Merge branch 'feature/wal' into feature/table

src/cq/src/cqMain.c

@@ -334,7 +334,7 @@ static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row) {
   pHead->version = 0;
 
   // write into vnode write queue
-  pContext->cqWrite(pContext->ahandle, pHead, TAOS_QTYPE_CQ);
+  pContext->cqWrite(pContext->ahandle, pHead, TAOS_QTYPE_CQ, NULL);
   free(buffer);
 }
 

src/cq/test/cqtest.c

@@ -24,7 +24,7 @@
 int64_t  ver = 0;
 void    *pCq = NULL;
 
-int writeToQueue(void *pVnode, void *data, int type) {
+int writeToQueue(void *pVnode, void *data, int type, void *pMsg) { 
   return 0;
 }
 

src/dnode/src/dnodeVWrite.c

@@ -31,14 +31,6 @@ typedef struct {
   pthread_t thread;    // thread
 } SWriteWorker;
 
-typedef struct {
-  SRspRet rspRet;
-  SRpcMsg rpcMsg;
-  int32_t processedCount;
-  int32_t code;
-  int32_t contLen;
-  void *  pCont;
-} SWriteMsg;
 
 typedef struct {
   int32_t max;     // max number of workers
@@ -86,39 +78,38 @@ void dnodeCleanupVWrite() {
   dInfo("dnode vwrite is closed");
 }
 
-void dnodeDispatchToVWriteQueue(SRpcMsg *pMsg) {
-  char *pCont = pMsg->pCont;
+void dnodeDispatchToVWriteQueue(SRpcMsg *pRpcMsg) {
+  int32_t code;
+  char *pCont = pRpcMsg->pCont;
 
-  if (pMsg->msgType == TSDB_MSG_TYPE_SUBMIT) {
+  if (pRpcMsg->msgType == TSDB_MSG_TYPE_SUBMIT) {
     SMsgDesc *pDesc = (SMsgDesc *)pCont;
     pDesc->numOfVnodes = htonl(pDesc->numOfVnodes);
     pCont += sizeof(SMsgDesc);
   }
 
-  SMsgHead *pHead = (SMsgHead *) pCont;
-  pHead->vgId     = htonl(pHead->vgId);
-  pHead->contLen  = htonl(pHead->contLen);
+  SMsgHead *pMsg = (SMsgHead *)pCont;
+  pMsg->vgId = htonl(pMsg->vgId);
+  pMsg->contLen = htonl(pMsg->contLen);
 
-  taos_queue queue = vnodeAcquireWqueue(pHead->vgId);
-  if (queue) {
-    // put message into queue
-    SWriteMsg *pWrite = taosAllocateQitem(sizeof(SWriteMsg));
-    pWrite->rpcMsg    = *pMsg;
-    pWrite->pCont     = pCont;
-    pWrite->contLen   = pHead->contLen;
-
-    taosWriteQitem(queue, TAOS_QTYPE_RPC, pWrite);
+  void *pVnode = vnodeAcquire(pMsg->vgId);
+  if (pVnode == NULL) {
+    code = TSDB_CODE_VND_INVALID_VGROUP_ID;
   } else {
-    SRpcMsg rpcRsp = {
-      .handle  = pMsg->handle,
-      .pCont   = NULL,
-      .contLen = 0,
-      .code    = TSDB_CODE_VND_INVALID_VGROUP_ID,
-      .msgType = 0
-    };
+    SWalHead *pHead = (SWalHead *)(pCont - sizeof(SWalHead));
+    pHead->msgType = pRpcMsg->msgType;
+    pHead->version = 0;
+    pHead->len = pMsg->contLen;
+    code = vnodeWriteToQueue(pVnode, pHead, TAOS_QTYPE_RPC, pRpcMsg);
+  }
+
+  if (code != TSDB_CODE_SUCCESS) {
+    SRpcMsg rpcRsp = {.handle = pRpcMsg->handle, .code = code};
     rpcSendResponse(&rpcRsp);
-    rpcFreeCont(pMsg->pCont);
   }
+
+  vnodeRelease(pVnode);
+  rpcFreeCont(pRpcMsg->pCont);
 }
 
 void *dnodeAllocVWriteQueue(void *pVnode) {
@@ -179,7 +170,7 @@ void dnodeFreeVWriteQueue(void *wqueue) {
 
 void dnodeSendRpcVWriteRsp(void *pVnode, void *param, int32_t code) {
   if (param == NULL) return;
-  SWriteMsg *pWrite = param;
+  SVWriteMsg *pWrite = param;
 
   if (code < 0) pWrite->code = code;
   int32_t count = atomic_add_fetch_32(&pWrite->processedCount, 1);
@@ -187,26 +178,22 @@ void dnodeSendRpcVWriteRsp(void *pVnode, void *param, int32_t code) {
   if (count <= 1) return;
 
