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 */
79 void cm_ResetSCacheDirectory(cm_scache_t *scp)
82 /* destroy directory Bplus Tree */
84 LARGE_INTEGER start, end;
85 QueryPerformanceCounter(&start);
87 freeBtree(scp->dirBplus);
89 QueryPerformanceCounter(&end);
91 bplus_free_time += (end.QuadPart - start.QuadPart);
96 /* called with cm_scacheLock and scp write-locked; recycles an existing scp. */
97 long cm_RecycleSCache(cm_scache_t *scp, afs_int32 flags)
99 if (scp->refCount != 0) {
103 if (scp->flags & CM_SCACHEFLAG_SMB_FID) {
104 osi_Log1(afsd_logp,"cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected scp 0x%p", scp);
106 osi_panic("cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected",__FILE__,__LINE__);
111 cm_RemoveSCacheFromHashTable(scp);
114 if (flags & CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS) {
115 osi_queueData_t *qdp;
118 while(qdp = scp->bufWritesp) {
119 bufp = osi_GetQData(qdp);
120 osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
123 lock_ObtainMutex(&bufp->mx);
124 bufp->cmFlags &= ~CM_BUF_CMSTORING;
125 bufp->flags &= ~CM_BUF_DIRTY;
126 bufp->dirty_offset = 0;
127 bufp->dirty_length = 0;
128 bufp->flags |= CM_BUF_ERROR;
129 bufp->error = VNOVNODE;
130 bufp->dataVersion = -1; /* bad */
131 bufp->dirtyCounter++;
132 if (bufp->flags & CM_BUF_WAITING) {
133 osi_Log2(afsd_logp, "CM RecycleSCache Waking [scp 0x%x] bufp 0x%x", scp, bufp);
134 osi_Wakeup((long) &bufp);
136 lock_ReleaseMutex(&bufp->mx);
140 while(qdp = scp->bufReadsp) {
141 bufp = osi_GetQData(qdp);
142 osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
145 lock_ObtainMutex(&bufp->mx);
146 bufp->cmFlags &= ~CM_BUF_CMFETCHING;
147 bufp->flags &= ~CM_BUF_DIRTY;
148 bufp->dirty_offset = 0;
149 bufp->dirty_length = 0;
150 bufp->flags |= CM_BUF_ERROR;
151 bufp->error = VNOVNODE;
152 bufp->dataVersion = -1; /* bad */
153 bufp->dirtyCounter++;
154 if (bufp->flags & CM_BUF_WAITING) {
155 osi_Log2(afsd_logp, "CM RecycleSCache Waking [scp 0x%x] bufp 0x%x", scp, bufp);
156 osi_Wakeup((long) &bufp);
158 lock_ReleaseMutex(&bufp->mx);
162 buf_CleanDirtyBuffers(scp);
164 /* look for things that shouldn't still be set */
165 osi_assertx(scp->bufWritesp == NULL, "non-null cm_scache_t bufWritesp");
166 osi_assertx(scp->bufReadsp == NULL, "non-null cm_scache_t bufReadsp");
170 /* invalidate so next merge works fine;
171 * also initialize some flags */
173 scp->flags &= ~(CM_SCACHEFLAG_STATD
174 | CM_SCACHEFLAG_DELETED
176 | CM_SCACHEFLAG_PURERO
177 | CM_SCACHEFLAG_OVERQUOTA
178 | CM_SCACHEFLAG_OUTOFSPACE
179 | CM_SCACHEFLAG_EACCESS);
180 scp->serverModTime = 0;
181 scp->dataVersion = 0;
182 scp->bufDataVersionLow = 0;
183 scp->bulkStatProgress = hzero;
185 scp->waitQueueT = NULL;
187 if (scp->cbServerp) {
188 cm_PutServer(scp->cbServerp);
189 scp->cbServerp = NULL;
199 /* remove from dnlc */
203 /* discard cached status; if non-zero, Close
204 * tried to store this to server but failed */
207 /* discard symlink info */
208 scp->mountPointStringp[0] = '\0';
209 memset(&scp->mountRootFid, 0, sizeof(cm_fid_t));
210 memset(&scp->dotdotFid, 0, sizeof(cm_fid_t));
212 /* reset locking info */
213 scp->fileLocksH = NULL;
214 scp->fileLocksT = NULL;
215 scp->serverLock = (-1);
216 scp->exclusiveLocks = 0;
217 scp->sharedLocks = 0;
218 scp->lockDataVersion = -1;
220 /* not locked, but there can be no references to this guy
221 * while we hold the global refcount lock.
223 cm_FreeAllACLEnts(scp);
225 cm_ResetSCacheDirectory(scp);
231 * called with cm_scacheLock write-locked; find a vnode to recycle.
232 * Can allocate a new one if desperate, or if below quota (cm_data.maxSCaches).
233 * returns scp->mx held.
235 cm_scache_t *cm_GetNewSCache(void)
240 lock_AssertWrite(&cm_scacheLock);
242 /* first pass - look for deleted objects */
243 for ( scp = cm_data.scacheLRULastp;
245 scp = (cm_scache_t *) osi_QPrev(&scp->q))
247 osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
248 "invalid cm_scache_t address");
250 if (scp->refCount == 0) {
251 if (scp->flags & CM_SCACHEFLAG_DELETED) {
252 if (!lock_TryWrite(&scp->rw))
255 osi_Log1(afsd_logp, "GetNewSCache attempting to recycle deleted scp 0x%x", scp);
256 if (!cm_RecycleSCache(scp, CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS)) {
258 /* we found an entry, so return it */
259 /* now remove from the LRU queue and put it back at the
260 * head of the LRU queue.
262 cm_AdjustScacheLRU(scp);
267 lock_ReleaseWrite(&scp->rw);
268 osi_Log1(afsd_logp, "GetNewSCache recycled failed scp 0x%x", scp);
269 } else if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
270 if (!lock_TryWrite(&scp->rw))
273 /* we found an entry, so return it */
274 /* now remove from the LRU queue and put it back at the
275 * head of the LRU queue.
277 cm_AdjustScacheLRU(scp);
284 osi_Log0(afsd_logp, "GetNewSCache no deleted or recycled entries available for reuse");
287 if (cm_data.currentSCaches >= cm_data.maxSCaches) {
288 /* There were no deleted scache objects that we could use. Try to find
289 * one that simply hasn't been used in a while.
291 for ( scp = cm_data.scacheLRULastp;
293 scp = (cm_scache_t *) osi_QPrev(&scp->q))
295 /* It is possible for the refCount to be zero and for there still
296 * to be outstanding dirty buffers. If there are dirty buffers,
297 * we must not recycle the scp. */
298 if (scp->refCount == 0 && scp->bufReadsp == NULL && scp->bufWritesp == NULL) {
299 if (!buf_DirtyBuffersExist(&scp->fid)) {
300 if (!lock_TryWrite(&scp->rw))
303 if (!cm_RecycleSCache(scp, 0)) {
304 /* we found an entry, so return it */
305 /* now remove from the LRU queue and put it back at the
306 * head of the LRU queue.
308 cm_AdjustScacheLRU(scp);
313 lock_ReleaseWrite(&scp->rw);
315 osi_Log1(afsd_logp,"GetNewSCache dirty buffers exist scp 0x%x", scp);
319 osi_Log1(afsd_logp, "GetNewSCache all scache entries in use (retry = %d)", retry);
324 /* if we get here, we should allocate a new scache entry. We either are below
325 * quota or we have a leak and need to allocate a new one to avoid panicing.
