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
11 * --------------------- Required definitions ---------------------
13 #include <afsconfig.h>
14 #include "afs/param.h"
19 #include "afs/sysincludes.h" /*Standard vendor system headers */
20 #include "afsincludes.h" /*AFS-based standard headers */
21 #include "afs/afs_stats.h" /* statistics */
22 #include "afs/afs_cbqueue.h"
23 #include "afs/afs_osidnlc.h"
25 afs_uint32 afs_stampValue = 0;
31 * Send a truncation request to a FileServer.
37 * We're write-locked upon entry.
41 afs_StoreMini(register struct vcache *avc, struct vrequest *areq)
43 register struct conn *tc;
44 struct AFSStoreStatus InStatus;
45 struct AFSFetchStatus OutStatus;
46 struct AFSVolSync tsync;
47 register afs_int32 code;
48 register struct rx_call *tcall;
49 afs_size_t tlen, xlen = 0;
51 AFS_STATCNT(afs_StoreMini);
52 afs_Trace2(afs_iclSetp, CM_TRACE_STOREMINI, ICL_TYPE_POINTER, avc,
53 ICL_TYPE_INT32, avc->m.Length);
55 if (avc->truncPos < tlen)
57 avc->truncPos = AFS_NOTRUNC;
58 avc->states &= ~CExtendedFile;
61 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
65 tcall = rx_NewCall(tc->id);
67 /* Set the client mod time since we always want the file
68 * to have the client's mod time and not the server's one
69 * (to avoid problems with make, etc.) It almost always
70 * works fine with standard afs because them server/client
71 * times are in sync and more importantly this storemini
72 * it's a special call that would typically be followed by
73 * the proper store-data or store-status calls.
75 InStatus.Mask = AFS_SETMODTIME;
76 InStatus.ClientModTime = avc->m.Date;
77 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STOREDATA);
78 afs_Trace4(afs_iclSetp, CM_TRACE_STOREDATA64, ICL_TYPE_FID,
79 &avc->fid.Fid, ICL_TYPE_OFFSET,
80 ICL_HANDLE_OFFSET(avc->m.Length), ICL_TYPE_OFFSET,
81 ICL_HANDLE_OFFSET(xlen), ICL_TYPE_OFFSET,
82 ICL_HANDLE_OFFSET(tlen));
84 #ifdef AFS_64BIT_CLIENT
85 if (!afs_serverHasNo64Bit(tc)) {
87 StartRXAFS_StoreData64(tcall,
88 (struct AFSFid *)&avc->fid.Fid,
89 &InStatus, avc->m.Length,
90 (afs_size_t) 0, tlen);
95 if ((avc->m.Length > 0x7fffffff) ||
96 (tlen > 0x7fffffff) ||
97 ((0x7fffffff - tlen) < avc->m.Length))
100 StartRXAFS_StoreData(tcall,
101 (struct AFSFid *)&avc->fid.Fid,
102 &InStatus, l1, 0, l2);
104 #else /* AFS_64BIT_CLIENT */
106 StartRXAFS_StoreData(tcall, (struct AFSFid *)&avc->fid.Fid,
107 &InStatus, avc->m.Length, 0, tlen);
108 #endif /* AFS_64BIT_CLIENT */
110 code = EndRXAFS_StoreData(tcall, &OutStatus, &tsync);
112 code = rx_EndCall(tcall, code);
115 #ifdef AFS_64BIT_CLIENT
116 if (code == RXGEN_OPCODE && !afs_serverHasNo64Bit(tc)) {
117 afs_serverSetNo64Bit(tc);
120 #endif /* AFS_64BIT_CLIENT */
124 (tc, code, &avc->fid, areq, AFS_STATS_FS_RPCIDX_STOREDATA,
128 afs_ProcessFS(avc, &OutStatus, areq);
131 afs_InvalidateAllSegments(avc);
137 unsigned int storeallmissing = 0;
138 #define lmin(a,b) (((a) < (b)) ? (a) : (b))
140 * afs_StoreAllSegments
143 * Stores all modified segments back to server
146 * avc : Pointer to vcache entry.
147 * areq : Pointer to request structure.
150 * Called with avc write-locked.
