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);
219 ConvertWToSLock(&avc->lock);
222 * Subsequent code expects a sorted list, and it expects all the
223 * chunks in the list to be contiguous, so we need a sort and a
224 * while loop in here, too - but this will work for a first pass...
225 * 92.10.05 - OK, there's a sort in here now. It's kind of a modified
226 * bin sort, I guess. Chunk numbers start with 0
228 * - Have to get a write lock on xdcache because GetDSlot might need it (if
229 * the chunk doesn't have a dcache struct).
230 * This seems like overkill in most cases.
231 * - I'm not sure that it's safe to do "index = .hvNextp", then unlock
232 * xdcache, then relock xdcache and try to use index. It is done
233 * a lot elsewhere in the CM, but I'm not buying that argument.
234 * - should be able to check IFDataMod without doing the GetDSlot (just
235 * hold afs_xdcache). That way, it's easy to do this without the
236 * writelock on afs_xdcache, and we save unneccessary disk
237 * operations. I don't think that works, 'cuz the next pointers
240 origCBs = afs_allCBs;
243 tlen = avc->m.Length;
247 memset((char *)dcList, 0, NCHUNKSATONCE * sizeof(struct dcache *));
251 /* lock and start over from beginning of hash chain
252 * in order to avoid a race condition. */
253 MObtainWriteLock(&afs_xdcache, 284);
254 index = afs_dvhashTbl[hash];
256 for (j = 0; index != NULLIDX;) {
257 if ((afs_indexFlags[index] & IFDataMod)
258 && (afs_indexUnique[index] == avc->fid.Fid.Unique)) {
259 tdc = afs_GetDSlot(index, 0); /* refcount+1. */
260 ReleaseReadLock(&tdc->tlock);
261 if (!FidCmp(&tdc->f.fid, &avc->fid) && tdc->f.chunk >= minj) {
262 off = tdc->f.chunk - minj;
263 if (off < NCHUNKSATONCE) {
265 osi_Panic("dclist slot already in use!");
270 /* DCLOCKXXX: chunkBytes is protected by tdc->lock which we
271 * can't grab here, due to lock ordering with afs_xdcache.
272 * So, disable this shortcut for now. -- kolya 2001-10-13
274 /* shortcut: big win for little files */
275 /* tlen -= tdc->f.chunkBytes;
282 if (j == NCHUNKSATONCE)
289 index = afs_dvnextTbl[index];
291 MReleaseWriteLock(&afs_xdcache);
293 /* this guy writes chunks, puts back dcache structs, and bumps newDV */
294 /* "moredata" just says "there are more dirty chunks yet to come".
298 static afs_uint32 lp1 = 10000, lp2 = 10000;
300 struct AFSStoreStatus InStatus;
301 struct AFSFetchStatus OutStatus;
303 afs_size_t base, bytes;
306 unsigned int first = 0;
309 struct osi_file *tfile;
310 struct rx_call *tcall;
312 for (bytes = 0, j = 0; !code && j <= high; j++) {
314 ObtainSharedLock(&(dcList[j]->lock), 629);
317 bytes += dcList[j]->f.chunkBytes;
318 if ((dcList[j]->f.chunkBytes < afs_OtherCSize)
319 && (dcList[j]->f.chunk - minj < high)
321 int sbytes = afs_OtherCSize - dcList[j]->f.chunkBytes;
325 if (bytes && (j == high || !dcList[j + 1])) {
326 /* base = AFS_CHUNKTOBASE(dcList[first]->f.chunk); */
327 base = AFS_CHUNKTOBASE(first + minj);
330 * take a list of dcache structs and send them all off to the server
331 * the list must be in order, and the chunks contiguous.
332 * Note - there is no locking done by this code currently. For
333 * safety's sake, xdcache could be locked over the entire call.
334 * However, that pretty well ties up all the threads. Meantime, all
335 * the chunks _MUST_ have their refcounts bumped.
336 * The writes done before a store back will clear setuid-ness
338 * We can permit CacheStoreProc to wake up the user process IFF we
339 * are doing the last RPC for this close, ie, storing back the last
340 * set of contiguous chunks of a file.
