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// 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 v3rpc
import (
"context"
"strings"
pb "go.etcd.io/etcd/api/v3/etcdserverpb"
"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
"go.etcd.io/etcd/server/v3/auth"
"go.etcd.io/etcd/server/v3/etcdserver"
"go.etcd.io/etcd/server/v3/etcdserver/api/membership"
"go.etcd.io/etcd/server/v3/lease"
"go.etcd.io/etcd/server/v3/mvcc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var toGRPCErrorMap = map[error]error{
membership.ErrIDRemoved: rpctypes.ErrGRPCMemberNotFound,
membership.ErrIDNotFound: rpctypes.ErrGRPCMemberNotFound,
membership.ErrIDExists: rpctypes.ErrGRPCMemberExist,
membership.ErrPeerURLexists: rpctypes.ErrGRPCPeerURLExist,
membership.ErrMemberNotLearner: rpctypes.ErrGRPCMemberNotLearner,
membership.ErrTooManyLearners: rpctypes.ErrGRPCTooManyLearners,
etcdserver.ErrNotEnoughStartedMembers: rpctypes.ErrMemberNotEnoughStarted,
etcdserver.ErrLearnerNotReady: rpctypes.ErrGRPCLearnerNotReady,
mvcc.ErrCompacted: rpctypes.ErrGRPCCompacted,
mvcc.ErrFutureRev: rpctypes.ErrGRPCFutureRev,
etcdserver.ErrRequestTooLarge: rpctypes.ErrGRPCRequestTooLarge,
etcdserver.ErrNoSpace: rpctypes.ErrGRPCNoSpace,
etcdserver.ErrTooManyRequests: rpctypes.ErrTooManyRequests,
etcdserver.ErrNoLeader: rpctypes.ErrGRPCNoLeader,
etcdserver.ErrNotLeader: rpctypes.ErrGRPCNotLeader,
etcdserver.ErrLeaderChanged: rpctypes.ErrGRPCLeaderChanged,
etcdserver.ErrStopped: rpctypes.ErrGRPCStopped,
etcdserver.ErrTimeout: rpctypes.ErrGRPCTimeout,
etcdserver.ErrTimeoutDueToLeaderFail: rpctypes.ErrGRPCTimeoutDueToLeaderFail,
etcdserver.ErrTimeoutDueToConnectionLost: rpctypes.ErrGRPCTimeoutDueToConnectionLost,
etcdserver.ErrTimeoutWaitAppliedIndex: rpctypes.ErrGRPCTimeoutWaitAppliedIndex,
etcdserver.ErrUnhealthy: rpctypes.ErrGRPCUnhealthy,
etcdserver.ErrKeyNotFound: rpctypes.ErrGRPCKeyNotFound,
etcdserver.ErrCorrupt: rpctypes.ErrGRPCCorrupt,
etcdserver.ErrBadLeaderTransferee: rpctypes.ErrGRPCBadLeaderTransferee,
etcdserver.ErrClusterVersionUnavailable: rpctypes.ErrGRPCClusterVersionUnavailable,
etcdserver.ErrWrongDowngradeVersionFormat: rpctypes.ErrGRPCWrongDowngradeVersionFormat,
etcdserver.ErrInvalidDowngradeTargetVersion: rpctypes.ErrGRPCInvalidDowngradeTargetVersion,
etcdserver.ErrDowngradeInProcess: rpctypes.ErrGRPCDowngradeInProcess,
etcdserver.ErrNoInflightDowngrade: rpctypes.ErrGRPCNoInflightDowngrade,
lease.ErrLeaseNotFound: rpctypes.ErrGRPCLeaseNotFound,
lease.ErrLeaseExists: rpctypes.ErrGRPCLeaseExist,
lease.ErrLeaseTTLTooLarge: rpctypes.ErrGRPCLeaseTTLTooLarge,
auth.ErrRootUserNotExist: rpctypes.ErrGRPCRootUserNotExist,
auth.ErrRootRoleNotExist: rpctypes.ErrGRPCRootRoleNotExist,
auth.ErrUserAlreadyExist: rpctypes.ErrGRPCUserAlreadyExist,
auth.ErrUserEmpty: rpctypes.ErrGRPCUserEmpty,
auth.ErrUserNotFound: rpctypes.ErrGRPCUserNotFound,
auth.ErrRoleAlreadyExist: rpctypes.ErrGRPCRoleAlreadyExist,
auth.ErrRoleNotFound: rpctypes.ErrGRPCRoleNotFound,
auth.ErrRoleEmpty: rpctypes.ErrGRPCRoleEmpty,
auth.ErrAuthFailed: rpctypes.ErrGRPCAuthFailed,
auth.ErrPermissionNotGiven: rpctypes.ErrGRPCPermissionNotGiven,
auth.ErrPermissionDenied: rpctypes.ErrGRPCPermissionDenied,
auth.ErrRoleNotGranted: rpctypes.ErrGRPCRoleNotGranted,
auth.ErrPermissionNotGranted: rpctypes.ErrGRPCPermissionNotGranted,
auth.ErrAuthNotEnabled: rpctypes.ErrGRPCAuthNotEnabled,
auth.ErrInvalidAuthToken: rpctypes.ErrGRPCInvalidAuthToken,
auth.ErrInvalidAuthMgmt: rpctypes.ErrGRPCInvalidAuthMgmt,
auth.ErrAuthOldRevision: rpctypes.ErrGRPCAuthOldRevision,
// In sync with status.FromContextError
context.Canceled: rpctypes.ErrGRPCCanceled,
context.DeadlineExceeded: rpctypes.ErrGRPCDeadlineExceeded,
}
func togRPCError(err error) error {
// let gRPC server convert to codes.Canceled, codes.DeadlineExceeded
if err == context.Canceled || err == context.DeadlineExceeded {
return err
}
grpcErr, ok := toGRPCErrorMap[err]
if !ok {
return status.Error(codes.Unknown, err.Error())
}
return grpcErr
}
func isClientCtxErr(ctxErr error, err error) bool {
if ctxErr != nil {
return true
}
ev, ok := status.FromError(err)
if !ok {
return false
}
switch ev.Code() {
case codes.Canceled, codes.DeadlineExceeded:
// client-side context cancel or deadline exceeded
// "rpc error: code = Canceled desc = context canceled"
// "rpc error: code = DeadlineExceeded desc = context deadline exceeded"
return true
case codes.Unavailable:
msg := ev.Message()
// client-side context cancel or deadline exceeded with TLS ("http2.errClientDisconnected")
// "rpc error: code = Unavailable desc = client disconnected"
if msg == "client disconnected" {
return true
}
// "grpc/transport.ClientTransport.CloseStream" on canceled streams
// "rpc error: code = Unavailable desc = stream error: stream ID 21; CANCEL")
if strings.HasPrefix(msg, "stream error: ") && strings.HasSuffix(msg, "; CANCEL") {
return true
}
}
return false
}
// in v3.4, learner is allowed to serve serializable read and endpoint status
func isRPCSupportedForLearner(req interface{}) bool {
switch r := req.(type) {
case *pb.StatusRequest:
return true
case *pb.RangeRequest:
return r.Serializable
default:
return false
}
}
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