newSimpleBalancer(endpoints)
defer sb.Close()
if addrs := <-sb.Notify(); len(addrs) != len(endpoints) {
t.Errorf("Initialize newSimpleBalancer should have triggered Notify() chan, but it didn't")
hb := newHealthBalancer(endpoints, minHealthRetryDuration, func(string) (bool, error) { return true, nil })
defer hb.Close()
if addrs := <-hb.Notify(); len(addrs) != len(endpoints) {
t.Errorf("Initialize newHealthBalancer should have triggered Notify() chan, but it didn't")
}
unblockingOpts := grpc.BalancerGetOptions{BlockingWait: false}
_, _, err := sb.Get(context.Background(), unblockingOpts)
_, _, err := hb.Get(context.Background(), unblockingOpts)
if err != ErrNoAddrAvilable {
t.Errorf("Get() with no up endpoints should return ErrNoAddrAvailable, got: %v", err)
}
down1 := sb.Up(grpc.Address{Addr: endpoints[1]})
if addrs := <-sb.Notify(); len(addrs) != 1 {
down1 := hb.Up(grpc.Address{Addr: endpoints[1]})
if addrs := <-hb.Notify(); len(addrs) != 1 {
t.Errorf("first Up() should have triggered balancer to send the first connected address via Notify chan so that other connections can be closed")
}
down2 := sb.Up(grpc.Address{Addr: endpoints[2]})
addrFirst, putFun, err := sb.Get(context.Background(), unblockingOpts)
down2 := hb.Up(grpc.Address{Addr: endpoints[2]})
addrFirst, putFun, err := hb.Get(context.Background(), unblockingOpts)
if err != nil {
t.Errorf("Get() with up endpoints should success, got %v", err)
}
@ -60,32 +58,32 @@ func TestBalancerGetUnblocking(t *testing.T) {
if putFun == nil {
t.Errorf("Get() returned unexpected nil put function")
}
addrSecond, _, _ := sb.Get(context.Background(), unblockingOpts)
addrSecond, _, _ := hb.Get(context.Background(), unblockingOpts)
if addrFirst.Addr != addrSecond.Addr {
t.Errorf("Get() didn't return the same address as previous call, got %v and %v", addrFirst, addrSecond)
}
down1(errors.New("error"))
if addrs := <-sb.Notify(); len(addrs) != len(endpoints) {
t.Errorf("closing the only connection should triggered balancer to send the all endpoints via Notify chan so that we can establish a connection")
if addrs := <-hb.Notify(); len(addrs) != len(endpoints)-1 { // we call down on one endpoint
t.Errorf("closing the only connection should triggered balancer to send the %d endpoints via Notify chan so that we can establish a connection", len(endpoints)-1)
}
down2(errors.New("error"))
_, _, err = sb.Get(context.Background(), unblockingOpts)
_, _, err = hb.Get(context.Background(), unblockingOpts)
if err != ErrNoAddrAvilable {
t.Errorf("Get() with no up endpoints should return ErrNoAddrAvailable, got: %v", err)
}
}
func TestBalancerGetBlocking(t *testing.T) {
sb := newSimpleBalancer(endpoints)
defer sb.Close()
if addrs := <-sb.Notify(); len(addrs) != len(endpoints) {
t.Errorf("Initialize newSimpleBalancer should have triggered Notify() chan, but it didn't")
hb := newHealthBalancer(endpoints, minHealthRetryDuration, func(string) (bool, error) { return true, nil })
defer hb.Close()
if addrs := <-hb.Notify(); len(addrs) != len(endpoints) {
t.Errorf("Initialize newHealthBalancer should have triggered Notify() chan, but it didn't")
}
blockingOpts := grpc.BalancerGetOptions{BlockingWait: true}
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*100)
_, _, err := sb.Get(ctx, blockingOpts)
_, _, err := hb.Get(ctx, blockingOpts)
cancel()
if err != context.DeadlineExceeded {
t.Errorf("Get() with no up endpoints should timeout, got %v", err)
@ -94,15 +92,15 @@ func TestBalancerGetBlocking(t *testing.T) {
downC := make(chan func(error), 1)
go func() {
// ensure sb.Up() will be called after sb.Get() to see if Up() releases blocking Get()
// ensure hb.Up() will be called after hb.Get() to see if Up() releases blocking Get()
time.Sleep(time.Millisecond * 100)
f := sb.Up(grpc.Address{Addr: endpoints[1]})
if addrs := <-sb.Notify(); len(addrs) != 1 {
f := hb.Up(grpc.Address{Addr: endpoints[1]})
if addrs := <-hb.Notify(); len(addrs) != 1 {
t.Errorf("first Up() should have triggered balancer to send the first connected address via Notify chan so that other connections can be closed")
}
downC <- f
}()
addrFirst, putFun, err := sb.Get(context.Background(), blockingOpts)
addrFirst, putFun, err := hb.Get(context.Background(), blockingOpts)
if err != nil {
t.Errorf("Get() with up endpoints should success, got %v", err)
}
@ -114,19 +112,19 @@ func TestBalancerGetBlocking(t *testing.T) {
}
down1 := <-downC
down2 := sb.Up(grpc.Address{Addr: endpoints[2]})
addrSecond, _, _ := sb.Get(context.Background(), blockingOpts)
down2 := hb.Up(grpc.Address{Addr: endpoints[2]})
addrSecond, _, _ := hb.Get(context.Background(), blockingOpts)
if addrFirst.Addr != addrSecond.Addr {
t.Errorf("Get() didn't return the same address as previous call, got %v and %v", addrFirst, addrSecond)
}
down1(errors.New("error"))
if addrs := <-sb.Notify(); len(addrs) != len(endpoints) {
t.Errorf("closing the only connection should triggered balancer to send the all endpoints via Notify chan so that we can establish a connection")
if addrs := <-hb.Notify(); len(addrs) != len(endpoints)-1 { // we call down on one endpoint
t.Errorf("closing the only connection should triggered balancer to send the %d endpoints via Notify chan so that we can establish a connection", len(endpoints)-1)
}
down2(errors.New("error"))
ctx, cancel = context.WithTimeout(context.Background(), time.Millisecond*100)
_, _, err = sb.Get(ctx, blockingOpts)
_, _, err = hb.Get(ctx, blockingOpts)
cancel()
if err != context.DeadlineExceeded {
t.Errorf("Get() with no up endpoints should timeout, got %v", err)
@ -168,9 +166,8 @@ func TestHealthBalancerGraylist(t *testing.T) {
}()
}
sb := newSimpleBalancer(eps)
tf := func(s string) (bool, error) { return false, nil }
hb := newHealthBalancer(sb, 5*time.Second, tf)
hb := newHealthBalancer(eps, 5*time.Second, tf)
conn, err := grpc.Dial("", grpc.WithInsecure(), grpc.WithBalancer(hb))
testutil.AssertNil(t, err)
@ -203,13 +200,13 @@ func TestBalancerDoNotBlockOnClose(t *testing.T) {
defer kcl.close()
for i := 0; i < 5; i++ {
sb := newSimpleBalancer(kcl.endpoints())
conn, err := grpc.Dial("", grpc.WithInsecure(), grpc.WithBalancer(sb))
hb := newHealthBalancer(kcl.endpoints(), minHealthRetryDuration, func(string) (bool, error) { return true, nil })
conn, err := grpc.Dial("", grpc.WithInsecure(), grpc.WithBalancer(hb))
if err != nil {
t.Fatal(err)
}
kvc := pb.NewKVClient(conn)
<-sb.readyc
<-hb.readyc
var wg sync.WaitGroup
wg.Add(100)
@ -225,7 +222,7 @@ func TestBalancerDoNotBlockOnClose(t *testing.T) {
bclosec, cclosec := make(chan struct{}), make(chan struct{})
go func() {
defer close(bclosec)
sb.Close()
hb.Close()
}()
go func() {
defer close(cclosec)

5
clientv3/integration/kv_test.go
View File

@ -472,8 +472,9 @@ func TestKVNewAfterClose(t *testing.T) {
donec := make(chan struct{})
go func() {
if _, err := cli.Get(context.TODO(), "foo"); err != context.Canceled {
t.Fatalf("expected %v, got %v", context.Canceled, err)
_, err := cli.Get(context.TODO(), "foo")
if err != context.Canceled && err != grpc.ErrClientConnClosing {
t.Fatalf("expected %v or %v, got %v", context.Canceled, grpc.ErrClientConnClosing, err)
}
close(donec)
}()

3
clientv3/retry.go
View File

@ -45,7 +45,8 @@ func isNonRepeatableStopError(err error) bool {
if ev.Code() != codes.Unavailable {
return true
}
return rpctypes.ErrorDesc(err) != "there is no address available"
desc := rpctypes.ErrorDesc(err)
return desc != "there is no address available" && desc != "there is no connection available"
}
func (c *Client) newRetryWrapper(isStop retryStopErrFunc) retryRPCFunc {

2
cmd/vendor/google.golang.org/grpc/balancer.go generated vendored
View File

@ -403,6 +403,6 @@ type pickFirst struct {
*roundRobin
}
func pickFirstBalancer(r naming.Resolver) Balancer {
func pickFirstBalancerV1(r naming.Resolver) Balancer {
return &pickFirst{&roundRobin{r: r}}
}

206
cmd/vendor/google.golang.org/grpc/balancer/balancer.go generated vendored Normal file
View File

@ -0,0 +1,206 @@
/*
*
* Copyright 2017 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 balancer defines APIs for load balancing in gRPC.
// All APIs in this package are experimental.
package balancer
import (
"errors"
"net"
"golang.org/x/net/context"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/resolver"
)
var (
// m is a map from name to balancer builder.
m = make(map[string]Builder)
// defaultBuilder is the default balancer to use.
defaultBuilder Builder // TODO(bar) install pickfirst as default.
)
// Register registers the balancer builder to the balancer map.
// b.Name will be used as the name registered with this builder.
func Register(b Builder) {
m[b.Name()] = b
}
// Get returns the resolver builder registered with the given name.
// If no builder is register with the name, the default pickfirst will
// be used.
func Get(name string) Builder {
if b, ok := m[name]; ok {
return b
}
return defaultBuilder
}
// SubConn represents a gRPC sub connection.
// Each sub connection contains a list of addresses. gRPC will
// try to connect to them (in sequence), and stop trying the
// remainder once one connection is successful.
//
// The reconnect backoff will be applied on the list, not a single address.
// For example, try_on_all_addresses -> backoff -> try_on_all_addresses.
//
// All SubConns start in IDLE, and will not try to connect. To trigger
// the connecting, Balancers must call Connect.
// When the connection encounters an error, it will reconnect immediately.
// When the connection becomes IDLE, it will not reconnect unless Connect is
// called.
type SubConn interface {
// UpdateAddresses updates the addresses used in this SubConn.
// gRPC checks if currently-connected address is still in the new list.
// If it's in the list, the connection will be kept.
// If it's not in the list, the connection will gracefully closed, and
// a new connection will be created.
//
// This will trigger a state transition for the SubConn.
UpdateAddresses([]resolver.Address)
// Connect starts the connecting for this SubConn.
Connect()
}
// NewSubConnOptions contains options to create new SubConn.
type NewSubConnOptions struct{}
// ClientConn represents a gRPC ClientConn.
type ClientConn interface {
// NewSubConn is called by balancer to create a new SubConn.
// It doesn't block and wait for the connections to be established.
// Behaviors of the SubConn can be controlled by options.
NewSubConn([]resolver.Address, NewSubConnOptions) (SubConn, error)
// RemoveSubConn removes the SubConn from ClientConn.
// The SubConn will be shutdown.
RemoveSubConn(SubConn)
// UpdateBalancerState is called by balancer to nofity gRPC that some internal
// state in balancer has changed.
//
// gRPC will update the connectivity state of the ClientConn, and will call pick
// on the new picker to pick new SubConn.
UpdateBalancerState(s connectivity.State, p Picker)
// Target returns the dial target for this ClientConn.
Target() string
}
// BuildOptions contains additional information for Build.
type BuildOptions struct {
// DialCreds is the transport credential the Balancer implementation can
// use to dial to a remote load balancer server. The Balancer implementations
// can ignore this if it does not need to talk to another party securely.
DialCreds credentials.TransportCredentials
// Dialer is the custom dialer the Balancer implementation can use to dial
// to a remote load balancer server. The Balancer implementations
// can ignore this if it doesn't need to talk to remote balancer.
Dialer func(context.Context, string) (net.Conn, error)
}
// Builder creates a balancer.
type Builder interface {
// Build creates a new balancer with the ClientConn.
Build(cc ClientConn, opts BuildOptions) Balancer
// Name returns the name of balancers built by this builder.
// It will be used to pick balancers (for example in service config).
Name() string
}
// PickOptions contains addition information for the Pick operation.
type PickOptions struct{}
// DoneInfo contains additional information for done.
type DoneInfo struct {
// Err is the rpc error the RPC finished with. It could be nil.
Err error
}
var (
// ErrNoSubConnAvailable indicates no SubConn is available for pick().
// gRPC will block the RPC until a new picker is available via UpdateBalancerState().
ErrNoSubConnAvailable = errors.New("no SubConn is available")
// ErrTransientFailure indicates all SubConns are in TransientFailure.
// WaitForReady RPCs will block, non-WaitForReady RPCs will fail.
ErrTransientFailure = errors.New("all SubConns are in TransientFailure")
)
// Picker is used by gRPC to pick a SubConn to send an RPC.
// Balancer is expected to generate a new picker from its snapshot everytime its
// internal state has changed.
//
// The pickers used by gRPC can be updated by ClientConn.UpdateBalancerState().
type Picker interface {
// Pick returns the SubConn to be used to send the RPC.
// The returned SubConn must be one returned by NewSubConn().
//
// This functions is expected to return:
// - a SubConn that is known to be READY;
// - ErrNoSubConnAvailable if no SubConn is available, but progress is being
// made (for example, some SubConn is in CONNECTING mode);
// - other errors if no active connecting is happening (for example, all SubConn
// are in TRANSIENT_FAILURE mode).
//
// If a SubConn is returned:
// - If it is READY, gRPC will send the RPC on it;
// - If it is not ready, or becomes not ready after it's returned, gRPC will block
// this call until a new picker is updated and will call pick on the new picker.
//
// If the returned error is not nil:
// - If the error is ErrNoSubConnAvailable, gRPC will block until UpdateBalancerState()
// - If the error is ErrTransientFailure:
// - If the RPC is wait-for-ready, gRPC will block until UpdateBalancerState()
// is called to pick again;
// - Otherwise, RPC will fail with unavailable error.
// - Else (error is other non-nil error):
// - The RPC will fail with unavailable error.
//
// The returned done() function will be called once the rpc has finished, with the
// final status of that RPC.
// done may be nil if balancer doesn't care about the RPC status.
Pick(ctx context.Context, opts PickOptions) (conn SubConn, done func(DoneInfo), err error)
}
// Balancer takes input from gRPC, manages SubConns, and collects and aggregates
// the connectivity states.
//
// It also generates and updates the Picker used by gRPC to pick SubConns for RPCs.
//
// HandleSubConnectionStateChange, HandleResolvedAddrs and Close are guaranteed
// to be called synchronously from the same goroutine.
// There's no guarantee on picker.Pick, it may be called anytime.
type Balancer interface {
// HandleSubConnStateChange is called by gRPC when the connectivity state
// of sc has changed.
// Balancer is expected to aggregate all the state of SubConn and report
// that back to gRPC.
// Balancer should also generate and update Pickers when its internal state has
// been changed by the new state.
HandleSubConnStateChange(sc SubConn, state connectivity.State)
// HandleResolvedAddrs is called by gRPC to send updated resolved addresses to
// balancers.
// Balancer can create new SubConn or remove SubConn with the addresses.
// An empty address slice and a non-nil error will be passed if the resolver returns
// non-nil error to gRPC.
HandleResolvedAddrs([]resolver.Address, error)
// Close closes the balancer. The balancer is not required to call
// ClientConn.RemoveSubConn for its existing SubConns.
Close()
}

248
cmd/vendor/google.golang.org/grpc/balancer_conn_wrappers.go generated vendored Normal file
View File

