src/WINNT/afsd/cm_daemon.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #include <afs/param.h>
  11 #include <afs/stds.h>
  12
  13 #include <windows.h>
  14 #include <winsock2.h>
  15 #include <iphlpapi.h>
  16 #include <stdlib.h>
  17 #include <malloc.h>
  18 #include <string.h>
  19
  20 #include "afsd.h"
  21
  22 #include <rx/rx.h>
  23 #include <rx/rx_prototypes.h>
  24 #include <WINNT/afsreg.h>
  25
  26 #include "afsicf.h"
  27
  28 /* in seconds */
  29 long cm_daemonCheckDownInterval  = 180;
  30 long cm_daemonCheckUpInterval    = 240;
  31 long cm_daemonCheckVolInterval   = 3600;
  32 long cm_daemonCheckCBInterval    = 60;
  33 long cm_daemonCheckVolCBInterval = 0;
  34 long cm_daemonCheckLockInterval  = 60;
  35 long cm_daemonTokenCheckInterval = 180;
  36 long cm_daemonCheckOfflineVolInterval = 600;
  37
  38 osi_rwlock_t cm_daemonLock;
  39
  40 long cm_bkgQueueCount;          /* # of queued requests */
  41
  42 int cm_bkgWaitingForCount;      /* true if someone's waiting for cm_bkgQueueCount to drop */
  43
  44 cm_bkgRequest_t *cm_bkgListp;           /* first elt in the list of requests */
  45 cm_bkgRequest_t *cm_bkgListEndp;        /* last elt in the list of requests */
  46
  47 static int daemon_ShutdownFlag = 0;
  48 static int cm_nDaemons = 0;
  49
  50 static EVENT_HANDLE cm_Daemon_ShutdownEvent = NULL;
  51 static EVENT_HANDLE cm_IPAddrDaemon_ShutdownEvent = NULL;
  52 static EVENT_HANDLE cm_BkgDaemon_ShutdownEvent[CM_MAX_DAEMONS] =
  53        {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
  54
  55 void cm_IpAddrDaemon(long parm)
  56 {
  57     extern void smb_CheckVCs(void);
  58     char * name = "cm_IPAddrDaemon_ShutdownEvent";
  59
  60     cm_IPAddrDaemon_ShutdownEvent = thrd_CreateEvent(NULL, FALSE, FALSE, name);
  61     if ( GetLastError() == ERROR_ALREADY_EXISTS )
  62         afsi_log("Event Object Already Exists: %s", name);
  63
  64     rx_StartClientThread();
  65
  66     while (daemon_ShutdownFlag == 0) {
  67         DWORD Result;
  68
  69         thrd_SetEvent(cm_IPAddrDaemon_ShutdownEvent);
  70         Result = NotifyAddrChange(NULL,NULL);
  71         if (Result == NO_ERROR && daemon_ShutdownFlag == 0) {
  72             smb_LanAdapterChange();
  73             thrd_ResetEvent(cm_IPAddrDaemon_ShutdownEvent);
  74             Sleep(2500);
  75             if (daemon_ShutdownFlag == 0) {
  76                 osi_Log0(afsd_logp, "cm_IpAddrDaemon CheckDownServers");
  77                 cm_CheckServers(CM_FLAG_CHECKVLDBSERVERS | CM_FLAG_CHECKUPSERVERS | CM_FLAG_CHECKDOWNSERVERS, NULL);
  78                 cm_ForceNewConnectionsAllServers();
  79                 cm_CheckServers(CM_FLAG_CHECKFILESERVERS | CM_FLAG_CHECKUPSERVERS | CM_FLAG_CHECKDOWNSERVERS, NULL);
  80                 smb_CheckVCs();
  81                 cm_VolStatus_Network_Addr_Change();
  82             }
  83         }
  84     }
  85
  86     thrd_SetEvent(cm_IPAddrDaemon_ShutdownEvent);
  87 }
  88
  89 void cm_BkgDaemon(void * parm)
  90 {
  91     cm_bkgRequest_t *rp;
