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 <afsconfig.h>
11 #include <afs/param.h>
26 #include <afs/unified_afs.h>
28 /*extern void afsi_log(char *pattern, ...);*/
30 extern osi_hyper_t hzero;
33 osi_queue_t *cm_allFileLocks;
34 osi_queue_t *cm_freeFileLocks;
35 unsigned long cm_lockRefreshCycle;
37 /* lock for globals */
38 osi_rwlock_t cm_scacheLock;
40 /* Dummy scache entry for use with pioctl fids */
41 cm_scache_t cm_fakeSCache;
43 osi_queue_t * cm_allFreeWaiters; /* protected by cm_scacheLock */
45 #ifdef AFS_FREELANCE_CLIENT
46 extern osi_mutex_t cm_Freelance_Lock;
50 cm_RootSCachep(cm_user_t *userp, cm_req_t *reqp)
54 lock_ObtainWrite(&cm_data.rootSCachep->rw);
55 code = cm_SyncOp(cm_data.rootSCachep, NULL, userp, reqp, 0,
56 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
58 cm_SyncOpDone(cm_data.rootSCachep, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
59 lock_ReleaseWrite(&cm_data.rootSCachep->rw);
61 return cm_data.rootSCachep;
65 /* must be called with cm_scacheLock write-locked! */
66 void cm_AdjustScacheLRU(cm_scache_t *scp)
68 lock_AssertWrite(&cm_scacheLock);
69 osi_QRemoveHT((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
70 if (scp->flags & CM_SCACHEFLAG_DELETED) {
71 /* Since it has been deleted make it the first to be recycled. */
72 osi_QAddT((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
74 osi_QAddH((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
78 /* call with cm_scacheLock write-locked and scp rw held */
79 void cm_RemoveSCacheFromHashTable(cm_scache_t *scp)
85 lock_AssertWrite(&cm_scacheLock);
86 lock_AssertWrite(&scp->rw);
87 if (scp->flags & CM_SCACHEFLAG_INHASH) {
88 /* hash it out first */
89 i = CM_SCACHE_HASH(&scp->fid);
90 for (lscpp = &cm_data.scacheHashTablep[i], tscp = cm_data.scacheHashTablep[i];
92 lscpp = &tscp->nextp, tscp = tscp->nextp) {
96 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_INHASH);
103 /* called with cm_scacheLock and scp write-locked */
104 void cm_ResetSCacheDirectory(cm_scache_t *scp, afs_int32 dirlock)
107 /* destroy directory Bplus Tree */
109 LARGE_INTEGER start, end;
111 if (!dirlock && !lock_TryWrite(&scp->dirlock)) {
113 * We are not holding the dirlock and obtaining it
114 * requires that we drop the scp->rw. As a result
115 * we will leave the dirBplus tree intact but
116 * invalidate the version number so that whatever
117 * operation is currently active can safely complete
118 * but the contents will be ignored on the next
119 * directory operation.
121 scp->dirDataVersion = CM_SCACHE_VERSION_BAD;
125 QueryPerformanceCounter(&start);
127 freeBtree(scp->dirBplus);
128 scp->dirBplus = NULL;
129 scp->dirDataVersion = CM_SCACHE_VERSION_BAD;
130 QueryPerformanceCounter(&end);
133 lock_ReleaseWrite(&scp->dirlock);
135 bplus_free_time += (end.QuadPart - start.QuadPart);
140 /* called with cm_scacheLock and scp write-locked; recycles an existing scp. */
141 long cm_RecycleSCache(cm_scache_t *scp, afs_int32 flags)
147 lock_AssertWrite(&cm_scacheLock);
148 lock_AssertWrite(&scp->rw);
150 if (scp->refCount != 0) {
155 if (scp->flags & CM_SCACHEFLAG_SMB_FID) {
156 osi_Log1(afsd_logp,"cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected scp 0x%p", scp);
158 osi_panic("cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected",__FILE__,__LINE__);
163 if (scp->redirBufCount != 0) {
168 fileType = scp->fileType;
169 callback = scp->cbExpires ? 1 : 0;
171 cm_RemoveSCacheFromHashTable(scp);
173 /* invalidate so next merge works fine;
174 * also initialize some flags */
176 _InterlockedAnd(&scp->flags,
177 ~(CM_SCACHEFLAG_STATD
178 | CM_SCACHEFLAG_DELETED
180 | CM_SCACHEFLAG_PURERO
181 | CM_SCACHEFLAG_OVERQUOTA
182 | CM_SCACHEFLAG_OUTOFSPACE
183 | CM_SCACHEFLAG_EACCESS));
184 scp->serverModTime = 0;
185 scp->dataVersion = CM_SCACHE_VERSION_BAD;
186 scp->bufDataVersionLow = CM_SCACHE_VERSION_BAD;
187 scp->bulkStatProgress = hzero;
189 scp->waitQueueT = NULL;
191 if (scp->cbServerp) {
192 cm_PutServer(scp->cbServerp);
193 scp->cbServerp = NULL;
197 scp->volumeCreationDate = 0;
205 /* remove from dnlc */
209 /* discard cached status; if non-zero, Close
210 * tried to store this to server but failed */
213 /* discard symlink info */
214 scp->mountPointStringp[0] = '\0';
215 memset(&scp->mountRootFid, 0, sizeof(cm_fid_t));
216 memset(&scp->dotdotFid, 0, sizeof(cm_fid_t));
218 /* reset locking info */
219 scp->fileLocksH = NULL;
220 scp->fileLocksT = NULL;
221 scp->serverLock = (-1);
222 scp->exclusiveLocks = 0;
223 scp->sharedLocks = 0;
224 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
225 scp->fsLockCount = 0;
227 /* not locked, but there can be no references to this guy
228 * while we hold the global refcount lock.
230 cm_FreeAllACLEnts(scp);
232 cm_ResetSCacheDirectory(scp, 0);
234 if (RDR_Initialized && callback) {
236 * We drop the cm_scacheLock because it may be required to
237 * satisfy an ioctl request from the redirector. It should
238 * be safe to hold the scp->rw lock here because at this
239 * point (a) the object has just been recycled so the fid
240 * is nul and there are no requests that could possibly
241 * be issued by the redirector that would depend upon it.
243 lock_ReleaseWrite(&cm_scacheLock);
244 RDR_InvalidateObject( fid.cell, fid.volume, fid.vnode,
245 fid.unique, fid.hash,
246 fileType, AFS_INVALIDATE_EXPIRED);
247 lock_ObtainWrite(&cm_scacheLock);
255 * called with cm_scacheLock write-locked; find a vnode to recycle.
256 * Can allocate a new one if desperate, or if below quota (cm_data.maxSCaches).
257 * returns scp->rw write-locked.
260 cm_GetNewSCache(afs_uint32 locked)
262 cm_scache_t *scp = NULL;
263 cm_scache_t *scp_prev = NULL;
264 cm_scache_t *scp_next = NULL;
268 lock_AssertWrite(&cm_scacheLock);
270 lock_ObtainWrite(&cm_scacheLock);
272 if (cm_data.currentSCaches >= cm_data.maxSCaches) {
273 /* There were no deleted scache objects that we could use. Try to find
274 * one that simply hasn't been used in a while.
276 for (attempt = 0 ; attempt < 128; attempt++) {
277 afs_uint32 count = 0;
279 for ( scp = cm_data.scacheLRULastp;
281 scp = (cm_scache_t *) osi_QPrev(&scp->q))
284 * We save the prev and next pointers in the
285 * LRU because we are going to drop the cm_scacheLock and
286 * the order of the list could change out from beneath us.
287 * If both changed, it means that this entry has been moved
288 * within the LRU and it should no longer be recycled.
290 scp_prev = (cm_scache_t *) osi_QPrev(&scp->q);
291 scp_next = (cm_scache_t *) osi_QNext(&scp->q);
294 /* It is possible for the refCount to be zero and for there still
295 * to be outstanding dirty buffers. If there are dirty buffers,
296 * we must not recycle the scp.
298 * If the object is in use by the redirector, then avoid recycling
299 * it unless we have to.
301 if (scp->refCount == 0 && scp->bufReadsp == NULL && scp->bufWritesp == NULL) {
302 afs_uint32 buf_dirty = 0;
303 afs_uint32 buf_rdr = 0;
305 lock_ReleaseWrite(&cm_scacheLock);
306 buf_dirty = buf_DirtyBuffersExist(&scp->fid);
308 buf_rdr = buf_RDRBuffersExist(&scp->fid);
310 if (!buf_dirty && !buf_rdr) {
314 if (!lock_TryWrite(&scp->rw)) {
315 lock_ObtainWrite(&cm_scacheLock);
316 if (scp_prev != (cm_scache_t *) osi_QPrev(&scp->q) &&
317 scp_next != (cm_scache_t *) osi_QNext(&scp->q))
323 lock_ObtainWrite(&cm_scacheLock);
324 if (scp_prev != (cm_scache_t *) osi_QPrev(&scp->q) &&
325 scp_next != (cm_scache_t *) osi_QNext(&scp->q))
327 lock_ReleaseWrite(&scp->rw);
331 /* Found a likely candidate. Save type and fid in case we succeed */
333 fileType = scp->fileType;
335 if (!cm_RecycleSCache(scp, 0)) {
336 /* we found an entry, so return it.
337 * remove from the LRU queue and put it back at the
338 * head of the LRU queue.