327 scp = cm_data.scacheBaseAddress + cm_data.currentSCaches;
328 osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
329 "invalid cm_scache_t address");
330 memset(scp, 0, sizeof(cm_scache_t));
331 scp->magic = CM_SCACHE_MAGIC;
332 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
333 osi_assertx(lock_TryWrite(&scp->rw), "cm_scache_t rw held after allocation");
334 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
336 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
338 scp->serverLock = -1;
340 /* and put it in the LRU queue */
341 osi_QAdd((osi_queue_t **) &cm_data.scacheLRUFirstp, &scp->q);
342 if (!cm_data.scacheLRULastp)
343 cm_data.scacheLRULastp = scp;
344 cm_data.currentSCaches++;
345 cm_dnlcPurgedp(scp); /* make doubly sure that this is not in dnlc */
347 scp->allNextp = cm_data.allSCachesp;
348 cm_data.allSCachesp = scp;
352 void cm_SetFid(cm_fid_t *fidp, afs_uint32 cell, afs_uint32 volume, afs_uint32 vnode, afs_uint32 unique)
355 fidp->volume = volume;
357 fidp->unique = unique;
358 fidp->hash = ((cell & 0xF) << 28) | ((volume & 0x3F) << 22) | ((vnode & 0x7FF) << 11) | (unique & 0x7FF);
361 /* like strcmp, only for fids */
362 __inline int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
364 if (ap->hash != bp->hash)
366 if (ap->vnode != bp->vnode)
368 if (ap->volume != bp->volume)
370 if (ap->unique != bp->unique)
372 if (ap->cell != bp->cell)
377 void cm_fakeSCacheInit(int newFile)
380 memset(&cm_data.fakeSCache, 0, sizeof(cm_scache_t));
381 cm_data.fakeSCache.cbServerp = (struct cm_server *)(-1);
382 /* can leave clientModTime at 0 */
383 cm_data.fakeSCache.fileType = CM_SCACHETYPE_FILE;
384 cm_data.fakeSCache.unixModeBits = 0777;
385 cm_data.fakeSCache.length.LowPart = 1000;
386 cm_data.fakeSCache.linkCount = 1;
387 cm_data.fakeSCache.refCount = 1;
389 lock_InitializeRWLock(&cm_data.fakeSCache.rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
393 cm_ValidateSCache(void)
395 cm_scache_t * scp, *lscp;
398 if ( cm_data.scacheLRUFirstp == NULL && cm_data.scacheLRULastp != NULL ||
399 cm_data.scacheLRUFirstp != NULL && cm_data.scacheLRULastp == NULL) {
400 afsi_log("cm_ValidateSCache failure: inconsistent LRU pointers");
401 fprintf(stderr, "cm_ValidateSCache failure: inconsistent LRU pointers\n");
405 for ( scp = cm_data.scacheLRUFirstp, lscp = NULL, i = 0;
407 lscp = scp, scp = (cm_scache_t *) osi_QNext(&scp->q), i++ ) {
408 if (scp->magic != CM_SCACHE_MAGIC) {
409 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
410 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
413 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
414 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
415 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
418 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
419 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
420 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
423 if (i > cm_data.currentSCaches ) {
424 afsi_log("cm_ValidateSCache failure: LRU First queue loops");
425 fprintf(stderr, "cm_ValidateSCache failure: LUR First queue loops\n");
428 if (lscp != (cm_scache_t *) osi_QPrev(&scp->q)) {
429 afsi_log("cm_ValidateSCache failure: QPrev(scp) != previous");
430 fprintf(stderr, "cm_ValidateSCache failure: QPrev(scp) != previous\n");
435 for ( scp = cm_data.scacheLRULastp, lscp = NULL, i = 0; scp;
436 lscp = scp, scp = (cm_scache_t *) osi_QPrev(&scp->q), i++ ) {
437 if (scp->magic != CM_SCACHE_MAGIC) {
438 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
439 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
442 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
443 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
444 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
447 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
448 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
449 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
452 if (i > cm_data.currentSCaches ) {
453 afsi_log("cm_ValidateSCache failure: LRU Last queue loops");
454 fprintf(stderr, "cm_ValidateSCache failure: LUR Last queue loops\n");
457 if (lscp != (cm_scache_t *) osi_QNext(&scp->q)) {
458 afsi_log("cm_ValidateSCache failure: QNext(scp) != next");
459 fprintf(stderr, "cm_ValidateSCache failure: QNext(scp) != next\n");
464 for ( i=0; i < cm_data.scacheHashTableSize; i++ ) {
465 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
467 hash = CM_SCACHE_HASH(&scp->fid);
468 if (scp->magic != CM_SCACHE_MAGIC) {
469 afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
470 fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
473 if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
474 afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
475 fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
478 if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
479 afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
480 fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
484 afsi_log("cm_ValidateSCache failure: scp hash != hash index");
485 fprintf(stderr, "cm_ValidateSCache failure: scp hash != hash index\n");
491 return cm_dnlcValidate();
495 cm_SuspendSCache(void)
500 cm_GiveUpAllCallbacksAllServers(TRUE);
503 * After this call all servers are marked down.
504 * Do not clear the callbacks, instead change the
505 * expiration time so that the callbacks will be expired
506 * when the servers are marked back up. However, we
507 * want the callbacks to be preserved as long as the
508 * servers are down. That way if the machine resumes
509 * without network, the stat cache item will still be
514 lock_ObtainWrite(&cm_scacheLock);
515 for ( scp = cm_data.allSCachesp; scp; scp = scp->allNextp ) {
516 if (scp->cbServerp) {
517 if (scp->flags & CM_SCACHEFLAG_PURERO) {
518 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
520 if (volp->cbExpiresRO == scp->cbExpires)
521 volp->cbExpiresRO = now+1;
525 scp->cbExpires = now+1;
528 lock_ReleaseWrite(&cm_scacheLock);
532 cm_ShutdownSCache(void)
536 lock_ObtainWrite(&cm_scacheLock);
538 for ( scp = cm_data.allSCachesp; scp;
539 scp = scp->allNextp ) {
540 if (scp->randomACLp) {
541 lock_ReleaseWrite(&cm_scacheLock);
542 lock_ObtainWrite(&scp->rw);
543 lock_ObtainWrite(&cm_scacheLock);
544 cm_FreeAllACLEnts(scp);
545 lock_ReleaseWrite(&scp->rw);
548 if (scp->cbServerp) {
549 cm_PutServer(scp->cbServerp);
550 scp->cbServerp = NULL;
553 scp->flags &= ~CM_SCACHEFLAG_CALLBACK;
557 freeBtree(scp->dirBplus);
558 scp->dirBplus = NULL;
559 scp->dirDataVersion = -1;
560 lock_FinalizeRWLock(&scp->dirlock);
562 lock_FinalizeRWLock(&scp->rw);
563 lock_FinalizeRWLock(&scp->bufCreateLock);
565 lock_ReleaseWrite(&cm_scacheLock);
567 cm_GiveUpAllCallbacksAllServers(FALSE);
569 return cm_dnlcShutdown();
572 void cm_InitSCache(int newFile, long maxSCaches)
574 static osi_once_t once;
576 if (osi_Once(&once)) {
577 lock_InitializeRWLock(&cm_scacheLock, "cm_scacheLock", LOCK_HIERARCHY_SCACHE_GLOBAL);
579 memset(cm_data.scacheHashTablep, 0, sizeof(cm_scache_t *) * cm_data.scacheHashTableSize);
580 cm_data.allSCachesp = NULL;
581 cm_data.currentSCaches = 0;
582 cm_data.maxSCaches = maxSCaches;
583 cm_data.scacheLRUFirstp = cm_data.scacheLRULastp = NULL;
587 for ( scp = cm_data.allSCachesp; scp;
588 scp = scp->allNextp ) {
589 lock_InitializeRWLock(&scp->rw, "cm_scache_t rw", LOCK_HIERARCHY_SCACHE);
590 lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock", LOCK_HIERARCHY_SCACHE_BUFCREATE);
592 lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock", LOCK_HIERARCHY_SCACHE_DIRLOCK);
594 scp->cbServerp = NULL;
596 scp->fileLocksH = NULL;
597 scp->fileLocksT = NULL;
598 scp->serverLock = (-1);
599 scp->lastRefreshCycle = 0;
600 scp->exclusiveLocks = 0;
601 scp->sharedLocks = 0;
608 scp->dirBplus = NULL;
609 scp->dirDataVersion = -1;
611 scp->waitQueueT = NULL;
612 scp->flags &= ~CM_SCACHEFLAG_WAITING;
615 cm_allFileLocks = NULL;
616 cm_freeFileLocks = NULL;
617 cm_lockRefreshCycle = 0;
618 cm_fakeSCacheInit(newFile);
619 cm_allFreeWaiters = NULL;
620 cm_dnlcInit(newFile);
625 /* version that doesn't bother creating the entry if we don't find it */
626 cm_scache_t *cm_FindSCache(cm_fid_t *fidp)
631 hash = CM_SCACHE_HASH(fidp);
633 if (fidp->cell == 0) {
637 lock_ObtainRead(&cm_scacheLock);
638 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
639 if (cm_FidCmp(fidp, &scp->fid) == 0) {
640 cm_HoldSCacheNoLock(scp);
641 lock_ConvertRToW(&cm_scacheLock);
642 cm_AdjustScacheLRU(scp);
643 lock_ReleaseWrite(&cm_scacheLock);
647 lock_ReleaseRead(&cm_scacheLock);
651 #ifdef DEBUG_REFCOUNT
652 long cm_GetSCacheDbg(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
653 cm_req_t *reqp, char * file, long line)
655 long cm_GetSCache(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
660 cm_scache_t *scp = NULL;
662 cm_volume_t *volp = NULL;
664 int special = 0; // yj: boolean variable to test if file is on root.afs
666 extern cm_fid_t cm_rootFid;
668 hash = CM_SCACHE_HASH(fidp);
670 osi_assertx(fidp->cell != 0, "unassigned cell value");
672 #ifdef AFS_FREELANCE_CLIENT
673 special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
674 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
675 !(fidp->vnode==0x1 && fidp->unique==0x1));
676 isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
677 fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
678 fidp->vnode==0x1 && fidp->unique==0x1);
681 // yj: check if we have the scp, if so, we don't need
682 // to do anything else
683 lock_ObtainWrite(&cm_scacheLock);
684 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
685 if (cm_FidCmp(fidp, &scp->fid) == 0) {
686 #ifdef DEBUG_REFCOUNT
687 afsi_log("%s:%d cm_GetSCache (1) scp 0x%p ref %d", file, line, scp, scp->refCount);
688 osi_Log1(afsd_logp,"cm_GetSCache (1) scp 0x%p", scp);
690 #ifdef AFS_FREELANCE_CLIENT
691 if (cm_freelanceEnabled && special &&
692 cm_data.fakeDirVersion != scp->dataVersion)
695 cm_HoldSCacheNoLock(scp);
697 cm_AdjustScacheLRU(scp);
698 lock_ReleaseWrite(&cm_scacheLock);
703 // yj: when we get here, it means we don't have an scp
704 // so we need to either load it or fake it, depending
705 // on whether the file is "special", see below.
