diff options
author | dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com> | 2021-02-09 09:17:50 +0000 |
---|---|---|
committer | Daniel J Walsh <dwalsh@redhat.com> | 2021-02-09 10:49:43 -0500 |
commit | 08d8290f1d65a254b6794f7fe87a6f769b2ca792 (patch) | |
tree | 1cb56c15d412d1d20226d1486bbd05656a3106e5 /vendor/google.golang.org/grpc/resolver_conn_wrapper.go | |
parent | 19507d0ffe8cda0a69f056838556f471fd9e61fa (diff) | |
download | podman-08d8290f1d65a254b6794f7fe87a6f769b2ca792.tar.gz podman-08d8290f1d65a254b6794f7fe87a6f769b2ca792.tar.bz2 podman-08d8290f1d65a254b6794f7fe87a6f769b2ca792.zip |
Bump github.com/containers/ocicrypt from 1.0.3 to 1.1.0
Bumps [github.com/containers/ocicrypt](https://github.com/containers/ocicrypt) from 1.0.3 to 1.1.0.
- [Release notes](https://github.com/containers/ocicrypt/releases)
- [Commits](https://github.com/containers/ocicrypt/compare/v1.0.3...v1.1.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Diffstat (limited to 'vendor/google.golang.org/grpc/resolver_conn_wrapper.go')
-rw-r--r-- | vendor/google.golang.org/grpc/resolver_conn_wrapper.go | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/vendor/google.golang.org/grpc/resolver_conn_wrapper.go b/vendor/google.golang.org/grpc/resolver_conn_wrapper.go new file mode 100644 index 000000000..f2d81968f --- /dev/null +++ b/vendor/google.golang.org/grpc/resolver_conn_wrapper.go @@ -0,0 +1,222 @@ +/* + * + * 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 ( + "fmt" + "strings" + "sync" + "time" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/grpcsync" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/serviceconfig" +) + +// ccResolverWrapper is a wrapper on top of cc for resolvers. +// It implements resolver.ClientConn interface. +type ccResolverWrapper struct { + cc *ClientConn + resolverMu sync.Mutex + resolver resolver.Resolver + done *grpcsync.Event + curState resolver.State + + pollingMu sync.Mutex + polling chan struct{} +} + +// newCCResolverWrapper uses the resolver.Builder to build a Resolver and +// returns a ccResolverWrapper object which wraps the newly built resolver. +func newCCResolverWrapper(cc *ClientConn, rb resolver.Builder) (*ccResolverWrapper, error) { + ccr := &ccResolverWrapper{ + cc: cc, + done: grpcsync.NewEvent(), + } + + var credsClone credentials.TransportCredentials + if creds := cc.dopts.copts.TransportCredentials; creds != nil { + credsClone = creds.Clone() + } + rbo := resolver.BuildOptions{ + DisableServiceConfig: cc.dopts.disableServiceConfig, + DialCreds: credsClone, + CredsBundle: cc.dopts.copts.CredsBundle, + Dialer: cc.dopts.copts.Dialer, + } + + var err error + // We need to hold the lock here while we assign to the ccr.resolver field + // to guard against a data race caused by the following code path, + // rb.Build-->ccr.ReportError-->ccr.poll-->ccr.resolveNow, would end up + // accessing ccr.resolver which is being assigned here. + ccr.resolverMu.Lock() + defer ccr.resolverMu.Unlock() + ccr.resolver, err = rb.Build(cc.parsedTarget, ccr, rbo) + if err != nil { + return nil, err + } + return ccr, nil +} + +func (ccr *ccResolverWrapper) resolveNow(o resolver.ResolveNowOptions) { + ccr.resolverMu.Lock() + if !ccr.done.HasFired() { + ccr.resolver.ResolveNow(o) + } + ccr.resolverMu.Unlock() +} + +func (ccr *ccResolverWrapper) close() { + ccr.resolverMu.Lock() + ccr.resolver.Close() + ccr.done.Fire() + ccr.resolverMu.Unlock() +} + +// poll begins or ends asynchronous polling of the resolver based on whether +// err is ErrBadResolverState. +func (ccr *ccResolverWrapper) poll(err error) { + ccr.pollingMu.Lock() + defer ccr.pollingMu.Unlock() + if err != balancer.ErrBadResolverState { + // stop