152 #if defined (AFS_HPUX_ENV)
153 int NCHUNKSATONCE = 3;
155 int NCHUNKSATONCE = 64;
161 afs_StoreAllSegments(register struct vcache *avc, struct vrequest *areq,
164 register struct dcache *tdc;
165 register afs_int32 code = 0;
166 register afs_int32 index;
167 register afs_int32 origCBs, foreign = 0;
169 afs_hyper_t newDV, oldDV; /* DV when we start, and finish, respectively */
170 struct dcache **dcList, **dclist;
171 unsigned int i, j, minj, moredata, high, off;
173 afs_size_t maxStoredLength; /* highest offset we've written to server. */
176 struct afs_stats_xferData *xferP; /* Ptr to this op's xfer struct */
177 osi_timeval_t xferStartTime, /*FS xfer start time */
178 xferStopTime; /*FS xfer stop time */
179 afs_size_t bytesToXfer; /* # bytes to xfer */
180 afs_size_t bytesXferred; /* # bytes actually xferred */
181 #endif /* AFS_NOSTATS */
184 AFS_STATCNT(afs_StoreAllSegments);
186 hset(oldDV, avc->m.DataVersion);
187 hset(newDV, avc->m.DataVersion);
188 hash = DVHash(&avc->fid);
189 foreign = (avc->states & CForeign);
190 dcList = (struct dcache **)osi_AllocLargeSpace(AFS_LRALLOCSIZ);
191 afs_Trace2(afs_iclSetp, CM_TRACE_STOREALL, ICL_TYPE_POINTER, avc,
192 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
193 #if !defined(AFS_AIX32_ENV) && !defined(AFS_SGI65_ENV)
194 /* In the aix vm implementation we need to do the vm_writep even
195 * on the memcache case since that's we adjust the file's size
196 * and finish flushing partial vm pages.
198 if (cacheDiskType != AFS_FCACHE_TYPE_MEM)
199 #endif /* !AFS_AIX32_ENV && !AFS_SGI65_ENV */
201 /* If we're not diskless, reading a file may stress the VM
202 * system enough to cause a pageout, and this vnode would be
203 * locked when the pageout occurs. We can prevent this problem
204 * by making sure all dirty pages are already flushed. We don't
205 * do this when diskless because reading a diskless (i.e.
206 * memory-resident) chunk doesn't require using new VM, and we
207 * also don't want to dump more dirty data into a diskless cache,
208 * since they're smaller, and we might exceed its available
211 #if defined(AFS_SUN5_ENV)
212 if (sync & AFS_VMSYNC_INVAL) /* invalidate VM pages */
213 osi_VM_TryToSmush(avc, CRED(), 1);
216 osi_VM_StoreAllSegments(avc);
218 if (AFS_IS_DISCONNECTED && !AFS_IN_SYNC) {
219 if (!AFS_IS_LOGGING) {
220 /* This will probably make someone sad ... */
221 /*printf("Net down in afs_StoreSegments\n");*/
225 ConvertWToSLock(&avc->lock);
228 * Subsequent code expects a sorted list, and it expects all the
229 * chunks in the list to be contiguous, so we need a sort and a
230 * while loop in here, too - but this will work for a first pass...
231 * 92.10.05 - OK, there's a sort in here now. It's kind of a modified
232 * bin sort, I guess. Chunk numbers start with 0
234 * - Have to get a write lock on xdcache because GetDSlot might need it (if
235 * the chunk doesn't have a dcache struct).
236 * This seems like overkill in most cases.
237 * - I'm not sure that it's safe to do "index = .hvNextp", then unlock
238 * xdcache, then relock xdcache and try to use index. It is done
239 * a lot elsewhere in the CM, but I'm not buying that argument.
240 * - should be able to check IFDataMod without doing the GetDSlot (just
241 * hold afs_xdcache). That way, it's easy to do this without the
242 * writelock on afs_xdcache, and we save unneccessary disk
243 * operations. I don't think that works, 'cuz the next pointers
246 origCBs = afs_allCBs;
249 tlen = avc->m.Length;
253 memset((char *)dcList, 0, NCHUNKSATONCE * sizeof(struct dcache *));
257 /* lock and start over from beginning of hash chain
258 * in order to avoid a race condition. */
259 MObtainWriteLock(&afs_xdcache, 284);
260 index = afs_dvhashTbl[hash];
262 for (j = 0; index != NULLIDX;) {
263 if ((afs_indexFlags[index] & IFDataMod)
264 && (afs_indexUnique[index] == avc->fid.Fid.Unique)) {
265 tdc = afs_GetDSlot(index, 0); /* refcount+1. */
266 ReleaseReadLock(&tdc->tlock);
267 if (!FidCmp(&tdc->f.fid, &avc->fid) && tdc->f.chunk >= minj) {
268 off = tdc->f.chunk - minj;
269 if (off < NCHUNKSATONCE) {
271 osi_Panic("dclist slot already in use!");
276 /* DCLOCKXXX: chunkBytes is protected by tdc->lock which we
277 * can't grab here, due to lock ordering with afs_xdcache.