707 // yj: if we're trying to get an scp for a file that's
708 // on root.afs of homecell, we want to handle it specially
709 // because we have to fill in the status stuff 'coz we
710 // don't want trybulkstat to fill it in for us
711 #ifdef AFS_FREELANCE_CLIENT
712 if (cm_freelanceEnabled && isRoot) {
713 osi_Log0(afsd_logp,"cm_GetSCache Freelance and isRoot");
714 /* freelance: if we are trying to get the root scp for the first
715 * time, we will just put in a place holder entry.
720 if (cm_freelanceEnabled && special) {
721 char mp[MOUNTPOINTLEN] = "";
724 lock_ReleaseWrite(&cm_scacheLock);
725 osi_Log0(afsd_logp,"cm_GetSCache Freelance and special");
727 if (cm_getLocalMountPointChange()) { // check for changes
728 cm_clearLocalMountPointChange(); // clear the changefile
729 cm_reInitLocalMountPoints(); // start reinit
732 lock_ObtainMutex(&cm_Freelance_Lock);
733 if (fidp->vnode >= 2 && fidp->vnode - 2 < cm_noLocalMountPoints) {
734 strncpy(mp,(cm_localMountPoints+fidp->vnode-2)->mountPointStringp, MOUNTPOINTLEN);
735 mp[MOUNTPOINTLEN-1] = '\0';
736 if ( !strnicmp(mp, "msdfs:", strlen("msdfs:")) )
737 fileType = CM_SCACHETYPE_DFSLINK;
739 fileType = (cm_localMountPoints+fidp->vnode-2)->fileType;
741 fileType = CM_SCACHETYPE_INVALID;
744 lock_ReleaseMutex(&cm_Freelance_Lock);
745 lock_ObtainWrite(&cm_scacheLock);
747 scp = cm_GetNewSCache(); /* returns scp->rw held */
749 osi_Log0(afsd_logp,"cm_GetSCache unable to obtain *new* scache entry");
750 lock_ReleaseWrite(&cm_scacheLock);
751 return CM_ERROR_WOULDBLOCK;
754 lock_ReleaseWrite(&cm_scacheLock);
755 lock_ObtainWrite(&scp->rw);
756 lock_ObtainWrite(&cm_scacheLock);
759 scp->dotdotFid.cell=AFS_FAKE_ROOT_CELL_ID;
760 scp->dotdotFid.volume=AFS_FAKE_ROOT_VOL_ID;
761 scp->dotdotFid.unique=1;
762 scp->dotdotFid.vnode=1;
763 scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
764 if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
765 scp->nextp = cm_data.scacheHashTablep[hash];
766 cm_data.scacheHashTablep[hash] = scp;
767 scp->flags |= CM_SCACHEFLAG_INHASH;
770 osi_Log1(afsd_logp,"cm_GetSCache (freelance) sets refCount to 1 scp 0x%x", scp);
771 scp->fileType = fileType;
772 scp->length.LowPart = (DWORD)strlen(mp)+4;
773 scp->length.HighPart = 0;
774 strncpy(scp->mountPointStringp,mp,MOUNTPOINTLEN);
776 scp->unixModeBits=0777;
777 scp->clientModTime=FakeFreelanceModTime;
778 scp->serverModTime=FakeFreelanceModTime;
779 scp->parentUnique = 0x1;
780 scp->parentVnode=0x1;
782 scp->dataVersion=cm_data.fakeDirVersion;
783 scp->bufDataVersionLow=cm_data.fakeDirVersion;
784 scp->lockDataVersion=-1; /* no lock yet */
785 lock_ReleaseWrite(&scp->rw);
786 lock_ReleaseWrite(&cm_scacheLock);
788 #ifdef DEBUG_REFCOUNT
789 afsi_log("%s:%d cm_GetSCache (2) scp 0x%p ref %d", file, line, scp, scp->refCount);
790 osi_Log1(afsd_logp,"cm_GetSCache (2) scp 0x%p", scp);
795 #endif /* AFS_FREELANCE_CLIENT */
797 /* otherwise, we need to find the volume */
798 if (!cm_freelanceEnabled || !isRoot) {
799 lock_ReleaseWrite(&cm_scacheLock); /* for perf. reasons */
800 cellp = cm_FindCellByID(fidp->cell, 0);
802 return CM_ERROR_NOSUCHCELL;
804 code = cm_FindVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
807 lock_ObtainWrite(&cm_scacheLock);
810 /* otherwise, we have the volume, now reverify that the scp doesn't
811 * exist, and proceed.
