2 * Copyright 2000, International Business Machines Corporation and others.
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
10 #include <afs/param.h>
22 osi_rwlock_t cm_volumeLock;
25 cm_ValidateVolume(void)
30 for (volp = cm_data.allVolumesp, count = 0; volp; volp=volp->allNextp, count++) {
31 if ( volp->magic != CM_VOLUME_MAGIC ) {
32 afsi_log("cm_ValidateVolume failure: volp->magic != CM_VOLUME_MAGIC");
33 fprintf(stderr, "cm_ValidateVolume failure: volp->magic != CM_VOLUME_MAGIC\n");
36 if ( volp->cellp && volp->cellp->magic != CM_CELL_MAGIC ) {
37 afsi_log("cm_ValidateVolume failure: volp->cellp->magic != CM_CELL_MAGIC");
38 fprintf(stderr, "cm_ValidateVolume failure: volp->cellp->magic != CM_CELL_MAGIC\n");
41 if ( volp->allNextp && volp->allNextp->magic != CM_VOLUME_MAGIC ) {
42 afsi_log("cm_ValidateVolume failure: volp->allNextp->magic != CM_VOLUME_MAGIC");
43 fprintf(stderr, "cm_ValidateVolume failure: volp->allNextp->magic != CM_VOLUME_MAGIC\n");
46 if ( count != 0 && volp == cm_data.allVolumesp ||
47 count > cm_data.maxVolumes ) {
48 afsi_log("cm_ValidateVolume failure: cm_data.allVolumep loop detected");
49 fprintf(stderr, "cm_ValidateVolume failure: cm_data.allVolumep loop detected\n");
54 if ( count != cm_data.currentVolumes ) {
55 afsi_log("cm_ValidateVolume failure: count != cm_data.currentVolumes");
56 fprintf(stderr, "cm_ValidateVolume failure: count != cm_data.currentVolumes\n");
64 cm_ShutdownVolume(void)
68 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
70 for ( volType = RWVOL; volType < NUM_VOL_TYPES; volType++) {
71 if (volp->vol[volType].ID)
72 cm_VolumeStatusNotification(volp, volp->vol[volType].ID, volp->vol[volType].state, vl_alldown);
74 volp->cbExpiresRO = 0;
75 lock_FinalizeRWLock(&volp->rw);
81 void cm_InitVolume(int newFile, long maxVols)
83 static osi_once_t once;
85 if (osi_Once(&once)) {
86 lock_InitializeRWLock(&cm_volumeLock, "cm global volume lock");
89 cm_data.allVolumesp = NULL;
90 cm_data.currentVolumes = 0;
91 cm_data.maxVolumes = maxVols;
92 memset(cm_data.volumeNameHashTablep, 0, sizeof(cm_volume_t *) * cm_data.volumeHashTableSize);
93 memset(cm_data.volumeRWIDHashTablep, 0, sizeof(cm_volume_t *) * cm_data.volumeHashTableSize);
94 memset(cm_data.volumeROIDHashTablep, 0, sizeof(cm_volume_t *) * cm_data.volumeHashTableSize);
95 memset(cm_data.volumeBKIDHashTablep, 0, sizeof(cm_volume_t *) * cm_data.volumeHashTableSize);
96 cm_data.volumeLRUFirstp = cm_data.volumeLRULastp = NULL;
100 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
103 lock_InitializeRWLock(&volp->rw, "cm_volume_t rwlock");
104 volp->flags |= CM_VOLUMEFLAG_RESET;
105 for (volType = RWVOL; volType < NUM_VOL_TYPES; volType++) {
106 volp->vol[volType].state = vl_unknown;
107 volp->vol[volType].serversp = NULL;
108 if (volp->vol[volType].ID)
109 cm_VolumeStatusNotification(volp, volp->vol[volType].ID, vl_alldown, volp->vol[volType].state);
111 volp->cbExpiresRO = 0;
119 /* returns true if the id is a decimal integer, in which case we interpret it
120 * as an id. make the cache manager much simpler.
121 * Stolen from src/volser/vlprocs.c */
123 cm_VolNameIsID(char *aname)
126 while (tc = *aname++) {
127 if (tc > '9' || tc < '0')
135 * Update a volume. Caller holds a write lock on the volume (volp->rw).
138 * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:38 (JHutz)
139 * Yes, we support multihomed fileservers.
140 * Since before we got the code from IBM.
141 * But to find out about multiple addresses on a multihomed server, you need
142 * to use VL_GetEntryByNameU and VL_GetAddrsU. If you use
143 * VL_GetEntryByNameO or VL_GetEntryByNameN, the vlserver just gives you one
144 * address per server.
145 * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:39 (JHutz)
146 * see src/afs/afs_volume.c, paying particular attention to
147 * afs_NewVolumeByName, afs_SetupVolume, and InstallUVolumeEntry
148 * shadow / openafs / jaltman {ANDREW.CMU.EDU} 01:40 (Jeffrey Altman)
149 * thanks. The windows client calls the 0 versions.
150 * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:51 (JHutz)
152 * By not using the N versions, you only get up to 8 sites instead of 13.
153 * By not using the U versions, you don't get to know about multihomed serve
154 * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:52 (JHutz)
155 * Of course, you probably want to support the older versions for backward
156 * compatibility. If you do that, you need to call the newest interface
157 * first, and fall back to successively older versions if you get
161 long cm_UpdateVolumeLocation(struct cm_cell *cellp, cm_user_t *userp, cm_req_t *reqp,
166 cm_serverRef_t *tsrp;
168 struct sockaddr_in tsockAddr;
171 struct vldbentry vldbEntry;
172 struct nvldbentry nvldbEntry;
174 struct uvldbentry uvldbEntry;
179 enum volstatus rwNewstate = vl_online;
180 enum volstatus roNewstate = vl_online;
181 enum volstatus bkNewstate = vl_online;
182 #ifdef AFS_FREELANCE_CLIENT
187 /* clear out old bindings */
188 for ( volType = RWVOL; volType < NUM_VOL_TYPES; volType++) {
189 if (volp->vol[volType].serversp)
190 cm_FreeServerList(&volp->vol[volType].serversp, CM_FREESERVERLIST_DELETE);
193 #ifdef AFS_FREELANCE_CLIENT
194 if ( cellp->cellID == AFS_FAKE_ROOT_CELL_ID && volp->vol[RWVOL].ID == AFS_FAKE_ROOT_VOL_ID )
197 memset(&vldbEntry, 0, sizeof(vldbEntry));
198 vldbEntry.flags |= VLF_RWEXISTS;
199 vldbEntry.volumeId[0] = AFS_FAKE_ROOT_VOL_ID;
205 while (volp->flags & CM_VOLUMEFLAG_UPDATING_VL) {
206 osi_SleepW((LONG_PTR) &volp->flags, &volp->rw);
207 lock_ObtainWrite(&volp->rw);
209 if (!(volp->flags & CM_VOLUMEFLAG_RESET))
213 volp->flags |= CM_VOLUMEFLAG_UPDATING_VL;
214 lock_ReleaseWrite(&volp->rw);
216 if (cellp->flags & CM_CELLFLAG_VLSERVER_INVALID)
217 cm_UpdateCell(cellp, 0);
219 /* now we have volume structure locked and held; make RPC to fill it */
220 osi_Log2(afsd_logp, "CALL VL_GetEntryByName{UNO} name %s:%s", volp->cellp->name, volp->namep);
222 code = cm_ConnByMServers(cellp->vlServersp, userp, reqp, &connp);
226 code = VL_GetEntryByNameU(connp->callp, volp->namep, &uvldbEntry);
228 if ( code == RXGEN_OPCODE )
231 code = VL_GetEntryByNameN(connp->callp, volp->namep, &nvldbEntry);
234 if ( code == RXGEN_OPCODE ) {
235 code = VL_GetEntryByNameO(connp->callp, volp->namep, &vldbEntry);
238 } while (cm_Analyze(connp, userp, reqp, NULL, NULL, cellp->vlServersp, NULL, code));
239 code = cm_MapVLRPCError(code, reqp);
241 osi_Log3(afsd_logp, "CALL VL_GetEntryByName{UNO} name %s:%s FAILURE, code 0x%x",
242 volp->cellp->name, volp->namep, code);
244 osi_Log2(afsd_logp, "CALL VL_GetEntryByName{UNO} name %s:%s SUCCESS",
245 volp->cellp->name, volp->namep);
248 /* We can end up here with code == CM_ERROR_NOSUCHVOLUME if the base volume name
249 * does not exist but there might exist a .readonly volume. If the base name
250 * doesn't exist we will not care about the .backup that might be left behind
251 * since there should be no method to access it.