343 dclist = &dcList[first];
344 nchunks = 1 + j - first;
345 nomore = !(moredata || (j != high));
346 InStatus.ClientModTime = avc->m.Date;
347 InStatus.Mask = AFS_SETMODTIME;
348 if (sync & AFS_SYNC) {
349 InStatus.Mask |= AFS_FSYNC;
351 tlen = lmin(avc->m.Length, avc->truncPos);
352 afs_Trace4(afs_iclSetp, CM_TRACE_STOREDATA64,
353 ICL_TYPE_FID, &avc->fid.Fid, ICL_TYPE_OFFSET,
354 ICL_HANDLE_OFFSET(base), ICL_TYPE_OFFSET,
355 ICL_HANDLE_OFFSET(bytes), ICL_TYPE_OFFSET,
356 ICL_HANDLE_OFFSET(tlen));
360 tc = afs_Conn(&avc->fid, areq, 0);
364 tcall = rx_NewCall(tc->id);
365 #ifdef AFS_64BIT_CLIENT
366 if (!afs_serverHasNo64Bit(tc)) {
368 StartRXAFS_StoreData64(tcall,
374 if (tlen > 0xFFFFFFFF) {
377 afs_int32 t1, t2, t3;
382 StartRXAFS_StoreData(tcall,
389 #else /* AFS_64BIT_CLIENT */
391 StartRXAFS_StoreData(tcall,
392 (struct AFSFid *)&avc->
393 fid.Fid, &InStatus, base,
395 #endif /* AFS_64BIT_CLIENT */
402 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STOREDATA);
403 avc->truncPos = AFS_NOTRUNC;
405 for (i = 0; i < nchunks && !code; i++) {
408 afs_warn("afs: missing dcache!\n");
410 continue; /* panic? */
412 afs_Trace4(afs_iclSetp, CM_TRACE_STOREALL2,
413 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32,
414 tdc->f.chunk, ICL_TYPE_INT32,
415 tdc->index, ICL_TYPE_INT32,
419 if (avc->asynchrony == -1) {
420 if (afs_defaultAsynchrony >
422 shouldwake = &nomore;
424 } else if ((afs_uint32) avc->asynchrony >=
426 shouldwake = &nomore;
429 tfile = afs_CFileOpen(tdc->f.inode);
432 &(afs_stats_cmfullperf.rpc.
434 [AFS_STATS_FS_XFERIDX_STOREDATA]);
435 osi_GetuTime(&xferStartTime);
438 afs_CacheStoreProc(tcall, tfile,
439 tdc->f.chunkBytes, avc,
440 shouldwake, &bytesToXfer,
443 osi_GetuTime(&xferStopTime);
446 (xferP->numSuccesses)++;
447 afs_stats_XferSumBytes
448 [AFS_STATS_FS_XFERIDX_STOREDATA] +=
451 (afs_stats_XferSumBytes
452 [AFS_STATS_FS_XFERIDX_STOREDATA] >> 10);
453 afs_stats_XferSumBytes
454 [AFS_STATS_FS_XFERIDX_STOREDATA] &= 0x3FF;
455 if (bytesXferred < xferP->minBytes)
456 xferP->minBytes = bytesXferred;
457 if (bytesXferred > xferP->maxBytes)
458 xferP->maxBytes = bytesXferred;
461 * Tally the size of the object. Note: we tally the actual size,
462 * NOT the number of bytes that made it out over the wire.
