vendor update for CSI 0.3.0

vendor/google.golang.org/grpc/resolver/dns/dns_resolver.go

@@ -24,7 +24,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"math/rand"
 	"net"
 	"os"
 	"strconv"
@@ -34,6 +33,7 @@ import (
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal/grpcrand"
 	"google.golang.org/grpc/resolver"
 )
 
@@ -50,7 +50,9 @@ const (
 	txtAttribute = "grpc_config="
 )
 
-var errMissingAddr = errors.New("missing address")
+var (
+	errMissingAddr = errors.New("missing address")
+)
 
 // NewBuilder creates a dnsBuilder which is used to factory DNS resolvers.
 func NewBuilder() resolver.Builder {
@@ -64,6 +66,9 @@ type dnsBuilder struct {
 
 // Build creates and starts a DNS resolver that watches the name resolution of the target.
 func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
+	if target.Authority != "" {
+		return nil, fmt.Errorf("Default DNS resolver does not support custom DNS server")
+	}
 	host, port, err := parseTarget(target.Endpoint)
 	if err != nil {
 		return nil, err
@@ -87,14 +92,15 @@ func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts
 	// DNS address (non-IP).
 	ctx, cancel := context.WithCancel(context.Background())
 	d := &dnsResolver{
-		freq:   b.freq,
-		host:   host,
-		port:   port,
-		ctx:    ctx,
-		cancel: cancel,
-		cc:     cc,
-		t:      time.NewTimer(0),
-		rn:     make(chan struct{}, 1),
+		freq:                 b.freq,
+		host:                 host,
+		port:                 port,
+		ctx:                  ctx,
+		cancel:               cancel,
+		cc:                   cc,
+		t:                    time.NewTimer(0),
+		rn:                   make(chan struct{}, 1),
+		disableServiceConfig: opts.DisableServiceConfig,
 	}
 
 	d.wg.Add(1)
@@ -157,7 +163,8 @@ type dnsResolver struct {
 	// If Close() doesn't wait for watcher() goroutine finishes, race detector sometimes
 	// will warns lookup (READ the lookup function pointers) inside watcher() goroutine
 	// has data race with replaceNetFunc (WRITE the lookup function pointers).
-	wg sync.WaitGroup
+	wg                   sync.WaitGroup
+	disableServiceConfig bool
 }
 
 // ResolveNow invoke an immediate resolution of the target that this dnsResolver watches.
@@ -187,7 +194,7 @@ func (d *dnsResolver) watcher() {
 		result, sc := d.lookup()
 		// Next lookup should happen after an interval defined by d.freq.
 		d.t.Reset(d.freq)
-		d.cc.NewServiceConfig(string(sc))
+		d.cc.NewServiceConfig(sc)
 		d.cc.NewAddress(result)
 	}
 }
@@ -202,7 +209,7 @@ func (d *dnsResolver) lookupSRV() []resolver.Address {
 	for _, s := range srvs {
 		lbAddrs, err := lookupHost(d.ctx, s.Target)
 		if err != nil {
-			grpclog.Warningf("grpc: failed load banlacer address dns lookup due to %v.\n", err)
+			grpclog.Infof("grpc: failed load balancer address dns lookup due to %v.\n", err)
 			continue
 		}
 		for _, a := range lbAddrs {
@@ -221,7 +228,7 @@ func (d *dnsResolver) lookupSRV() []resolver.Address {
 func (d *dnsResolver) lookupTXT() string {
 	ss, err := lookupTXT(d.ctx, d.host)
 	if err != nil {
-		grpclog.Warningf("grpc: failed dns TXT record lookup due to %v.\n", err)
+		grpclog.Infof("grpc: failed dns TXT record lookup due to %v.\n", err)
 		return ""
 	}
 	var res string
@@ -257,10 +264,12 @@ func (d *dnsResolver) lookupHost() []resolver.Address {
 }
 