278 * So, disable this shortcut for now. -- kolya 2001-10-13
280 /* shortcut: big win for little files */
281 /* tlen -= tdc->f.chunkBytes;
288 if (j == NCHUNKSATONCE)
295 index = afs_dvnextTbl[index];
297 MReleaseWriteLock(&afs_xdcache);
299 /* this guy writes chunks, puts back dcache structs, and bumps newDV */
300 /* "moredata" just says "there are more dirty chunks yet to come".
304 static afs_uint32 lp1 = 10000, lp2 = 10000;
306 struct AFSStoreStatus InStatus;
307 struct AFSFetchStatus OutStatus;
309 afs_size_t base, bytes;
312 unsigned int first = 0;
315 struct osi_file *tfile;
316 struct rx_call *tcall;
318 for (bytes = 0, j = 0; !code && j <= high; j++) {
320 ObtainSharedLock(&(dcList[j]->lock), 629);
323 bytes += dcList[j]->f.chunkBytes;
324 if ((dcList[j]->f.chunkBytes < afs_OtherCSize)
325 && (dcList[j]->f.chunk - minj < high)
327 int sbytes = afs_OtherCSize - dcList[j]->f.chunkBytes;
331 if (bytes && (j == high || !dcList[j + 1])) {
332 /* base = AFS_CHUNKTOBASE(dcList[first]->f.chunk); */
333 base = AFS_CHUNKTOBASE(first + minj);
336 * take a list of dcache structs and send them all off to the server
337 * the list must be in order, and the chunks contiguous.
338 * Note - there is no locking done by this code currently. For
339 * safety's sake, xdcache could be locked over the entire call.
340 * However, that pretty well ties up all the threads. Meantime, all
341 * the chunks _MUST_ have their refcounts bumped.
342 * The writes done before a store back will clear setuid-ness
344 * We can permit CacheStoreProc to wake up the user process IFF we
345 * are doing the last RPC for this close, ie, storing back the last
346 * set of contiguous chunks of a file.
349 dclist = &dcList[first];
350 nchunks = 1 + j - first;
351 nomore = !(moredata || (j != high));
352 InStatus.ClientModTime = avc->m.Date;
353 InStatus.Mask = AFS_SETMODTIME;
354 if (sync & AFS_SYNC) {
355 InStatus.Mask |= AFS_FSYNC;
357 tlen = lmin(avc->m.Length, avc->truncPos);
358 afs_Trace4(afs_iclSetp, CM_TRACE_STOREDATA64,
359 ICL_TYPE_FID, &avc->fid.Fid, ICL_TYPE_OFFSET,
360 ICL_HANDLE_OFFSET(base), ICL_TYPE_OFFSET,
361 ICL_HANDLE_OFFSET(bytes), ICL_TYPE_OFFSET,
362 ICL_HANDLE_OFFSET(tlen));
366 tc = afs_Conn(&avc->fid, areq, 0);
370 tcall = rx_NewCall(tc->id);
371 #ifdef AFS_64BIT_CLIENT
372 if (!afs_serverHasNo64Bit(tc)) {
374 StartRXAFS_StoreData64(tcall,
380 if (tlen > 0xFFFFFFFF) {
383 afs_int32 t1, t2, t3;
388 StartRXAFS_StoreData(tcall,
395 #else /* AFS_64BIT_CLIENT */
397 StartRXAFS_StoreData(tcall,
398 (struct AFSFid *)&avc->
399 fid.Fid, &InStatus, base,
401 #endif /* AFS_64BIT_CLIENT */
408 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STOREDATA);
409 avc->truncPos = AFS_NOTRUNC;
411 for (i = 0; i < nchunks && !code; i++) {
414 afs_warn("afs: missing dcache!\n");
416 continue; /* panic? */
418 afs_Trace4(afs_iclSetp, CM_TRACE_STOREALL2,
419 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32,
420 tdc->f.chunk, ICL_TYPE_INT32,
421 tdc->index, ICL_TYPE_INT32,
425 if (avc->asynchrony == -1) {
426 if (afs_defaultAsynchrony >
428 shouldwake = &nomore;
430 } else if ((afs_uint32) avc->asynchrony >=
432 shouldwake = &nomore;
435 #if defined(LINUX_USE_FH)
436 tfile = afs_CFileOpen(&tdc->f.fh, tdc->f.fh_type);
438 tfile = afs_CFileOpen(tdc->f.inode);
442 &(afs_stats_cmfullperf.rpc.