253 if (code == CM_ERROR_NOSUCHVOLUME && volp->vol[RWVOL].ID == 0 && strlen(volp->namep) < (VL_MAXNAMELEN - 9)) {
254 char name[VL_MAXNAMELEN];
256 snprintf(name, VL_MAXNAMELEN, "%s.readonly", volp->namep);
258 /* now we have volume structure locked and held; make RPC to fill it */
259 osi_Log2(afsd_logp, "CALL VL_GetEntryByName{UNO} name %s:%s", volp->cellp->name,
260 osi_LogSaveString(afsd_logp,name));
262 code = cm_ConnByMServers(cellp->vlServersp, userp, reqp, &connp);
266 code = VL_GetEntryByNameU(connp->callp, name, &uvldbEntry);
268 if ( code == RXGEN_OPCODE )
271 code = VL_GetEntryByNameN(connp->callp, name, &nvldbEntry);
274 if ( code == RXGEN_OPCODE ) {
275 code = VL_GetEntryByNameO(connp->callp, name, &vldbEntry);
278 } while (cm_Analyze(connp, userp, reqp, NULL, NULL, cellp->vlServersp, NULL, code));
279 code = cm_MapVLRPCError(code, reqp);
281 osi_Log3(afsd_logp, "CALL VL_GetEntryByName{UNO} name %s:%s FAILURE, code 0x%x",
282 volp->cellp->name, osi_LogSaveString(afsd_logp,name), code);
284 osi_Log2(afsd_logp, "CALL VL_GetEntryByName{UNO} name %s:%s SUCCESS",
285 volp->cellp->name, osi_LogSaveString(afsd_logp,name));
288 lock_ObtainWrite(&volp->rw);
295 afs_int32 serverNumber[NMAXNSERVERS];
296 afs_int32 serverFlags[NMAXNSERVERS];
297 afs_int32 rwServers_alldown = 1;
298 afs_int32 roServers_alldown = 1;
299 afs_int32 bkServers_alldown = 1;
300 char name[VL_MAXNAMELEN];
302 #ifdef AFS_FREELANCE_CLIENT
304 rwServers_alldown = 0;
309 flags = vldbEntry.flags;
310 nServers = vldbEntry.nServers;
311 rwID = vldbEntry.volumeId[0];
312 roID = vldbEntry.volumeId[1];
313 bkID = vldbEntry.volumeId[2];
314 for ( i=0; i<nServers; i++ ) {
315 serverFlags[i] = vldbEntry.serverFlags[i];
316 serverNumber[i] = vldbEntry.serverNumber[i];
318 strncpy(name, vldbEntry.name, VL_MAXNAMELEN);
319 name[VL_MAXNAMELEN - 1] = '\0';
322 flags = nvldbEntry.flags;
323 nServers = nvldbEntry.nServers;
324 rwID = nvldbEntry.volumeId[0];
325 roID = nvldbEntry.volumeId[1];
326 bkID = nvldbEntry.volumeId[2];
327 for ( i=0; i<nServers; i++ ) {
328 serverFlags[i] = nvldbEntry.serverFlags[i];
329 serverNumber[i] = nvldbEntry.serverNumber[i];
331 strncpy(name, nvldbEntry.name, VL_MAXNAMELEN);
332 name[VL_MAXNAMELEN - 1] = '\0';
336 flags = uvldbEntry.flags;
337 nServers = uvldbEntry.nServers;
338 rwID = uvldbEntry.volumeId[0];
339 roID = uvldbEntry.volumeId[1];
340 bkID = uvldbEntry.volumeId[2];
341 for ( i=0, j=0; i<nServers && j<NMAXNSERVERS; i++ ) {
342 if ( !(uvldbEntry.serverFlags[i] & VLSERVER_FLAG_UUID) ) {
343 serverFlags[j] = uvldbEntry.serverFlags[i];
344 serverNumber[j] = uvldbEntry.serverNumber[i].time_low;
347 afs_uint32 * addrp, nentries, code, unique;
349 ListAddrByAttributes attrs;
352 memset((char *)&attrs, 0, sizeof(attrs));
353 attrs.Mask = VLADDR_UUID;
354 attrs.uuid = uvldbEntry.serverNumber[i];
355 memset((char *)&uuid, 0, sizeof(uuid));
356 memset((char *)&addrs, 0, sizeof(addrs));
359 code = cm_ConnByMServers(cellp->vlServersp, userp, reqp, &connp);
363 code = VL_GetAddrsU(connp->callp, &attrs, &uuid, &unique, &nentries, &addrs);
365 if (code == 0 && nentries == 0)
367 } while (cm_Analyze(connp, userp, reqp, NULL, NULL, cellp->vlServersp, NULL, code));
368 code = cm_MapVLRPCError(code, reqp);
372 addrp = addrs.bulkaddrs_val;
373 for (k = 0; k < nentries && j < NMAXNSERVERS; j++, k++) {
374 serverFlags[j] = uvldbEntry.serverFlags[i];
375 serverNumber[j] = addrp[k];
378 free(addrs.bulkaddrs_val); /* This is wrong */
381 nServers = j; /* update the server count */
382 strncpy(name, uvldbEntry.name, VL_MAXNAMELEN);
383 name[VL_MAXNAMELEN - 1] = '\0';
388 /* decode the response */
389 lock_ObtainWrite(&cm_volumeLock);
390 if (cm_VolNameIsID(volp->namep)) {
395 if (len >= 8 && strcmp(name + len - 7, ".backup") == 0) {
396 name[len - 7] = '\0';
397 } else if (len >= 10 && strcmp(name + len - 9, ".readonly") == 0) {
398 name[len - 9] = '\0';
401 osi_Log2(afsd_logp, "cm_UpdateVolume name %s -> %s", volp->namep, name);
403 if (volp->flags & CM_VOLUMEFLAG_IN_HASH)
404 cm_RemoveVolumeFromNameHashTable(volp);
406 strcpy(volp->namep, name);
408 cm_AddVolumeToNameHashTable(volp);
411 if (flags & VLF_RWEXISTS) {
412 if (volp->vol[RWVOL].ID != rwID) {
413 if (volp->vol[RWVOL].flags & CM_VOLUMEFLAG_IN_HASH)
414 cm_RemoveVolumeFromIDHashTable(volp, RWVOL);
415 volp->vol[RWVOL].ID = rwID;
416 cm_AddVolumeToIDHashTable(volp, RWVOL);
419 if (volp->vol[RWVOL].flags & CM_VOLUMEFLAG_IN_HASH)
420 cm_RemoveVolumeFromIDHashTable(volp, RWVOL);
421 volp->vol[RWVOL].ID = 0;
423 if (flags & VLF_ROEXISTS) {
424 if (volp->vol[ROVOL].ID != roID) {
425 if (volp->vol[ROVOL].flags & CM_VOLUMEFLAG_IN_HASH)
426 cm_RemoveVolumeFromIDHashTable(volp, ROVOL);
427 volp->vol[ROVOL].ID = roID;
428 cm_AddVolumeToIDHashTable(volp, ROVOL);
431 if (volp->vol[ROVOL].flags & CM_VOLUMEFLAG_IN_HASH)
432 cm_RemoveVolumeFromIDHashTable(volp, ROVOL);
433 volp->vol[ROVOL].ID = 0;
435 if (flags & VLF_BACKEXISTS) {