 func (d *dnsResolver) lookup() ([]resolver.Address, string) {
-	var newAddrs []resolver.Address
-	newAddrs = d.lookupSRV()
+	newAddrs := d.lookupSRV()
 	// Support fallback to non-balancer address.
 	newAddrs = append(newAddrs, d.lookupHost()...)
+	if d.disableServiceConfig {
+		return newAddrs, ""
+	}
 	sc := d.lookupTXT()
 	return newAddrs, canaryingSC(sc)
 }
@@ -339,12 +348,7 @@ func chosenByPercentage(a *int) bool {
 	if a == nil {
 		return true
 	}
-	s := rand.NewSource(time.Now().UnixNano())
-	r := rand.New(s)
-	if r.Intn(100)+1 > *a {
-		return false
-	}
-	return true
+	return grpcrand.Intn(100)+1 <= *a
 }
 
 func canaryingSC(js string) string {

vendor/google.golang.org/grpc/resolver/dns/dns_resolver_test.go

@@ -27,8 +27,8 @@ import (
 	"testing"
 	"time"
 
+	"google.golang.org/grpc/internal/leakcheck"
 	"google.golang.org/grpc/resolver"
-	"google.golang.org/grpc/test/leakcheck"
 )
 
 func TestMain(m *testing.M) {
@@ -892,3 +892,45 @@ func TestResolveFunc(t *testing.T) {
 		}
 	}
 }
+
+func TestDisableServiceConfig(t *testing.T) {
+	defer leakcheck.Check(t)
+	tests := []struct {
+		target               string
+		scWant               string
+		disableServiceConfig bool
+	}{
+		{
+			"foo.bar.com",
+			generateSC("foo.bar.com"),
+			false,
+		},
+		{
+			"foo.bar.com",
+			"",
+			true,
+		},
+	}
+
+	for _, a := range tests {
+		b := NewBuilder()
+		cc := &testClientConn{target: a.target}
+		r, err := b.Build(resolver.Target{Endpoint: a.target}, cc, resolver.BuildOption{DisableServiceConfig: a.disableServiceConfig})
+		if err != nil {
+			t.Fatalf("%v\n", err)
+		}
+		var cnt int
+		var sc string
+		for {
+			sc, cnt = cc.getSc()
+			if cnt > 0 {
+				break
+			}
+			time.Sleep(time.Millisecond)
+		}
+		if !reflect.DeepEqual(a.scWant, sc) {
+			t.Errorf("Resolved service config of target: %q = %+v, want %+v\n", a.target, sc, a.scWant)
+		}
+		r.Close()
+	}
+}

vendor/google.golang.org/grpc/resolver/manual/manual.go

@@ -81,7 +81,7 @@ func (r *Resolver) NewServiceConfig(sc string) {
 }
 
 // GenerateAndRegisterManualResolver generates a random scheme and a Resolver
-// with it. It also regieter this Resolver.
+// with it. It also registers this Resolver.
 // It returns the Resolver and a cleanup function to unregister it.
 func GenerateAndRegisterManualResolver() (*Resolver, func()) {
 	scheme := strconv.FormatInt(time.Now().UnixNano(), 36)

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

@@ -29,28 +29,23 @@ var (
 
 // 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.
+// Register registers the resolver builder to the resolver map. b.Scheme will be
+// used as the scheme registered with this builder.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe. If multiple Resolvers are
+// registered with the same name, the one registered last will take effect.
 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, "passthrough" 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.
+//
+// If no builder is register 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
 }
 
@@ -60,6 +55,11 @@ func SetDefaultScheme(scheme string) {
 	defaultScheme = scheme
 }
 
+// GetDefaultScheme gets the default scheme that will be used.
+func GetDefaultScheme() string {
+	return defaultScheme
+}
+
 // AddressType indicates the address type returned by name resolution.
 type AddressType uint8
 
@@ -90,6 +90,8 @@ type Address struct {
 // BuildOption includes additional information for the builder to create
 // the resolver.
 type BuildOption struct {
+	// DisableServiceConfig indicates whether resolver should fetch service config data.
+	DisableServiceConfig bool
 }
 
 // ClientConn contains the callbacks for resolver to notify any updates