  92     afs_int32 code;
  93     char name[32] = "";
  94     long daemonID = (long)parm;
  95
  96     snprintf(name, sizeof(name), "cm_BkgDaemon_ShutdownEvent%d", daemonID);
  97
  98     cm_BkgDaemon_ShutdownEvent[daemonID] = thrd_CreateEvent(NULL, FALSE, FALSE, name);
  99     if ( GetLastError() == ERROR_ALREADY_EXISTS )
 100         afsi_log("Event Object Already Exists: %s", name);
 101
 102     rx_StartClientThread();
 103
 104     lock_ObtainWrite(&cm_daemonLock);
 105     while (daemon_ShutdownFlag == 0) {
 106         if (!cm_bkgListEndp) {
 107             osi_SleepW((LONG_PTR)&cm_bkgListp, &cm_daemonLock);
 108             lock_ObtainWrite(&cm_daemonLock);
 109             continue;
 110         }
 111
 112         /* we found a request */
 113         for (rp = cm_bkgListEndp; rp; rp = (cm_bkgRequest_t *) osi_QPrev(&rp->q))
 114         {
 115             if (cm_ServerAvailable(&rp->scp->fid, rp->userp))
 116                 break;
 117         }
 118         if (rp == NULL) {
 119             /* we couldn't find a request that we could process at the current time */
 120             lock_ReleaseWrite(&cm_daemonLock);
 121             Sleep(1000);
 122             lock_ObtainWrite(&cm_daemonLock);
 123             continue;
 124         }
 125
 126         osi_QRemoveHT((osi_queue_t **) &cm_bkgListp, (osi_queue_t **) &cm_bkgListEndp, &rp->q);
 127         osi_assertx(cm_bkgQueueCount-- > 0, "cm_bkgQueueCount 0");
 128         lock_ReleaseWrite(&cm_daemonLock);
 129
 130         osi_Log1(afsd_logp,"cm_BkgDaemon processing request 0x%p", rp);
 131
 132 #ifdef DEBUG_REFCOUNT
 133         osi_Log2(afsd_logp,"cm_BkgDaemon (before) scp 0x%x ref %d",rp->scp, rp->scp->refCount);
 134 #endif
 135         code = (*rp->procp)(rp->scp, rp->p1, rp->p2, rp->p3, rp->p4, rp->userp);
 136 #ifdef DEBUG_REFCOUNT
 137         osi_Log2(afsd_logp,"cm_BkgDaemon (after) scp 0x%x ref %d",rp->scp, rp->scp->refCount);
 138 #endif
 139         if (code == 0) {
 140             cm_ReleaseUser(rp->userp);
 141             cm_ReleaseSCache(rp->scp);
 142             free(rp);
 143         }
 144
 145         lock_ObtainWrite(&cm_daemonLock);
 146
 147         switch ( code ) {
 148         case 0: /* success */
 149             osi_Log1(afsd_logp,"cm_BkgDaemon SUCCESS: request 0x%p", rp);
 150             break;
 151         case CM_ERROR_TIMEDOUT: /* or server restarting */
 152         case CM_ERROR_RETRY:
 153         case CM_ERROR_WOULDBLOCK:
 154         case CM_ERROR_ALLBUSY:
 155         case CM_ERROR_ALLDOWN:
 156         case CM_ERROR_ALLOFFLINE:
 157         case CM_ERROR_PARTIALWRITE:
 158             osi_Log2(afsd_logp,"cm_BkgDaemon re-queueing failed request 0x%p code 0x%x",
 159                      rp, code);
 160             cm_bkgQueueCount++;
 161             osi_QAddT((osi_queue_t **) &cm_bkgListp, (osi_queue_t **)&cm_bkgListEndp, &rp->q);
 162             break;
 163         default:
 164             osi_Log2(afsd_logp,"cm_BkgDaemon FAILED: request dropped 0x%p code 0x%x",