436 if (volp->vol[BACKVOL].ID != bkID) {
437 if (volp->vol[BACKVOL].flags & CM_VOLUMEFLAG_IN_HASH)
438 cm_RemoveVolumeFromIDHashTable(volp, BACKVOL);
439 volp->vol[BACKVOL].ID = bkID;
440 cm_AddVolumeToIDHashTable(volp, BACKVOL);
443 if (volp->vol[BACKVOL].flags & CM_VOLUMEFLAG_IN_HASH)
444 cm_RemoveVolumeFromIDHashTable(volp, BACKVOL);
445 volp->vol[BACKVOL].ID = 0;
447 lock_ReleaseWrite(&cm_volumeLock);
448 for (i=0; i<nServers; i++) {
449 /* create a server entry */
450 tflags = serverFlags[i];
451 if (tflags & VLSF_DONTUSE)
453 tsockAddr.sin_family = AF_INET;
454 tempAddr = htonl(serverNumber[i]);
455 tsockAddr.sin_addr.s_addr = tempAddr;
456 tsp = cm_FindServer(&tsockAddr, CM_SERVER_FILE);
458 tsp = cm_NewServer(&tsockAddr, CM_SERVER_FILE,
461 /* if this server was created by fs setserverprefs */
465 osi_assertx(tsp != NULL, "null cm_server_t");
467 /* and add it to the list(s). */
469 * Each call to cm_NewServerRef() increments the
470 * ref count of tsp. These reference will be dropped,
471 * if and when the volume is reset; see reset code
472 * earlier in this function.
474 if ((tflags & VLSF_RWVOL) && (flags & VLF_RWEXISTS)) {
475 tsrp = cm_NewServerRef(tsp, rwID);
476 cm_InsertServerList(&volp->vol[RWVOL].serversp, tsrp);
478 lock_ObtainWrite(&cm_serverLock);
479 tsrp->refCount--; /* drop allocation reference */
480 lock_ReleaseWrite(&cm_serverLock);
482 if (!(tsp->flags & CM_SERVERFLAG_DOWN))
483 rwServers_alldown = 0;
485 if ((tflags & VLSF_ROVOL) && (flags & VLF_ROEXISTS)) {
486 tsrp = cm_NewServerRef(tsp, roID);
487 cm_InsertServerList(&volp->vol[ROVOL].serversp, tsrp);
488 lock_ObtainWrite(&cm_serverLock);
489 tsrp->refCount--; /* drop allocation reference */
490 lock_ReleaseWrite(&cm_serverLock);
493 if (!(tsp->flags & CM_SERVERFLAG_DOWN))
494 roServers_alldown = 0;
496 /* We don't use VLSF_BACKVOL !?! */
497 /* Because only the backup on the server holding the RW
498 * volume can be valid. This check prevents errors if a
499 * RW is moved but the old backup is not removed.
501 if ((tflags & VLSF_RWVOL) && (flags & VLF_BACKEXISTS)) {
502 tsrp = cm_NewServerRef(tsp, bkID);
503 cm_InsertServerList(&volp->vol[BACKVOL].serversp, tsrp);
504 lock_ObtainWrite(&cm_serverLock);
505 tsrp->refCount--; /* drop allocation reference */
506 lock_ReleaseWrite(&cm_serverLock);
508 if (!(tsp->flags & CM_SERVERFLAG_DOWN))
509 bkServers_alldown = 0;
511 /* Drop the reference obtained by cm_FindServer() */
518 * If the first n servers have the same ipRank, then we
519 * randomly pick one among them and move it to the beginning.
520 * We don't bother to re-order the whole list because
521 * the rest of the list is used only if the first server is
522 * down. We only do this for the RO list; we assume the other
523 * lists are length 1.
526 cm_RandomizeServer(&volp->vol[ROVOL].serversp);
529 rwNewstate = rwServers_alldown ? vl_alldown : vl_online;
530 roNewstate = roServers_alldown ? vl_alldown : vl_online;
531 bkNewstate = bkServers_alldown ? vl_alldown : vl_online;
532 } else if (code == CM_ERROR_NOSUCHVOLUME || code == VL_NOENT) {
533 /* this volume does not exist - we should discard it */
534 if (volp->flags & CM_VOLUMEFLAG_IN_HASH)
535 cm_RemoveVolumeFromNameHashTable(volp);
536 for ( volType = RWVOL; volType < NUM_VOL_TYPES; volType++) {
537 if (volp->vol[volType].flags & CM_VOLUMEFLAG_IN_HASH)
538 cm_RemoveVolumeFromIDHashTable(volp, volType);
539 if (volp->vol[volType].ID) {
540 cm_VolumeStatusNotification(volp, volp->vol[volType].ID, volp->vol[volType].state, vl_alldown);
541 volp->vol[volType].ID = 0;
543 cm_SetFid(&volp->vol[volType].dotdotFid, 0, 0, 0, 0);
546 /* Move to the end so it will be recycled first */
547 cm_MoveVolumeToLRULast(volp);
549 volp->namep[0] ='\0';
551 rwNewstate = roNewstate = bkNewstate = vl_alldown;
554 if (volp->vol[RWVOL].state != rwNewstate) {
555 if (volp->vol[RWVOL].ID)
556 cm_VolumeStatusNotification(volp, volp->vol[RWVOL].ID, volp->vol[RWVOL].state, rwNewstate);
557 volp->vol[RWVOL].state = rwNewstate;
559 if (volp->vol[ROVOL].state != roNewstate) {
560 if (volp->vol[ROVOL].ID)
561 cm_VolumeStatusNotification(volp, volp->vol[ROVOL].ID, volp->vol[ROVOL].state, roNewstate);
562 volp->vol[ROVOL].state = roNewstate;
564 if (volp->vol[BACKVOL].state != bkNewstate) {
565 if (volp->vol[BACKVOL].ID)
566 cm_VolumeStatusNotification(volp, volp->vol[BACKVOL].ID, volp->vol[BACKVOL].state, bkNewstate);
567 volp->vol[BACKVOL].state = bkNewstate;
570 volp->flags &= ~CM_VOLUMEFLAG_UPDATING_VL;
571 osi_Wakeup((LONG_PTR) &volp->flags);
576 /* Requires read or write lock on cm_volumeLock */
577 void cm_GetVolume(cm_volume_t *volp)
579 InterlockedIncrement(&volp->refCount);
582 cm_volume_t *cm_GetVolumeByFID(cm_fid_t *fidp)
587 lock_ObtainRead(&cm_volumeLock);
588 hash = CM_VOLUME_ID_HASH(fidp->volume);
589 /* The volumeID can be any one of the three types. So we must
590 * search the hash table for all three types until we find it.
