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_daemonCheckLockInterval  = 60;
  34 long cm_daemonTokenCheckInterval = 180;
  35 long cm_daemonCheckBusyVolInterval = 600;
  36
  37 osi_rwlock_t cm_daemonLock;
  38
  39 long cm_bkgQueueCount;          /* # of queued requests */
  40
  41 int cm_bkgWaitingForCount;      /* true if someone's waiting for cm_bkgQueueCount to drop */
  42
  43 cm_bkgRequest_t *cm_bkgListp;           /* first elt in the list of requests */
  44 cm_bkgRequest_t *cm_bkgListEndp;        /* last elt in the list of requests */
  45
  46 static int daemon_ShutdownFlag = 0;
  47
  48 void cm_IpAddrDaemon(long parm)
  49 {
  50     extern void smb_CheckVCs(void);
  51
  52     rx_StartClientThread();
  53
  54     while (daemon_ShutdownFlag == 0) {
  55         DWORD Result = NotifyAddrChange(NULL,NULL);
  56         if (Result == NO_ERROR && daemon_ShutdownFlag == 0) {
  57             Sleep(2500);
  58             osi_Log0(afsd_logp, "cm_IpAddrDaemon CheckDownServers");
  59             cm_CheckServers(CM_FLAG_CHECKVLDBSERVERS | CM_FLAG_CHECKUPSERVERS | CM_FLAG_CHECKDOWNSERVERS, NULL);
  60             cm_ForceNewConnectionsAllServers();
  61             cm_CheckServers(CM_FLAG_CHECKFILESERVERS | CM_FLAG_CHECKUPSERVERS | CM_FLAG_CHECKDOWNSERVERS, NULL);
  62             smb_CheckVCs();
  63         }
  64     }
  65 }
  66
  67 void cm_BkgDaemon(long parm)
  68 {
  69     cm_bkgRequest_t *rp;
  70     afs_int32 code;
  71
  72     rx_StartClientThread();
  73
  74     lock_ObtainWrite(&cm_daemonLock);
  75     while (daemon_ShutdownFlag == 0) {
  76         if (!cm_bkgListEndp) {
  77             osi_SleepW((LONG_PTR)&cm_bkgListp, &cm_daemonLock);
  78             lock_ObtainWrite(&cm_daemonLock);
  79             continue;
  80         }
  81
  82         /* we found a request */
  83         for (rp = cm_bkgListEndp; rp; rp = (cm_bkgRequest_t *) osi_QPrev(&rp->q))
  84         {
  85             if (cm_ServerAvailable(&rp->scp->fid, rp->userp))
  86                 break;
  87         }
  88         if (rp == NULL) {
  89             /* we couldn't find a request that we could process at the current time */
  90             lock_ReleaseWrite(&cm_daemonLock);
  91             Sleep(1000);
  92             lock_ObtainWrite(&cm_daemonLock);
  93             continue;
  94         }
  95
  96         osi_QRemoveHT((osi_queue_t **) &cm_bkgListp, (osi_queue_t **) &cm_bkgListEndp, &rp->q);
  97         osi_assert(cm_bkgQueueCount-- > 0);
  98         lock_ReleaseWrite(&cm_daemonLock);
  99
 100         osi_Log1(afsd_logp,"cm_BkgDaemon processing request 0x%p", rp);
 101
 102 #ifdef DEBUG_REFCOUNT
 103         osi_Log2(afsd_logp,"cm_BkgDaemon (before) scp 0x%x ref %d",rp->scp, rp->scp->refCount);
 104 #endif
 105         code = (*rp->procp)(rp->scp, rp->p1, rp->p2, rp->p3, rp->p4, rp->userp);
 106 #ifdef DEBUG_REFCOUNT
 107         osi_Log2(afsd_logp,"cm_BkgDaemon (after) scp 0x%x ref %d",rp->scp, rp->scp->refCount);
 108 #endif
 109         if (code == 0) {
 110             cm_ReleaseUser(rp->userp);
 111             cm_ReleaseSCache(rp->scp);
 112             free(rp);
 113         }
 114
 115         lock_ObtainWrite(&cm_daemonLock);
 116
 117         switch ( code ) {
 118         case 0: /* success */
 119             osi_Log1(afsd_logp,"cm_BkgDaemon SUCCESS: request 0x%p", rp);