813 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
814 if (cm_FidCmp(fidp, &scp->fid) == 0) {
815 #ifdef DEBUG_REFCOUNT
816 afsi_log("%s:%d cm_GetSCache (3) scp 0x%p ref %d", file, line, scp, scp->refCount);
817 osi_Log1(afsd_logp,"cm_GetSCache (3) scp 0x%p", scp);
819 cm_HoldSCacheNoLock(scp);
820 cm_AdjustScacheLRU(scp);
821 lock_ReleaseWrite(&cm_scacheLock);
829 /* now, if we don't have the fid, recycle something */
830 scp = cm_GetNewSCache(); /* returns scp->rw held */
832 osi_Log0(afsd_logp,"cm_GetNewSCache unable to obtain *new* scache entry");
833 lock_ReleaseWrite(&cm_scacheLock);
836 return CM_ERROR_WOULDBLOCK;
838 #ifdef DEBUG_REFCOUNT
839 afsi_log("%s:%d cm_GetNewSCache returns scp 0x%p flags 0x%x", file, line, scp, scp->flags);
841 osi_Log2(afsd_logp,"cm_GetNewSCache returns scp 0x%p flags 0x%x", scp, scp->flags);
843 osi_assertx(!(scp->flags & CM_SCACHEFLAG_INHASH), "CM_SCACHEFLAG_INHASH set");
846 if (!cm_freelanceEnabled || !isRoot) {
847 /* if this scache entry represents a volume root then we need
848 * to copy the dotdotFipd from the volume structure where the
849 * "master" copy is stored (defect 11489)
851 if (volp->vol[ROVOL].ID == fidp->volume) {
852 scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
853 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
854 scp->dotdotFid = cm_VolumeStateByType(volp, ROVOL)->dotdotFid;
855 } else if (volp->vol[BACKVOL].ID == fidp->volume) {
856 scp->flags |= CM_SCACHEFLAG_RO;
857 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
858 scp->dotdotFid = cm_VolumeStateByType(volp, BACKVOL)->dotdotFid;
860 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
861 scp->dotdotFid = cm_VolumeStateByType(volp, RWVOL)->dotdotFid;
866 scp->nextp = cm_data.scacheHashTablep[hash];
867 cm_data.scacheHashTablep[hash] = scp;
868 scp->flags |= CM_SCACHEFLAG_INHASH;
869 lock_ReleaseWrite(&scp->rw);
871 #ifdef DEBUG_REFCOUNT
872 afsi_log("%s:%d cm_GetSCache sets refCount to 1 scp 0x%x", file, line, scp);
874 osi_Log1(afsd_logp,"cm_GetSCache sets refCount to 1 scp 0x%x", scp);
876 /* XXX - The following fields in the cm_scache are
883 /* now we have a held scache entry; just return it */
885 #ifdef DEBUG_REFCOUNT
886 afsi_log("%s:%d cm_GetSCache (4) scp 0x%p ref %d", file, line, scp, scp->refCount);
887 osi_Log1(afsd_logp,"cm_GetSCache (4) scp 0x%p", scp);
889 lock_ReleaseWrite(&cm_scacheLock);
893 /* Returns a held reference to the scache's parent
895 cm_scache_t * cm_FindSCacheParent(cm_scache_t * scp)
900 cm_scache_t * pscp = NULL;
902 lock_ObtainWrite(&cm_scacheLock);
903 cm_SetFid(&parent_fid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
905 if (cm_FidCmp(&scp->fid, &parent_fid)) {
906 i = CM_SCACHE_HASH(&parent_fid);
907 for (pscp = cm_data.scacheHashTablep[i]; pscp; pscp = pscp->nextp) {
908 if (!cm_FidCmp(&pscp->fid, &parent_fid)) {
909 cm_HoldSCacheNoLock(pscp);
915 lock_ReleaseWrite(&cm_scacheLock);
920 void cm_SyncOpAddToWaitQueue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
922 cm_scache_waiter_t * w;
924 lock_ObtainWrite(&cm_scacheLock);
925 if (cm_allFreeWaiters == NULL) {
926 w = malloc(sizeof(*w));
927 memset(w, 0, sizeof(*w));
929 w = (cm_scache_waiter_t *) cm_allFreeWaiters;
930 osi_QRemove(&cm_allFreeWaiters, (osi_queue_t *) w);
933 w->threadId = thrd_Current();
935 cm_HoldSCacheNoLock(scp);
939 osi_QAddT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
940 lock_ReleaseWrite(&cm_scacheLock);
942 osi_Log2(afsd_logp, "cm_SyncOpAddToWaitQueue : Adding thread to wait queue scp 0x%p w 0x%p", scp, w);
945 int cm_SyncOpCheckContinue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
947 cm_scache_waiter_t * w;
950 osi_Log0(afsd_logp, "cm_SyncOpCheckContinue checking for continuation");
952 lock_ObtainRead(&cm_scacheLock);
953 for (w = (cm_scache_waiter_t *)scp->waitQueueH;
955 w = (cm_scache_waiter_t *)osi_QNext((osi_queue_t *) w)) {
956 if (w->flags == flags && w->bufp == bufp) {
961 osi_assertx(w != NULL, "null cm_scache_waiter_t");
962 this_is_me = (w->threadId == thrd_Current());
963 lock_ReleaseRead(&cm_scacheLock);
966 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue MISS: Waiter 0x%p", w);
970 osi_Log1(afsd_logp, "cm_SyncOpCheckContinue HIT: Waiter 0x%p", w);
972 lock_ObtainWrite(&cm_scacheLock);
973 osi_QRemoveHT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
974 cm_ReleaseSCacheNoLock(scp);
975 memset(w, 0, sizeof(*w));
976 osi_QAdd(&cm_allFreeWaiters, (osi_queue_t *) w);
977 lock_ReleaseWrite(&cm_scacheLock);
983 /* synchronize a fetch, store, read, write, fetch status or store status.
984 * Called with scache mutex held, and returns with it held, but temporarily
985 * drops it during the fetch.
987 * At most one flag can be on in flags, if this is an RPC request.
989 * Also, if we're fetching or storing data, we must ensure that we have a buffer.
991 * There are a lot of weird restrictions here; here's an attempt to explain the
992 * rationale for the concurrency restrictions implemented in this function.
994 * First, although the file server will break callbacks when *another* machine
995 * modifies a file or status block, the client itself is responsible for
996 * concurrency control on its own requests. Callback breaking events are rare,
997 * and simply invalidate any concurrent new status info.
999 * In the absence of callback breaking messages, we need to know how to
1000 * synchronize incoming responses describing updates to files. We synchronize
1001 * operations that update the data version by comparing the data versions.
1002 * However, updates that do not update the data, but only the status, can't be
1003 * synchronized with fetches or stores, since there's nothing to compare
1004 * to tell which operation executed first at the server.
1006 * Thus, we can allow multiple ops that change file data, or dir data, and
1007 * fetches. However, status storing ops have to be done serially.
1009 * Furthermore, certain data-changing ops are incompatible: we can't read or
1010 * write a buffer while doing a truncate. We can't read and write the same
1011 * buffer at the same time, or write while fetching or storing, or read while
1012 * fetching a buffer (this may change). We can't fetch and store at the same
1015 * With respect to status, we can't read and write at the same time, read while
1016 * fetching, write while fetching or storing, or fetch and store at the same time.
1018 * We can't allow a get callback RPC to run in concurrently with something that
1019 * will return updated status, since we could start a call, have the server
1020 * return status, have another machine make an update to the status (which
1021 * doesn't change serverModTime), have the original machine get a new callback,
1022 * and then have the original machine merge in the early, old info from the
1023 * first call. At this point, the easiest way to avoid this problem is to have
1024 * getcallback calls conflict with all others for the same vnode. Other calls
1025 * to cm_MergeStatus that aren't associated with calls to cm_SyncOp on the same
1026 * vnode must be careful not to merge in their status unless they have obtained
1027 * a callback from the start of their call.
1029 * Note added 1/23/96
1030 * Concurrent StoreData RPC's can cause trouble if the file is being extended.
1031 * Each such RPC passes a FileLength parameter, which the server uses to do
1032 * pre-truncation if necessary. So if two RPC's are processed out of order at
1033 * the server, the one with the smaller FileLength will be processed last,
1034 * possibly resulting in a bogus truncation. The simplest way to avoid this
1035 * is to serialize all StoreData RPC's. This is the reason we defined
1036 * CM_SCACHESYNC_STOREDATA_EXCL and CM_SCACHEFLAG_DATASTORING.
1038 long cm_SyncOp(cm_scache_t *scp, cm_buf_t *bufp, cm_user_t *userp, cm_req_t *reqp,
1039 afs_uint32 rights, afs_uint32 flags)
1041 osi_queueData_t *qdp;
1044 afs_uint32 outRights;
1046 afs_uint32 sleep_scp_flags = 0;
1047 afs_uint32 sleep_buf_cmflags = 0;
1048 afs_uint32 sleep_scp_bufs = 0;
1051 lock_AssertWrite(&scp->rw);
1053 /* lookup this first */
1054 bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
1057 osi_assertx(bufp->refCount > 0, "cm_buf_t refCount 0");
1060 /* Do the access check. Now we don't really do the access check
1061 * atomically, since the caller doesn't expect the parent dir to be
1062 * returned locked, and that is what we'd have to do to prevent a
1063 * callback breaking message on the parent due to a setacl call from
1064 * being processed while we're running. So, instead, we check things
1065 * here, and if things look fine with the access, we proceed to finish
1066 * the rest of this check. Sort of a hack, but probably good enough.