591 * We will search in the order of RO, RW, BK.
593 for ( volp = cm_data.volumeROIDHashTablep[hash]; volp; volp = volp->vol[ROVOL].nextp) {
594 if ( fidp->cell == volp->cellp->cellID && fidp->volume == volp->vol[ROVOL].ID )
599 for ( volp = cm_data.volumeRWIDHashTablep[hash]; volp; volp = volp->vol[RWVOL].nextp) {
600 if ( fidp->cell == volp->cellp->cellID && fidp->volume == volp->vol[RWVOL].ID )
606 for ( volp = cm_data.volumeBKIDHashTablep[hash]; volp; volp = volp->vol[BACKVOL].nextp) {
607 if ( fidp->cell == volp->cellp->cellID && fidp->volume == volp->vol[BACKVOL].ID )
612 /* hold the volume if we found it */
616 lock_ReleaseRead(&cm_volumeLock);
620 long cm_FindVolumeByID(cm_cell_t *cellp, afs_uint32 volumeID, cm_user_t *userp,
621 cm_req_t *reqp, afs_uint32 flags, cm_volume_t **outVolpp)
624 #ifdef SEARCH_ALL_VOLUMES
627 char volNameString[VL_MAXNAMELEN];
631 lock_ObtainRead(&cm_volumeLock);
632 #ifdef SEARCH_ALL_VOLUMES
633 for(volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
634 if (cellp == volp->cellp &&
635 ((unsigned) volumeID == volp->vol[RWVOL].ID ||
636 (unsigned) volumeID == volp->vol[ROVOL].ID ||
637 (unsigned) volumeID == volp->vol[BACKVOL].ID))
642 #endif /* SEARCH_ALL_VOLUMES */
644 hash = CM_VOLUME_ID_HASH(volumeID);
645 /* The volumeID can be any one of the three types. So we must
646 * search the hash table for all three types until we find it.
647 * We will search in the order of RO, RW, BK.
649 for ( volp = cm_data.volumeROIDHashTablep[hash]; volp; volp = volp->vol[ROVOL].nextp) {
650 if ( cellp == volp->cellp && volumeID == volp->vol[ROVOL].ID )
655 for ( volp = cm_data.volumeRWIDHashTablep[hash]; volp; volp = volp->vol[RWVOL].nextp) {
656 if ( cellp == volp->cellp && volumeID == volp->vol[RWVOL].ID )
662 for ( volp = cm_data.volumeBKIDHashTablep[hash]; volp; volp = volp->vol[BACKVOL].nextp) {
663 if ( cellp == volp->cellp && volumeID == volp->vol[BACKVOL].ID )
668 #ifdef SEARCH_ALL_VOLUMES
669 osi_assertx(volp == volp2, "unexpected cm_vol_t");
672 /* hold the volume if we found it */
676 lock_ReleaseRead(&cm_volumeLock);
680 lock_ObtainWrite(&volp->rw);
683 if ((volp->flags & CM_VOLUMEFLAG_RESET) && !(flags & CM_GETVOL_FLAG_NO_RESET)) {
684 code = cm_UpdateVolumeLocation(cellp, userp, reqp, volp);
686 volp->flags &= ~CM_VOLUMEFLAG_RESET;
688 lock_ReleaseWrite(&volp->rw);
692 if (!(flags & CM_GETVOL_FLAG_NO_LRU_UPDATE)) {
693 lock_ObtainWrite(&cm_volumeLock);
694 cm_AdjustVolumeLRU(volp);
695 lock_ReleaseWrite(&cm_volumeLock);
703 /* otherwise, we didn't find it so consult the VLDB */
704 sprintf(volNameString, "%u", volumeID);
705 code = cm_FindVolumeByName(cellp, volNameString, userp, reqp,
711 long cm_FindVolumeByName(struct cm_cell *cellp, char *volumeNamep,
712 struct cm_user *userp, struct cm_req *reqp,
713 afs_uint32 flags, cm_volume_t **outVolpp)
716 #ifdef SEARCH_ALL_VOLUMES
720 char name[VL_MAXNAMELEN];
725 strncpy(name, volumeNamep, VL_MAXNAMELEN);
726 name[VL_MAXNAMELEN-1] = '\0';
729 if (len >= 8 && strcmp(name + len - 7, ".backup") == 0) {
731 name[len - 7] = '\0';
732 } else if (len >= 10 && strcmp(name + len - 9, ".readonly") == 0) {
734 name[len - 9] = '\0';
739 lock_ObtainRead(&cm_volumeLock);
740 #ifdef SEARCH_ALL_VOLUMES
741 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
742 if (cellp == volp->cellp && strcmp(name, volp->namep) == 0) {
747 #endif /* SEARCH_ALL_VOLUMES */
749 hash = CM_VOLUME_NAME_HASH(name);
750 for (volp = cm_data.volumeNameHashTablep[hash]; volp; volp = volp->nameNextp) {
751 if (cellp == volp->cellp && strcmp(name, volp->namep) == 0)
755 #ifdef SEARCH_ALL_VOLUMES
756 osi_assertx(volp2 == volp, "unexpected cm_vol_t");
759 if (!volp && (flags & CM_GETVOL_FLAG_CREATE)) {
761 /* otherwise, get from VLDB */
763 if ( cm_data.currentVolumes >= cm_data.maxVolumes ) {
764 #ifdef RECYCLE_FROM_ALL_VOLUMES_LIST
765 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
766 if ( volp->refCount == 0 ) {
767 /* There is one we can re-use */
772 for ( volp = cm_data.volumeLRULastp;
774 volp = (cm_volume_t *) osi_QPrev(&volp->q))
776 if ( volp->refCount == 0 ) {
777 /* There is one we can re-use */
783 osi_panic("Exceeded Max Volumes", __FILE__, __LINE__);
785 lock_ReleaseRead(&cm_volumeLock);
786 lock_ObtainWrite(&volp->rw);
787 lock_ObtainWrite(&cm_volumeLock);
789 osi_Log2(afsd_logp, "Recycling Volume %s:%s",
790 volp->cellp->name, volp->namep);
792 if (volp->flags & CM_VOLUMEFLAG_IN_LRU_QUEUE)
793 cm_RemoveVolumeFromLRU(volp);
794 if (volp->flags & CM_VOLUMEFLAG_IN_HASH)
795 cm_RemoveVolumeFromNameHashTable(volp);
797 for ( volType = RWVOL; volType < NUM_VOL_TYPES; volType++) {
798 if (volp->vol[volType].flags & CM_VOLUMEFLAG_IN_HASH)
799 cm_RemoveVolumeFromIDHashTable(volp, volType);
800 if (volp->vol[volType].ID)
801 cm_VolumeStatusNotification(volp, volp->vol[volType].ID, volp->vol[volType].state, vl_unknown);
802 volp->vol[volType].ID = 0;
803 cm_SetFid(&volp->vol[volType].dotdotFid, 0, 0, 0, 0);
806 volp = &cm_data.volumeBaseAddress[cm_data.currentVolumes++];
807 memset(volp, 0, sizeof(cm_volume_t));
808 volp->magic = CM_VOLUME_MAGIC;
809 volp->allNextp = cm_data.allVolumesp;
810 cm_data.allVolumesp = volp;
811 lock_InitializeRWLock(&volp->rw, "cm_volume_t rwlock");
812 lock_ReleaseRead(&cm_volumeLock);
813 lock_ObtainWrite(&volp->rw);
814 lock_ObtainWrite(&cm_volumeLock);
817 strncpy(volp->namep, name, VL_MAXNAMELEN);
818 volp->namep[VL_MAXNAMELEN-1] = '\0';
819 volp->refCount = 1; /* starts off held */
820 volp->flags = CM_VOLUMEFLAG_RESET;
822 for ( volType = RWVOL; volType < NUM_VOL_TYPES; volType++) {
823 volp->vol[volType].state = vl_unknown;
824 volp->vol[volType].nextp = NULL;
825 volp->vol[volType].flags = 0;