 165                      rp, code);
 166         }
 167     }
 168     lock_ReleaseWrite(&cm_daemonLock);
 169
 170     thrd_SetEvent(cm_BkgDaemon_ShutdownEvent[daemonID]);
 171
 172 }
 173
 174 void cm_QueueBKGRequest(cm_scache_t *scp, cm_bkgProc_t *procp, afs_uint32 p1, afs_uint32 p2, afs_uint32 p3, afs_uint32 p4,
 175         cm_user_t *userp)
 176 {
 177     cm_bkgRequest_t *rp;
 178
 179     rp = malloc(sizeof(*rp));
 180     memset(rp, 0, sizeof(*rp));
 181
 182     cm_HoldSCache(scp);
 183     rp->scp = scp;
 184     cm_HoldUser(userp);
 185     rp->userp = userp;
 186     rp->procp = procp;
 187     rp->p1 = p1;
 188     rp->p2 = p2;
 189     rp->p3 = p3;
 190     rp->p4 = p4;
 191
 192     lock_ObtainWrite(&cm_daemonLock);
 193     cm_bkgQueueCount++;
 194     osi_QAdd((osi_queue_t **) &cm_bkgListp, &rp->q);
 195     if (!cm_bkgListEndp)
 196         cm_bkgListEndp = rp;
 197     lock_ReleaseWrite(&cm_daemonLock);
 198
 199     osi_Wakeup((LONG_PTR) &cm_bkgListp);
 200 }
 201
 202 static int
 203 IsWindowsFirewallPresent(void)
 204 {
 205     SC_HANDLE scm;
 206     SC_HANDLE svc;
 207     BOOLEAN flag;
 208     BOOLEAN result = FALSE;
 209     LPQUERY_SERVICE_CONFIG pConfig = NULL;
 210     DWORD BufSize;
 211     LONG status;
 212
 213     /* Open services manager */
 214     scm = OpenSCManager(NULL, NULL, GENERIC_READ);
 215     if (!scm) return FALSE;
 216
 217     /* Open Windows Firewall service */
 218     svc = OpenService(scm, "MpsSvc", SERVICE_QUERY_CONFIG);
 219     if (!svc) {
 220         afsi_log("MpsSvc Service could not be opened for query: 0x%x", GetLastError());
 221         svc = OpenService(scm, "SharedAccess", SERVICE_QUERY_CONFIG);
 222         if (!svc)
 223             afsi_log("SharedAccess Service could not be opened for query: 0x%x", GetLastError());
 224     }
 225     if (!svc)
 226         goto close_scm;
 227
 228     /* Query Windows Firewall service config, first just to get buffer size */
 229     /* Expected to fail, so don't test return value */
 230     (void) QueryServiceConfig(svc, NULL, 0, &BufSize);
 231     status = GetLastError();
 232     if (status != ERROR_INSUFFICIENT_BUFFER)
 233         goto close_svc;
 234
 235     /* Allocate buffer */
 236     pConfig = (LPQUERY_SERVICE_CONFIG)GlobalAlloc(GMEM_FIXED,BufSize);
 237     if (!pConfig)
 238         goto close_svc;
 239
 240     /* Query Windows Firewall service config, this time for real */
 241     flag = QueryServiceConfig(svc, pConfig, BufSize, &BufSize);
 242     if (!flag) {
 243         afsi_log("QueryServiceConfig failed: 0x%x", GetLastError());
 244         goto free_pConfig;
 245     }
 246
 247     /* Is it autostart? */
 248     afsi_log("AutoStart 0x%x", pConfig->dwStartType);
 249     if (pConfig->dwStartType < SERVICE_DEMAND_START)
 250         result = TRUE;
 251
 252   free_pConfig:
 253     GlobalFree(pConfig);
 254   close_svc:
 255     CloseServiceHandle(svc);
 256   close_scm:
 257     CloseServiceHandle(scm);
 258
 259     return result;
 260 }
 261
 262 void