@ -0,0 +1,248 @@
/*
*
* Copyright 2017 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 (
"sync"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
// scStateUpdate contains the subConn and the new state it changed to.
type scStateUpdate struct {
sc balancer.SubConn
state connectivity.State
}
// scStateUpdateBuffer is an unbounded channel for scStateChangeTuple.
// TODO make a general purpose buffer that uses interface{}.
type scStateUpdateBuffer struct {
c chan *scStateUpdate
mu sync.Mutex
backlog []*scStateUpdate
}
func newSCStateUpdateBuffer() *scStateUpdateBuffer {
return &scStateUpdateBuffer{
c: make(chan *scStateUpdate, 1),
}
}
func (b *scStateUpdateBuffer) put(t *scStateUpdate) {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) == 0 {
select {
case b.c <- t:
return
default:
}
}
b.backlog = append(b.backlog, t)
}
func (b *scStateUpdateBuffer) load() {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) > 0 {
select {
case b.c <- b.backlog[0]:
b.backlog[0] = nil
b.backlog = b.backlog[1:]
default:
}
}
}
// get returns the channel that receives a recvMsg in the buffer.
//
// Upon receiving, the caller should call load to send another
// scStateChangeTuple onto the channel if there is any.
func (b *scStateUpdateBuffer) get() <-chan *scStateUpdate {
return b.c
}
// resolverUpdate contains the new resolved addresses or error if there's
// any.
type resolverUpdate struct {
addrs []resolver.Address
err error
}
// ccBalancerWrapper is a wrapper on top of cc for balancers.
// It implements balancer.ClientConn interface.
type ccBalancerWrapper struct {
cc *ClientConn
balancer balancer.Balancer
stateChangeQueue *scStateUpdateBuffer
resolverUpdateCh chan *resolverUpdate
done chan struct{}
}
func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.BuildOptions) *ccBalancerWrapper {
ccb := &ccBalancerWrapper{
cc: cc,
stateChangeQueue: newSCStateUpdateBuffer(),
resolverUpdateCh: make(chan *resolverUpdate, 1),
done: make(chan struct{}),
}
go ccb.watcher()
ccb.balancer = b.Build(ccb, bopts)
return ccb
}
// watcher balancer functions sequencially, so the balancer can be implemeneted
// lock-free.
func (ccb *ccBalancerWrapper) watcher() {
for {
select {
case t := <-ccb.stateChangeQueue.get():
ccb.stateChangeQueue.load()
ccb.balancer.HandleSubConnStateChange(t.sc, t.state)
case t := <-ccb.resolverUpdateCh:
ccb.balancer.HandleResolvedAddrs(t.addrs, t.err)
case <-ccb.done:
}
select {
case <-ccb.done:
ccb.balancer.Close()
return
default:
}
}
}
func (ccb *ccBalancerWrapper) close() {
close(ccb.done)
}
func (ccb *ccBalancerWrapper) handleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
// When updating addresses for a SubConn, if the address in use is not in
// the new addresses, the old ac will be tearDown() and a new ac will be
// created. tearDown() generates a state change with Shutdown state, we
// don't want the balancer to receive this state change. So before
// tearDown() on the old ac, ac.acbw (acWrapper) will be set to nil, and
// this function will be called with (nil, Shutdown). We don't need to call
// balancer method in this case.
if sc == nil {
return
}
ccb.stateChangeQueue.put(&scStateUpdate{
sc: sc,
state: s,
})
}
func (ccb *ccBalancerWrapper) handleResolvedAddrs(addrs []resolver.Address, err error) {
select {
case <-ccb.resolverUpdateCh:
default:
}
ccb.resolverUpdateCh <- &resolverUpdate{
addrs: addrs,
err: err,
}
}
func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
grpclog.Infof("ccBalancerWrapper: new subconn: %v", addrs)
ac, err := ccb.cc.newAddrConn(addrs)
if err != nil {
return nil, err
}
acbw := &acBalancerWrapper{ac: ac}
ac.acbw = acbw
return acbw, nil
}
func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
grpclog.Infof("ccBalancerWrapper: removing subconn")
acbw, ok := sc.(*acBalancerWrapper)
if !ok {
return
}
ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
}
func (ccb *ccBalancerWrapper) UpdateBalancerState(s connectivity.State, p balancer.Picker) {
grpclog.Infof("ccBalancerWrapper: updating state and picker called by balancer: %v, %p", s, p)
ccb.cc.csMgr.updateState(s)
ccb.cc.blockingpicker.updatePicker(p)
}
func (ccb *ccBalancerWrapper) Target() string {
return ccb.cc.target
}
// acBalancerWrapper is a wrapper on top of ac for balancers.
// It implements balancer.SubConn interface.
type acBalancerWrapper struct {
mu sync.Mutex
ac *addrConn
}
func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
grpclog.Infof("acBalancerWrapper: UpdateAddresses called with %v", addrs)
acbw.mu.Lock()
defer acbw.mu.Unlock()
if !acbw.ac.tryUpdateAddrs(addrs) {
cc := acbw.ac.cc
acbw.ac.mu.Lock()
// Set old ac.acbw to nil so the Shutdown state update will be ignored
// by balancer.
//
// TODO(bar) the state transition could be wrong when tearDown() old ac
// and creating new ac, fix the transition.
acbw.ac.acbw = nil
acbw.ac.mu.Unlock()
acState := acbw.ac.getState()
acbw.ac.tearDown(errConnDrain)
if acState == connectivity.Shutdown {
return
}
ac, err := cc.newAddrConn(addrs)
if err != nil {
grpclog.Warningf("acBalancerWrapper: UpdateAddresses: failed to newAddrConn: %v", err)
return
}
acbw.ac = ac
ac.acbw = acbw
if acState != connectivity.Idle {
ac.connect(false)
}
}
}
func (acbw *acBalancerWrapper) Connect() {
acbw.mu.Lock()
defer acbw.mu.Unlock()
acbw.ac.connect(false)
}
func (acbw *acBalancerWrapper) getAddrConn() *addrConn {
acbw.mu.Lock()
defer acbw.mu.Unlock()
return acbw.ac
}

367
cmd/vendor/google.golang.org/grpc/balancer_v1_wrapper.go generated vendored Normal file
View File

@ -0,0 +1,367 @@
/*
*
* Copyright 2017 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 (
"sync"
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
type balancerWrapperBuilder struct {
b Balancer // The v1 balancer.
}
func (bwb *balancerWrapperBuilder) Build(cc balancer.ClientConn, opts balancer.BuildOptions) balancer.Balancer {
bwb.b.Start(cc.Target(), BalancerConfig{
DialCreds: opts.DialCreds,
Dialer: opts.Dialer,
})
_, pickfirst := bwb.b.(*pickFirst)
bw := &balancerWrapper{
balancer: bwb.b,
pickfirst: pickfirst,
cc: cc,
startCh: make(chan struct{}),
conns: make(map[resolver.Address]balancer.SubConn),
connSt: make(map[balancer.SubConn]*scState),
csEvltr: &connectivityStateEvaluator{},
state: connectivity.Idle,
}
cc.UpdateBalancerState(connectivity.Idle, bw)
go bw.lbWatcher()
return bw
}
func (bwb *balancerWrapperBuilder) Name() string {
return "wrapper"
}
type scState struct {
addr Address // The v1 address type.
s connectivity.State
down func(error)
}
type balancerWrapper struct {
balancer Balancer // The v1 balancer.
pickfirst bool
cc balancer.ClientConn
// To aggregate the connectivity state.
csEvltr *connectivityStateEvaluator
state connectivity.State
mu sync.Mutex
conns map[resolver.Address]balancer.SubConn
connSt map[balancer.SubConn]*scState
// This channel is closed when handling the first resolver result.
// lbWatcher blocks until this is closed, to avoid race between
// - NewSubConn is created, cc wants to notify balancer of state changes;
// - Build hasn't return, cc doesn't have access to balancer.
startCh chan struct{}
}
// lbWatcher watches the Notify channel of the balancer and manages
// connections accordingly.
func (bw *balancerWrapper) lbWatcher() {
<-bw.startCh
grpclog.Infof("balancerWrapper: is pickfirst: %v\n", bw.pickfirst)
notifyCh := bw.balancer.Notify()
if notifyCh == nil {
// There's no resolver in the balancer. Connect directly.
a := resolver.Address{
Addr: bw.cc.Target(),
Type: resolver.Backend,
}
sc, err := bw.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Warningf("Error creating connection to %v. Err: %v", a, err)
} else {
bw.mu.Lock()
bw.conns[a] = sc
bw.connSt[sc] = &scState{
addr: Address{Addr: bw.cc.Target()},
s: connectivity.Idle,
}
bw.mu.Unlock()
sc.Connect()
}
return
}
for addrs := range notifyCh {
grpclog.Infof("balancerWrapper: got update addr from Notify: %v\n", addrs)
if bw.pickfirst {
var (
oldA resolver.Address
oldSC balancer.SubConn
)
bw.mu.Lock()
for oldA, oldSC = range bw.conns {
break
}
bw.mu.Unlock()
if len(addrs) <= 0 {
if oldSC != nil {
// Teardown old sc.
bw.mu.Lock()
delete(bw.conns, oldA)
delete(bw.connSt, oldSC)
bw.mu.Unlock()
bw.cc.RemoveSubConn(oldSC)
}
continue
}
var newAddrs []resolver.Address
for _, a := range addrs {
newAddr := resolver.Address{
Addr: a.Addr,
Type: resolver.Backend, // All addresses from balancer are all backends.
ServerName: "",
Metadata: a.Metadata,
}
newAddrs = append(newAddrs, newAddr)
}
if oldSC == nil {
// Create new sc.
sc, err := bw.cc.NewSubConn(newAddrs, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Warningf("Error creating connection to %v. Err: %v", newAddrs, err)
} else {
bw.mu.Lock()
// For pickfirst, there should be only one SubConn, so the
// address doesn't matter. All states updating (up and down)
// and picking should all happen on that only SubConn.
bw.conns[resolver.Address{}] = sc
bw.connSt[sc] = &scState{
addr: addrs[0], // Use the first address.
s: connectivity.Idle,
}
bw.mu.Unlock()
sc.Connect()
}
} else {
oldSC.UpdateAddresses(newAddrs)
bw.mu.Lock()
bw.connSt[oldSC].addr = addrs[0]
bw.mu.Unlock()
}
} else {
var (
add []resolver.Address // Addresses need to setup connections.
del []balancer.SubConn // Connections need to tear down.
)
resAddrs := make(map[resolver.Address]Address)
for _, a := range addrs {
resAddrs[resolver.Address{
Addr: a.Addr,
Type: resolver.Backend, // All addresses from balancer are all backends.
ServerName: "",
Metadata: a.Metadata,
}] = a
}
bw.mu.Lock()
for a := range resAddrs {
if _, ok := bw.conns[a]; !ok {
add = append(add, a)
}
}
for a, c := range bw.conns {
if _, ok := resAddrs[a]; !ok {
del = append(del, c)
delete(bw.conns, a)
// Keep the state of this sc in bw.connSt until its state becomes Shutdown.
}
}
bw.mu.Unlock()
for _, a := range add {
sc, err := bw.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Warningf("Error creating connection to %v. Err: %v", a, err)
} else {
bw.mu.Lock()
bw.conns[a] = sc
bw.connSt[sc] = &scState{
addr: resAddrs[a],
s: connectivity.Idle,
}
bw.mu.Unlock()
sc.Connect()
}
}
for _, c := range del {
bw.cc.RemoveSubConn(c)
}
}
}
}
func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
grpclog.Infof("balancerWrapper: handle subconn state change: %p, %v", sc, s)
bw.mu.Lock()
defer bw.mu.Unlock()
scSt, ok := bw.connSt[sc]
if !ok {
return
}
if s == connectivity.Idle {
sc.Connect()
}
oldS := scSt.s
scSt.s = s
if oldS != connectivity.Ready && s == connectivity.Ready {
scSt.down = bw.balancer.Up(scSt.addr)
} else if oldS == connectivity.Ready && s != connectivity.Ready {
if scSt.down != nil {
scSt.down(errConnClosing)
}
}
sa := bw.csEvltr.recordTransition(oldS, s)
if bw.state != sa {
bw.state = sa
}
bw.cc.UpdateBalancerState(bw.state, bw)
if s == connectivity.Shutdown {
// Remove state for this sc.
delete(bw.connSt, sc)
}
return
}
func (bw *balancerWrapper) HandleResolvedAddrs([]resolver.Address, error) {
bw.mu.Lock()
defer bw.mu.Unlock()
select {
case <-bw.startCh:
default:
close(bw.startCh)
}
// There should be a resolver inside the balancer.
// All updates here, if any, are ignored.
return
}
func (bw *balancerWrapper) Close() {
bw.mu.Lock()
defer bw.mu.Unlock()
select {
case <-bw.startCh:
default:
close(bw.startCh)
}
bw.balancer.Close()
return
}
// The picker is the balancerWrapper itself.
// Pick should never return ErrNoSubConnAvailable.
// It either blocks or returns error, consistent with v1 balancer Get().
func (bw *balancerWrapper) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
failfast := true // Default failfast is true.
if ss, ok := rpcInfoFromContext(ctx); ok {
failfast = ss.failfast
}
a, p, err := bw.balancer.Get(ctx, BalancerGetOptions{BlockingWait: !failfast})
if err != nil {
return nil, nil, err
}
var done func(balancer.DoneInfo)
if p != nil {
done = func(i balancer.DoneInfo) { p() }
}
var sc balancer.SubConn
bw.mu.Lock()
defer bw.mu.Unlock()
if bw.pickfirst {
// Get the first sc in conns.
for _, sc = range bw.conns {
break
}
} else {
var ok bool
sc, ok = bw.conns[resolver.Address{
Addr: a.Addr,
Type: resolver.Backend,
ServerName: "",
Metadata: a.Metadata,
}]
if !ok && failfast {
return nil, nil, Errorf(codes.Unavailable, "there is no connection available")
}
if s, ok := bw.connSt[sc]; failfast && (!ok || s.s != connectivity.Ready) {
// If the returned sc is not ready and RPC is failfast,
// return error, and this RPC will fail.
return nil, nil, Errorf(codes.Unavailable, "there is no connection available")
}
}
return sc, done, nil
}
// connectivityStateEvaluator gets updated by addrConns when their
// states transition, based on which it evaluates the state of
// ClientConn.
type connectivityStateEvaluator struct {
mu sync.Mutex
numReady uint64 // Number of addrConns in ready state.
numConnecting uint64 // Number of addrConns in connecting state.
numTransientFailure uint64 // Number of addrConns in transientFailure.
}
// recordTransition records state change happening in every subConn and based on
// that it evaluates what aggregated state should be.
// It can only transition between Ready, Connecting and TransientFailure. Other states,
// Idle and Shutdown are transitioned into by ClientConn; in the beginning of the connection
// before any subConn is created ClientConn is in idle state. In the end when ClientConn
// closes it is in Shutdown state.
// TODO Note that in later releases, a ClientConn with no activity will be put into an Idle state.
func (cse *connectivityStateEvaluator) recordTransition(oldState, newState connectivity.State) connectivity.State {
cse.mu.Lock()
defer cse.mu.Unlock()
// Update counters.
for idx, state := range []connectivity.State{oldState, newState} {
updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
switch state {
case connectivity.Ready:
cse.numReady += updateVal
case connectivity.Connecting:
cse.numConnecting += updateVal
case connectivity.TransientFailure:
cse.numTransientFailure += updateVal
}
}
// Evaluate.
if cse.numReady > 0 {
return connectivity.Ready
}
if cse.numConnecting > 0 {
return connectivity.Connecting
}
return connectivity.TransientFailure
}

38
cmd/vendor/google.golang.org/grpc/call.go generated vendored
View File

@ -25,6 +25,7 @@ import (
"golang.org/x/net/context"
"golang.org/x/net/trace"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
@ -135,7 +136,7 @@ func Invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
}
func invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (e error) {
c := defaultCallInfo
c := defaultCallInfo()
mc := cc.GetMethodConfig(method)
if mc.WaitForReady != nil {
c.failFast = !*mc.WaitForReady
@ -149,13 +150,13 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
opts = append(cc.dopts.callOptions, opts...)
for _, o := range opts {
if err := o.before(&c); err != nil {
if err := o.before(c); err != nil {
return toRPCErr(err)
}
}
defer func() {
for _, o := range opts {
o.after(&c)
o.after(c)
}
}()
@ -178,7 +179,7 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
}
}()
}
ctx = newContextWithRPCInfo(ctx)
ctx = newContextWithRPCInfo(ctx, c.failFast)
sh := cc.dopts.copts.StatsHandler
if sh != nil {
ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
@ -206,9 +207,9 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
err error
t transport.ClientTransport
stream *transport.Stream
// Record the put handler from Balancer.Get(...). It is called once the
// Record the done handler from Balancer.Get(...). It is called once the
// RPC has completed or failed.
put func()
done func(balancer.DoneInfo)
)
// TODO(zhaoq): Need a formal spec of fail-fast.
callHdr := &transport.CallHdr{
@ -222,10 +223,7 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
callHdr.Creds = c.creds
}
gopts := BalancerGetOptions{
BlockingWait: !c.failFast,
}
t, put, err = cc.getTransport(ctx, gopts)
t, done, err = cc.getTransport(ctx, c.failFast)
if err != nil {
// TODO(zhaoq): Probably revisit the error handling.
if _, ok := status.FromError(err); ok {
@ -245,14 +243,14 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
}
stream, err = t.NewStream(ctx, callHdr)
if err != nil {
if put != nil {
if done != nil {
if _, ok := err.(transport.ConnectionError); ok {
// If error is connection error, transport was sending data on wire,
// and we are not sure if anything has been sent on wire.
// If error is not connection error, we are sure nothing has been sent.
updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
}
put()
done(balancer.DoneInfo{Err: err})
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
@ -262,14 +260,14 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
if peer, ok := peer.FromContext(stream.Context()); ok {
c.peer = peer
}
err = sendRequest(ctx, cc.dopts, cc.dopts.cp, &c, callHdr, stream, t, args, topts)
err = sendRequest(ctx, cc.dopts, cc.dopts.cp, c, callHdr, stream, t, args, topts)
if err != nil {
if put != nil {
if done != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
done(balancer.DoneInfo{Err: err})
}
// Retry a non-failfast RPC when
// i) there is a connection error; or
@ -279,14 +277,14 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
}
return toRPCErr(err)
}
err = recvResponse(ctx, cc.dopts, t, &c, stream, reply)
err = recvResponse(ctx, cc.dopts, t, c, stream, reply)
if err != nil {
if put != nil {
if done != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
done(balancer.DoneInfo{Err: err})
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
@ -297,12 +295,12 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
c.traceInfo.tr.LazyLog(&payload{sent: false, msg: reply}, true)
}
t.CloseStream(stream, nil)
if put != nil {
if done != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
done(balancer.DoneInfo{Err: err})
}
return stream.Status().Err()
}

766
cmd/vendor/google.golang.org/grpc/clientconn.go generated vendored
View File

File diff suppressed because it is too large Load Diff

98
cmd/vendor/google.golang.org/grpc/go16.go generated vendored
View File

@ -1,98 +0,0 @@
// +build go1.6,!go1.7
/*
*
* Copyright 2016 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 (
"fmt"
"io"
"net"
"net/http"
"os"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// dialContext connects to the address on the named network.
func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
}
func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
req.Cancel = ctx.Done()
if err := req.Write(conn); err != nil {
return fmt.Errorf("failed to write the HTTP request: %v", err)
}
return nil
}
// toRPCErr converts an error into an error from the status package.
func toRPCErr(err error) error {
if _, ok := status.FromError(err); ok {
return err
}
switch e := err.(type) {
case transport.StreamError:
return status.Error(e.Code, e.Desc)
case transport.ConnectionError:
return status.Error(codes.Unavailable, e.Desc)
default:
switch err {
case context.DeadlineExceeded:
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled:
return status.Error(codes.Canceled, err.Error())
case ErrClientConnClosing:
return status.Error(codes.FailedPrecondition, err.Error())
}
}
return status.Error(codes.Unknown, err.Error())
}
// convertCode converts a standard Go error into its canonical code. Note that
// this is only used to translate the error returned by the server applications.
func convertCode(err error) codes.Code {
switch err {
case nil:
return codes.OK
case io.EOF:
return codes.OutOfRange
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
return codes.FailedPrecondition
case os.ErrInvalid:
return codes.InvalidArgument
case context.Canceled:
return codes.Canceled
case context.DeadlineExceeded:
return codes.DeadlineExceeded
}
switch {
case os.IsExist(err):
return codes.AlreadyExists
case os.IsNotExist(err):
return codes.NotFound
case os.IsPermission(err):
return codes.PermissionDenied
}
return codes.Unknown
}

