homework-jianmu/source/dnode/mgmt/node_mgmt/src/dmMgmt.c

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#define _DEFAULT_SOURCE
#include "dmMgmt.h"
#include "dmNodes.h"
#include "index.h"
#include "qworker.h"
#include "tstream.h"
#ifdef TD_TSZ
#include "tglobal.h"
#include "tcompression.h"
#endif

int32_t dmInitDnode(SDnode *pDnode) {
  dDebug("start to create dnode");
  int32_t code = -1;
  char    path[PATH_MAX + 100] = {0};

  if (dmInitVars(pDnode) != 0) {
    goto _OVER;
  }

#ifdef TD_TSZ
  // compress module init
  tsCompressInit(tsLossyColumns, tsFPrecision, tsDPrecision, tsMaxRange, tsCurRange, (int)tsIfAdtFse, tsCompressor);
#endif

  pDnode->wrappers[DNODE].func = dmGetMgmtFunc();
  pDnode->wrappers[MNODE].func = mmGetMgmtFunc();
  pDnode->wrappers[VNODE].func = vmGetMgmtFunc();
  pDnode->wrappers[QNODE].func = qmGetMgmtFunc();
  pDnode->wrappers[SNODE].func = smGetMgmtFunc();

  for (EDndNodeType ntype = DNODE; ntype < NODE_END; ++ntype) {
    SMgmtWrapper *pWrapper = &pDnode->wrappers[ntype];
    pWrapper->pDnode = pDnode;
    pWrapper->name = dmNodeName(ntype);
    pWrapper->ntype = ntype;
    taosThreadRwlockInit(&pWrapper->lock, NULL);

    snprintf(path, sizeof(path), "%s%s%s", tsDataDir, TD_DIRSEP, pWrapper->name);
    pWrapper->path = taosStrdup(path);
    if (pWrapper->path == NULL) {
      terrno = TSDB_CODE_OUT_OF_MEMORY;
      goto _OVER;
    }

    pWrapper->required = dmRequireNode(pDnode, pWrapper);
  }

  pDnode->lockfile = dmCheckRunning(tsDataDir);
  if (pDnode->lockfile == NULL) {
    goto _OVER;
  }

  if(dmInitModule(pDnode) != 0) {
    goto _OVER;
  }

  indexInit(tsNumOfCommitThreads);
  streamMetaInit();

  dmReportStartup("dnode-transport", "initialized");
  dDebug("dnode is created, ptr:%p", pDnode);
  code = 0;

_OVER:
  if (code != 0 && pDnode != NULL) {
    dmClearVars(pDnode);
    pDnode = NULL;
    dError("failed to create dnode since %s", terrstr());
  }

  return code;
}

void dmCleanupDnode(SDnode *pDnode) {
  if (pDnode == NULL) return;

  dmCleanupClient(pDnode);
  dmCleanupServer(pDnode);
  dmClearVars(pDnode);
  rpcCleanup();
  streamMetaCleanup();
  indexCleanup();
  taosConvDestroy();

#ifdef TD_TSZ
  // compress destroy
  tsCompressExit();
#endif

  dDebug("dnode is closed, ptr:%p", pDnode);
}

void dmSetStatus(SDnode *pDnode, EDndRunStatus status) {
  if (pDnode->status != status) {
    dDebug("dnode status set from %s to %s", dmStatStr(pDnode->status), dmStatStr(status));
    pDnode->status = status;
  }
}