   SRpcMsg rpcRsp = {
-    .handle  = pWrite->rpcMsg.handle,
+    .handle  = pWrite->rpcHandle,
     .pCont   = pWrite->rspRet.rsp,
     .contLen = pWrite->rspRet.len,
     .code    = pWrite->code,
   };
 
   rpcSendResponse(&rpcRsp);
-  rpcFreeCont(pWrite->rpcMsg.pCont);
   taosFreeQitem(pWrite);
 
   vnodeRelease(pVnode);
 }
 
 static void *dnodeProcessWriteQueue(void *param) {
-  SWriteWorker *pWorker = (SWriteWorker *)param;
-  SWriteMsg *   pWrite;
-  SWalHead *    pHead;
-  SRspRet *     pRspRet;
+  SWriteWorker *pWorker = param;
+  SVWriteMsg *  pWrite;
   void *        pVnode;
-  void *        pItem;
   int32_t       numOfMsgs;
   int32_t       qtype;
 
@@ -220,36 +207,14 @@ static void *dnodeProcessWriteQueue(void *param) {
     }
 
     for (int32_t i = 0; i < numOfMsgs; ++i) {
-      pWrite = NULL;
-      pRspRet = NULL;
-      taosGetQitem(pWorker->qall, &qtype, &pItem);
-      if (qtype == TAOS_QTYPE_RPC) {
-        pWrite = pItem;
-        pRspRet = &pWrite->rspRet;
-        pHead = (SWalHead *)((char *)pWrite->pCont - sizeof(SWalHead));
-        pHead->msgType = pWrite->rpcMsg.msgType;
-        pHead->version = 0;
-        pHead->len = pWrite->contLen;
-        dDebug("%p, rpc msg:%s will be processed in vwrite queue", pWrite->rpcMsg.ahandle,
-               taosMsg[pWrite->rpcMsg.msgType]);
-      } else if (qtype == TAOS_QTYPE_CQ) {
-        pHead = (SWalHead *)((char *)pItem + sizeof(SSyncHead));
-        dTrace("%p, CQ wal msg:%s will be processed in vwrite queue, version:%" PRIu64, pHead, taosMsg[pHead->msgType],
-               pHead->version);
-      } else {
-        pHead = pItem;
-        dTrace("%p, wal msg:%s will be processed in vwrite queue, version:%" PRIu64, pHead, taosMsg[pHead->msgType],
-               pHead->version);
-      }
+      taosGetQitem(pWorker->qall, &qtype, (void **)&pWrite);
+      dTrace("%p, msg:%p:%s will be processed in vwrite queue, qtype:%d version:%" PRIu64, pWrite->rpcAhandle, pWrite,
+             taosMsg[pWrite->pHead->msgType], qtype, pWrite->pHead->version);
 
-      int32_t code = vnodeProcessWrite(pVnode, qtype, pHead, pRspRet);
-      dTrace("%p, msg:%s is processed in vwrite queue, version:%" PRIu64 ", result:%s", pHead, taosMsg[pHead->msgType],
-             pHead->version, tstrerror(code));
+      pWrite->code = vnodeProcessWrite(pVnode, qtype, pWrite);
+      if (pWrite->code <= 0) pWrite->processedCount = 1;
 