98
cmd/vendor/google.golang.org/grpc/go17.go generated vendored
View File

@ -1,98 +0,0 @@
// +build go1.7
/*
*
* Copyright 2016 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"
"io"
"net"
"net/http"
"os"
netctx "golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// dialContext connects to the address on the named network.
func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
return (&net.Dialer{}).DialContext(ctx, network, address)
}
func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
req = req.WithContext(ctx)
if err := req.Write(conn); err != nil {
return err
}
return nil
}
// toRPCErr converts an error into an error from the status package.
func toRPCErr(err error) error {
if _, ok := status.FromError(err); ok {
return err
}
switch e := err.(type) {
case transport.StreamError:
return status.Error(e.Code, e.Desc)
case transport.ConnectionError:
return status.Error(codes.Unavailable, e.Desc)
default:
switch err {
case context.DeadlineExceeded, netctx.DeadlineExceeded:
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled, netctx.Canceled:
return status.Error(codes.Canceled, err.Error())
case ErrClientConnClosing:
return status.Error(codes.FailedPrecondition, err.Error())
}
}
return status.Error(codes.Unknown, err.Error())
}
// convertCode converts a standard Go error into its canonical code. Note that
// this is only used to translate the error returned by the server applications.
func convertCode(err error) codes.Code {
switch err {
case nil:
return codes.OK
case io.EOF:
return codes.OutOfRange
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
return codes.FailedPrecondition
case os.ErrInvalid:
return codes.InvalidArgument
case context.Canceled, netctx.Canceled:
return codes.Canceled
case context.DeadlineExceeded, netctx.DeadlineExceeded:
return codes.DeadlineExceeded
}
switch {
case os.IsExist(err):
return codes.AlreadyExists
case os.IsNotExist(err):
return codes.NotFound
case os.IsPermission(err):
return codes.PermissionDenied
}
return codes.Unknown
}

42
cmd/vendor/google.golang.org/grpc/grpclb.go generated vendored
View File

@ -73,7 +73,7 @@ func (x *balanceLoadClientStream) Recv() (*lbmpb.LoadBalanceResponse, error) {
// NewGRPCLBBalancer creates a grpclb load balancer.
func NewGRPCLBBalancer(r naming.Resolver) Balancer {
return &balancer{
return &grpclbBalancer{
r: r,
}
}
@ -96,7 +96,7 @@ type grpclbAddrInfo struct {
dropForLoadBalancing bool
}
type balancer struct {
type grpclbBalancer struct {
r naming.Resolver
target string
mu sync.Mutex
@ -113,7 +113,7 @@ type balancer struct {
clientStats lbmpb.ClientStats
}
func (b *balancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerInfo) error {
func (b *grpclbBalancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerInfo) error {
updates, err := w.Next()
if err != nil {
grpclog.Warningf("grpclb: failed to get next addr update from watcher: %v", err)
@ -187,7 +187,7 @@ func convertDuration(d *lbmpb.Duration) time.Duration {
return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
}
func (b *balancer) processServerList(l *lbmpb.ServerList, seq int) {
func (b *grpclbBalancer) processServerList(l *lbmpb.ServerList, seq int) {
if l == nil {
return
}
@ -230,7 +230,7 @@ func (b *balancer) processServerList(l *lbmpb.ServerList, seq int) {
return
}
func (b *balancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration, done <-chan struct{}) {
func (b *grpclbBalancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration, done <-chan struct{}) {
ticker := time.NewTicker(interval)
defer ticker.Stop()
for {
@ -259,7 +259,7 @@ func (b *balancer) sendLoadReport(s *balanceLoadClientStream, interval time.Dura
}
}
func (b *balancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry bool) {
func (b *grpclbBalancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry bool) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
stream, err := lbc.BalanceLoad(ctx)
@ -332,7 +332,7 @@ func (b *balancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry b
return true
}
func (b *balancer) Start(target string, config BalancerConfig) error {
func (b *grpclbBalancer) Start(target string, config BalancerConfig) error {
b.rand = rand.New(rand.NewSource(time.Now().Unix()))
// TODO: Fall back to the basic direct connection if there is no name resolver.
if b.r == nil {
@ -461,8 +461,11 @@ func (b *balancer) Start(target string, config BalancerConfig) error {
// WithDialer takes a different type of function, so we instead use a special DialOption here.
dopts = append(dopts, func(o *dialOptions) { o.copts.Dialer = dialer })
}
dopts = append(dopts, WithBlock())
ccError = make(chan struct{})
cc, err = Dial(rb.addr, dopts...)
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
cc, err = DialContext(ctx, rb.addr, dopts...)
cancel()
if err != nil {
grpclog.Warningf("grpclb: failed to setup a connection to the remote balancer %v: %v", rb.addr, err)
close(ccError)
@ -488,7 +491,7 @@ func (b *balancer) Start(target string, config BalancerConfig) error {
return nil
}
func (b *balancer) down(addr Address, err error) {
func (b *grpclbBalancer) down(addr Address, err error) {
b.mu.Lock()
defer b.mu.Unlock()
for _, a := range b.addrs {
@ -499,7 +502,7 @@ func (b *balancer) down(addr Address, err error) {
}
}
func (b *balancer) Up(addr Address) func(error) {
func (b *grpclbBalancer) Up(addr Address) func(error) {
b.mu.Lock()
defer b.mu.Unlock()
if b.done {
@ -527,7 +530,7 @@ func (b *balancer) Up(addr Address) func(error) {
}
}
func (b *balancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
func (b *grpclbBalancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
var ch chan struct{}
b.mu.Lock()
if b.done {
@ -597,17 +600,10 @@ func (b *balancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Addre
}
}
if !opts.BlockingWait {
if len(b.addrs) == 0 {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = Errorf(codes.Unavailable, "there is no address available")
return
}
// Returns the next addr on b.addrs for a failfast RPC.
addr = b.addrs[b.next].addr
b.next++
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = Errorf(codes.Unavailable, "there is no address available")
return
}
// Wait on b.waitCh for non-failfast RPCs.
@ -684,11 +680,11 @@ func (b *balancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Addre
}
}
func (b *balancer) Notify() <-chan []Address {
func (b *grpclbBalancer) Notify() <-chan []Address {
return b.addrCh
}
func (b *balancer) Close() error {
func (b *grpclbBalancer) Close() error {
b.mu.Lock()
defer b.mu.Unlock()
if b.done {

2
cmd/vendor/google.golang.org/grpc/naming/go17.go generated vendored
View File

@ -1,4 +1,4 @@
// +build go1.6, !go1.8
// +build go1.7, !go1.8
/*
*

141
cmd/vendor/google.golang.org/grpc/picker_wrapper.go generated vendored Normal file
View File

@ -0,0 +1,141 @@
/*
*
* Copyright 2017 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 (
"sync"
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// pickerWrapper is a wrapper of balancer.Picker. It blocks on certain pick
// actions and unblock when there's a picker update.
type pickerWrapper struct {
mu sync.Mutex
done bool
blockingCh chan struct{}
picker balancer.Picker
}
func newPickerWrapper() *pickerWrapper {
bp := &pickerWrapper{blockingCh: make(chan struct{})}
return bp
}
// updatePicker is called by UpdateBalancerState. It unblocks all blocked pick.
func (bp *pickerWrapper) updatePicker(p balancer.Picker) {
bp.mu.Lock()
if bp.done {
bp.mu.Unlock()
return
}
bp.picker = p
// bp.blockingCh should never be nil.
close(bp.blockingCh)
bp.blockingCh = make(chan struct{})
bp.mu.Unlock()
}
// pick returns the transport that will be used for the RPC.
// It may block in the following cases:
// - there's no picker
// - the current picker returns ErrNoSubConnAvailable
// - the current picker returns other errors and failfast is false.
// - the subConn returned by the current picker is not READY
// When one of these situations happens, pick blocks until the picker gets updated.
func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.PickOptions) (transport.ClientTransport, func(balancer.DoneInfo), error) {
var (
p balancer.Picker
ch chan struct{}
)
for {
bp.mu.Lock()
if bp.done {
bp.mu.Unlock()
return nil, nil, ErrClientConnClosing
}
if bp.picker == nil {
ch = bp.blockingCh
}
if ch == bp.blockingCh {
// This could happen when either:
// - bp.picker is nil (the previous if condition), or
// - has called pick on the current picker.
bp.mu.Unlock()
select {
case <-ctx.Done():
return nil, nil, ctx.Err()
case <-ch:
}
continue
}
ch = bp.blockingCh
p = bp.picker
bp.mu.Unlock()
subConn, put, err := p.Pick(ctx, opts)
if err != nil {
switch err {
case balancer.ErrNoSubConnAvailable:
continue
case balancer.ErrTransientFailure:
if !failfast {
continue
}
return nil, nil, status.Errorf(codes.Unavailable, "%v", err)
default:
// err is some other error.
return nil, nil, toRPCErr(err)
}
}
acw, ok := subConn.(*acBalancerWrapper)
if !ok {
grpclog.Infof("subconn returned from pick is not *acBalancerWrapper")
continue
}
if t, ok := acw.getAddrConn().getReadyTransport(); ok {
return t, put, nil
}
grpclog.Infof("blockingPicker: the picked transport is not ready, loop back to repick")
// If ok == false, ac.state is not READY.
// A valid picker always returns READY subConn. This means the state of ac
// just changed, and picker will be updated shortly.
// continue back to the beginning of the for loop to repick.
}
}
func (bp *pickerWrapper) close() {
bp.mu.Lock()
defer bp.mu.Unlock()
if bp.done {
return
}
bp.done = true
close(bp.blockingCh)
}

95
cmd/vendor/google.golang.org/grpc/pickfirst.go generated vendored Normal file
View File

@ -0,0 +1,95 @@
/*
*
* Copyright 2017 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 (
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
func newPickfirstBuilder() balancer.Builder {
return &pickfirstBuilder{}
}
type pickfirstBuilder struct{}
func (*pickfirstBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
return &pickfirstBalancer{cc: cc}
}
func (*pickfirstBuilder) Name() string {
return "pickfirst"
}
type pickfirstBalancer struct {
cc balancer.ClientConn
sc balancer.SubConn
}
func (b *pickfirstBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
if err != nil {
grpclog.Infof("pickfirstBalancer: HandleResolvedAddrs called with error %v", err)
return
}
if b.sc == nil {
b.sc, err = b.cc.NewSubConn(addrs, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Errorf("pickfirstBalancer: failed to NewSubConn: %v", err)
return
}
b.cc.UpdateBalancerState(connectivity.Idle, &picker{sc: b.sc})
} else {
b.sc.UpdateAddresses(addrs)
}
}
func (b *pickfirstBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
grpclog.Infof("pickfirstBalancer: HandleSubConnStateChange: %p, %v", sc, s)
if b.sc != sc || s == connectivity.Shutdown {
b.sc = nil
return
}
switch s {
case connectivity.Ready, connectivity.Idle:
b.cc.UpdateBalancerState(s, &picker{sc: sc})
case connectivity.Connecting:
b.cc.UpdateBalancerState(s, &picker{err: balancer.ErrNoSubConnAvailable})
case connectivity.TransientFailure:
b.cc.UpdateBalancerState(s, &picker{err: balancer.ErrTransientFailure})
}
}
func (b *pickfirstBalancer) Close() {
}
type picker struct {
err error
sc balancer.SubConn
}
func (p *picker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
if p.err != nil {
return nil, nil, p.err
}
return p.sc, nil, nil
}

3
cmd/vendor/google.golang.org/grpc/proxy.go generated vendored
View File

@ -82,7 +82,8 @@ func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, addr string) (_
Header: map[string][]string{"User-Agent": {grpcUA}},
})
if err := sendHTTPRequest(ctx, req, conn); err != nil {
req = req.WithContext(ctx)
if err := req.Write(conn); err != nil {
return nil, fmt.Errorf("failed to write the HTTP request: %v", err)
}

143
cmd/vendor/google.golang.org/grpc/resolver/resolver.go generated vendored Normal file
View File

@ -0,0 +1,143 @@
/*
*
* Copyright 2017 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 resolver defines APIs for name resolution in gRPC.
// All APIs in this package are experimental.
package resolver
var (
// m is a map from scheme to resolver builder.
m = make(map[string]Builder)
// defaultScheme is the default scheme to use.
defaultScheme string
)
// TODO(bar) install dns resolver in init(){}.
// Register registers the resolver builder to the resolver map.
// b.Scheme will be used as the scheme registered with this builder.
func Register(b Builder) {
m[b.Scheme()] = b
}
// Get returns the resolver builder registered with the given scheme.
// If no builder is register with the scheme, the default scheme will
// be used.
// If the default scheme is not modified, "dns" will be the default
// scheme, and the preinstalled dns resolver will be used.
// If the default scheme is modified, and a resolver is registered with
// the scheme, that resolver will be returned.
// If the default scheme is modified, and no resolver is registered with
// the scheme, nil will be returned.
func Get(scheme string) Builder {
if b, ok := m[scheme]; ok {
return b
}
if b, ok := m[defaultScheme]; ok {
return b
}
return nil
}
// SetDefaultScheme sets the default scheme that will be used.
// The default default scheme is "dns".
func SetDefaultScheme(scheme string) {
defaultScheme = scheme
}
// AddressType indicates the address type returned by name resolution.
type AddressType uint8
const (
// Backend indicates the address is for a backend server.
Backend AddressType = iota
// GRPCLB indicates the address is for a grpclb load balancer.
GRPCLB
)
// Address represents a server the client connects to.
// This is the EXPERIMENTAL API and may be changed or extended in the future.
type Address struct {
// Addr is the server address on which a connection will be established.
Addr string
// Type is the type of this address.
Type AddressType
// ServerName is the name of this address.
// It's the name of the grpc load balancer, which will be used for authentication.
ServerName string
// Metadata is the information associated with Addr, which may be used
// to make load balancing decision.
Metadata interface{}
}
// BuildOption includes additional information for the builder to create
// the resolver.
type BuildOption struct {
}
// ClientConn contains the callbacks for resolver to notify any updates
// to the gRPC ClientConn.
type ClientConn interface {
// NewAddress is called by resolver to notify ClientConn a new list
// of resolved addresses.
// The address list should be the complete list of resolved addresses.
NewAddress(addresses []Address)
// NewServiceConfig is called by resolver to notify ClientConn a new
// service config. The service config should be provided as a json string.
NewServiceConfig(serviceConfig string)
}
// Target represents a target for gRPC, as specified in:
// https://github.com/grpc/grpc/blob/master/doc/naming.md.
type Target struct {
Scheme string
Authority string
Endpoint string
}
// Builder creates a resolver that will be used to watch name resolution updates.
type Builder interface {
// Build creates a new resolver for the given target.
//
// gRPC dial calls Build synchronously, and fails if the returned error is
// not nil.
Build(target Target, cc ClientConn, opts BuildOption) (Resolver, error)
// Scheme returns the scheme supported by this resolver.
// Scheme is defined at https://github.com/grpc/grpc/blob/master/doc/naming.md.
Scheme() string
}
// ResolveNowOption includes additional information for ResolveNow.
type ResolveNowOption struct{}
// Resolver watches for the updates on the specified target.
// Updates include address updates and service config updates.
type Resolver interface {
// ResolveNow will be called by gRPC to try to resolve the target name again.
// It's just a hint, resolver can ignore this if it's not necessary.
ResolveNow(ResolveNowOption)
// Close closes the resolver.
Close()
}
// UnregisterForTesting removes the resolver builder with the given scheme from the
// resolver map.
// This function is for testing only.
func UnregisterForTesting(scheme string) {
delete(m, scheme)
}

139
cmd/vendor/google.golang.org/grpc/resolver_conn_wrapper.go generated vendored Normal file
View File

@ -0,0 +1,139 @@
/*
*
* Copyright 2017 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 (
"strings"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
// ccResolverWrapper is a wrapper on top of cc for resolvers.
// It implements resolver.ClientConnection interface.
type ccResolverWrapper struct {
cc *ClientConn
resolver resolver.Resolver
addrCh chan []resolver.Address
scCh chan string
done chan struct{}
}
// split2 returns the values from strings.SplitN(s, sep, 2).
// If sep is not found, it returns "", s instead.
func split2(s, sep string) (string, string) {
spl := strings.SplitN(s, sep, 2)
if len(spl) < 2 {
return "", s
}
return spl[0], spl[1]
}
// parseTarget splits target into a struct containing scheme, authority and
// endpoint.
func parseTarget(target string) (ret resolver.Target) {
ret.Scheme, ret.Endpoint = split2(target, "://")
ret.Authority, ret.Endpoint = split2(ret.Endpoint, "/")
return ret
}
// newCCResolverWrapper parses cc.target for scheme and gets the resolver
// builder for this scheme. It then builds the resolver and starts the
// monitoring goroutine for it.
//
// This function could return nil, nil, in tests for old behaviors.
// TODO(bar) never return nil, nil when DNS becomes the default resolver.
func newCCResolverWrapper(cc *ClientConn) (*ccResolverWrapper, error) {
target := parseTarget(cc.target)
grpclog.Infof("dialing to target with scheme: %q", target.Scheme)
rb := resolver.Get(target.Scheme)
if rb == nil {
// TODO(bar) return error when DNS becomes the default (implemented and
// registered by DNS package).
grpclog.Infof("could not get resolver for scheme: %q", target.Scheme)
return nil, nil
}
ccr := &ccResolverWrapper{
cc: cc,
addrCh: make(chan []resolver.Address, 1),
scCh: make(chan string, 1),
done: make(chan struct{}),
}
var err error
ccr.resolver, err = rb.Build(target, ccr, resolver.BuildOption{})
if err != nil {
return nil, err
}
go ccr.watcher()
return ccr, nil
}
// watcher processes address updates and service config updates sequencially.
// Otherwise, we need to resolve possible races between address and service
// config (e.g. they specify different balancer types).
func (ccr *ccResolverWrapper) watcher() {
for {
select {
case <-ccr.done:
return
default:
}
select {
case addrs := <-ccr.addrCh:
grpclog.Infof("ccResolverWrapper: sending new addresses to balancer wrapper: %v", addrs)
// TODO(bar switching) this should never be nil. Pickfirst should be default.
if ccr.cc.balancerWrapper != nil {
// TODO(bar switching) create balancer if it's nil?
ccr.cc.balancerWrapper.handleResolvedAddrs(addrs, nil)
}
case sc := <-ccr.scCh:
grpclog.Infof("ccResolverWrapper: got new service config: %v", sc)
case <-ccr.done:
return
}
}
}
func (ccr *ccResolverWrapper) close() {
ccr.resolver.Close()
close(ccr.done)
}
// NewAddress is called by the resolver implemenetion to send addresses to gRPC.
func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) {
select {
case <-ccr.addrCh:
default:
}
ccr.addrCh <- addrs
}
// NewServiceConfig is called by the resolver implemenetion to send service
// configs to gPRC.
func (ccr *ccResolverWrapper) NewServiceConfig(sc string) {
select {
case <-ccr.scCh:
default:
}
ccr.scCh <- sc
}

