2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afs/param.h>
24 /*extern void afsi_log(char *pattern, ...);*/
26 extern osi_hyper_t hzero;
29 osi_queue_t *cm_allFileLocks;
30 osi_queue_t *cm_freeFileLocks;
31 unsigned long cm_lockRefreshCycle;
33 /* lock for globals */
34 osi_rwlock_t cm_scacheLock;
36 /* Dummy scache entry for use with pioctl fids */
37 cm_scache_t cm_fakeSCache;
39 osi_queue_t * cm_allFreeWaiters; /* protected by cm_scacheLock */
41 #ifdef AFS_FREELANCE_CLIENT
42 extern osi_mutex_t cm_Freelance_Lock;
45 /* must be called with cm_scacheLock write-locked! */
46 void cm_AdjustScacheLRU(cm_scache_t *scp)
48 lock_AssertWrite(&cm_scacheLock);
49 osi_QRemoveHT((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
50 osi_QAddH((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
53 /* call with cm_scacheLock write-locked and scp rw held */
54 void cm_RemoveSCacheFromHashTable(cm_scache_t *scp)
60 lock_AssertWrite(&cm_scacheLock);
61 lock_AssertWrite(&scp->rw);
62 if (scp->flags & CM_SCACHEFLAG_INHASH) {
63 /* hash it out first */
64 i = CM_SCACHE_HASH(&scp->fid);
65 for (lscpp = &cm_data.scacheHashTablep[i], tscp = cm_data.scacheHashTablep[i];
67 lscpp = &tscp->nextp, tscp = tscp->nextp) {
71 scp->flags &= ~CM_SCACHEFLAG_INHASH;
78 /* called with cm_scacheLock and scp write-locked; recycles an existing scp.
80 * this function ignores all of the locking hierarchy.
82 long cm_RecycleSCache(cm_scache_t *scp, afs_int32 flags)
84 if (scp->refCount != 0) {
88 if (scp->flags & CM_SCACHEFLAG_SMB_FID) {
89 osi_Log1(afsd_logp,"cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected scp 0x%p", scp);
91 osi_panic("cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected",__FILE__,__LINE__);
96 cm_RemoveSCacheFromHashTable(scp);
99 if (flags & CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS) {
100 osi_queueData_t *qdp;
103 while(qdp = scp->bufWritesp) {
104 bufp = osi_GetQData(qdp);
105 osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
108 lock_ObtainMutex(&bufp->mx);
109 bufp->cmFlags &= ~CM_BUF_CMSTORING;
110 bufp->flags &= ~CM_BUF_DIRTY;
111 bufp->dirty_offset = 0;
112 bufp->dirty_length = 0;
113 bufp->flags |= CM_BUF_ERROR;
114 bufp->error = VNOVNODE;
115 bufp->dataVersion = -1; /* bad */
116 bufp->dirtyCounter++;
117 if (bufp->flags & CM_BUF_WAITING) {
118 osi_Log2(afsd_logp, "CM RecycleSCache Waking [scp 0x%x] bufp 0x%x", scp, bufp);
119 osi_Wakeup((long) &bufp);
121 lock_ReleaseMutex(&bufp->mx);
125 while(qdp = scp->bufReadsp) {
126 bufp = osi_GetQData(qdp);
127 osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
130 lock_ObtainMutex(&bufp->mx);
131 bufp->cmFlags &= ~CM_BUF_CMFETCHING;
132 bufp->flags &= ~CM_BUF_DIRTY;
133 bufp->dirty_offset = 0;
134 bufp->dirty_length = 0;
135 bufp->flags |= CM_BUF_ERROR;
136 bufp->error = VNOVNODE;
137 bufp->dataVersion = -1; /* bad */
138 bufp->dirtyCounter++;
139 if (bufp->flags & CM_BUF_WAITING) {
140 osi_Log2(afsd_logp, "CM RecycleSCache Waking [scp 0x%x] bufp 0x%x", scp, bufp);
141 osi_Wakeup((long) &bufp);
143 lock_ReleaseMutex(&bufp->mx);
147 buf_CleanDirtyBuffers(scp);
149 /* look for things that shouldn't still be set */
150 osi_assertx(scp->bufWritesp == NULL, "non-null cm_scache_t bufWritesp");
151 osi_assertx(scp->bufReadsp == NULL, "non-null cm_scache_t bufReadsp");
155 /* invalidate so next merge works fine;
156 * also initialize some flags */
158 scp->flags &= ~(CM_SCACHEFLAG_STATD
159 | CM_SCACHEFLAG_DELETED
161 | CM_SCACHEFLAG_PURERO
162 | CM_SCACHEFLAG_OVERQUOTA
163 | CM_SCACHEFLAG_OUTOFSPACE
164 | CM_SCACHEFLAG_EACCESS);
165 scp->serverModTime = 0;
166 scp->dataVersion = 0;
167 scp->bufDataVersionLow = 0;
168 scp->bulkStatProgress = hzero;
170 scp->waitQueueT = NULL;
172 if (scp->cbServerp) {
173 cm_PutServer(scp->cbServerp);
174 scp->cbServerp = NULL;
184 /* remove from dnlc */
188 /* discard cached status; if non-zero, Close
189 * tried to store this to server but failed */
192 /* discard symlink info */
193 scp->mountPointStringp[0] = '\0';
194 memset(&scp->mountRootFid, 0, sizeof(cm_fid_t));
195 memset(&scp->dotdotFid, 0, sizeof(cm_fid_t));
197 /* reset locking info */
198 scp->fileLocksH = NULL;
199 scp->fileLocksT = NULL;
200 scp->serverLock = (-1);
201 scp->exclusiveLocks = 0;
202 scp->sharedLocks = 0;
203 scp->lockDataVersion = -1;
205 /* not locked, but there can be no references to this guy
206 * while we hold the global refcount lock.
208 cm_FreeAllACLEnts(scp);
211 /* destroy directory Bplus Tree */
213 LARGE_INTEGER start, end;
214 QueryPerformanceCounter(&start);
216 freeBtree(scp->dirBplus);
217 scp->dirBplus = NULL;
218 QueryPerformanceCounter(&end);
220 bplus_free_time += (end.QuadPart - start.QuadPart);
228 * called with cm_scacheLock write-locked; find a vnode to recycle.
229 * Can allocate a new one if desperate, or if below quota (cm_data.maxSCaches).
230 * returns scp->mx held.
232 cm_scache_t *cm_GetNewSCache(void)
237 lock_AssertWrite(&cm_scacheLock);
239 /* first pass - look for deleted objects */
240 for ( scp = cm_data.scacheLRULastp;
242 scp = (cm_scache_t *) osi_QPrev(&scp->q))
244 osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
245 "invalid cm_scache_t address");
247 if (scp->refCount == 0) {
248 if (scp->flags & CM_SCACHEFLAG_DELETED) {
249 if (!lock_TryWrite(&scp->rw))
252 osi_Log1(afsd_logp, "GetNewSCache attempting to recycle deleted scp 0x%x", scp);
253 if (!cm_RecycleSCache(scp, CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS)) {
255 /* we found an entry, so return it */
256 /* now remove from the LRU queue and put it back at the
257 * head of the LRU queue.
259 cm_AdjustScacheLRU(scp);
264 lock_ReleaseWrite(&scp->rw);
265 osi_Log1(afsd_logp, "GetNewSCache recycled failed scp 0x%x", scp);
266 } else if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
267 if (!lock_TryWrite(&scp->rw))
270 /* we found an entry, so return it */
271 /* now remove from the LRU queue and put it back at the
272 * head of the LRU queue.
274 cm_AdjustScacheLRU(scp);
281 osi_Log0(afsd_logp, "GetNewSCache no deleted or recycled entries available for reuse");
284 if (cm_data.currentSCaches >= cm_data.maxSCaches) {
285 /* There were no deleted scache objects that we could use. Try to find
286 * one that simply hasn't been used in a while.
288 for ( scp = cm_data.scacheLRULastp;
290 scp = (cm_scache_t *) osi_QPrev(&scp->q))
292 /* It is possible for the refCount to be zero and for there still
293 * to be outstanding dirty buffers. If there are dirty buffers,
294 * we must not recycle the scp. */
295 if (scp->refCount == 0 && scp->bufReadsp == NULL && scp->bufWritesp == NULL) {
296 if (!buf_DirtyBuffersExist(&scp->fid)) {
297 if (!lock_TryWrite(&scp->rw))
300 if (!cm_RecycleSCache(scp, 0)) {
301 /* we found an entry, so return it */
302 /* now remove from the LRU queue and put it back at the
303 * head of the LRU queue.