1070 if (flags & CM_SCACHESYNC_FETCHSTATUS) {
1071 /* if we're bringing in a new status block, ensure that
1072 * we aren't already doing so, and that no one is
1073 * changing the status concurrently, either. We need
1074 * to do this, even if the status is of a different
1075 * type, since we don't have the ability to figure out,
1076 * in the AFS 3 protocols, which status-changing
1077 * operation ran first, or even which order a read and
1078 * a write occurred in.
1080 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1081 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1082 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want FETCHSTATUS", scp);
1086 if (flags & (CM_SCACHESYNC_STORESIZE | CM_SCACHESYNC_STORESTATUS
1087 | CM_SCACHESYNC_SETSIZE | CM_SCACHESYNC_GETCALLBACK)) {
1088 /* if we're going to make an RPC to change the status, make sure
1089 * that no one is bringing in or sending out the status.
1091 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING |
1092 CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1093 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1096 if (scp->bufReadsp || scp->bufWritesp) {
1097 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is bufRead|bufWrite want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
1101 if (flags & CM_SCACHESYNC_FETCHDATA) {
1102 /* if we're bringing in a new chunk of data, make sure that
1103 * nothing is happening to that chunk, and that we aren't
1104 * changing the basic file status info, either.
1106 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1107 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1108 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want FETCHDATA", scp);
1111 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1112 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want FETCHDATA", scp, bufp);
1116 if (flags & CM_SCACHESYNC_STOREDATA) {
1117 /* same as fetch data */
1118 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1119 | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
1120 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STOREDATA", scp);
1123 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
1124 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want STOREDATA", scp, bufp);
1129 if (flags & CM_SCACHESYNC_STOREDATA_EXCL) {
1130 /* Don't allow concurrent StoreData RPC's */
1131 if (scp->flags & CM_SCACHEFLAG_DATASTORING) {
1132 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is DATASTORING want STOREDATA_EXCL", scp);
1137 if (flags & CM_SCACHESYNC_ASYNCSTORE) {
1138 /* Don't allow more than one BKG store request */
1139 if (scp->flags & CM_SCACHEFLAG_ASYNCSTORING) {
1140 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is ASYNCSTORING want ASYNCSTORE", scp);
1145 if (flags & CM_SCACHESYNC_LOCK) {
1146 /* Don't allow concurrent fiddling with lock lists */
1147 if (scp->flags & CM_SCACHEFLAG_LOCKING) {
1148 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is LOCKING want LOCK", scp);
1153 /* now the operations that don't correspond to making RPCs */
1154 if (flags & CM_SCACHESYNC_GETSTATUS) {
1155 /* we can use the status that's here, if we're not
1156 * bringing in new status.
1158 if (scp->flags & (CM_SCACHEFLAG_FETCHING)) {
1159 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want GETSTATUS", scp);
1163 if (flags & CM_SCACHESYNC_SETSTATUS) {
1164 /* we can make a change to the local status, as long as
1165 * the status isn't changing now.
1167 * If we're fetching or storing a chunk of data, we can
1168 * change the status locally, since the fetch/store
1169 * operations don't change any of the data that we're
1172 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESTORING)) {
1173 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING want SETSTATUS", scp);
1177 if (flags & CM_SCACHESYNC_READ) {
1178 /* we're going to read the data, make sure that the
1179 * status is available, and that the data is here. It
1180 * is OK to read while storing the data back.
1182 if (scp->flags & CM_SCACHEFLAG_FETCHING) {
1183 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want READ", scp);
1186 if (bufp && ((bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED)) == CM_BUF_CMFETCHING)) {
1187 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING want READ", scp, bufp);
1190 if (bufp && (bufp->cmFlags & CM_BUF_CMWRITING)) {
1191 osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMWRITING want READ", scp, bufp);
1195 if (flags & CM_SCACHESYNC_WRITE) {
1196 /* don't write unless the status is stable and the chunk
1199 if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
1200 | CM_SCACHEFLAG_SIZESTORING)) {
1201 osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING want WRITE", scp);
1204 if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING |
1206 CM_BUF_CMWRITING))) {
1207 osi_Log3(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is %s want WRITE",
1209 ((bufp->cmFlags & CM_BUF_CMFETCHING) ? "CM_BUF_CMFETCHING":
1210 ((bufp->cmFlags & CM_BUF_CMSTORING) ? "CM_BUF_CMSTORING" :
1211 ((bufp->cmFlags & CM_BUF_CMWRITING) ? "CM_BUF_CMWRITING" :
1217 // yj: modified this so that callback only checked if we're
1218 // not checking something on /afs
1219 /* fix the conditional to match the one in cm_HaveCallback */
1220 if ((flags & CM_SCACHESYNC_NEEDCALLBACK)
1221 #ifdef AFS_FREELANCE_CLIENT
1222 && (!cm_freelanceEnabled ||
1223 !(scp->fid.vnode==0x1 && scp->fid.unique==0x1) ||
1224 scp->fid.cell!=AFS_FAKE_ROOT_CELL_ID ||
1225 scp->fid.volume!=AFS_FAKE_ROOT_VOL_ID ||
1226 cm_fakeDirCallback < 2)
1227 #endif /* AFS_FREELANCE_CLIENT */
1229 if ((flags & CM_SCACHESYNC_FORCECB) || !cm_HaveCallback(scp)) {
1230 osi_Log1(afsd_logp, "CM SyncOp getting callback on scp 0x%p",
1233 lock_ReleaseMutex(&bufp->mx);
1234 code = cm_GetCallback(scp, userp, reqp, (flags & CM_SCACHESYNC_FORCECB)?1:0);
1236 lock_ReleaseWrite(&scp->rw);
1237 lock_ObtainMutex(&bufp->mx);
1238 lock_ObtainWrite(&scp->rw);
1242 flags &= ~CM_SCACHESYNC_FORCECB; /* only force once */
1248 /* can't check access rights without a callback */
1249 osi_assertx(flags & CM_SCACHESYNC_NEEDCALLBACK, "!CM_SCACHESYNC_NEEDCALLBACK");
1251 if ((rights & (PRSFS_WRITE|PRSFS_DELETE)) && (scp->flags & CM_SCACHEFLAG_RO))
1252 return CM_ERROR_READONLY;
1254 if (cm_HaveAccessRights(scp, userp, rights, &outRights)) {
1255 if (~outRights & rights)
1256 return CM_ERROR_NOACCESS;
1259 /* we don't know the required access rights */
1260 if (bufLocked) lock_ReleaseMutex(&bufp->mx);
1261 code = cm_GetAccessRights(scp, userp, reqp);
1263 lock_ReleaseWrite(&scp->rw);
1264 lock_ObtainMutex(&bufp->mx);
1265 lock_ObtainWrite(&scp->rw);
1273 /* if we get here, we're happy */
1277 /* first check if we're not supposed to wait: fail
1278 * in this case, returning with everything still locked.