827 volp->cbExpiresRO = 0;
828 cm_AddVolumeToNameHashTable(volp);
829 lock_ReleaseWrite(&cm_volumeLock);
834 lock_ReleaseRead(&cm_volumeLock);
837 return CM_ERROR_NOSUCHVOLUME;
839 lock_ObtainWrite(&volp->rw);
842 /* if we get here we are holding the mutex */
843 if ((volp->flags & CM_VOLUMEFLAG_RESET) && !(flags & CM_GETVOL_FLAG_NO_RESET)) {
844 code = cm_UpdateVolumeLocation(cellp, userp, reqp, volp);
846 volp->flags &= ~CM_VOLUMEFLAG_RESET;
848 lock_ReleaseWrite(&volp->rw);
850 if (code == 0 && (type == BACKVOL && volp->vol[BACKVOL].ID == 0 ||
851 type == ROVOL && volp->vol[ROVOL].ID == 0))
852 code = CM_ERROR_NOSUCHVOLUME;
857 if (!(flags & CM_GETVOL_FLAG_NO_LRU_UPDATE)) {
858 lock_ObtainWrite(&cm_volumeLock);
859 cm_AdjustVolumeLRU(volp);
860 lock_ReleaseWrite(&cm_volumeLock);
868 void cm_ForceUpdateVolume(cm_fid_t *fidp, cm_user_t *userp, cm_req_t *reqp)
872 #ifdef SEARCH_ALL_VOLUMES
879 cellp = cm_FindCellByID(fidp->cell, 0);
882 /* search for the volume */
883 lock_ObtainRead(&cm_volumeLock);
884 #ifdef SEARCH_ALL_VOLUMES
885 for(volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
886 if (cellp == volp->cellp &&
887 (fidp->volume == volp->vol[RWVOL].ID ||
888 fidp->volume == volp->vol[ROVOL].ID ||
889 fidp->volume == volp->vol[BACKVOL].ID))
892 #endif /* SEARCH_ALL_VOLUMES */
894 hash = CM_VOLUME_ID_HASH(fidp->volume);
895 /* The volumeID can be any one of the three types. So we must
896 * search the hash table for all three types until we find it.
897 * We will search in the order of RO, RW, BK.
899 for ( volp = cm_data.volumeROIDHashTablep[hash]; volp; volp = volp->vol[ROVOL].nextp) {
900 if ( cellp == volp->cellp && fidp->volume == volp->vol[ROVOL].ID )
905 for ( volp = cm_data.volumeRWIDHashTablep[hash]; volp; volp = volp->vol[RWVOL].nextp) {
906 if ( cellp == volp->cellp && fidp->volume == volp->vol[RWVOL].ID )
912 for ( volp = cm_data.volumeBKIDHashTablep[hash]; volp; volp = volp->vol[BACKVOL].nextp) {
913 if ( cellp == volp->cellp && fidp->volume == volp->vol[BACKVOL].ID )
918 #ifdef SEARCH_ALL_VOLUMES
919 osi_assertx(volp == volp2, "unexpected cm_vol_t");
921 /* hold the volume if we found it */
925 lock_ReleaseRead(&cm_volumeLock);
928 cm_data.mountRootGen = time(NULL);
929 lock_ObtainWrite(&volp->rw);
930 volp->flags |= CM_VOLUMEFLAG_RESET;
932 /* Mark the volume to be updated but don't update it now.
933 * This function is called only from within cm_Analyze
934 * when cm_ConnByMServers has failed with all servers down
935 * The problem is that cm_UpdateVolume is going to call
936 * cm_ConnByMServers which may cause a recursive chain
937 * of calls each returning a retry on failure.
938 * Instead, set the flag so the next time the volume is
939 * accessed by Name or ID the UpdateVolume call will
942 code = cm_UpdateVolumeLocation(cellp, userp, reqp, volp);
944 volp->flags &= ~CM_VOLUMEFLAG_RESET;
946 lock_ReleaseWrite(&volp->rw);
951 /* find the appropriate servers from a volume */
952 cm_serverRef_t **cm_GetVolServers(cm_volume_t *volp, afs_uint32 volume)
954 cm_serverRef_t **serverspp;
955 cm_serverRef_t *current;;
957 lock_ObtainWrite(&cm_serverLock);
959 if (volume == volp->vol[RWVOL].ID)
960 serverspp = &volp->vol[RWVOL].serversp;
961 else if (volume == volp->vol[ROVOL].ID)
962 serverspp = &volp->vol[ROVOL].serversp;
963 else if (volume == volp->vol[BACKVOL].ID)
964 serverspp = &volp->vol[BACKVOL].serversp;
966 osi_panic("bad volume ID in cm_GetVolServers", __FILE__, __LINE__);
968 for (current = *serverspp; current; current = current->next)
971 lock_ReleaseWrite(&cm_serverLock);
976 void cm_PutVolume(cm_volume_t *volp)
978 afs_int32 refCount = InterlockedDecrement(&volp->refCount);
979 osi_assertx(refCount >= 0, "cm_volume_t refCount underflow has occurred");
982 /* return the read-only volume, if there is one, or the read-write volume if
985 long cm_GetROVolumeID(cm_volume_t *volp)
989 lock_ObtainRead(&volp->rw);
990 if (volp->vol[ROVOL].ID && volp->vol[ROVOL].serversp)
991 id = volp->vol[ROVOL].ID;
993 id = volp->vol[RWVOL].ID;
994 lock_ReleaseRead(&volp->rw);
999 void cm_RefreshVolumes(void)
1005 cm_data.mountRootGen = time(NULL);
1007 /* force a re-loading of volume data from the vldb */
1008 lock_ObtainRead(&cm_volumeLock);
1009 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
1010 InterlockedIncrement(&volp->refCount);
1011 lock_ReleaseRead(&cm_volumeLock);
1013 lock_ObtainWrite(&volp->rw);
1014 volp->flags |= CM_VOLUMEFLAG_RESET;
1015 lock_ReleaseWrite(&volp->rw);
1017 lock_ObtainRead(&cm_volumeLock);
1018 refCount = InterlockedDecrement(&volp->refCount);
1019 osi_assertx(refCount >= 0, "cm_volume_t refCount underflow");
1021 lock_ReleaseRead(&cm_volumeLock);
1023 /* force mount points to be re-evaluated so that
1024 * if the volume location has changed we will pick
1027 for ( scp = cm_data.scacheLRUFirstp;
1029 scp = (cm_scache_t *) osi_QNext(&scp->q)) {
1030 if ( scp->fileType == CM_SCACHETYPE_MOUNTPOINT
1031 #ifdef AFS_FREELANCE_CLIENT
1032 && !(scp->fid.cell == AFS_FAKE_ROOT_CELL_ID && scp->fid.volume == AFS_FAKE_ROOT_VOL_ID)
1035 lock_ObtainWrite(&scp->rw);
1036 scp->mountPointStringp[0] = '\0';
1037 lock_ReleaseWrite(&scp->rw);
1044 /* The return code is 0 if the volume is not online and
1045 * 1 if the volume is online
1048 cm_CheckOfflineVolume(cm_volume_t *volp, afs_uint32 volID)
1052 AFSFetchVolumeStatus volStat;
1057 struct rx_connection * callp;
1059 char offLineMsg[256];
1062 cm_serverRef_t *serversp;
1065 OfflineMsg = offLineMsg;
1068 lock_ObtainWrite(&volp->rw);
1070 if (volp->flags & CM_VOLUMEFLAG_RESET) {
1072 code = cm_UpdateVolumeLocation(volp->cellp, cm_rootUserp, &req, volp);
1074 volp->flags &= ~CM_VOLUMEFLAG_RESET;