 120             break;
 121         case CM_ERROR_TIMEDOUT: /* or server restarting */
 122         case CM_ERROR_RETRY:
 123         case CM_ERROR_WOULDBLOCK:
 124         case CM_ERROR_ALLBUSY:
 125         case CM_ERROR_ALLDOWN:
 126         case CM_ERROR_ALLOFFLINE:
 127         case CM_ERROR_PARTIALWRITE:
 128             osi_Log2(afsd_logp,"cm_BkgDaemon re-queueing failed request 0x%p code 0x%x",
 129                      rp, code);
 130             cm_bkgQueueCount++;
 131             osi_QAddT((osi_queue_t **) &cm_bkgListp, (osi_queue_t **)&cm_bkgListEndp, &rp->q);
 132             break;
 133         default:
 134             osi_Log2(afsd_logp,"cm_BkgDaemon FAILED: request dropped 0x%p code 0x%x",
 135                      rp, code);
 136         }
 137     }
 138     lock_ReleaseWrite(&cm_daemonLock);
 139 }
 140
 141 void cm_QueueBKGRequest(cm_scache_t *scp, cm_bkgProc_t *procp, afs_uint32 p1, afs_uint32 p2, afs_uint32 p3, afs_uint32 p4,
 142         cm_user_t *userp)
 143 {
 144     cm_bkgRequest_t *rp;
 145
 146     rp = malloc(sizeof(*rp));
 147     memset(rp, 0, sizeof(*rp));
 148
 149     cm_HoldSCache(scp);
 150     rp->scp = scp;
 151     cm_HoldUser(userp);
 152     rp->userp = userp;
 153     rp->procp = procp;
 154     rp->p1 = p1;
 155     rp->p2 = p2;
 156     rp->p3 = p3;
 157     rp->p4 = p4;
 158
 159     lock_ObtainWrite(&cm_daemonLock);
 160     cm_bkgQueueCount++;
 161     osi_QAdd((osi_queue_t **) &cm_bkgListp, &rp->q);
 162     if (!cm_bkgListEndp)
 163         cm_bkgListEndp = rp;
 164     lock_ReleaseWrite(&cm_daemonLock);
 165
 166     osi_Wakeup((LONG_PTR) &cm_bkgListp);
 167 }
 168
 169 static int
 170 IsWindowsFirewallPresent(void)
 171 {
 172     SC_HANDLE scm;
 173     SC_HANDLE svc;
 174     BOOLEAN flag;
 175     BOOLEAN result = FALSE;
 176     LPQUERY_SERVICE_CONFIG pConfig = NULL;
 177     DWORD BufSize;
 178     LONG status;
 179
 180     /* Open services manager */
 181     scm = OpenSCManager(NULL, NULL, GENERIC_READ);
 182     if (!scm) return FALSE;
 183
 184     /* Open Windows Firewall service */
 185     svc = OpenService(scm, "MpsSvc", SERVICE_QUERY_CONFIG);
 186     if (!svc) {
 187         afsi_log("MpsSvc Service could not be opened for query: 0x%x", GetLastError());
 188         svc = OpenService(scm, "SharedAccess", SERVICE_QUERY_CONFIG);
 189         if (!svc)
 190             afsi_log("SharedAccess Service could not be opened for query: 0x%x", GetLastError());
 191     }
 192     if (!svc)
 193         goto close_scm;
 194
 195     /* Query Windows Firewall service config, first just to get buffer size */
 196     /* Expected to fail, so don't test return value */
 197     (void) QueryServiceConfig(svc, NULL, 0, &BufSize);
 198     status = GetLastError();
 199     if (status != ERROR_INSUFFICIENT_BUFFER)
 200         goto close_svc;
 201
 202     /* Allocate buffer */
 203     pConfig = (LPQUERY_SERVICE_CONFIG)GlobalAlloc(GMEM_FIXED,BufSize);
 204     if (!pConfig)
 205         goto close_svc;
 206
 207     /* Query Windows Firewall service config, this time for real */
 208     flag = QueryServiceConfig(svc, pConfig, BufSize, &BufSize);
 209     if (!flag) {
 210         afsi_log("QueryServiceConfig failed: 0x%x", GetLastError());
 211         goto free_pConfig;
 212     }
 213
 214     /* Is it autostart? */