1280 if (flags & CM_SCACHESYNC_NOWAIT)
1281 return CM_ERROR_WOULDBLOCK;
1283 /* These are used for minidump debugging */
1284 sleep_scp_flags = scp->flags; /* so we know why we slept */
1285 sleep_buf_cmflags = bufp ? bufp->cmFlags : 0;
1286 sleep_scp_bufs = (scp->bufReadsp ? 1 : 0) | (scp->bufWritesp ? 2 : 0);
1288 /* wait here, then try again */
1289 osi_Log1(afsd_logp, "CM SyncOp sleeping scp 0x%p", scp);
1290 if ( scp->flags & CM_SCACHEFLAG_WAITING ) {
1292 scp->waitRequests++;
1293 osi_Log3(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING already set for 0x%p; %d threads; %d requests",
1294 scp, scp->waitCount, scp->waitRequests);
1296 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING set for 0x%p", scp);
1297 scp->flags |= CM_SCACHEFLAG_WAITING;
1298 scp->waitCount = scp->waitRequests = 1;
1301 cm_SyncOpAddToWaitQueue(scp, flags, bufp);
1305 lock_ReleaseMutex(&bufp->mx);
1306 osi_SleepW((LONG_PTR) &scp->flags, &scp->rw);
1308 lock_ObtainMutex(&bufp->mx);
1309 lock_ObtainWrite(&scp->rw);
1310 } while (!cm_SyncOpCheckContinue(scp, flags, bufp));
1312 smb_UpdateServerPriority();
1315 osi_Log3(afsd_logp, "CM SyncOp woke! scp 0x%p; still waiting %d threads of %d requests",
1316 scp, scp->waitCount, scp->waitRequests);
1317 if (scp->waitCount == 0) {
1318 osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING reset for 0x%p", scp);
1319 scp->flags &= ~CM_SCACHEFLAG_WAITING;
1320 scp->waitRequests = 0;
1322 } /* big while loop */
1324 /* now, update the recorded state for RPC-type calls */
1325 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1326 scp->flags |= CM_SCACHEFLAG_FETCHING;
1327 if (flags & CM_SCACHESYNC_STORESTATUS)
1328 scp->flags |= CM_SCACHEFLAG_STORING;
1329 if (flags & CM_SCACHESYNC_STORESIZE)
1330 scp->flags |= CM_SCACHEFLAG_SIZESTORING;
1331 if (flags & CM_SCACHESYNC_GETCALLBACK)
1332 scp->flags |= CM_SCACHEFLAG_GETCALLBACK;
1333 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1334 scp->flags |= CM_SCACHEFLAG_DATASTORING;
1335 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1336 scp->flags |= CM_SCACHEFLAG_ASYNCSTORING;
1337 if (flags & CM_SCACHESYNC_LOCK)
1338 scp->flags |= CM_SCACHEFLAG_LOCKING;
1340 /* now update the buffer pointer */
1341 if (flags & CM_SCACHESYNC_FETCHDATA) {
1342 /* ensure that the buffer isn't already in the I/O list */
1344 for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1345 tbufp = osi_GetQData(qdp);
1346 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1350 /* queue a held reference to the buffer in the "reading" I/O list */
1351 qdp = osi_QDAlloc();
1352 osi_SetQData(qdp, bufp);
1355 bufp->cmFlags |= CM_BUF_CMFETCHING;
1357 osi_QAdd((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1360 if (flags & CM_SCACHESYNC_STOREDATA) {
1361 /* ensure that the buffer isn't already in the I/O list */
1363 for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1364 tbufp = osi_GetQData(qdp);
1365 osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
1369 /* queue a held reference to the buffer in the "writing" I/O list */
1370 qdp = osi_QDAlloc();
1371 osi_SetQData(qdp, bufp);
1374 bufp->cmFlags |= CM_BUF_CMSTORING;
1376 osi_QAdd((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1379 if (flags & CM_SCACHESYNC_WRITE) {
1380 /* mark the buffer as being written to. */
1382 bufp->cmFlags |= CM_BUF_CMWRITING;
1389 /* for those syncops that setup for RPCs.
1390 * Called with scache locked.
1392 void cm_SyncOpDone(cm_scache_t *scp, cm_buf_t *bufp, afs_uint32 flags)
1394 osi_queueData_t *qdp;
1397 lock_AssertWrite(&scp->rw);
1399 /* now, update the recorded state for RPC-type calls */
1400 if (flags & CM_SCACHESYNC_FETCHSTATUS)
1401 scp->flags &= ~CM_SCACHEFLAG_FETCHING;
1402 if (flags & CM_SCACHESYNC_STORESTATUS)
1403 scp->flags &= ~CM_SCACHEFLAG_STORING;
1404 if (flags & CM_SCACHESYNC_STORESIZE)
1405 scp->flags &= ~CM_SCACHEFLAG_SIZESTORING;
1406 if (flags & CM_SCACHESYNC_GETCALLBACK)
1407 scp->flags &= ~CM_SCACHEFLAG_GETCALLBACK;
1408 if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
1409 scp->flags &= ~CM_SCACHEFLAG_DATASTORING;
1410 if (flags & CM_SCACHESYNC_ASYNCSTORE)
1411 scp->flags &= ~CM_SCACHEFLAG_ASYNCSTORING;
1412 if (flags & CM_SCACHESYNC_LOCK)
1413 scp->flags &= ~CM_SCACHEFLAG_LOCKING;
1415 /* now update the buffer pointer */
1416 if (flags & CM_SCACHESYNC_FETCHDATA) {
1419 /* ensure that the buffer isn't already in the I/O list */
1420 for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1421 tbufp = osi_GetQData(qdp);
1426 osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
1431 bufp->cmFlags &= ~(CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED);
1432 if (bufp->flags & CM_BUF_WAITING) {
1433 osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1434 osi_Wakeup((LONG_PTR) &bufp);
1441 /* now update the buffer pointer */
1442 if (flags & CM_SCACHESYNC_STOREDATA) {
1444 /* ensure that the buffer isn't already in the I/O list */
1445 for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
1446 tbufp = osi_GetQData(qdp);
1451 osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
1456 bufp->cmFlags &= ~CM_BUF_CMSTORING;
1457 if (bufp->flags & CM_BUF_WAITING) {
1458 osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
1459 osi_Wakeup((LONG_PTR) &bufp);
1466 if (flags & CM_SCACHESYNC_WRITE) {
1468 osi_assertx(bufp->cmFlags & CM_BUF_CMWRITING, "!CM_BUF_CMWRITING");
1470 bufp->cmFlags &= ~CM_BUF_CMWRITING;
1474 /* and wakeup anyone who is waiting */
1475 if (scp->flags & CM_SCACHEFLAG_WAITING) {
1476 osi_Log1(afsd_logp, "CM SyncOpDone Waking scp 0x%p", scp);
1477 osi_Wakeup((LONG_PTR) &scp->flags);
1481 /* merge in a response from an RPC. The scp must be locked, and the callback
1484 * Don't overwrite any status info that is dirty, since we could have a store
1485 * operation (such as store data) that merges some info in, and we don't want
1486 * to lose the local updates. Typically, there aren't many updates we do
1487 * locally, anyway, probably only mtime.
1489 * There is probably a bug in here where a chmod (which doesn't change
1490 * serverModTime) that occurs between two fetches, both of whose responses are
1491 * handled after the callback breaking is done, but only one of whose calls
1492 * started before that, can cause old info to be merged from the first call.
1494 void cm_MergeStatus(cm_scache_t *dscp,
1495 cm_scache_t *scp, AFSFetchStatus *statusp,
1496 AFSVolSync *volsyncp,
1497 cm_user_t *userp, afs_uint32 flags)
1499 afs_uint64 dataVersion;
1501 // yj: i want to create some fake status for the /afs directory and the
1502 // entries under that directory
1503 #ifdef AFS_FREELANCE_CLIENT
1504 if (cm_freelanceEnabled && scp == cm_data.rootSCachep) {
1505 osi_Log0(afsd_logp,"cm_MergeStatus Freelance cm_data.rootSCachep");
1506 statusp->InterfaceVersion = 0x1;
1507 statusp->FileType = CM_SCACHETYPE_DIRECTORY;
1508 statusp->LinkCount = scp->linkCount;
1509 statusp->Length = cm_fakeDirSize;
1510 statusp->Length_hi = 0;
1511 statusp->DataVersion = (afs_uint32)(cm_data.fakeDirVersion & 0xFFFFFFFF);
1512 statusp->Author = 0x1;
1513 statusp->Owner = 0x0;
1514 statusp->CallerAccess = 0x9;
1515 statusp->AnonymousAccess = 0x9;
1516 statusp->UnixModeBits = 0777;
1517 statusp->ParentVnode = 0x1;
1518 statusp->ParentUnique = 0x1;
1519 statusp->ResidencyMask = 0;
1520 statusp->ClientModTime = FakeFreelanceModTime;
1521 statusp->ServerModTime = FakeFreelanceModTime;
1523 statusp->SyncCounter = 0;
1524 statusp->dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
1525 statusp->errorCode = 0;
1527 #endif /* AFS_FREELANCE_CLIENT */
1529 if (statusp->errorCode != 0) {
1530 scp->flags |= CM_SCACHEFLAG_EACCESS;
1531 osi_Log2(afsd_logp, "Merge, Failure scp %x code 0x%x", scp, statusp->errorCode);
1533 scp->fileType = 0; /* unknown */
1535 scp->serverModTime = 0;
1536 scp->clientModTime = 0;
1537 scp->length.LowPart = 0;
1538 scp->length.HighPart = 0;
1539 scp->serverLength.LowPart = 0;
1540 scp->serverLength.HighPart = 0;
1544 scp->unixModeBits = 0;
1546 scp->dataVersion = 0;
1547 scp->bufDataVersionLow = 0;
1550 scp->parentVnode = dscp->fid.vnode;
1551 scp->parentUnique = dscp->fid.unique;
1553 scp->parentVnode = 0;
1554 scp->parentUnique = 0;
1558 scp->flags &= ~CM_SCACHEFLAG_EACCESS;
1561 dataVersion = statusp->dataVersionHigh;
1563 dataVersion |= statusp->DataVersion;
1565 if (!(flags & CM_MERGEFLAG_FORCE) && dataVersion < scp->dataVersion) {
1566 struct cm_cell *cellp;
1568 cellp = cm_FindCellByID(scp->fid.cell, 0);
1569 if (scp->cbServerp) {
1570 struct cm_volume *volp = NULL;
1572 cm_FindVolumeByID(cellp, scp->fid.volume, userp,
1573 (cm_req_t *) NULL, CM_GETVOL_FLAG_CREATE, &volp);
1574 osi_Log2(afsd_logp, "old data from server %x volume %s",
1575 scp->cbServerp->addr.sin_addr.s_addr,
1576 volp ? volp->namep : "(unknown)");
1580 osi_Log3(afsd_logp, "Bad merge, scp %x, scp dv %d, RPC dv %d",
1581 scp, scp->dataVersion, dataVersion);
1582 /* we have a number of data fetch/store operations running
1583 * concurrently, and we can tell which one executed last at the
1584 * server by its mtime.
