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);
342 /* and we're done - SUCCESS */
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);
370 /* if we get here, we should allocate a new scache entry. We either are below
371 * quota or we have a leak and need to allocate a new one to avoid panicing.
373 scp = cm_data.scacheBaseAddress + cm_data.currentSCaches;
374 osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
375 "invalid cm_scache_t address");
376 memset(scp, 0, sizeof(cm_scache_t));
377 scp->magic = CM_SCACHE_MAGIC;
378 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
379 osi_assertx(lock_TryWrite(&scp->rw), "cm_scache_t rw held after allocation");
380 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
382 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
384 lock_InitializeMutex(&scp->redirMx, "cm_scache_t redirMx", LOCK_HIERARCHY_SCACHE_REDIRMX);
385 scp->serverLock = -1;
386 scp->dataVersion = CM_SCACHE_VERSION_BAD;
387 scp->bufDataVersionLow = CM_SCACHE_VERSION_BAD;
388 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
390 /* and put it in the LRU queue */
391 osi_QAddH((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **)&cm_data.scacheLRULastp, &scp->q);
392 cm_data.currentSCaches++;
393 cm_dnlcPurgedp(scp); /* make doubly sure that this is not in dnlc */
395 scp->allNextp = cm_data.allSCachesp;
396 cm_data.allSCachesp = scp;
400 lock_ReleaseWrite(&cm_scacheLock);
405 void cm_SetFid(cm_fid_t *fidp, afs_uint32 cell, afs_uint32 volume, afs_uint32 vnode, afs_uint32 unique)
408 fidp->volume = volume;
410 fidp->unique = unique;
411 CM_FID_GEN_HASH(fidp);
414 /* like strcmp, only for fids */
415 __inline int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
417 if (ap->hash != bp->hash)
419 if (ap->vnode != bp->vnode)
421 if (ap->volume != bp->volume)
423 if (ap->unique != bp->unique)
425 if (ap->cell != bp->cell)
430 void cm_fakeSCacheInit(int newFile)
433 memset(&cm_data.fakeSCache, 0, sizeof(cm_scache_t));
434 cm_data.fakeSCache.magic = CM_SCACHE_MAGIC;
435 cm_data.fakeSCache.cbServerp = (struct cm_server *)(-1);
436 cm_data.fakeSCache.cbExpires = (time_t)-1;
437 cm_data.fakeSCache.cbExpires = time(NULL);
438 /* can leave clientModTime at 0 */
439 cm_data.fakeSCache.fileType = CM_SCACHETYPE_FILE;
440 cm_data.fakeSCache.unixModeBits = 0777;
441 cm_data.fakeSCache.length.LowPart = 1000;
442 cm_data.fakeSCache.linkCount = 1;
443 cm_data.fakeSCache.refCount = 1;
444 cm_data.fakeSCache.serverLock = -1;
445 cm_data.fakeSCache.dataVersion = CM_SCACHE_VERSION_BAD;
447 lock_InitializeRWLock(&cm_data.fakeSCache.rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
448 lock_InitializeRWLock(&cm_data.fakeSCache.bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
449 lock_InitializeRWLock(&cm_data.fakeSCache.dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
450 lock_InitializeMutex(&cm_data.fakeSCache.redirMx, "cm_scache_t redirMx", LOCK_HIERARCHY_SCACHE_REDIRMX);
454 cm_ValidateSCache(void)
456 cm_scache_t * scp, *lscp;
459 if ( cm_data.scacheLRUFirstp == NULL && cm_data.scacheLRULastp != NULL ||
460 cm_data.scacheLRUFirstp != NULL && cm_data.scacheLRULastp == NULL) {
461 afsi_log("cm_ValidateSCache failure: inconsistent LRU pointers");
462 fprintf(stderr, "cm_ValidateSCache failure: inconsistent LRU pointers\n");
466 for ( scp = cm_data.scacheLRUFirstp, lscp = NULL, i = 0;
468 lscp = scp, scp = (cm_scache_t *) osi_QNext(&scp->q), i++ ) {
469 if (scp->magic != CM_SCACHE_MAGIC) {
470 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
471 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
474 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
475 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
476 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
479 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
480 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
481 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
484 if (i > cm_data.currentSCaches ) {
485 afsi_log("cm_ValidateSCache failure: LRU First queue loops");
486 fprintf(stderr, "cm_ValidateSCache failure: LUR First queue loops\n");
489 if (lscp != (cm_scache_t *) osi_QPrev(&scp->q)) {
490 afsi_log("cm_ValidateSCache failure: QPrev(scp) != previous");
491 fprintf(stderr, "cm_ValidateSCache failure: QPrev(scp) != previous\n");
496 for ( scp = cm_data.scacheLRULastp, lscp = NULL, i = 0; scp;
497 lscp = scp, scp = (cm_scache_t *) osi_QPrev(&scp->q), i++ ) {
498 if (scp->magic != CM_SCACHE_MAGIC) {
499 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
500 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
503 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
504 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
505 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
508 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
509 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
510 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
513 if (i > cm_data.currentSCaches ) {
514 afsi_log("cm_ValidateSCache failure: LRU Last queue loops");
515 fprintf(stderr, "cm_ValidateSCache failure: LUR Last queue loops\n");
518 if (lscp != (cm_scache_t *) osi_QNext(&scp->q)) {
519 afsi_log("cm_ValidateSCache failure: QNext(scp) != next");
520 fprintf(stderr, "cm_ValidateSCache failure: QNext(scp) != next\n");
525 for ( i=0; i < cm_data.scacheHashTableSize; i++ ) {
526 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
528 hash = CM_SCACHE_HASH(&scp->fid);
529 if (scp->magic != CM_SCACHE_MAGIC) {
530 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
531 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
534 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
535 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
536 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
539 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
540 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
541 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
545 afsi_log("cm_ValidateSCache failure: scp hash != hash index");
546 fprintf(stderr, "cm_ValidateSCache failure: scp hash != hash index\n");
552 return cm_dnlcValidate();
556 cm_SuspendSCache(void)
561 cm_GiveUpAllCallbacksAllServersMulti(TRUE);
564 * After this call all servers are marked down.