305 cm_AdjustScacheLRU(scp);
310 lock_ReleaseWrite(&scp->rw);
312 osi_Log1(afsd_logp,"GetNewSCache dirty buffers exist scp 0x%x", scp);
316 osi_Log1(afsd_logp, "GetNewSCache all scache entries in use (retry = %d)", retry);
321 /* if we get here, we should allocate a new scache entry. We either are below
322 * quota or we have a leak and need to allocate a new one to avoid panicing.
324 scp = cm_data.scacheBaseAddress + cm_data.currentSCaches;
325 osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
326 "invalid cm_scache_t address");
327 memset(scp, 0, sizeof(cm_scache_t));
328 scp->magic = CM_SCACHE_MAGIC;
329 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
330 osi_assertx(lock_TryWrite(&scp->rw), "cm_scache_t rw held after allocation");
331 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
333 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
335 scp->serverLock = -1;
337 /* and put it in the LRU queue */
338 osi_QAdd((osi_queue_t **) &cm_data.scacheLRUFirstp, &scp->q);
339 if (!cm_data.scacheLRULastp)
340 cm_data.scacheLRULastp = scp;
341 cm_data.currentSCaches++;
342 cm_dnlcPurgedp(scp); /* make doubly sure that this is not in dnlc */
344 scp->allNextp = cm_data.allSCachesp;
345 cm_data.allSCachesp = scp;
349 void cm_SetFid(cm_fid_t *fidp, afs_uint32 cell, afs_uint32 volume, afs_uint32 vnode, afs_uint32 unique)
352 fidp->volume = volume;
354 fidp->unique = unique;
355 fidp->hash = ((cell & 0xF) << 28) | ((volume & 0x3F) << 22) | ((vnode & 0x7FF) << 11) | (unique & 0x7FF);
358 /* like strcmp, only for fids */
359 __inline int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
361 if (ap->hash != bp->hash)
363 if (ap->vnode != bp->vnode)
365 if (ap->volume != bp->volume)
367 if (ap->unique != bp->unique)
369 if (ap->cell != bp->cell)
374 void cm_fakeSCacheInit(int newFile)
377 memset(&cm_data.fakeSCache, 0, sizeof(cm_scache_t));
378 cm_data.fakeSCache.cbServerp = (struct cm_server *)(-1);
379 /* can leave clientModTime at 0 */
380 cm_data.fakeSCache.fileType = CM_SCACHETYPE_FILE;
381 cm_data.fakeSCache.unixModeBits = 0777;
382 cm_data.fakeSCache.length.LowPart = 1000;
383 cm_data.fakeSCache.linkCount = 1;
384 cm_data.fakeSCache.refCount = 1;
386 lock_InitializeRWLock(&cm_data.fakeSCache.rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
390 cm_ValidateSCache(void)
392 cm_scache_t * scp, *lscp;
395 if ( cm_data.scacheLRUFirstp == NULL && cm_data.scacheLRULastp != NULL ||
396 cm_data.scacheLRUFirstp != NULL && cm_data.scacheLRULastp == NULL) {
397 afsi_log("cm_ValidateSCache failure: inconsistent LRU pointers");
398 fprintf(stderr, "cm_ValidateSCache failure: inconsistent LRU pointers\n");
402 for ( scp = cm_data.scacheLRUFirstp, lscp = NULL, i = 0;
404 lscp = scp, scp = (cm_scache_t *) osi_QNext(&scp->q), i++ ) {
405 if (scp->magic != CM_SCACHE_MAGIC) {
406 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
407 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
410 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
411 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
412 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
415 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
416 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
417 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
420 if (i > cm_data.currentSCaches ) {
421 afsi_log("cm_ValidateSCache failure: LRU First queue loops");
422 fprintf(stderr, "cm_ValidateSCache failure: LUR First queue loops\n");
425 if (lscp != (cm_scache_t *) osi_QPrev(&scp->q)) {
426 afsi_log("cm_ValidateSCache failure: QPrev(scp) != previous");
427 fprintf(stderr, "cm_ValidateSCache failure: QPrev(scp) != previous\n");
432 for ( scp = cm_data.scacheLRULastp, lscp = NULL, i = 0; scp;
433 lscp = scp, scp = (cm_scache_t *) osi_QPrev(&scp->q), i++ ) {
434 if (scp->magic != CM_SCACHE_MAGIC) {
435 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
436 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
439 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
440 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
441 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
444 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
445 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
446 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
449 if (i > cm_data.currentSCaches ) {
450 afsi_log("cm_ValidateSCache failure: LRU Last queue loops");
451 fprintf(stderr, "cm_ValidateSCache failure: LUR Last queue loops\n");
454 if (lscp != (cm_scache_t *) osi_QNext(&scp->q)) {
455 afsi_log("cm_ValidateSCache failure: QNext(scp) != next");
456 fprintf(stderr, "cm_ValidateSCache failure: QNext(scp) != next\n");
461 for ( i=0; i < cm_data.scacheHashTableSize; i++ ) {
462 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
464 hash = CM_SCACHE_HASH(&scp->fid);
465 if (scp->magic != CM_SCACHE_MAGIC) {
466 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
467 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
470 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
471 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
472 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
475 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
476 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
477 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
481 afsi_log("cm_ValidateSCache failure: scp hash != hash index");
482 fprintf(stderr, "cm_ValidateSCache failure: scp hash != hash index\n");
488 return cm_dnlcValidate();
492 cm_SuspendSCache(void)
497 cm_GiveUpAllCallbacksAllServers(TRUE);
500 * After this call all servers are marked down.
501 * Do not clear the callbacks, instead change the
502 * expiration time so that the callbacks will be expired
503 * when the servers are marked back up. However, we
504 * want the callbacks to be preserved as long as the
505 * servers are down. That way if the machine resumes
506 * without network, the stat cache item will still be
511 lock_ObtainWrite(&cm_scacheLock);
512 for ( scp = cm_data.allSCachesp; scp; scp = scp->allNextp ) {
513 if (scp->cbServerp) {
514 if (scp->flags & CM_SCACHEFLAG_PURERO) {
515 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
517 if (volp->cbExpiresRO == scp->cbExpires)
518 volp->cbExpiresRO = now+1;
522 scp->cbExpires = now+1;
525 lock_ReleaseWrite(&cm_scacheLock);
529 cm_ShutdownSCache(void)
533 lock_ObtainWrite(&cm_scacheLock);
535 for ( scp = cm_data.allSCachesp; scp;
536 scp = scp->allNextp ) {
537 if (scp->randomACLp) {
538 lock_ReleaseWrite(&cm_scacheLock);
539 lock_ObtainWrite(&scp->rw);
540 lock_ObtainWrite(&cm_scacheLock);
541 cm_FreeAllACLEnts(scp);
542 lock_ReleaseWrite(&scp->rw);
545 if (scp->cbServerp) {
546 cm_PutServer(scp->cbServerp);
547 scp->cbServerp = NULL;
550 scp->flags &= ~CM_SCACHEFLAG_CALLBACK;
554 freeBtree(scp->dirBplus);