 263 cm_DaemonCheckInit(void)
 264 {
 265     HKEY parmKey;
 266     DWORD dummyLen;
 267     DWORD dummy;
 268     DWORD code;
 269
 270     code = RegOpenKeyEx(HKEY_LOCAL_MACHINE, AFSREG_CLT_SVC_PARAM_SUBKEY,
 271                          0, KEY_QUERY_VALUE, &parmKey);
 272     if (code)
 273         return;
 274
 275     dummyLen = sizeof(DWORD);
 276     code = RegQueryValueEx(parmKey, "daemonCheckDownInterval", NULL, NULL,
 277                             (BYTE *) &dummy, &dummyLen);
 278     if (code == ERROR_SUCCESS)
 279         cm_daemonCheckDownInterval = dummy;
 280     afsi_log("daemonCheckDownInterval is %d", cm_daemonCheckDownInterval);
 281
 282     dummyLen = sizeof(DWORD);
 283     code = RegQueryValueEx(parmKey, "daemonCheckUpInterval", NULL, NULL,
 284                             (BYTE *) &dummy, &dummyLen);
 285     if (code == ERROR_SUCCESS)
 286         cm_daemonCheckUpInterval = dummy;
 287     afsi_log("daemonCheckUpInterval is %d", cm_daemonCheckUpInterval);
 288
 289     dummyLen = sizeof(DWORD);
 290     code = RegQueryValueEx(parmKey, "daemonCheckVolInterval", NULL, NULL,
 291                             (BYTE *) &dummy, &dummyLen);
 292     if (code == ERROR_SUCCESS)
 293         cm_daemonCheckVolInterval = dummy;
 294     afsi_log("daemonCheckVolInterval is %d", cm_daemonCheckVolInterval);
 295
 296     dummyLen = sizeof(DWORD);
 297     code = RegQueryValueEx(parmKey, "daemonCheckCBInterval", NULL, NULL,
 298                             (BYTE *) &dummy, &dummyLen);
 299     if (code == ERROR_SUCCESS)
 300         cm_daemonCheckCBInterval = dummy;
 301     afsi_log("daemonCheckCBInterval is %d", cm_daemonCheckCBInterval);
 302
 303     dummyLen = sizeof(DWORD);
 304     code = RegQueryValueEx(parmKey, "daemonCheckVolCBInterval", NULL, NULL,
 305                             (BYTE *) &dummy, &dummyLen);
 306     if (code == ERROR_SUCCESS)
 307         cm_daemonCheckVolCBInterval = dummy;
 308     afsi_log("daemonCheckVolCBInterval is %d", cm_daemonCheckVolCBInterval);
 309
 310     dummyLen = sizeof(DWORD);
 311     code = RegQueryValueEx(parmKey, "daemonCheckLockInterval", NULL, NULL,
 312                             (BYTE *) &dummy, &dummyLen);
 313     if (code == ERROR_SUCCESS)
 314         cm_daemonCheckLockInterval = dummy;
 315     afsi_log("daemonCheckLockInterval is %d", cm_daemonCheckLockInterval);
 316
 317     dummyLen = sizeof(DWORD);
 318     code = RegQueryValueEx(parmKey, "daemonCheckTokenInterval", NULL, NULL,
 319                             (BYTE *) &dummy, &dummyLen);
 320     if (code == ERROR_SUCCESS)
 321         cm_daemonTokenCheckInterval = dummy;
 322     afsi_log("daemonCheckTokenInterval is %d", cm_daemonTokenCheckInterval);
 323
 324     dummyLen = sizeof(DWORD);
 325     code = RegQueryValueEx(parmKey, "daemonCheckOfflineVolInterval", NULL, NULL,
 326                             (BYTE *) &dummy, &dummyLen);
 327     if (code == ERROR_SUCCESS)
 328         cm_daemonCheckOfflineVolInterval = dummy;