polling + if ccr.polling != nil { + close(ccr.polling) + ccr.polling = nil + } + return + } + if ccr.polling != nil { + // already polling + return + } + p := make(chan struct{}) + ccr.polling = p + go func() { + for i := 0; ; i++ { + ccr.resolveNow(resolver.ResolveNowOptions{}) + t := time.NewTimer(ccr.cc.dopts.resolveNowBackoff(i)) + select { + case <-p: + t.Stop() + return + case <-ccr.done.Done(): + // Resolver has been closed. + t.Stop() + return + case <-t.C: + select { + case <-p: + return + default: + } + // Timer expired; re-resolve. + } + } + }() +} + +func (ccr *ccResolverWrapper) UpdateState(s resolver.State) { + if ccr.done.HasFired() { + return + } + channelz.Infof(logger, ccr.cc.channelzID, "ccResolverWrapper: sending update to cc: %v", s) + if channelz.IsOn() { + ccr.addChannelzTraceEvent(s) + } + ccr.curState = s + ccr.poll(ccr.cc.updateResolverState(ccr.curState, nil)) +} + +func (ccr *ccResolverWrapper) ReportError(err error) { + if ccr.done.HasFired() { + return + } + channelz.Warningf(logger, ccr.cc.channelzID, "ccResolverWrapper: reporting error to cc: %v", err) + ccr.poll(ccr.cc.updateResolverState(resolver.State{}, err)) +} + +// NewAddress is called by the resolver implementation to send addresses to gRPC. +func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) { + if ccr.done.HasFired() { + return + } + channelz.Infof(logger, ccr.cc.channelzID, "ccResolverWrapper: sending new addresses to cc: %v", addrs) + if channelz.IsOn() { + ccr.addChannelzTraceEvent(resolver.State{Addresses: addrs, ServiceConfig: ccr.curState.ServiceConfig}) + } + ccr.curState.Addresses = addrs + ccr.poll(ccr.cc.updateResolverState(ccr.curState, nil)) +} + +// NewServiceConfig is called by the resolver implementation to send service +// configs to gRPC. +func (ccr *ccResolverWrapper) NewServiceConfig(sc string) { + if ccr.done.HasFired() { + return + } + channelz.Infof(logger, ccr.cc.channelzID, "ccResolverWrapper: got new service config: %v", sc) + if ccr.cc.dopts.disableServiceConfig { + channelz.Info(logger, ccr.cc.channelzID, "Service config lookups disabled; ignoring config") + return + } + scpr := parseServiceConfig(sc) + if scpr.Err != nil { + channelz.Warningf(logger, ccr.cc.channelzID, "ccResolverWrapper: error parsing service config: %v", scpr.Err) + ccr.poll(balancer.ErrBadResolverState) + return + } + if channelz.IsOn() { + ccr.addChannelzTraceEvent(resolver.State{Addresses: ccr.curState.Addresses, ServiceConfig: scpr}) + } + ccr.curState.ServiceConfig = scpr + ccr.poll(ccr.cc.updateResolverState(ccr.curState, nil)) +} + +func (ccr *ccResolverWrapper) ParseServiceConfig(scJSON string) *serviceconfig.ParseResult { + return parseServiceConfig(scJSON) +} + +func (ccr *ccResolverWrapper) addChannelzTraceEvent(s resolver.State) { + var updates []string + var oldSC, newSC *ServiceConfig + var oldOK, newOK bool + if ccr.curState.ServiceConfig != nil { + oldSC, oldOK = ccr.curState.ServiceConfig.Config.(*ServiceConfig) + } + if s.ServiceConfig != nil { + newSC, newOK = s.ServiceConfig.Config.(*ServiceConfig) + } + if oldOK != newOK || (oldOK && newOK && oldSC.rawJSONString != newSC.rawJSONString) { + updates = append(updates, "service config updated") + } + if len(ccr.curState.Addresses) > 0 && len(s.Addresses) == 0 { + updates = append(updates, "resolver returned an empty address list") + } else if len(ccr.curState.Addresses) == 0 && len(s.Addresses) > 0 { + updates = append(updates, "resolver returned new addresses") + } + channelz.AddTraceEvent(logger, ccr.cc.channelzID, 0, &channelz.TraceEventDesc{ + Desc: fmt.Sprintf("Resolver state updated: %+v (%v)", s, strings.Join(updates, "; ")), + Severity: channelz.CtInfo, + }) +} |