1585 * Choose the one with the largest mtime, and ignore the rest.
1587 * These concurrent calls are incompatible with setting the
1588 * mtime, so we won't have a locally changed mtime here.
1590 * We could also have ACL info for a different user than usual,
1591 * in which case we have to do that part of the merge, anyway.
1592 * We won't have to worry about the info being old, since we
1593 * won't have concurrent calls
1594 * that change file status running from this machine.
1596 * Added 3/17/98: if we see data version regression on an RO
1597 * file, it's probably due to a server holding an out-of-date
1598 * replica, rather than to concurrent RPC's. Failures to
1599 * release replicas are now flagged by the volserver, but only
1600 * since AFS 3.4 5.22, so there are plenty of clients getting
1601 * out-of-date replicas out there.
1603 * If we discover an out-of-date replica, by this time it's too
1604 * late to go to another server and retry. Also, we can't
1605 * reject the merge, because then there is no way for
1606 * GetAccess to do its work, and the caller gets into an
1607 * infinite loop. So we just grin and bear it.
1609 if (!(scp->flags & CM_SCACHEFLAG_RO))
1613 scp->serverModTime = statusp->ServerModTime;
1615 if (!(scp->mask & CM_SCACHEMASK_CLIENTMODTIME)) {
1616 scp->clientModTime = statusp->ClientModTime;
1618 if (!(scp->mask & CM_SCACHEMASK_LENGTH)) {
1619 scp->length.LowPart = statusp->Length;
1620 scp->length.HighPart = statusp->Length_hi;
1623 scp->serverLength.LowPart = statusp->Length;
1624 scp->serverLength.HighPart = statusp->Length_hi;
1626 scp->linkCount = statusp->LinkCount;
1627 scp->owner = statusp->Owner;
1628 scp->group = statusp->Group;
1629 scp->unixModeBits = statusp->UnixModeBits & 07777;
1631 if (statusp->FileType == File)
1632 scp->fileType = CM_SCACHETYPE_FILE;
1633 else if (statusp->FileType == Directory)
1634 scp->fileType = CM_SCACHETYPE_DIRECTORY;
1635 else if (statusp->FileType == SymbolicLink) {
1636 if ((scp->unixModeBits & 0111) == 0)
1637 scp->fileType = CM_SCACHETYPE_MOUNTPOINT;
1639 scp->fileType = CM_SCACHETYPE_SYMLINK;
1642 osi_Log2(afsd_logp, "Merge, Invalid File Type (%d), scp %x", statusp->FileType, scp);
1643 scp->fileType = CM_SCACHETYPE_INVALID; /* invalid */
1645 /* and other stuff */
1646 scp->parentVnode = statusp->ParentVnode;
1647 scp->parentUnique = statusp->ParentUnique;
1649 /* and merge in the private acl cache info, if this is more than the public
1650 * info; merge in the public stuff in any case.
1652 scp->anyAccess = statusp->AnonymousAccess;
1654 if (userp != NULL) {
1655 cm_AddACLCache(scp, userp, statusp->CallerAccess);
1658 if (scp->dataVersion != 0 &&
1659 (!(flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && dataVersion != scp->dataVersion ||
1660 (flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && dataVersion - scp->dataVersion > 1)) {
1662 * We now know that all of the data buffers that we have associated
1663 * with this scp are invalid. Subsequent operations will go faster
1664 * if the buffers are removed from the hash tables.
1666 * We do not remove directory buffers if the dataVersion delta is 1 because
1667 * those version numbers will be updated as part of the directory operation.
1669 * We do not remove storedata buffers because they will still be valid.
1674 cm_buf_t *bp, *prevBp, *nextBp;
1676 lock_ObtainWrite(&buf_globalLock);
1677 i = BUF_FILEHASH(&scp->fid);
1678 for (bp = cm_data.buf_fileHashTablepp[i]; bp; bp=nextBp)
1680 nextBp = bp->fileHashp;
1682 * if the buffer belongs to this stat cache entry
1683 * and the buffer mutex can be obtained, check the
1684 * reference count and if it is zero, remove the buffer
1685 * from the hash tables. If there are references,
1686 * the buffer might be updated to the current version
1687 * so leave it in place.
1689 if (cm_FidCmp(&scp->fid, &bp->fid) == 0 &&
1690 lock_TryMutex(&bp->mx)) {
1691 if (bp->refCount == 0 &&
1692 !(bp->flags & CM_BUF_READING | CM_BUF_WRITING | CM_BUF_DIRTY)) {
1693 prevBp = bp->fileHashBackp;
1694 bp->fileHashBackp = bp->fileHashp = NULL;
1696 prevBp->fileHashp = nextBp;
1698 cm_data.buf_fileHashTablepp[i] = nextBp;
1700 nextBp->fileHashBackp = prevBp;
1702 j = BUF_HASH(&bp->fid, &bp->offset);
1703 lbpp = &(cm_data.buf_scacheHashTablepp[j]);
1704 for(tbp = *lbpp; tbp; lbpp = &tbp->hashp, tbp = *lbpp) {
1709 *lbpp = bp->hashp; /* hash out */
1712 bp->flags &= ~CM_BUF_INHASH;
1714 lock_ReleaseMutex(&bp->mx);
1717 lock_ReleaseWrite(&buf_globalLock);
1720 /* We maintain a range of buffer dataVersion values which are considered
1721 * valid. This avoids the need to update the dataVersion on each buffer
1722 * object during an uncontested storeData operation. As a result this
1723 * merge status no longer has performance characteristics derived from
1724 * the size of the file.
1726 if (((flags & CM_MERGEFLAG_STOREDATA) && dataVersion - scp->dataVersion > 1) ||
1727 (!(flags & CM_MERGEFLAG_STOREDATA) && scp->dataVersion != dataVersion) ||
1728 scp->bufDataVersionLow == 0)
1729 scp->bufDataVersionLow = dataVersion;
1731 scp->dataVersion = dataVersion;
1734 * If someone is waiting for status information, we can wake them up
1735 * now even though the entity that issued the FetchStatus may not
1736 * have completed yet.
1738 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS);
1741 /* note that our stat cache info is incorrect, so force us eventually
1742 * to stat the file again. There may be dirty data associated with
1743 * this vnode, and we want to preserve that information.
1745 * This function works by simply simulating a loss of the callback.
1747 * This function must be called with the scache locked.