 329     afsi_log("daemonCheckOfflineVolInterval is %d", cm_daemonCheckOfflineVolInterval);
 330
 331     RegCloseKey(parmKey);
 332 }
 333
 334 /* periodic check daemon */
 335 void cm_Daemon(long parm)
 336 {
 337     time_t now;
 338     time_t lastLockCheck;
 339     time_t lastVolCheck;
 340     time_t lastCBExpirationCheck;
 341     time_t lastVolCBRenewalCheck;
 342     time_t lastDownServerCheck;
 343     time_t lastUpServerCheck;
 344     time_t lastTokenCacheCheck;
 345     time_t lastBusyVolCheck;
 346     char thostName[200];
 347     unsigned long code;
 348     struct hostent *thp;
 349     HMODULE hHookDll;
 350     char * name = "cm_Daemon_ShutdownEvent";
 351     int configureFirewall = IsWindowsFirewallPresent();
 352
 353     cm_Daemon_ShutdownEvent = thrd_CreateEvent(NULL, FALSE, FALSE, name);
 354     if ( GetLastError() == ERROR_ALREADY_EXISTS )
 355         afsi_log("Event Object Already Exists: %s", name);
 356
 357     if (!configureFirewall) {
 358         afsi_log("No Windows Firewall detected");
 359     }
 360
 361     /* ping all file servers, up or down, with unauthenticated connection,
 362      * to find out whether we have all our callbacks from the server still.
 363      * Also, ping down VLDBs.
 364      */
 365     /*
 366      * Seed the random number generator with our own address, so that
 367      * clients starting at the same time don't all do vol checks at the
 368      * same time.
 369      */
 370     gethostname(thostName, sizeof(thostName));
 371     thp = gethostbyname(thostName);
 372     if (thp == NULL)    /* In djgpp, gethostname returns the netbios
 373                            name of the machine.  gethostbyname will fail
 374                            looking this up if it differs from DNS name. */
 375         code = 0;
 376     else
 377         memcpy(&code, thp->h_addr_list[0], 4);
 378
 379     srand(ntohl(code));
 380
 381     cm_DaemonCheckInit();
 382
 383     now = osi_Time();
 384     lastVolCheck = now - cm_daemonCheckVolInterval/2 + (rand() % cm_daemonCheckVolInterval);
 385     lastCBExpirationCheck = now - cm_daemonCheckCBInterval/2 + (rand() % cm_daemonCheckCBInterval);
 386     if (cm_daemonCheckVolCBInterval)
 387         lastVolCBRenewalCheck = now - cm_daemonCheckVolCBInterval/2 + (rand() % cm_daemonCheckVolCBInterval);
 388     lastLockCheck = now - cm_daemonCheckLockInterval/2 + (rand() % cm_daemonCheckLockInterval);
 389     lastDownServerCheck = now - cm_daemonCheckDownInterval/2 + (rand() % cm_daemonCheckDownInterval);
 390     lastUpServerCheck = now - cm_daemonCheckUpInterval/2 + (rand() % cm_daemonCheckUpInterval);
 391     lastTokenCacheCheck = now - cm_daemonTokenCheckInterval/2 + (rand() % cm_daemonTokenCheckInterval);
 392     lastBusyVolCheck = now - cm_daemonCheckOfflineVolInterval/2 * (rand() % cm_daemonCheckOfflineVolInterval);
 393
 394     while (daemon_ShutdownFlag == 0) {
 395         /* check to see if the listener threads halted due to network
 396          * disconnect or other issues.  If so, attempt to restart them.
