sync index

source/libs/sync/inc/syncInt.h

@@ -232,6 +232,7 @@ void syncNodeCandidate2Follower(SSyncNode* pSyncNode);
 // raft vote --------------
 void syncNodeVoteForTerm(SSyncNode* pSyncNode, SyncTerm term, SRaftId* pRaftId);
 void syncNodeVoteForSelf(SSyncNode* pSyncNode);
+void syncNodeMaybeAdvanceCommitIndex(SSyncNode* pSyncNode);
 
 // for debug --------------
 void syncNodePrint(SSyncNode* pObj);

source/libs/sync/inc/syncMessage.h

@@ -196,7 +196,7 @@ typedef struct SyncRequestVote {
   SRaftId  srcId;
   SRaftId  destId;
   // private data
-  SyncTerm  currentTerm;
+  SyncTerm  term;
   SyncIndex lastLogIndex;
   SyncTerm  lastLogTerm;
 } SyncRequestVote;
@@ -287,6 +287,7 @@ typedef struct SyncAppendEntriesReply {
   SRaftId  srcId;
   SRaftId  destId;
   // private data
+  SyncTerm  term;
   bool      success;
   SyncIndex matchIndex;
 } SyncAppendEntriesReply;

source/libs/sync/src/syncAppendEntries.c

@@ -80,4 +80,9 @@
 //                       /\ UNCHANGED <<serverVars, commitIndex, messages>>
 //       /\ UNCHANGED <<candidateVars, leaderVars>>
 //
-int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {}
+int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
+  int32_t ret = 0;
+  syncAppendEntriesLog2("==syncNodeOnAppendEntriesCb==", pMsg);
+
+  return ret;
+}

source/libs/sync/src/syncAppendEntriesReply.c

@@ -14,6 +14,12 @@
  */
 
 #include "syncAppendEntriesReply.h"
+#include "syncIndexMgr.h"
+#include "syncInt.h"
+#include "syncRaftLog.h"
+#include "syncRaftStore.h"
+#include "syncUtil.h"
+#include "syncVoteMgr.h"
 
 // TLA+ Spec
 // HandleAppendEntriesResponse(i, j, m) ==
@@ -28,4 +34,41 @@
 //    /\ Discard(m)
 //    /\ UNCHANGED <<serverVars, candidateVars, logVars, elections>>
 //
-int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg) {}
+int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg) {
+  int32_t ret = 0;
+  syncAppendEntriesReplyLog2("==syncNodeOnAppendEntriesReplyCb==", pMsg);
+
+  if (pMsg->term < ths->pRaftStore->currentTerm) {
+    sTrace("DropStaleResponse, receive term:%lu, current term:%lu", pMsg->term, ths->pRaftStore->currentTerm);
+    return ret;
+  }
+
+  // no need this code, because if I receive reply.term, then I must have sent for that term.
+  //  if (pMsg->term > ths->pRaftStore->currentTerm) {
+  //    syncNodeUpdateTerm(ths, pMsg->term);
+  //  }
+
+  assert(pMsg->term == ths->pRaftStore->currentTerm);
+
+  if (pMsg->success) {
+    // nextIndex = reply.matchIndex + 1
+    syncIndexMgrSetIndex(ths->pNextIndex, &(pMsg->srcId), pMsg->matchIndex + 1);
+
+    // matchIndex = reply.matchIndex
+    syncIndexMgrSetIndex(ths->pMatchIndex, &(pMsg->srcId), pMsg->matchIndex);
+
+    // maybe commit
+    syncNodeMaybeAdvanceCommitIndex(ths);
+
+  } else {
+    SyncIndex nextIndex = syncIndexMgrGetIndex(ths->pNextIndex, &(pMsg->srcId));
+    if (nextIndex > SYNC_INDEX_BEGIN) {
+      --nextIndex;
+    } else {
+      nextIndex = SYNC_INDEX_BEGIN;
+    }
+    syncIndexMgrSetIndex(ths->pNextIndex, &(pMsg->srcId), nextIndex);
+  }
+
+  return ret;
+}

source/libs/sync/src/syncElection.c

@@ -38,7 +38,7 @@ int32_t syncNodeRequestVotePeers(SSyncNode* pSyncNode) {
     SyncRequestVote* pMsg = syncRequestVoteBuild();
     pMsg->srcId = pSyncNode->myRaftId;
     pMsg->destId = pSyncNode->peersId[i];
-    pMsg->currentTerm = pSyncNode->pRaftStore->currentTerm;
+    pMsg->term = pSyncNode->pRaftStore->currentTerm;
     pMsg->lastLogIndex = pSyncNode->pLogStore->getLastIndex(pSyncNode->pLogStore);
     pMsg->lastLogTerm = pSyncNode->pLogStore->getLastTerm(pSyncNode->pLogStore);
 

source/libs/sync/src/syncMain.c

@@ -587,6 +587,8 @@ void syncNodeVoteForSelf(SSyncNode* pSyncNode) {
   syncRequestVoteReplyDestroy(pMsg);
 }
 