71
cmd/vendor/google.golang.org/grpc/rpc_util.go generated vendored
View File

@ -21,10 +21,12 @@ package grpc
import (
"bytes"
"compress/gzip"
stdctx "context"
"encoding/binary"
"io"
"io/ioutil"
"math"
"os"
"sync"
"time"
@ -132,7 +134,9 @@ type callInfo struct {
creds credentials.PerRPCCredentials
}
var defaultCallInfo = callInfo{failFast: true}
func defaultCallInfo() *callInfo {
return &callInfo{failFast: true}
}
// CallOption configures a Call before it starts or extracts information from
// a Call after it completes.
@ -384,14 +388,15 @@ func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{
}
type rpcInfo struct {
failfast bool
bytesSent bool
bytesReceived bool
}
type rpcInfoContextKey struct{}
func newContextWithRPCInfo(ctx context.Context) context.Context {
return context.WithValue(ctx, rpcInfoContextKey{}, &rpcInfo{})
func newContextWithRPCInfo(ctx context.Context, failfast bool) context.Context {
return context.WithValue(ctx, rpcInfoContextKey{}, &rpcInfo{failfast: failfast})
}
func rpcInfoFromContext(ctx context.Context) (s *rpcInfo, ok bool) {
@ -401,11 +406,63 @@ func rpcInfoFromContext(ctx context.Context) (s *rpcInfo, ok bool) {
func updateRPCInfoInContext(ctx context.Context, s rpcInfo) {
if ss, ok := rpcInfoFromContext(ctx); ok {
*ss = s
ss.bytesReceived = s.bytesReceived
ss.bytesSent = s.bytesSent
}
return
}
// toRPCErr converts an error into an error from the status package.
func toRPCErr(err error) error {
if _, ok := status.FromError(err); ok {
return err
}
switch e := err.(type) {
case transport.StreamError:
return status.Error(e.Code, e.Desc)
case transport.ConnectionError:
return status.Error(codes.Unavailable, e.Desc)
default:
switch err {
case context.DeadlineExceeded, stdctx.DeadlineExceeded:
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled, stdctx.Canceled:
return status.Error(codes.Canceled, err.Error())
case ErrClientConnClosing:
return status.Error(codes.FailedPrecondition, err.Error())
}
}
return status.Error(codes.Unknown, err.Error())
}
// convertCode converts a standard Go error into its canonical code. Note that
// this is only used to translate the error returned by the server applications.
func convertCode(err error) codes.Code {
switch err {
case nil:
return codes.OK
case io.EOF:
return codes.OutOfRange
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
return codes.FailedPrecondition
case os.ErrInvalid:
return codes.InvalidArgument
case context.Canceled, stdctx.Canceled:
return codes.Canceled
case context.DeadlineExceeded, stdctx.DeadlineExceeded:
return codes.DeadlineExceeded
}
switch {
case os.IsExist(err):
return codes.AlreadyExists
case os.IsNotExist(err):
return codes.NotFound
case os.IsPermission(err):
return codes.PermissionDenied
}
return codes.Unknown
}
// Code returns the error code for err if it was produced by the rpc system.
// Otherwise, it returns codes.Unknown.
//
@ -452,7 +509,7 @@ type MethodConfig struct {
// MaxReqSize is the maximum allowed payload size for an individual request in a
// stream (client->server) in bytes. The size which is measured is the serialized
// payload after per-message compression (but before stream compression) in bytes.
// The actual value used is the minumum of the value specified here and the value set
// The actual value used is the minimum of the value specified here and the value set
// by the application via the gRPC client API. If either one is not set, then the other
// will be used. If neither is set, then the built-in default is used.
MaxReqSize *int
@ -497,7 +554,7 @@ func getMaxSize(mcMax, doptMax *int, defaultVal int) *int {
// SupportPackageIsVersion3 is referenced from generated protocol buffer files.
// The latest support package version is 4.
// SupportPackageIsVersion3 is kept for compability. It will be removed in the
// SupportPackageIsVersion3 is kept for compatibility. It will be removed in the
// next support package version update.
const SupportPackageIsVersion3 = true
@ -510,6 +567,6 @@ const SupportPackageIsVersion3 = true
const SupportPackageIsVersion4 = true
// Version is the current grpc version.
const Version = "1.6.0"
const Version = "1.7.2"
const grpcUA = "grpc-go/" + Version

25
cmd/vendor/google.golang.org/grpc/server.go generated vendored
View File

@ -116,6 +116,8 @@ type options struct {
keepalivePolicy keepalive.EnforcementPolicy
initialWindowSize int32
initialConnWindowSize int32
writeBufferSize int
readBufferSize int
}
var defaultServerOptions = options{
@ -126,6 +128,22 @@ var defaultServerOptions = options{
// A ServerOption sets options such as credentials, codec and keepalive parameters, etc.
type ServerOption func(*options)
// WriteBufferSize lets you set the size of write buffer, this determines how much data can be batched
// before doing a write on the wire.
func WriteBufferSize(s int) ServerOption {
return func(o *options) {
o.writeBufferSize = s
}
}
// ReadBufferSize lets you set the size of read buffer, this determines how much data can be read at most
// for one read syscall.
func ReadBufferSize(s int) ServerOption {
return func(o *options) {
o.readBufferSize = s
}
}
// InitialWindowSize returns a ServerOption that sets window size for stream.
// The lower bound for window size is 64K and any value smaller than that will be ignored.
func InitialWindowSize(s int32) ServerOption {
@ -260,7 +278,7 @@ func StatsHandler(h stats.Handler) ServerOption {
// handler that will be invoked instead of returning the "unimplemented" gRPC
// error whenever a request is received for an unregistered service or method.
// The handling function has full access to the Context of the request and the
// stream, and the invocation passes through interceptors.
// stream, and the invocation bypasses interceptors.
func UnknownServiceHandler(streamHandler StreamHandler) ServerOption {
return func(o *options) {
o.unknownStreamDesc = &StreamDesc{
@ -524,6 +542,8 @@ func (s *Server) serveHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo)
KeepalivePolicy: s.opts.keepalivePolicy,
InitialWindowSize: s.opts.initialWindowSize,
InitialConnWindowSize: s.opts.initialConnWindowSize,
WriteBufferSize: s.opts.writeBufferSize,
ReadBufferSize: s.opts.readBufferSize,
}
st, err := transport.NewServerTransport("http2", c, config)
if err != nil {
@ -891,9 +911,6 @@ func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transp
trInfo: trInfo,
statsHandler: sh,
}
if ss.cp != nil {
ss.cbuf = new(bytes.Buffer)
}
if trInfo != nil {
trInfo.tr.LazyLog(&trInfo.firstLine, false)
defer func() {

10
cmd/vendor/google.golang.org/grpc/stats/stats.go generated vendored
View File

@ -135,8 +135,6 @@ func (s *OutPayload) isRPCStats() {}
type OutHeader struct {
// Client is true if this OutHeader is from client side.
Client bool
// WireLength is the wire length of header.
WireLength int
// The following fields are valid only if Client is true.
// FullMethod is the full RPC method string, i.e., /package.service/method.
@ -220,7 +218,7 @@ type outgoingTagsKey struct{}
// the outgoing RPC with the header grpc-tags-bin. Subsequent calls to
// SetTags will overwrite the values from earlier calls.
//
// NOTE: this is provided only for backward compatibilty with existing clients
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.
@ -230,7 +228,7 @@ func SetTags(ctx context.Context, b []byte) context.Context {
// Tags returns the tags from the context for the inbound RPC.
//
// NOTE: this is provided only for backward compatibilty with existing clients
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.
@ -262,7 +260,7 @@ type outgoingTraceKey struct{}
// the outgoing RPC with the header grpc-trace-bin. Subsequent calls to
// SetTrace will overwrite the values from earlier calls.
//
// NOTE: this is provided only for backward compatibilty with existing clients
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.
@ -272,7 +270,7 @@ func SetTrace(ctx context.Context, b []byte) context.Context {
// Trace returns the trace from the context for the inbound RPC.
//
// NOTE: this is provided only for backward compatibilty with existing clients
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.

61
cmd/vendor/google.golang.org/grpc/stream.go generated vendored
View File

@ -27,6 +27,7 @@ import (
"golang.org/x/net/context"
"golang.org/x/net/trace"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
@ -106,10 +107,10 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
var (
t transport.ClientTransport
s *transport.Stream
put func()
done func(balancer.DoneInfo)
cancel context.CancelFunc
)
c := defaultCallInfo
c := defaultCallInfo()
mc := cc.GetMethodConfig(method)
if mc.WaitForReady != nil {
c.failFast = !*mc.WaitForReady
@ -126,7 +127,7 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
opts = append(cc.dopts.callOptions, opts...)
for _, o := range opts {
if err := o.before(&c); err != nil {
if err := o.before(c); err != nil {
return nil, toRPCErr(err)
}
}
@ -167,7 +168,7 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
}
}()
}
ctx = newContextWithRPCInfo(ctx)
ctx = newContextWithRPCInfo(ctx, c.failFast)
sh := cc.dopts.copts.StatsHandler
if sh != nil {
ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
@ -188,11 +189,8 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
}
}()
}
gopts := BalancerGetOptions{
BlockingWait: !c.failFast,
}
for {
t, put, err = cc.getTransport(ctx, gopts)
t, done, err = cc.getTransport(ctx, c.failFast)
if err != nil {
// TODO(zhaoq): Probably revisit the error handling.
if _, ok := status.FromError(err); ok {
@ -210,15 +208,15 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
s, err = t.NewStream(ctx, callHdr)
if err != nil {
if _, ok := err.(transport.ConnectionError); ok && put != nil {
if _, ok := err.(transport.ConnectionError); ok && done != nil {
// If error is connection error, transport was sending data on wire,
// and we are not sure if anything has been sent on wire.
// If error is not connection error, we are sure nothing has been sent.
updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
}
if put != nil {
put()
put = nil
if done != nil {
done(balancer.DoneInfo{Err: err})
done = nil
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
@ -240,10 +238,10 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
dc: cc.dopts.dc,
cancel: cancel,
put: put,
t: t,
s: s,
p: &parser{r: s},
done: done,
t: t,
s: s,
p: &parser{r: s},
tracing: EnableTracing,
trInfo: trInfo,
@ -251,9 +249,6 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
statsCtx: ctx,
statsHandler: cc.dopts.copts.StatsHandler,
}
if cc.dopts.cp != nil {
cs.cbuf = new(bytes.Buffer)
}
// Listen on ctx.Done() to detect cancellation and s.Done() to detect normal termination
// when there is no pending I/O operations on this stream.
go func() {
@ -283,21 +278,20 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
// clientStream implements a client side Stream.
type clientStream struct {
opts []CallOption
c callInfo
c *callInfo
t transport.ClientTransport
s *transport.Stream
p *parser
desc *StreamDesc
codec Codec
cp Compressor
cbuf *bytes.Buffer
dc Decompressor
cancel context.CancelFunc
tracing bool // set to EnableTracing when the clientStream is created.
mu sync.Mutex
put func()
done func(balancer.DoneInfo)
closed bool
finished bool
// trInfo.tr is set when the clientStream is created (if EnableTracing is true),
@ -367,12 +361,7 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
Client: true,
}
}
hdr, data, err := encode(cs.codec, m, cs.cp, cs.cbuf, outPayload)
defer func() {
if cs.cbuf != nil {
cs.cbuf.Reset()
}
}()
hdr, data, err := encode(cs.codec, m, cs.cp, bytes.NewBuffer([]byte{}), outPayload)
if err != nil {
return err
}
@ -494,15 +483,15 @@ func (cs *clientStream) finish(err error) {
}
}()
for _, o := range cs.opts {
o.after(&cs.c)
o.after(cs.c)
}
if cs.put != nil {
if cs.done != nil {
updateRPCInfoInContext(cs.s.Context(), rpcInfo{
bytesSent: cs.s.BytesSent(),
bytesReceived: cs.s.BytesReceived(),
})
cs.put()
cs.put = nil
cs.done(balancer.DoneInfo{Err: err})
cs.done = nil
}
if cs.statsHandler != nil {
end := &stats.End{
@ -557,7 +546,6 @@ type serverStream struct {
codec Codec
cp Compressor
dc Decompressor
cbuf *bytes.Buffer
maxReceiveMessageSize int
maxSendMessageSize int
trInfo *traceInfo
@ -613,12 +601,7 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
if ss.statsHandler != nil {
outPayload = &stats.OutPayload{}
}
hdr, data, err := encode(ss.codec, m, ss.cp, ss.cbuf, outPayload)
defer func() {
if ss.cbuf != nil {
ss.cbuf.Reset()
}
}()
hdr, data, err := encode(ss.codec, m, ss.cp, bytes.NewBuffer([]byte{}), outPayload)
if err != nil {
return err
}

15
cmd/vendor/google.golang.org/grpc/trace.go generated vendored
View File

@ -31,7 +31,7 @@ import (
// EnableTracing controls whether to trace RPCs using the golang.org/x/net/trace package.
// This should only be set before any RPCs are sent or received by this program.
var EnableTracing = true
var EnableTracing bool
// methodFamily returns the trace family for the given method.
// It turns "/pkg.Service/GetFoo" into "pkg.Service".
@ -76,6 +76,15 @@ func (f *firstLine) String() string {
return line.String()
}
const truncateSize = 100
func truncate(x string, l int) string {
if l > len(x) {
return x
}
return x[:l]
}
// payload represents an RPC request or response payload.
type payload struct {
sent bool // whether this is an outgoing payload
@ -85,9 +94,9 @@ type payload struct {
func (p payload) String() string {
if p.sent {
return fmt.Sprintf("sent: %v", p.msg)
return truncate(fmt.Sprintf("sent: %v", p.msg), truncateSize)
}
return fmt.Sprintf("recv: %v", p.msg)
return truncate(fmt.Sprintf("recv: %v", p.msg), truncateSize)
}
type fmtStringer struct {

6
cmd/vendor/google.golang.org/grpc/transport/bdp_estimator.go generated vendored
View File

@ -59,7 +59,7 @@ type bdpEstimator struct {
sample uint32
// bwMax is the maximum bandwidth noted so far (bytes/sec).
bwMax float64
// bool to keep track of the begining of a new measurement cycle.
// bool to keep track of the beginning of a new measurement cycle.
isSent bool
// Callback to update the window sizes.
updateFlowControl func(n uint32)
@ -70,7 +70,7 @@ type bdpEstimator struct {
}
// timesnap registers the time bdp ping was sent out so that
// network rtt can be calculated when its ack is recieved.
// network rtt can be calculated when its ack is received.
// It is called (by controller) when the bdpPing is
// being written on the wire.
func (b *bdpEstimator) timesnap(d [8]byte) {
@ -119,7 +119,7 @@ func (b *bdpEstimator) calculate(d [8]byte) {
b.rtt += (rttSample - b.rtt) * float64(alpha)
}
b.isSent = false
// The number of bytes accumalated so far in the sample is smaller
// The number of bytes accumulated so far in the sample is smaller
// than or equal to 1.5 times the real BDP on a saturated connection.
bwCurrent := float64(b.sample) / (b.rtt * float64(1.5))
if bwCurrent > b.bwMax {

71
cmd/vendor/google.golang.org/grpc/transport/control.go generated vendored
View File

@ -22,9 +22,11 @@ import (
"fmt"
"math"
"sync"
"sync/atomic"
"time"
"golang.org/x/net/http2"
"golang.org/x/net/http2/hpack"
)
const (
@ -44,15 +46,44 @@ const (
defaultKeepalivePolicyMinTime = time.Duration(5 * time.Minute)
// max window limit set by HTTP2 Specs.
maxWindowSize = math.MaxInt32
// defaultLocalSendQuota sets is default value for number of data
// bytes that each stream can schedule before some of it being
// flushed out.
defaultLocalSendQuota = 64 * 1024
)
// The following defines various control items which could flow through
// the control buffer of transport. They represent different aspects of
// control tasks, e.g., flow control, settings, streaming resetting, etc.
type headerFrame struct {
streamID uint32
hf []hpack.HeaderField
endStream bool
}
func (*headerFrame) item() {}
type continuationFrame struct {
streamID uint32
endHeaders bool
headerBlockFragment []byte
}
type dataFrame struct {
streamID uint32
endStream bool
d []byte
f func()
}
func (*dataFrame) item() {}
func (*continuationFrame) item() {}
type windowUpdate struct {
streamID uint32
increment uint32
flush bool
}
func (*windowUpdate) item() {}
@ -97,8 +128,9 @@ func (*ping) item() {}
type quotaPool struct {
c chan int
mu sync.Mutex
quota int
mu sync.Mutex
version uint32
quota int
}
// newQuotaPool creates a quotaPool which has quota q available to consume.
@ -119,6 +151,10 @@ func newQuotaPool(q int) *quotaPool {
func (qb *quotaPool) add(v int) {
qb.mu.Lock()
defer qb.mu.Unlock()
qb.lockedAdd(v)
}
func (qb *quotaPool) lockedAdd(v int) {
select {
case n := <-qb.c:
qb.quota += n
@ -139,6 +175,35 @@ func (qb *quotaPool) add(v int) {
}
}
func (qb *quotaPool) addAndUpdate(v int) {
qb.mu.Lock()
defer qb.mu.Unlock()
qb.lockedAdd(v)
// Update the version only after having added to the quota
// so that if acquireWithVesrion sees the new vesrion it is
// guaranteed to have seen the updated quota.
// Also, still keep this inside of the lock, so that when
// compareAndExecute is processing, this function doesn't
// get executed partially (quota gets updated but the version
// doesn't).
atomic.AddUint32(&(qb.version), 1)
}
func (qb *quotaPool) acquireWithVersion() (<-chan int, uint32) {
return qb.c, atomic.LoadUint32(&(qb.version))
}
func (qb *quotaPool) compareAndExecute(version uint32, success, failure func()) bool {
qb.mu.Lock()
defer qb.mu.Unlock()
if version == atomic.LoadUint32(&(qb.version)) {
success()
return true
}
failure()
return false
}
// acquire returns the channel on which available quota amounts are sent.
func (qb *quotaPool) acquire() <-chan int {
return qb.c