464 if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET0)
466 else if (bytesToXfer <=
467 AFS_STATS_MAXBYTES_BUCKET1)
469 else if (bytesToXfer <=
470 AFS_STATS_MAXBYTES_BUCKET2)
472 else if (bytesToXfer <=
473 AFS_STATS_MAXBYTES_BUCKET3)
475 else if (bytesToXfer <=
476 AFS_STATS_MAXBYTES_BUCKET4)
478 else if (bytesToXfer <=
479 AFS_STATS_MAXBYTES_BUCKET5)
481 else if (bytesToXfer <=
482 AFS_STATS_MAXBYTES_BUCKET6)
484 else if (bytesToXfer <=
485 AFS_STATS_MAXBYTES_BUCKET7)
490 afs_stats_GetDiff(elapsedTime, xferStartTime,
492 afs_stats_AddTo((xferP->sumTime),
494 afs_stats_SquareAddTo((xferP->sqrTime),
496 if (afs_stats_TimeLessThan
497 (elapsedTime, (xferP->minTime))) {
498 afs_stats_TimeAssign((xferP->minTime),
501 if (afs_stats_TimeGreaterThan
502 (elapsedTime, (xferP->maxTime))) {
503 afs_stats_TimeAssign((xferP->maxTime),
509 afs_CacheStoreProc(tcall, tfile,
510 tdc->f.chunkBytes, avc,
511 shouldwake, &lp1, &lp2);
512 #endif /* AFS_NOSTATS */
513 afs_CFileClose(tfile);
514 if ((tdc->f.chunkBytes < afs_OtherCSize)
515 && (i < (nchunks - 1)) && code == 0) {
516 int bsent, tlen, sbytes =
517 afs_OtherCSize - tdc->f.chunkBytes;
519 osi_AllocLargeSpace(AFS_LRALLOCSIZ);
524 AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ :
526 memset(tbuffer, 0, tlen);
528 bsent = rx_Write(tcall, tbuffer, tlen);
532 code = -33; /* XXX */
537 osi_FreeLargeSpace(tbuffer);
539 stored += tdc->f.chunkBytes;
541 /* ideally, I'd like to unlock the dcache and turn
542 * off the writing bit here, but that would
543 * require being able to retry StoreAllSegments in
544 * the event of a failure. It only really matters
545 * if user can't read from a 'locked' dcache or
546 * one which has the writing bit turned on. */
549 struct AFSVolSync tsync;
552 EndRXAFS_StoreData(tcall, &OutStatus, &tsync);
557 doProcessFS = 1; /* Flag to run afs_ProcessFS() later on */
562 code2 = rx_EndCall(tcall, code);
567 #ifdef AFS_64BIT_CLIENT
568 if (code == RXGEN_OPCODE && !afs_serverHasNo64Bit(tc)) {
569 afs_serverSetNo64Bit(tc);
572 #endif /* AFS_64BIT_CLIENT */
574 (tc, code, &avc->fid, areq,
575 AFS_STATS_FS_RPCIDX_STOREDATA, SHARED_LOCK,
578 /* put back all remaining locked dcache entries */
579 for (i = 0; i < nchunks; i++) {
582 if (afs_indexFlags[tdc->index] & IFDataMod) {
584 * LOCKXXX -- should hold afs_xdcache(W) when
585 * modifying afs_indexFlags.
587 afs_indexFlags[tdc->index] &= ~IFDataMod;
588 afs_stats_cmperf.cacheCurrDirtyChunks--;
589 afs_indexFlags[tdc->index] &= ~IFDirtyPages;
590 if (sync & AFS_VMSYNC_INVAL) {
591 /* since we have invalidated all the pages of this
592 ** vnode by calling osi_VM_TryToSmush, we can
593 ** safely mark this dcache entry as not having
594 ** any pages. This vnode now becomes eligible for
595 ** reclamation by getDownD.
597 afs_indexFlags[tdc->index] &= ~IFAnyPages;
601 UpgradeSToWLock(&tdc->lock, 628);
602 tdc->f.states &= ~DWriting; /* correct? */
603 tdc->dflags |= DFEntryMod;
604 ReleaseWriteLock(&tdc->lock);
606 /* Mark the entry as released */
611 /* Now copy out return params */
612 UpgradeSToWLock(&avc->lock, 28); /* keep out others for a while */
613 afs_ProcessFS(avc, &OutStatus, areq);
614 /* Keep last (max) size of file on server to see if
615 * we need to call afs_StoreMini to extend the file.
618 maxStoredLength = OutStatus.Length;
619 ConvertWToSLock(&avc->lock);
624 for (j++; j <= high; j++) {
626 ReleaseSharedLock(&(dcList[j]->lock));
627 afs_PutDCache(dcList[j]);
628 /* Releasing entry */
634 afs_Trace2(afs_iclSetp, CM_TRACE_STOREALLDCDONE,
635 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code);
640 /* Release any zero-length dcache entries in our interval
641 * that we locked but didn't store back above.