+void syncNodeMaybeAdvanceCommitIndex(SSyncNode* pSyncNode) {}
+
 // for debug --------------
 void syncNodePrint(SSyncNode* pObj) {
   char* serialized = syncNode2Str(pObj);

source/libs/sync/src/syncMessage.c

@@ -820,8 +820,8 @@ cJSON* syncRequestVote2Json(const SyncRequestVote* pMsg) {
   cJSON_AddNumberToObject(pDestId, "vgId", pMsg->destId.vgId);
   cJSON_AddItemToObject(pRoot, "destId", pDestId);
 
-  snprintf(u64buf, sizeof(u64buf), "%lu", pMsg->currentTerm);
-  cJSON_AddStringToObject(pRoot, "currentTerm", u64buf);
+  snprintf(u64buf, sizeof(u64buf), "%lu", pMsg->term);
+  cJSON_AddStringToObject(pRoot, "term", u64buf);
   snprintf(u64buf, sizeof(u64buf), "%lu", pMsg->lastLogIndex);
   cJSON_AddStringToObject(pRoot, "lastLogIndex", u64buf);
   snprintf(u64buf, sizeof(u64buf), "%lu", pMsg->lastLogTerm);
@@ -1264,9 +1264,11 @@ cJSON* syncAppendEntriesReply2Json(const SyncAppendEntriesReply* pMsg) {
   cJSON_AddNumberToObject(pDestId, "vgId", pMsg->destId.vgId);
   cJSON_AddItemToObject(pRoot, "destId", pDestId);
 
+  snprintf(u64buf, sizeof(u64buf), "%lu", pMsg->term);
+  cJSON_AddStringToObject(pRoot, "term", u64buf);
   cJSON_AddNumberToObject(pRoot, "success", pMsg->success);
   snprintf(u64buf, sizeof(u64buf), "%lu", pMsg->matchIndex);
-  cJSON_AddStringToObject(pRoot, "match_index", u64buf);
+  cJSON_AddStringToObject(pRoot, "matchIndex", u64buf);
 
   cJSON* pJson = cJSON_CreateObject();
   cJSON_AddItemToObject(pJson, "SyncAppendEntriesReply", pRoot);

source/libs/sync/src/syncReplication.c

@@ -17,6 +17,8 @@
 #include "syncIndexMgr.h"
 #include "syncMessage.h"
 #include "syncRaftEntry.h"
+#include "syncRaftLog.h"
+#include "syncUtil.h"
 
 // TLA+ Spec
 // AppendEntries(i, j) ==
@@ -50,16 +52,31 @@ int32_t syncNodeAppendEntriesPeers(SSyncNode* pSyncNode) {
   for (int i = 0; i < pSyncNode->peersNum; ++i) {
     SRaftId*  pDestId = &(pSyncNode->peersId[i]);
     SyncIndex nextIndex = syncIndexMgrGetIndex(pSyncNode->pNextIndex, pDestId);
+
     SyncIndex preLogIndex = nextIndex - 1;
+
     SyncTerm preLogTerm = 0;
-    if (preLogIndex >= 0) {
+    if (preLogIndex >= SYNC_INDEX_BEGIN) {
       SSyncRaftEntry* pPreEntry = pSyncNode->pLogStore->getEntry(pSyncNode->pLogStore, preLogIndex);
       preLogTerm = pPreEntry->term;
-    } else {
-      preLogTerm = 0;
     }
-    // SyncTerm lastIndex =
-    //     pSyncNode->pLogStore->getLastIndex < nextIndex ? pSyncNode->pLogStore->getLastIndex : nextIndex;
+
+    SyncIndex lastIndex = syncUtilMinIndex(pSyncNode->pLogStore->getLastIndex(pSyncNode->pLogStore), nextIndex);
+    assert(nextIndex == lastIndex);
+
+    SSyncRaftEntry* pEntry = logStoreGetEntry(pSyncNode->pLogStore, nextIndex);
+    assert(pEntry != NULL);
+
+    SyncAppendEntries* pMsg = syncAppendEntriesBuild(pEntry->bytes);
+    pMsg->srcId = pSyncNode->myRaftId;
+    pMsg->destId = *pDestId;
+    pMsg->prevLogIndex = preLogIndex;
+    pMsg->prevLogTerm = preLogTerm;
+    pMsg->commitIndex = pSyncNode->commitIndex;
+    pMsg->dataLen = pEntry->bytes;
+    // add pEntry into msg
+
+    syncNodeAppendEntries(pSyncNode, pDestId, pMsg);
   }
 
   return ret;

source/libs/sync/src/syncRequestVote.c

@@ -14,6 +14,10 @@
  */
 
 #include "syncRequestVote.h"
+#include "syncInt.h"
+#include "syncRaftStore.h"
+#include "syncUtil.h"
+#include "syncVoteMgr.h"
 