 215     afsi_log("AutoStart 0x%x", pConfig->dwStartType);
 216     if (pConfig->dwStartType < SERVICE_DEMAND_START)
 217         result = TRUE;
 218
 219   free_pConfig:
 220     GlobalFree(pConfig);
 221   close_svc:
 222     CloseServiceHandle(svc);
 223   close_scm:
 224     CloseServiceHandle(scm);
 225
 226     return result;
 227 }
 228
 229 void
 230 cm_DaemonCheckInit(void)
 231 {
 232     HKEY parmKey;
 233     DWORD dummyLen;
 234     DWORD dummy;
 235     DWORD code;
 236
 237     code = RegOpenKeyEx(HKEY_LOCAL_MACHINE, AFSREG_CLT_SVC_PARAM_SUBKEY,
 238                          0, KEY_QUERY_VALUE, &parmKey);
 239     if (code)
 240         return;
 241
 242     dummyLen = sizeof(DWORD);
 243     code = RegQueryValueEx(parmKey, "DownServerCheckInterval", NULL, NULL,
 244                             (BYTE *) &dummy, &dummyLen);
 245     if (code == ERROR_SUCCESS)
 246         cm_daemonCheckDownInterval = dummy;
 247
 248     dummyLen = sizeof(DWORD);
 249     code = RegQueryValueEx(parmKey, "UpServerCheckInterval", NULL, NULL,
 250                             (BYTE *) &dummy, &dummyLen);
 251     if (code == ERROR_SUCCESS)
 252         cm_daemonCheckUpInterval = dummy;
 253
 254     dummyLen = sizeof(DWORD);
 255     code = RegQueryValueEx(parmKey, "VolumeCheckInterval", NULL, NULL,
 256                             (BYTE *) &dummy, &dummyLen);
 257     if (code == ERROR_SUCCESS)
 258         cm_daemonCheckVolInterval = dummy;
 259
 260     dummyLen = sizeof(DWORD);
 261     code = RegQueryValueEx(parmKey, "CallbackCheckInterval", NULL, NULL,
 262                             (BYTE *) &dummy, &dummyLen);
 263     if (code == ERROR_SUCCESS)
 264         cm_daemonCheckCBInterval = dummy;
 265
 266     dummyLen = sizeof(DWORD);
 267     code = RegQueryValueEx(parmKey, "LockCheckInterval", NULL, NULL,
 268                             (BYTE *) &dummy, &dummyLen);
 269     if (code == ERROR_SUCCESS)
 270         cm_daemonCheckLockInterval = dummy;
 271
 272     dummyLen = sizeof(DWORD);
 273     code = RegQueryValueEx(parmKey, "TokenCheckInterval", NULL, NULL,
 274                             (BYTE *) &dummy, &dummyLen);
 275     if (code == ERROR_SUCCESS)
 276         cm_daemonTokenCheckInterval = dummy;
 277
 278     dummyLen = sizeof(DWORD);
 279     code = RegQueryValueEx(parmKey, "BusyVolumeCheckInterval", NULL, NULL,
 280                             (BYTE *) &dummy, &dummyLen);
 281     if (code == ERROR_SUCCESS)
 282         cm_daemonCheckBusyVolInterval = dummy;
 283
 284     RegCloseKey(parmKey);
 285 }
 286
 287 /* periodic check daemon */
 288 void cm_Daemon(long parm)
 289 {
 290     time_t now;
 291     time_t lastLockCheck;
 292     time_t lastVolCheck;
 293     time_t lastCBExpirationCheck;
 294     time_t lastDownServerCheck;
 295     time_t lastUpServerCheck;
 296     time_t lastTokenCacheCheck;
 297     time_t lastBusyVolCheck;
 298     char thostName[200];
 299     unsigned long code;
 300     struct hostent *thp;
 301     HMODULE hHookDll;
 302     int configureFirewall = IsWindowsFirewallPresent();
 303
 304     if (!configureFirewall) {
 305         afsi_log("No Windows Firewall detected");
 306     }
 307
 308     /* ping all file servers, up or down, with unauthenticated connection,
 309      * to find out whether we have all our callbacks from the server still.