555 scp->dirBplus = NULL;
556 scp->dirDataVersion = -1;
557 lock_FinalizeRWLock(&scp->dirlock);
559 lock_FinalizeRWLock(&scp->rw);
560 lock_FinalizeRWLock(&scp->bufCreateLock);
562 lock_ReleaseWrite(&cm_scacheLock);
564 cm_GiveUpAllCallbacksAllServers(FALSE);
566 return cm_dnlcShutdown();
569 void cm_InitSCache(int newFile, long maxSCaches)
571 static osi_once_t once;
573 if (osi_Once(&once)) {
574 lock_InitializeRWLock(&cm_scacheLock, "cm_scacheLock", LOCK_HIERARCHY_SCACHE_GLOBAL);
576 memset(cm_data.scacheHashTablep, 0, sizeof(cm_scache_t *) * cm_data.scacheHashTableSize);
577 cm_data.allSCachesp = NULL;
578 cm_data.currentSCaches = 0;
579 cm_data.maxSCaches = maxSCaches;
580 cm_data.scacheLRUFirstp = cm_data.scacheLRULastp = NULL;
584 for ( scp = cm_data.allSCachesp; scp;
585 scp = scp->allNextp ) {
586 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
587 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
589 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
591 scp->cbServerp = NULL;
593 scp->fileLocksH = NULL;
594 scp->fileLocksT = NULL;
595 scp->serverLock = (-1);
596 scp->lastRefreshCycle = 0;
597 scp->exclusiveLocks = 0;
598 scp->sharedLocks = 0;
605 scp->dirBplus = NULL;
606 scp->dirDataVersion = -1;
608 scp->waitQueueT = NULL;
609 scp->flags &= ~CM_SCACHEFLAG_WAITING;
612 cm_allFileLocks = NULL;
613 cm_freeFileLocks = NULL;
614 cm_lockRefreshCycle = 0;
615 cm_fakeSCacheInit(newFile);
616 cm_allFreeWaiters = NULL;
617 cm_dnlcInit(newFile);
622 /* version that doesn't bother creating the entry if we don't find it */
623 cm_scache_t *cm_FindSCache(cm_fid_t *fidp)
628 hash = CM_SCACHE_HASH(fidp);
630 if (fidp->cell == 0) {
634 lock_ObtainRead(&cm_scacheLock);
635 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
636 if (cm_FidCmp(fidp, &scp->fid) == 0) {
637 cm_HoldSCacheNoLock(scp);
638 lock_ConvertRToW(&cm_scacheLock);
639 cm_AdjustScacheLRU(scp);
640 lock_ReleaseWrite(&cm_scacheLock);
644 lock_ReleaseRead(&cm_scacheLock);
648 #ifdef DEBUG_REFCOUNT
649 long cm_GetSCacheDbg(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
650 cm_req_t *reqp, char * file, long line)
652 long cm_GetSCache(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
657 cm_scache_t *scp = NULL;
659 cm_volume_t *volp = NULL;
661 int special = 0; // yj: boolean variable to test if file is on root.afs
663 extern cm_fid_t cm_rootFid;
665 hash = CM_SCACHE_HASH(fidp);
667 osi_assertx(fidp->cell != 0, "unassigned cell value");
669 #ifdef AFS_FREELANCE_CLIENT
670 special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
671 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
672 !(fidp->vnode==0x1 && fidp->unique==0x1));
673 isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
674 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
675 fidp->vnode==0x1 && fidp->unique==0x1);
678 // yj: check if we have the scp, if so, we don't need
679 // to do anything else
680 lock_ObtainWrite(&cm_scacheLock);
681 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
682 if (cm_FidCmp(fidp, &scp->fid) == 0) {
683 #ifdef DEBUG_REFCOUNT
684 afsi_log("%s:%d cm_GetSCache (1) scp 0x%p ref %d", file, line, scp, scp->refCount);
685 osi_Log1(afsd_logp,"cm_GetSCache (1) scp 0x%p", scp);
687 #ifdef AFS_FREELANCE_CLIENT
688 if (cm_freelanceEnabled && special &&
689 cm_data.fakeDirVersion != scp->dataVersion)
692 cm_HoldSCacheNoLock(scp);
694 cm_AdjustScacheLRU(scp);
695 lock_ReleaseWrite(&cm_scacheLock);
700 // yj: when we get here, it means we don't have an scp
701 // so we need to either load it or fake it, depending
702 // on whether the file is "special", see below.
704 // yj: if we're trying to get an scp for a file that's
705 // on root.afs of homecell, we want to handle it specially
706 // because we have to fill in the status stuff 'coz we
707 // don't want trybulkstat to fill it in for us
708 #ifdef AFS_FREELANCE_CLIENT
709 if (cm_freelanceEnabled && isRoot) {
710 osi_Log0(afsd_logp,"cm_GetSCache Freelance and isRoot");
711 /* freelance: if we are trying to get the root scp for the first
712 * time, we will just put in a place holder entry.
717 if (cm_freelanceEnabled && special) {
718 char mp[MOUNTPOINTLEN] = "";
721 lock_ReleaseWrite(&cm_scacheLock);
722 osi_Log0(afsd_logp,"cm_GetSCache Freelance and special");
724 if (cm_getLocalMountPointChange()) { // check for changes
725 cm_clearLocalMountPointChange(); // clear the changefile
726 cm_reInitLocalMountPoints(); // start reinit
729 lock_ObtainMutex(&cm_Freelance_Lock);
730 if (fidp->vnode >= 2 && fidp->vnode - 2 < cm_noLocalMountPoints) {
731 strncpy(mp,(cm_localMountPoints+fidp->vnode-2)->mountPointStringp, MOUNTPOINTLEN);
732 mp[MOUNTPOINTLEN-1] = '\0';
733 if ( !strnicmp(mp, "msdfs:", strlen("msdfs:")) )
734 fileType = CM_SCACHETYPE_DFSLINK;
736 fileType = (cm_localMountPoints+fidp->vnode-2)->fileType;
738 fileType = CM_SCACHETYPE_INVALID;
741 lock_ReleaseMutex(&cm_Freelance_Lock);
742 lock_ObtainWrite(&cm_scacheLock);
744 scp = cm_GetNewSCache(); /* returns scp->mx held */
746 osi_Log0(afsd_logp,"cm_GetSCache unable to obtain *new* scache entry");
747 lock_ReleaseWrite(&cm_scacheLock);
748 return CM_ERROR_WOULDBLOCK;
752 scp->dotdotFid.cell=AFS_FAKE_ROOT_CELL_ID;
753 scp->dotdotFid.volume=AFS_FAKE_ROOT_VOL_ID;
754 scp->dotdotFid.unique=1;
755 scp->dotdotFid.vnode=1;
756 scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
757 if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
758 scp->nextp = cm_data.scacheHashTablep[hash];
759 cm_data.scacheHashTablep[hash] = scp;
760 scp->flags |= CM_SCACHEFLAG_INHASH;
763 osi_Log1(afsd_logp,"cm_GetSCache (freelance) sets refCount to 1 scp 0x%x", scp);
764 scp->fileType = fileType;
765 scp->length.LowPart = (DWORD)strlen(mp)+4;
766 scp->length.HighPart = 0;
767 strncpy(scp->mountPointStringp,mp,MOUNTPOINTLEN);
769 scp->unixModeBits=0777;
770 scp->clientModTime=FakeFreelanceModTime;
771 scp->serverModTime=FakeFreelanceModTime;
772 scp->parentUnique = 0x1;
773 scp->parentVnode=0x1;
775 scp->dataVersion=cm_data.fakeDirVersion;
776 scp->bufDataVersionLow=cm_data.fakeDirVersion;
777 scp->lockDataVersion=-1; /* no lock yet */
778 lock_ReleaseWrite(&scp->rw);
780 #ifdef DEBUG_REFCOUNT
781 afsi_log("%s:%d cm_GetSCache (2) scp 0x%p ref %d", file, line, scp, scp->refCount);
782 osi_Log1(afsd_logp,"cm_GetSCache (2) scp 0x%p", scp);
784 lock_ReleaseWrite(&cm_scacheLock);
788 #endif /* AFS_FREELANCE_CLIENT */
790 /* otherwise, we need to find the volume */
791 if (!cm_freelanceEnabled || !isRoot) {
792 lock_ReleaseWrite(&cm_scacheLock); /* for perf. reasons */
793 cellp = cm_FindCellByID(fidp->cell, 0);
795 return CM_ERROR_NOSUCHCELL;
797 code = cm_FindVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
800 lock_ObtainWrite(&cm_scacheLock);
803 /* otherwise, we have the volume, now reverify that the scp doesn't
804 * exist, and proceed.
