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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 etcdserver
import (
"bytes"
"context"
"sort"
"time"
"github.com/coreos/etcd/auth"
pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
"github.com/coreos/etcd/lease"
"github.com/coreos/etcd/mvcc"
"github.com/coreos/etcd/mvcc/mvccpb"
"github.com/coreos/etcd/pkg/types"
"github.com/gogo/protobuf/proto"
)
const (
warnApplyDuration = 100 * time.Millisecond
)
type applyResult struct {
resp proto.Message
err error
// physc signals the physical effect of the request has completed in addition
// to being logically reflected by the node. Currently only used for
// Compaction requests.
physc <-chan struct{}
}
// applierV3 is the interface for processing V3 raft messages
type applierV3 interface {
Apply(r *pb.InternalRaftRequest) *applyResult
Put(txn mvcc.TxnWrite, p *pb.PutRequest) (*pb.PutResponse, error)
Range(txn mvcc.TxnRead, r *pb.RangeRequest) (*pb.RangeResponse, error)
DeleteRange(txn mvcc.TxnWrite, dr *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error)
Txn(rt *pb.TxnRequest) (*pb.TxnResponse, error)
Compaction(compaction *pb.CompactionRequest) (*pb.CompactionResponse, <-chan struct{}, error)
LeaseGrant(lc *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error)
LeaseRevoke(lc *pb.LeaseRevokeRequest) (*pb.LeaseRevokeResponse, error)
Alarm(*pb.AlarmRequest) (*pb.AlarmResponse, error)
Authenticate(r *pb.InternalAuthenticateRequest) (*pb.AuthenticateResponse, error)
AuthEnable() (*pb.AuthEnableResponse, error)
AuthDisable() (*pb.AuthDisableResponse, error)
UserAdd(ua *pb.AuthUserAddRequest) (*pb.AuthUserAddResponse, error)
UserDelete(ua *pb.AuthUserDeleteRequest) (*pb.AuthUserDeleteResponse, error)
UserChangePassword(ua *pb.AuthUserChangePasswordRequest) (*pb.AuthUserChangePasswordResponse, error)
UserGrantRole(ua *pb.AuthUserGrantRoleRequest) (*pb.AuthUserGrantRoleResponse, error)
UserGet(ua *pb.AuthUserGetRequest) (*pb.AuthUserGetResponse, error)
UserRevokeRole(ua *pb.AuthUserRevokeRoleRequest) (*pb.AuthUserRevokeRoleResponse, error)
RoleAdd(ua *pb.AuthRoleAddRequest) (*pb.AuthRoleAddResponse, error)
RoleGrantPermission(ua *pb.AuthRoleGrantPermissionRequest) (*pb.AuthRoleGrantPermissionResponse, error)
RoleGet(ua *pb.AuthRoleGetRequest) (*pb.AuthRoleGetResponse, error)
RoleRevokePermission(ua *pb.AuthRoleRevokePermissionRequest) (*pb.AuthRoleRevokePermissionResponse, error)
RoleDelete(ua *pb.AuthRoleDeleteRequest) (*pb.AuthRoleDeleteResponse, error)
UserList(ua *pb.AuthUserListRequest) (*pb.AuthUserListResponse, error)
RoleList(ua *pb.AuthRoleListRequest) (*pb.AuthRoleListResponse, error)
}
type checkReqFunc func(mvcc.ReadView, *pb.RequestOp) error
type applierV3backend struct {
s *EtcdServer
checkPut checkReqFunc
checkRange checkReqFunc
}
func (s *EtcdServer) newApplierV3Backend() applierV3 {
base := &applierV3backend{s: s}
base.checkPut = func(rv mvcc.ReadView, req *pb.RequestOp) error {
return base.checkRequestPut(rv, req)
}
base.checkRange = func(rv mvcc.ReadView, req *pb.RequestOp) error {