565 * Do not clear the callbacks, instead change the
566 * expiration time so that the callbacks will be expired
567 * when the servers are marked back up. However, we
568 * want the callbacks to be preserved as long as the
569 * servers are down. That way if the machine resumes
570 * without network, the stat cache item will still be
575 lock_ObtainWrite(&cm_scacheLock);
576 for ( scp = cm_data.allSCachesp; scp; scp = scp->allNextp ) {
577 if (scp->cbServerp) {
578 if (scp->flags & CM_SCACHEFLAG_PURERO) {
579 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
581 if (volp->cbExpiresRO == scp->cbExpires)
582 volp->cbExpiresRO = now+1;
586 scp->cbExpires = now+1;
589 lock_ReleaseWrite(&cm_scacheLock);
593 cm_ShutdownSCache(void)
595 cm_scache_t * scp, * nextp;
597 cm_GiveUpAllCallbacksAllServersMulti(FALSE);
599 lock_ObtainWrite(&cm_scacheLock);
601 for ( scp = cm_data.allSCachesp; scp;
603 nextp = scp->allNextp;
604 lock_ReleaseWrite(&cm_scacheLock);
606 lock_ObtainWrite(&scp->dirlock);
608 lock_ObtainWrite(&scp->rw);
609 lock_ObtainWrite(&cm_scacheLock);
611 if (scp->randomACLp) {
612 cm_FreeAllACLEnts(scp);
615 if (scp->cbServerp) {
616 cm_PutServer(scp->cbServerp);
617 scp->cbServerp = NULL;
621 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_CALLBACK);
622 lock_ReleaseWrite(&scp->rw);
626 freeBtree(scp->dirBplus);
627 scp->dirBplus = NULL;
628 scp->dirDataVersion = CM_SCACHE_VERSION_BAD;
629 lock_ReleaseWrite(&scp->dirlock);
630 lock_FinalizeRWLock(&scp->dirlock);
632 lock_FinalizeRWLock(&scp->rw);
633 lock_FinalizeRWLock(&scp->bufCreateLock);
634 lock_FinalizeMutex(&scp->redirMx);
636 lock_ReleaseWrite(&cm_scacheLock);
638 return cm_dnlcShutdown();
641 void cm_InitSCache(int newFile, long maxSCaches)
643 static osi_once_t once;
645 if (osi_Once(&once)) {
646 lock_InitializeRWLock(&cm_scacheLock, "cm_scacheLock", LOCK_HIERARCHY_SCACHE_GLOBAL);
648 memset(cm_data.scacheHashTablep, 0, sizeof(cm_scache_t *) * cm_data.scacheHashTableSize);
649 cm_data.allSCachesp = NULL;
650 cm_data.currentSCaches = 0;
651 cm_data.maxSCaches = maxSCaches;
652 cm_data.scacheLRUFirstp = cm_data.scacheLRULastp = NULL;
656 for ( scp = cm_data.allSCachesp; scp;
657 scp = scp->allNextp ) {
658 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
659 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
661 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
663 scp->cbServerp = NULL;
666 scp->volumeCreationDate = 0;
667 scp->fileLocksH = NULL;
668 scp->fileLocksT = NULL;
669 scp->serverLock = (-1);
670 scp->lastRefreshCycle = 0;
671 scp->exclusiveLocks = 0;
672 scp->sharedLocks = 0;
680 scp->dirBplus = NULL;
681 scp->dirDataVersion = CM_SCACHE_VERSION_BAD;
683 scp->waitQueueT = NULL;
684 _InterlockedAnd(&scp->flags, ~(CM_SCACHEFLAG_CALLBACK | CM_SCACHEFLAG_WAITING | CM_SCACHEFLAG_RDR_IN_USE));
686 scp->redirBufCount = 0;
687 scp->redirQueueT = NULL;
688 scp->redirQueueH = NULL;
689 lock_InitializeMutex(&scp->redirMx, "cm_scache_t redirMx", LOCK_HIERARCHY_SCACHE_REDIRMX);
692 cm_allFileLocks = NULL;
693 cm_freeFileLocks = NULL;
694 cm_lockRefreshCycle = 0;
695 cm_fakeSCacheInit(newFile);
696 cm_allFreeWaiters = NULL;
697 cm_dnlcInit(newFile);
702 /* version that doesn't bother creating the entry if we don't find it */
703 cm_scache_t *cm_FindSCache(cm_fid_t *fidp)
708 hash = CM_SCACHE_HASH(fidp);
710 if (fidp->cell == 0) {
714 lock_ObtainRead(&cm_scacheLock);
715 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
716 if (cm_FidCmp(fidp, &scp->fid) == 0) {
717 cm_HoldSCacheNoLock(scp);
718 lock_ConvertRToW(&cm_scacheLock);
719 cm_AdjustScacheLRU(scp);
720 lock_ReleaseWrite(&cm_scacheLock);
724 lock_ReleaseRead(&cm_scacheLock);
728 #ifdef DEBUG_REFCOUNT
729 long cm_GetSCacheDbg(cm_fid_t *fidp, cm_fid_t *parentFidp, cm_scache_t **outScpp, cm_user_t *userp,
730 cm_req_t *reqp, char * file, long line)
732 long cm_GetSCache(cm_fid_t *fidp, cm_fid_t *parentFidp, cm_scache_t **outScpp, cm_user_t *userp,
737 cm_scache_t *scp = NULL;
738 cm_scache_t *newScp = NULL;
740 cm_volume_t *volp = NULL;
742 int special = 0; // yj: boolean variable to test if file is on root.afs
744 extern cm_fid_t cm_rootFid;
747 hash = CM_SCACHE_HASH(fidp);
750 return CM_ERROR_INVAL;
752 #ifdef AFS_FREELANCE_CLIENT
753 special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
754 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
755 !(fidp->vnode==0x1 && fidp->unique==0x1));
756 isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
757 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
758 fidp->vnode==0x1 && fidp->unique==0x1);
761 // yj: check if we have the scp, if so, we don't need
762 // to do anything else
763 lock_ObtainRead(&cm_scacheLock);
764 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
765 if (cm_FidCmp(fidp, &scp->fid) == 0) {
766 #ifdef DEBUG_REFCOUNT
767 afsi_log("%s:%d cm_GetSCache (1) scp 0x%p ref %d", file, line, scp, scp->refCount);
768 osi_Log1(afsd_logp,"cm_GetSCache (1) scp 0x%p", scp);
770 #ifdef AFS_FREELANCE_CLIENT
771 if (cm_freelanceEnabled && special &&
772 cm_data.fakeDirVersion != scp->dataVersion)
775 if (parentFidp && scp->parentVnode == 0) {
776 scp->parentVnode = parentFidp->vnode;
777 scp->parentUnique = parentFidp->unique;
779 cm_HoldSCacheNoLock(scp);
781 lock_ConvertRToW(&cm_scacheLock);
782 cm_AdjustScacheLRU(scp);
783 lock_ReleaseWrite(&cm_scacheLock);
787 lock_ReleaseRead(&cm_scacheLock);
789 // yj: when we get here, it means we don't have an scp
790 // so we need to either load it or fake it, depending
791 // on whether the file is "special", see below.
793 // yj: if we're trying to get an scp for a file that's
794 // on root.afs of homecell, we want to handle it specially
795 // because we have to fill in the status stuff 'coz we
796 // don't want trybulkstat to fill it in for us
797 #ifdef AFS_FREELANCE_CLIENT
798 if (cm_freelanceEnabled && isRoot) {
799 osi_Log0(afsd_logp,"cm_GetSCache Freelance and isRoot");
800 /* freelance: if we are trying to get the root scp for the first
801 * time, we will just put in a place holder entry.
806 if (cm_freelanceEnabled && special) {
807 osi_Log0(afsd_logp,"cm_GetSCache Freelance and special");
809 if (cm_getLocalMountPointChange()) {
810 cm_clearLocalMountPointChange();
811 cm_reInitLocalMountPoints();
815 scp = cm_GetNewSCache(FALSE); /* returns scp->rw held */
817 osi_Log0(afsd_logp,"cm_GetSCache unable to obtain *new* scache entry");
818 return CM_ERROR_WOULDBLOCK;
821 lock_ObtainWrite(&scp->rw);
824 cm_SetFid(&scp->dotdotFid,AFS_FAKE_ROOT_CELL_ID,AFS_FAKE_ROOT_VOL_ID,1,1);
826 scp->parentVnode = parentFidp->vnode;
827 scp->parentUnique = parentFidp->unique;
829 _InterlockedOr(&scp->flags, (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO));
830 lock_ObtainWrite(&cm_scacheLock);
831 if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
832 scp->nextp = cm_data.scacheHashTablep[hash];
833 cm_data.scacheHashTablep[hash] = scp;
834 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_INHASH);
836 refCount = InterlockedIncrement(&scp->refCount);
837 osi_Log2(afsd_logp,"cm_GetSCache (freelance) sets refCount to 1 scp 0x%p refCount %d", scp, refCount);
838 lock_ReleaseWrite(&cm_scacheLock);
840 /* must be called after the scp->fid is set */
841 cm_FreelanceFetchMountPointString(scp);
842 cm_FreelanceFetchFileType(scp);
844 scp->length.LowPart = (DWORD)strlen(scp->mountPointStringp)+4;
845 scp->length.HighPart = 0;
847 scp->unixModeBits=0777;
848 scp->clientModTime=FakeFreelanceModTime;
849 scp->serverModTime=FakeFreelanceModTime;
850 scp->parentUnique = 0x1;
851 scp->parentVnode=0x1;
853 scp->dataVersion=cm_data.fakeDirVersion;
854 scp->bufDataVersionLow=cm_data.fakeDirVersion;
855 scp->lockDataVersion=CM_SCACHE_VERSION_BAD; /* no lock yet */
857 lock_ReleaseWrite(&scp->rw);
859 #ifdef DEBUG_REFCOUNT
860 afsi_log("%s:%d cm_GetSCache (2) scp 0x%p ref %d", file, line, scp, scp->refCount);
861 osi_Log1(afsd_logp,"cm_GetSCache (2) scp 0x%p", scp);