444 [AFS_STATS_FS_XFERIDX_STOREDATA]);
445 osi_GetuTime(&xferStartTime);
448 afs_CacheStoreProc(tcall, tfile,
449 tdc->f.chunkBytes, avc,
450 shouldwake, &bytesToXfer,
453 osi_GetuTime(&xferStopTime);
456 (xferP->numSuccesses)++;
457 afs_stats_XferSumBytes
458 [AFS_STATS_FS_XFERIDX_STOREDATA] +=
461 (afs_stats_XferSumBytes
462 [AFS_STATS_FS_XFERIDX_STOREDATA] >> 10);
463 afs_stats_XferSumBytes
464 [AFS_STATS_FS_XFERIDX_STOREDATA] &= 0x3FF;
465 if (bytesXferred < xferP->minBytes)
466 xferP->minBytes = bytesXferred;
467 if (bytesXferred > xferP->maxBytes)
468 xferP->maxBytes = bytesXferred;
471 * Tally the size of the object. Note: we tally the actual size,
472 * NOT the number of bytes that made it out over the wire.
474 if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET0)
476 else if (bytesToXfer <=
477 AFS_STATS_MAXBYTES_BUCKET1)
479 else if (bytesToXfer <=
480 AFS_STATS_MAXBYTES_BUCKET2)
482 else if (bytesToXfer <=
483 AFS_STATS_MAXBYTES_BUCKET3)
485 else if (bytesToXfer <=
486 AFS_STATS_MAXBYTES_BUCKET4)
488 else if (bytesToXfer <=
489 AFS_STATS_MAXBYTES_BUCKET5)
491 else if (bytesToXfer <=
492 AFS_STATS_MAXBYTES_BUCKET6)
494 else if (bytesToXfer <=
495 AFS_STATS_MAXBYTES_BUCKET7)
500 afs_stats_GetDiff(elapsedTime, xferStartTime,
502 afs_stats_AddTo((xferP->sumTime),
504 afs_stats_SquareAddTo((xferP->sqrTime),
506 if (afs_stats_TimeLessThan
507 (elapsedTime, (xferP->minTime))) {
508 afs_stats_TimeAssign((xferP->minTime),
511 if (afs_stats_TimeGreaterThan
512 (elapsedTime, (xferP->maxTime))) {
513 afs_stats_TimeAssign((xferP->maxTime),
519 afs_CacheStoreProc(tcall, tfile,
520 tdc->f.chunkBytes, avc,
521 shouldwake, &lp1, &lp2);
522 #endif /* AFS_NOSTATS */
523 afs_CFileClose(tfile);
524 if ((tdc->f.chunkBytes < afs_OtherCSize)
525 && (i < (nchunks - 1)) && code == 0) {
526 int bsent, tlen, sbytes =
527 afs_OtherCSize - tdc->f.chunkBytes;
529 osi_AllocLargeSpace(AFS_LRALLOCSIZ);
534 AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ :
536 memset(tbuffer, 0, tlen);
538 bsent = rx_Write(tcall, tbuffer, tlen);
542 code = -33; /* XXX */
547 osi_FreeLargeSpace(tbuffer);
549 stored += tdc->f.chunkBytes;
551 /* ideally, I'd like to unlock the dcache and turn
552 * off the writing bit here, but that would
553 * require being able to retry StoreAllSegments in
554 * the event of a failure. It only really matters
555 * if user can't read from a 'locked' dcache or
556 * one which has the writing bit turned on. */
559 struct AFSVolSync tsync;
562 EndRXAFS_StoreData(tcall, &OutStatus, &tsync);
567 doProcessFS = 1; /* Flag to run afs_ProcessFS() later on */
572 code2 = rx_EndCall(tcall, code);
577 #ifdef AFS_64BIT_CLIENT
578 if (code == RXGEN_OPCODE && !afs_serverHasNo64Bit(tc)) {
579 afs_serverSetNo64Bit(tc);
582 #endif /* AFS_64BIT_CLIENT */
584 (tc, code, &avc->fid, areq,
585 AFS_STATS_FS_RPCIDX_STOREDATA, SHARED_LOCK,
588 /* put back all remaining locked dcache entries */
589 for (i = 0; i < nchunks; i++) {
592 if (afs_indexFlags[tdc->index] & IFDataMod) {
594 * LOCKXXX -- should hold afs_xdcache(W) when
595 * modifying afs_indexFlags.