 397          */
 398         smb_RestartListeners();
 399
 400         if (daemon_ShutdownFlag == 1)
 401             break;
 402
 403         if (configureFirewall) {
 404             /* Open Microsoft Firewall to allow in port 7001 */
 405             switch (icf_CheckAndAddAFSPorts(AFS_PORTSET_CLIENT)) {
 406             case 0:
 407                 afsi_log("Windows Firewall Configuration succeeded");
 408                 configureFirewall = 0;
 409                 break;
 410             case 1:
 411                 afsi_log("Invalid Windows Firewall Port Set");
 412                 break;
 413             case 2:
 414                 afsi_log("Unable to open Windows Firewall Profile");
 415                 break;
 416             case 3:
 417                 afsi_log("Unable to create/modify Windows Firewall Port entries");
 418                 break;
 419             default:
 420                 afsi_log("Unknown Windows Firewall Configuration error");
 421             }
 422         }
 423
 424         /* find out what time it is */
 425         now = osi_Time();
 426
 427         /* check down servers */
 428         if (now > lastDownServerCheck + cm_daemonCheckDownInterval &&
 429             daemon_ShutdownFlag == 0) {
 430             lastDownServerCheck = now;
 431             osi_Log0(afsd_logp, "cm_Daemon CheckDownServers");
 432             cm_CheckServers(CM_FLAG_CHECKDOWNSERVERS, NULL);
 433             if (daemon_ShutdownFlag == 1)
 434                 break;
 435             now = osi_Time();
 436         }
 437
 438         /* check up servers */
 439         if (now > lastUpServerCheck + cm_daemonCheckUpInterval &&
 440             daemon_ShutdownFlag == 0) {
 441             lastUpServerCheck = now;
 442             osi_Log0(afsd_logp, "cm_Daemon CheckUpServers");
 443             cm_CheckServers(CM_FLAG_CHECKUPSERVERS, NULL);
 444             if (daemon_ShutdownFlag == 1)
 445                 break;
 446             now = osi_Time();
 447         }
 448
 449         if (now > lastVolCheck + cm_daemonCheckVolInterval &&
 450             daemon_ShutdownFlag == 0) {
 451             lastVolCheck = now;
 452             cm_RefreshVolumes();
 453             if (daemon_ShutdownFlag == 1)
 454                 break;
 455             now = osi_Time();
 456         }
 457
 458         if (cm_daemonCheckVolCBInterval &&
 459             now > lastVolCBRenewalCheck + cm_daemonCheckVolCBInterval &&
 460             daemon_ShutdownFlag == 0) {
 461             lastVolCBRenewalCheck = now;
 462             cm_VolumeRenewROCallbacks();
 463             if (daemon_ShutdownFlag == 1)
 464                 break;
 465             now = osi_Time();
 466         }
 467
 468         if (now > lastBusyVolCheck + cm_daemonCheckOfflineVolInterval &&
 469             daemon_ShutdownFlag == 0) {
 470             lastVolCheck = now;
 471             cm_CheckOfflineVolumes();
 472             if (daemon_ShutdownFlag == 1)
 473                 break;
 474             now = osi_Time();
 475         }
 476
 477         if (now > lastCBExpirationCheck + cm_daemonCheckCBInterval &&
 478             daemon_ShutdownFlag == 0) {
 479             lastCBExpirationCheck = now;
 480             cm_CheckCBExpiration();
 481             if (daemon_ShutdownFlag == 1)
 482                 break;
 483             now = osi_Time();
 484         }
 485
 486         if (now > lastLockCheck + cm_daemonCheckLockInterval &&
 487             daemon_ShutdownFlag == 0) {