866 #endif /* AFS_FREELANCE_CLIENT */
868 /* we don't have the fid, recycle something */
869 newScp = cm_GetNewSCache(FALSE); /* returns scp->rw held */
870 if (newScp == NULL) {
871 osi_Log0(afsd_logp,"cm_GetNewSCache unable to obtain *new* scache entry");
872 return CM_ERROR_WOULDBLOCK;
874 #ifdef DEBUG_REFCOUNT
875 afsi_log("%s:%d cm_GetNewSCache returns scp 0x%p flags 0x%x", file, line, newScp, newScp->flags);
877 osi_Log2(afsd_logp,"cm_GetNewSCache returns scp 0x%p flags 0x%x", newScp, newScp->flags);
879 /* otherwise, we need to find the volume */
880 if (!cm_freelanceEnabled || !isRoot) {
881 cellp = cm_FindCellByID(fidp->cell, 0);
883 /* put back newScp so it can be reused */
884 lock_ObtainWrite(&cm_scacheLock);
885 newScp->flags |= CM_SCACHEFLAG_DELETED;
886 cm_AdjustScacheLRU(newScp);
887 lock_ReleaseWrite(&newScp->rw);
888 lock_ReleaseWrite(&cm_scacheLock);
889 return CM_ERROR_NOSUCHCELL;
892 code = cm_FindVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
894 /* put back newScp so it can be reused */
895 lock_ObtainWrite(&cm_scacheLock);
896 newScp->flags |= CM_SCACHEFLAG_DELETED;
897 cm_AdjustScacheLRU(newScp);
898 lock_ReleaseWrite(&newScp->rw);
899 lock_ReleaseWrite(&cm_scacheLock);
905 * otherwise, we have the volume, now reverify that the scp doesn't
906 * exist, and proceed. make sure that we hold the cm_scacheLock
907 * write-locked until the scp is put into the hash table in order
910 lock_ObtainWrite(&cm_scacheLock);
911 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
912 if (cm_FidCmp(fidp, &scp->fid) == 0) {
913 #ifdef DEBUG_REFCOUNT
914 afsi_log("%s:%d cm_GetSCache (3) scp 0x%p ref %d", file, line, scp, scp->refCount);
915 osi_Log1(afsd_logp,"cm_GetSCache (3) scp 0x%p", scp);
917 if (parentFidp && scp->parentVnode == 0) {
918 scp->parentVnode = parentFidp->vnode;
919 scp->parentUnique = parentFidp->unique;
923 cm_HoldSCacheNoLock(scp);
924 cm_AdjustScacheLRU(scp);
926 /* put back newScp so it can be reused */
927 newScp->flags |= CM_SCACHEFLAG_DELETED;
928 cm_AdjustScacheLRU(newScp);
929 lock_ReleaseWrite(&newScp->rw);
930 lock_ReleaseWrite(&cm_scacheLock);
939 if (!cm_freelanceEnabled || !isRoot) {
940 /* if this scache entry represents a volume root then we need
941 * to copy the dotdotFid from the volume structure where the
942 * "master" copy is stored (defect 11489)
944 if (volp->vol[ROVOL].ID == fidp->volume) {
945 _InterlockedOr(&scp->flags, (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO));
946 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
947 scp->dotdotFid = cm_VolumeStateByType(volp, ROVOL)->dotdotFid;
948 } else if (volp->vol[BACKVOL].ID == fidp->volume) {
949 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_RO);
950 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
951 scp->dotdotFid = cm_VolumeStateByType(volp, BACKVOL)->dotdotFid;
953 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
954 scp->dotdotFid = cm_VolumeStateByType(volp, RWVOL)->dotdotFid;
958 scp->parentVnode = parentFidp->vnode;
959 scp->parentUnique = parentFidp->unique;
964 scp->nextp = cm_data.scacheHashTablep[hash];
965 cm_data.scacheHashTablep[hash] = scp;
966 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_INHASH);
967 refCount = InterlockedIncrement(&scp->refCount);
968 lock_ReleaseWrite(&cm_scacheLock);
969 lock_ReleaseWrite(&scp->rw);
970 #ifdef DEBUG_REFCOUNT
971 afsi_log("%s:%d cm_GetSCache sets refCount to 1 scp 0x%p refCount %d", file, line, scp, refCount);
973 osi_Log2(afsd_logp,"cm_GetSCache sets refCount to 1 scp 0x%p refCount %d", scp, refCount);
975 /* XXX - The following fields in the cm_scache are
982 /* now we have a held scache entry; just return it */
984 #ifdef DEBUG_REFCOUNT
985 afsi_log("%s:%d cm_GetSCache (4) scp 0x%p ref %d", file, line, scp, scp->refCount);
986 osi_Log1(afsd_logp,"cm_GetSCache (4) scp 0x%p", scp);
991 /* Returns a held reference to the scache's parent
993 cm_scache_t * cm_FindSCacheParent(cm_scache_t * scp)
998 cm_scache_t * pscp = NULL;
1000 if (scp->parentVnode == 0)
1003 lock_ObtainWrite(&cm_scacheLock);
1004 cm_SetFid(&parent_fid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
1006 if (cm_FidCmp(&scp->fid, &parent_fid)) {
1007 i = CM_SCACHE_HASH(&parent_fid);
1008 for (pscp = cm_data.scacheHashTablep[i]; pscp; pscp = pscp->nextp) {
1009 if (!cm_FidCmp(&pscp->fid, &parent_fid)) {
1010 cm_HoldSCacheNoLock(pscp);
1016 lock_ReleaseWrite(&cm_scacheLock);
1021 void cm_SyncOpAddToWaitQueue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
1023 cm_scache_waiter_t * w;
1025 lock_ObtainWrite(&cm_scacheLock);
1026 if (cm_allFreeWaiters == NULL) {
1027 w = malloc(sizeof(*w));
1028 memset(w, 0, sizeof(*w));
1030 w = (cm_scache_waiter_t *) cm_allFreeWaiters;
1031 osi_QRemove(&cm_allFreeWaiters, (osi_queue_t *) w);
1034 w->threadId = thrd_Current();
1036 cm_HoldSCacheNoLock(scp);
1040 osi_QAddT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
1041 lock_ReleaseWrite(&cm_scacheLock);
1043 osi_Log2(afsd_logp, "cm_SyncOpAddToWaitQueue : Adding thread to wait queue scp 0x%p w 0x%p", scp, w);
1046 int cm_SyncOpCheckContinue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
1048 cm_scache_waiter_t * w;
1051 osi_Log0(afsd_logp, "cm_SyncOpCheckContinue checking for continuation");
1053 lock_ObtainRead(&cm_scacheLock);
1054 for (w = (cm_scache_waiter_t *)scp->waitQueueH;
1056 w = (cm_scache_waiter_t *)osi_QNext((osi_queue_t *) w)) {
1057 if (w->flags == flags && w->bufp == bufp) {
1062 osi_assertx(w != NULL, "null cm_scache_waiter_t");
1063 this_is_me = (w->threadId == thrd_Current());
1064 lock_ReleaseRead(&cm_scacheLock);
1067 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue MISS: Waiter 0x%p", w);
1071 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue HIT: Waiter 0x%p", w);
1073 lock_ObtainWrite(&cm_scacheLock);
1074 osi_QRemoveHT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
1075 cm_ReleaseSCacheNoLock(scp);
1076 memset(w, 0, sizeof(*w));
1077 osi_QAdd(&cm_allFreeWaiters, (osi_queue_t *) w);
1078 lock_ReleaseWrite(&cm_scacheLock);
1084 /* synchronize a fetch, store, read, write, fetch status or store status.
1085 * Called with scache mutex held, and returns with it held, but temporarily
1086 * drops it during the fetch.
1088 * At most one flag can be on in flags, if this is an RPC request.
1090 * Also, if we're fetching or storing data, we must ensure that we have a buffer.
1092 * There are a lot of weird restrictions here; here's an attempt to explain the
1093 * rationale for the concurrency restrictions implemented in this function.
1095 * First, although the file server will break callbacks when *another* machine
1096 * modifies a file or status block, the client itself is responsible for
1097 * concurrency control on its own requests. Callback breaking events are rare,
1098 * and simply invalidate any concurrent new status info.
1100 * In the absence of callback breaking messages, we need to know how to
1101 * synchronize incoming responses describing updates to files. We synchronize
1102 * operations that update the data version by comparing the data versions.
1103 * However, updates that do not update the data, but only the status, can't be
1104 * synchronized with fetches or stores, since there's nothing to compare
1105 * to tell which operation executed first at the server.
1107 * Thus, we can allow multiple ops that change file data, or dir data, and
1108 * fetches. However, status storing ops have to be done serially.
1110 * Furthermore, certain data-changing ops are incompatible: we can't read or
1111 * write a buffer while doing a truncate. We can't read and write the same
1112 * buffer at the same time, or write while fetching or storing, or read while
1113 * fetching a buffer (this may change). We can't fetch and store at the same
1116 * With respect to status, we can't read and write at the same time, read while
1117 * fetching, write while fetching or storing, or fetch and store at the same time.