return base.checkRequestRange(rv, req)
}
return base
}
func (s *EtcdServer) newApplierV3() applierV3 {
return newAuthApplierV3(
s.AuthStore(),
newQuotaApplierV3(s, s.newApplierV3Backend()),
s.lessor,
)
}
func (a *applierV3backend) Apply(r *pb.InternalRaftRequest) *applyResult {
ar := &applyResult{}
defer func(start time.Time) {
warnOfExpensiveRequest(start, &pb.InternalRaftStringer{Request: r}, ar.resp, ar.err)
if ar.err != nil {
warnOfFailedRequest(start, &pb.InternalRaftStringer{Request: r}, ar.resp, ar.err)
}
}(time.Now())
// call into a.s.applyV3.F instead of a.F so upper appliers can check individual calls
switch {
case r.Range != nil:
ar.resp, ar.err = a.s.applyV3.Range(nil, r.Range)
case r.Put != nil:
ar.resp, ar.err = a.s.applyV3.Put(nil, r.Put)
case r.DeleteRange != nil:
ar.resp, ar.err = a.s.applyV3.DeleteRange(nil, r.DeleteRange)
case r.Txn != nil:
ar.resp, ar.err = a.s.applyV3.Txn(r.Txn)
case r.Compaction != nil:
ar.resp, ar.physc, ar.err = a.s.applyV3.Compaction(r.Compaction)
case r.LeaseGrant != nil:
ar.resp, ar.err = a.s.applyV3.LeaseGrant(r.LeaseGrant)
case r.LeaseRevoke != nil:
ar.resp, ar.err = a.s.applyV3.LeaseRevoke(r.LeaseRevoke)
case r.Alarm != nil:
ar.resp, ar.err = a.s.applyV3.Alarm(r.Alarm)
case r.Authenticate != nil:
ar.resp, ar.err = a.s.applyV3.Authenticate(r.Authenticate)
case r.AuthEnable != nil:
ar.resp, ar.err = a.s.applyV3.AuthEnable()
case r.AuthDisable != nil:
ar.resp, ar.err = a.s.applyV3.AuthDisable()
case r.AuthUserAdd != nil:
ar.resp, ar.err = a.s.applyV3.UserAdd(r.AuthUserAdd)
case r.AuthUserDelete != nil:
ar.resp, ar.err = a.s.applyV3.UserDelete(r.AuthUserDelete)
case r.AuthUserChangePassword != nil:
ar.resp, ar.err = a.s.applyV3.UserChangePassword(r.AuthUserChangePassword)
case r.AuthUserGrantRole != nil:
ar.resp, ar.err = a.s.applyV3.UserGrantRole(r.AuthUserGrantRole)
case r.AuthUserGet != nil:
ar.resp, ar.err = a.s.applyV3.UserGet(r.AuthUserGet)
case r.AuthUserRevokeRole != nil:
ar.resp, ar.err = a.s.applyV3.UserRevokeRole(r.AuthUserRevokeRole)
case r.AuthRoleAdd != nil:
ar.resp, ar.err = a.s.applyV3.RoleAdd(r.AuthRoleAdd)
case r.AuthRoleGrantPermission != nil:
ar.resp, ar.err = a.s.applyV3.RoleGrantPermission(r.AuthRoleGrantPermission)
case r.AuthRoleGet != nil:
ar.resp, ar.err = a.s.applyV3.RoleGet(r.AuthRoleGet)
case r.AuthRoleRevokePermission != nil:
ar.resp, ar.err = a.s.applyV3.RoleRevokePermission(r.AuthRoleRevokePermission)
case r.AuthRoleDelete != nil:
ar.resp, ar.err = a.s.applyV3.RoleDelete(r.AuthRoleDelete)
case r.AuthUserList != nil:
ar.resp, ar.err = a.s.applyV3.UserList(r.AuthUserList)
case r.AuthRoleList != nil:
ar.resp, ar.err = a.s.applyV3.RoleList(r.AuthRoleList)
default:
panic("not implemented")
}
return ar
}
func (a *applierV3backend) Put(txn mvcc.TxnWrite, p *pb.PutRequest) (resp *pb.PutResponse, err error) {
resp = &pb.PutResponse{}
resp.Header = &pb.ResponseHeader{}
val, leaseID := p.Value, lease.LeaseID(p.Lease)
if txn == nil {
if leaseID != lease.NoLease {
if l := a.s.lessor.Lookup(leaseID); l == nil {
return nil, lease.ErrLeaseNotFound
}
}