 // TLA+ Spec
 // HandleRequestVoteRequest(i, j, m) ==
@@ -37,4 +41,34 @@
 //                 m)
 //       /\ UNCHANGED <<state, currentTerm, candidateVars, leaderVars, logVars>>
 //
-int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg) {}
+int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg) {
+  int32_t ret = 0;
+  syncRequestVoteLog2("==syncNodeOnRequestVoteCb==", pMsg);
+
+  if (pMsg->term > ths->pRaftStore->currentTerm) {
+    syncNodeUpdateTerm(ths, pMsg->term);
+  }
+  assert(pMsg->term <= ths->pRaftStore->currentTerm);
+
+  bool logOK = (pMsg->lastLogTerm > ths->pLogStore->getLastTerm(ths->pLogStore)) ||
+               ((pMsg->lastLogTerm == ths->pLogStore->getLastTerm(ths->pLogStore)) &&
+                (pMsg->lastLogIndex >= ths->pLogStore->getLastIndex(ths->pLogStore)));
+  bool grant = (pMsg->term == ths->pRaftStore->currentTerm) && logOK &&
+               ((!raftStoreHasVoted(ths->pRaftStore)) || (syncUtilSameId(&(ths->pRaftStore->voteFor), &(pMsg->srcId))));
+  if (grant) {
+    raftStoreVote(ths->pRaftStore, &(pMsg->srcId));
+  }
+
+  SyncRequestVoteReply* pReply = syncRequestVoteReplyBuild();
+  pReply->srcId = ths->myRaftId;
+  pReply->destId = pMsg->srcId;
+  pReply->term = ths->pRaftStore->currentTerm;
+  pReply->voteGranted = grant;
+
+  SRpcMsg rpcMsg;
+  syncRequestVoteReply2RpcMsg(pReply, &rpcMsg);
+  syncNodeSendMsgById(&pReply->destId, ths, &rpcMsg);
+  syncRequestVoteReplyDestroy(pReply);
+
+  return ret;
+}

source/libs/sync/src/syncRequestVoteReply.c

@@ -14,6 +14,10 @@
  */
 
 #include "syncRequestVoteReply.h"
+#include "syncInt.h"
+#include "syncRaftStore.h"
+#include "syncUtil.h"
+#include "syncVoteMgr.h"
 
 // TLA+ Spec
 // HandleRequestVoteResponse(i, j, m) ==
@@ -32,4 +36,33 @@
 //    /\ Discard(m)
 //    /\ UNCHANGED <<serverVars, votedFor, leaderVars, logVars>>
 //
-int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg) {}
+int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg) {
+  int32_t ret = 0;
+  syncRequestVoteReplyLog2("==syncNodeOnRequestVoteReplyCb==", pMsg);
+
+  if (pMsg->term < ths->pRaftStore->currentTerm) {
+    sTrace("DropStaleResponse, receive term:%lu, current term:%lu", pMsg->term, ths->pRaftStore->currentTerm);
+    return ret;
+  }
+
+  // no need this code, because if I receive reply.term, then I must have sent for that term.
+  //  if (pMsg->term > ths->pRaftStore->currentTerm) {
+  //    syncNodeUpdateTerm(ths, pMsg->term);
+  //  }
+
+  assert(pMsg->term == ths->pRaftStore->currentTerm);
+
+  if (ths->state == TAOS_SYNC_STATE_CANDIDATE) {
+    votesRespondAdd(ths->pVotesRespond, pMsg);
+    if (pMsg->voteGranted) {
+      voteGrantedVote(ths->pVotesGranted, pMsg);
+      if (voteGrantedMajority(ths->pVotesGranted)) {
+        if (ths->pVotesGranted->toLeader) {
+          syncNodeCandidate2Leader(ths);
+          ths->pVotesGranted->toLeader = true;
+        }
+      }
+    }
+  }
+  return ret;
+}

source/libs/sync/test/syncRequestVoteTest.cpp

@@ -20,7 +20,7 @@ SyncRequestVote *createMsg() {
   pMsg->srcId.vgId = 100;
   pMsg->destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
   pMsg->destId.vgId = 100;
-  pMsg->currentTerm = 11;
+  pMsg->term = 11;
   pMsg->lastLogIndex = 22;
   pMsg->lastLogTerm = 33;
   return pMsg;

source/libs/sync/test/syncRpcMsgTest.cpp

@@ -57,7 +57,7 @@ SyncRequestVote *createSyncRequestVote() {
   pMsg->srcId.vgId = 100;
   pMsg->destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
   pMsg->destId.vgId = 100;
-  pMsg->currentTerm = 11;
+  pMsg->term = 11;
   pMsg->lastLogIndex = 22;
   pMsg->lastLogTerm = 33;
   return pMsg;