806 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
807 if (cm_FidCmp(fidp, &scp->fid) == 0) {
808 #ifdef DEBUG_REFCOUNT
809 afsi_log("%s:%d cm_GetSCache (3) scp 0x%p ref %d", file, line, scp, scp->refCount);
810 osi_Log1(afsd_logp,"cm_GetSCache (3) scp 0x%p", scp);
812 cm_HoldSCacheNoLock(scp);
813 cm_AdjustScacheLRU(scp);
814 lock_ReleaseWrite(&cm_scacheLock);
822 /* now, if we don't have the fid, recycle something */
823 scp = cm_GetNewSCache(); /* returns scp->mx held */
825 osi_Log0(afsd_logp,"cm_GetNewSCache unable to obtain *new* scache entry");
826 lock_ReleaseWrite(&cm_scacheLock);
829 return CM_ERROR_WOULDBLOCK;
831 #ifdef DEBUG_REFCOUNT
832 afsi_log("%s:%d cm_GetNewSCache returns scp 0x%p flags 0x%x", file, line, scp, scp->flags);
834 osi_Log2(afsd_logp,"cm_GetNewSCache returns scp 0x%p flags 0x%x", scp, scp->flags);
836 osi_assertx(!(scp->flags & CM_SCACHEFLAG_INHASH), "CM_SCACHEFLAG_INHASH set");
839 if (!cm_freelanceEnabled || !isRoot) {
840 /* if this scache entry represents a volume root then we need
841 * to copy the dotdotFipd from the volume structure where the
842 * "master" copy is stored (defect 11489)
844 if (volp->vol[ROVOL].ID == fidp->volume) {
845 scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
846 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
847 scp->dotdotFid = cm_VolumeStateByType(volp, ROVOL)->dotdotFid;
848 } else if (volp->vol[BACKVOL].ID == fidp->volume) {
849 scp->flags |= CM_SCACHEFLAG_RO;
850 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
851 scp->dotdotFid = cm_VolumeStateByType(volp, BACKVOL)->dotdotFid;
853 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
854 scp->dotdotFid = cm_VolumeStateByType(volp, RWVOL)->dotdotFid;
859 scp->nextp = cm_data.scacheHashTablep[hash];
860 cm_data.scacheHashTablep[hash] = scp;
861 scp->flags |= CM_SCACHEFLAG_INHASH;
862 lock_ReleaseWrite(&scp->rw);
864 #ifdef DEBUG_REFCOUNT
865 afsi_log("%s:%d cm_GetSCache sets refCount to 1 scp 0x%x", file, line, scp);
867 osi_Log1(afsd_logp,"cm_GetSCache sets refCount to 1 scp 0x%x", scp);
869 /* XXX - The following fields in the cm_scache are
876 /* now we have a held scache entry; just return it */
878 #ifdef DEBUG_REFCOUNT
879 afsi_log("%s:%d cm_GetSCache (4) scp 0x%p ref %d", file, line, scp, scp->refCount);
880 osi_Log1(afsd_logp,"cm_GetSCache (4) scp 0x%p", scp);
882 lock_ReleaseWrite(&cm_scacheLock);
886 /* Returns a held reference to the scache's parent
888 cm_scache_t * cm_FindSCacheParent(cm_scache_t * scp)
893 cm_scache_t * pscp = NULL;
895 lock_ObtainWrite(&cm_scacheLock);
896 cm_SetFid(&parent_fid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
898 if (cm_FidCmp(&scp->fid, &parent_fid)) {
899 i = CM_SCACHE_HASH(&parent_fid);
900 for (pscp = cm_data.scacheHashTablep[i]; pscp; pscp = pscp->nextp) {
901 if (!cm_FidCmp(&pscp->fid, &parent_fid)) {
902 cm_HoldSCacheNoLock(pscp);
908 lock_ReleaseWrite(&cm_scacheLock);
913 void cm_SyncOpAddToWaitQueue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
915 cm_scache_waiter_t * w;
917 lock_ObtainWrite(&cm_scacheLock);
918 if (cm_allFreeWaiters == NULL) {
919 w = malloc(sizeof(*w));
920 memset(w, 0, sizeof(*w));
922 w = (cm_scache_waiter_t *) cm_allFreeWaiters;
923 osi_QRemove(&cm_allFreeWaiters, (osi_queue_t *) w);
926 w->threadId = thrd_Current();
928 cm_HoldSCacheNoLock(scp);
932 osi_QAddT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
933 lock_ReleaseWrite(&cm_scacheLock);
935 osi_Log2(afsd_logp, "cm_SyncOpAddToWaitQueue : Adding thread to wait queue scp 0x%p w 0x%p", scp, w);
938 int cm_SyncOpCheckContinue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
940 cm_scache_waiter_t * w;
943 osi_Log0(afsd_logp, "cm_SyncOpCheckContinue checking for continuation");
945 lock_ObtainRead(&cm_scacheLock);
946 for (w = (cm_scache_waiter_t *)scp->waitQueueH;
948 w = (cm_scache_waiter_t *)osi_QNext((osi_queue_t *) w)) {
949 if (w->flags == flags && w->bufp == bufp) {
954 osi_assertx(w != NULL, "null cm_scache_waiter_t");
955 this_is_me = (w->threadId == thrd_Current());
956 lock_ReleaseRead(&cm_scacheLock);
959 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue MISS: Waiter 0x%p", w);
963 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue HIT: Waiter 0x%p", w);
965 lock_ObtainWrite(&cm_scacheLock);
966 osi_QRemoveHT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
967 cm_ReleaseSCacheNoLock(scp);
968 memset(w, 0, sizeof(*w));
969 osi_QAdd(&cm_allFreeWaiters, (osi_queue_t *) w);
970 lock_ReleaseWrite(&cm_scacheLock);
976 /* synchronize a fetch, store, read, write, fetch status or store status.
977 * Called with scache mutex held, and returns with it held, but temporarily
978 * drops it during the fetch.
980 * At most one flag can be on in flags, if this is an RPC request.
982 * Also, if we're fetching or storing data, we must ensure that we have a buffer.
984 * There are a lot of weird restrictions here; here's an attempt to explain the
985 * rationale for the concurrency restrictions implemented in this function.
987 * First, although the file server will break callbacks when *another* machine
988 * modifies a file or status block, the client itself is responsible for
989 * concurrency control on its own requests. Callback breaking events are rare,
990 * and simply invalidate any concurrent new status info.
992 * In the absence of callback breaking messages, we need to know how to
993 * synchronize incoming responses describing updates to files. We synchronize
994 * operations that update the data version by comparing the data versions.
995 * However, updates that do not update the data, but only the status, can't be
996 * synchronized with fetches or stores, since there's nothing to compare
997 * to tell which operation executed first at the server.
999 * Thus, we can allow multiple ops that change file data, or dir data, and
1000 * fetches. However, status storing ops have to be done serially.
1002 * Furthermore, certain data-changing ops are incompatible: we can't read or
1003 * write a buffer while doing a truncate. We can't read and write the same
1004 * buffer at the same time, or write while fetching or storing, or read while
1005 * fetching a buffer (this may change). We can't fetch and store at the same
1008 * With respect to status, we can't read and write at the same time, read while
1009 * fetching, write while fetching or storing, or fetch and store at the same time.
1011 * We can't allow a get callback RPC to run in concurrently with something that
1012 * will return updated status, since we could start a call, have the server
1013 * return status, have another machine make an update to the status (which
1014 * doesn't change serverModTime), have the original machine get a new callback,
1015 * and then have the original machine merge in the early, old info from the
1016 * first call. At this point, the easiest way to avoid this problem is to have
1017 * getcallback calls conflict with all others for the same vnode. Other calls
1018 * to cm_MergeStatus that aren't associated with calls to cm_SyncOp on the same
1019 * vnode must be careful not to merge in their status unless they have obtained
1020 * a callback from the start of their call.
1022 * Note added 1/23/96
1023 * Concurrent StoreData RPC's can cause trouble if the file is being extended.
1024 * Each such RPC passes a FileLength parameter, which the server uses to do
1025 * pre-truncation if necessary. So if two RPC's are processed out of order at
1026 * the server, the one with the smaller FileLength will be processed last,
1027 * possibly resulting in a bogus truncation. The simplest way to avoid this
1028 * is to serialize all StoreData RPC's. This is the reason we defined
1029 * CM_SCACHESYNC_STOREDATA_EXCL and CM_SCACHEFLAG_DATASTORING.
1031 long cm_SyncOp(cm_scache_t *scp, cm_buf_t *bufp, cm_user_t *userp, cm_req_t *reqp,
1032 afs_uint32 rights, afs_uint32 flags)
1034 osi_queueData_t *qdp;
1037 afs_uint32 outRights;
1039 afs_uint32 sleep_scp_flags = 0;
1040 afs_uint32 sleep_buf_cmflags = 0;
1041 afs_uint32 sleep_scp_bufs = 0;
1044 lock_AssertWrite(&scp->rw);
1046 /* lookup this first */
1047 bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
1050 osi_assertx(bufp->refCount > 0, "cm_buf_t refCount 0");
1053 /* Do the access check. Now we don't really do the access check
1054 * atomically, since the caller doesn't expect the parent dir to be
1055 * returned locked, and that is what we'd have to do to prevent a
1056 * callback breaking message on the parent due to a setacl call from
1057 * being processed while we're running. So, instead, we check things
1058 * here, and if things look fine with the access, we proceed to finish
1059 * the rest of this check. Sort of a hack, but probably good enough.