45
cmd/vendor/google.golang.org/grpc/transport/go16.go generated vendored
View File

@ -1,45 +0,0 @@
// +build go1.6,!go1.7
/*
*
* Copyright 2016 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 transport
import (
"net"
"google.golang.org/grpc/codes"
"golang.org/x/net/context"
)
// dialContext connects to the address on the named network.
func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
}
// ContextErr converts the error from context package into a StreamError.
func ContextErr(err error) StreamError {
switch err {
case context.DeadlineExceeded:
return streamErrorf(codes.DeadlineExceeded, "%v", err)
case context.Canceled:
return streamErrorf(codes.Canceled, "%v", err)
}
return streamErrorf(codes.Internal, "Unexpected error from context packet: %v", err)
}

46
cmd/vendor/google.golang.org/grpc/transport/go17.go generated vendored
View File

@ -1,46 +0,0 @@
// +build go1.7
/*
*
* Copyright 2016 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 transport
import (
"context"
"net"
"google.golang.org/grpc/codes"
netctx "golang.org/x/net/context"
)
// dialContext connects to the address on the named network.
func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
return (&net.Dialer{}).DialContext(ctx, network, address)
}
// ContextErr converts the error from context package into a StreamError.
func ContextErr(err error) StreamError {
switch err {
case context.DeadlineExceeded, netctx.DeadlineExceeded:
return streamErrorf(codes.DeadlineExceeded, "%v", err)
case context.Canceled, netctx.Canceled:
return streamErrorf(codes.Canceled, "%v", err)
}
return streamErrorf(codes.Internal, "Unexpected error from context packet: %v", err)
}

5
cmd/vendor/google.golang.org/grpc/transport/handler_server.go generated vendored
View File

@ -173,7 +173,6 @@ func (ht *serverHandlerTransport) do(fn func()) error {
case <-ht.closedCh:
return ErrConnClosing
}
}
}
@ -183,6 +182,7 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
ht.mu.Unlock()
return nil
}
ht.streamDone = true
ht.mu.Unlock()
err := ht.do(func() {
ht.writeCommonHeaders(s)
@ -223,9 +223,6 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
}
})
close(ht.writes)
ht.mu.Lock()
ht.streamDone = true
ht.mu.Unlock()
return err
}

606
cmd/vendor/google.golang.org/grpc/transport/http2_client.go generated vendored
View File

@ -43,6 +43,7 @@ import (
// http2Client implements the ClientTransport interface with HTTP2.
type http2Client struct {
ctx context.Context
cancel context.CancelFunc
target string // server name/addr
userAgent string
md interface{}
@ -52,17 +53,6 @@ type http2Client struct {
authInfo credentials.AuthInfo // auth info about the connection
nextID uint32 // the next stream ID to be used
// writableChan synchronizes write access to the transport.
// A writer acquires the write lock by sending a value on writableChan
// and releases it by receiving from writableChan.
writableChan chan int
// shutdownChan is closed when Close is called.
// Blocking operations should select on shutdownChan to avoid
// blocking forever after Close.
// TODO(zhaoq): Maybe have a channel context?
shutdownChan chan struct{}
// errorChan is closed to notify the I/O error to the caller.
errorChan chan struct{}
// goAway is closed to notify the upper layer (i.e., addrConn.transportMonitor)
// that the server sent GoAway on this transport.
goAway chan struct{}
@ -119,7 +109,7 @@ func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error
if fn != nil {
return fn(ctx, addr)
}
return dialContext(ctx, "tcp", addr)
return (&net.Dialer{}).DialContext(ctx, "tcp", addr)
}
func isTemporary(err error) bool {
@ -153,9 +143,18 @@ func isTemporary(err error) bool {
// newHTTP2Client constructs a connected ClientTransport to addr based on HTTP2
// and starts to receive messages on it. Non-nil error returns if construction
// fails.
func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (_ ClientTransport, err error) {
func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions, timeout time.Duration) (_ ClientTransport, err error) {
scheme := "http"
conn, err := dial(ctx, opts.Dialer, addr.Addr)
ctx, cancel := context.WithCancel(ctx)
connectCtx, connectCancel := context.WithTimeout(ctx, timeout)
defer func() {
connectCancel()
if err != nil {
cancel()
}
}()
conn, err := dial(connectCtx, opts.Dialer, addr.Addr)
if err != nil {
if opts.FailOnNonTempDialError {
return nil, connectionErrorf(isTemporary(err), err, "transport: error while dialing: %v", err)
@ -174,7 +173,7 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
)
if creds := opts.TransportCredentials; creds != nil {
scheme = "https"
conn, authInfo, err = creds.ClientHandshake(ctx, addr.Addr, conn)
conn, authInfo, err = creds.ClientHandshake(connectCtx, addr.Addr, conn)
if err != nil {
// Credentials handshake errors are typically considered permanent
// to avoid retrying on e.g. bad certificates.
@ -198,8 +197,17 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
dynamicWindow = false
}
var buf bytes.Buffer
writeBufSize := defaultWriteBufSize
if opts.WriteBufferSize > 0 {
writeBufSize = opts.WriteBufferSize
}
readBufSize := defaultReadBufSize
if opts.ReadBufferSize > 0 {
readBufSize = opts.ReadBufferSize
}
t := &http2Client{
ctx: ctx,
cancel: cancel,
target: addr.Addr,
userAgent: opts.UserAgent,
md: addr.Metadata,
@ -209,14 +217,11 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
authInfo: authInfo,
// The client initiated stream id is odd starting from 1.
nextID: 1,
writableChan: make(chan int, 1),
shutdownChan: make(chan struct{}),
errorChan: make(chan struct{}),
goAway: make(chan struct{}),
awakenKeepalive: make(chan struct{}, 1),
framer: newFramer(conn),
hBuf: &buf,
hEnc: hpack.NewEncoder(&buf),
framer: newFramer(conn, writeBufSize, readBufSize),
controlBuf: newControlBuffer(),
fc: &inFlow{limit: uint32(icwz)},
sendQuotaPool: newQuotaPool(defaultWindowSize),
@ -270,12 +275,12 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
return nil, connectionErrorf(true, err, "transport: preface mismatch, wrote %d bytes; want %d", n, len(clientPreface))
}
if t.initialWindowSize != defaultWindowSize {
err = t.framer.writeSettings(true, http2.Setting{
err = t.framer.fr.WriteSettings(http2.Setting{
ID: http2.SettingInitialWindowSize,
Val: uint32(t.initialWindowSize),
})
} else {
err = t.framer.writeSettings(true)
err = t.framer.fr.WriteSettings()
}
if err != nil {
t.Close()
@ -283,31 +288,35 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
}
// Adjust the connection flow control window if needed.
if delta := uint32(icwz - defaultWindowSize); delta > 0 {
if err := t.framer.writeWindowUpdate(true, 0, delta); err != nil {
if err := t.framer.fr.WriteWindowUpdate(0, delta); err != nil {
t.Close()
return nil, connectionErrorf(true, err, "transport: failed to write window update: %v", err)
}
}
go t.controller()
t.framer.writer.Flush()
go func() {
loopyWriter(t.ctx, t.controlBuf, t.itemHandler)
t.Close()
}()
if t.kp.Time != infinity {
go t.keepalive()
}
t.writableChan <- 0
return t, nil
}
func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream {
// TODO(zhaoq): Handle uint32 overflow of Stream.id.
s := &Stream{
id: t.nextID,
done: make(chan struct{}),
goAway: make(chan struct{}),
method: callHdr.Method,
sendCompress: callHdr.SendCompress,
buf: newRecvBuffer(),
fc: &inFlow{limit: uint32(t.initialWindowSize)},
sendQuotaPool: newQuotaPool(int(t.streamSendQuota)),
headerChan: make(chan struct{}),
id: t.nextID,
done: make(chan struct{}),
goAway: make(chan struct{}),
method: callHdr.Method,
sendCompress: callHdr.SendCompress,
buf: newRecvBuffer(),
fc: &inFlow{limit: uint32(t.initialWindowSize)},
sendQuotaPool: newQuotaPool(int(t.streamSendQuota)),
localSendQuota: newQuotaPool(defaultLocalSendQuota),
headerChan: make(chan struct{}),
}
t.nextID += 2
s.requestRead = func(n int) {
@ -368,13 +377,13 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
authData[k] = v
}
}
callAuthData := make(map[string]string)
callAuthData := map[string]string{}
// Check if credentials.PerRPCCredentials were provided via call options.
// Note: if these credentials are provided both via dial options and call
// options, then both sets of credentials will be applied.
if callCreds := callHdr.Creds; callCreds != nil {
if !t.isSecure && callCreds.RequireTransportSecurity() {
return nil, streamErrorf(codes.Unauthenticated, "transport: cannot send secure credentials on an insecure conneciton")
return nil, streamErrorf(codes.Unauthenticated, "transport: cannot send secure credentials on an insecure connection")
}
data, err := callCreds.GetRequestMetadata(ctx, audience)
if err != nil {
@ -400,7 +409,7 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
return nil, ErrConnClosing
}
t.mu.Unlock()
sq, err := wait(ctx, nil, nil, t.shutdownChan, t.streamsQuota.acquire())
sq, err := wait(ctx, t.ctx, nil, nil, t.streamsQuota.acquire())
if err != nil {
return nil, err
}
@ -408,19 +417,66 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
if sq > 1 {
t.streamsQuota.add(sq - 1)
}
if _, err := wait(ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
// Return the quota back now because there is no stream returned to the caller.
if _, ok := err.(StreamError); ok {
t.streamsQuota.add(1)
// TODO(mmukhi): Benchmark if the perfomance gets better if count the metadata and other header fields
// first and create a slice of that exact size.
// Make the slice of certain predictable size to reduce allocations made by append.
hfLen := 7 // :method, :scheme, :path, :authority, content-type, user-agent, te
hfLen += len(authData) + len(callAuthData)
headerFields := make([]hpack.HeaderField, 0, hfLen)
headerFields = append(headerFields, hpack.HeaderField{Name: ":method", Value: "POST"})
headerFields = append(headerFields, hpack.HeaderField{Name: ":scheme", Value: t.scheme})
headerFields = append(headerFields, hpack.HeaderField{Name: ":path", Value: callHdr.Method})
headerFields = append(headerFields, hpack.HeaderField{Name: ":authority", Value: callHdr.Host})
headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
headerFields = append(headerFields, hpack.HeaderField{Name: "user-agent", Value: t.userAgent})
headerFields = append(headerFields, hpack.HeaderField{Name: "te", Value: "trailers"})
if callHdr.SendCompress != "" {
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress})
}
if dl, ok := ctx.Deadline(); ok {
// Send out timeout regardless its value. The server can detect timeout context by itself.
// TODO(mmukhi): Perhaps this field should be updated when actually writing out to the wire.
timeout := dl.Sub(time.Now())
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-timeout", Value: encodeTimeout(timeout)})
}
for k, v := range authData {
headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
for k, v := range callAuthData {
headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
if b := stats.OutgoingTags(ctx); b != nil {
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-tags-bin", Value: encodeBinHeader(b)})
}
if b := stats.OutgoingTrace(ctx); b != nil {
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-trace-bin", Value: encodeBinHeader(b)})
}
if md, ok := metadata.FromOutgoingContext(ctx); ok {
for k, vv := range md {
// HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set.
if isReservedHeader(k) {
continue
}
for _, v := range vv {
headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
}
if md, ok := t.md.(*metadata.MD); ok {
for k, vv := range *md {
if isReservedHeader(k) {
continue
}
for _, v := range vv {
headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
return nil, err
}
t.mu.Lock()
if t.state == draining {
t.mu.Unlock()
t.streamsQuota.add(1)
// Need to make t writable again so that the rpc in flight can still proceed.
t.writableChan <- 0
return nil, ErrStreamDrain
}
if t.state != reachable {
@ -434,7 +490,7 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
if len(t.activeStreams) == 1 {
select {
case t.awakenKeepalive <- struct{}{}:
t.framer.writePing(false, false, [8]byte{})
t.controlBuf.put(&ping{data: [8]byte{}})
// 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.
@ -442,102 +498,13 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
default:
}
}
t.controlBuf.put(&headerFrame{
streamID: s.id,
hf: headerFields,
endStream: false,
})
t.mu.Unlock()
// HPACK encodes various headers. Note that once WriteField(...) is
// called, the corresponding headers/continuation frame has to be sent
// because hpack.Encoder is stateful.
t.hBuf.Reset()
t.hEnc.WriteField(hpack.HeaderField{Name: ":method", Value: "POST"})
t.hEnc.WriteField(hpack.HeaderField{Name: ":scheme", Value: t.scheme})
t.hEnc.WriteField(hpack.HeaderField{Name: ":path", Value: callHdr.Method})
t.hEnc.WriteField(hpack.HeaderField{Name: ":authority", Value: callHdr.Host})
t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
t.hEnc.WriteField(hpack.HeaderField{Name: "user-agent", Value: t.userAgent})
t.hEnc.WriteField(hpack.HeaderField{Name: "te", Value: "trailers"})
if callHdr.SendCompress != "" {
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress})
}
if dl, ok := ctx.Deadline(); ok {
// Send out timeout regardless its value. The server can detect timeout context by itself.
timeout := dl.Sub(time.Now())
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-timeout", Value: encodeTimeout(timeout)})
}
for k, v := range authData {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
for k, v := range callAuthData {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
var (
endHeaders bool
)
if b := stats.OutgoingTags(ctx); b != nil {
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-tags-bin", Value: encodeBinHeader(b)})
}
if b := stats.OutgoingTrace(ctx); b != nil {
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-trace-bin", Value: encodeBinHeader(b)})
}
if md, ok := metadata.FromOutgoingContext(ctx); ok {
for k, vv := range md {
// HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set.
if isReservedHeader(k) {
continue
}
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
}
if md, ok := t.md.(*metadata.MD); ok {
for k, vv := range *md {
if isReservedHeader(k) {
continue
}
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
}
first := true
bufLen := t.hBuf.Len()
// Sends the headers in a single batch even when they span multiple frames.
for !endHeaders {
size := t.hBuf.Len()
if size > http2MaxFrameLen {
size = http2MaxFrameLen
} else {
endHeaders = true
}
var flush bool
if callHdr.Flush && endHeaders {
flush = true
}
if first {
// Sends a HeadersFrame to server to start a new stream.
p := http2.HeadersFrameParam{
StreamID: s.id,
BlockFragment: t.hBuf.Next(size),
EndStream: false,
EndHeaders: endHeaders,
}
// Do a force flush for the buffered frames iff it is the last headers frame
// and there is header metadata to be sent. Otherwise, there is flushing until
// the corresponding data frame is written.
err = t.framer.writeHeaders(flush, p)
first = false
} else {
// Sends Continuation frames for the leftover headers.
err = t.framer.writeContinuation(flush, s.id, endHeaders, t.hBuf.Next(size))
}
if err != nil {
t.notifyError(err)
return nil, connectionErrorf(true, err, "transport: %v", err)
}
}
s.mu.Lock()
s.bytesSent = true
s.mu.Unlock()
@ -545,7 +512,6 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
if t.statsHandler != nil {
outHeader := &stats.OutHeader{
Client: true,
WireLength: bufLen,
FullMethod: callHdr.Method,
RemoteAddr: t.remoteAddr,
LocalAddr: t.localAddr,
@ -553,7 +519,6 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
}