-      if (pWrite) {
-        pWrite->rpcMsg.code = code;
-        if (code <= 0) pWrite->processedCount = 1;
-      }
+      dTrace("msg:%p is processed in vwrite queue, result:%s", pWrite, tstrerror(pWrite->code));
     }
 
     walFsync(vnodeGetWal(pVnode));
@@ -257,17 +222,15 @@ static void *dnodeProcessWriteQueue(void *param) {
     // browse all items, and process them one by one
     taosResetQitems(pWorker->qall);
     for (int32_t i = 0; i < numOfMsgs; ++i) {
-      taosGetQitem(pWorker->qall, &qtype, &pItem);
+      taosGetQitem(pWorker->qall, &qtype, (void **)&pWrite);
       if (qtype == TAOS_QTYPE_RPC) {
-        pWrite = pItem;
-        dnodeSendRpcVWriteRsp(pVnode, pItem, pWrite->rpcMsg.code);
+        dnodeSendRpcVWriteRsp(pVnode, pWrite, pWrite->code);
       } else if (qtype == TAOS_QTYPE_FWD) {
-        pHead = pItem;
-        vnodeConfirmForward(pVnode, pHead->version, 0);
-        taosFreeQitem(pItem);
+        vnodeConfirmForward(pVnode, pWrite->pHead->version, 0);
+        taosFreeQitem(pWrite);
         vnodeRelease(pVnode);
       } else {
-        taosFreeQitem(pItem);
+        taosFreeQitem(pWrite);
         vnodeRelease(pVnode);
       }
     }

src/inc/tcq.h

@@ -21,7 +21,7 @@ extern "C" {
 
 #include "tdataformat.h"
 
-typedef int (*FCqWrite)(void *ahandle, void *pHead, int type);
+typedef int32_t (*FCqWrite)(void *ahandle, void *pHead, int32_t qtype, void *pMsg);
 
 typedef struct {
   int      vgId;

src/inc/tsync.h

@@ -71,7 +71,7 @@ typedef uint32_t (*FGetFileInfo)(void *ahandle, char *name, uint32_t *index, uin
 typedef int32_t  (*FGetWalInfo)(void *ahandle, char *fileName, int64_t *fileId); 
  
 // when a forward pkt is received, call this to handle data
-typedef int      (*FWriteToCache)(void *ahandle, void *pHead, int type);
+typedef int32_t  (*FWriteToCache)(void *ahandle, void *pHead, int32_t qtype, void *pMsg);
 
 // when forward is confirmed by peer, master call this API to notify app
 typedef void     (*FConfirmForward)(void *ahandle, void *mhandle, int32_t code);

src/inc/twal.h

@@ -43,8 +43,8 @@ typedef struct {
   int8_t  keep;         // keep the wal file when closed
 } SWalCfg;
 
-typedef void* twalh;  // WAL HANDLE
-typedef int (*FWalWrite)(void *ahandle, void *pHead, int type);
+typedef void *  twalh;  // WAL HANDLE
+typedef int32_t FWalWrite(void *ahandle, void *pHead, int32_t qtype, void *pMsg);
 
 int32_t walInit();
 void    walCleanUp();

src/inc/vnode.h

@@ -20,6 +20,8 @@
 extern "C" {
 #endif
 
+#include "twal.h"
+
 typedef enum _VN_STATUS {
   TAOS_VN_STATUS_INIT,
   TAOS_VN_STATUS_READY,
@@ -29,9 +31,9 @@ typedef enum _VN_STATUS {
 } EVnStatus;
 
 typedef struct {
-  int   len;
-  void *rsp;
-  void *qhandle; //used by query and retrieve msg
+  int32_t len;
+  void *  rsp;
+  void *  qhandle;  // used by query and retrieve msg
 } SRspRet;
 
 typedef struct {
@@ -41,6 +43,16 @@ typedef struct {
   SRpcMsg  rpcMsg;
 } SReadMsg;
 
+typedef struct {
+  int32_t   code;
+  int32_t   processedCount;
+  void *    rpcHandle;
+  void *    rpcAhandle;
+  SRspRet   rspRet;
+  char      reserveForSync[16];
+  SWalHead  pHead[];
+} SVWriteMsg;
+
 extern char *vnodeStatus[];
 
 int32_t vnodeCreate(SCreateVnodeMsg *pVnodeCfg);
@@ -51,11 +63,11 @@ int32_t vnodeClose(int32_t vgId);
 
 void*   vnodeAcquire(int32_t vgId);        // add refcount
 void*   vnodeAcquireRqueue(int32_t vgId);  // add refCount, get read queue 
-void*   vnodeAcquireWqueue(int32_t vgId);  // add recCount, get write queue
 void    vnodeRelease(void *pVnode);        // dec refCount
 void*   vnodeGetWal(void *pVnode);
 