597 afs_indexFlags[tdc->index] &= ~IFDataMod;
598 afs_stats_cmperf.cacheCurrDirtyChunks--;
599 afs_indexFlags[tdc->index] &= ~IFDirtyPages;
600 if (sync & AFS_VMSYNC_INVAL) {
601 /* since we have invalidated all the pages of this
602 ** vnode by calling osi_VM_TryToSmush, we can
603 ** safely mark this dcache entry as not having
604 ** any pages. This vnode now becomes eligible for
605 ** reclamation by getDownD.
607 afs_indexFlags[tdc->index] &= ~IFAnyPages;
611 UpgradeSToWLock(&tdc->lock, 628);
612 tdc->f.states &= ~DWriting; /* correct? */
613 tdc->dflags |= DFEntryMod;
614 ReleaseWriteLock(&tdc->lock);
616 /* Mark the entry as released */
621 /* Now copy out return params */
622 UpgradeSToWLock(&avc->lock, 28); /* keep out others for a while */
623 afs_ProcessFS(avc, &OutStatus, areq);
624 /* Keep last (max) size of file on server to see if
625 * we need to call afs_StoreMini to extend the file.
628 maxStoredLength = OutStatus.Length;
629 ConvertWToSLock(&avc->lock);
634 for (j++; j <= high; j++) {
636 ReleaseSharedLock(&(dcList[j]->lock));
637 afs_PutDCache(dcList[j]);
638 /* Releasing entry */
644 afs_Trace2(afs_iclSetp, CM_TRACE_STOREALLDCDONE,
645 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code);
650 /* Release any zero-length dcache entries in our interval
651 * that we locked but didn't store back above.
653 for (j = 0; j <= high; j++) {
656 osi_Assert(tdc->f.chunkBytes == 0);
657 ReleaseSharedLock(&tdc->lock);
663 minj += NCHUNKSATONCE;
664 } while (!code && moredata);
666 UpgradeSToWLock(&avc->lock, 29);
668 /* send a trivial truncation store if did nothing else */
671 * Call StoreMini if we haven't written enough data to extend the
672 * file at the fileserver to the client's notion of the file length.
674 if ((avc->truncPos != AFS_NOTRUNC) || ((avc->states & CExtendedFile)
675 && (maxStoredLength <
677 code = afs_StoreMini(avc, areq);
679 hadd32(newDV, 1); /* just bumped here, too */
681 avc->states &= ~CExtendedFile;
685 * Finally, turn off DWriting, turn on DFEntryMod,
686 * update f.versionNo.
687 * A lot of this could be integrated into the loop above
697 memset((char *)dcList, 0,
698 NCHUNKSATONCE * sizeof(struct dcache *));
700 /* overkill, but it gets the lock in case GetDSlot needs it */
701 MObtainWriteLock(&afs_xdcache, 285);
703 for (j = 0, safety = 0, index = afs_dvhashTbl[hash];
704 index != NULLIDX && safety < afs_cacheFiles + 2;) {
706 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
707 tdc = afs_GetDSlot(index, 0);
708 ReleaseReadLock(&tdc->tlock);
710 if (!FidCmp(&tdc->f.fid, &avc->fid)
711 && tdc->f.chunk >= minj) {
712 off = tdc->f.chunk - minj;
713 if (off < NCHUNKSATONCE) {
714 /* this is the file, and the correct chunk range */
715 if (j >= NCHUNKSATONCE)
717 ("Too many dcache entries in range\n");
722 if (j == NCHUNKSATONCE)
730 index = afs_dvnextTbl[index];
732 MReleaseWriteLock(&afs_xdcache);
734 for (i = 0; i < j; i++) {
735 /* Iterate over the dcache entries we collected above */
737 ObtainSharedLock(&tdc->lock, 677);
739 /* was code here to clear IFDataMod, but it should only be done
740 * in storedcache and storealldcache.