1119 * We can't allow a get callback RPC to run in concurrently with something that
1120 * will return updated status, since we could start a call, have the server
1121 * return status, have another machine make an update to the status (which
1122 * doesn't change serverModTime), have the original machine get a new callback,
1123 * and then have the original machine merge in the early, old info from the
1124 * first call. At this point, the easiest way to avoid this problem is to have
1125 * getcallback calls conflict with all others for the same vnode. Other calls
1126 * to cm_MergeStatus that aren't associated with calls to cm_SyncOp on the same
1127 * vnode must be careful not to merge in their status unless they have obtained
1128 * a callback from the start of their call.
1130 * Note added 1/23/96
1131 * Concurrent StoreData RPC's can cause trouble if the file is being extended.
1132 * Each such RPC passes a FileLength parameter, which the server uses to do
1133 * pre-truncation if necessary. So if two RPC's are processed out of order at
1134 * the server, the one with the smaller FileLength will be processed last,
1135 * possibly resulting in a bogus truncation. The simplest way to avoid this
1136 * is to serialize all StoreData RPC's. This is the reason we defined
1137 * CM_SCACHESYNC_STOREDATA_EXCL and CM_SCACHEFLAG_DATASTORING.
1139 * CM_SCACHESYNC_BULKREAD is used to permit synchronization of multiple bulk
1140 * readers which may be requesting overlapping ranges.
1142 long cm_SyncOp(cm_scache_t *scp, cm_buf_t *bufp, cm_user_t *userp, cm_req_t *reqp,
1143 afs_uint32 rights, afs_uint32 flags)
1145 osi_queueData_t *qdp;
1148 afs_uint32 outRights;
1150 afs_uint32 sleep_scp_flags = 0;
1151 afs_uint32 sleep_buf_cmflags = 0;
1152 afs_uint32 sleep_scp_bufs = 0;
1155 lock_AssertWrite(&scp->rw);
1157 /* lookup this first */
1158 bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
1161 osi_assertx(bufp->refCount > 0, "cm_buf_t refCount 0");
1164 /* Do the access check. Now we don't really do the access check
1165 * atomically, since the caller doesn't expect the parent dir to be
1166 * returned locked, and that is what we'd have to do to prevent a
1167 * callback breaking message on the parent due to a setacl call from
1168 * being processed while we're running. So, instead, we check things
1169 * here, and if things look fine with the access, we proceed to finish
1170 * the rest of this check. Sort of a hack, but probably good enough.
1174 if (flags & CM_SCACHESYNC_FETCHSTATUS) {
1175 /* if we're bringing in a new status block, ensure that
1176 * we aren't already doing so, and that no one is
1177 * changing the status concurrently, either. We need
1178 * to do this, even if the status is of a different
1179 * type, since we don't have the ability to figure out,
1180 * in the AFS 3 protocols, which status-changing
1181 * operation ran first, or even which order a read and
1182 * a write occurred in.
1184 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1185 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1186 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING|GETCALLBACK want FETCHSTATUS", scp);
1190 if (flags & (CM_SCACHESYNC_STORESIZE | CM_SCACHESYNC_STORESTATUS
1191 | CM_SCACHESYNC_SETSIZE | CM_SCACHESYNC_GETCALLBACK)) {
1192 /* if we're going to make an RPC to change the status, make sure
1193 * that no one is bringing in or sending out the status.
1195 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1196 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1197 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING|GETCALLBACK want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1200 if ((!bufp || bufp && scp->fileType == CM_SCACHETYPE_FILE) &&
1201 (scp->bufReadsp || scp->bufWritesp)) {
1202 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is bufRead|bufWrite want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1206 if (flags & CM_SCACHESYNC_FETCHDATA) {
1207 /* if we're bringing in a new chunk of data, make sure that
1208 * nothing is happening to that chunk, and that we aren't
1209 * changing the basic file status info, either.
1211 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1212 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1213 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING|GETCALLBACK want FETCHDATA", scp);
1216 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1217 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want FETCHDATA", scp, bufp);
1221 if (flags & CM_SCACHESYNC_STOREDATA) {
1222 /* same as fetch data */
1223 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1224 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1225 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STOREDATA", scp);
1228 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1229 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want STOREDATA", scp, bufp);
1234 if (flags & CM_SCACHESYNC_STOREDATA_EXCL) {
1235 /* Don't allow concurrent StoreData RPC's */
1236 if (scp->flags & CM_SCACHEFLAG_DATASTORING) {
1237 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is DATASTORING want STOREDATA_EXCL", scp);
1242 if (flags & CM_SCACHESYNC_ASYNCSTORE) {
1243 /* Don't allow more than one BKG store request */
1244 if (scp->flags & CM_SCACHEFLAG_ASYNCSTORING) {
1245 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is ASYNCSTORING want ASYNCSTORE", scp);
1250 if (flags & CM_SCACHESYNC_LOCK) {
1251 /* Don't allow concurrent fiddling with lock lists */
1252 if (scp->flags & CM_SCACHEFLAG_LOCKING) {
1253 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is LOCKING want LOCK", scp);
1258 /* now the operations that don't correspond to making RPCs */
1259 if (flags & CM_SCACHESYNC_GETSTATUS) {
1260 /* we can use the status that's here, if we're not
1261 * bringing in new status.
1263 if (scp->flags & (CM_SCACHEFLAG_FETCHING)) {
1264 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want GETSTATUS", scp);
1268 if (flags & CM_SCACHESYNC_SETSTATUS) {
1269 /* we can make a change to the local status, as long as
1270 * the status isn't changing now.
1272 * If we're fetching or storing a chunk of data, we can
1273 * change the status locally, since the fetch/store
1274 * operations don't change any of the data that we're
1277 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING |
1278 CM_SCACHEFLAG_SIZESETTING | CM_SCACHEFLAG_SIZESTORING)) {
1279 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING want SETSTATUS", scp);
1283 if (flags & CM_SCACHESYNC_READ) {
1284 /* we're going to read the data, make sure that the
1285 * status is available, and that the data is here. It
1286 * is OK to read while storing the data back.
1288 if (scp->flags & CM_SCACHEFLAG_FETCHING) {
1289 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want READ", scp);
1292 if (bufp && ((bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED)) == CM_BUF_CMFETCHING)) {
1293 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING want READ", scp, bufp);
1296 if (bufp && (bufp->cmFlags & CM_BUF_CMWRITING)) {
1297 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMWRITING want READ", scp, bufp);
1301 if (flags & CM_SCACHESYNC_WRITE) {
1302 /* don't write unless the status is stable and the chunk
1305 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESETTING |
1306 CM_SCACHEFLAG_SIZESTORING)) {
1307 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESETTING|SIZESTORING want WRITE", scp);
1310 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING |
1312 CM_BUF_CMWRITING))) {
1313 osi_Log3(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is %s want WRITE",
1315 ((bufp->cmFlags & CM_BUF_CMFETCHING) ? "CM_BUF_CMFETCHING":
1316 ((bufp->cmFlags & CM_BUF_CMSTORING) ? "CM_BUF_CMSTORING" :
1317 ((bufp->cmFlags & CM_BUF_CMWRITING) ? "CM_BUF_CMWRITING" :
1323 if ((flags & CM_SCACHESYNC_NEEDCALLBACK)) {
1324 if ((flags & CM_SCACHESYNC_FORCECB) || !cm_HaveCallback(scp)) {
1325 osi_Log1(afsd_logp, "CM SyncOp getting callback on scp 0x%p",
1328 lock_ReleaseMutex(&bufp->mx);
1329 code = cm_GetCallback(scp, userp, reqp, (flags & CM_SCACHESYNC_FORCECB)?1:0);
1331 lock_ReleaseWrite(&scp->rw);
1332 lock_ObtainMutex(&bufp->mx);
1333 lock_ObtainWrite(&scp->rw);
1337 flags &= ~CM_SCACHESYNC_FORCECB; /* only force once */
1343 /* can't check access rights without a callback */
1344 osi_assertx(flags & CM_SCACHESYNC_NEEDCALLBACK, "!CM_SCACHESYNC_NEEDCALLBACK");
1346 if ((rights & (PRSFS_WRITE|PRSFS_DELETE)) && (scp->flags & CM_SCACHEFLAG_RO))
1347 return CM_ERROR_READONLY;
1349 if (cm_HaveAccessRights(scp, userp, reqp, rights, &outRights)) {
1350 if (~outRights & rights)
1351 return CM_ERROR_NOACCESS;
1354 /* we don't know the required access rights */
1355 if (bufLocked) lock_ReleaseMutex(&bufp->mx);
1356 code = cm_GetAccessRights(scp, userp, reqp);
1358 lock_ReleaseWrite(&scp->rw);
1359 lock_ObtainMutex(&bufp->mx);
1360 lock_ObtainWrite(&scp->rw);
1368 if (flags & CM_SCACHESYNC_BULKREAD) {
1369 /* Don't allow concurrent fiddling with lock lists */
1370 if (scp->flags & CM_SCACHEFLAG_BULKREADING) {
1371 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is BULKREADING want BULKREAD", scp);
1376 /* if we get here, we're happy */
1380 /* first check if we're not supposed to wait: fail
1381 * in this case, returning with everything still locked.