643 for (j = 0; j <= high; j++) {
646 osi_Assert(tdc->f.chunkBytes == 0);
647 ReleaseSharedLock(&tdc->lock);
653 minj += NCHUNKSATONCE;
654 } while (!code && moredata);
656 UpgradeSToWLock(&avc->lock, 29);
658 /* send a trivial truncation store if did nothing else */
661 * Call StoreMini if we haven't written enough data to extend the
662 * file at the fileserver to the client's notion of the file length.
664 if ((avc->truncPos != AFS_NOTRUNC) || ((avc->states & CExtendedFile)
665 && (maxStoredLength <
667 code = afs_StoreMini(avc, areq);
669 hadd32(newDV, 1); /* just bumped here, too */
671 avc->states &= ~CExtendedFile;
675 * Finally, turn off DWriting, turn on DFEntryMod,
676 * update f.versionNo.
677 * A lot of this could be integrated into the loop above
687 memset((char *)dcList, 0,
688 NCHUNKSATONCE * sizeof(struct dcache *));
690 /* overkill, but it gets the lock in case GetDSlot needs it */
691 MObtainWriteLock(&afs_xdcache, 285);
693 for (j = 0, safety = 0, index = afs_dvhashTbl[hash];
694 index != NULLIDX && safety < afs_cacheFiles + 2;) {
696 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
697 tdc = afs_GetDSlot(index, 0);
698 ReleaseReadLock(&tdc->tlock);
700 if (!FidCmp(&tdc->f.fid, &avc->fid)
701 && tdc->f.chunk >= minj) {
702 off = tdc->f.chunk - minj;
703 if (off < NCHUNKSATONCE) {
704 /* this is the file, and the correct chunk range */
705 if (j >= NCHUNKSATONCE)
707 ("Too many dcache entries in range\n");
712 if (j == NCHUNKSATONCE)
720 index = afs_dvnextTbl[index];
722 MReleaseWriteLock(&afs_xdcache);
724 for (i = 0; i < j; i++) {
725 /* Iterate over the dcache entries we collected above */
727 ObtainSharedLock(&tdc->lock, 677);
729 /* was code here to clear IFDataMod, but it should only be done
730 * in storedcache and storealldcache.
732 /* Only increase DV if we had up-to-date data to start with.
733 * Otherwise, we could be falsely upgrading an old chunk
734 * (that we never read) into one labelled with the current
735 * DV #. Also note that we check that no intervening stores
736 * occurred, otherwise we might mislabel cache information
737 * for a chunk that we didn't store this time
739 /* Don't update the version number if it's not yet set. */
740 if (!hsame(tdc->f.versionNo, h_unset)
741 && hcmp(tdc->f.versionNo, oldDV) >= 0) {
743 if ((!(afs_dvhack || foreign)
744 && hsame(avc->m.DataVersion, newDV))
745 || ((afs_dvhack || foreign)
746 && (origCBs == afs_allCBs))) {
747 /* no error, this is the DV */
749 UpgradeSToWLock(&tdc->lock, 678);
750 hset(tdc->f.versionNo, avc->m.DataVersion);
751 tdc->dflags |= DFEntryMod;
752 ConvertWToSLock(&tdc->lock);
756 ReleaseSharedLock(&tdc->lock);
760 minj += NCHUNKSATONCE;
767 * Invalidate chunks after an error for ccores files since
768 * afs_inactive won't be called for these and they won't be
769 * invalidated. Also discard data if it's a permanent error from the
772 if (areq->permWriteError || (avc->states & (CCore1 | CCore))) {
773 afs_InvalidateAllSegments(avc);
776 afs_Trace3(afs_iclSetp, CM_TRACE_STOREALLDONE, ICL_TYPE_POINTER, avc,
777 ICL_TYPE_INT32, avc->m.Length, ICL_TYPE_INT32, code);
778 /* would like a Trace5, but it doesn't exist... */
779 afs_Trace3(afs_iclSetp, CM_TRACE_AVCLOCKER, ICL_TYPE_POINTER, avc,
780 ICL_TYPE_INT32, avc->lock.wait_states, ICL_TYPE_INT32,
781 avc->lock.excl_locked);
782 afs_Trace4(afs_iclSetp, CM_TRACE_AVCLOCKEE, ICL_TYPE_POINTER, avc,
783 ICL_TYPE_INT32, avc->lock.wait_states, ICL_TYPE_INT32,
784 avc->lock.readers_reading, ICL_TYPE_INT32,
785 avc->lock.num_waiting);
788 * Finally, if updated DataVersion matches newDV, we did all of the
789 * stores. If mapDV indicates that the page cache was flushed up
790 * to when we started the store, then we can relabel them as flushed
791 * as recently as newDV.