txn = a.s.KV().Write()
defer txn.End()
}
var rr *mvcc.RangeResult
if p.IgnoreValue || p.IgnoreLease || p.PrevKv {
rr, err = txn.Range(p.Key, nil, mvcc.RangeOptions{})
if err != nil {
return nil, err
}
}
if p.IgnoreValue || p.IgnoreLease {
if rr == nil || len(rr.KVs) == 0 {
// ignore_{lease,value} flag expects previous key-value pair
return nil, ErrKeyNotFound
}
}
if p.IgnoreValue {
val = rr.KVs[0].Value
}
if p.IgnoreLease {
leaseID = lease.LeaseID(rr.KVs[0].Lease)
}
if p.PrevKv {
if rr != nil && len(rr.KVs) != 0 {
resp.PrevKv = &rr.KVs[0]
}
}
resp.Header.Revision = txn.Put(p.Key, val, leaseID)
return resp, nil
}
func (a *applierV3backend) DeleteRange(txn mvcc.TxnWrite, dr *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error) {
resp := &pb.DeleteRangeResponse{}
resp.Header = &pb.ResponseHeader{}
end := mkGteRange(dr.RangeEnd)
if txn == nil {
txn = a.s.kv.Write()
defer txn.End()
}
if dr.PrevKv {
rr, err := txn.Range(dr.Key, end, mvcc.RangeOptions{})
if err != nil {
return nil, err
}
if rr != nil {
resp.PrevKvs = make([]*mvccpb.KeyValue, len(rr.KVs))
for i := range rr.KVs {
resp.PrevKvs[i] = &rr.KVs[i]
}
}
}
resp.Deleted, resp.Header.Revision = txn.DeleteRange(dr.Key, end)
return resp, nil
}
func (a *applierV3backend) Range(txn mvcc.TxnRead, r *pb.RangeRequest) (*pb.RangeResponse, error) {
resp := &pb.RangeResponse{}
resp.Header = &pb.ResponseHeader{}
if txn == nil {
txn = a.s.kv.Read()
defer txn.End()
}
limit := r.Limit
if r.SortOrder != pb.RangeRequest_NONE ||
r.MinModRevision != 0 || r.MaxModRevision != 0 ||
r.MinCreateRevision != 0 || r.MaxCreateRevision != 0 {
// fetch everything; sort and truncate afterwards
limit = 0
}
if limit > 0 {
// fetch one extra for 'more' flag
limit = limit + 1
}
ro := mvcc.RangeOptions{
Limit: limit,
Rev: r.Revision,
Count: r.CountOnly,
}
rr, err := txn.Range(r.Key, mkGteRange(r.RangeEnd), ro)
if err != nil {
return nil, err
}
if r.MaxModRevision != 0 {
f := func(kv *mvccpb.KeyValue) bool { return kv.ModRevision > r.MaxModRevision }
pruneKVs(rr, f)
}
if r.MinModRevision != 0 {
f := func(kv *mvccpb.KeyValue) bool { return kv.ModRevision < r.MinModRevision }
pruneKVs(rr, f)
}
if r.MaxCreateRevision != 0 {
f := func(kv *mvccpb.KeyValue) bool { return kv.CreateRevision > r.MaxCreateRevision }
pruneKVs(rr, f)
}
if r.MinCreateRevision != 0 {
f := func(kv *mvccpb.KeyValue) bool { return kv.CreateRevision < r.MinCreateRevision }
pruneKVs(rr, f)
}
sortOrder := r.SortOrder
if r.SortTarget != pb.RangeRequest_KEY && sortOrder == pb.RangeRequest_NONE {
// Since current mvcc.Range implementation returns results
// sorted by keys in lexiographically ascending order,
// sort ASCEND by default only when target is not 'KEY'
sortOrder = pb.RangeRequest_ASCEND
}
if sortOrder != pb.RangeRequest_NONE {
var sorter sort.Interface
switch {
case r.SortTarget == pb.RangeRequest_KEY:
sorter = &kvSortByKey{&kvSort{rr.KVs}}
case r.SortTarget == pb.RangeRequest_VERSION:
sorter = &kvSortByVersion{&kvSort{rr.KVs}}
case r.SortTarget == pb.RangeRequest_CREATE:
sorter = &kvSortByCreate{&kvSort{rr.KVs}}