1383 if (flags & CM_SCACHESYNC_NOWAIT)
1384 return CM_ERROR_WOULDBLOCK;
1386 /* These are used for minidump debugging */
1387 sleep_scp_flags = scp->flags; /* so we know why we slept */
1388 sleep_buf_cmflags = bufp ? bufp->cmFlags : 0;
1389 sleep_scp_bufs = (scp->bufReadsp ? 1 : 0) | (scp->bufWritesp ? 2 : 0);
1391 /* wait here, then try again */
1392 osi_Log1(afsd_logp, "CM SyncOp sleeping scp 0x%p", scp);
1393 if ( scp->flags & CM_SCACHEFLAG_WAITING ) {
1395 scp->waitRequests++;
1396 osi_Log3(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING already set for 0x%p; %d threads; %d requests",
1397 scp, scp->waitCount, scp->waitRequests);
1399 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING set for 0x%p", scp);
1400 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_WAITING);
1401 scp->waitCount = scp->waitRequests = 1;
1404 cm_SyncOpAddToWaitQueue(scp, flags, bufp);
1408 lock_ReleaseMutex(&bufp->mx);
1409 osi_SleepW((LONG_PTR) &scp->flags, &scp->rw);
1411 lock_ObtainMutex(&bufp->mx);
1412 lock_ObtainWrite(&scp->rw);
1413 } while (!cm_SyncOpCheckContinue(scp, flags, bufp));
1415 cm_UpdateServerPriority();
1418 osi_Log3(afsd_logp, "CM SyncOp woke! scp 0x%p; still waiting %d threads of %d requests",
1419 scp, scp->waitCount, scp->waitRequests);
1420 if (scp->waitCount == 0) {
1421 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING reset for 0x%p", scp);
1422 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_WAITING);
1423 scp->waitRequests = 0;
1425 } /* big while loop */
1427 /* now, update the recorded state for RPC-type calls */
1428 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1429 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_FETCHING);
1430 if (flags & CM_SCACHESYNC_STORESTATUS)
1431 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_STORING);
1432 if (flags & CM_SCACHESYNC_SETSIZE)
1433 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_SIZESETTING);
1434 if (flags & CM_SCACHESYNC_STORESIZE)
1435 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_SIZESTORING);
1436 if (flags & CM_SCACHESYNC_GETCALLBACK)
1437 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_GETCALLBACK);
1438 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1439 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_DATASTORING);
1440 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1441 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_ASYNCSTORING);
1442 if (flags & CM_SCACHESYNC_LOCK)
1443 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_LOCKING);
1444 if (flags & CM_SCACHESYNC_BULKREAD)
1445 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_BULKREADING);
1447 /* now update the buffer pointer */
1448 if (bufp && (flags & CM_SCACHESYNC_FETCHDATA)) {
1449 /* ensure that the buffer isn't already in the I/O list */
1450 for (qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1451 tbufp = osi_GetQData(qdp);
1452 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1455 /* queue a held reference to the buffer in the "reading" I/O list */
1456 qdp = osi_QDAlloc();
1457 osi_SetQData(qdp, bufp);
1460 _InterlockedOr(&bufp->cmFlags, CM_BUF_CMFETCHING);
1461 osi_QAdd((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1464 if (bufp && (flags & CM_SCACHESYNC_STOREDATA)) {
1465 osi_assertx(scp->fileType == CM_SCACHETYPE_FILE,
1466 "attempting to store extents on a non-file object");
1468 /* ensure that the buffer isn't already in the I/O list */
1469 for (qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1470 tbufp = osi_GetQData(qdp);
1471 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1474 /* queue a held reference to the buffer in the "writing" I/O list */
1475 qdp = osi_QDAlloc();
1476 osi_SetQData(qdp, bufp);
1478 _InterlockedOr(&bufp->cmFlags, CM_BUF_CMSTORING);
1479 osi_QAdd((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1482 if (bufp && (flags & CM_SCACHESYNC_WRITE)) {
1483 /* mark the buffer as being written to. */
1484 _InterlockedOr(&bufp->cmFlags, CM_BUF_CMWRITING);
1490 /* for those syncops that setup for RPCs.
1491 * Called with scache locked.
1493 void cm_SyncOpDone(cm_scache_t *scp, cm_buf_t *bufp, afs_uint32 flags)
1495 osi_queueData_t *qdp;
1498 lock_AssertWrite(&scp->rw);
1500 /* now, update the recorded state for RPC-type calls */
1501 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1502 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_FETCHING);
1503 if (flags & CM_SCACHESYNC_STORESTATUS)
1504 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_STORING);
1505 if (flags & CM_SCACHESYNC_SETSIZE)
1506 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_SIZESETTING);
1507 if (flags & CM_SCACHESYNC_STORESIZE)
1508 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_SIZESTORING);
1509 if (flags & CM_SCACHESYNC_GETCALLBACK)
1510 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_GETCALLBACK);
1511 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1512 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_DATASTORING);
1513 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1514 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_ASYNCSTORING);
1515 if (flags & CM_SCACHESYNC_LOCK)
1516 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_LOCKING);
1517 if (flags & CM_SCACHESYNC_BULKREAD)
1518 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_BULKREADING);
1520 /* now update the buffer pointer */
1521 if (bufp && (flags & CM_SCACHESYNC_FETCHDATA)) {
1524 /* ensure that the buffer is in the I/O list */
1525 for (qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1526 tbufp = osi_GetQData(qdp);
1531 osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1535 _InterlockedAnd(&bufp->cmFlags, ~(CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED));
1536 if (bufp->flags & CM_BUF_WAITING) {
1537 osi_Log2(afsd_logp, "CM SyncOpDone FetchData Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1538 osi_Wakeup((LONG_PTR) &bufp);
1544 /* now update the buffer pointer */
1545 if (bufp && (flags & CM_SCACHESYNC_STOREDATA)) {
1547 /* ensure that the buffer is in the I/O list */
1548 for (qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1549 tbufp = osi_GetQData(qdp);
1554 osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1558 _InterlockedAnd(&bufp->cmFlags, ~CM_BUF_CMSTORING);
1559 if (bufp->flags & CM_BUF_WAITING) {
1560 osi_Log2(afsd_logp, "CM SyncOpDone StoreData Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1561 osi_Wakeup((LONG_PTR) &bufp);
1567 if (bufp && (flags & CM_SCACHESYNC_WRITE)) {
1568 osi_assertx(bufp->cmFlags & CM_BUF_CMWRITING, "!CM_BUF_CMWRITING");
1569 _InterlockedAnd(&bufp->cmFlags, ~CM_BUF_CMWRITING);
1572 /* and wakeup anyone who is waiting */
1573 if (scp->flags & CM_SCACHEFLAG_WAITING) {
1574 osi_Log3(afsd_logp, "CM SyncOpDone 0x%x Waking scp 0x%p bufp 0x%p", flags, scp, bufp);
1575 osi_Wakeup((LONG_PTR) &scp->flags);
1580 dv_diff(afs_uint64 dv1, afs_uint64 dv2)
1582 if ( dv1 - dv2 > 0x7FFFFFFF )
1583 return (afs_uint32)(dv2 - dv1);
1585 return (afs_uint32)(dv1 - dv2);
1588 /* merge in a response from an RPC. The scp must be locked, and the callback
1591 * Don't overwrite any status info that is dirty, since we could have a store
1592 * operation (such as store data) that merges some info in, and we don't want
1593 * to lose the local updates. Typically, there aren't many updates we do
1594 * locally, anyway, probably only mtime.
1596 * There is probably a bug in here where a chmod (which doesn't change
1597 * serverModTime) that occurs between two fetches, both of whose responses are
1598 * handled after the callback breaking is done, but only one of whose calls
1599 * started before that, can cause old info to be merged from the first call.