340 cm_AdjustScacheLRU(scp);
343 osi_assertx(!(scp->flags & CM_SCACHEFLAG_INHASH), "CM_SCACHEFLAG_INHASH set");
346 lock_ReleaseWrite(&scp->rw);
347 } else if (!buf_rdr) {
348 osi_Log1(afsd_logp, "GetNewSCache dirty buffers scp 0x%p", scp);
349 lock_ObtainWrite(&cm_scacheLock);
350 if (scp_prev != (cm_scache_t *) osi_QPrev(&scp->q) &&
351 scp_next != (cm_scache_t *) osi_QNext(&scp->q))
354 osi_Log1(afsd_logp,"GetNewSCache redirector is holding extents scp 0x%p", scp);
355 lock_ObtainWrite(&cm_scacheLock);
356 if (scp_prev != (cm_scache_t *) osi_QPrev(&scp->q) &&
357 scp_next != (cm_scache_t *) osi_QNext(&scp->q))
363 osi_Log2(afsd_logp, "GetNewSCache all scache entries in use (attempt = %d, count = %u)", attempt, count);
368 /* if we get here, we should allocate a new scache entry. We either are below
369 * quota or we have a leak and need to allocate a new one to avoid panicing.
371 scp = cm_data.scacheBaseAddress + cm_data.currentSCaches;
372 osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
373 "invalid cm_scache_t address");
374 memset(scp, 0, sizeof(cm_scache_t));
375 scp->magic = CM_SCACHE_MAGIC;
376 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
377 osi_assertx(lock_TryWrite(&scp->rw), "cm_scache_t rw held after allocation");
378 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
380 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
382 lock_InitializeMutex(&scp->redirMx, "cm_scache_t redirMx", LOCK_HIERARCHY_SCACHE_REDIRMX);
383 scp->serverLock = -1;
384 scp->dataVersion = CM_SCACHE_VERSION_BAD;
385 scp->bufDataVersionLow = CM_SCACHE_VERSION_BAD;
386 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
388 /* and put it in the LRU queue */
389 osi_QAddH((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **)&cm_data.scacheLRULastp, &scp->q);
390 cm_data.currentSCaches++;
391 cm_dnlcPurgedp(scp); /* make doubly sure that this is not in dnlc */
393 scp->allNextp = cm_data.allSCachesp;
394 cm_data.allSCachesp = scp;
398 lock_ReleaseWrite(&cm_scacheLock);
403 void cm_SetFid(cm_fid_t *fidp, afs_uint32 cell, afs_uint32 volume, afs_uint32 vnode, afs_uint32 unique)
406 fidp->volume = volume;
408 fidp->unique = unique;
409 CM_FID_GEN_HASH(fidp);
412 /* like strcmp, only for fids */
413 __inline int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
415 if (ap->hash != bp->hash)
417 if (ap->vnode != bp->vnode)
419 if (ap->volume != bp->volume)
421 if (ap->unique != bp->unique)
423 if (ap->cell != bp->cell)
428 void cm_fakeSCacheInit(int newFile)
431 memset(&cm_data.fakeSCache, 0, sizeof(cm_scache_t));
432 cm_data.fakeSCache.magic = CM_SCACHE_MAGIC;
433 cm_data.fakeSCache.cbServerp = (struct cm_server *)(-1);
434 cm_data.fakeSCache.cbExpires = (time_t)-1;
435 cm_data.fakeSCache.cbExpires = time(NULL);
436 /* can leave clientModTime at 0 */
437 cm_data.fakeSCache.fileType = CM_SCACHETYPE_FILE;
438 cm_data.fakeSCache.unixModeBits = 0777;
439 cm_data.fakeSCache.length.LowPart = 1000;
440 cm_data.fakeSCache.linkCount = 1;
441 cm_data.fakeSCache.refCount = 1;
442 cm_data.fakeSCache.serverLock = -1;
443 cm_data.fakeSCache.dataVersion = CM_SCACHE_VERSION_BAD;
445 lock_InitializeRWLock(&cm_data.fakeSCache.rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
446 lock_InitializeRWLock(&cm_data.fakeSCache.bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
447 lock_InitializeRWLock(&cm_data.fakeSCache.dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
448 lock_InitializeMutex(&cm_data.fakeSCache.redirMx, "cm_scache_t redirMx", LOCK_HIERARCHY_SCACHE_REDIRMX);
452 cm_ValidateSCache(void)
454 cm_scache_t * scp, *lscp;
457 if ( cm_data.scacheLRUFirstp == NULL && cm_data.scacheLRULastp != NULL ||
458 cm_data.scacheLRUFirstp != NULL && cm_data.scacheLRULastp == NULL) {
459 afsi_log("cm_ValidateSCache failure: inconsistent LRU pointers");
460 fprintf(stderr, "cm_ValidateSCache failure: inconsistent LRU pointers\n");
464 for ( scp = cm_data.scacheLRUFirstp, lscp = NULL, i = 0;
466 lscp = scp, scp = (cm_scache_t *) osi_QNext(&scp->q), i++ ) {
467 if (scp->magic != CM_SCACHE_MAGIC) {
468 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
469 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
472 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
473 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
474 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
477 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
478 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
479 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
482 if (i > cm_data.currentSCaches ) {
483 afsi_log("cm_ValidateSCache failure: LRU First queue loops");
484 fprintf(stderr, "cm_ValidateSCache failure: LUR First queue loops\n");
487 if (lscp != (cm_scache_t *) osi_QPrev(&scp->q)) {
488 afsi_log("cm_ValidateSCache failure: QPrev(scp) != previous");
489 fprintf(stderr, "cm_ValidateSCache failure: QPrev(scp) != previous\n");
494 for ( scp = cm_data.scacheLRULastp, lscp = NULL, i = 0; scp;
495 lscp = scp, scp = (cm_scache_t *) osi_QPrev(&scp->q), i++ ) {
496 if (scp->magic != CM_SCACHE_MAGIC) {
497 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
498 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
501 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
502 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
503 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
506 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
507 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
508 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
511 if (i > cm_data.currentSCaches ) {
512 afsi_log("cm_ValidateSCache failure: LRU Last queue loops");
513 fprintf(stderr, "cm_ValidateSCache failure: LUR Last queue loops\n");
516 if (lscp != (cm_scache_t *) osi_QNext(&scp->q)) {
517 afsi_log("cm_ValidateSCache failure: QNext(scp) != next");
518 fprintf(stderr, "cm_ValidateSCache failure: QNext(scp) != next\n");
523 for ( i=0; i < cm_data.scacheHashTableSize; i++ ) {
524 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
526 hash = CM_SCACHE_HASH(&scp->fid);
527 if (scp->magic != CM_SCACHE_MAGIC) {
528 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
529 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
532 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
533 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
534 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
537 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
538 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
539 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
543 afsi_log("cm_ValidateSCache failure: scp hash != hash index");
544 fprintf(stderr, "cm_ValidateSCache failure: scp hash != hash index\n");
550 return cm_dnlcValidate();
554 cm_SuspendSCache(void)
559 cm_GiveUpAllCallbacksAllServersMulti(TRUE);
562 * After this call all servers are marked down.
563 * Do not clear the callbacks, instead change the
564 * expiration time so that the callbacks will be expired
565 * when the servers are marked back up. However, we
566 * want the callbacks to be preserved as long as the
567 * servers are down. That way if the machine resumes
568 * without network, the stat cache item will still be
573 lock_ObtainWrite(&cm_scacheLock);
574 for ( scp = cm_data.allSCachesp; scp; scp = scp->allNextp ) {
575 if (scp->cbServerp) {
576 if (scp->flags & CM_SCACHEFLAG_PURERO) {
577 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
579 if (volp->cbExpiresRO == scp->cbExpires)
580 volp->cbExpiresRO = now+1;
584 scp->cbExpires = now+1;
587 lock_ReleaseWrite(&cm_scacheLock);
591 cm_ShutdownSCache(void)
593 cm_scache_t * scp, * nextp;
595 cm_GiveUpAllCallbacksAllServersMulti(FALSE);
597 lock_ObtainWrite(&cm_scacheLock);
599 for ( scp = cm_data.allSCachesp; scp;
601 nextp = scp->allNextp;
602 lock_ReleaseWrite(&cm_scacheLock);
604 lock_ObtainWrite(&scp->dirlock);
606 lock_ObtainWrite(&scp->rw);
607 lock_ObtainWrite(&cm_scacheLock);
609 if (scp->randomACLp) {
610 cm_FreeAllACLEnts(scp);
613 if (scp->cbServerp) {
614 cm_PutServer(scp->cbServerp);
615 scp->cbServerp = NULL;
619 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_CALLBACK);
620 lock_ReleaseWrite(&scp->rw);
624 freeBtree(scp->dirBplus);
625 scp->dirBplus = NULL;
626 scp->dirDataVersion = CM_SCACHE_VERSION_BAD;
627 lock_ReleaseWrite(&scp->dirlock);
628 lock_FinalizeRWLock(&scp->dirlock);
630 lock_FinalizeRWLock(&scp->rw);
631 lock_FinalizeRWLock(&scp->bufCreateLock);
632 lock_FinalizeMutex(&scp->redirMx);
634 lock_ReleaseWrite(&cm_scacheLock);
636 return cm_dnlcShutdown();
639 void cm_InitSCache(int newFile, long maxSCaches)
641 static osi_once_t once;
643 if (osi_Once(&once)) {
644 lock_InitializeRWLock(&cm_scacheLock, "cm_scacheLock", LOCK_HIERARCHY_SCACHE_GLOBAL);