792 * Turn off CDirty bit because the stored data is now in sync with server.
794 if (code == 0 && hcmp(avc->mapDV, oldDV) >= 0) {
795 if ((!(afs_dvhack || foreign) && hsame(avc->m.DataVersion, newDV))
796 || ((afs_dvhack || foreign) && (origCBs == afs_allCBs))) {
797 hset(avc->mapDV, newDV);
798 avc->states &= ~CDirty;
801 osi_FreeLargeSpace(dcList);
803 /* If not the final write a temporary error is ok. */
804 if (code && !areq->permWriteError && !(sync & AFS_LASTSTORE))
809 } /*afs_StoreAllSegments (new 03/02/94) */
813 * afs_InvalidateAllSegments
816 * Invalidates all chunks for a given file
819 * avc : Pointer to vcache entry.
822 * For example, called after an error has been detected. Called
823 * with avc write-locked, and afs_xdcache unheld.
827 afs_InvalidateAllSegments(struct vcache *avc)
832 struct dcache **dcList;
833 int i, dcListMax, dcListCount;
835 AFS_STATCNT(afs_InvalidateAllSegments);
836 afs_Trace2(afs_iclSetp, CM_TRACE_INVALL, ICL_TYPE_POINTER, avc,
837 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
838 hash = DVHash(&avc->fid);
839 avc->truncPos = AFS_NOTRUNC; /* don't truncate later */
840 avc->states &= ~CExtendedFile; /* not any more */
841 ObtainWriteLock(&afs_xcbhash, 459);
842 afs_DequeueCallback(avc);
843 avc->states &= ~(CStatd | CDirty); /* mark status information as bad, too */
844 ReleaseWriteLock(&afs_xcbhash);
845 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
846 osi_dnlc_purgedp(avc);
847 /* Blow away pages; for now, only for Solaris */
848 #if (defined(AFS_SUN5_ENV))
849 if (WriteLocked(&avc->lock))
850 osi_ReleaseVM(avc, (struct AFS_UCRED *)0);
853 * Block out others from screwing with this table; is a read lock
856 MObtainWriteLock(&afs_xdcache, 286);
859 for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
860 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
861 tdc = afs_GetDSlot(index, 0);
862 ReleaseReadLock(&tdc->tlock);
863 if (!FidCmp(&tdc->f.fid, &avc->fid))
867 index = afs_dvnextTbl[index];
870 dcList = osi_Alloc(dcListMax * sizeof(struct dcache *));
873 for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
874 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
875 tdc = afs_GetDSlot(index, 0);
876 ReleaseReadLock(&tdc->tlock);
877 if (!FidCmp(&tdc->f.fid, &avc->fid)) {
878 /* same file? we'll zap it */
879 if (afs_indexFlags[index] & IFDataMod) {
880 afs_stats_cmperf.cacheCurrDirtyChunks--;
881 /* don't write it back */
882 afs_indexFlags[index] &= ~IFDataMod;
884 afs_indexFlags[index] &= ~IFAnyPages;
885 if (dcListCount < dcListMax)
886 dcList[dcListCount++] = tdc;
893 index = afs_dvnextTbl[index];
895 MReleaseWriteLock(&afs_xdcache);
897 for (i = 0; i < dcListCount; i++) {
900 ObtainWriteLock(&tdc->lock, 679);
902 if (vType(avc) == VDIR)
904 ReleaseWriteLock(&tdc->lock);
908 osi_Free(dcList, dcListMax * sizeof(struct dcache *));
915 * afs_TruncateAllSegments
918 * Truncate a cache file.
921 * avc : Ptr to vcache entry to truncate.
922 * alen : Number of bytes to make the file.
923 * areq : Ptr to request structure.