t.statsHandler.HandleRPC(s.ctx, outHeader)
}
t.writableChan <- 0
return s, nil
}
@ -623,12 +588,9 @@ func (t *http2Client) Close() (err error) {
t.mu.Unlock()
return
}
if t.state == reachable || t.state == draining {
close(t.errorChan)
}
t.state = closing
t.mu.Unlock()
close(t.shutdownChan)
t.cancel()
err = t.conn.Close()
t.mu.Lock()
streams := t.activeStreams
@ -650,23 +612,18 @@ func (t *http2Client) Close() (err error) {
}
t.statsHandler.HandleConn(t.ctx, connEnd)
}
return
return err
}
// GracefulClose sets the state to draining, which prevents new streams from
// being created and causes the transport to be closed when the last active
// stream is closed. If there are no active streams, the transport is closed
// immediately. This does nothing if the transport is already draining or
// closing.
func (t *http2Client) GracefulClose() error {
t.mu.Lock()
switch t.state {
case unreachable:
// The server may close the connection concurrently. t is not available for
// any streams. Close it now.
t.mu.Unlock()
t.Close()
return nil
case closing:
t.mu.Unlock()
return nil
}
if t.state == draining {
case closing, draining:
t.mu.Unlock()
return nil
}
@ -681,32 +638,38 @@ func (t *http2Client) GracefulClose() error {
// Write formats the data into HTTP2 data frame(s) and sends it out. The caller
// should proceed only if Write returns nil.
// TODO(zhaoq): opts.Delay is ignored in this implementation. Support it later
// if it improves the performance.
func (t *http2Client) Write(s *Stream, hdr []byte, data []byte, opts *Options) error {
secondStart := http2MaxFrameLen - len(hdr)%http2MaxFrameLen
if len(data) < secondStart {
secondStart = len(data)
select {
case <-s.ctx.Done():
return ContextErr(s.ctx.Err())
case <-t.ctx.Done():
return ErrConnClosing
default:
}
hdr = append(hdr, data[:secondStart]...)
data = data[secondStart:]
isLastSlice := (len(data) == 0)
r := bytes.NewBuffer(hdr)
var (
p []byte
oqv uint32
)
for {
oqv = atomic.LoadUint32(&t.outQuotaVersion)
if r.Len() > 0 || p != nil {
if hdr == nil && data == nil && opts.Last {
// stream.CloseSend uses this to send an empty frame with endStream=True
t.controlBuf.put(&dataFrame{streamID: s.id, endStream: true, f: func() {}})
return nil
}
// Add data to header frame so that we can equally distribute data across frames.
emptyLen := http2MaxFrameLen - len(hdr)
if emptyLen > len(data) {
emptyLen = len(data)
}
hdr = append(hdr, data[:emptyLen]...)
data = data[emptyLen:]
for idx, r := range [][]byte{hdr, data} {
for len(r) > 0 {
size := http2MaxFrameLen
// Wait until the stream has some quota to send the data.
sq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, s.sendQuotaPool.acquire())
quotaChan, quotaVer := s.sendQuotaPool.acquireWithVersion()
sq, err := wait(s.ctx, t.ctx, s.done, s.goAway, quotaChan)
if err != nil {
return err
}
// Wait until the transport has some quota to send the data.
tq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.sendQuotaPool.acquire())
tq, err := wait(s.ctx, t.ctx, s.done, s.goAway, t.sendQuotaPool.acquire())
if err != nil {
return err
}
@ -716,93 +679,51 @@ func (t *http2Client) Write(s *Stream, hdr []byte, data []byte, opts *Options) e
if tq < size {
size = tq
}
if p == nil {
p = r.Next(size)
if size > len(r) {
size = len(r)
}
p := r[:size]
ps := len(p)
if ps < sq {
// Overbooked stream quota. Return it back.
s.sendQuotaPool.add(sq - ps)
}
if ps < tq {
// Overbooked transport quota. Return it back.
t.sendQuotaPool.add(tq - ps)
}
}
var (
endStream bool
forceFlush bool
)
// Indicate there is a writer who is about to write a data frame.
t.framer.adjustNumWriters(1)
// Got some quota. Try to acquire writing privilege on the transport.
if _, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.writableChan); err != nil {
if _, ok := err.(StreamError); ok || err == io.EOF {
// Return the connection quota back.
t.sendQuotaPool.add(len(p))
}
if t.framer.adjustNumWriters(-1) == 0 {
// This writer is the last one in this batch and has the
// responsibility to flush the buffered frames. It queues
// a flush request to controlBuf instead of flushing directly
// in order to avoid the race with other writing or flushing.
t.controlBuf.put(&flushIO{})
}
return err
}
select {
case <-s.ctx.Done():
t.sendQuotaPool.add(len(p))
if t.framer.adjustNumWriters(-1) == 0 {
t.controlBuf.put(&flushIO{})
}
t.writableChan <- 0
return ContextErr(s.ctx.Err())
default:
}
if oqv != atomic.LoadUint32(&t.outQuotaVersion) {
// InitialWindowSize settings frame must have been received after we
// acquired send quota but before we got the writable channel.
// We must forsake this write.
t.sendQuotaPool.add(len(p))
s.sendQuotaPool.add(len(p))
if t.framer.adjustNumWriters(-1) == 0 {
t.controlBuf.put(&flushIO{})
}
t.writableChan <- 0
continue
}
if r.Len() == 0 {
if isLastSlice {
if opts.Last {
endStream = true
// Acquire local send quota to be able to write to the controlBuf.
ltq, err := wait(s.ctx, t.ctx, s.done, s.goAway, s.localSendQuota.acquire())
if err != nil {
if _, ok := err.(ConnectionError); !ok {
t.sendQuotaPool.add(ps)
}
if t.framer.adjustNumWriters(0) == 1 {
// Do a force flush iff this is last frame for the entire gRPC message
// and the caller is the only writer at this moment.
forceFlush = true
}
} else {
isLastSlice = true
if len(data) != 0 {
r = bytes.NewBuffer(data)
return err
}
s.localSendQuota.add(ltq - ps) // It's ok if we make it negative.
var endStream bool
// See if this is the last frame to be written.
if opts.Last {
if len(r)-size == 0 { // No more data in r after this iteration.
if idx == 0 { // We're writing data header.
if len(data) == 0 { // There's no data to follow.
endStream = true
}
} else { // We're writing data.
endStream = true
}
}
}
}
// If WriteData fails, all the pending streams will be handled
// by http2Client.Close(). No explicit CloseStream() needs to be
// invoked.
if err := t.framer.writeData(forceFlush, s.id, endStream, p); err != nil {
t.notifyError(err)
return connectionErrorf(true, err, "transport: %v", err)
}
p = nil
if t.framer.adjustNumWriters(-1) == 0 {
t.framer.flushWrite()
}
t.writableChan <- 0
if r.Len() == 0 {
break
success := func() {
t.controlBuf.put(&dataFrame{streamID: s.id, endStream: endStream, d: p, f: func() { s.localSendQuota.add(ps) }})
if ps < sq {
s.sendQuotaPool.lockedAdd(sq - ps)
}
r = r[ps:]
}
failure := func() {
s.sendQuotaPool.lockedAdd(sq)
}
if !s.sendQuotaPool.compareAndExecute(quotaVer, success, failure) {
t.sendQuotaPool.add(ps)
s.localSendQuota.add(ps)
}
}
}
if !opts.Last {
@ -833,11 +754,11 @@ func (t *http2Client) adjustWindow(s *Stream, n uint32) {
return
}
if w := s.fc.maybeAdjust(n); w > 0 {
// Piggyback conneciton's window update along.
// Piggyback connection's window update along.
if cw := t.fc.resetPendingUpdate(); cw > 0 {
t.controlBuf.put(&windowUpdate{0, cw, false})
t.controlBuf.put(&windowUpdate{0, cw})
}
t.controlBuf.put(&windowUpdate{s.id, w, true})
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
@ -852,9 +773,9 @@ func (t *http2Client) updateWindow(s *Stream, n uint32) {
}
if w := s.fc.onRead(n); w > 0 {
if cw := t.fc.resetPendingUpdate(); cw > 0 {
t.controlBuf.put(&windowUpdate{0, cw, false})
t.controlBuf.put(&windowUpdate{0, cw})
}
t.controlBuf.put(&windowUpdate{s.id, w, true})
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
@ -868,7 +789,7 @@ func (t *http2Client) updateFlowControl(n uint32) {
}
t.initialWindowSize = int32(n)
t.mu.Unlock()
t.controlBuf.put(&windowUpdate{0, t.fc.newLimit(n), false})
t.controlBuf.put(&windowUpdate{0, t.fc.newLimit(n)})
t.controlBuf.put(&settings{
ack: false,
ss: []http2.Setting{
@ -898,15 +819,17 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
// Furthermore, if a bdpPing is being sent out we can piggyback
// connection's window update for the bytes we just received.
if sendBDPPing {
t.controlBuf.put(&windowUpdate{0, uint32(size), false})
if size != 0 { // Could've been an empty data frame.
t.controlBuf.put(&windowUpdate{0, uint32(size)})
}
t.controlBuf.put(bdpPing)
} else {
if err := t.fc.onData(uint32(size)); err != nil {
t.notifyError(connectionErrorf(true, err, "%v", err))
t.Close()
return
}
if w := t.fc.onRead(uint32(size)); w > 0 {
t.controlBuf.put(&windowUpdate{0, w, true})
t.controlBuf.put(&windowUpdate{0, w})
}
}
// Select the right stream to dispatch.
@ -930,7 +853,7 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
}
if f.Header().Flags.Has(http2.FlagDataPadded) {
if w := s.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
t.controlBuf.put(&windowUpdate{s.id, w, true})
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
s.mu.Unlock()
@ -1019,10 +942,10 @@ func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
id := f.LastStreamID
if id > 0 && id%2 != 1 {
t.mu.Unlock()
t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: stream ID %d is even", f.LastStreamID))
t.Close()
return
}
// A client can recieve multiple GoAways from server (look at https://github.com/grpc/grpc-go/issues/1387).
// A client can receive multiple GoAways from server (look at https://github.com/grpc/grpc-go/issues/1387).
// The idea is that the first GoAway will be sent with an ID of MaxInt32 and the second GoAway will be sent after an RTT delay
// with the ID of the last stream the server will process.
// Therefore, when we get the first GoAway we don't really close any streams. While in case of second GoAway we
@ -1033,7 +956,7 @@ func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
// If there are multiple GoAways the first one should always have an ID greater than the following ones.
if id > t.prevGoAwayID {
t.mu.Unlock()
t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: previously recv GOAWAY frame with LastStramID %d, currently recv %d", id, f.LastStreamID))
t.Close()
return
}
default:
@ -1177,22 +1100,22 @@ func handleMalformedHTTP2(s *Stream, err error) {
// TODO(zhaoq): Check the validity of the incoming frame sequence.
func (t *http2Client) reader() {
// Check the validity of server preface.
frame, err := t.framer.readFrame()
frame, err := t.framer.fr.ReadFrame()
if err != nil {
t.notifyError(err)
t.Close()
return
}
atomic.CompareAndSwapUint32(&t.activity, 0, 1)
sf, ok := frame.(*http2.SettingsFrame)
if !ok {
t.notifyError(err)
t.Close()
return
}
t.handleSettings(sf)
// loop to keep reading incoming messages on this transport.
for {
frame, err := t.framer.readFrame()
frame, err := t.framer.fr.ReadFrame()
atomic.CompareAndSwapUint32(&t.activity, 0, 1)
if err != nil {
// Abort an active stream if the http2.Framer returns a
@ -1204,12 +1127,12 @@ func (t *http2Client) reader() {
t.mu.Unlock()
if s != nil {
// use error detail to provide better err message
handleMalformedHTTP2(s, streamErrorf(http2ErrConvTab[se.Code], "%v", t.framer.errorDetail()))
handleMalformedHTTP2(s, streamErrorf(http2ErrConvTab[se.Code], "%v", t.framer.fr.ErrorDetail()))
}
continue
} else {
// Transport error.
t.notifyError(err)
t.Close()
return
}
}
@ -1253,61 +1176,86 @@ func (t *http2Client) applySettings(ss []http2.Setting) {
t.mu.Lock()
for _, stream := range t.activeStreams {
// Adjust the sending quota for each stream.
stream.sendQuotaPool.add(int(s.Val) - int(t.streamSendQuota))
stream.sendQuotaPool.addAndUpdate(int(s.Val) - int(t.streamSendQuota))
}
t.streamSendQuota = s.Val
t.mu.Unlock()
atomic.AddUint32(&t.outQuotaVersion, 1)
}
}
}
// controller running in a separate goroutine takes charge of sending control
// frames (e.g., window update, reset stream, setting, etc.) to the server.
func (t *http2Client) controller() {
for {
select {
case i := <-t.controlBuf.get():
t.controlBuf.load()
select {
case <-t.writableChan:
switch i := i.(type) {
case *windowUpdate:
t.framer.writeWindowUpdate(i.flush, i.streamID, i.increment)
case *settings:
if i.ack {
t.framer.writeSettingsAck(true)
t.applySettings(i.ss)
} else {
t.framer.writeSettings(true, i.ss...)
}
case *resetStream:
// If the server needs to be to intimated about stream closing,
// then we need to make sure the RST_STREAM frame is written to
// the wire before the headers of the next stream waiting on
// streamQuota. We ensure this by adding to the streamsQuota pool
// only after having acquired the writableChan to send RST_STREAM.
t.streamsQuota.add(1)
t.framer.writeRSTStream(true, i.streamID, i.code)
case *flushIO:
t.framer.flushWrite()
case *ping:
if !i.ack {
t.bdpEst.timesnap(i.data)
}
t.framer.writePing(true, i.ack, i.data)
default:
errorf("transport: http2Client.controller got unexpected item type %v\n", i)
}
t.writableChan <- 0
continue
case <-t.shutdownChan:
return
}
case <-t.shutdownChan:
return
// TODO(mmukhi): A lot of this code(and code in other places in the tranpsort layer)
// is duplicated between the client and the server.
// The transport layer needs to be refactored to take care of this.
func (t *http2Client) itemHandler(i item) error {
var err error
switch i := i.(type) {
case *dataFrame:
err = t.framer.fr.WriteData(i.streamID, i.endStream, i.d)
if err == nil {
i.f()
}
case *headerFrame:
t.hBuf.Reset()
for _, f := range i.hf {
t.hEnc.WriteField(f)
}
endHeaders := false
first := true
for !endHeaders {
size := t.hBuf.Len()
if size > http2MaxFrameLen {
size = http2MaxFrameLen
} else {
endHeaders = true
}
if first {
first = false
err = t.framer.fr.WriteHeaders(http2.HeadersFrameParam{
StreamID: i.streamID,
BlockFragment: t.hBuf.Next(size),
EndStream: i.endStream,
EndHeaders: endHeaders,
})
} else {
err = t.framer.fr.WriteContinuation(
i.streamID,
endHeaders,
t.hBuf.Next(size),
)
}
if err != nil {
return err
}
}
case *windowUpdate:
err = t.framer.fr.WriteWindowUpdate(i.streamID, i.increment)
case *settings:
if i.ack {
t.applySettings(i.ss)
err = t.framer.fr.WriteSettingsAck()
} else {
err = t.framer.fr.WriteSettings(i.ss...)
}
case *resetStream:
// If the server needs to be to intimated about stream closing,
// then we need to make sure the RST_STREAM frame is written to
// the wire before the headers of the next stream waiting on
// streamQuota. We ensure this by adding to the streamsQuota pool
// only after having acquired the writableChan to send RST_STREAM.
err = t.framer.fr.WriteRSTStream(i.streamID, i.code)
t.streamsQuota.add(1)
case *flushIO:
err = t.framer.writer.Flush()
case *ping:
if !i.ack {
t.bdpEst.timesnap(i.data)
}
err = t.framer.fr.WritePing(i.ack, i.data)
default:
errorf("transport: http2Client.controller got unexpected item type %v\n", i)
}
return err
}
// keepalive running in a separate goroutune makes sure the connection is alive by sending pings.
@ -1331,7 +1279,7 @@ func (t *http2Client) keepalive() {
case <-t.awakenKeepalive:
// If the control gets here a ping has been sent
// need to reset the timer with keepalive.Timeout.
case <-t.shutdownChan:
case <-t.ctx.Done():
return
}
} else {
@ -1350,13 +1298,13 @@ func (t *http2Client) keepalive() {
}
t.Close()
return
case <-t.shutdownChan:
case <-t.ctx.Done():
if !timer.Stop() {
<-timer.C
}
return
}
case <-t.shutdownChan:
case <-t.ctx.Done():
if !timer.Stop() {
<-timer.C
}
@ -1366,25 +1314,9 @@ func (t *http2Client) keepalive() {
}
func (t *http2Client) Error() <-chan struct{} {
return t.errorChan
return t.ctx.Done()
}
func (t *http2Client) GoAway() <-chan struct{} {
return t.goAway
}
func (t *http2Client) notifyError(err error) {
t.mu.Lock()
// make sure t.errorChan is closed only once.
if t.state == draining {
t.mu.Unlock()
t.Close()
return
}
if t.state == reachable {
t.state = unreachable
close(t.errorChan)
infof("transport: http2Client.notifyError got notified that the client transport was broken %v.", err)
}
t.mu.Unlock()
}