1749 void cm_DiscardSCache(cm_scache_t *scp)
1751 lock_AssertWrite(&scp->rw);
1752 if (scp->cbServerp) {
1753 cm_PutServer(scp->cbServerp);
1754 scp->cbServerp = NULL;
1757 scp->flags &= ~(CM_SCACHEFLAG_CALLBACK | CM_SCACHEFLAG_LOCAL);
1758 cm_dnlcPurgedp(scp);
1759 cm_dnlcPurgevp(scp);
1760 cm_FreeAllACLEnts(scp);
1762 if (scp->fileType == CM_SCACHETYPE_DFSLINK)
1763 cm_VolStatus_Invalidate_DFS_Mapping(scp);
1765 /* Force mount points and symlinks to be re-evaluated */
1766 scp->mountPointStringp[0] = '\0';
1769 void cm_AFSFidFromFid(AFSFid *afsFidp, cm_fid_t *fidp)
1771 afsFidp->Volume = fidp->volume;
1772 afsFidp->Vnode = fidp->vnode;
1773 afsFidp->Unique = fidp->unique;
1776 #ifdef DEBUG_REFCOUNT
1777 void cm_HoldSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
1779 void cm_HoldSCacheNoLock(cm_scache_t *scp)
1784 osi_assertx(scp != NULL, "null cm_scache_t");
1785 lock_AssertAny(&cm_scacheLock);
1786 refCount = InterlockedIncrement(&scp->refCount);
1787 #ifdef DEBUG_REFCOUNT
1788 osi_Log2(afsd_logp,"cm_HoldSCacheNoLock scp 0x%p ref %d",scp, refCount);
1789 afsi_log("%s:%d cm_HoldSCacheNoLock scp 0x%p, ref %d", file, line, scp, refCount);
1793 #ifdef DEBUG_REFCOUNT
1794 void cm_HoldSCacheDbg(cm_scache_t *scp, char * file, long line)
1796 void cm_HoldSCache(cm_scache_t *scp)
1801 osi_assertx(scp != NULL, "null cm_scache_t");
1802 lock_ObtainRead(&cm_scacheLock);
1803 refCount = InterlockedIncrement(&scp->refCount);
1804 #ifdef DEBUG_REFCOUNT
1805 osi_Log2(afsd_logp,"cm_HoldSCache scp 0x%p ref %d",scp, refCount);
1806 afsi_log("%s:%d cm_HoldSCache scp 0x%p ref %d", file, line, scp, refCount);
1808 lock_ReleaseRead(&cm_scacheLock);
1811 #ifdef DEBUG_REFCOUNT
1812 void cm_ReleaseSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
1814 void cm_ReleaseSCacheNoLock(cm_scache_t *scp)
1819 osi_assertx(scp != NULL, "null cm_scache_t");
1820 lock_AssertAny(&cm_scacheLock);
1822 refCount = InterlockedDecrement(&scp->refCount);
1823 #ifdef DEBUG_REFCOUNT
1825 osi_Log1(afsd_logp,"cm_ReleaseSCacheNoLock about to panic scp 0x%x",scp);
1827 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
1828 #ifdef DEBUG_REFCOUNT
1829 osi_Log2(afsd_logp,"cm_ReleaseSCacheNoLock scp 0x%p ref %d",scp, refCount);
1830 afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, refCount);
1833 if (refCount == 0 && (scp->flags & CM_SCACHEFLAG_DELETED)) {
1837 lockstate = lock_GetRWLockState(&cm_scacheLock);
1838 if (lockstate != OSI_RWLOCK_WRITEHELD)
1839 lock_ReleaseRead(&cm_scacheLock);
1841 lock_ReleaseWrite(&cm_scacheLock);
1843 lock_ObtainWrite(&scp->rw);
1844 if (scp->flags & CM_SCACHEFLAG_DELETED)
1847 if (refCount == 0 && deleted) {
1848 lock_ObtainWrite(&cm_scacheLock);
1849 cm_RecycleSCache(scp, 0);
1850 if (lockstate != OSI_RWLOCK_WRITEHELD)
1851 lock_ConvertWToR(&cm_scacheLock);
1853 if (lockstate != OSI_RWLOCK_WRITEHELD)
1854 lock_ObtainRead(&cm_scacheLock);
1856 lock_ObtainWrite(&cm_scacheLock);
1858 lock_ReleaseWrite(&scp->rw);
1862 #ifdef DEBUG_REFCOUNT
1863 void cm_ReleaseSCacheDbg(cm_scache_t *scp, char * file, long line)
1865 void cm_ReleaseSCache(cm_scache_t *scp)
1870 osi_assertx(scp != NULL, "null cm_scache_t");
1871 lock_ObtainRead(&cm_scacheLock);
1872 refCount = InterlockedDecrement(&scp->refCount);
1873 #ifdef DEBUG_REFCOUNT
1875 osi_Log1(afsd_logp,"cm_ReleaseSCache about to panic scp 0x%x",scp);
1877 osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
1878 #ifdef DEBUG_REFCOUNT
1879 osi_Log2(afsd_logp,"cm_ReleaseSCache scp 0x%p ref %d",scp, refCount);
1880 afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, refCount);
1882 lock_ReleaseRead(&cm_scacheLock);
1884 if (scp->flags & CM_SCACHEFLAG_DELETED) {
1886 lock_ObtainWrite(&scp->rw);
1887 if (scp->flags & CM_SCACHEFLAG_DELETED)
1890 lock_ObtainWrite(&cm_scacheLock);
1891 cm_RecycleSCache(scp, 0);
1892 lock_ReleaseWrite(&cm_scacheLock);
1894 lock_ReleaseWrite(&scp->rw);
1898 /* just look for the scp entry to get filetype */
1899 /* doesn't need to be perfectly accurate, so locking doesn't matter too much */
1900 int cm_FindFileType(cm_fid_t *fidp)
1905 hash = CM_SCACHE_HASH(fidp);
1907 osi_assertx(fidp->cell != 0, "unassigned cell value");
1909 lock_ObtainWrite(&cm_scacheLock);
1910 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
1911 if (cm_FidCmp(fidp, &scp->fid) == 0) {
1912 lock_ReleaseWrite(&cm_scacheLock);
1913 return scp->fileType;
1916 lock_ReleaseWrite(&cm_scacheLock);
1920 /* dump all scp's that have reference count > 0 to a file.
1921 * cookie is used to identify this batch for easy parsing,
1922 * and it a string provided by a caller
1924 int cm_DumpSCache(FILE *outputFile, char *cookie, int lock)
1933 lock_ObtainRead(&cm_scacheLock);
1935 sprintf(output, "%s - dumping all scache - cm_data.currentSCaches=%d, cm_data.maxSCaches=%d\r\n", cookie, cm_data.currentSCaches, cm_data.maxSCaches);
1936 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1938 for (scp = cm_data.allSCachesp; scp; scp = scp->allNextp)
1940 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",
1941 cookie, scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
1942 scp->fileType, scp->dataVersion, scp->length.QuadPart, scp->mountPointStringp,
1943 scp->serverLock, scp->sharedLocks, scp->exclusiveLocks, scp->clientLocks,
1944 scp->flags, (unsigned long)scp->cbExpires, scp->refCount);
1945 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1947 if (scp->fileLocksH) {
1948 sprintf(output, " %s - begin dumping scp locks\r\n", cookie);
1949 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1951 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
1952 cm_file_lock_t * lockp = (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
1953 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",
1954 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
1955 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
1956 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1959 sprintf(output, " %s - done dumping scp locks\r\n", cookie);
1960 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1964 sprintf(output, "%s - Done dumping all scache.\r\n", cookie);
1965 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1966 sprintf(output, "%s - dumping cm_data.scacheHashTable - cm_data.scacheHashTableSize=%d\r\n", cookie, cm_data.scacheHashTableSize);
1967 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1969 for (i = 0; i < cm_data.scacheHashTableSize; i++)
1971 for(scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp)
1973 sprintf(output, "%s scp=0x%p, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d)\r\n",
1974 cookie, scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1975 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1979 sprintf(output, "%s - Done dumping cm_data.scacheHashTable\r\n", cookie);
1980 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1982 sprintf(output, "%s - begin dumping all file locks\r\n", cookie);
1983 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1985 for (q = cm_allFileLocks; q; q = osi_QNext(q)) {
1986 cm_file_lock_t * lockp = (cm_file_lock_t *)q;
1987 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",
1988 cookie, lockp, lockp->scp, lockp->userp, lockp->range.offset, lockp->range.length,
1989 lockp->lockType, lockp->key, lockp->flags, (afs_uint64)lockp->lastUpdate);
1990 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1993 sprintf(output, "%s - done dumping all file locks\r\n", cookie);
1994 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1997 lock_ReleaseRead(&cm_scacheLock);