646 memset(cm_data.scacheHashTablep, 0, sizeof(cm_scache_t *) * cm_data.scacheHashTableSize);
647 cm_data.allSCachesp = NULL;
648 cm_data.currentSCaches = 0;
649 cm_data.maxSCaches = maxSCaches;
650 cm_data.scacheLRUFirstp = cm_data.scacheLRULastp = NULL;
654 for ( scp = cm_data.allSCachesp; scp;
655 scp = scp->allNextp ) {
656 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
657 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
659 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
661 scp->cbServerp = NULL;
664 scp->volumeCreationDate = 0;
665 scp->fileLocksH = NULL;
666 scp->fileLocksT = NULL;
667 scp->serverLock = (-1);
668 scp->lastRefreshCycle = 0;
669 scp->exclusiveLocks = 0;
670 scp->sharedLocks = 0;
678 scp->dirBplus = NULL;
679 scp->dirDataVersion = CM_SCACHE_VERSION_BAD;
681 scp->waitQueueT = NULL;
682 _InterlockedAnd(&scp->flags, ~(CM_SCACHEFLAG_CALLBACK | CM_SCACHEFLAG_WAITING | CM_SCACHEFLAG_RDR_IN_USE));
684 scp->redirBufCount = 0;
685 scp->redirQueueT = NULL;
686 scp->redirQueueH = NULL;
687 lock_InitializeMutex(&scp->redirMx, "cm_scache_t redirMx", LOCK_HIERARCHY_SCACHE_REDIRMX);
690 cm_allFileLocks = NULL;
691 cm_freeFileLocks = NULL;
692 cm_lockRefreshCycle = 0;
693 cm_fakeSCacheInit(newFile);
694 cm_allFreeWaiters = NULL;
695 cm_dnlcInit(newFile);
700 /* version that doesn't bother creating the entry if we don't find it */
701 cm_scache_t *cm_FindSCache(cm_fid_t *fidp)
706 hash = CM_SCACHE_HASH(fidp);
708 if (fidp->cell == 0) {
712 lock_ObtainRead(&cm_scacheLock);
713 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
714 if (cm_FidCmp(fidp, &scp->fid) == 0) {
715 cm_HoldSCacheNoLock(scp);
716 lock_ConvertRToW(&cm_scacheLock);
717 cm_AdjustScacheLRU(scp);
718 lock_ReleaseWrite(&cm_scacheLock);
722 lock_ReleaseRead(&cm_scacheLock);
726 #ifdef DEBUG_REFCOUNT
727 long cm_GetSCacheDbg(cm_fid_t *fidp, cm_fid_t *parentFidp, cm_scache_t **outScpp, cm_user_t *userp,
728 cm_req_t *reqp, char * file, long line)
730 long cm_GetSCache(cm_fid_t *fidp, cm_fid_t *parentFidp, cm_scache_t **outScpp, cm_user_t *userp,
735 cm_scache_t *scp = NULL;
736 cm_scache_t *newScp = NULL;
738 cm_volume_t *volp = NULL;
740 int special = 0; // yj: boolean variable to test if file is on root.afs
742 extern cm_fid_t cm_rootFid;
745 hash = CM_SCACHE_HASH(fidp);
748 return CM_ERROR_INVAL;
750 #ifdef AFS_FREELANCE_CLIENT
751 special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
752 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
753 !(fidp->vnode==0x1 && fidp->unique==0x1));
754 isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
755 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
756 fidp->vnode==0x1 && fidp->unique==0x1);
759 // yj: check if we have the scp, if so, we don't need
760 // to do anything else
761 lock_ObtainRead(&cm_scacheLock);
762 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
763 if (cm_FidCmp(fidp, &scp->fid) == 0) {
764 #ifdef DEBUG_REFCOUNT
765 afsi_log("%s:%d cm_GetSCache (1) scp 0x%p ref %d", file, line, scp, scp->refCount);
766 osi_Log1(afsd_logp,"cm_GetSCache (1) scp 0x%p", scp);
768 #ifdef AFS_FREELANCE_CLIENT
769 if (cm_freelanceEnabled && special &&
770 cm_data.fakeDirVersion != scp->dataVersion)
773 if (parentFidp && scp->parentVnode == 0) {
774 scp->parentVnode = parentFidp->vnode;
775 scp->parentUnique = parentFidp->unique;
777 cm_HoldSCacheNoLock(scp);
779 lock_ConvertRToW(&cm_scacheLock);
780 cm_AdjustScacheLRU(scp);
781 lock_ReleaseWrite(&cm_scacheLock);
785 lock_ReleaseRead(&cm_scacheLock);
787 // yj: when we get here, it means we don't have an scp
788 // so we need to either load it or fake it, depending
789 // on whether the file is "special", see below.
791 // yj: if we're trying to get an scp for a file that's
792 // on root.afs of homecell, we want to handle it specially
793 // because we have to fill in the status stuff 'coz we
794 // don't want trybulkstat to fill it in for us
795 #ifdef AFS_FREELANCE_CLIENT
796 if (cm_freelanceEnabled && isRoot) {
797 osi_Log0(afsd_logp,"cm_GetSCache Freelance and isRoot");
798 /* freelance: if we are trying to get the root scp for the first
799 * time, we will just put in a place holder entry.
804 if (cm_freelanceEnabled && special) {
805 osi_Log0(afsd_logp,"cm_GetSCache Freelance and special");
807 if (cm_getLocalMountPointChange()) {
808 cm_clearLocalMountPointChange();
809 cm_reInitLocalMountPoints();
813 scp = cm_GetNewSCache(FALSE); /* returns scp->rw held */
815 osi_Log0(afsd_logp,"cm_GetSCache unable to obtain *new* scache entry");
816 return CM_ERROR_WOULDBLOCK;
819 lock_ObtainWrite(&scp->rw);
822 cm_SetFid(&scp->dotdotFid,AFS_FAKE_ROOT_CELL_ID,AFS_FAKE_ROOT_VOL_ID,1,1);
824 scp->parentVnode = parentFidp->vnode;
825 scp->parentUnique = parentFidp->unique;
827 _InterlockedOr(&scp->flags, (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO));
828 lock_ObtainWrite(&cm_scacheLock);
829 if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
830 scp->nextp = cm_data.scacheHashTablep[hash];
831 cm_data.scacheHashTablep[hash] = scp;
832 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_INHASH);
834 refCount = InterlockedIncrement(&scp->refCount);
835 osi_Log2(afsd_logp,"cm_GetSCache (freelance) sets refCount to 1 scp 0x%p refCount %d", scp, refCount);
836 lock_ReleaseWrite(&cm_scacheLock);
838 /* must be called after the scp->fid is set */
839 cm_FreelanceFetchMountPointString(scp);
840 cm_FreelanceFetchFileType(scp);
842 scp->length.LowPart = (DWORD)strlen(scp->mountPointStringp)+4;
843 scp->length.HighPart = 0;
845 scp->unixModeBits=0777;
846 scp->clientModTime=FakeFreelanceModTime;
847 scp->serverModTime=FakeFreelanceModTime;
848 scp->parentUnique = 0x1;
849 scp->parentVnode=0x1;
851 scp->dataVersion=cm_data.fakeDirVersion;
852 scp->bufDataVersionLow=cm_data.fakeDirVersion;
853 scp->lockDataVersion=CM_SCACHE_VERSION_BAD; /* no lock yet */
855 lock_ReleaseWrite(&scp->rw);
857 #ifdef DEBUG_REFCOUNT
858 afsi_log("%s:%d cm_GetSCache (2) scp 0x%p ref %d", file, line, scp, scp->refCount);
859 osi_Log1(afsd_logp,"cm_GetSCache (2) scp 0x%p", scp);
864 #endif /* AFS_FREELANCE_CLIENT */
866 /* we don't have the fid, recycle something */
867 newScp = cm_GetNewSCache(FALSE); /* returns scp->rw held */
868 if (newScp == NULL) {
869 osi_Log0(afsd_logp,"cm_GetNewSCache unable to obtain *new* scache entry");
870 return CM_ERROR_WOULDBLOCK;
872 #ifdef DEBUG_REFCOUNT
873 afsi_log("%s:%d cm_GetNewSCache returns scp 0x%p flags 0x%x", file, line, newScp, newScp->flags);
875 osi_Log2(afsd_logp,"cm_GetNewSCache returns scp 0x%p flags 0x%x", newScp, newScp->flags);
877 /* otherwise, we need to find the volume */
878 if (!cm_freelanceEnabled || !isRoot) {
879 cellp = cm_FindCellByID(fidp->cell, 0);
881 /* put back newScp so it can be reused */
882 lock_ObtainWrite(&cm_scacheLock);
883 newScp->flags |= CM_SCACHEFLAG_DELETED;
884 cm_AdjustScacheLRU(newScp);
885 lock_ReleaseWrite(&newScp->rw);
886 lock_ReleaseWrite(&cm_scacheLock);
887 return CM_ERROR_NOSUCHCELL;
890 code = cm_FindVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
892 /* put back newScp so it can be reused */
893 lock_ObtainWrite(&cm_scacheLock);
894 newScp->flags |= CM_SCACHEFLAG_DELETED;
895 cm_AdjustScacheLRU(newScp);
896 lock_ReleaseWrite(&newScp->rw);
897 lock_ReleaseWrite(&cm_scacheLock);
903 * otherwise, we have the volume, now reverify that the scp doesn't
904 * exist, and proceed. make sure that we hold the cm_scacheLock
905 * write-locked until the scp is put into the hash table in order
908 lock_ObtainWrite(&cm_scacheLock);
909 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
910 if (cm_FidCmp(fidp, &scp->fid) == 0) {
911 #ifdef DEBUG_REFCOUNT
912 afsi_log("%s:%d cm_GetSCache (3) scp 0x%p ref %d", file, line, scp, scp->refCount);
913 osi_Log1(afsd_logp,"cm_GetSCache (3) scp 0x%p", scp);
915 if (parentFidp && scp->parentVnode == 0) {
916 scp->parentVnode = parentFidp->vnode;
917 scp->parentUnique = parentFidp->unique;
921 cm_HoldSCacheNoLock(scp);
922 cm_AdjustScacheLRU(scp);
924 /* put back newScp so it can be reused */
925 newScp->flags |= CM_SCACHEFLAG_DELETED;
926 cm_AdjustScacheLRU(newScp);
927 lock_ReleaseWrite(&newScp->rw);
928 lock_ReleaseWrite(&cm_scacheLock);
937 if (!cm_freelanceEnabled || !isRoot) {
938 /* if this scache entry represents a volume root then we need
939 * to copy the dotdotFid from the volume structure where the
940 * "master" copy is stored (defect 11489)
942 if (volp->vol[ROVOL].ID == fidp->volume) {
943 _InterlockedOr(&scp->flags, (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO));
944 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
945 scp->dotdotFid = cm_VolumeStateByType(volp, ROVOL)->dotdotFid;
946 } else if (volp->vol[BACKVOL].ID == fidp->volume) {