-int32_t vnodeProcessWrite(void *pVnode, int qtype, void *pHead, void *item);
+int32_t vnodeWriteToQueue(void *vparam, void *wparam, int32_t qtype, void *pMsg);
+int32_t vnodeProcessWrite(void *param, int32_t qtype, SVWriteMsg *pWrite);
 int32_t vnodeCheckWrite(void *pVnode);
 int32_t vnodeGetVnodeList(int32_t vnodeList[], int32_t *numOfVnodes);
 void    vnodeBuildStatusMsg(void *param);

src/mnode/src/mnodeSdb.c

@@ -98,8 +98,8 @@ static taos_qall  tsSdbWriteQall;
 static taos_queue tsSdbWriteQueue;
 static SSdbWriteWorkerPool tsSdbPool;
 
-static int     sdbWrite(void *param, void *data, int type);
-static int     sdbWriteToQueue(void *param, void *data, int type);
+static int32_t sdbWrite(void *param, void *data, int32_t type, void *pMsg);
+static int32_t sdbWriteToQueue(void *param, void *data, int32_t type, void *pMsg);
 static void *  sdbWorkerFp(void *param);
 static int32_t sdbInitWriteWorker();
 static void    sdbCleanupWriteWorker();
@@ -575,7 +575,7 @@ static int32_t sdbUpdateHash(SSdbTable *pTable, SSdbOper *pOper) {
   return TSDB_CODE_SUCCESS;
 }
 
-static int sdbWrite(void *param, void *data, int type) {
+static int sdbWrite(void *param, void *data, int32_t type, void *pMsg) {
   SSdbOper *pOper = param;
   SWalHead *pHead = data;
   int32_t tableId = pHead->msgType / 10;
@@ -1040,13 +1040,13 @@ void sdbFreeWritequeue() {
   tsSdbWriteQueue = NULL;
 }
 
-int sdbWriteToQueue(void *param, void *data, int type) {
+int32_t sdbWriteToQueue(void *param, void *data, int32_t qtype, void *pMsg) {
   SWalHead *pHead = data;
-  int size = sizeof(SWalHead) + pHead->len;
+  int32_t   size = sizeof(SWalHead) + pHead->len;
   SWalHead *pWal = (SWalHead *)taosAllocateQitem(size);
   memcpy(pWal, pHead, size);
 
-  taosWriteQitem(tsSdbWriteQueue, type, pWal);
+  taosWriteQitem(tsSdbWriteQueue, qtype, pWal);
   return 0;
 }
 
@@ -1081,7 +1081,7 @@ static void *sdbWorkerFp(void *param) {
         pOper = NULL;
       }
 
-      int32_t code = sdbWrite(pOper, pHead, type);
+      int32_t code = sdbWrite(pOper, pHead, type, NULL);
       if (code > 0) code = 0;
       if (pOper) {
         pOper->retCode = code;

src/sync/src/syncMain.c

@@ -863,7 +863,7 @@ static void syncProcessForwardFromPeer(char *cont, SSyncPeer *pPeer) {
 
   if (nodeRole == TAOS_SYNC_ROLE_SLAVE) {
     // nodeVersion = pHead->version;
-    (*pNode->writeToCache)(pNode->ahandle, pHead, TAOS_QTYPE_FWD);
+    (*pNode->writeToCache)(pNode->ahandle, pHead, TAOS_QTYPE_FWD, NULL);
   } else {
     if (nodeSStatus != TAOS_SYNC_STATUS_INIT) {
       syncSaveIntoBuffer(pPeer, pHead);

src/sync/src/syncRestore.c

@@ -154,7 +154,7 @@ static int syncRestoreWal(SSyncPeer *pPeer) {
     if (ret < 0) break;
 
     sDebug("%s, restore a record, ver:%" PRIu64, pPeer->id, pHead->version);
-    (*pNode->writeToCache)(pNode->ahandle, pHead, TAOS_QTYPE_WAL);
+    (*pNode->writeToCache)(pNode->ahandle, pHead, TAOS_QTYPE_WAL, NULL);
   }
 
   if (code < 0) {
@@ -169,7 +169,7 @@ static char *syncProcessOneBufferedFwd(SSyncPeer *pPeer, char *offset) {
   SSyncNode *pNode = pPeer->pSyncNode;
   SWalHead * pHead = (SWalHead *)offset;
 