926 * Called with avc write-locked; in VFS40 systems, pvnLock is also
930 afs_TruncateAllSegments(register struct vcache *avc, afs_size_t alen,
931 struct vrequest *areq, struct AFS_UCRED *acred)
933 register struct dcache *tdc;
934 register afs_int32 code;
935 register afs_int32 index;
939 struct dcache **tdcArray;
941 AFS_STATCNT(afs_TruncateAllSegments);
942 avc->m.Date = osi_Time();
943 afs_Trace3(afs_iclSetp, CM_TRACE_TRUNCALL, ICL_TYPE_POINTER, avc,
944 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
945 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(alen));
946 if (alen >= avc->m.Length) {
948 * Special speedup since Sun's vm extends the file this way;
949 * we've never written to the file thus we can just set the new
950 * length and avoid the needless calls below.
951 * Also used for ftruncate calls which can extend the file.
952 * To completely minimize the possible extra StoreMini RPC, we really
953 * should keep the ExtendedPos as well and clear this flag if we
954 * truncate below that value before we store the file back.
956 avc->states |= CExtendedFile;
957 avc->m.Length = alen;
960 #if (defined(AFS_SUN5_ENV))
962 /* Zero unused portion of last page */
963 osi_VM_PreTruncate(avc, alen, acred);
967 #if (defined(AFS_SUN5_ENV))
968 ObtainWriteLock(&avc->vlock, 546);
969 avc->activeV++; /* Block new getpages */
970 ReleaseWriteLock(&avc->vlock);
973 ReleaseWriteLock(&avc->lock);
976 /* Flush pages beyond end-of-file. */
977 osi_VM_Truncate(avc, alen, acred);
980 ObtainWriteLock(&avc->lock, 79);
982 avc->m.Length = alen;
984 if (alen < avc->truncPos)
985 avc->truncPos = alen;
986 code = DVHash(&avc->fid);
988 /* block out others from screwing with this table */
989 MObtainWriteLock(&afs_xdcache, 287);
992 for (index = afs_dvhashTbl[code]; index != NULLIDX;) {
993 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
994 tdc = afs_GetDSlot(index, 0);
995 ReleaseReadLock(&tdc->tlock);
996 if (!FidCmp(&tdc->f.fid, &avc->fid))
1000 index = afs_dvnextTbl[index];
1003 /* Now allocate space where we can save those dcache entries, and
1004 * do a second pass over them.. Since we're holding xdcache, it
1005 * shouldn't be changing.
1007 tdcArray = osi_Alloc(dcCount * sizeof(struct dcache *));
1010 for (index = afs_dvhashTbl[code]; index != NULLIDX;) {
1011 if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
1012 tdc = afs_GetDSlot(index, 0);
1013 ReleaseReadLock(&tdc->tlock);
1014 if (!FidCmp(&tdc->f.fid, &avc->fid)) {
1015 /* same file, and modified, we'll store it back */
1016 if (dcPos < dcCount) {
1017 tdcArray[dcPos++] = tdc;
1025 index = afs_dvnextTbl[index];
1028 MReleaseWriteLock(&afs_xdcache);
1030 /* Now we loop over the array of dcache entries and truncate them */
1031 for (index = 0; index < dcPos; index++) {
1032 struct osi_file *tfile;
1034 tdc = tdcArray[index];
1036 newSize = alen - AFS_CHUNKTOBASE(tdc->f.chunk);
1039 ObtainSharedLock(&tdc->lock, 672);
1040 if (newSize < tdc->f.chunkBytes) {
1041 UpgradeSToWLock(&tdc->lock, 673);
1042 tfile = afs_CFileOpen(tdc->f.inode);
1043 afs_CFileTruncate(tfile, newSize);
1044 afs_CFileClose(tfile);
1045 afs_AdjustSize(tdc, newSize);
1046 if (alen < tdc->validPos) {
1047 if (alen < AFS_CHUNKTOBASE(tdc->f.chunk))
1050 tdc->validPos = alen;
1052 ConvertWToSLock(&tdc->lock);
1054 ReleaseSharedLock(&tdc->lock);
1058 osi_Free(tdcArray, dcCount * sizeof(struct dcache *));
1060 #if (defined(AFS_SUN5_ENV))
1061 ObtainWriteLock(&avc->vlock, 547);
1062 if (--avc->activeV == 0 && (avc->vstates & VRevokeWait)) {
1063 avc->vstates &= ~VRevokeWait;
1064 afs_osi_Wakeup((char *)&avc->vstates);
1066 ReleaseWriteLock(&avc->vlock);