 310      * Also, ping down VLDBs.
 311      */
 312     /*
 313      * Seed the random number generator with our own address, so that
 314      * clients starting at the same time don't all do vol checks at the
 315      * same time.
 316      */
 317     gethostname(thostName, sizeof(thostName));
 318     thp = gethostbyname(thostName);
 319     if (thp == NULL)    /* In djgpp, gethostname returns the netbios
 320                            name of the machine.  gethostbyname will fail
 321                            looking this up if it differs from DNS name. */
 322         code = 0;
 323     else
 324         memcpy(&code, thp->h_addr_list[0], 4);
 325
 326     srand(ntohl(code));
 327
 328     cm_DaemonCheckInit();
 329
 330     now = osi_Time();
 331     lastVolCheck = now - cm_daemonCheckVolInterval/2 + (rand() % cm_daemonCheckVolInterval);
 332     lastCBExpirationCheck = now - cm_daemonCheckCBInterval/2 + (rand() % cm_daemonCheckCBInterval);
 333     lastLockCheck = now - cm_daemonCheckLockInterval/2 + (rand() % cm_daemonCheckLockInterval);
 334     lastDownServerCheck = now - cm_daemonCheckDownInterval/2 + (rand() % cm_daemonCheckDownInterval);
 335     lastUpServerCheck = now - cm_daemonCheckUpInterval/2 + (rand() % cm_daemonCheckUpInterval);
 336     lastTokenCacheCheck = now - cm_daemonTokenCheckInterval/2 + (rand() % cm_daemonTokenCheckInterval);
 337     lastBusyVolCheck = now - cm_daemonCheckBusyVolInterval/2 * (rand() % cm_daemonCheckBusyVolInterval);
 338
 339     while (daemon_ShutdownFlag == 0) {
 340         /* check to see if the listener threads halted due to network
 341          * disconnect or other issues.  If so, attempt to restart them.
 342          */
 343         smb_RestartListeners();
 344
 345         if (configureFirewall) {
 346             /* Open Microsoft Firewall to allow in port 7001 */
 347             switch (icf_CheckAndAddAFSPorts(AFS_PORTSET_CLIENT)) {
 348             case 0:
 349                 afsi_log("Windows Firewall Configuration succeeded");
 350                 configureFirewall = 0;
 351                 break;
 352             case 1:
 353                 afsi_log("Invalid Windows Firewall Port Set");
 354                 break;
 355             case 2:
 356                 afsi_log("Unable to open Windows Firewall Profile");
 357                 break;
 358             case 3:
 359                 afsi_log("Unable to create/modify Windows Firewall Port entries");
 360                 break;
 361             default:
 362                 afsi_log("Unknown Windows Firewall Configuration error");
 363             }
 364         }
 365
 366         /* find out what time it is */
 367         now = osi_Time();
 368
 369         /* check down servers */
 370         if (now > lastDownServerCheck + cm_daemonCheckDownInterval) {
 371             lastDownServerCheck = now;
 372             osi_Log0(afsd_logp, "cm_Daemon CheckDownServers");
 373             cm_CheckServers(CM_FLAG_CHECKDOWNSERVERS, NULL);
 374             now = osi_Time();
 375         }
 376
 377         /* check up servers */
 378         if (now > lastUpServerCheck + cm_daemonCheckUpInterval) {
 379             lastUpServerCheck = now;
 380             osi_Log0(afsd_logp, "cm_Daemon CheckUpServers");