case r.SortTarget == pb.RangeRequest_MOD:
sorter = &kvSortByMod{&kvSort{rr.KVs}}
case r.SortTarget == pb.RangeRequest_VALUE:
sorter = &kvSortByValue{&kvSort{rr.KVs}}
}
switch {
case sortOrder == pb.RangeRequest_ASCEND:
sort.Sort(sorter)
case sortOrder == pb.RangeRequest_DESCEND:
sort.Sort(sort.Reverse(sorter))
}
}
if r.Limit > 0 && len(rr.KVs) > int(r.Limit) {
rr.KVs = rr.KVs[:r.Limit]
resp.More = true
}
resp.Header.Revision = rr.Rev
resp.Count = int64(rr.Count)
resp.Kvs = make([]*mvccpb.KeyValue, len(rr.KVs))
for i := range rr.KVs {
if r.KeysOnly {
rr.KVs[i].Value = nil
}
resp.Kvs[i] = &rr.KVs[i]
}
return resp, nil
}
func (a *applierV3backend) Txn(rt *pb.TxnRequest) (*pb.TxnResponse, error) {
isWrite := !isTxnReadonly(rt)
txn := mvcc.NewReadOnlyTxnWrite(a.s.KV().Read())
txnPath := compareToPath(txn, rt)
if isWrite {
if _, err := checkRequests(txn, rt, txnPath, a.checkPut); err != nil {
txn.End()
return nil, err
}
}
if _, err := checkRequests(txn, rt, txnPath, a.checkRange); err != nil {
txn.End()
return nil, err
}
txnResp, _ := newTxnResp(rt, txnPath)
// When executing mutable txn ops, etcd must hold the txn lock so
// readers do not see any intermediate results. Since writes are
// serialized on the raft loop, the revision in the read view will
// be the revision of the write txn.
if isWrite {
txn.End()
txn = a.s.KV().Write()
}
a.applyTxn(txn, rt, txnPath, txnResp)
rev := txn.Rev()
if len(txn.Changes()) != 0 {
rev++
}
txn.End()
txnResp.Header.Revision = rev
return txnResp, nil
}
// newTxnResp allocates a txn response for a txn request given a path.
func newTxnResp(rt *pb.TxnRequest, txnPath []bool) (txnResp *pb.TxnResponse, txnCount int) {
reqs := rt.Success
if !txnPath[0] {
reqs = rt.Failure
}
resps := make([]*pb.ResponseOp, len(reqs))
txnResp = &pb.TxnResponse{
Responses: resps,
Succeeded: txnPath[0],
Header: &pb.ResponseHeader{},
}
for i, req := range reqs {
switch tv := req.Request.(type) {
case *pb.RequestOp_RequestRange:
resps[i] = &pb.ResponseOp{Response: &pb.ResponseOp_ResponseRange{}}
case *pb.RequestOp_RequestPut:
resps[i] = &pb.ResponseOp{Response: &pb.ResponseOp_ResponsePut{}}
case *pb.RequestOp_RequestDeleteRange:
resps[i] = &pb.ResponseOp{Response: &pb.ResponseOp_ResponseDeleteRange{}}
case *pb.RequestOp_RequestTxn:
resp, txns := newTxnResp(tv.RequestTxn, txnPath[1:])
resps[i] = &pb.ResponseOp{Response: &pb.ResponseOp_ResponseTxn{ResponseTxn: resp}}
txnPath = txnPath[1+txns:]
txnCount += txns + 1
default:
}
}
return txnResp, txnCount
}
func compareToPath(rv mvcc.ReadView, rt *pb.TxnRequest) []bool {
txnPath := make([]bool, 1)
ops := rt.Success
if txnPath[0] = applyCompares(rv, rt.Compare); !txnPath[0] {
ops = rt.Failure
}
for _, op := range ops {
tv, ok := op.Request.(*pb.RequestOp_RequestTxn)
if !ok || tv.RequestTxn == nil {
continue
}
txnPath = append(txnPath, compareToPath(rv, tv.RequestTxn)...)
}
return txnPath
}
func applyCompares(rv mvcc.ReadView, cmps []*pb.Compare) bool {
for _, c := range cmps {
if !applyCompare(rv, c) {
return false
}
}
return true
}
// applyCompare applies the compare request.