742 /* Only increase DV if we had up-to-date data to start with.
743 * Otherwise, we could be falsely upgrading an old chunk
744 * (that we never read) into one labelled with the current
745 * DV #. Also note that we check that no intervening stores
746 * occurred, otherwise we might mislabel cache information
747 * for a chunk that we didn't store this time
749 /* Don't update the version number if it's not yet set. */
750 if (!hsame(tdc->f.versionNo, h_unset)
751 && hcmp(tdc->f.versionNo, oldDV) >= 0) {
753 if ((!(afs_dvhack || foreign)
754 && hsame(avc->m.DataVersion, newDV))
755 || ((afs_dvhack || foreign)
756 && (origCBs == afs_allCBs))) {
757 /* no error, this is the DV */
759 UpgradeSToWLock(&tdc->lock, 678);
760 hset(tdc->f.versionNo, avc->m.DataVersion);
761 tdc->dflags |= DFEntryMod;
762 ConvertWToSLock(&tdc->lock);
766 ReleaseSharedLock(&tdc->lock);
770 minj += NCHUNKSATONCE;
777 * Invalidate chunks after an error for ccores files since
778 * afs_inactive won't be called for these and they won't be
779 * invalidated. Also discard data if it's a permanent error from the
782 if (areq->permWriteError || (avc->states & (CCore1 | CCore))) {
783 afs_InvalidateAllSegments(avc);
786 afs_Trace3(afs_iclSetp, CM_TRACE_STOREALLDONE, ICL_TYPE_POINTER, avc,
787 ICL_TYPE_INT32, avc->m.Length, ICL_TYPE_INT32, code);
788 /* would like a Trace5, but it doesn't exist... */
789 afs_Trace3(afs_iclSetp, CM_TRACE_AVCLOCKER, ICL_TYPE_POINTER, avc,
790 ICL_TYPE_INT32, avc->lock.wait_states, ICL_TYPE_INT32,
791 avc->lock.excl_locked);
792 afs_Trace4(afs_iclSetp, CM_TRACE_AVCLOCKEE, ICL_TYPE_POINTER, avc,
793 ICL_TYPE_INT32, avc->lock.wait_states, ICL_TYPE_INT32,
794 avc->lock.readers_reading, ICL_TYPE_INT32,
795 avc->lock.num_waiting);
798 * Finally, if updated DataVersion matches newDV, we did all of the
799 * stores. If mapDV indicates that the page cache was flushed up
800 * to when we started the store, then we can relabel them as flushed
801 * as recently as newDV.
802 * Turn off CDirty bit because the stored data is now in sync with server.
804 if (code == 0 && hcmp(avc->mapDV, oldDV) >= 0) {
805 if ((!(afs_dvhack || foreign) && hsame(avc->m.DataVersion, newDV))
806 || ((afs_dvhack || foreign) && (origCBs == afs_allCBs))) {
807 hset(avc->mapDV, newDV);
808 avc->states &= ~CDirty;
811 osi_FreeLargeSpace(dcList);
813 /* If not the final write a temporary error is ok. */
814 if (code && !areq->permWriteError && !(sync & AFS_LASTSTORE))
819 } /*afs_StoreAllSegments (new 03/02/94) */
823 * afs_InvalidateAllSegments
826 * Invalidates all chunks for a given file
829 * avc : Pointer to vcache entry.
832 * For example, called after an error has been detected. Called
833 * with avc write-locked, and afs_xdcache unheld.