1077 if (volp->vol[RWVOL].ID != 0 && (!volID || volID == volp->vol[RWVOL].ID) &&
1078 volp->vol[RWVOL].serversp &&
1079 (volp->vol[RWVOL].state == vl_busy || volp->vol[RWVOL].state == vl_offline || volp->vol[RWVOL].state == vl_unknown)) {
1082 for (serversp = volp->vol[RWVOL].serversp; serversp; serversp = serversp->next) {
1083 if (serversp->status == srv_busy || serversp->status == srv_offline)
1084 serversp->status = srv_not_busy;
1087 lock_ReleaseWrite(&volp->rw);
1089 code = cm_ConnFromVolume(volp, volp->vol[RWVOL].ID, cm_rootUserp, &req, &connp);
1093 callp = cm_GetRxConn(connp);
1094 code = RXAFS_GetVolumeStatus(callp, volp->vol[RWVOL].ID,
1095 &volStat, &Name, &OfflineMsg, &MOTD);
1096 rx_PutConnection(callp);
1098 } while (cm_Analyze(connp, cm_rootUserp, &req, NULL, NULL, NULL, NULL, code));
1099 code = cm_MapRPCError(code, &req);
1101 lock_ObtainWrite(&volp->rw);
1102 if (code == 0 && volStat.Online) {
1103 cm_VolumeStatusNotification(volp, volp->vol[RWVOL].ID, volp->vol[RWVOL].state, vl_online);
1104 volp->vol[RWVOL].state = vl_online;
1106 } else if (code == CM_ERROR_NOACCESS) {
1107 cm_VolumeStatusNotification(volp, volp->vol[RWVOL].ID, volp->vol[RWVOL].state, vl_unknown);
1108 volp->vol[RWVOL].state = vl_unknown;
1113 if (volp->vol[ROVOL].ID != 0 && (!volID || volID == volp->vol[ROVOL].ID) &&
1114 volp->vol[ROVOL].serversp &&
1115 (volp->vol[ROVOL].state == vl_busy || volp->vol[ROVOL].state == vl_offline || volp->vol[ROVOL].state == vl_unknown)) {
1118 for (serversp = volp->vol[ROVOL].serversp; serversp; serversp = serversp->next) {
1119 if (serversp->status == srv_busy || serversp->status == srv_offline)
1120 serversp->status = srv_not_busy;
1123 lock_ReleaseWrite(&volp->rw);
1125 code = cm_ConnFromVolume(volp, volp->vol[ROVOL].ID, cm_rootUserp, &req, &connp);
1129 callp = cm_GetRxConn(connp);
1130 code = RXAFS_GetVolumeStatus(callp, volp->vol[ROVOL].ID,
1131 &volStat, &Name, &OfflineMsg, &MOTD);
1132 rx_PutConnection(callp);
1134 } while (cm_Analyze(connp, cm_rootUserp, &req, NULL, NULL, NULL, NULL, code));
1135 code = cm_MapRPCError(code, &req);
1137 lock_ObtainWrite(&volp->rw);
1138 if (code == 0 && volStat.Online) {
1139 cm_VolumeStatusNotification(volp, volp->vol[ROVOL].ID, volp->vol[ROVOL].state, vl_online);
1140 volp->vol[ROVOL].state = vl_online;
1142 } else if (code == CM_ERROR_NOACCESS) {
1143 cm_VolumeStatusNotification(volp, volp->vol[ROVOL].ID, volp->vol[ROVOL].state, vl_unknown);
1144 volp->vol[ROVOL].state = vl_unknown;
1149 if (volp->vol[BACKVOL].ID != 0 && (!volID || volID == volp->vol[BACKVOL].ID) &&
1150 volp->vol[BACKVOL].serversp &&
1151 (volp->vol[BACKVOL].state == vl_busy || volp->vol[BACKVOL].state == vl_offline || volp->vol[BACKVOL].state == vl_unknown)) {
1154 for (serversp = volp->vol[BACKVOL].serversp; serversp; serversp = serversp->next) {
1155 if (serversp->status == srv_busy || serversp->status == srv_offline)
1156 serversp->status = srv_not_busy;
1159 lock_ReleaseWrite(&volp->rw);
1161 code = cm_ConnFromVolume(volp, volp->vol[BACKVOL].ID, cm_rootUserp, &req, &connp);
1165 callp = cm_GetRxConn(connp);
1166 code = RXAFS_GetVolumeStatus(callp, volp->vol[BACKVOL].ID,
1167 &volStat, &Name, &OfflineMsg, &MOTD);
1168 rx_PutConnection(callp);
1170 } while (cm_Analyze(connp, cm_rootUserp, &req, NULL, NULL, NULL, NULL, code));
1171 code = cm_MapRPCError(code, &req);
1173 lock_ObtainWrite(&volp->rw);
1174 if (code == 0 && volStat.Online) {
1175 cm_VolumeStatusNotification(volp, volp->vol[BACKVOL].ID, volp->vol[BACKVOL].state, vl_online);
1176 volp->vol[BACKVOL].state = vl_online;
1178 } else if (code == CM_ERROR_NOACCESS) {
1179 cm_VolumeStatusNotification(volp, volp->vol[BACKVOL].ID, volp->vol[BACKVOL].state, vl_unknown);
1180 volp->vol[BACKVOL].state = vl_unknown;
1185 lock_ReleaseWrite(&volp->rw);
1190 /* called from the Daemon thread */
1191 void cm_CheckOfflineVolumes(void)
1196 lock_ObtainRead(&cm_volumeLock);
1197 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
1198 if (volp->flags & CM_VOLUMEFLAG_IN_HASH) {
1199 InterlockedIncrement(&volp->refCount);
1200 lock_ReleaseRead(&cm_volumeLock);
1201 cm_CheckOfflineVolume(volp, 0);
1202 lock_ObtainRead(&cm_volumeLock);
1203 refCount = InterlockedDecrement(&volp->refCount);
1204 osi_assertx(refCount >= 0, "cm_volume_t refCount underflow");
1207 lock_ReleaseRead(&cm_volumeLock);
1212 cm_UpdateVolumeStatusInt(cm_volume_t *volp, struct cm_vol_state *statep)
1214 enum volstatus newStatus;
1215 cm_serverRef_t *tsrp;
1217 int someBusy = 0, someOffline = 0, allOffline = 1, allBusy = 1, allDown = 1;
1219 if (!volp || !statep) {
1226 lock_ObtainWrite(&cm_serverLock);
1227 for (tsrp = statep->serversp; tsrp; tsrp=tsrp->next) {
1229 cm_GetServerNoLock(tsp);
1230 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
1232 if (tsrp->status == srv_busy) {
1235 } else if (tsrp->status == srv_offline) {
1243 cm_PutServerNoLock(tsp);
1245 lock_ReleaseWrite(&cm_serverLock);
1248 newStatus = vl_alldown;
1249 else if (allBusy || (someBusy && someOffline))
1250 newStatus = vl_busy;
1251 else if (allOffline)
1252 newStatus = vl_offline;
1254 newStatus = vl_online;
1256 if (statep->ID && statep->state != newStatus)
1257 cm_VolumeStatusNotification(volp, statep->ID, statep->state, newStatus);
1259 statep->state = newStatus;
1263 cm_UpdateVolumeStatus(cm_volume_t *volp, afs_uint32 volID)
1266 if (volp->vol[RWVOL].ID == volID) {
1267 cm_UpdateVolumeStatusInt(volp, &volp->vol[RWVOL]);
1268 } else if (volp->vol[ROVOL].ID == volID) {
1269 cm_UpdateVolumeStatusInt(volp, &volp->vol[ROVOL]);
1270 } else if (volp->vol[BACKVOL].ID == volID) {
1271 cm_UpdateVolumeStatusInt(volp, &volp->vol[BACKVOL]);
1274 * If we are called with volID == 0 then something has gone wrong.