// If the comparison succeeds, it returns true. Otherwise, returns false.
func applyCompare(rv mvcc.ReadView, c *pb.Compare) bool {
// TODO: possible optimizations
// * chunk reads for large ranges to conserve memory
// * rewrite rules for common patterns:
// ex. "[a, b) createrev > 0" => "limit 1 /\ kvs > 0"
// * caching
rr, err := rv.Range(c.Key, mkGteRange(c.RangeEnd), mvcc.RangeOptions{})
if err != nil {
return false
}
if len(rr.KVs) == 0 {
if c.Target == pb.Compare_VALUE {
// Always fail if comparing a value on a key/keys that doesn't exist;
// nil == empty string in grpc; no way to represent missing value
return false
}
return compareKV(c, mvccpb.KeyValue{})
}
for _, kv := range rr.KVs {
if !compareKV(c, kv) {
return false
}
}
return true
}
func compareKV(c *pb.Compare, ckv mvccpb.KeyValue) bool {
var result int
rev := int64(0)
switch c.Target {
case pb.Compare_VALUE:
v := []byte{}
if tv, _ := c.TargetUnion.(*pb.Compare_Value); tv != nil {
v = tv.Value
}
result = bytes.Compare(ckv.Value, v)
case pb.Compare_CREATE:
if tv, _ := c.TargetUnion.(*pb.Compare_CreateRevision); tv != nil {
rev = tv.CreateRevision
}
result = compareInt64(ckv.CreateRevision, rev)
case pb.Compare_MOD:
if tv, _ := c.TargetUnion.(*pb.Compare_ModRevision); tv != nil {
rev = tv.ModRevision
}
result = compareInt64(ckv.ModRevision, rev)
case pb.Compare_VERSION:
if tv, _ := c.TargetUnion.(*pb.Compare_Version); tv != nil {
rev = tv.Version
}
result = compareInt64(ckv.Version, rev)
case pb.Compare_LEASE:
if tv, _ := c.TargetUnion.(*pb.Compare_Lease); tv != nil {
rev = tv.Lease
}
result = compareInt64(ckv.Lease, rev)
}
switch c.Result {
case pb.Compare_EQUAL:
return result == 0
case pb.Compare_NOT_EQUAL:
return result != 0
case pb.Compare_GREATER:
return result > 0
case pb.Compare_LESS:
return result < 0
}
return true
}
func (a *applierV3backend) applyTxn(txn mvcc.TxnWrite, rt *pb.TxnRequest, txnPath []bool, tresp *pb.TxnResponse) (txns int) {
reqs := rt.Success
if !txnPath[0] {
reqs = rt.Failure
}
for i, req := range reqs {
respi := tresp.Responses[i].Response
switch tv := req.Request.(type) {
case *pb.RequestOp_RequestRange:
resp, err := a.Range(txn, tv.RequestRange)
if err != nil {
plog.Panicf("unexpected error during txn: %v", err)
}
respi.(*pb.ResponseOp_ResponseRange).ResponseRange = resp
case *pb.RequestOp_RequestPut:
resp, err := a.Put(txn, tv.RequestPut)
if err != nil {
plog.Panicf("unexpected error during txn: %v", err)
}
respi.(*pb.ResponseOp_ResponsePut).ResponsePut = resp
case *pb.RequestOp_RequestDeleteRange:
resp, err := a.DeleteRange(txn, tv.RequestDeleteRange)
if err != nil {
plog.Panicf("unexpected error during txn: %v", err)
}
respi.(*pb.ResponseOp_ResponseDeleteRange).ResponseDeleteRange = resp
case *pb.RequestOp_RequestTxn:
resp := respi.(*pb.ResponseOp_ResponseTxn).ResponseTxn
applyTxns := a.applyTxn(txn, tv.RequestTxn, txnPath[1:], resp)
txns += applyTxns + 1
txnPath = txnPath[applyTxns+1:]
default:
// empty union
}
}
return txns
}
func (a *applierV3backend) Compaction(compaction *pb.CompactionRequest) (*pb.CompactionResponse, <-chan struct{}, error) {
resp := &pb.CompactionResponse{}
resp.Header = &pb.ResponseHeader{}
ch, err := a.s.KV().Compact(compaction.Revision)
if err != nil {
return nil, ch, err
}
// get the current revision. which key to get is not important.