1063 if (flags & CM_SCACHESYNC_FETCHSTATUS) {
1064 /* if we're bringing in a new status block, ensure that
1065 * we aren't already doing so, and that no one is
1066 * changing the status concurrently, either. We need
1067 * to do this, even if the status is of a different
1068 * type, since we don't have the ability to figure out,
1069 * in the AFS 3 protocols, which status-changing
1070 * operation ran first, or even which order a read and
1071 * a write occurred in.
1073 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1074 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1075 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want FETCHSTATUS", scp);
1079 if (flags & (CM_SCACHESYNC_STORESIZE | CM_SCACHESYNC_STORESTATUS
1080 | CM_SCACHESYNC_SETSIZE | CM_SCACHESYNC_GETCALLBACK)) {
1081 /* if we're going to make an RPC to change the status, make sure
1082 * that no one is bringing in or sending out the status.
1084 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING |
1085 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1086 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1089 if (scp->bufReadsp || scp->bufWritesp) {
1090 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is bufRead|bufWrite want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1094 if (flags & CM_SCACHESYNC_FETCHDATA) {
1095 /* if we're bringing in a new chunk of data, make sure that
1096 * nothing is happening to that chunk, and that we aren't
1097 * changing the basic file status info, either.
1099 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1100 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1101 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want FETCHDATA", scp);
1104 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1105 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want FETCHDATA", scp, bufp);
1109 if (flags & CM_SCACHESYNC_STOREDATA) {
1110 /* same as fetch data */
1111 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1112 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1113 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STOREDATA", scp);
1116 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1117 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want STOREDATA", scp, bufp);
1122 if (flags & CM_SCACHESYNC_STOREDATA_EXCL) {
1123 /* Don't allow concurrent StoreData RPC's */
1124 if (scp->flags & CM_SCACHEFLAG_DATASTORING) {
1125 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is DATASTORING want STOREDATA_EXCL", scp);
1130 if (flags & CM_SCACHESYNC_ASYNCSTORE) {
1131 /* Don't allow more than one BKG store request */
1132 if (scp->flags & CM_SCACHEFLAG_ASYNCSTORING) {
1133 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is ASYNCSTORING want ASYNCSTORE", scp);
1138 if (flags & CM_SCACHESYNC_LOCK) {
1139 /* Don't allow concurrent fiddling with lock lists */
1140 if (scp->flags & CM_SCACHEFLAG_LOCKING) {
1141 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is LOCKING want LOCK", scp);
1146 /* now the operations that don't correspond to making RPCs */
1147 if (flags & CM_SCACHESYNC_GETSTATUS) {
1148 /* we can use the status that's here, if we're not
1149 * bringing in new status.
1151 if (scp->flags & (CM_SCACHEFLAG_FETCHING)) {
1152 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want GETSTATUS", scp);
1156 if (flags & CM_SCACHESYNC_SETSTATUS) {
1157 /* we can make a change to the local status, as long as
1158 * the status isn't changing now.
1160 * If we're fetching or storing a chunk of data, we can
1161 * change the status locally, since the fetch/store
1162 * operations don't change any of the data that we're
1165 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESTORING)) {
1166 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING want SETSTATUS", scp);
1170 if (flags & CM_SCACHESYNC_READ) {
1171 /* we're going to read the data, make sure that the
1172 * status is available, and that the data is here. It
1173 * is OK to read while storing the data back.
1175 if (scp->flags & CM_SCACHEFLAG_FETCHING) {
1176 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want READ", scp);
1179 if (bufp && ((bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED)) == CM_BUF_CMFETCHING)) {
1180 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING want READ", scp, bufp);
1183 if (bufp && (bufp->cmFlags & CM_BUF_CMWRITING)) {
1184 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMWRITING want READ", scp, bufp);
1188 if (flags & CM_SCACHESYNC_WRITE) {
1189 /* don't write unless the status is stable and the chunk
1192 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1193 | CM_SCACHEFLAG_SIZESTORING)) {
1194 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING want WRITE", scp);
1197 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING |
1199 CM_BUF_CMWRITING))) {
1200 osi_Log3(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is %s want WRITE",
1202 ((bufp->cmFlags & CM_BUF_CMFETCHING) ? "CM_BUF_CMFETCHING":
1203 ((bufp->cmFlags & CM_BUF_CMSTORING) ? "CM_BUF_CMSTORING" :
1204 ((bufp->cmFlags & CM_BUF_CMWRITING) ? "CM_BUF_CMWRITING" :
1210 // yj: modified this so that callback only checked if we're
1211 // not checking something on /afs
1212 /* fix the conditional to match the one in cm_HaveCallback */
1213 if ((flags & CM_SCACHESYNC_NEEDCALLBACK)
1214 #ifdef AFS_FREELANCE_CLIENT
1215 && (!cm_freelanceEnabled ||
1216 !(scp->fid.vnode==0x1 && scp->fid.unique==0x1) ||
1217 scp->fid.cell!=AFS_FAKE_ROOT_CELL_ID ||
1218 scp->fid.volume!=AFS_FAKE_ROOT_VOL_ID ||
1219 cm_fakeDirCallback < 2)
1220 #endif /* AFS_FREELANCE_CLIENT */
1222 if ((flags & CM_SCACHESYNC_FORCECB) || !cm_HaveCallback(scp)) {
1223 osi_Log1(afsd_logp, "CM SyncOp getting callback on scp 0x%p",
1226 lock_ReleaseMutex(&bufp->mx);
1227 code = cm_GetCallback(scp, userp, reqp, (flags & CM_SCACHESYNC_FORCECB)?1:0);
1229 lock_ReleaseWrite(&scp->rw);
1230 lock_ObtainMutex(&bufp->mx);
1231 lock_ObtainWrite(&scp->rw);
1235 flags &= ~CM_SCACHESYNC_FORCECB; /* only force once */
1241 /* can't check access rights without a callback */
1242 osi_assertx(flags & CM_SCACHESYNC_NEEDCALLBACK, "!CM_SCACHESYNC_NEEDCALLBACK");
1244 if ((rights & (PRSFS_WRITE|PRSFS_DELETE)) && (scp->flags & CM_SCACHEFLAG_RO))
1245 return CM_ERROR_READONLY;
1247 if (cm_HaveAccessRights(scp, userp, rights, &outRights)) {
1248 if (~outRights & rights)
1249 return CM_ERROR_NOACCESS;
1252 /* we don't know the required access rights */
1253 if (bufLocked) lock_ReleaseMutex(&bufp->mx);
1254 code = cm_GetAccessRights(scp, userp, reqp);
1256 lock_ReleaseWrite(&scp->rw);
1257 lock_ObtainMutex(&bufp->mx);
1258 lock_ObtainWrite(&scp->rw);
1266 /* if we get here, we're happy */
1270 /* first check if we're not supposed to wait: fail
1271 * in this case, returning with everything still locked.