947 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_RO);
948 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
949 scp->dotdotFid = cm_VolumeStateByType(volp, BACKVOL)->dotdotFid;
951 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
952 scp->dotdotFid = cm_VolumeStateByType(volp, RWVOL)->dotdotFid;
956 scp->parentVnode = parentFidp->vnode;
957 scp->parentUnique = parentFidp->unique;
962 scp->nextp = cm_data.scacheHashTablep[hash];
963 cm_data.scacheHashTablep[hash] = scp;
964 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_INHASH);
965 refCount = InterlockedIncrement(&scp->refCount);
966 lock_ReleaseWrite(&cm_scacheLock);
967 lock_ReleaseWrite(&scp->rw);
968 #ifdef DEBUG_REFCOUNT
969 afsi_log("%s:%d cm_GetSCache sets refCount to 1 scp 0x%p refCount %d", file, line, scp, refCount);
971 osi_Log2(afsd_logp,"cm_GetSCache sets refCount to 1 scp 0x%p refCount %d", scp, refCount);
973 /* XXX - The following fields in the cm_scache are
980 /* now we have a held scache entry; just return it */
982 #ifdef DEBUG_REFCOUNT
983 afsi_log("%s:%d cm_GetSCache (4) scp 0x%p ref %d", file, line, scp, scp->refCount);
984 osi_Log1(afsd_logp,"cm_GetSCache (4) scp 0x%p", scp);
989 /* Returns a held reference to the scache's parent
991 cm_scache_t * cm_FindSCacheParent(cm_scache_t * scp)
996 cm_scache_t * pscp = NULL;
998 if (scp->parentVnode == 0)
1001 lock_ObtainWrite(&cm_scacheLock);
1002 cm_SetFid(&parent_fid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
1004 if (cm_FidCmp(&scp->fid, &parent_fid)) {
1005 i = CM_SCACHE_HASH(&parent_fid);
1006 for (pscp = cm_data.scacheHashTablep[i]; pscp; pscp = pscp->nextp) {
1007 if (!cm_FidCmp(&pscp->fid, &parent_fid)) {
1008 cm_HoldSCacheNoLock(pscp);
1014 lock_ReleaseWrite(&cm_scacheLock);
1019 void cm_SyncOpAddToWaitQueue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
1021 cm_scache_waiter_t * w;
1023 lock_ObtainWrite(&cm_scacheLock);
1024 if (cm_allFreeWaiters == NULL) {
1025 w = malloc(sizeof(*w));
1026 memset(w, 0, sizeof(*w));
1028 w = (cm_scache_waiter_t *) cm_allFreeWaiters;
1029 osi_QRemove(&cm_allFreeWaiters, (osi_queue_t *) w);
1032 w->threadId = thrd_Current();
1034 cm_HoldSCacheNoLock(scp);
1038 osi_QAddT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
1039 lock_ReleaseWrite(&cm_scacheLock);
1041 osi_Log2(afsd_logp, "cm_SyncOpAddToWaitQueue : Adding thread to wait queue scp 0x%p w 0x%p", scp, w);
1044 int cm_SyncOpCheckContinue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
1046 cm_scache_waiter_t * w;
1049 osi_Log0(afsd_logp, "cm_SyncOpCheckContinue checking for continuation");
1051 lock_ObtainRead(&cm_scacheLock);
1052 for (w = (cm_scache_waiter_t *)scp->waitQueueH;
1054 w = (cm_scache_waiter_t *)osi_QNext((osi_queue_t *) w)) {
1055 if (w->flags == flags && w->bufp == bufp) {
1060 osi_assertx(w != NULL, "null cm_scache_waiter_t");
1061 this_is_me = (w->threadId == thrd_Current());
1062 lock_ReleaseRead(&cm_scacheLock);
1065 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue MISS: Waiter 0x%p", w);
1069 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue HIT: Waiter 0x%p", w);
1071 lock_ObtainWrite(&cm_scacheLock);
1072 osi_QRemoveHT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
1073 cm_ReleaseSCacheNoLock(scp);
1074 memset(w, 0, sizeof(*w));
1075 osi_QAdd(&cm_allFreeWaiters, (osi_queue_t *) w);
1076 lock_ReleaseWrite(&cm_scacheLock);
1082 /* synchronize a fetch, store, read, write, fetch status or store status.
1083 * Called with scache mutex held, and returns with it held, but temporarily
1084 * drops it during the fetch.
1086 * At most one flag can be on in flags, if this is an RPC request.
1088 * Also, if we're fetching or storing data, we must ensure that we have a buffer.
1090 * There are a lot of weird restrictions here; here's an attempt to explain the
1091 * rationale for the concurrency restrictions implemented in this function.
1093 * First, although the file server will break callbacks when *another* machine
1094 * modifies a file or status block, the client itself is responsible for
1095 * concurrency control on its own requests. Callback breaking events are rare,
1096 * and simply invalidate any concurrent new status info.
1098 * In the absence of callback breaking messages, we need to know how to
1099 * synchronize incoming responses describing updates to files. We synchronize
1100 * operations that update the data version by comparing the data versions.
1101 * However, updates that do not update the data, but only the status, can't be
1102 * synchronized with fetches or stores, since there's nothing to compare
1103 * to tell which operation executed first at the server.
1105 * Thus, we can allow multiple ops that change file data, or dir data, and
1106 * fetches. However, status storing ops have to be done serially.
1108 * Furthermore, certain data-changing ops are incompatible: we can't read or
1109 * write a buffer while doing a truncate. We can't read and write the same
1110 * buffer at the same time, or write while fetching or storing, or read while
1111 * fetching a buffer (this may change). We can't fetch and store at the same
1114 * With respect to status, we can't read and write at the same time, read while
1115 * fetching, write while fetching or storing, or fetch and store at the same time.
1117 * We can't allow a get callback RPC to run in concurrently with something that
1118 * will return updated status, since we could start a call, have the server
1119 * return status, have another machine make an update to the status (which
1120 * doesn't change serverModTime), have the original machine get a new callback,
1121 * and then have the original machine merge in the early, old info from the
1122 * first call. At this point, the easiest way to avoid this problem is to have
1123 * getcallback calls conflict with all others for the same vnode. Other calls
1124 * to cm_MergeStatus that aren't associated with calls to cm_SyncOp on the same
1125 * vnode must be careful not to merge in their status unless they have obtained
1126 * a callback from the start of their call.
1128 * Note added 1/23/96
1129 * Concurrent StoreData RPC's can cause trouble if the file is being extended.
1130 * Each such RPC passes a FileLength parameter, which the server uses to do
1131 * pre-truncation if necessary. So if two RPC's are processed out of order at
1132 * the server, the one with the smaller FileLength will be processed last,
1133 * possibly resulting in a bogus truncation. The simplest way to avoid this
1134 * is to serialize all StoreData RPC's. This is the reason we defined
1135 * CM_SCACHESYNC_STOREDATA_EXCL and CM_SCACHEFLAG_DATASTORING.
1137 * CM_SCACHESYNC_BULKREAD is used to permit synchronization of multiple bulk
1138 * readers which may be requesting overlapping ranges.
1140 long cm_SyncOp(cm_scache_t *scp, cm_buf_t *bufp, cm_user_t *userp, cm_req_t *reqp,
1141 afs_uint32 rights, afs_uint32 flags)
1143 osi_queueData_t *qdp;
1146 afs_uint32 outRights;
1148 afs_uint32 sleep_scp_flags = 0;
1149 afs_uint32 sleep_buf_cmflags = 0;
1150 afs_uint32 sleep_scp_bufs = 0;
1153 lock_AssertWrite(&scp->rw);
1155 /* lookup this first */
1156 bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
1159 osi_assertx(bufp->refCount > 0, "cm_buf_t refCount 0");
1162 /* Do the access check. Now we don't really do the access check
1163 * atomically, since the caller doesn't expect the parent dir to be
1164 * returned locked, and that is what we'd have to do to prevent a
1165 * callback breaking message on the parent due to a setacl call from
1166 * being processed while we're running. So, instead, we check things
1167 * here, and if things look fine with the access, we proceed to finish
1168 * the rest of this check. Sort of a hack, but probably good enough.
1172 if (flags & CM_SCACHESYNC_FETCHSTATUS) {
1173 /* if we're bringing in a new status block, ensure that
1174 * we aren't already doing so, and that no one is
1175 * changing the status concurrently, either. We need
1176 * to do this, even if the status is of a different
1177 * type, since we don't have the ability to figure out,
1178 * in the AFS 3 protocols, which status-changing
1179 * operation ran first, or even which order a read and
1180 * a write occurred in.
1182 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1183 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1184 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING|GETCALLBACK want FETCHSTATUS", scp);
1188 if (flags & (CM_SCACHESYNC_STORESIZE | CM_SCACHESYNC_STORESTATUS
1189 | CM_SCACHESYNC_SETSIZE | CM_SCACHESYNC_GETCALLBACK)) {
1190 /* if we're going to make an RPC to change the status, make sure
1191 * that no one is bringing in or sending out the status.