rr, _ := a.s.KV().Range([]byte("compaction"), nil, mvcc.RangeOptions{})
resp.Header.Revision = rr.Rev
return resp, ch, err
}
func (a *applierV3backend) LeaseGrant(lc *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error) {
l, err := a.s.lessor.Grant(lease.LeaseID(lc.ID), lc.TTL)
resp := &pb.LeaseGrantResponse{}
if err == nil {
resp.ID = int64(l.ID)
resp.TTL = l.TTL()
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) LeaseRevoke(lc *pb.LeaseRevokeRequest) (*pb.LeaseRevokeResponse, error) {
err := a.s.lessor.Revoke(lease.LeaseID(lc.ID))
return &pb.LeaseRevokeResponse{Header: newHeader(a.s)}, err
}
func (a *applierV3backend) Alarm(ar *pb.AlarmRequest) (*pb.AlarmResponse, error) {
resp := &pb.AlarmResponse{}
oldCount := len(a.s.alarmStore.Get(ar.Alarm))
switch ar.Action {
case pb.AlarmRequest_GET:
resp.Alarms = a.s.alarmStore.Get(ar.Alarm)
case pb.AlarmRequest_ACTIVATE:
m := a.s.alarmStore.Activate(types.ID(ar.MemberID), ar.Alarm)
if m == nil {
break
}
resp.Alarms = append(resp.Alarms, m)
activated := oldCount == 0 && len(a.s.alarmStore.Get(m.Alarm)) == 1
if !activated {
break
}
plog.Warningf("alarm %v raised by peer %s", m.Alarm, types.ID(m.MemberID))
switch m.Alarm {
case pb.AlarmType_CORRUPT:
a.s.applyV3 = newApplierV3Corrupt(a)
case pb.AlarmType_NOSPACE:
a.s.applyV3 = newApplierV3Capped(a)
default:
plog.Errorf("unimplemented alarm activation (%+v)", m)
}
case pb.AlarmRequest_DEACTIVATE:
m := a.s.alarmStore.Deactivate(types.ID(ar.MemberID), ar.Alarm)
if m == nil {
break
}
resp.Alarms = append(resp.Alarms, m)
deactivated := oldCount > 0 && len(a.s.alarmStore.Get(ar.Alarm)) == 0
if !deactivated {
break
}
switch m.Alarm {
case pb.AlarmType_NOSPACE, pb.AlarmType_CORRUPT:
// TODO: check kv hash before deactivating CORRUPT?
plog.Infof("alarm disarmed %+v", ar)
a.s.applyV3 = a.s.newApplierV3()
default:
plog.Errorf("unimplemented alarm deactivation (%+v)", m)
}
default:
return nil, nil
}
return resp, nil
}
type applierV3Capped struct {
applierV3
q backendQuota
}
// newApplierV3Capped creates an applyV3 that will reject Puts and transactions
// with Puts so that the number of keys in the store is capped.
func newApplierV3Capped(base applierV3) applierV3 { return &applierV3Capped{applierV3: base} }
func (a *applierV3Capped) Put(txn mvcc.TxnWrite, p *pb.PutRequest) (*pb.PutResponse, error) {
return nil, ErrNoSpace
}
func (a *applierV3Capped) Txn(r *pb.TxnRequest) (*pb.TxnResponse, error) {
if a.q.Cost(r) > 0 {
return nil, ErrNoSpace
}
return a.applierV3.Txn(r)
}
func (a *applierV3Capped) LeaseGrant(lc *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error) {
return nil, ErrNoSpace
}
func (a *applierV3backend) AuthEnable() (*pb.AuthEnableResponse, error) {
err := a.s.AuthStore().AuthEnable()
if err != nil {
return nil, err
}
return &pb.AuthEnableResponse{Header: newHeader(a.s)}, nil
}
func (a *applierV3backend) AuthDisable() (*pb.AuthDisableResponse, error) {
a.s.AuthStore().AuthDisable()
return &pb.AuthDisableResponse{Header: newHeader(a.s)}, nil
}
func (a *applierV3backend) Authenticate(r *pb.InternalAuthenticateRequest) (*pb.AuthenticateResponse, error) {
ctx := context.WithValue(context.WithValue(a.s.ctx, auth.AuthenticateParamIndex{}, a.s.consistIndex.ConsistentIndex()), auth.AuthenticateParamSimpleTokenPrefix{}, r.SimpleToken)
resp, err := a.s.AuthStore().Authenticate(ctx, r.Name, r.Password)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) UserAdd(r *pb.AuthUserAddRequest) (*pb.AuthUserAddResponse, error) {