1273 if (flags & CM_SCACHESYNC_NOWAIT)
1274 return CM_ERROR_WOULDBLOCK;
1276 /* These are used for minidump debugging */
1277 sleep_scp_flags = scp->flags; /* so we know why we slept */
1278 sleep_buf_cmflags = bufp ? bufp->cmFlags : 0;
1279 sleep_scp_bufs = (scp->bufReadsp ? 1 : 0) | (scp->bufWritesp ? 2 : 0);
1281 /* wait here, then try again */
1282 osi_Log1(afsd_logp, "CM SyncOp sleeping scp 0x%p", scp);
1283 if ( scp->flags & CM_SCACHEFLAG_WAITING ) {
1285 scp->waitRequests++;
1286 osi_Log3(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING already set for 0x%p; %d threads; %d requests",
1287 scp, scp->waitCount, scp->waitRequests);
1289 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING set for 0x%p", scp);
1290 scp->flags |= CM_SCACHEFLAG_WAITING;
1291 scp->waitCount = scp->waitRequests = 1;
1294 cm_SyncOpAddToWaitQueue(scp, flags, bufp);
1298 lock_ReleaseMutex(&bufp->mx);
1299 osi_SleepW((LONG_PTR) &scp->flags, &scp->rw);
1301 lock_ObtainMutex(&bufp->mx);
1302 lock_ObtainWrite(&scp->rw);
1303 } while (!cm_SyncOpCheckContinue(scp, flags, bufp));
1305 smb_UpdateServerPriority();
1308 osi_Log3(afsd_logp, "CM SyncOp woke! scp 0x%p; still waiting %d threads of %d requests",
1309 scp, scp->waitCount, scp->waitRequests);
1310 if (scp->waitCount == 0) {
1311 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING reset for 0x%p", scp);
1312 scp->flags &= ~CM_SCACHEFLAG_WAITING;
1313 scp->waitRequests = 0;
1315 } /* big while loop */
1317 /* now, update the recorded state for RPC-type calls */
1318 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1319 scp->flags |= CM_SCACHEFLAG_FETCHING;
1320 if (flags & CM_SCACHESYNC_STORESTATUS)
1321 scp->flags |= CM_SCACHEFLAG_STORING;
1322 if (flags & CM_SCACHESYNC_STORESIZE)
1323 scp->flags |= CM_SCACHEFLAG_SIZESTORING;
1324 if (flags & CM_SCACHESYNC_GETCALLBACK)
1325 scp->flags |= CM_SCACHEFLAG_GETCALLBACK;
1326 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1327 scp->flags |= CM_SCACHEFLAG_DATASTORING;
1328 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1329 scp->flags |= CM_SCACHEFLAG_ASYNCSTORING;
1330 if (flags & CM_SCACHESYNC_LOCK)
1331 scp->flags |= CM_SCACHEFLAG_LOCKING;
1333 /* now update the buffer pointer */
1334 if (flags & CM_SCACHESYNC_FETCHDATA) {
1335 /* ensure that the buffer isn't already in the I/O list */
1337 for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1338 tbufp = osi_GetQData(qdp);
1339 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1343 /* queue a held reference to the buffer in the "reading" I/O list */
1344 qdp = osi_QDAlloc();
1345 osi_SetQData(qdp, bufp);
1348 bufp->cmFlags |= CM_BUF_CMFETCHING;
1350 osi_QAdd((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1353 if (flags & CM_SCACHESYNC_STOREDATA) {
1354 /* ensure that the buffer isn't already in the I/O list */
1356 for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1357 tbufp = osi_GetQData(qdp);
1358 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1362 /* queue a held reference to the buffer in the "writing" I/O list */
1363 qdp = osi_QDAlloc();
1364 osi_SetQData(qdp, bufp);
1367 bufp->cmFlags |= CM_BUF_CMSTORING;
1369 osi_QAdd((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1372 if (flags & CM_SCACHESYNC_WRITE) {
1373 /* mark the buffer as being written to. */
1375 bufp->cmFlags |= CM_BUF_CMWRITING;
1382 /* for those syncops that setup for RPCs.
1383 * Called with scache locked.
1385 void cm_SyncOpDone(cm_scache_t *scp, cm_buf_t *bufp, afs_uint32 flags)
1387 osi_queueData_t *qdp;
1390 lock_AssertWrite(&scp->rw);
1392 /* now, update the recorded state for RPC-type calls */
1393 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1394 scp->flags &= ~CM_SCACHEFLAG_FETCHING;
1395 if (flags & CM_SCACHESYNC_STORESTATUS)
1396 scp->flags &= ~CM_SCACHEFLAG_STORING;
1397 if (flags & CM_SCACHESYNC_STORESIZE)
1398 scp->flags &= ~CM_SCACHEFLAG_SIZESTORING;
1399 if (flags & CM_SCACHESYNC_GETCALLBACK)
1400 scp->flags &= ~CM_SCACHEFLAG_GETCALLBACK;
1401 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1402 scp->flags &= ~CM_SCACHEFLAG_DATASTORING;
1403 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1404 scp->flags &= ~CM_SCACHEFLAG_ASYNCSTORING;
1405 if (flags & CM_SCACHESYNC_LOCK)
1406 scp->flags &= ~CM_SCACHEFLAG_LOCKING;
1408 /* now update the buffer pointer */
1409 if (flags & CM_SCACHESYNC_FETCHDATA) {
1412 /* ensure that the buffer isn't already in the I/O list */
1413 for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1414 tbufp = osi_GetQData(qdp);
1419 osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1424 bufp->cmFlags &= ~(CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED);
1425 if (bufp->flags & CM_BUF_WAITING) {
1426 osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1427 osi_Wakeup((LONG_PTR) &bufp);
1434 /* now update the buffer pointer */
1435 if (flags & CM_SCACHESYNC_STOREDATA) {
1437 /* ensure that the buffer isn't already in the I/O list */
1438 for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1439 tbufp = osi_GetQData(qdp);
1444 osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1449 bufp->cmFlags &= ~CM_BUF_CMSTORING;
1450 if (bufp->flags & CM_BUF_WAITING) {
1451 osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1452 osi_Wakeup((LONG_PTR) &bufp);
1459 if (flags & CM_SCACHESYNC_WRITE) {
1461 osi_assertx(bufp->cmFlags & CM_BUF_CMWRITING, "!CM_BUF_CMWRITING");
1463 bufp->cmFlags &= ~CM_BUF_CMWRITING;
1467 /* and wakeup anyone who is waiting */
1468 if (scp->flags & CM_SCACHEFLAG_WAITING) {
1469 osi_Log1(afsd_logp, "CM SyncOpDone Waking scp 0x%p", scp);
1470 osi_Wakeup((LONG_PTR) &scp->flags);
1474 /* merge in a response from an RPC. The scp must be locked, and the callback
1477 * Don't overwrite any status info that is dirty, since we could have a store
1478 * operation (such as store data) that merges some info in, and we don't want
1479 * to lose the local updates. Typically, there aren't many updates we do
1480 * locally, anyway, probably only mtime.
1482 * There is probably a bug in here where a chmod (which doesn't change
1483 * serverModTime) that occurs between two fetches, both of whose responses are
1484 * handled after the callback breaking is done, but only one of whose calls
1485 * started before that, can cause old info to be merged from the first call.
1487 void cm_MergeStatus(cm_scache_t *dscp,
1488 cm_scache_t *scp, AFSFetchStatus *statusp,
1489 AFSVolSync *volsyncp,
1490 cm_user_t *userp, afs_uint32 flags)
1492 afs_uint64 dataVersion;
1494 // yj: i want to create some fake status for the /afs directory and the
1495 // entries under that directory
1496 #ifdef AFS_FREELANCE_CLIENT
1497 if (cm_freelanceEnabled && scp == cm_data.rootSCachep) {
1498 osi_Log0(afsd_logp,"cm_MergeStatus Freelance cm_data.rootSCachep");
1499 statusp->InterfaceVersion = 0x1;
1500 statusp->FileType = CM_SCACHETYPE_DIRECTORY;
1501 statusp->LinkCount = scp->linkCount;
1502 statusp->Length = cm_fakeDirSize;
1503 statusp->Length_hi = 0;
1504 statusp->DataVersion = (afs_uint32)(cm_data.fakeDirVersion & 0xFFFFFFFF);
1505 statusp->Author = 0x1;
1506 statusp->Owner = 0x0;
1507 statusp->CallerAccess = 0x9;
1508 statusp->AnonymousAccess = 0x9;
1509 statusp->UnixModeBits = 0777;
1510 statusp->ParentVnode = 0x1;
1511 statusp->ParentUnique = 0x1;
1512 statusp->ResidencyMask = 0;
1513 statusp->ClientModTime = FakeFreelanceModTime;
1514 statusp->ServerModTime = FakeFreelanceModTime;
1516 statusp->SyncCounter = 0;
1517 statusp->dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
1518 statusp->errorCode = 0;
1520 #endif /* AFS_FREELANCE_CLIENT */
1522 if (statusp->errorCode != 0) {
1523 scp->flags |= CM_SCACHEFLAG_EACCESS;
1524 osi_Log2(afsd_logp, "Merge, Failure scp %x code 0x%x", scp, statusp->errorCode);
1526 scp->fileType = 0; /* unknown */
1528 scp->serverModTime = 0;
1529 scp->clientModTime = 0;
1530 scp->length.LowPart = 0;
1531 scp->length.HighPart = 0;
1532 scp->serverLength.LowPart = 0;
1533 scp->serverLength.HighPart = 0;
1537 scp->unixModeBits = 0;
1539 scp->dataVersion = 0;
1540 scp->bufDataVersionLow = 0;
1543 scp->parentVnode = dscp->fid.vnode;
1544 scp->parentUnique = dscp->fid.unique;
1546 scp->parentVnode = 0;
1547 scp->parentUnique = 0;
1551 scp->flags &= ~CM_SCACHEFLAG_EACCESS;
1554 dataVersion = statusp->dataVersionHigh;
1556 dataVersion |= statusp->DataVersion;
1558 if (!(flags & CM_MERGEFLAG_FORCE) && dataVersion < scp->dataVersion) {
1559 struct cm_cell *cellp;
1561 cellp = cm_FindCellByID(scp->fid.cell, 0);
1562 if (scp->cbServerp) {
1563 struct cm_volume *volp = NULL;
1565 cm_FindVolumeByID(cellp, scp->fid.volume, userp,
1566 (cm_req_t *) NULL, CM_GETVOL_FLAG_CREATE, &volp);
1567 osi_Log2(afsd_logp, "old data from server %x volume %s",
1568 scp->cbServerp->addr.sin_addr.s_addr,
1569 volp ? volp->namep : "(unknown)");
1573 osi_Log3(afsd_logp, "Bad merge, scp %x, scp dv %d, RPC dv %d",
1574 scp, scp->dataVersion, dataVersion);
1575 /* we have a number of data fetch/store operations running
1576 * concurrently, and we can tell which one executed last at the
1577 * server by its mtime.