1193 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1194 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1195 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING|GETCALLBACK want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1198 if ((!bufp || bufp && scp->fileType == CM_SCACHETYPE_FILE) &&
1199 (scp->bufReadsp || scp->bufWritesp)) {
1200 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is bufRead|bufWrite want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1204 if (flags & CM_SCACHESYNC_FETCHDATA) {
1205 /* if we're bringing in a new chunk of data, make sure that
1206 * nothing is happening to that chunk, and that we aren't
1207 * changing the basic file status info, either.
1209 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1210 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1211 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING|GETCALLBACK want FETCHDATA", scp);
1214 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1215 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want FETCHDATA", scp, bufp);
1219 if (flags & CM_SCACHESYNC_STOREDATA) {
1220 /* same as fetch data */
1221 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1222 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1223 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STOREDATA", scp);
1226 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1227 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want STOREDATA", scp, bufp);
1232 if (flags & CM_SCACHESYNC_STOREDATA_EXCL) {
1233 /* Don't allow concurrent StoreData RPC's */
1234 if (scp->flags & CM_SCACHEFLAG_DATASTORING) {
1235 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is DATASTORING want STOREDATA_EXCL", scp);
1240 if (flags & CM_SCACHESYNC_ASYNCSTORE) {
1241 /* Don't allow more than one BKG store request */
1242 if (scp->flags & CM_SCACHEFLAG_ASYNCSTORING) {
1243 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is ASYNCSTORING want ASYNCSTORE", scp);
1248 if (flags & CM_SCACHESYNC_LOCK) {
1249 /* Don't allow concurrent fiddling with lock lists */
1250 if (scp->flags & CM_SCACHEFLAG_LOCKING) {
1251 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is LOCKING want LOCK", scp);
1256 /* now the operations that don't correspond to making RPCs */
1257 if (flags & CM_SCACHESYNC_GETSTATUS) {
1258 /* we can use the status that's here, if we're not
1259 * bringing in new status.
1261 if (scp->flags & (CM_SCACHEFLAG_FETCHING)) {
1262 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want GETSTATUS", scp);
1266 if (flags & CM_SCACHESYNC_SETSTATUS) {
1267 /* we can make a change to the local status, as long as
1268 * the status isn't changing now.
1270 * If we're fetching or storing a chunk of data, we can
1271 * change the status locally, since the fetch/store
1272 * operations don't change any of the data that we're
1275 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING |
1276 CM_SCACHEFLAG_SIZESETTING | CM_SCACHEFLAG_SIZESTORING)) {
1277 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING want SETSTATUS", scp);
1281 if (flags & CM_SCACHESYNC_READ) {
1282 /* we're going to read the data, make sure that the
1283 * status is available, and that the data is here. It
1284 * is OK to read while storing the data back.
1286 if (scp->flags & CM_SCACHEFLAG_FETCHING) {
1287 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want READ", scp);
1290 if (bufp && ((bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED)) == CM_BUF_CMFETCHING)) {
1291 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING want READ", scp, bufp);
1294 if (bufp && (bufp->cmFlags & CM_BUF_CMWRITING)) {
1295 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMWRITING want READ", scp, bufp);
1299 if (flags & CM_SCACHESYNC_WRITE) {
1300 /* don't write unless the status is stable and the chunk
1303 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1304 CM_SCACHEFLAG_SIZESTORING)) {
1305 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING want WRITE", scp);
1308 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING |
1310 CM_BUF_CMWRITING))) {
1311 osi_Log3(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is %s want WRITE",
1313 ((bufp->cmFlags & CM_BUF_CMFETCHING) ? "CM_BUF_CMFETCHING":
1314 ((bufp->cmFlags & CM_BUF_CMSTORING) ? "CM_BUF_CMSTORING" :
1315 ((bufp->cmFlags & CM_BUF_CMWRITING) ? "CM_BUF_CMWRITING" :
1321 if ((flags & CM_SCACHESYNC_NEEDCALLBACK)) {
1322 if ((flags & CM_SCACHESYNC_FORCECB) || !cm_HaveCallback(scp)) {
1323 osi_Log1(afsd_logp, "CM SyncOp getting callback on scp 0x%p",
1326 lock_ReleaseMutex(&bufp->mx);
1327 code = cm_GetCallback(scp, userp, reqp, (flags & CM_SCACHESYNC_FORCECB)?1:0);
1329 lock_ReleaseWrite(&scp->rw);
1330 lock_ObtainMutex(&bufp->mx);
1331 lock_ObtainWrite(&scp->rw);
1335 flags &= ~CM_SCACHESYNC_FORCECB; /* only force once */
1341 /* can't check access rights without a callback */
1342 osi_assertx(flags & CM_SCACHESYNC_NEEDCALLBACK, "!CM_SCACHESYNC_NEEDCALLBACK");
1344 if ((rights & (PRSFS_WRITE|PRSFS_DELETE)) && (scp->flags & CM_SCACHEFLAG_RO))
1345 return CM_ERROR_READONLY;
1347 if (cm_HaveAccessRights(scp, userp, reqp, rights, &outRights)) {
1348 if (~outRights & rights)
1349 return CM_ERROR_NOACCESS;
1352 /* we don't know the required access rights */
1353 if (bufLocked) lock_ReleaseMutex(&bufp->mx);
1354 code = cm_GetAccessRights(scp, userp, reqp);
1356 lock_ReleaseWrite(&scp->rw);
1357 lock_ObtainMutex(&bufp->mx);
1358 lock_ObtainWrite(&scp->rw);
1366 if (flags & CM_SCACHESYNC_BULKREAD) {
1367 /* Don't allow concurrent fiddling with lock lists */
1368 if (scp->flags & CM_SCACHEFLAG_BULKREADING) {
1369 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is BULKREADING want BULKREAD", scp);
1374 /* if we get here, we're happy */
1378 /* first check if we're not supposed to wait: fail
1379 * in this case, returning with everything still locked.
1381 if (flags & CM_SCACHESYNC_NOWAIT)
1382 return CM_ERROR_WOULDBLOCK;
1384 /* These are used for minidump debugging */
1385 sleep_scp_flags = scp->flags; /* so we know why we slept */
1386 sleep_buf_cmflags = bufp ? bufp->cmFlags : 0;
1387 sleep_scp_bufs = (scp->bufReadsp ? 1 : 0) | (scp->bufWritesp ? 2 : 0);
1389 /* wait here, then try again */
1390 osi_Log1(afsd_logp, "CM SyncOp sleeping scp 0x%p", scp);
1391 if ( scp->flags & CM_SCACHEFLAG_WAITING ) {
1393 scp->waitRequests++;
1394 osi_Log3(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING already set for 0x%p; %d threads; %d requests",
1395 scp, scp->waitCount, scp->waitRequests);
1397 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING set for 0x%p", scp);
1398 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_WAITING);
1399 scp->waitCount = scp->waitRequests = 1;
1402 cm_SyncOpAddToWaitQueue(scp, flags, bufp);
1406 lock_ReleaseMutex(&bufp->mx);
1407 osi_SleepW((LONG_PTR) &scp->flags, &scp->rw);
1409 lock_ObtainMutex(&bufp->mx);
1410 lock_ObtainWrite(&scp->rw);
1411 } while (!cm_SyncOpCheckContinue(scp, flags, bufp));
1413 cm_UpdateServerPriority();
1416 osi_Log3(afsd_logp, "CM SyncOp woke! scp 0x%p; still waiting %d threads of %d requests",
1417 scp, scp->waitCount, scp->waitRequests);
1418 if (scp->waitCount == 0) {
1419 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING reset for 0x%p", scp);
1420 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_WAITING);
1421 scp->waitRequests = 0;
1423 } /* big while loop */
1425 /* now, update the recorded state for RPC-type calls */
1426 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1427 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_FETCHING);
1428 if (flags & CM_SCACHESYNC_STORESTATUS)
1429 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_STORING);
1430 if (flags & CM_SCACHESYNC_SETSIZE)
1431 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_SIZESETTING);
1432 if (flags & CM_SCACHESYNC_STORESIZE)
1433 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_SIZESTORING);
1434 if (flags & CM_SCACHESYNC_GETCALLBACK)
1435 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_GETCALLBACK);
1436 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1437 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_DATASTORING);
1438 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1439 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_ASYNCSTORING);
1440 if (flags & CM_SCACHESYNC_LOCK)
1441 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_LOCKING);
1442 if (flags & CM_SCACHESYNC_BULKREAD)
1443 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_BULKREADING);
1445 /* now update the buffer pointer */
1446 if (bufp && (flags & CM_SCACHESYNC_FETCHDATA)) {
1447 /* ensure that the buffer isn't already in the I/O list */
1448 for (qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1449 tbufp = osi_GetQData(qdp);
1450 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1453 /* queue a held reference to the buffer in the "reading" I/O list */
1454 qdp = osi_QDAlloc();
1455 osi_SetQData(qdp, bufp);
1458 _InterlockedOr(&bufp->cmFlags, CM_BUF_CMFETCHING);
1459 osi_QAdd((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1462 if (bufp && (flags & CM_SCACHESYNC_STOREDATA)) {
1463 osi_assertx(scp->fileType == CM_SCACHETYPE_FILE,
1464 "attempting to store extents on a non-file object");
1466 /* ensure that the buffer isn't already in the I/O list */
1467 for (qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1468 tbufp = osi_GetQData(qdp);
1469 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1472 /* queue a held reference to the buffer in the "writing" I/O list */
1473 qdp = osi_QDAlloc();
1474 osi_SetQData(qdp, bufp);
1476 _InterlockedOr(&bufp->cmFlags, CM_BUF_CMSTORING);
1477 osi_QAdd((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1480 if (bufp && (flags & CM_SCACHESYNC_WRITE)) {
1481 /* mark the buffer as being written to. */
1482 _InterlockedOr(&bufp->cmFlags, CM_BUF_CMWRITING);
1488 /* for those syncops that setup for RPCs.
1489 * Called with scache locked.