 381             cm_CheckServers(CM_FLAG_CHECKUPSERVERS, NULL);
 382             now = osi_Time();
 383         }
 384
 385         if (now > lastVolCheck + cm_daemonCheckVolInterval) {
 386             lastVolCheck = now;
 387             cm_RefreshVolumes();
 388             now = osi_Time();
 389         }
 390
 391         if (now > lastBusyVolCheck + cm_daemonCheckBusyVolInterval) {
 392             lastVolCheck = now;
 393             cm_CheckOfflineVolumes();
 394             now = osi_Time();
 395         }
 396
 397         if (now > lastCBExpirationCheck + cm_daemonCheckCBInterval) {
 398             lastCBExpirationCheck = now;
 399             cm_CheckCBExpiration();
 400             now = osi_Time();
 401         }
 402
 403         if (now > lastLockCheck + cm_daemonCheckLockInterval) {
 404             lastLockCheck = now;
 405             cm_CheckLocks();
 406             now = osi_Time();
 407         }
 408
 409         if (now > lastTokenCacheCheck + cm_daemonTokenCheckInterval) {
 410             lastTokenCacheCheck = now;
 411             cm_CheckTokenCache(now);
 412             now = osi_Time();
 413         }
 414
 415         /* allow an exit to be called prior to stopping the service */
 416         hHookDll = LoadLibrary(AFSD_HOOK_DLL);
 417         if (hHookDll)
 418         {
 419             BOOL hookRc = TRUE;
 420             AfsdDaemonHook daemonHook = ( AfsdDaemonHook ) GetProcAddress(hHookDll, AFSD_DAEMON_HOOK);
 421             if (daemonHook)
 422             {
 423                 hookRc = daemonHook();
 424             }
 425             FreeLibrary(hHookDll);
 426             hHookDll = NULL;
 427
 428             if (hookRc == FALSE)
 429             {
 430                 SetEvent(WaitToTerminate);
 431             }
 432         }
 433
 434         thrd_Sleep(30 * 1000);          /* sleep 30 seconds */
 435         if (daemon_ShutdownFlag == 1)
 436             return;
 437     }
 438 }
 439
 440 void cm_DaemonShutdown(void)
 441 {
 442     daemon_ShutdownFlag = 1;
 443 }
 444
 445 void cm_InitDaemon(int nDaemons)
 446 {
 447     static osi_once_t once;
 448     long pid;
 449     thread_t phandle;
 450     int i;
 451
 452     if (osi_Once(&once)) {
 453         lock_InitializeRWLock(&cm_daemonLock, "cm_daemonLock");
 454         osi_EndOnce(&once);
 455
 456         /* creating IP Address Change monitor daemon */
 457         phandle = thrd_Create((SecurityAttrib) 0, 0,
 458                                (ThreadFunc) cm_IpAddrDaemon, 0, 0, &pid, "cm_IpAddrDaemon");
 459         osi_assert(phandle != NULL);
 460         thrd_CloseHandle(phandle);
 461
 462         /* creating pinging daemon */
 463         phandle = thrd_Create((SecurityAttrib) 0, 0,
 464                                (ThreadFunc) cm_Daemon, 0, 0, &pid, "cm_Daemon");
 465         osi_assert(phandle != NULL);
 466         thrd_CloseHandle(phandle);
 467
 468         for(i=0; i < nDaemons; i++) {
 469             phandle = thrd_Create((SecurityAttrib) 0, 0,
 470                                    (ThreadFunc) cm_BkgDaemon, 0, 0, &pid,
 471                                    "cm_BkgDaemon");
 472             osi_assert(phandle != NULL);
 473             thrd_CloseHandle(phandle);
 474         }
 475     }
 476 }