598
cmd/vendor/google.golang.org/grpc/transport/http2_server.go generated vendored
View File

@ -21,6 +21,7 @@ package transport
import (
"bytes"
"errors"
"fmt"
"io"
"math"
"math/rand"
@ -51,23 +52,16 @@ var ErrIllegalHeaderWrite = errors.New("transport: the stream is done or WriteHe
// http2Server implements the ServerTransport interface with HTTP2.
type http2Server struct {
ctx context.Context
cancel context.CancelFunc
conn net.Conn
remoteAddr net.Addr
localAddr net.Addr
maxStreamID uint32 // max stream ID ever seen
authInfo credentials.AuthInfo // auth info about the connection
inTapHandle tap.ServerInHandle
// writableChan synchronizes write access to the transport.
// A writer acquires the write lock by receiving a value on writableChan
// and releases it by sending on writableChan.
writableChan chan int
// shutdownChan is closed when Close is called.
// Blocking operations should select on shutdownChan to avoid
// blocking forever after Close.
shutdownChan chan struct{}
framer *framer
hBuf *bytes.Buffer // the buffer for HPACK encoding
hEnc *hpack.Encoder // HPACK encoder
framer *framer
hBuf *bytes.Buffer // the buffer for HPACK encoding
hEnc *hpack.Encoder // HPACK encoder
// The max number of concurrent streams.
maxStreams uint32
// controlBuf delivers all the control related tasks (e.g., window
@ -96,8 +90,6 @@ type http2Server struct {
initialWindowSize int32
bdpEst *bdpEstimator
outQuotaVersion uint32
mu sync.Mutex // guard the following
// drainChan is initialized when drain(...) is called the first time.
@ -112,7 +104,7 @@ type http2Server struct {
// the per-stream outbound flow control window size set by the peer.
streamSendQuota uint32
// idle is the time instant when the connection went idle.
// This is either the begining of the connection or when the number of
// This is either the beginning of the connection or when the number of
// RPCs go down to 0.
// When the connection is busy, this value is set to 0.
idle time.Time
@ -121,7 +113,15 @@ type http2Server struct {
// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is
// returned if something goes wrong.
func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err error) {
framer := newFramer(conn)
writeBufSize := defaultWriteBufSize
if config.WriteBufferSize > 0 {
writeBufSize = config.WriteBufferSize
}
readBufSize := defaultReadBufSize
if config.ReadBufferSize > 0 {
readBufSize = config.ReadBufferSize
}
framer := newFramer(conn, writeBufSize, readBufSize)
// Send initial settings as connection preface to client.
var isettings []http2.Setting
// TODO(zhaoq): Have a better way to signal "no limit" because 0 is
@ -151,12 +151,12 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
ID: http2.SettingInitialWindowSize,
Val: uint32(iwz)})
}
if err := framer.writeSettings(true, isettings...); err != nil {
if err := framer.fr.WriteSettings(isettings...); err != nil {
return nil, connectionErrorf(true, err, "transport: %v", err)
}
// Adjust the connection flow control window if needed.
if delta := uint32(icwz - defaultWindowSize); delta > 0 {
if err := framer.writeWindowUpdate(true, 0, delta); err != nil {
if err := framer.fr.WriteWindowUpdate(0, delta); err != nil {
return nil, connectionErrorf(true, err, "transport: %v", err)
}
}
@ -183,8 +183,10 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
kep.MinTime = defaultKeepalivePolicyMinTime
}
var buf bytes.Buffer
ctx, cancel := context.WithCancel(context.Background())
t := &http2Server{
ctx: context.Background(),
ctx: ctx,
cancel: cancel,
conn: conn,
remoteAddr: conn.RemoteAddr(),
localAddr: conn.LocalAddr(),
@ -198,8 +200,6 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
fc: &inFlow{limit: uint32(icwz)},
sendQuotaPool: newQuotaPool(defaultWindowSize),
state: reachable,
writableChan: make(chan int, 1),
shutdownChan: make(chan struct{}),
activeStreams: make(map[uint32]*Stream),
streamSendQuota: defaultWindowSize,
stats: config.StatsHandler,
@ -222,9 +222,12 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
connBegin := &stats.ConnBegin{}
t.stats.HandleConn(t.ctx, connBegin)
}
go t.controller()
t.framer.writer.Flush()
go func() {
loopyWriter(t.ctx, t.controlBuf, t.itemHandler)
t.Close()
}()
go t.keepalive()
t.writableChan <- 0
return t, nil
}
@ -313,6 +316,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
}
t.maxStreamID = streamID
s.sendQuotaPool = newQuotaPool(int(t.streamSendQuota))
s.localSendQuota = newQuotaPool(defaultLocalSendQuota)
t.activeStreams[streamID] = s
if len(t.activeStreams) == 1 {
t.idle = time.Time{}
@ -366,7 +370,7 @@ func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.
return
}
frame, err := t.framer.readFrame()
frame, err := t.framer.fr.ReadFrame()
if err == io.EOF || err == io.ErrUnexpectedEOF {
t.Close()
return
@ -386,7 +390,7 @@ func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.
t.handleSettings(sf)
for {
frame, err := t.framer.readFrame()
frame, err := t.framer.fr.ReadFrame()
atomic.StoreUint32(&t.activity, 1)
if err != nil {
if se, ok := err.(http2.StreamError); ok {
@ -457,9 +461,9 @@ func (t *http2Server) adjustWindow(s *Stream, n uint32) {
}
if w := s.fc.maybeAdjust(n); w > 0 {
if cw := t.fc.resetPendingUpdate(); cw > 0 {
t.controlBuf.put(&windowUpdate{0, cw, false})
t.controlBuf.put(&windowUpdate{0, cw})
}
t.controlBuf.put(&windowUpdate{s.id, w, true})
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
@ -474,9 +478,9 @@ func (t *http2Server) updateWindow(s *Stream, n uint32) {
}
if w := s.fc.onRead(n); w > 0 {
if cw := t.fc.resetPendingUpdate(); cw > 0 {
t.controlBuf.put(&windowUpdate{0, cw, false})
t.controlBuf.put(&windowUpdate{0, cw})
}
t.controlBuf.put(&windowUpdate{s.id, w, true})
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
@ -490,7 +494,7 @@ func (t *http2Server) updateFlowControl(n uint32) {
}
t.initialWindowSize = int32(n)
t.mu.Unlock()
t.controlBuf.put(&windowUpdate{0, t.fc.newLimit(n), false})
t.controlBuf.put(&windowUpdate{0, t.fc.newLimit(n)})
t.controlBuf.put(&settings{
ack: false,
ss: []http2.Setting{
@ -521,7 +525,9 @@ func (t *http2Server) handleData(f *http2.DataFrame) {
// Furthermore, if a bdpPing is being sent out we can piggyback
// connection's window update for the bytes we just received.
if sendBDPPing {
t.controlBuf.put(&windowUpdate{0, uint32(size), false})
if size != 0 { // Could be an empty frame.
t.controlBuf.put(&windowUpdate{0, uint32(size)})
}
t.controlBuf.put(bdpPing)
} else {
if err := t.fc.onData(uint32(size)); err != nil {
@ -530,7 +536,7 @@ func (t *http2Server) handleData(f *http2.DataFrame) {
return
}
if w := t.fc.onRead(uint32(size)); w > 0 {
t.controlBuf.put(&windowUpdate{0, w, true})
t.controlBuf.put(&windowUpdate{0, w})
}
}
// Select the right stream to dispatch.
@ -552,7 +558,7 @@ func (t *http2Server) handleData(f *http2.DataFrame) {
}
if f.Header().Flags.Has(http2.FlagDataPadded) {
if w := s.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
t.controlBuf.put(&windowUpdate{s.id, w, true})
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
s.mu.Unlock()
@ -593,10 +599,23 @@ func (t *http2Server) handleSettings(f *http2.SettingsFrame) {
ss = append(ss, s)
return nil
})
// The settings will be applied once the ack is sent.
t.controlBuf.put(&settings{ack: true, ss: ss})
}
func (t *http2Server) applySettings(ss []http2.Setting) {
for _, s := range ss {
if s.ID == http2.SettingInitialWindowSize {
t.mu.Lock()
for _, stream := range t.activeStreams {
stream.sendQuotaPool.addAndUpdate(int(s.Val) - int(t.streamSendQuota))
}
t.streamSendQuota = s.Val
t.mu.Unlock()
}
}
}
const (
maxPingStrikes = 2
defaultPingTimeout = 2 * time.Hour
@ -634,7 +653,7 @@ func (t *http2Server) handlePing(f *http2.PingFrame) {
t.mu.Unlock()
if ns < 1 && !t.kep.PermitWithoutStream {
// Keepalive shouldn't be active thus, this new ping should
// have come after atleast defaultPingTimeout.
// have come after at least defaultPingTimeout.
if t.lastPingAt.Add(defaultPingTimeout).After(now) {
t.pingStrikes++
}
@ -647,6 +666,7 @@ func (t *http2Server) handlePing(f *http2.PingFrame) {
if t.pingStrikes > maxPingStrikes {
// Send goaway and close the connection.
errorf("transport: Got to too many pings from the client, closing the connection.")
t.controlBuf.put(&goAway{code: http2.ErrCodeEnhanceYourCalm, debugData: []byte("too_many_pings"), closeConn: true})
}
}
@ -663,47 +683,16 @@ func (t *http2Server) handleWindowUpdate(f *http2.WindowUpdateFrame) {
}
}
func (t *http2Server) writeHeaders(s *Stream, b *bytes.Buffer, endStream bool) error {
first := true
endHeaders := false
var err error
defer func() {
if err == nil {
// Reset ping strikes when seding headers since that might cause the
// peer to send ping.
atomic.StoreUint32(&t.resetPingStrikes, 1)
}
}()
// Sends the headers in a single batch.
for !endHeaders {
size := t.hBuf.Len()
if size > http2MaxFrameLen {
size = http2MaxFrameLen
} else {
endHeaders = true
}
if first {
p := http2.HeadersFrameParam{
StreamID: s.id,
BlockFragment: b.Next(size),
EndStream: endStream,
EndHeaders: endHeaders,
}
err = t.framer.writeHeaders(endHeaders, p)
first = false
} else {
err = t.framer.writeContinuation(endHeaders, s.id, endHeaders, b.Next(size))
}
if err != nil {
t.Close()
return connectionErrorf(true, err, "transport: %v", err)
}
}
return nil
}
// WriteHeader sends the header metedata md back to the client.
func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
select {
case <-s.ctx.Done():
return ContextErr(s.ctx.Err())
case <-t.ctx.Done():
return ErrConnClosing
default:
}
s.mu.Lock()
if s.headerOk || s.state == streamDone {
s.mu.Unlock()
@ -719,14 +708,13 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
}
md = s.header
s.mu.Unlock()
if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
return err
}
t.hBuf.Reset()
t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"})
t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
// TODO(mmukhi): Benchmark if the perfomance gets better if count the metadata and other header fields
// first and create a slice of that exact size.
headerFields := make([]hpack.HeaderField, 0, 2) // at least :status, content-type will be there if none else.
headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"})
headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
if s.sendCompress != "" {
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress})
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress})
}
for k, vv := range md {
if isReservedHeader(k) {
@ -734,20 +722,20 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
continue
}
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
bufLen := t.hBuf.Len()
if err := t.writeHeaders(s, t.hBuf, false); err != nil {
return err
}
t.controlBuf.put(&headerFrame{
streamID: s.id,
hf: headerFields,
endStream: false,
})
if t.stats != nil {
outHeader := &stats.OutHeader{
WireLength: bufLen,
//WireLength: // TODO(mmukhi): Revisit this later, if needed.
}
t.stats.HandleRPC(s.Context(), outHeader)
}
t.writableChan <- 0
return nil
}
@ -756,6 +744,12 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
// TODO(zhaoq): Now it indicates the end of entire stream. Revisit if early
// OK is adopted.
func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
select {
case <-t.ctx.Done():
return ErrConnClosing
default:
}
var headersSent, hasHeader bool
s.mu.Lock()
if s.state == streamDone {
@ -775,25 +769,15 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
headersSent = true
}
// Always write a status regardless of context cancellation unless the stream
// is terminated (e.g. by a RST_STREAM, GOAWAY, or transport error). The
// server's application code is already done so it is fine to ignore s.ctx.
select {
case <-t.shutdownChan:
return ErrConnClosing
case <-t.writableChan:
}
t.hBuf.Reset()
// TODO(mmukhi): Benchmark if the perfomance gets better if count the metadata and other header fields
// first and create a slice of that exact size.
headerFields := make([]hpack.HeaderField, 0, 2) // grpc-status and grpc-message will be there if none else.
if !headersSent {
t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"})
t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"})
headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
}
t.hEnc.WriteField(
hpack.HeaderField{
Name: "grpc-status",
Value: strconv.Itoa(int(st.Code())),
})
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(st.Message())})
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-status", Value: strconv.Itoa(int(st.Code()))})
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(st.Message())})
if p := st.Proto(); p != nil && len(p.Details) > 0 {
stBytes, err := proto.Marshal(p)
@ -802,7 +786,7 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
panic(err)
}
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-status-details-bin", Value: encodeBinHeader(stBytes)})
headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-status-details-bin", Value: encodeBinHeader(stBytes)})
}
// Attach the trailer metadata.
@ -812,36 +796,32 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
continue
}
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
bufLen := t.hBuf.Len()
if err := t.writeHeaders(s, t.hBuf, true); err != nil {
t.Close()
return err
}
t.controlBuf.put(&headerFrame{
streamID: s.id,
hf: headerFields,
endStream: true,
})
if t.stats != nil {
outTrailer := &stats.OutTrailer{
WireLength: bufLen,
}
t.stats.HandleRPC(s.Context(), outTrailer)
t.stats.HandleRPC(s.Context(), &stats.OutTrailer{})
}
t.closeStream(s)
t.writableChan <- 0
return nil
}
// Write converts the data into HTTP2 data frame and sends it out. Non-nil error
// is returns if it fails (e.g., framing error, transport error).
func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) (err error) {
// TODO(zhaoq): Support multi-writers for a single stream.
secondStart := http2MaxFrameLen - len(hdr)%http2MaxFrameLen
if len(data) < secondStart {
secondStart = len(data)
select {
case <-s.ctx.Done():
return ContextErr(s.ctx.Err())
case <-t.ctx.Done():
return ErrConnClosing
default:
}
hdr = append(hdr, data[:secondStart]...)
data = data[secondStart:]
isLastSlice := (len(data) == 0)
var writeHeaderFrame bool
s.mu.Lock()
if s.state == streamDone {
@ -855,124 +835,74 @@ func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) (
if writeHeaderFrame {
t.WriteHeader(s, nil)
}
r := bytes.NewBuffer(hdr)
var (
p []byte
oqv uint32
)
for {
if r.Len() == 0 && p == nil {
return nil
}
oqv = atomic.LoadUint32(&t.outQuotaVersion)
size := http2MaxFrameLen
// Wait until the stream has some quota to send the data.
sq, err := wait(s.ctx, nil, nil, t.shutdownChan, s.sendQuotaPool.acquire())
if err != nil {
return err
}
// Wait until the transport has some quota to send the data.
tq, err := wait(s.ctx, nil, nil, t.shutdownChan, t.sendQuotaPool.acquire())
if err != nil {
return err
}
if sq < size {
size = sq
}
if tq < size {
size = tq
}
if p == nil {
p = r.Next(size)
}
ps := len(p)
if ps < sq {
// Overbooked stream quota. Return it back.
s.sendQuotaPool.add(sq - ps)
}
if ps < tq {
// Overbooked transport quota. Return it back.
t.sendQuotaPool.add(tq - ps)
}
t.framer.adjustNumWriters(1)
// Got some quota. Try to acquire writing privilege on the
// transport.
if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
if _, ok := err.(StreamError); ok {
// Return the connection quota back.
t.sendQuotaPool.add(ps)
// Add data to header frame so that we can equally distribute data across frames.
emptyLen := http2MaxFrameLen - len(hdr)
if emptyLen > len(data) {
emptyLen = len(data)
}
hdr = append(hdr, data[:emptyLen]...)
data = data[emptyLen:]
for _, r := range [][]byte{hdr, data} {
for len(r) > 0 {
size := http2MaxFrameLen
// Wait until the stream has some quota to send the data.
quotaChan, quotaVer := s.sendQuotaPool.acquireWithVersion()
sq, err := wait(s.ctx, t.ctx, nil, nil, quotaChan)
if err != nil {
return err
}
if t.framer.adjustNumWriters(-1) == 0 {
// This writer is the last one in this batch and has the
// responsibility to flush the buffered frames. It queues
// a flush request to controlBuf instead of flushing directly
// in order to avoid the race with other writing or flushing.
t.controlBuf.put(&flushIO{})
// Wait until the transport has some quota to send the data.
tq, err := wait(s.ctx, t.ctx, nil, nil, t.sendQuotaPool.acquire())
if err != nil {
return err
}
return err
}
select {
case <-s.ctx.Done():
t.sendQuotaPool.add(ps)
if t.framer.adjustNumWriters(-1) == 0 {
t.controlBuf.put(&flushIO{})
if sq < size {
size = sq
}
t.writableChan <- 0
return ContextErr(s.ctx.Err())
default:
}
if oqv != atomic.LoadUint32(&t.outQuotaVersion) {
// InitialWindowSize settings frame must have been received after we
// acquired send quota but before we got the writable channel.
// We must forsake this write.
t.sendQuotaPool.add(ps)
s.sendQuotaPool.add(ps)
if t.framer.adjustNumWriters(-1) == 0 {
t.controlBuf.put(&flushIO{})
if tq < size {
size = tq
}
t.writableChan <- 0
continue
}
var forceFlush bool
if r.Len() == 0 {
if isLastSlice {
if t.framer.adjustNumWriters(0) == 1 && !opts.Last {
forceFlush = true
if size > len(r) {
size = len(r)
}
p := r[:size]
ps := len(p)
if ps < tq {
// Overbooked transport quota. Return it back.
t.sendQuotaPool.add(tq - ps)
}
// Acquire local send quota to be able to write to the controlBuf.
ltq, err := wait(s.ctx, t.ctx, nil, nil, s.localSendQuota.acquire())
if err != nil {
if _, ok := err.(ConnectionError); !ok {
t.sendQuotaPool.add(ps)
}
} else {
r = bytes.NewBuffer(data)
isLastSlice = true
return err
}
s.localSendQuota.add(ltq - ps) // It's ok we make this negative.
// Reset ping strikes when sending data since this might cause
// the peer to send ping.
atomic.StoreUint32(&t.resetPingStrikes, 1)
success := func() {
t.controlBuf.put(&dataFrame{streamID: s.id, endStream: false, d: p, f: func() {
s.localSendQuota.add(ps)
}})
if ps < sq {
// Overbooked stream quota. Return it back.
s.sendQuotaPool.lockedAdd(sq - ps)
}
r = r[ps:]
}
failure := func() {
s.sendQuotaPool.lockedAdd(sq)
}
if !s.sendQuotaPool.compareAndExecute(quotaVer, success, failure) {
t.sendQuotaPool.add(ps)
s.localSendQuota.add(ps)
}
}
// Reset ping strikes when sending data since this might cause
// the peer to send ping.
atomic.StoreUint32(&t.resetPingStrikes, 1)
if err := t.framer.writeData(forceFlush, s.id, false, p); err != nil {
t.Close()
return connectionErrorf(true, err, "transport: %v", err)
}
p = nil
if t.framer.adjustNumWriters(-1) == 0 {
t.framer.flushWrite()
}
t.writableChan <- 0
}
}
func (t *http2Server) applySettings(ss []http2.Setting) {
for _, s := range ss {
if s.ID == http2.SettingInitialWindowSize {
t.mu.Lock()
defer t.mu.Unlock()
for _, stream := range t.activeStreams {
stream.sendQuotaPool.add(int(s.Val) - int(t.streamSendQuota))
}
t.streamSendQuota = s.Val
atomic.AddUint32(&t.outQuotaVersion, 1)
}
}
return nil
}
// keepalive running in a separate goroutine does the following:
@ -988,7 +918,7 @@ func (t *http2Server) keepalive() {
maxAge := time.NewTimer(t.kp.MaxConnectionAge)
keepalive := time.NewTimer(t.kp.Time)
// NOTE: All exit paths of this function should reset their
// respecitve timers. A failure to do so will cause the
// respective timers. A failure to do so will cause the
// following clean-up to deadlock and eventually leak.
defer func() {
if !maxIdle.Stop() {
@ -1031,7 +961,7 @@ func (t *http2Server) keepalive() {
t.Close()
// Reseting the timer so that the clean-up doesn't deadlock.
maxAge.Reset(infinity)
case <-t.shutdownChan:
case <-t.ctx.Done():
}
return
case <-keepalive.C:
@ -1049,7 +979,7 @@ func (t *http2Server) keepalive() {
pingSent = true
t.controlBuf.put(p)
keepalive.Reset(t.kp.Timeout)
case <-t.shutdownChan:
case <-t.ctx.Done():
return
}
}
@ -1057,93 +987,129 @@ func (t *http2Server) keepalive() {
var goAwayPing = &ping{data: [8]byte{1, 6, 1, 8, 0, 3, 3, 9}}
// controller running in a separate goroutine takes charge of sending control
// frames (e.g., window update, reset stream, setting, etc.) to the server.
func (t *http2Server) controller() {
for {
select {
case i := <-t.controlBuf.get():
t.controlBuf.load()
// TODO(mmukhi): A lot of this code(and code in other places in the tranpsort layer)
// is duplicated between the client and the server.
// The transport layer needs to be refactored to take care of this.
func (t *http2Server) itemHandler(i item) error {
switch i := i.(type) {
case *dataFrame:
if err := t.framer.fr.WriteData(i.streamID, i.endStream, i.d); err != nil {
return err
}
i.f()
return nil
case *headerFrame:
t.hBuf.Reset()
for _, f := range i.hf {
t.hEnc.WriteField(f)
}
first := true
endHeaders := false
for !endHeaders {
size := t.hBuf.Len()
if size > http2MaxFrameLen {
size = http2MaxFrameLen
} else {
endHeaders = true
}
var err error
if first {
first = false
err = t.framer.fr.WriteHeaders(http2.HeadersFrameParam{
StreamID: i.streamID,
BlockFragment: t.hBuf.Next(size),
EndStream: i.endStream,
EndHeaders: endHeaders,
})
} else {
err = t.framer.fr.WriteContinuation(
i.streamID,
endHeaders,
t.hBuf.Next(size),
)
}
if err != nil {
return err
}
}
atomic.StoreUint32(&t.resetPingStrikes, 1)
return nil
case *windowUpdate:
return t.framer.fr.WriteWindowUpdate(i.streamID, i.increment)
case *settings:
if i.ack {
t.applySettings(i.ss)
return t.framer.fr.WriteSettingsAck()
}
return t.framer.fr.WriteSettings(i.ss...)
case *resetStream:
return t.framer.fr.WriteRSTStream(i.streamID, i.code)
case *goAway:
t.mu.Lock()
if t.state == closing {
t.mu.Unlock()
// The transport is closing.
return fmt.Errorf("transport: Connection closing")
}
sid := t.maxStreamID
if !i.headsUp {
// Stop accepting more streams now.
t.state = draining
t.mu.Unlock()
if err := t.framer.fr.WriteGoAway(sid, i.code, i.debugData); err != nil {
return err
}
if i.closeConn {
// Abruptly close the connection following the GoAway (via
// loopywriter). But flush out what's inside the buffer first.
t.framer.writer.Flush()
return fmt.Errorf("transport: Connection closing")
}
return nil
}
t.mu.Unlock()
// For a graceful close, send out a GoAway with stream ID of MaxUInt32,
// Follow that with a ping and wait for the ack to come back or a timer
// to expire. During this time accept new streams since they might have
// originated before the GoAway reaches the client.
// After getting the ack or timer expiration send out another GoAway this
// time with an ID of the max stream server intends to process.
if err := t.framer.fr.WriteGoAway(math.MaxUint32, http2.ErrCodeNo, []byte{}); err != nil {
return err
}
if err := t.framer.fr.WritePing(false, goAwayPing.data); err != nil {
return err
}
go func() {
timer := time.NewTimer(time.Minute)
defer timer.Stop()
select {
case <-t.writableChan:
switch i := i.(type) {
case *windowUpdate:
t.framer.writeWindowUpdate(i.flush, i.streamID, i.increment)
case *settings:
if i.ack {
t.framer.writeSettingsAck(true)
t.applySettings(i.ss)
} else {
t.framer.writeSettings(true, i.ss...)
}
case *resetStream:
t.framer.writeRSTStream(true, i.streamID, i.code)
case *goAway:
t.mu.Lock()
if t.state == closing {
t.mu.Unlock()
// The transport is closing.
return
}
sid := t.maxStreamID
if !i.headsUp {
// Stop accepting more streams now.
t.state = draining
activeStreams := len(t.activeStreams)
t.mu.Unlock()
t.framer.writeGoAway(true, sid, i.code, i.debugData)
if i.closeConn || activeStreams == 0 {
// Abruptly close the connection following the GoAway.
t.Close()
}
t.writableChan <- 0
continue
}
t.mu.Unlock()
// For a graceful close, send out a GoAway with stream ID of MaxUInt32,
// Follow that with a ping and wait for the ack to come back or a timer
// to expire. During this time accept new streams since they might have
// originated before the GoAway reaches the client.
// After getting the ack or timer expiration send out another GoAway this
// time with an ID of the max stream server intends to process.
t.framer.writeGoAway(true, math.MaxUint32, http2.ErrCodeNo, []byte{})
t.framer.writePing(true, false, goAwayPing.data)
go func() {
timer := time.NewTimer(time.Minute)
defer timer.Stop()
select {
case <-t.drainChan:
case <-timer.C:
case <-t.shutdownChan:
return
}
t.controlBuf.put(&goAway{code: i.code, debugData: i.debugData})
}()
case *flushIO:
t.framer.flushWrite()
case *ping:
if !i.ack {
t.bdpEst.timesnap(i.data)
}
t.framer.writePing(true, i.ack, i.data)
default:
errorf("transport: http2Server.controller got unexpected item type %v\n", i)
}
t.writableChan <- 0
continue
case <-t.shutdownChan:
case <-t.drainChan:
case <-timer.C:
case <-t.ctx.Done():
return
}
case <-t.shutdownChan:
return
t.controlBuf.put(&goAway{code: i.code, debugData: i.debugData})
}()
return nil
case *flushIO:
return t.framer.writer.Flush()
case *ping:
if !i.ack {
t.bdpEst.timesnap(i.data)
}
return t.framer.fr.WritePing(i.ack, i.data)
default:
err := status.Errorf(codes.Internal, "transport: http2Server.controller got unexpected item type %t", i)
errorf("%v", err)
return err
}
}
// Close starts shutting down the http2Server transport.
// TODO(zhaoq): Now the destruction is not blocked on any pending streams. This
// could cause some resource issue. Revisit this later.
func (t *http2Server) Close() (err error) {
func (t *http2Server) Close() error {
t.mu.Lock()
if t.state == closing {
t.mu.Unlock()
@ -1153,8 +1119,8 @@ func (t *http2Server) Close() (err error) {
streams := t.activeStreams
t.activeStreams = nil
t.mu.Unlock()
close(t.shutdownChan)
err = t.conn.Close()
t.cancel()
err := t.conn.Close()
// Cancel all active streams.
for _, s := range streams {
s.cancel()
@ -1163,7 +1129,7 @@ func (t *http2Server) Close() (err error) {
connEnd := &stats.ConnEnd{}
t.stats.HandleConn(t.ctx, connEnd)
}
return
return err
}
// closeStream clears the footprint of a stream when the stream is not needed