1275 * Most likely a race occurred in the server volume list maintenance.
1276 * Since we don't know which volume's status should be updated,
1277 * just update all of them that are known to exist. Better to be
1278 * correct than fast.
1281 for ( volType = RWVOL; volType < NUM_VOL_TYPES; volType++) {
1282 if (volp->vol[volType].ID != 0)
1283 cm_UpdateVolumeStatusInt(volp, &volp->vol[volType]);
1289 ** Finds all volumes that reside on this server and reorders their
1290 ** RO list according to the changed rank of server.
1292 void cm_ChangeRankVolume(cm_server_t *tsp)
1298 /* find volumes which might have RO copy on server*/
1299 lock_ObtainRead(&cm_volumeLock);
1300 for(volp = cm_data.allVolumesp; volp; volp=volp->allNextp)
1302 code = 1 ; /* assume that list is unchanged */
1303 InterlockedIncrement(&volp->refCount);
1304 lock_ReleaseRead(&cm_volumeLock);
1305 lock_ObtainWrite(&volp->rw);
1307 if ((tsp->cellp==volp->cellp) && (volp->vol[ROVOL].serversp))
1308 code =cm_ChangeRankServer(&volp->vol[ROVOL].serversp, tsp);
1310 /* this volume list was changed */
1312 cm_RandomizeServer(&volp->vol[ROVOL].serversp);
1314 lock_ReleaseWrite(&volp->rw);
1315 lock_ObtainRead(&cm_volumeLock);
1316 refCount = InterlockedDecrement(&volp->refCount);
1317 osi_assertx(refCount >= 0, "cm_volume_t refCount underflow");
1319 lock_ReleaseRead(&cm_volumeLock);
1322 /* dump all volumes that have reference count > 0 to a file.
1323 * cookie is used to identify this batch for easy parsing,
1324 * and it a string provided by a caller
1326 int cm_DumpVolumes(FILE *outputFile, char *cookie, int lock)
1333 lock_ObtainRead(&cm_scacheLock);
1334 lock_ObtainRead(&cm_volumeLock);
1337 sprintf(output, "%s - dumping volumes - cm_data.currentVolumes=%d, cm_data.maxVolumes=%d\r\n", cookie, cm_data.currentVolumes, cm_data.maxVolumes);
1338 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1340 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp)
1342 sprintf(output, "%s - volp=0x%p cell=%s name=%s rwID=%u roID=%u bkID=%u flags=0x%x refCount=%u\r\n",
1343 cookie, volp, volp->cellp->name, volp->namep, volp->vol[RWVOL].ID, volp->vol[ROVOL].ID, volp->vol[BACKVOL].ID, volp->flags,
1345 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1347 sprintf(output, "%s - Done dumping volumes.\r\n", cookie);
1348 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1351 lock_ReleaseRead(&cm_volumeLock);
1352 lock_ReleaseRead(&cm_scacheLock);
1359 * String hash function used by SDBM project.
1360 * It was chosen because it is fast and provides
1363 afs_uint32 SDBMHash(const char * str)
1365 afs_uint32 hash = 0;
1371 for(i = 0, len = strlen(str); i < len; i++)
1373 hash = str[i] + (hash << 6) + (hash << 16) - hash;
1376 return (hash & 0x7FFFFFFF);
1379 /* call with volume write-locked and mutex held */
1380 void cm_AddVolumeToNameHashTable(cm_volume_t *volp)
1384 if (volp->flags & CM_VOLUMEFLAG_IN_HASH)
1387 i = CM_VOLUME_NAME_HASH(volp->namep);
1389 volp->nameNextp = cm_data.volumeNameHashTablep[i];
1390 cm_data.volumeNameHashTablep[i] = volp;
1391 volp->flags |= CM_VOLUMEFLAG_IN_HASH;
1394 /* call with volume write-locked and mutex held */
1395 void cm_RemoveVolumeFromNameHashTable(cm_volume_t *volp)
1397 cm_volume_t **lvolpp;
1401 if (volp->flags & CM_VOLUMEFLAG_IN_HASH) {
1402 /* hash it out first */
1403 i = CM_VOLUME_NAME_HASH(volp->namep);
1404 for (lvolpp = &cm_data.volumeNameHashTablep[i], tvolp = cm_data.volumeNameHashTablep[i];
1406 lvolpp = &tvolp->nameNextp, tvolp = tvolp->nameNextp) {
1407 if (tvolp == volp) {
1408 *lvolpp = volp->nameNextp;
1409 volp->flags &= ~CM_VOLUMEFLAG_IN_HASH;
1410 volp->nameNextp = NULL;
1417 /* call with volume write-locked and mutex held */
1418 void cm_AddVolumeToIDHashTable(cm_volume_t *volp, afs_uint32 volType)
1421 struct cm_vol_state * statep;
1423 statep = cm_VolumeStateByType(volp, volType);
1425 if (statep->flags & CM_VOLUMEFLAG_IN_HASH)
1428 i = CM_VOLUME_ID_HASH(statep->ID);
1432 statep->nextp = cm_data.volumeRWIDHashTablep[i];
1433 cm_data.volumeRWIDHashTablep[i] = volp;
1436 statep->nextp = cm_data.volumeROIDHashTablep[i];
1437 cm_data.volumeROIDHashTablep[i] = volp;
1440 statep->nextp = cm_data.volumeBKIDHashTablep[i];
1441 cm_data.volumeBKIDHashTablep[i] = volp;
1444 statep->flags |= CM_VOLUMEFLAG_IN_HASH;
1448 /* call with volume write-locked and mutex held */
1449 void cm_RemoveVolumeFromIDHashTable(cm_volume_t *volp, afs_uint32 volType)
1451 cm_volume_t **lvolpp;
1453 struct cm_vol_state * statep;
1456 statep = cm_VolumeStateByType(volp, volType);
1458 if (statep->flags & CM_VOLUMEFLAG_IN_HASH) {
1459 /* hash it out first */