1578 * Choose the one with the largest mtime, and ignore the rest.
1580 * These concurrent calls are incompatible with setting the
1581 * mtime, so we won't have a locally changed mtime here.
1583 * We could also have ACL info for a different user than usual,
1584 * in which case we have to do that part of the merge, anyway.
1585 * We won't have to worry about the info being old, since we
1586 * won't have concurrent calls
1587 * that change file status running from this machine.
1589 * Added 3/17/98: if we see data version regression on an RO
1590 * file, it's probably due to a server holding an out-of-date
1591 * replica, rather than to concurrent RPC's. Failures to
1592 * release replicas are now flagged by the volserver, but only
1593 * since AFS 3.4 5.22, so there are plenty of clients getting
1594 * out-of-date replicas out there.
1596 * If we discover an out-of-date replica, by this time it's too
1597 * late to go to another server and retry. Also, we can't
1598 * reject the merge, because then there is no way for
1599 * GetAccess to do its work, and the caller gets into an
1600 * infinite loop. So we just grin and bear it.
1602 if (!(scp->flags & CM_SCACHEFLAG_RO))
1606 scp->serverModTime = statusp->ServerModTime;
1608 if (!(scp->mask & CM_SCACHEMASK_CLIENTMODTIME)) {
1609 scp->clientModTime = statusp->ClientModTime;
1611 if (!(scp->mask & CM_SCACHEMASK_LENGTH)) {
1612 scp->length.LowPart = statusp->Length;
1613 scp->length.HighPart = statusp->Length_hi;
1616 scp->serverLength.LowPart = statusp->Length;
1617 scp->serverLength.HighPart = statusp->Length_hi;
1619 scp->linkCount = statusp->LinkCount;
1620 scp->owner = statusp->Owner;
1621 scp->group = statusp->Group;
1622 scp->unixModeBits = statusp->UnixModeBits & 07777;
1624 if (statusp->FileType == File)
1625 scp->fileType = CM_SCACHETYPE_FILE;
1626 else if (statusp->FileType == Directory)
1627 scp->fileType = CM_SCACHETYPE_DIRECTORY;
1628 else if (statusp->FileType == SymbolicLink) {
1629 if ((scp->unixModeBits & 0111) == 0)
1630 scp->fileType = CM_SCACHETYPE_MOUNTPOINT;
1632 scp->fileType = CM_SCACHETYPE_SYMLINK;
1635 osi_Log2(afsd_logp, "Merge, Invalid File Type (%d), scp %x", statusp->FileType, scp);
1636 scp->fileType = CM_SCACHETYPE_INVALID; /* invalid */
1638 /* and other stuff */
1639 scp->parentVnode = statusp->ParentVnode;
1640 scp->parentUnique = statusp->ParentUnique;
1642 /* and merge in the private acl cache info, if this is more than the public
1643 * info; merge in the public stuff in any case.
1645 scp->anyAccess = statusp->AnonymousAccess;
1647 if (userp != NULL) {
1648 cm_AddACLCache(scp, userp, statusp->CallerAccess);
1651 if (scp->dataVersion != 0 &&
1652 (!(flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && dataVersion != scp->dataVersion ||
1653 (flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && dataVersion - scp->dataVersion > 1)) {
1655 * We now know that all of the data buffers that we have associated
1656 * with this scp are invalid. Subsequent operations will go faster
1657 * if the buffers are removed from the hash tables.
1659 * We do not remove directory buffers if the dataVersion delta is 1 because
1660 * those version numbers will be updated as part of the directory operation.
1662 * We do not remove storedata buffers because they will still be valid.
1667 cm_buf_t *bp, *prevBp, *nextBp;
1669 lock_ObtainWrite(&buf_globalLock);
1670 i = BUF_FILEHASH(&scp->fid);
1671 for (bp = cm_data.buf_fileHashTablepp[i]; bp; bp=nextBp)
1673 nextBp = bp->fileHashp;
1675 * if the buffer belongs to this stat cache entry
1676 * and the buffer mutex can be obtained, check the
1677 * reference count and if it is zero, remove the buffer
1678 * from the hash tables. If there are references,
1679 * the buffer might be updated to the current version
1680 * so leave it in place.
1682 if (cm_FidCmp(&scp->fid, &bp->fid) == 0 &&
1683 lock_TryMutex(&bp->mx)) {
1684 if (bp->refCount == 0 &&
1685 !(bp->flags & CM_BUF_READING | CM_BUF_WRITING | CM_BUF_DIRTY)) {
1686 prevBp = bp->fileHashBackp;
1687 bp->fileHashBackp = bp->fileHashp = NULL;
1689 prevBp->fileHashp = nextBp;
1691 cm_data.buf_fileHashTablepp[i] = nextBp;
1693 nextBp->fileHashBackp = prevBp;
1695 j = BUF_HASH(&bp->fid, &bp->offset);
1696 lbpp = &(cm_data.buf_scacheHashTablepp[j]);
1697 for(tbp = *lbpp; tbp; lbpp = &tbp->hashp, tbp = *lbpp) {
1702 *lbpp = bp->hashp; /* hash out */
1705 bp->flags &= ~CM_BUF_INHASH;
1707 lock_ReleaseMutex(&bp->mx);
1710 lock_ReleaseWrite(&buf_globalLock);
1713 /* We maintain a range of buffer dataVersion values which are considered
1714 * valid. This avoids the need to update the dataVersion on each buffer
1715 * object during an uncontested storeData operation. As a result this
1716 * merge status no longer has performance characteristics derived from
1717 * the size of the file.
1719 if (((flags & CM_MERGEFLAG_STOREDATA) && dataVersion - scp->dataVersion > 1) ||
1720 (!(flags & CM_MERGEFLAG_STOREDATA) && scp->dataVersion != dataVersion) ||
1721 scp->bufDataVersionLow == 0)
1722 scp->bufDataVersionLow = dataVersion;
1724 scp->dataVersion = dataVersion;
1727 * If someone is waiting for status information, we can wake them up
1728 * now even though the entity that issued the FetchStatus may not
1729 * have completed yet.
1731 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS);
1734 /* note that our stat cache info is incorrect, so force us eventually
1735 * to stat the file again. There may be dirty data associated with
1736 * this vnode, and we want to preserve that information.
1738 * This function works by simply simulating a loss of the callback.
1740 * This function must be called with the scache locked.