SMgmtWrapper *dmAcquireWrapper(SDnode *pDnode, EDndNodeType ntype) {
  SMgmtWrapper *pWrapper = &pDnode->wrappers[ntype];
  SMgmtWrapper *pRetWrapper = pWrapper;

  taosThreadRwlockRdlock(&pWrapper->lock);
  if (pWrapper->deployed) {
    int32_t refCount = atomic_add_fetch_32(&pWrapper->refCount, 1);
    // dTrace("node:%s, is acquired, ref:%d", pWrapper->name, refCount);
  } else {
    pRetWrapper = NULL;
  }
  taosThreadRwlockUnlock(&pWrapper->lock);

  return pRetWrapper;
}

int32_t dmMarkWrapper(SMgmtWrapper *pWrapper) {
  int32_t code = 0;

  taosThreadRwlockRdlock(&pWrapper->lock);
  if (pWrapper->deployed) {
    int32_t refCount = atomic_add_fetch_32(&pWrapper->refCount, 1);
    // dTrace("node:%s, is marked, ref:%d", pWrapper->name, refCount);
  } else {
    switch (pWrapper->ntype) {
      case MNODE:
        terrno = TSDB_CODE_MNODE_NOT_FOUND;
        break;
      case QNODE:
        terrno = TSDB_CODE_QNODE_NOT_FOUND;
        break;
      case SNODE:
        terrno = TSDB_CODE_SNODE_NOT_FOUND;
        break;
      case VNODE:
        terrno = TSDB_CODE_VND_STOPPED;
        break;
      default:
        terrno = TSDB_CODE_APP_IS_STOPPING;
        break;
    }
    code = -1;
  }
  taosThreadRwlockUnlock(&pWrapper->lock);

  return code;
}

void dmReleaseWrapper(SMgmtWrapper *pWrapper) {
  if (pWrapper == NULL) return;

  taosThreadRwlockRdlock(&pWrapper->lock);
  int32_t refCount = atomic_sub_fetch_32(&pWrapper->refCount, 1);
  taosThreadRwlockUnlock(&pWrapper->lock);
  // dTrace("node:%s, is released, ref:%d", pWrapper->name, refCount);
}

static void dmGetServerStartupStatus(SDnode *pDnode, SServerStatusRsp *pStatus) {
  SDnodeMgmt *pMgmt = pDnode->wrappers[DNODE].pMgmt;
  pStatus->details[0] = 0;

  if (pDnode->status == DND_STAT_INIT) {
    pStatus->statusCode = TSDB_SRV_STATUS_NETWORK_OK;
    snprintf(pStatus->details, sizeof(pStatus->details), "%s: %s", pDnode->startup.name, pDnode->startup.desc);
  } else if (pDnode->status == DND_STAT_STOPPED) {
    pStatus->statusCode = TSDB_SRV_STATUS_EXTING;
  } else {
    pStatus->statusCode = TSDB_SRV_STATUS_SERVICE_OK;
  }
}

void dmProcessNetTestReq(SDnode *pDnode, SRpcMsg *pMsg) {
  dDebug("msg:%p, net test req will be processed", pMsg);

  SRpcMsg rsp = {.info = pMsg->info};
  rsp.pCont = rpcMallocCont(pMsg->contLen);
  if (rsp.pCont == NULL) {
    rsp.code = TSDB_CODE_OUT_OF_MEMORY;
  } else {
    rsp.contLen = pMsg->contLen;
  }

  rpcSendResponse(&rsp);
  rpcFreeCont(pMsg->pCont);
}

void dmProcessServerStartupStatus(SDnode *pDnode, SRpcMsg *pMsg) {
  dDebug("msg:%p, server startup status req will be processed", pMsg);

  SServerStatusRsp statusRsp = {0};
  dmGetServerStartupStatus(pDnode, &statusRsp);

  SRpcMsg rsp = {.info = pMsg->info};
  int32_t contLen = tSerializeSServerStatusRsp(NULL, 0, &statusRsp);
  if (contLen < 0) {
    rsp.code = TSDB_CODE_OUT_OF_MEMORY;
  } else {
    rsp.pCont = rpcMallocCont(contLen);
    if (rsp.pCont != NULL) {
      tSerializeSServerStatusRsp(rsp.pCont, contLen, &statusRsp);
      rsp.contLen = contLen;
    }
  }

  rpcSendResponse(&rsp);
  rpcFreeCont(pMsg->pCont);
}