resp, err := a.s.AuthStore().UserAdd(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) UserDelete(r *pb.AuthUserDeleteRequest) (*pb.AuthUserDeleteResponse, error) {
resp, err := a.s.AuthStore().UserDelete(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) UserChangePassword(r *pb.AuthUserChangePasswordRequest) (*pb.AuthUserChangePasswordResponse, error) {
resp, err := a.s.AuthStore().UserChangePassword(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) UserGrantRole(r *pb.AuthUserGrantRoleRequest) (*pb.AuthUserGrantRoleResponse, error) {
resp, err := a.s.AuthStore().UserGrantRole(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) UserGet(r *pb.AuthUserGetRequest) (*pb.AuthUserGetResponse, error) {
resp, err := a.s.AuthStore().UserGet(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) UserRevokeRole(r *pb.AuthUserRevokeRoleRequest) (*pb.AuthUserRevokeRoleResponse, error) {
resp, err := a.s.AuthStore().UserRevokeRole(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) RoleAdd(r *pb.AuthRoleAddRequest) (*pb.AuthRoleAddResponse, error) {
resp, err := a.s.AuthStore().RoleAdd(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) RoleGrantPermission(r *pb.AuthRoleGrantPermissionRequest) (*pb.AuthRoleGrantPermissionResponse, error) {
resp, err := a.s.AuthStore().RoleGrantPermission(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) RoleGet(r *pb.AuthRoleGetRequest) (*pb.AuthRoleGetResponse, error) {
resp, err := a.s.AuthStore().RoleGet(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) RoleRevokePermission(r *pb.AuthRoleRevokePermissionRequest) (*pb.AuthRoleRevokePermissionResponse, error) {
resp, err := a.s.AuthStore().RoleRevokePermission(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) RoleDelete(r *pb.AuthRoleDeleteRequest) (*pb.AuthRoleDeleteResponse, error) {
resp, err := a.s.AuthStore().RoleDelete(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) UserList(r *pb.AuthUserListRequest) (*pb.AuthUserListResponse, error) {
resp, err := a.s.AuthStore().UserList(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
func (a *applierV3backend) RoleList(r *pb.AuthRoleListRequest) (*pb.AuthRoleListResponse, error) {
resp, err := a.s.AuthStore().RoleList(r)
if resp != nil {
resp.Header = newHeader(a.s)
}
return resp, err
}
type quotaApplierV3 struct {
applierV3
q Quota
}
func newQuotaApplierV3(s *EtcdServer, app applierV3) applierV3 {
return &quotaApplierV3{app, NewBackendQuota(s)}
}
func (a *quotaApplierV3) Put(txn mvcc.TxnWrite, p *pb.PutRequest) (*pb.PutResponse, error) {
ok := a.q.Available(p)
resp, err := a.applierV3.Put(txn, p)
if err == nil && !ok {
err = ErrNoSpace
}
return resp, err
}
func (a *quotaApplierV3) Txn(rt *pb.TxnRequest) (*pb.TxnResponse, error) {
ok := a.q.Available(rt)
resp, err := a.applierV3.Txn(rt)
if err == nil && !ok {
err = ErrNoSpace
}
return resp, err
}
func (a *quotaApplierV3) LeaseGrant(lc *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error) {
ok := a.q.Available(lc)
resp, err := a.applierV3.LeaseGrant(lc)
if err == nil && !ok {
err = ErrNoSpace
}
return resp, err
}
type kvSort struct{ kvs []mvccpb.KeyValue }
func (s *kvSort) Swap(i, j int) {
t := s.kvs[i]
s.kvs[i] = s.kvs[j]
s.kvs[j] = t
}
func (s *kvSort) Len() int { return len(s.kvs) }
type kvSortByKey struct{ *kvSort }
func (s *kvSortByKey) Less(i, j int) bool {