1742 void cm_DiscardSCache(cm_scache_t *scp)
1744 lock_AssertWrite(&scp->rw);
1745 if (scp->cbServerp) {
1746 cm_PutServer(scp->cbServerp);
1747 scp->cbServerp = NULL;
1750 scp->flags &= ~CM_SCACHEFLAG_CALLBACK;
1751 cm_dnlcPurgedp(scp);
1752 cm_dnlcPurgevp(scp);
1753 cm_FreeAllACLEnts(scp);
1755 if (scp->fileType == CM_SCACHETYPE_DFSLINK)
1756 cm_VolStatus_Invalidate_DFS_Mapping(scp);
1758 /* Force mount points and symlinks to be re-evaluated */
1759 scp->mountPointStringp[0] = '\0';
1762 void cm_AFSFidFromFid(AFSFid *afsFidp, cm_fid_t *fidp)
1764 afsFidp->Volume = fidp->volume;
1765 afsFidp->Vnode = fidp->vnode;
1766 afsFidp->Unique = fidp->unique;
1769 #ifdef DEBUG_REFCOUNT
1770 void cm_HoldSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
1772 void cm_HoldSCacheNoLock(cm_scache_t *scp)
1777 osi_assertx(scp != NULL, "null cm_scache_t");
1778 lock_AssertAny(&cm_scacheLock);
1779 refCount = InterlockedIncrement(&scp->refCount);
1780 #ifdef DEBUG_REFCOUNT
1781 osi_Log2(afsd_logp,"cm_HoldSCacheNoLock scp 0x%p ref %d",scp, refCount);
1782 afsi_log("%s:%d cm_HoldSCacheNoLock scp 0x%p, ref %d", file, line, scp, refCount);
1786 #ifdef DEBUG_REFCOUNT
1787 void cm_HoldSCacheDbg(cm_scache_t *scp, char * file, long line)
1789 void cm_HoldSCache(cm_scache_t *scp)
1794 osi_assertx(scp != NULL, "null cm_scache_t");
1795 lock_ObtainRead(&cm_scacheLock);
1796 refCount = InterlockedIncrement(&scp->refCount);
1797 #ifdef DEBUG_REFCOUNT
1798 osi_Log2(afsd_logp,"cm_HoldSCache scp 0x%p ref %d",scp, refCount);
1799 afsi_log("%s:%d cm_HoldSCache scp 0x%p ref %d", file, line, scp, refCount);
1801 lock_ReleaseRead(&cm_scacheLock);
1804 #ifdef DEBUG_REFCOUNT
1805 void cm_ReleaseSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
1807 void cm_ReleaseSCacheNoLock(cm_scache_t *scp)
1812 osi_assertx(scp != NULL, "null cm_scache_t");
1813 lock_AssertAny(&cm_scacheLock);
1815 refCount = InterlockedDecrement(&scp->refCount);
1816 #ifdef DEBUG_REFCOUNT
1818 osi_Log1(afsd_logp,"cm_ReleaseSCacheNoLock about to panic scp 0x%x",scp);
1820 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
1821 #ifdef DEBUG_REFCOUNT
1822 osi_Log2(afsd_logp,"cm_ReleaseSCacheNoLock scp 0x%p ref %d",scp, refCount);
1823 afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, refCount);
1826 if (refCount == 0 && (scp->flags & CM_SCACHEFLAG_DELETED)) {
1830 lockstate = lock_GetRWLockState(&cm_scacheLock);
1831 if (lockstate != OSI_RWLOCK_WRITEHELD)
1832 lock_ReleaseRead(&cm_scacheLock);
1834 lock_ReleaseWrite(&cm_scacheLock);
1836 lock_ObtainWrite(&scp->rw);
1837 if (scp->flags & CM_SCACHEFLAG_DELETED)
1840 if (refCount == 0 && deleted) {
1841 lock_ObtainWrite(&cm_scacheLock);
1842 cm_RecycleSCache(scp, 0);
1843 if (lockstate != OSI_RWLOCK_WRITEHELD)
1844 lock_ConvertWToR(&cm_scacheLock);
1846 if (lockstate != OSI_RWLOCK_WRITEHELD)
1847 lock_ObtainRead(&cm_scacheLock);
1849 lock_ObtainWrite(&cm_scacheLock);
1851 lock_ReleaseWrite(&scp->rw);
1855 #ifdef DEBUG_REFCOUNT
1856 void cm_ReleaseSCacheDbg(cm_scache_t *scp, char * file, long line)
1858 void cm_ReleaseSCache(cm_scache_t *scp)
1863 osi_assertx(scp != NULL, "null cm_scache_t");
1864 lock_ObtainRead(&cm_scacheLock);
1865 refCount = InterlockedDecrement(&scp->refCount);
1866 #ifdef DEBUG_REFCOUNT
1868 osi_Log1(afsd_logp,"cm_ReleaseSCache about to panic scp 0x%x",scp);
1870 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
1871 #ifdef DEBUG_REFCOUNT
1872 osi_Log2(afsd_logp,"cm_ReleaseSCache scp 0x%p ref %d",scp, refCount);
1873 afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, refCount);
1875 lock_ReleaseRead(&cm_scacheLock);
1877 if (scp->flags & CM_SCACHEFLAG_DELETED) {
1879 lock_ObtainWrite(&scp->rw);
1880 if (scp->flags & CM_SCACHEFLAG_DELETED)
1883 lock_ObtainWrite(&cm_scacheLock);
1884 cm_RecycleSCache(scp, 0);
1885 lock_ReleaseWrite(&cm_scacheLock);
1887 lock_ReleaseWrite(&scp->rw);
1891 /* just look for the scp entry to get filetype */
1892 /* doesn't need to be perfectly accurate, so locking doesn't matter too much */
1893 int cm_FindFileType(cm_fid_t *fidp)
1898 hash = CM_SCACHE_HASH(fidp);
1900 osi_assertx(fidp->cell != 0, "unassigned cell value");
1902 lock_ObtainWrite(&cm_scacheLock);
1903 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
1904 if (cm_FidCmp(fidp, &scp->fid) == 0) {
1905 lock_ReleaseWrite(&cm_scacheLock);
1906 return scp->fileType;
1909 lock_ReleaseWrite(&cm_scacheLock);
1913 /* dump all scp's that have reference count > 0 to a file.
1914 * cookie is used to identify this batch for easy parsing,
1915 * and it a string provided by a caller
1917 int cm_DumpSCache(FILE *outputFile, char *cookie, int lock)
1926 lock_ObtainRead(&cm_scacheLock);
1928 sprintf(output, "%s - dumping all scache - cm_data.currentSCaches=%d, cm_data.maxSCaches=%d\r\n", cookie, cm_data.currentSCaches, cm_data.maxSCaches);
1929 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1931 for (scp = cm_data.allSCachesp; scp; scp = scp->allNextp)
1933 sprintf(output, "%s scp=0x%p, fid (cell=%d, volume=%d, vnode=%d, unique=%d) type=%d dv=%I64d len=0x%I64x mp='%s' Locks (server=0x%x shared=%d excl=%d clnt=%d) flags=0x%x cb=0x%x refCount=%u\r\n",
1934 cookie, scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
1935 scp->fileType, scp->dataVersion, scp->length.QuadPart, scp->mountPointStringp,
1936 scp->serverLock, scp->sharedLocks, scp->exclusiveLocks, scp->clientLocks,
1937 scp->flags, (unsigned long)scp->cbExpires, scp->refCount);
1938 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1940 if (scp->fileLocksH) {
1941 sprintf(output, " %s - begin dumping scp locks\r\n", cookie);
1942 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1944 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
1945 cm_file_lock_t * lockp = (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
1946 sprintf(output, " %s lockp=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",
1947 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
1948 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
1949 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1952 sprintf(output, " %s - done dumping scp locks\r\n", cookie);
1953 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1957 sprintf(output, "%s - Done dumping all scache.\r\n", cookie);
1958 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1959 sprintf(output, "%s - dumping cm_data.scacheHashTable - cm_data.scacheHashTableSize=%d\r\n", cookie, cm_data.scacheHashTableSize);
1960 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1962 for (i = 0; i < cm_data.scacheHashTableSize; i++)
1964 for(scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp)
1966 sprintf(output, "%s scp=0x%p, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d)\r\n",
1967 cookie, scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1968 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1972 sprintf(output, "%s - Done dumping cm_data.scacheHashTable\r\n", cookie);
1973 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1975 sprintf(output, "%s - begin dumping all file locks\r\n", cookie);
1976 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1978 for (q = cm_allFileLocks; q; q = osi_QNext(q)) {
1979 cm_file_lock_t * lockp = (cm_file_lock_t *)q;
1980 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",
1981 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
1982 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
1983 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1986 sprintf(output, "%s - done dumping all file locks\r\n", cookie);
1987 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1990 lock_ReleaseRead(&cm_scacheLock);