837 afs_InvalidateAllSegments(struct vcache *avc)
842 struct dcache **dcList;
843 int i, dcListMax, dcListCount;
845 AFS_STATCNT(afs_InvalidateAllSegments);
846 afs_Trace2(afs_iclSetp, CM_TRACE_INVALL, ICL_TYPE_POINTER, avc,
847 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
848 hash = DVHash(&avc->fid);
849 avc->truncPos = AFS_NOTRUNC; /* don't truncate later */
850 avc->states &= ~CExtendedFile; /* not any more */
851 ObtainWriteLock(&afs_xcbhash, 459);
852 afs_DequeueCallback(avc);
853 avc->states &= ~(CStatd | CDirty); /* mark status information as bad, too */
854 ReleaseWriteLock(&afs_xcbhash);
855 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
856 osi_dnlc_purgedp(avc);
857 /* Blow away pages; for now, only for Solaris */
858 #if (defined(AFS_SUN5_ENV))
859 if (WriteLocked(&avc->lock))
860 osi_ReleaseVM(avc, (struct AFS_UCRED *)0);
863 * Block out others from screwing with this table; is a read lock
866 MObtainWriteLock(&afs_xdcache, 286);
869 for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
870 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
871 tdc = afs_GetDSlot(index, 0);
872 ReleaseReadLock(&tdc->tlock);
873 if (!FidCmp(&tdc->f.fid, &avc->fid))
877 index = afs_dvnextTbl[index];
880 dcList = osi_Alloc(dcListMax * sizeof(struct dcache *));
883 for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
884 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
885 tdc = afs_GetDSlot(index, 0);
886 ReleaseReadLock(&tdc->tlock);
887 if (!FidCmp(&tdc->f.fid, &avc->fid)) {
888 /* same file? we'll zap it */
889 if (afs_indexFlags[index] & IFDataMod) {
890 afs_stats_cmperf.cacheCurrDirtyChunks--;
891 /* don't write it back */
892 afs_indexFlags[index] &= ~IFDataMod;
894 afs_indexFlags[index] &= ~IFAnyPages;
895 if (dcListCount < dcListMax)
896 dcList[dcListCount++] = tdc;
903 index = afs_dvnextTbl[index];
905 MReleaseWriteLock(&afs_xdcache);
907 for (i = 0; i < dcListCount; i++) {
910 ObtainWriteLock(&tdc->lock, 679);
912 if (vType(avc) == VDIR)
914 ReleaseWriteLock(&tdc->lock);
918 osi_Free(dcList, dcListMax * sizeof(struct dcache *));
925 * Extend a cache file
927 * \param avc pointer to vcache to extend data for
928 * \param alen Length to extend file to
931 * \note avc must be write locked. May release and reobtain avc and GLOCK
934 afs_ExtendSegments(struct vcache *avc, afs_size_t alen, struct vrequest *areq) {
935 afs_size_t offset, toAdd;
936 struct osi_file *tfile;
941 zeros = (void *) afs_osi_Alloc(AFS_PAGESIZE);
944 memset(zeros, 0, AFS_PAGESIZE);
946 while (avc->m.Length < alen) {
947 tdc = afs_ObtainDCacheForWriting(avc, avc->m.Length, alen - avc->m.Length, areq, 0);
953 toAdd = alen - avc->m.Length;
955 offset = avc->m.Length - AFS_CHUNKTOBASE(tdc->f.chunk);
956 if (offset + toAdd > AFS_CHUNKTOSIZE(tdc->f.chunk)) {
957 toAdd = AFS_CHUNKTOSIZE(tdc->f.chunk) - offset;
959 #if defined(LINUX_USE_FH)
960 tfile = afs_CFileOpen(&tdc->f.fh, tdc->f.fh_type);
962 tfile = afs_CFileOpen(tdc->f.inode);
964 while(tdc->validPos < avc->m.Length + toAdd) {
967 towrite = (avc->m.Length + toAdd) - tdc->validPos;
968 if (towrite > AFS_PAGESIZE) towrite = AFS_PAGESIZE;
970 code = afs_CFileWrite(tfile,
971 tdc->validPos - AFS_CHUNKTOBASE(tdc->f.chunk),
973 tdc->validPos += towrite;
975 afs_CFileClose(tfile);
976 afs_AdjustSize(tdc, offset + toAdd );
977 avc->m.Length += toAdd;
978 ReleaseWriteLock(&tdc->lock);
982 afs_osi_Free(zeros, AFS_PAGESIZE);
987 * afs_TruncateAllSegments
990 * Truncate a cache file.
993 * avc : Ptr to vcache entry to truncate.
994 * alen : Number of bytes to make the file.
995 * areq : Ptr to request structure.
998 * Called with avc write-locked; in VFS40 systems, pvnLock is also
1002 afs_TruncateAllSegments(register struct vcache *avc, afs_size_t alen,
1003 struct vrequest *areq, struct AFS_UCRED *acred)
1005 register struct dcache *tdc;
1006 register afs_int32 code;
1007 register afs_int32 index;
1011 struct dcache **tdcArray;
1013 AFS_STATCNT(afs_TruncateAllSegments);
1014 avc->m.Date = osi_Time();
1015 afs_Trace3(afs_iclSetp, CM_TRACE_TRUNCALL, ICL_TYPE_POINTER, avc,
1016 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1017 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(alen));
1018 if (alen >= avc->m.Length) {
1020 * Special speedup since Sun's vm extends the file this way;
1021 * we've never written to the file thus we can just set the new
1022 * length and avoid the needless calls below.