1491 void cm_SyncOpDone(cm_scache_t *scp, cm_buf_t *bufp, afs_uint32 flags)
1493 osi_queueData_t *qdp;
1496 lock_AssertWrite(&scp->rw);
1498 /* now, update the recorded state for RPC-type calls */
1499 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1500 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_FETCHING);
1501 if (flags & CM_SCACHESYNC_STORESTATUS)
1502 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_STORING);
1503 if (flags & CM_SCACHESYNC_SETSIZE)
1504 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_SIZESETTING);
1505 if (flags & CM_SCACHESYNC_STORESIZE)
1506 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_SIZESTORING);
1507 if (flags & CM_SCACHESYNC_GETCALLBACK)
1508 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_GETCALLBACK);
1509 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1510 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_DATASTORING);
1511 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1512 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_ASYNCSTORING);
1513 if (flags & CM_SCACHESYNC_LOCK)
1514 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_LOCKING);
1515 if (flags & CM_SCACHESYNC_BULKREAD)
1516 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_BULKREADING);
1518 /* now update the buffer pointer */
1519 if (bufp && (flags & CM_SCACHESYNC_FETCHDATA)) {
1522 /* ensure that the buffer is in the I/O list */
1523 for (qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1524 tbufp = osi_GetQData(qdp);
1529 osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1533 _InterlockedAnd(&bufp->cmFlags, ~(CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED));
1534 if (bufp->flags & CM_BUF_WAITING) {
1535 osi_Log2(afsd_logp, "CM SyncOpDone FetchData Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1536 osi_Wakeup((LONG_PTR) &bufp);
1542 /* now update the buffer pointer */
1543 if (bufp && (flags & CM_SCACHESYNC_STOREDATA)) {
1545 /* ensure that the buffer is in the I/O list */
1546 for (qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1547 tbufp = osi_GetQData(qdp);
1552 osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1556 _InterlockedAnd(&bufp->cmFlags, ~CM_BUF_CMSTORING);
1557 if (bufp->flags & CM_BUF_WAITING) {
1558 osi_Log2(afsd_logp, "CM SyncOpDone StoreData Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1559 osi_Wakeup((LONG_PTR) &bufp);
1565 if (bufp && (flags & CM_SCACHESYNC_WRITE)) {
1566 osi_assertx(bufp->cmFlags & CM_BUF_CMWRITING, "!CM_BUF_CMWRITING");
1567 _InterlockedAnd(&bufp->cmFlags, ~CM_BUF_CMWRITING);
1570 /* and wakeup anyone who is waiting */
1571 if (scp->flags & CM_SCACHEFLAG_WAITING) {
1572 osi_Log3(afsd_logp, "CM SyncOpDone 0x%x Waking scp 0x%p bufp 0x%p", flags, scp, bufp);
1573 osi_Wakeup((LONG_PTR) &scp->flags);
1578 dv_diff(afs_uint64 dv1, afs_uint64 dv2)
1580 if ( dv1 - dv2 > 0x7FFFFFFF )
1581 return (afs_uint32)(dv2 - dv1);
1583 return (afs_uint32)(dv1 - dv2);
1586 /* merge in a response from an RPC. The scp must be locked, and the callback
1589 * Don't overwrite any status info that is dirty, since we could have a store
1590 * operation (such as store data) that merges some info in, and we don't want
1591 * to lose the local updates. Typically, there aren't many updates we do
1592 * locally, anyway, probably only mtime.
1594 * There is probably a bug in here where a chmod (which doesn't change
1595 * serverModTime) that occurs between two fetches, both of whose responses are
1596 * handled after the callback breaking is done, but only one of whose calls
1597 * started before that, can cause old info to be merged from the first call.
1599 void cm_MergeStatus(cm_scache_t *dscp,
1600 cm_scache_t *scp, AFSFetchStatus *statusp,
1601 AFSVolSync *volsyncp,
1602 cm_user_t *userp, cm_req_t *reqp, afs_uint32 flags)
1604 afs_uint64 dataVersion;
1605 struct cm_volume *volp = NULL;
1606 struct cm_cell *cellp = NULL;
1607 int rdr_invalidate = 0;
1608 afs_uint32 activeRPCs;
1610 lock_AssertWrite(&scp->rw);
1612 activeRPCs = 1 + InterlockedDecrement(&scp->activeRPCs);
1614 // yj: i want to create some fake status for the /afs directory and the
1615 // entries under that directory
1616 #ifdef AFS_FREELANCE_CLIENT
1617 if (cm_freelanceEnabled && scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1618 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1619 if (scp == cm_data.rootSCachep) {
1620 osi_Log0(afsd_logp,"cm_MergeStatus Freelance cm_data.rootSCachep");
1621 statusp->FileType = CM_SCACHETYPE_DIRECTORY;
1622 statusp->Length = cm_fakeDirSize;
1623 statusp->Length_hi = 0;
1625 statusp->FileType = scp->fileType;
1626 statusp->Length = scp->length.LowPart;
1627 statusp->Length_hi = scp->length.HighPart;
1629 statusp->InterfaceVersion = 0x1;
1630 statusp->LinkCount = scp->linkCount;
1631 statusp->DataVersion = (afs_uint32)(cm_data.fakeDirVersion & 0xFFFFFFFF);
1632 statusp->Author = 0x1;
1633 statusp->Owner = 0x0;
1634 statusp->CallerAccess = 0x9;
1635 statusp->AnonymousAccess = 0x9;
1636 statusp->UnixModeBits = 0777;
1637 statusp->ParentVnode = 0x1;
1638 statusp->ParentUnique = 0x1;
1639 statusp->ResidencyMask = 0;
1640 statusp->ClientModTime = FakeFreelanceModTime;
1641 statusp->ServerModTime = FakeFreelanceModTime;
1643 statusp->SyncCounter = 0;
1644 statusp->dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
1645 statusp->lockCount = 0;
1646 statusp->errorCode = 0;
1648 #endif /* AFS_FREELANCE_CLIENT */
1650 if (statusp->errorCode != 0) {
1651 switch (statusp->errorCode) {
1656 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_EACCESS);
1658 osi_Log2(afsd_logp, "Merge, Failure scp 0x%p code 0x%x", scp, statusp->errorCode);
1660 if (scp->fid.vnode & 0x1)
1661 scp->fileType = CM_SCACHETYPE_DIRECTORY;
1663 scp->fileType = 0; /* unknown */
1665 scp->serverModTime = 0;
1666 scp->clientModTime = 0;
1667 scp->length.LowPart = 0;
1668 scp->length.HighPart = 0;
1669 scp->serverLength.LowPart = 0;
1670 scp->serverLength.HighPart = 0;
1674 scp->unixModeBits = 0;
1676 scp->dataVersion = CM_SCACHE_VERSION_BAD;
1677 scp->bufDataVersionLow = CM_SCACHE_VERSION_BAD;
1678 scp->fsLockCount = 0;
1680 if (dscp && dscp != scp) {
1681 scp->parentVnode = dscp->fid.vnode;
1682 scp->parentUnique = dscp->fid.unique;
1684 scp->parentVnode = 0;
1685 scp->parentUnique = 0;
1688 if (RDR_Initialized)
1691 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_EACCESS);
1694 dataVersion = statusp->dataVersionHigh;
1696 dataVersion |= statusp->DataVersion;
1698 if (!(flags & CM_MERGEFLAG_FORCE) &&
1699 dataVersion < scp->dataVersion &&
1700 scp->dataVersion != CM_SCACHE_VERSION_BAD) {
1702 cellp = cm_FindCellByID(scp->fid.cell, 0);
1703 if (scp->cbServerp) {
1704 cm_FindVolumeByID(cellp, scp->fid.volume, userp,
1705 reqp, CM_GETVOL_FLAG_CREATE, &volp);
1706 osi_Log2(afsd_logp, "old data from server %x volume %s",
1707 scp->cbServerp->addr.sin_addr.s_addr,
1708 volp ? volp->namep : "(unknown)");
1711 osi_Log3(afsd_logp, "Bad merge, scp 0x%p, scp dv %d, RPC dv %d",
1712 scp, scp->dataVersion, dataVersion);
1713 /* we have a number of data fetch/store operations running
1714 * concurrently, and we can tell which one executed last at the
1715 * server by its mtime.
1716 * Choose the one with the largest mtime, and ignore the rest.
1718 * These concurrent calls are incompatible with setting the
1719 * mtime, so we won't have a locally changed mtime here.
1721 * We could also have ACL info for a different user than usual,
1722 * in which case we have to do that part of the merge, anyway.
1723 * We won't have to worry about the info being old, since we
1724 * won't have concurrent calls
1725 * that change file status running from this machine.
1727 * Added 3/17/98: if we see data version regression on an RO
1728 * file, it's probably due to a server holding an out-of-date
1729 * replica, rather than to concurrent RPC's. Failures to
1730 * release replicas are now flagged by the volserver, but only
1731 * since AFS 3.4 5.22, so there are plenty of clients getting
1732 * out-of-date replicas out there.
1734 * If we discover an out-of-date replica, by this time it's too
1735 * late to go to another server and retry. Also, we can't
1736 * reject the merge, because then there is no way for
1737 * GetAccess to do its work, and the caller gets into an
1738 * infinite loop. So we just grin and bear it.