-  (*pNode->writeToCache)(pNode->ahandle, pHead, TAOS_QTYPE_FWD);
+  (*pNode->writeToCache)(pNode->ahandle, pHead, TAOS_QTYPE_FWD, NULL);
   offset += pHead->len + sizeof(SWalHead);
 
   return offset;

src/vnode/inc/vnodeInt.h

@@ -61,8 +61,6 @@ typedef struct {
   char         db[TSDB_DB_NAME_LEN];
 } SVnodeObj;
 
-int  vnodeWriteToQueue(void *param, void *pHead, int type);
-int  vnodeWriteCqMsgToQueue(void *param, void *pHead, int type);
 void vnodeInitWriteFp(void);
 void vnodeInitReadFp(void);
 

src/vnode/src/vnodeMain.c

@@ -266,7 +266,7 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
   strcpy(cqCfg.pass, tsInternalPass);
   strcpy(cqCfg.db, pVnode->db);
   cqCfg.vgId = vnode;
-  cqCfg.cqWrite = vnodeWriteCqMsgToQueue;
+  cqCfg.cqWrite = vnodeWriteToQueue;
   pVnode->cq = cqOpen(pVnode, &cqCfg);
   if (pVnode->cq == NULL) {
     vnodeCleanUp(pVnode);
@@ -365,6 +365,7 @@ int32_t vnodeClose(int32_t vgId) {
 }
 
 void vnodeRelease(void *pVnodeRaw) {
+  if (pVnodeRaw == NULL) return;
   SVnodeObj *pVnode = pVnodeRaw;
   int32_t    vgId = pVnode->vgId;
 
@@ -482,21 +483,6 @@ void *vnodeAcquireRqueue(int32_t vgId) {
   return pVnode->rqueue;
 }
 
-void *vnodeAcquireWqueue(int32_t vgId) {
-  SVnodeObj *pVnode = vnodeAcquire(vgId);
-  if (pVnode == NULL) return NULL;
-
-  int32_t code = vnodeCheckWrite(pVnode);
-  if (code != TSDB_CODE_SUCCESS) {
-    terrno = code;
-    vInfo("vgId:%d, can not provide write service, status is %s", vgId, vnodeStatus[pVnode->status]);
-    vnodeRelease(pVnode);
-    return NULL;
-  }
-
-  return pVnode->wqueue;
-}
-
 void *vnodeGetWal(void *pVnode) {
   return ((SVnodeObj *)pVnode)->wal;
 }

src/vnode/src/vnodeWrite.c

@@ -46,10 +46,10 @@ void vnodeInitWriteFp(void) {
   vnodeProcessWriteMsgFp[TSDB_MSG_TYPE_UPDATE_TAG_VAL]  = vnodeProcessUpdateTagValMsg;
 }
 
-int32_t vnodeProcessWrite(void *param1, int qtype, void *param2, void *item) {
+int32_t vnodeProcessWrite(void *param, int32_t qtype, SVWriteMsg *pWrite) {
   int32_t    code = 0;
-  SVnodeObj *pVnode = (SVnodeObj *)param1;
-  SWalHead * pHead = param2;
+  SVnodeObj *pVnode = param;
+  SWalHead * pHead = pWrite->pHead;
 
   if (vnodeProcessWriteMsgFp[pHead->msgType] == NULL) {
     vDebug("vgId:%d, msgType:%s not processed, no handle", pVnode->vgId, taosMsg[pHead->msgType]);
@@ -80,7 +80,7 @@ int32_t vnodeProcessWrite(void *param1, int qtype, void *param2, void *item) {
 
   // forward to peers, even it is WAL/FWD, it shall be called to update version in sync
   int32_t syncCode = 0;
-  syncCode = syncForwardToPeer(pVnode->sync, pHead, item, qtype);
+  syncCode = syncForwardToPeer(pVnode->sync, pHead, &pWrite->rspRet, qtype);
   if (syncCode < 0) return syncCode;
 
   // write into WAL
@@ -90,7 +90,7 @@ int32_t vnodeProcessWrite(void *param1, int qtype, void *param2, void *item) {
   pVnode->version = pHead->version;
 