return bytes.Compare(s.kvs[i].Key, s.kvs[j].Key) < 0
}
type kvSortByVersion struct{ *kvSort }
func (s *kvSortByVersion) Less(i, j int) bool {
return (s.kvs[i].Version - s.kvs[j].Version) < 0
}
type kvSortByCreate struct{ *kvSort }
func (s *kvSortByCreate) Less(i, j int) bool {
return (s.kvs[i].CreateRevision - s.kvs[j].CreateRevision) < 0
}
type kvSortByMod struct{ *kvSort }
func (s *kvSortByMod) Less(i, j int) bool {
return (s.kvs[i].ModRevision - s.kvs[j].ModRevision) < 0
}
type kvSortByValue struct{ *kvSort }
func (s *kvSortByValue) Less(i, j int) bool {
return bytes.Compare(s.kvs[i].Value, s.kvs[j].Value) < 0
}
func checkRequests(rv mvcc.ReadView, rt *pb.TxnRequest, txnPath []bool, f checkReqFunc) (int, error) {
txnCount := 0
reqs := rt.Success
if !txnPath[0] {
reqs = rt.Failure
}
for _, req := range reqs {
if tv, ok := req.Request.(*pb.RequestOp_RequestTxn); ok && tv.RequestTxn != nil {
txns, err := checkRequests(rv, tv.RequestTxn, txnPath[1:], f)
if err != nil {
return 0, err
}
txnCount += txns + 1
txnPath = txnPath[txns+1:]
continue
}
if err := f(rv, req); err != nil {
return 0, err
}
}
return txnCount, nil
}
func (a *applierV3backend) checkRequestPut(rv mvcc.ReadView, reqOp *pb.RequestOp) error {
tv, ok := reqOp.Request.(*pb.RequestOp_RequestPut)
if !ok || tv.RequestPut == nil {
return nil
}
req := tv.RequestPut
if req.IgnoreValue || req.IgnoreLease {
// expects previous key-value, error if not exist
rr, err := rv.Range(req.Key, nil, mvcc.RangeOptions{})
if err != nil {
return err
}
if rr == nil || len(rr.KVs) == 0 {
return ErrKeyNotFound
}
}
if lease.LeaseID(req.Lease) != lease.NoLease {
if l := a.s.lessor.Lookup(lease.LeaseID(req.Lease)); l == nil {
return lease.ErrLeaseNotFound
}
}
return nil
}
func (a *applierV3backend) checkRequestRange(rv mvcc.ReadView, reqOp *pb.RequestOp) error {
tv, ok := reqOp.Request.(*pb.RequestOp_RequestRange)
if !ok || tv.RequestRange == nil {
return nil
}
req := tv.RequestRange
switch {
case req.Revision == 0:
return nil
case req.Revision > rv.Rev():
return mvcc.ErrFutureRev
case req.Revision < rv.FirstRev():
return mvcc.ErrCompacted
}
return nil
}
func compareInt64(a, b int64) int {
switch {
case a < b:
return -1
case a > b:
return 1
default:
return 0
}
}
// mkGteRange determines if the range end is a >= range. This works around grpc
// sending empty byte strings as nil; >= is encoded in the range end as '\0'.
// If it is a GTE range, then []byte{} is returned to indicate the empty byte
// string (vs nil being no byte string).
func mkGteRange(rangeEnd []byte) []byte {
if len(rangeEnd) == 1 && rangeEnd[0] == 0 {
return []byte{}
}
return rangeEnd
}
func noSideEffect(r *pb.InternalRaftRequest) bool {
return r.Range != nil || r.AuthUserGet != nil || r.AuthRoleGet != nil
}
func removeNeedlessRangeReqs(txn *pb.TxnRequest) {
f := func(ops []*pb.RequestOp) []*pb.RequestOp {
j := 0
for i := 0; i < len(ops); i++ {
if _, ok := ops[i].Request.(*pb.RequestOp_RequestRange); ok {
continue
}
ops[j] = ops[i]
j++
}
return ops[:j]
}
txn.Success = f(txn.Success)
txn.Failure = f(txn.Failure)
}
func pruneKVs(rr *mvcc.RangeResult, isPrunable func(*mvccpb.KeyValue) bool) {
j := 0
for i := range rr.KVs {
rr.KVs[j] = rr.KVs[i]
if !isPrunable(&rr.KVs[i]) {
j++
}
}
rr.KVs = rr.KVs[:j]
}
func newHeader(s *EtcdServer) *pb.ResponseHeader {
return &pb.ResponseHeader{
ClusterId: uint64(s.Cluster().ID()),
MemberId: uint64(s.ID()),
Revision: s.KV().Rev(),
RaftTerm: s.Term(),
}
}