139
cmd/vendor/google.golang.org/grpc/transport/http_util.go generated vendored
View File

@ -28,7 +28,6 @@ import (
"net/http"
"strconv"
"strings"
"sync/atomic"
"time"
"github.com/golang/protobuf/proto"
@ -45,7 +44,8 @@ const (
// http://http2.github.io/http2-spec/#SettingValues
http2InitHeaderTableSize = 4096
// http2IOBufSize specifies the buffer size for sending frames.
http2IOBufSize = 32 * 1024
defaultWriteBufSize = 32 * 1024
defaultReadBufSize = 32 * 1024
)
var (
@ -475,10 +475,10 @@ type framer struct {
fr *http2.Framer
}
func newFramer(conn net.Conn) *framer {
func newFramer(conn net.Conn, writeBufferSize, readBufferSize int) *framer {
f := &framer{
reader: bufio.NewReaderSize(conn, http2IOBufSize),
writer: bufio.NewWriterSize(conn, http2IOBufSize),
reader: bufio.NewReaderSize(conn, readBufferSize),
writer: bufio.NewWriterSize(conn, writeBufferSize),
}
f.fr = http2.NewFramer(f.writer, f.reader)
// Opt-in to Frame reuse API on framer to reduce garbage.
@ -487,132 +487,3 @@ func newFramer(conn net.Conn) *framer {
f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil)
return f
}
func (f *framer) adjustNumWriters(i int32) int32 {
return atomic.AddInt32(&f.numWriters, i)
}
// The following writeXXX functions can only be called when the caller gets
// unblocked from writableChan channel (i.e., owns the privilege to write).
func (f *framer) writeContinuation(forceFlush bool, streamID uint32, endHeaders bool, headerBlockFragment []byte) error {
if err := f.fr.WriteContinuation(streamID, endHeaders, headerBlockFragment); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeData(forceFlush bool, streamID uint32, endStream bool, data []byte) error {
if err := f.fr.WriteData(streamID, endStream, data); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeGoAway(forceFlush bool, maxStreamID uint32, code http2.ErrCode, debugData []byte) error {
if err := f.fr.WriteGoAway(maxStreamID, code, debugData); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeHeaders(forceFlush bool, p http2.HeadersFrameParam) error {
if err := f.fr.WriteHeaders(p); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writePing(forceFlush, ack bool, data [8]byte) error {
if err := f.fr.WritePing(ack, data); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writePriority(forceFlush bool, streamID uint32, p http2.PriorityParam) error {
if err := f.fr.WritePriority(streamID, p); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writePushPromise(forceFlush bool, p http2.PushPromiseParam) error {
if err := f.fr.WritePushPromise(p); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeRSTStream(forceFlush bool, streamID uint32, code http2.ErrCode) error {
if err := f.fr.WriteRSTStream(streamID, code); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeSettings(forceFlush bool, settings ...http2.Setting) error {
if err := f.fr.WriteSettings(settings...); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeSettingsAck(forceFlush bool) error {
if err := f.fr.WriteSettingsAck(); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeWindowUpdate(forceFlush bool, streamID, incr uint32) error {
if err := f.fr.WriteWindowUpdate(streamID, incr); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) flushWrite() error {
return f.writer.Flush()
}
func (f *framer) readFrame() (http2.Frame, error) {
return f.fr.ReadFrame()
}
func (f *framer) errorDetail() error {
return f.fr.ErrorDetail()
}

117
cmd/vendor/google.golang.org/grpc/transport/transport.go generated vendored
View File

@ -21,10 +21,12 @@
package transport // import "google.golang.org/grpc/transport"
import (
stdctx "context"
"fmt"
"io"
"net"
"sync"
"time"
"golang.org/x/net/context"
"golang.org/x/net/http2"
@ -67,20 +69,20 @@ func newRecvBuffer() *recvBuffer {
func (b *recvBuffer) put(r recvMsg) {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) == 0 {
select {
case b.c <- r:
b.mu.Unlock()
return
default:
}
}
b.backlog = append(b.backlog, r)
b.mu.Unlock()
}
func (b *recvBuffer) load() {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) > 0 {
select {
case b.c <- b.backlog[0]:
@ -89,6 +91,7 @@ func (b *recvBuffer) load() {
default:
}
}
b.mu.Unlock()
}
// get returns the channel that receives a recvMsg in the buffer.
@ -164,20 +167,20 @@ func newControlBuffer() *controlBuffer {
func (b *controlBuffer) put(r item) {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) == 0 {
select {
case b.c <- r:
b.mu.Unlock()
return
default:
}
}
b.backlog = append(b.backlog, r)
b.mu.Unlock()
}
func (b *controlBuffer) load() {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) > 0 {
select {
case b.c <- b.backlog[0]:
@ -186,6 +189,7 @@ func (b *controlBuffer) load() {
default:
}
}
b.mu.Unlock()
}
// get returns the channel that receives an item in the buffer.
@ -235,7 +239,8 @@ type Stream struct {
// is used to adjust flow control, if need be.
requestRead func(int)
sendQuotaPool *quotaPool
sendQuotaPool *quotaPool
localSendQuota *quotaPool
// Close headerChan to indicate the end of reception of header metadata.
headerChan chan struct{}
// header caches the received header metadata.
@ -313,8 +318,9 @@ func (s *Stream) Header() (metadata.MD, error) {
// side only.
func (s *Stream) Trailer() metadata.MD {
s.mu.RLock()
defer s.mu.RUnlock()
return s.trailer.Copy()
c := s.trailer.Copy()
s.mu.RUnlock()
return c
}
// ServerTransport returns the underlying ServerTransport for the stream.
@ -342,14 +348,16 @@ func (s *Stream) Status() *status.Status {
// Server side only.
func (s *Stream) SetHeader(md metadata.MD) error {
s.mu.Lock()
defer s.mu.Unlock()
if s.headerOk || s.state == streamDone {
s.mu.Unlock()
return ErrIllegalHeaderWrite
}
if md.Len() == 0 {
s.mu.Unlock()
return nil
}
s.header = metadata.Join(s.header, md)
s.mu.Unlock()
return nil
}
@ -360,8 +368,8 @@ func (s *Stream) SetTrailer(md metadata.MD) error {
return nil
}
s.mu.Lock()
defer s.mu.Unlock()
s.trailer = metadata.Join(s.trailer, md)
s.mu.Unlock()
return nil
}
@ -412,15 +420,17 @@ func (s *Stream) finish(st *status.Status) {
// BytesSent indicates whether any bytes have been sent on this stream.
func (s *Stream) BytesSent() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.bytesSent
bs := s.bytesSent
s.mu.Unlock()
return bs
}
// BytesReceived indicates whether any bytes have been received on this stream.
func (s *Stream) BytesReceived() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.bytesReceived
br := s.bytesReceived
s.mu.Unlock()
return br
}
// GoString is implemented by Stream so context.String() won't
@ -449,7 +459,6 @@ type transportState int
const (
reachable transportState = iota
unreachable
closing
draining
)
@ -464,6 +473,8 @@ type ServerConfig struct {
KeepalivePolicy keepalive.EnforcementPolicy
InitialWindowSize int32
InitialConnWindowSize int32
WriteBufferSize int
ReadBufferSize int
}
// NewServerTransport creates a ServerTransport with conn or non-nil error
@ -491,10 +502,14 @@ type ConnectOptions struct {
KeepaliveParams keepalive.ClientParameters
// StatsHandler stores the handler for stats.
StatsHandler stats.Handler
// InitialWindowSize sets the intial window size for a stream.
// InitialWindowSize sets the initial window size for a stream.
InitialWindowSize int32
// InitialConnWindowSize sets the intial window size for a connection.
// InitialConnWindowSize sets the initial window size for a connection.
InitialConnWindowSize int32
// WriteBufferSize sets the size of write buffer which in turn determines how much data can be batched before it's written on the wire.
WriteBufferSize int
// ReadBufferSize sets the size of read buffer, which in turn determines how much data can be read at most for one read syscall.
ReadBufferSize int
}
// TargetInfo contains the information of the target such as network address and metadata.
@ -505,8 +520,8 @@ type TargetInfo struct {
// NewClientTransport establishes the transport with the required ConnectOptions
// and returns it to the caller.
func NewClientTransport(ctx context.Context, target TargetInfo, opts ConnectOptions) (ClientTransport, error) {
return newHTTP2Client(ctx, target, opts)
func NewClientTransport(ctx context.Context, target TargetInfo, opts ConnectOptions, timeout time.Duration) (ClientTransport, error) {
return newHTTP2Client(ctx, target, opts, timeout)
}
// Options provides additional hints and information for message
@ -518,7 +533,7 @@ type Options struct {
// Delay is a hint to the transport implementation for whether
// the data could be buffered for a batching write. The
// Transport implementation may ignore the hint.
// transport implementation may ignore the hint.
Delay bool
}
@ -688,34 +703,33 @@ func (e StreamError) Error() string {
return fmt.Sprintf("stream error: code = %s desc = %q", e.Code, e.Desc)
}
// wait blocks until it can receive from ctx.Done, closing, or proceed.
// If it receives from ctx.Done, it returns 0, the StreamError for ctx.Err.
// If it receives from done, it returns 0, io.EOF if ctx is not done; otherwise
// it return the StreamError for ctx.Err.
// If it receives from goAway, it returns 0, ErrStreamDrain.
// If it receives from closing, it returns 0, ErrConnClosing.
// If it receives from proceed, it returns the received integer, nil.
func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-chan int) (int, error) {
// wait blocks until it can receive from one of the provided contexts or channels
func wait(ctx, tctx context.Context, done, goAway <-chan struct{}, proceed <-chan int) (int, error) {
select {
case <-ctx.Done():
return 0, ContextErr(ctx.Err())
case <-done:
// User cancellation has precedence.
select {
case <-ctx.Done():
return 0, ContextErr(ctx.Err())
default:
}
return 0, io.EOF
case <-goAway:
return 0, ErrStreamDrain
case <-closing:
case <-tctx.Done():
return 0, ErrConnClosing
case i := <-proceed:
return i, nil
}
}
// ContextErr converts the error from context package into a StreamError.
func ContextErr(err error) StreamError {
switch err {
case context.DeadlineExceeded, stdctx.DeadlineExceeded:
return streamErrorf(codes.DeadlineExceeded, "%v", err)
case context.Canceled, stdctx.Canceled:
return streamErrorf(codes.Canceled, "%v", err)
}
return streamErrorf(codes.Internal, "Unexpected error from context packet: %v", err)
}
// GoAwayReason contains the reason for the GoAway frame received.
type GoAwayReason uint8
@ -725,6 +739,39 @@ const (
// NoReason is the default value when GoAway frame is received.
NoReason GoAwayReason = 1
// TooManyPings indicates that a GoAway frame with ErrCodeEnhanceYourCalm
// was recieved and that the debug data said "too_many_pings".
// was received and that the debug data said "too_many_pings".
TooManyPings GoAwayReason = 2
)
// loopyWriter is run in a separate go routine. It is the single code path that will
// write data on wire.
func loopyWriter(ctx context.Context, cbuf *controlBuffer, handler func(item) error) {
for {
select {
case i := <-cbuf.get():
cbuf.load()
if err := handler(i); err != nil {
return
}
case <-ctx.Done():
return
}
hasData:
for {
select {
case i := <-cbuf.get():
cbuf.load()
if err := handler(i); err != nil {
return
}
case <-ctx.Done():
return
default:
if err := handler(&flushIO{}); err != nil {
return
}
break hasData
}
}
}
}

8
glide.lock generated
View File

@ -1,5 +1,5 @@
hash: cff74aae5a6b8c11816c9994dedfdfdcd9f4137d61d8ed8ba0bf623f0ff21d50
updated: 2017-11-10T09:46:28.3753-08:00
hash: 8d556efcf8d917aba74445bd98eb9de3abcf981ca70adb53276026c4c3ecfcfd
updated: 2017-11-10T12:07:01.187305-08:00
imports:
- name: github.com/beorn7/perks
version: 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9
@ -158,8 +158,9 @@ imports:
subpackages:
- googleapis/rpc/status
- name: google.golang.org/grpc
version: f92cdcd7dcdc69e81b2d7b338479a19a8723cfa3
version: 5ffe3083946d5603a0578721101dc8165b1d5b5f
subpackages:
- balancer
- codes
- connectivity
- credentials
@ -172,6 +173,7 @@ imports:
- metadata
- naming
- peer
- resolver
- stats
- status
- tap

2
glide.yaml
View File

@ -108,7 +108,7 @@ import:
subpackages:
- rate
- package: google.golang.org/grpc
version: v1.6.0
version: v1.7.2
subpackages:
- codes
- credentials