1740 if (!(scp->flags & CM_SCACHEFLAG_RO))
1744 if (cm_readonlyVolumeVersioning)
1745 scp->volumeCreationDate = volsyncp->spare1; /* volume creation date */
1747 scp->serverModTime = statusp->ServerModTime;
1749 if (!(scp->mask & CM_SCACHEMASK_CLIENTMODTIME)) {
1750 scp->clientModTime = statusp->ClientModTime;
1752 if (!(scp->mask & CM_SCACHEMASK_LENGTH)) {
1753 scp->length.LowPart = statusp->Length;
1754 scp->length.HighPart = statusp->Length_hi;
1757 scp->serverLength.LowPart = statusp->Length;
1758 scp->serverLength.HighPart = statusp->Length_hi;
1760 scp->linkCount = statusp->LinkCount;
1761 scp->owner = statusp->Owner;
1762 scp->group = statusp->Group;
1763 scp->unixModeBits = statusp->UnixModeBits & 07777;
1765 if (statusp->FileType == File)
1766 scp->fileType = CM_SCACHETYPE_FILE;
1767 else if (statusp->FileType == Directory)
1768 scp->fileType = CM_SCACHETYPE_DIRECTORY;
1769 else if (statusp->FileType == SymbolicLink) {
1770 if ((scp->unixModeBits & 0111) == 0)
1771 scp->fileType = CM_SCACHETYPE_MOUNTPOINT;
1773 scp->fileType = CM_SCACHETYPE_SYMLINK;
1776 osi_Log2(afsd_logp, "Merge, Invalid File Type (%d), scp 0x%p", statusp->FileType, scp);
1777 scp->fileType = CM_SCACHETYPE_INVALID; /* invalid */
1779 /* and other stuff */
1780 scp->parentVnode = statusp->ParentVnode;
1781 scp->parentUnique = statusp->ParentUnique;
1783 /* -1 is a write lock; any positive values are read locks */
1784 scp->fsLockCount = (afs_int32)statusp->lockCount;
1786 /* and merge in the private acl cache info, if this is more than the public
1787 * info; merge in the public stuff in any case.
1789 scp->anyAccess = statusp->AnonymousAccess;
1791 if (userp != NULL) {
1792 cm_AddACLCache(scp, userp, statusp->CallerAccess);
1795 if (dataVersion != 0 && scp->dataVersion != CM_SCACHE_VERSION_BAD &&
1796 (!(flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && (dataVersion != scp->dataVersion) ||
1797 (flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) &&
1798 (dv_diff(dataVersion, scp->dataVersion) > activeRPCs))) {
1800 * We now know that all of the data buffers that we have associated
1801 * with this scp are invalid. Subsequent operations will go faster
1802 * if the buffers are removed from the hash tables.
1804 * We do not remove directory buffers if the dataVersion delta is 'activeRPCs' because
1805 * those version numbers will be updated as part of the directory operation.
1807 * We do not remove storedata buffers because they will still be valid.
1812 cm_buf_t *bp, *prevBp, *nextBp;
1814 lock_ObtainWrite(&buf_globalLock);
1815 i = BUF_FILEHASH(&scp->fid);
1816 for (bp = cm_data.buf_fileHashTablepp[i]; bp; bp=nextBp)
1818 nextBp = bp->fileHashp;
1820 * if the buffer belongs to this stat cache entry
1821 * and the buffer mutex can be obtained, check the
1822 * reference count and if it is zero, remove the buffer
1823 * from the hash tables. If there are references,
1824 * the buffer might be updated to the current version
1825 * so leave it in place.
1827 if (cm_FidCmp(&scp->fid, &bp->fid) == 0 &&
1828 lock_TryMutex(&bp->mx)) {
1829 if (bp->refCount == 0 &&
1830 !(bp->flags & (CM_BUF_READING | CM_BUF_WRITING | CM_BUF_DIRTY)) &&
1831 !(bp->qFlags & CM_BUF_QREDIR)) {
1832 prevBp = bp->fileHashBackp;
1833 bp->fileHashBackp = bp->fileHashp = NULL;
1835 prevBp->fileHashp = nextBp;
1837 cm_data.buf_fileHashTablepp[i] = nextBp;
1839 nextBp->fileHashBackp = prevBp;
1841 j = BUF_HASH(&bp->fid, &bp->offset);
1842 lbpp = &(cm_data.buf_scacheHashTablepp[j]);
1843 for(tbp = *lbpp; tbp; lbpp = &tbp->hashp, tbp = tbp->hashp) {
1848 /* we better find it */
1849 osi_assertx(tbp != NULL, "cm_MergeStatus: buf_scacheHashTablepp table screwup");
1851 *lbpp = bp->hashp; /* hash out */
1854 _InterlockedAnd(&bp->qFlags, ~CM_BUF_QINHASH);
1856 lock_ReleaseMutex(&bp->mx);
1859 lock_ReleaseWrite(&buf_globalLock);
1863 * If the dataVersion has changed, the mountPointStringp must be cleared
1864 * in order to force a re-evaluation by cm_HandleLink(). The Windows CM
1865 * does not update a mountpoint or symlink by altering the contents of
1866 * the file data; but the Unix CM does.
1868 if (scp->dataVersion != dataVersion && !(flags & CM_MERGEFLAG_FETCHDATA)) {
1869 scp->mountPointStringp[0] = '\0';
1871 osi_Log5(afsd_logp, "cm_MergeStatus data version change scp 0x%p cell %u vol %u vn %u uniq %u",
1872 scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1874 osi_Log4(afsd_logp, ".... oldDV 0x%x:%x -> newDV 0x%x:%x",
1875 (afs_uint32)((scp->dataVersion >> 32) & 0xFFFFFFFF),
1876 (afs_uint32)(scp->dataVersion & 0xFFFFFFFF),
1877 (afs_uint32)((dataVersion >> 32) & 0xFFFFFFFF),
1878 (afs_uint32)(dataVersion & 0xFFFFFFFF));
1881 /* We maintain a range of buffer dataVersion values which are considered
1882 * valid. This avoids the need to update the dataVersion on each buffer
1883 * object during an uncontested storeData operation. As a result this
1884 * merge status no longer has performance characteristics derived from
1885 * the size of the file.
1887 * For directory buffers, only current dataVersion values are up to date.
1889 if (((flags & (CM_MERGEFLAG_STOREDATA|CM_MERGEFLAG_DIROP)) && (dv_diff(dataVersion, scp->dataVersion) > activeRPCs)) ||
1890 (!(flags & (CM_MERGEFLAG_STOREDATA|CM_MERGEFLAG_DIROP)) && (scp->dataVersion != dataVersion)) ||
1891 scp->bufDataVersionLow == CM_SCACHE_VERSION_BAD ||
1892 scp->fileType == CM_SCACHETYPE_DIRECTORY)
1893 scp->bufDataVersionLow = dataVersion;
1895 if (RDR_Initialized) {
1897 * The redirector maintains its own cached status information which
1898 * must be updated when a DV change occurs that is not the result
1899 * of a redirector initiated data change.
1901 * If the current old DV is BAD, send a DV change notification.
1903 * If the DV has changed and request was not initiated by the
1904 * redirector, send a DV change notification.
1906 * If the request was initiated by the redirector, send a notification
1907 * for store and directory operations that result in a DV change greater
1908 * than the number of active RPCs or any other operation that results
1909 * in an unexpected DV change such as FetchStatus.
1912 if (scp->dataVersion == CM_SCACHE_VERSION_BAD && dataVersion != 0) {
1914 } else if (!(reqp->flags & CM_REQ_SOURCE_REDIR) && scp->dataVersion != dataVersion) {
1916 } else if (reqp->flags & CM_REQ_SOURCE_REDIR) {
1917 if (!(flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) &&
1918 (dv_diff(dataVersion, scp->dataVersion) > activeRPCs - 1)) {
1920 } else if ((flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) &&
1921 dv_diff(dataVersion, scp->dataVersion) > activeRPCs) {
1926 scp->dataVersion = dataVersion;
1929 * If someone is waiting for status information, we can wake them up
1930 * now even though the entity that issued the FetchStatus may not
1931 * have completed yet.
1933 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS);
1936 * We just successfully merged status on the stat cache object.
1937 * This means that the associated volume must be online.
1941 cellp = cm_FindCellByID(scp->fid.cell, 0);
1942 cm_FindVolumeByID(cellp, scp->fid.volume, userp, reqp, 0, &volp);
1945 cm_vol_state_t *statep = cm_VolumeStateByID(volp, scp->fid.volume);
1946 if (statep->state != vl_online) {
1947 lock_ObtainWrite(&volp->rw);
1948 cm_VolumeStatusNotification(volp, statep->ID, statep->state, vl_online);
1949 statep->state = vl_online;
1950 lock_ReleaseWrite(&volp->rw);
1959 * The scache rw lock cannot be held across the invalidation.
1960 * Doing so can result in deadlocks with other threads processing
1961 * requests initiated by the afs redirector.
1963 if (rdr_invalidate) {
1964 lock_ReleaseWrite(&scp->rw);
1965 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
1966 scp->fid.unique, scp->fid.hash,
1967 scp->fileType, AFS_INVALIDATE_DATA_VERSION);
1968 lock_ObtainWrite(&scp->rw);
1972 /* note that our stat cache info is incorrect, so force us eventually
1973 * to stat the file again. There may be dirty data associated with
1974 * this vnode, and we want to preserve that information.
1976 * This function works by simply simulating a loss of the callback.
1978 * This function must be called with the scache locked.