1601 void cm_MergeStatus(cm_scache_t *dscp,
1602 cm_scache_t *scp, AFSFetchStatus *statusp,
1603 AFSVolSync *volsyncp,
1604 cm_user_t *userp, cm_req_t *reqp, afs_uint32 flags)
1606 afs_uint64 dataVersion;
1607 struct cm_volume *volp = NULL;
1608 struct cm_cell *cellp = NULL;
1609 int rdr_invalidate = 0;
1610 afs_uint32 activeRPCs;
1612 lock_AssertWrite(&scp->rw);
1614 activeRPCs = 1 + InterlockedDecrement(&scp->activeRPCs);
1616 // yj: i want to create some fake status for the /afs directory and the
1617 // entries under that directory
1618 #ifdef AFS_FREELANCE_CLIENT
1619 if (cm_freelanceEnabled && scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1620 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1621 if (scp == cm_data.rootSCachep) {
1622 osi_Log0(afsd_logp,"cm_MergeStatus Freelance cm_data.rootSCachep");
1623 statusp->FileType = CM_SCACHETYPE_DIRECTORY;
1624 statusp->Length = cm_fakeDirSize;
1625 statusp->Length_hi = 0;
1627 statusp->FileType = scp->fileType;
1628 statusp->Length = scp->length.LowPart;
1629 statusp->Length_hi = scp->length.HighPart;
1631 statusp->InterfaceVersion = 0x1;
1632 statusp->LinkCount = scp->linkCount;
1633 statusp->DataVersion = (afs_uint32)(cm_data.fakeDirVersion & 0xFFFFFFFF);
1634 statusp->Author = 0x1;
1635 statusp->Owner = 0x0;
1636 statusp->CallerAccess = 0x9;
1637 statusp->AnonymousAccess = 0x9;
1638 statusp->UnixModeBits = 0777;
1639 statusp->ParentVnode = 0x1;
1640 statusp->ParentUnique = 0x1;
1641 statusp->ResidencyMask = 0;
1642 statusp->ClientModTime = FakeFreelanceModTime;
1643 statusp->ServerModTime = FakeFreelanceModTime;
1645 statusp->SyncCounter = 0;
1646 statusp->dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
1647 statusp->lockCount = 0;
1648 statusp->errorCode = 0;
1650 #endif /* AFS_FREELANCE_CLIENT */
1652 if (statusp->errorCode != 0) {
1653 switch (statusp->errorCode) {
1658 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_EACCESS);
1660 osi_Log2(afsd_logp, "Merge, Failure scp 0x%p code 0x%x", scp, statusp->errorCode);
1662 if (scp->fid.vnode & 0x1)
1663 scp->fileType = CM_SCACHETYPE_DIRECTORY;
1665 scp->fileType = 0; /* unknown */
1667 scp->serverModTime = 0;
1668 scp->clientModTime = 0;
1669 scp->length.LowPart = 0;
1670 scp->length.HighPart = 0;
1671 scp->serverLength.LowPart = 0;
1672 scp->serverLength.HighPart = 0;
1676 scp->unixModeBits = 0;
1678 scp->dataVersion = CM_SCACHE_VERSION_BAD;
1679 scp->bufDataVersionLow = CM_SCACHE_VERSION_BAD;
1680 scp->fsLockCount = 0;
1682 if (dscp && dscp != scp) {
1683 scp->parentVnode = dscp->fid.vnode;
1684 scp->parentUnique = dscp->fid.unique;
1686 scp->parentVnode = 0;
1687 scp->parentUnique = 0;
1690 if (RDR_Initialized)
1693 _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_EACCESS);
1696 dataVersion = statusp->dataVersionHigh;
1698 dataVersion |= statusp->DataVersion;
1700 if (!(flags & CM_MERGEFLAG_FORCE) &&
1701 dataVersion < scp->dataVersion &&
1702 scp->dataVersion != CM_SCACHE_VERSION_BAD) {
1704 cellp = cm_FindCellByID(scp->fid.cell, 0);
1705 if (scp->cbServerp) {
1706 cm_FindVolumeByID(cellp, scp->fid.volume, userp,
1707 reqp, CM_GETVOL_FLAG_CREATE, &volp);
1708 osi_Log2(afsd_logp, "old data from server %x volume %s",
1709 scp->cbServerp->addr.sin_addr.s_addr,
1710 volp ? volp->namep : "(unknown)");
1713 osi_Log3(afsd_logp, "Bad merge, scp 0x%p, scp dv %d, RPC dv %d",
1714 scp, scp->dataVersion, dataVersion);
1715 /* we have a number of data fetch/store operations running
1716 * concurrently, and we can tell which one executed last at the
1717 * server by its mtime.
1718 * Choose the one with the largest mtime, and ignore the rest.
1720 * These concurrent calls are incompatible with setting the
1721 * mtime, so we won't have a locally changed mtime here.
1723 * We could also have ACL info for a different user than usual,
1724 * in which case we have to do that part of the merge, anyway.
1725 * We won't have to worry about the info being old, since we
1726 * won't have concurrent calls
1727 * that change file status running from this machine.
1729 * Added 3/17/98: if we see data version regression on an RO
1730 * file, it's probably due to a server holding an out-of-date
1731 * replica, rather than to concurrent RPC's. Failures to
1732 * release replicas are now flagged by the volserver, but only
1733 * since AFS 3.4 5.22, so there are plenty of clients getting
1734 * out-of-date replicas out there.
1736 * If we discover an out-of-date replica, by this time it's too
1737 * late to go to another server and retry. Also, we can't
1738 * reject the merge, because then there is no way for
1739 * GetAccess to do its work, and the caller gets into an
1740 * infinite loop. So we just grin and bear it.
1742 if (!(scp->flags & CM_SCACHEFLAG_RO))
1746 if (cm_readonlyVolumeVersioning)
1747 scp->volumeCreationDate = volsyncp->spare1; /* volume creation date */
1749 scp->serverModTime = statusp->ServerModTime;
1751 if (!(scp->mask & CM_SCACHEMASK_CLIENTMODTIME)) {
1752 scp->clientModTime = statusp->ClientModTime;
1754 if (!(scp->mask & CM_SCACHEMASK_LENGTH)) {
1755 scp->length.LowPart = statusp->Length;
1756 scp->length.HighPart = statusp->Length_hi;
1759 scp->serverLength.LowPart = statusp->Length;
1760 scp->serverLength.HighPart = statusp->Length_hi;
1762 scp->linkCount = statusp->LinkCount;
1763 scp->owner = statusp->Owner;
1764 scp->group = statusp->Group;
1765 scp->unixModeBits = statusp->UnixModeBits & 07777;
1767 if (statusp->FileType == File)
1768 scp->fileType = CM_SCACHETYPE_FILE;
1769 else if (statusp->FileType == Directory)
1770 scp->fileType = CM_SCACHETYPE_DIRECTORY;
1771 else if (statusp->FileType == SymbolicLink) {
1772 if ((scp->unixModeBits & 0111) == 0)
1773 scp->fileType = CM_SCACHETYPE_MOUNTPOINT;
1775 scp->fileType = CM_SCACHETYPE_SYMLINK;
1778 osi_Log2(afsd_logp, "Merge, Invalid File Type (%d), scp 0x%p", statusp->FileType, scp);
1779 scp->fileType = CM_SCACHETYPE_INVALID; /* invalid */
1781 /* and other stuff */
1782 scp->parentVnode = statusp->ParentVnode;
1783 scp->parentUnique = statusp->ParentUnique;
1785 /* -1 is a write lock; any positive values are read locks */
1786 scp->fsLockCount = (afs_int32)statusp->lockCount;
1788 /* and merge in the private acl cache info, if this is more than the public
1789 * info; merge in the public stuff in any case.
1791 scp->anyAccess = statusp->AnonymousAccess;
1793 if (userp != NULL) {
1794 cm_AddACLCache(scp, userp, statusp->CallerAccess);
1797 if (dataVersion != 0 && scp->dataVersion != CM_SCACHE_VERSION_BAD &&
1798 (!(flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && (dataVersion != scp->dataVersion) ||
1799 (flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) &&
1800 (dv_diff(dataVersion, scp->dataVersion) > activeRPCs))) {
1802 * We now know that all of the data buffers that we have associated
1803 * with this scp are invalid. Subsequent operations will go faster
1804 * if the buffers are removed from the hash tables.
1806 * We do not remove directory buffers if the dataVersion delta is 'activeRPCs' because
1807 * those version numbers will be updated as part of the directory operation.
1809 * We do not remove storedata buffers because they will still be valid.