 488             lastLockCheck = now;
 489             cm_CheckLocks();
 490             if (daemon_ShutdownFlag == 1)
 491                 break;
 492             now = osi_Time();
 493         }
 494
 495         if (now > lastTokenCacheCheck + cm_daemonTokenCheckInterval &&
 496             daemon_ShutdownFlag == 0) {
 497             lastTokenCacheCheck = now;
 498             cm_CheckTokenCache(now);
 499             if (daemon_ShutdownFlag == 1)
 500                 break;
 501             now = osi_Time();
 502         }
 503
 504         /* allow an exit to be called prior to stopping the service */
 505         hHookDll = LoadLibrary(AFSD_HOOK_DLL);
 506         if (hHookDll)
 507         {
 508             BOOL hookRc = TRUE;
 509             AfsdDaemonHook daemonHook = ( AfsdDaemonHook ) GetProcAddress(hHookDll, AFSD_DAEMON_HOOK);
 510             if (daemonHook)
 511             {
 512                 hookRc = daemonHook();
 513             }
 514             FreeLibrary(hHookDll);
 515             hHookDll = NULL;
 516
 517             if (hookRc == FALSE)
 518             {
 519                 SetEvent(WaitToTerminate);
 520             }
 521         }
 522
 523         if (daemon_ShutdownFlag == 1) {
 524             break;
 525         }
 526         thrd_Sleep(30 * 1000);          /* sleep 30 seconds */
 527     }
 528     thrd_SetEvent(cm_Daemon_ShutdownEvent);
 529 }
 530
 531 void cm_DaemonShutdown(void)
 532 {
 533     int i;
 534     DWORD code;
 535
 536     daemon_ShutdownFlag = 1;
 537     osi_Wakeup((LONG_PTR) &cm_bkgListp);
 538
 539     /* wait for shutdown */
 540     if (cm_Daemon_ShutdownEvent)
 541         code = thrd_WaitForSingleObject_Event(cm_Daemon_ShutdownEvent, INFINITE);
 542
 543     for ( i=0; i<cm_nDaemons; i++) {
 544         if (cm_BkgDaemon_ShutdownEvent[i])
 545             code = thrd_WaitForSingleObject_Event(cm_BkgDaemon_ShutdownEvent[i], INFINITE);
 546     }
 547
 548     if (cm_IPAddrDaemon_ShutdownEvent)
 549         code = thrd_WaitForSingleObject_Event(cm_IPAddrDaemon_ShutdownEvent, INFINITE);
 550 }
 551
 552 void cm_InitDaemon(int nDaemons)
 553 {
 554     static osi_once_t once;
 555     long pid;
 556     thread_t phandle;
 557     int i;
 558
 559     cm_nDaemons = (nDaemons > CM_MAX_DAEMONS) ? CM_MAX_DAEMONS : nDaemons;
 560
 561     if (osi_Once(&once)) {
 562         lock_InitializeRWLock(&cm_daemonLock, "cm_daemonLock");
 563         osi_EndOnce(&once);
 564
 565         /* creating IP Address Change monitor daemon */
 566         phandle = thrd_Create((SecurityAttrib) 0, 0,
 567                                (ThreadFunc) cm_IpAddrDaemon, 0, 0, &pid, "cm_IpAddrDaemon");
 568         osi_assertx(phandle != NULL, "cm_IpAddrDaemon thread creation failure");
 569         thrd_CloseHandle(phandle);
 570
 571         /* creating pinging daemon */
 572         phandle = thrd_Create((SecurityAttrib) 0, 0,
 573                                (ThreadFunc) cm_Daemon, 0, 0, &pid, "cm_Daemon");
 574         osi_assertx(phandle != NULL, "cm_Daemon thread creation failure");
 575         thrd_CloseHandle(phandle);
 576
 577         for(i=0; i < cm_nDaemons; i++) {
 578             phandle = thrd_Create((SecurityAttrib) 0, 0,
 579                                    (ThreadFunc) cm_BkgDaemon, (LPVOID)i, 0, &pid,
 580                                    "cm_BkgDaemon");
 581             osi_assertx(phandle != NULL, "cm_BkgDaemon thread creation failure");
 582             thrd_CloseHandle(phandle);
 583         }
 584     }
 585 }