1460 i = CM_VOLUME_ID_HASH(statep->ID);
1464 lvolpp = &cm_data.volumeRWIDHashTablep[i];
1465 tvolp = cm_data.volumeRWIDHashTablep[i];
1468 lvolpp = &cm_data.volumeROIDHashTablep[i];
1469 tvolp = cm_data.volumeROIDHashTablep[i];
1472 lvolpp = &cm_data.volumeBKIDHashTablep[i];
1473 tvolp = cm_data.volumeBKIDHashTablep[i];
1476 osi_assertx(0, "invalid volume type");
1479 if (tvolp == volp) {
1480 *lvolpp = statep->nextp;
1481 statep->flags &= ~CM_VOLUMEFLAG_IN_HASH;
1482 statep->nextp = NULL;
1486 lvolpp = &tvolp->vol[volType].nextp;
1487 tvolp = tvolp->vol[volType].nextp;
1492 /* must be called with cm_volumeLock write-locked! */
1493 void cm_AdjustVolumeLRU(cm_volume_t *volp)
1495 if (volp == cm_data.volumeLRULastp)
1496 cm_data.volumeLRULastp = (cm_volume_t *) osi_QPrev(&volp->q);
1497 if (volp->flags & CM_VOLUMEFLAG_IN_LRU_QUEUE)
1498 osi_QRemoveHT((osi_queue_t **) &cm_data.volumeLRUFirstp, (osi_queue_t **) &cm_data.volumeLRULastp, &volp->q);
1499 osi_QAdd((osi_queue_t **) &cm_data.volumeLRUFirstp, &volp->q);
1500 volp->flags |= CM_VOLUMEFLAG_IN_LRU_QUEUE;
1501 if (!cm_data.volumeLRULastp)
1502 cm_data.volumeLRULastp = volp;
1505 /* must be called with cm_volumeLock write-locked! */
1506 void cm_MoveVolumeToLRULast(cm_volume_t *volp)
1508 if (volp == cm_data.volumeLRULastp)
1511 if (volp == cm_data.volumeLRUFirstp)
1512 cm_data.volumeLRUFirstp = (cm_volume_t *) osi_QNext(&volp->q);
1513 if (volp->flags & CM_VOLUMEFLAG_IN_LRU_QUEUE)
1514 osi_QRemoveHT((osi_queue_t **) &cm_data.volumeLRUFirstp, (osi_queue_t **) &cm_data.volumeLRULastp, &volp->q);
1515 osi_QAddT((osi_queue_t **) &cm_data.volumeLRUFirstp, (osi_queue_t **) &cm_data.volumeLRULastp, &volp->q);
1516 volp->flags |= CM_VOLUMEFLAG_IN_LRU_QUEUE;
1517 if (!cm_data.volumeLRULastp)
1518 cm_data.volumeLRULastp = volp;
1521 /* must be called with cm_volumeLock write-locked! */
1522 void cm_RemoveVolumeFromLRU(cm_volume_t *volp)
1524 if (volp->flags & CM_VOLUMEFLAG_IN_LRU_QUEUE) {
1525 if (volp == cm_data.volumeLRULastp)
1526 cm_data.volumeLRULastp = (cm_volume_t *) osi_QPrev(&volp->q);
1527 osi_QRemoveHT((osi_queue_t **) &cm_data.volumeLRUFirstp, (osi_queue_t **) &cm_data.volumeLRULastp, &volp->q);
1528 volp->flags &= ~CM_VOLUMEFLAG_IN_LRU_QUEUE;
1532 static char * volstatus_str(enum volstatus vs)
1548 void cm_VolumeStatusNotification(cm_volume_t * volp, afs_uint32 volID, enum volstatus old, enum volstatus new)
1550 char volstr[CELL_MAXNAMELEN + VL_MAXNAMELEN]="";
1553 if (volID == volp->vol[RWVOL].ID)
1555 else if (volID == volp->vol[ROVOL].ID)
1557 else if (volID == volp->vol[BACKVOL].ID)
1561 snprintf(volstr, sizeof(volstr), "%s:%s%s", volp->cellp->name, volp->namep, ext);
1563 osi_Log4(afsd_logp, "VolumeStatusNotification: %-48s [%10u] (%s -> %s)",
1564 osi_LogSaveString(afsd_logp, volstr), volID, volstatus_str(old), volstatus_str(new));
1566 cm_VolStatus_Change_Notification(volp->cellp->cellID, volID, new);
1569 enum volstatus cm_GetVolumeStatus(cm_volume_t *volp, afs_uint32 volID)
1571 cm_vol_state_t * statep = cm_VolumeStateByID(volp, volID);
1573 return statep->state;
1578 /* Renew .readonly volume callbacks that are more than
1579 * 30 minutes old. (A volume callback is issued for 2 hours.)
1582 cm_VolumeRenewROCallbacks(void)
1585 time_t minexp = time(NULL) + 90 * 60;
1587 lock_ObtainRead(&cm_volumeLock);
1588 for (volp = cm_data.allVolumesp; volp; volp=volp->allNextp) {
1589 if ( volp->cbExpiresRO > 0 && volp->cbExpiresRO < minexp) {
1594 cm_SetFid(&fid, volp->cellp->cellID, volp->vol[ROVOL].ID, 1, 1);
1598 lock_ReleaseRead(&cm_volumeLock);
1599 if (cm_GetSCache(&fid, &scp, cm_rootUserp, &req) == 0) {
1600 lock_ObtainWrite(&scp->rw);
1601 cm_GetCallback(scp, cm_rootUserp, &req, 1);
1602 lock_ReleaseWrite(&scp->rw);
1603 cm_ReleaseSCache(scp);
1605 lock_ObtainRead(&cm_volumeLock);
1608 lock_ReleaseRead(&cm_volumeLock);
1612 cm_VolumeStateByType(cm_volume_t *volp, afs_uint32 volType)
1614 return &volp->vol[volType];
1618 cm_VolumeStateByID(cm_volume_t *volp, afs_uint32 id)
1620 cm_vol_state_t * statep = NULL;
1622 if (id == volp->vol[RWVOL].ID)
1623 statep = &volp->vol[RWVOL];
1624 else if (id == volp->vol[ROVOL].ID)
1625 statep = &volp->vol[ROVOL];
1626 else if (id == volp->vol[BACKVOL].ID)
1627 statep = &volp->vol[BACKVOL];
1633 cm_VolumeStateByName(cm_volume_t *volp, char *volname)
1635 size_t len = strlen(volname);
1636 cm_vol_state_t *statep;
1638 if (stricmp(".readonly", &volname[len-9]) == 0)
1639 statep = &volp->vol[ROVOL];
1640 else if (stricmp(".backup", &volname[len-7]) == 0)
1641 statep = &volp->vol[BACKVOL];
1643 statep = &volp->vol[RWVOL];