1814 cm_buf_t *bp, *prevBp, *nextBp;
1816 lock_ObtainWrite(&buf_globalLock);
1817 i = BUF_FILEHASH(&scp->fid);
1818 for (bp = cm_data.buf_fileHashTablepp[i]; bp; bp=nextBp)
1820 nextBp = bp->fileHashp;
1822 * if the buffer belongs to this stat cache entry
1823 * and the buffer mutex can be obtained, check the
1824 * reference count and if it is zero, remove the buffer
1825 * from the hash tables. If there are references,
1826 * the buffer might be updated to the current version
1827 * so leave it in place.
1829 if (cm_FidCmp(&scp->fid, &bp->fid) == 0 &&
1830 lock_TryMutex(&bp->mx)) {
1831 if (bp->refCount == 0 &&
1832 !(bp->flags & (CM_BUF_READING | CM_BUF_WRITING | CM_BUF_DIRTY)) &&
1833 !(bp->qFlags & CM_BUF_QREDIR)) {
1834 prevBp = bp->fileHashBackp;
1835 bp->fileHashBackp = bp->fileHashp = NULL;
1837 prevBp->fileHashp = nextBp;
1839 cm_data.buf_fileHashTablepp[i] = nextBp;
1841 nextBp->fileHashBackp = prevBp;
1843 j = BUF_HASH(&bp->fid, &bp->offset);
1844 lbpp = &(cm_data.buf_scacheHashTablepp[j]);
1845 for(tbp = *lbpp; tbp; lbpp = &tbp->hashp, tbp = tbp->hashp) {
1850 /* we better find it */
1851 osi_assertx(tbp != NULL, "cm_MergeStatus: buf_scacheHashTablepp table screwup");
1853 *lbpp = bp->hashp; /* hash out */
1856 _InterlockedAnd(&bp->qFlags, ~CM_BUF_QINHASH);
1858 lock_ReleaseMutex(&bp->mx);
1861 lock_ReleaseWrite(&buf_globalLock);
1865 * If the dataVersion has changed, the mountPointStringp must be cleared
1866 * in order to force a re-evaluation by cm_HandleLink(). The Windows CM
1867 * does not update a mountpoint or symlink by altering the contents of
1868 * the file data; but the Unix CM does.
1870 if (scp->dataVersion != dataVersion && !(flags & CM_MERGEFLAG_FETCHDATA)) {
1871 scp->mountPointStringp[0] = '\0';
1873 osi_Log5(afsd_logp, "cm_MergeStatus data version change scp 0x%p cell %u vol %u vn %u uniq %u",
1874 scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1876 osi_Log4(afsd_logp, ".... oldDV 0x%x:%x -> newDV 0x%x:%x",
1877 (afs_uint32)((scp->dataVersion >> 32) & 0xFFFFFFFF),
1878 (afs_uint32)(scp->dataVersion & 0xFFFFFFFF),
1879 (afs_uint32)((dataVersion >> 32) & 0xFFFFFFFF),
1880 (afs_uint32)(dataVersion & 0xFFFFFFFF));
1883 /* We maintain a range of buffer dataVersion values which are considered
1884 * valid. This avoids the need to update the dataVersion on each buffer
1885 * object during an uncontested storeData operation. As a result this
1886 * merge status no longer has performance characteristics derived from
1887 * the size of the file.
1889 * For directory buffers, only current dataVersion values are up to date.
1891 if (((flags & (CM_MERGEFLAG_STOREDATA|CM_MERGEFLAG_DIROP)) && (dv_diff(dataVersion, scp->dataVersion) > activeRPCs)) ||
1892 (!(flags & (CM_MERGEFLAG_STOREDATA|CM_MERGEFLAG_DIROP)) && (scp->dataVersion != dataVersion)) ||
1893 scp->bufDataVersionLow == CM_SCACHE_VERSION_BAD ||
1894 scp->fileType == CM_SCACHETYPE_DIRECTORY)
1895 scp->bufDataVersionLow = dataVersion;
1897 if (RDR_Initialized) {
1899 * The redirector maintains its own cached status information which
1900 * must be updated when a DV change occurs that is not the result
1901 * of a redirector initiated data change.
1903 * If the current old DV is BAD, send a DV change notification.
1905 * If the DV has changed and request was not initiated by the
1906 * redirector, send a DV change notification.
1908 * If the request was initiated by the redirector, send a notification
1909 * for store and directory operations that result in a DV change greater
1910 * than the number of active RPCs or any other operation that results
1911 * in an unexpected DV change such as FetchStatus.
1914 if (scp->dataVersion == CM_SCACHE_VERSION_BAD && dataVersion != 0) {
1916 } else if (!(reqp->flags & CM_REQ_SOURCE_REDIR) && scp->dataVersion != dataVersion) {
1918 } else if (reqp->flags & CM_REQ_SOURCE_REDIR) {
1919 if (!(flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) &&
1920 (dv_diff(dataVersion, scp->dataVersion) > activeRPCs - 1)) {
1922 } else if ((flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) &&
1923 dv_diff(dataVersion, scp->dataVersion) > activeRPCs) {
1928 scp->dataVersion = dataVersion;
1931 * If someone is waiting for status information, we can wake them up
1932 * now even though the entity that issued the FetchStatus may not
1933 * have completed yet.
1935 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS);
1938 * We just successfully merged status on the stat cache object.
1939 * This means that the associated volume must be online.
1943 cellp = cm_FindCellByID(scp->fid.cell, 0);
1944 cm_FindVolumeByID(cellp, scp->fid.volume, userp, reqp, 0, &volp);
1947 cm_vol_state_t *statep = cm_VolumeStateByID(volp, scp->fid.volume);
1948 if (statep->state != vl_online) {
1949 lock_ObtainWrite(&volp->rw);
1950 cm_VolumeStatusNotification(volp, statep->ID, statep->state, vl_online);
1951 statep->state = vl_online;
1952 lock_ReleaseWrite(&volp->rw);
1961 * The scache rw lock cannot be held across the invalidation.
1962 * Doing so can result in deadlocks with other threads processing
1963 * requests initiated by the afs redirector.
1965 if (rdr_invalidate) {
1966 lock_ReleaseWrite(&scp->rw);
1967 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
1968 scp->fid.unique, scp->fid.hash,
1969 scp->fileType, AFS_INVALIDATE_DATA_VERSION);
1970 lock_ObtainWrite(&scp->rw);
1974 /* note that our stat cache info is incorrect, so force us eventually
1975 * to stat the file again. There may be dirty data associated with
1976 * this vnode, and we want to preserve that information.
1978 * This function works by simply simulating a loss of the callback.
1980 * This function must be called with the scache locked.