1023 * Also used for ftruncate calls which can extend the file.
1024 * To completely minimize the possible extra StoreMini RPC, we really
1025 * should keep the ExtendedPos as well and clear this flag if we
1026 * truncate below that value before we store the file back.
1028 avc->states |= CExtendedFile;
1029 avc->m.Length = alen;
1032 #if (defined(AFS_SUN5_ENV))
1034 /* Zero unused portion of last page */
1035 osi_VM_PreTruncate(avc, alen, acred);
1039 #if (defined(AFS_SUN5_ENV))
1040 ObtainWriteLock(&avc->vlock, 546);
1041 avc->activeV++; /* Block new getpages */
1042 ReleaseWriteLock(&avc->vlock);
1045 ReleaseWriteLock(&avc->lock);
1048 /* Flush pages beyond end-of-file. */
1049 osi_VM_Truncate(avc, alen, acred);
1052 ObtainWriteLock(&avc->lock, 79);
1054 avc->m.Length = alen;
1056 if (alen < avc->truncPos)
1057 avc->truncPos = alen;
1058 code = DVHash(&avc->fid);
1060 /* block out others from screwing with this table */
1061 MObtainWriteLock(&afs_xdcache, 287);
1064 for (index = afs_dvhashTbl[code]; index != NULLIDX;) {
1065 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
1066 tdc = afs_GetDSlot(index, 0);
1067 ReleaseReadLock(&tdc->tlock);
1068 if (!FidCmp(&tdc->f.fid, &avc->fid))
1072 index = afs_dvnextTbl[index];
1075 /* Now allocate space where we can save those dcache entries, and
1076 * do a second pass over them.. Since we're holding xdcache, it
1077 * shouldn't be changing.
1079 tdcArray = osi_Alloc(dcCount * sizeof(struct dcache *));
1082 for (index = afs_dvhashTbl[code]; index != NULLIDX;) {
1083 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
1084 tdc = afs_GetDSlot(index, 0);
1085 ReleaseReadLock(&tdc->tlock);
1086 if (!FidCmp(&tdc->f.fid, &avc->fid)) {
1087 /* same file, and modified, we'll store it back */
1088 if (dcPos < dcCount) {
1089 tdcArray[dcPos++] = tdc;
1097 index = afs_dvnextTbl[index];
1100 MReleaseWriteLock(&afs_xdcache);
1102 /* Now we loop over the array of dcache entries and truncate them */
1103 for (index = 0; index < dcPos; index++) {
1104 struct osi_file *tfile;
1106 tdc = tdcArray[index];
1108 newSize = alen - AFS_CHUNKTOBASE(tdc->f.chunk);
1111 ObtainSharedLock(&tdc->lock, 672);
1112 if (newSize < tdc->f.chunkBytes) {
1113 UpgradeSToWLock(&tdc->lock, 673);
1114 #if defined(LINUX_USE_FH)
1115 tfile = afs_CFileOpen(&tdc->f.fh, tdc->f.fh_type);
1117 tfile = afs_CFileOpen(tdc->f.inode);
1119 afs_CFileTruncate(tfile, newSize);
1120 afs_CFileClose(tfile);
1121 afs_AdjustSize(tdc, newSize);
1122 if (alen < tdc->validPos) {
1123 if (alen < AFS_CHUNKTOBASE(tdc->f.chunk))
1126 tdc->validPos = alen;
1128 ConvertWToSLock(&tdc->lock);
1130 ReleaseSharedLock(&tdc->lock);
1134 osi_Free(tdcArray, dcCount * sizeof(struct dcache *));
1136 #if (defined(AFS_SUN5_ENV))
1137 ObtainWriteLock(&avc->vlock, 547);
1138 if (--avc->activeV == 0 && (avc->vstates & VRevokeWait)) {
1139 avc->vstates &= ~VRevokeWait;
1140 afs_osi_Wakeup((char *)&avc->vstates);
1142 ReleaseWriteLock(&avc->vlock);