1980 void cm_DiscardSCache(cm_scache_t *scp)
1982 lock_AssertWrite(&scp->rw);
1983 if (scp->cbServerp) {
1984 cm_PutServer(scp->cbServerp);
1985 scp->cbServerp = NULL;
1989 scp->volumeCreationDate = 0;
1990 _InterlockedAnd(&scp->flags, ~(CM_SCACHEFLAG_CALLBACK | CM_SCACHEFLAG_LOCAL | CM_SCACHEFLAG_RDR_IN_USE));
1991 cm_dnlcPurgedp(scp);
1992 cm_dnlcPurgevp(scp);
1993 cm_FreeAllACLEnts(scp);
1995 if (scp->fileType == CM_SCACHETYPE_DFSLINK)
1996 cm_VolStatus_Invalidate_DFS_Mapping(scp);
1998 /* Force mount points and symlinks to be re-evaluated */
1999 scp->mountPointStringp[0] = '\0';
2002 void cm_AFSFidFromFid(AFSFid *afsFidp, cm_fid_t *fidp)
2004 afsFidp->Volume = fidp->volume;
2005 afsFidp->Vnode = fidp->vnode;
2006 afsFidp->Unique = fidp->unique;
2009 #ifdef DEBUG_REFCOUNT
2010 void cm_HoldSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
2012 void cm_HoldSCacheNoLock(cm_scache_t *scp)
2017 osi_assertx(scp != NULL, "null cm_scache_t");
2018 lock_AssertAny(&cm_scacheLock);
2019 refCount = InterlockedIncrement(&scp->refCount);
2020 #ifdef DEBUG_REFCOUNT
2021 osi_Log2(afsd_logp,"cm_HoldSCacheNoLock scp 0x%p ref %d",scp, refCount);
2022 afsi_log("%s:%d cm_HoldSCacheNoLock scp 0x%p, ref %d", file, line, scp, refCount);
2026 #ifdef DEBUG_REFCOUNT
2027 void cm_HoldSCacheDbg(cm_scache_t *scp, char * file, long line)
2029 void cm_HoldSCache(cm_scache_t *scp)
2034 osi_assertx(scp != NULL, "null cm_scache_t");
2035 lock_ObtainRead(&cm_scacheLock);
2036 refCount = InterlockedIncrement(&scp->refCount);
2037 #ifdef DEBUG_REFCOUNT
2038 osi_Log2(afsd_logp,"cm_HoldSCache scp 0x%p ref %d",scp, refCount);
2039 afsi_log("%s:%d cm_HoldSCache scp 0x%p ref %d", file, line, scp, refCount);
2041 lock_ReleaseRead(&cm_scacheLock);
2044 #ifdef DEBUG_REFCOUNT
2045 void cm_ReleaseSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
2047 void cm_ReleaseSCacheNoLock(cm_scache_t *scp)
2052 osi_assertx(scp != NULL, "null cm_scache_t");
2053 lock_AssertAny(&cm_scacheLock);
2055 refCount = InterlockedDecrement(&scp->refCount);
2056 #ifdef DEBUG_REFCOUNT
2058 osi_Log1(afsd_logp,"cm_ReleaseSCacheNoLock about to panic scp 0x%x",scp);
2060 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
2061 #ifdef DEBUG_REFCOUNT
2062 osi_Log2(afsd_logp,"cm_ReleaseSCacheNoLock scp 0x%p ref %d",scp, refCount);
2063 afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, refCount);
2066 if (refCount == 0 && (scp->flags & CM_SCACHEFLAG_DELETED)) {
2070 lockstate = lock_GetRWLockState(&cm_scacheLock);
2071 if (lockstate != OSI_RWLOCK_WRITEHELD)
2072 lock_ReleaseRead(&cm_scacheLock);
2074 lock_ReleaseWrite(&cm_scacheLock);
2076 lock_ObtainWrite(&scp->rw);
2077 if (scp->flags & CM_SCACHEFLAG_DELETED)
2080 if (refCount == 0 && deleted) {
2081 lock_ObtainWrite(&cm_scacheLock);
2082 cm_RecycleSCache(scp, 0);
2083 if (lockstate != OSI_RWLOCK_WRITEHELD)
2084 lock_ConvertWToR(&cm_scacheLock);
2086 if (lockstate != OSI_RWLOCK_WRITEHELD)
2087 lock_ObtainRead(&cm_scacheLock);
2089 lock_ObtainWrite(&cm_scacheLock);
2091 lock_ReleaseWrite(&scp->rw);
2095 #ifdef DEBUG_REFCOUNT
2096 void cm_ReleaseSCacheDbg(cm_scache_t *scp, char * file, long line)
2098 void cm_ReleaseSCache(cm_scache_t *scp)
2103 osi_assertx(scp != NULL, "null cm_scache_t");
2104 lock_ObtainRead(&cm_scacheLock);
2105 refCount = InterlockedDecrement(&scp->refCount);
2106 #ifdef DEBUG_REFCOUNT
2108 osi_Log1(afsd_logp,"cm_ReleaseSCache about to panic scp 0x%x",scp);
2110 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
2111 #ifdef DEBUG_REFCOUNT
2112 osi_Log2(afsd_logp,"cm_ReleaseSCache scp 0x%p ref %d",scp, refCount);
2113 afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, refCount);
2115 lock_ReleaseRead(&cm_scacheLock);
2117 if (scp->flags & CM_SCACHEFLAG_DELETED) {
2119 lock_ObtainWrite(&scp->rw);
2120 if (scp->flags & CM_SCACHEFLAG_DELETED)
2123 lock_ObtainWrite(&cm_scacheLock);
2124 cm_RecycleSCache(scp, 0);
2125 lock_ReleaseWrite(&cm_scacheLock);
2127 lock_ReleaseWrite(&scp->rw);
2131 /* just look for the scp entry to get filetype */
2132 /* doesn't need to be perfectly accurate, so locking doesn't matter too much */
2133 int cm_FindFileType(cm_fid_t *fidp)
2138 hash = CM_SCACHE_HASH(fidp);
2140 osi_assertx(fidp->cell != 0, "unassigned cell value");
2142 lock_ObtainWrite(&cm_scacheLock);
2143 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
2144 if (cm_FidCmp(fidp, &scp->fid) == 0) {
2145 lock_ReleaseWrite(&cm_scacheLock);
2146 return scp->fileType;
2149 lock_ReleaseWrite(&cm_scacheLock);
2153 /* dump all scp's that have reference count > 0 to a file.
2154 * cookie is used to identify this batch for easy parsing,
2155 * and it a string provided by a caller
2157 int cm_DumpSCache(FILE *outputFile, char *cookie, int lock)
2166 lock_ObtainRead(&cm_scacheLock);
2168 sprintf(output, "%s - dumping all scache - cm_data.currentSCaches=%d, cm_data.maxSCaches=%d\r\n", cookie, cm_data.currentSCaches, cm_data.maxSCaches);
2169 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2171 for (scp = cm_data.allSCachesp; scp; scp = scp->allNextp)
2174 char *srvStr = NULL;
2175 afs_uint32 srvStrRpc = TRUE;
2179 if (scp->cbServerp) {
2180 if (!((scp->cbServerp->flags & CM_SERVERFLAG_UUID) &&
2181 UuidToString((UUID *)&scp->cbServerp->uuid, &srvStr) == RPC_S_OK)) {
2182 srvStr = malloc(16); /* enough for 255.255.255.255 */
2184 afs_inet_ntoa_r(scp->cbServerp->addr.sin_addr.s_addr, srvStr);
2188 if (scp->cbExpires) {
2193 cbt[strlen(cbt)-1] = '\0';
2196 if (scp->volumeCreationDate) {
2197 t = scp->volumeCreationDate;
2200 cdrot = strdup(cdrot);
2201 cdrot[strlen(cdrot)-1] = '\0';
2205 "%s scp=0x%p, fid (cell=%d, volume=%d, vnode=%d, unique=%d) type=%d dv=%I64d len=0x%I64x "
2206 "mp='%s' Locks (server=0x%x shared=%d excl=%d clnt=%d) fsLockCount=%d linkCount=%d anyAccess=0x%x "
2207 "flags=0x%x cbServer='%s' cbExpires='%s' volumeCreationDate='%s' refCount=%u\r\n",
2208 cookie, scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
2209 scp->fileType, scp->dataVersion, scp->length.QuadPart, scp->mountPointStringp,
2210 scp->serverLock, scp->sharedLocks, scp->exclusiveLocks, scp->clientLocks, scp->fsLockCount,
2211 scp->linkCount, scp->anyAccess, scp->flags, srvStr ? srvStr : "<none>", cbt ? cbt : "<none>",
2212 cdrot ? cdrot : "<none>", scp->refCount);
2213 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2215 if (scp->fileLocksH) {
2216 sprintf(output, " %s - begin dumping scp locks\r\n", cookie);
2217 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2219 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
2220 cm_file_lock_t * lockp = fileq_to_cm_file_lock_t(q);
2221 sprintf(output, " %s lockp=0x%p scp=0x%p, cm_userp=0x%p offset=0x%I64x len=0x%08I64x type=0x%x "
2222 "key=0x%I64x flags=0x%x update=0x%I64u\r\n",
2223 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
2224 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
2225 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2228 sprintf(output, " %s - done dumping scp locks\r\n", cookie);
2229 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2234 RpcStringFree(&srvStr);
2244 sprintf(output, "%s - Done dumping all scache.\r\n", cookie);
2245 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2246 sprintf(output, "%s - dumping cm_data.scacheHashTable - cm_data.scacheHashTableSize=%d\r\n",
2247 cookie, cm_data.scacheHashTableSize);
2248 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2250 for (i = 0; i < cm_data.scacheHashTableSize; i++)
2252 for(scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp)
2254 sprintf(output, "%s scp=0x%p, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d)\r\n",
2255 cookie, scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
2256 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2260 sprintf(output, "%s - Done dumping cm_data.scacheHashTable\r\n", cookie);
2261 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2263 sprintf(output, "%s - begin dumping all file locks\r\n", cookie);
2264 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2266 for (q = cm_allFileLocks; q; q = osi_QNext(q)) {
2267 cm_file_lock_t * lockp = (cm_file_lock_t *)q;
2268 sprintf(output, "%s filelockp=0x%p scp=0x%p, cm_userp=0x%p offset=0x%I64x len=0x%08I64x type=0x%x key=0x%I64x flags=0x%x update=0x%I64u\r\n",
2269 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
2270 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
2271 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2274 sprintf(output, "%s - done dumping all file locks\r\n", cookie);
2275 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2278 lock_ReleaseRead(&cm_scacheLock);