1982 void cm_DiscardSCache(cm_scache_t *scp)
1984 lock_AssertWrite(&scp->rw);
1985 if (scp->cbServerp) {
1986 cm_PutServer(scp->cbServerp);
1987 scp->cbServerp = NULL;
1991 scp->volumeCreationDate = 0;
1992 _InterlockedAnd(&scp->flags, ~(CM_SCACHEFLAG_CALLBACK | CM_SCACHEFLAG_LOCAL | CM_SCACHEFLAG_RDR_IN_USE));
1993 cm_dnlcPurgedp(scp);
1994 cm_dnlcPurgevp(scp);
1995 cm_FreeAllACLEnts(scp);
1997 if (scp->fileType == CM_SCACHETYPE_DFSLINK)
1998 cm_VolStatus_Invalidate_DFS_Mapping(scp);
2000 /* Force mount points and symlinks to be re-evaluated */
2001 scp->mountPointStringp[0] = '\0';
2004 void cm_AFSFidFromFid(AFSFid *afsFidp, cm_fid_t *fidp)
2006 afsFidp->Volume = fidp->volume;
2007 afsFidp->Vnode = fidp->vnode;
2008 afsFidp->Unique = fidp->unique;
2011 #ifdef DEBUG_REFCOUNT
2012 void cm_HoldSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
2014 void cm_HoldSCacheNoLock(cm_scache_t *scp)
2019 osi_assertx(scp != NULL, "null cm_scache_t");
2020 lock_AssertAny(&cm_scacheLock);
2021 refCount = InterlockedIncrement(&scp->refCount);
2022 #ifdef DEBUG_REFCOUNT
2023 osi_Log2(afsd_logp,"cm_HoldSCacheNoLock scp 0x%p ref %d",scp, refCount);
2024 afsi_log("%s:%d cm_HoldSCacheNoLock scp 0x%p, ref %d", file, line, scp, refCount);
2028 #ifdef DEBUG_REFCOUNT
2029 void cm_HoldSCacheDbg(cm_scache_t *scp, char * file, long line)
2031 void cm_HoldSCache(cm_scache_t *scp)
2036 osi_assertx(scp != NULL, "null cm_scache_t");
2037 lock_ObtainRead(&cm_scacheLock);
2038 refCount = InterlockedIncrement(&scp->refCount);
2039 #ifdef DEBUG_REFCOUNT
2040 osi_Log2(afsd_logp,"cm_HoldSCache scp 0x%p ref %d",scp, refCount);
2041 afsi_log("%s:%d cm_HoldSCache scp 0x%p ref %d", file, line, scp, refCount);
2043 lock_ReleaseRead(&cm_scacheLock);
2046 #ifdef DEBUG_REFCOUNT
2047 void cm_ReleaseSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
2049 void cm_ReleaseSCacheNoLock(cm_scache_t *scp)
2054 osi_assertx(scp != NULL, "null cm_scache_t");
2055 lock_AssertAny(&cm_scacheLock);
2057 refCount = InterlockedDecrement(&scp->refCount);
2058 #ifdef DEBUG_REFCOUNT
2060 osi_Log1(afsd_logp,"cm_ReleaseSCacheNoLock about to panic scp 0x%x",scp);
2062 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
2063 #ifdef DEBUG_REFCOUNT
2064 osi_Log2(afsd_logp,"cm_ReleaseSCacheNoLock scp 0x%p ref %d",scp, refCount);
2065 afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, refCount);
2068 if (refCount == 0 && (scp->flags & CM_SCACHEFLAG_DELETED)) {
2072 lockstate = lock_GetRWLockState(&cm_scacheLock);
2073 if (lockstate != OSI_RWLOCK_WRITEHELD)
2074 lock_ReleaseRead(&cm_scacheLock);
2076 lock_ReleaseWrite(&cm_scacheLock);
2078 lock_ObtainWrite(&scp->rw);
2079 if (scp->flags & CM_SCACHEFLAG_DELETED)
2082 if (refCount == 0 && deleted) {
2083 lock_ObtainWrite(&cm_scacheLock);
2084 cm_RecycleSCache(scp, 0);
2085 if (lockstate != OSI_RWLOCK_WRITEHELD)
2086 lock_ConvertWToR(&cm_scacheLock);
2088 if (lockstate != OSI_RWLOCK_WRITEHELD)
2089 lock_ObtainRead(&cm_scacheLock);
2091 lock_ObtainWrite(&cm_scacheLock);
2093 lock_ReleaseWrite(&scp->rw);
2097 #ifdef DEBUG_REFCOUNT
2098 void cm_ReleaseSCacheDbg(cm_scache_t *scp, char * file, long line)
2100 void cm_ReleaseSCache(cm_scache_t *scp)
2105 osi_assertx(scp != NULL, "null cm_scache_t");
2106 lock_ObtainRead(&cm_scacheLock);
2107 refCount = InterlockedDecrement(&scp->refCount);
2108 #ifdef DEBUG_REFCOUNT
2110 osi_Log1(afsd_logp,"cm_ReleaseSCache about to panic scp 0x%x",scp);
2112 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
2113 #ifdef DEBUG_REFCOUNT
2114 osi_Log2(afsd_logp,"cm_ReleaseSCache scp 0x%p ref %d",scp, refCount);
2115 afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, refCount);
2117 lock_ReleaseRead(&cm_scacheLock);
2119 if (scp->flags & CM_SCACHEFLAG_DELETED) {
2121 lock_ObtainWrite(&scp->rw);
2122 if (scp->flags & CM_SCACHEFLAG_DELETED)
2125 lock_ObtainWrite(&cm_scacheLock);
2126 cm_RecycleSCache(scp, 0);
2127 lock_ReleaseWrite(&cm_scacheLock);
2129 lock_ReleaseWrite(&scp->rw);
2133 /* just look for the scp entry to get filetype */
2134 /* doesn't need to be perfectly accurate, so locking doesn't matter too much */
2135 int cm_FindFileType(cm_fid_t *fidp)
2140 hash = CM_SCACHE_HASH(fidp);
2142 osi_assertx(fidp->cell != 0, "unassigned cell value");
2144 lock_ObtainWrite(&cm_scacheLock);
2145 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
2146 if (cm_FidCmp(fidp, &scp->fid) == 0) {
2147 lock_ReleaseWrite(&cm_scacheLock);
2148 return scp->fileType;
2151 lock_ReleaseWrite(&cm_scacheLock);
2155 /* dump all scp's that have reference count > 0 to a file.
2156 * cookie is used to identify this batch for easy parsing,
2157 * and it a string provided by a caller
2159 int cm_DumpSCache(FILE *outputFile, char *cookie, int lock)
2168 lock_ObtainRead(&cm_scacheLock);
2170 sprintf(output, "%s - dumping all scache - cm_data.currentSCaches=%d, cm_data.maxSCaches=%d\r\n", cookie, cm_data.currentSCaches, cm_data.maxSCaches);
2171 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2173 for (scp = cm_data.allSCachesp; scp; scp = scp->allNextp)
2176 char *srvStr = NULL;
2177 afs_uint32 srvStrRpc = TRUE;
2181 if (scp->cbServerp) {
2182 if (!((scp->cbServerp->flags & CM_SERVERFLAG_UUID) &&
2183 UuidToString((UUID *)&scp->cbServerp->uuid, &srvStr) == RPC_S_OK)) {
2184 srvStr = malloc(16); /* enough for 255.255.255.255 */
2186 afs_inet_ntoa_r(scp->cbServerp->addr.sin_addr.s_addr, srvStr);
2190 if (scp->cbExpires) {
2195 cbt[strlen(cbt)-1] = '\0';
2198 if (scp->volumeCreationDate) {
2199 t = scp->volumeCreationDate;
2202 cdrot = strdup(cdrot);
2203 cdrot[strlen(cdrot)-1] = '\0';
2207 "%s scp=0x%p, fid (cell=%d, volume=%d, vnode=%d, unique=%d) type=%d dv=%I64d len=0x%I64x "
2208 "mp='%s' Locks (server=0x%x shared=%d excl=%d clnt=%d) fsLockCount=%d linkCount=%d anyAccess=0x%x "
2209 "flags=0x%x cbServer='%s' cbExpires='%s' volumeCreationDate='%s' refCount=%u\r\n",
2210 cookie, scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
2211 scp->fileType, scp->dataVersion, scp->length.QuadPart, scp->mountPointStringp,
2212 scp->serverLock, scp->sharedLocks, scp->exclusiveLocks, scp->clientLocks, scp->fsLockCount,
2213 scp->linkCount, scp->anyAccess, scp->flags, srvStr ? srvStr : "<none>", cbt ? cbt : "<none>",
2214 cdrot ? cdrot : "<none>", scp->refCount);
2215 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2217 if (scp->fileLocksH) {
2218 sprintf(output, " %s - begin dumping scp locks\r\n", cookie);
2219 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2221 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
2222 cm_file_lock_t * lockp = fileq_to_cm_file_lock_t(q);
2223 sprintf(output, " %s lockp=0x%p scp=0x%p, cm_userp=0x%p offset=0x%I64x len=0x%08I64x type=0x%x "
2224 "key=0x%I64x flags=0x%x update=0x%I64u\r\n",
2225 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
2226 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
2227 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2230 sprintf(output, " %s - done dumping scp locks\r\n", cookie);
2231 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2236 RpcStringFree(&srvStr);
2246 sprintf(output, "%s - Done dumping all scache.\r\n", cookie);
2247 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2248 sprintf(output, "%s - dumping cm_data.scacheHashTable - cm_data.scacheHashTableSize=%d\r\n",
2249 cookie, cm_data.scacheHashTableSize);
2250 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2252 for (i = 0; i < cm_data.scacheHashTableSize; i++)
2254 for(scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp)
2256 sprintf(output, "%s scp=0x%p, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d)\r\n",
2257 cookie, scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
2258 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2262 sprintf(output, "%s - Done dumping cm_data.scacheHashTable\r\n", cookie);
2263 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2265 sprintf(output, "%s - begin dumping all file locks\r\n", cookie);
2266 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2268 for (q = cm_allFileLocks; q; q = osi_QNext(q)) {
2269 cm_file_lock_t * lockp = (cm_file_lock_t *)q;
2270 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",
2271 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
2272 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
2273 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2276 sprintf(output, "%s - done dumping all file locks\r\n", cookie);
2277 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
2280 lock_ReleaseRead(&cm_scacheLock);