   // write data locally
-  code = (*vnodeProcessWriteMsgFp[pHead->msgType])(pVnode, pHead->cont, item);
+  code = (*vnodeProcessWriteMsgFp[pHead->msgType])(pVnode, pHead->cont, &pWrite->rspRet);
   if (code < 0) return code;
 
   return syncCode;
@@ -204,35 +204,32 @@ static int32_t vnodeProcessUpdateTagValMsg(SVnodeObj *pVnode, void *pCont, SRspR
   return TSDB_CODE_SUCCESS;
 }
 
-int vnodeWriteCqMsgToQueue(void *param, void *data, int type) {
-  SVnodeObj *pVnode = param;
-  SWalHead * pHead = data;
-
-  int size = sizeof(SWalHead) + pHead->len;
-  SSyncHead *pSync = (SSyncHead*) taosAllocateQitem(size + sizeof(SSyncHead));
-  SWalHead *pWal = (SWalHead *)(pSync + 1);
-  memcpy(pWal, pHead, size);
+int32_t vnodeWriteToQueue(void *vparam, void *wparam, int32_t qtype, void *pMsg) {
+  SVnodeObj *pVnode = vparam;
+  SWalHead * pHead = wparam;
 
-  atomic_add_fetch_32(&pVnode->refCount, 1);
-  vTrace("CQ: vgId:%d, get vnode wqueue, refCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
-
-  taosWriteQitem(pVnode->wqueue, type, pSync);
+  if (qtype == TAOS_QTYPE_RPC) {
+    int32_t code = vnodeCheckWrite(pVnode);
+    if (code != TSDB_CODE_SUCCESS) return code;
+  }
 
-  return 0;
-}
+  int32_t size = sizeof(SVWriteMsg) + sizeof(SWalHead) + pHead->len;
+  SVWriteMsg *pWrite = taosAllocateQitem(size);
+  if (pWrite == NULL) {
+    return TSDB_CODE_VND_OUT_OF_MEMORY;
+  }
 
-int vnodeWriteToQueue(void *param, void *data, int type) {
-  SVnodeObj *pVnode = param;
-  SWalHead * pHead = data;
+  if (pMsg != NULL) {
+    SRpcMsg *pRpcMsg = pMsg;
+    pWrite->rpcHandle = pRpcMsg->handle;
+    pWrite->rpcAhandle = pRpcMsg->ahandle;
+  }
 
-  int size = sizeof(SWalHead) + pHead->len;
-  SWalHead *pWal = (SWalHead *)taosAllocateQitem(size);
-  memcpy(pWal, pHead, size);
+  memcpy(pWrite->pHead, pHead, sizeof(SWalHead) + pHead->len);
 
   atomic_add_fetch_32(&pVnode->refCount, 1);
   vTrace("vgId:%d, get vnode wqueue, refCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
 
-  taosWriteQitem(pVnode->wqueue, type, pWal);
-
-  return 0;
+  taosWriteQitem(pVnode->wqueue, qtype, pWrite);
+  return TSDB_CODE_SUCCESS;
 }

src/wal/src/walWrite.c

@@ -122,7 +122,7 @@ void walFsync(void *handle) {
   }
 }
 
-int32_t walRestore(void *handle, void *pVnode, int32_t (*writeFp)(void *, void *, int32_t)) {
+int32_t walRestore(void *handle, void *pVnode, FWalWrite writeFp) {
   if (handle == NULL) return -1;
 
   SWal *  pWal = handle;
@@ -307,7 +307,7 @@ static int32_t walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp, ch
 
     if (pWal->keep) pWal->version = pHead->version;
 
-    (*writeFp)(pVnode, pHead, TAOS_QTYPE_WAL);
+    (*writeFp)(pVnode, pHead, TAOS_QTYPE_WAL, NULL);
   }
 
   tclose(fd);

src/wal/test/waltest.c

@@ -23,7 +23,7 @@
 int64_t  ver = 0;
 void    *pWal = NULL;
 
-int writeToQueue(void *pVnode, void *data, int type) {
+int writeToQueue(void *pVnode, void *data, int type, void *pMsg) {
   // do nothing
   SWalHead *pHead = data;