2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afsconfig.h>
11 #include "afs/param.h"
13 #include "afs/sysincludes.h" /* Standard vendor system headers */
14 #ifndef AFS_LINUX22_ENV
15 #include "rpc/types.h"
22 #endif /* AFS_ALPHA_ENV */
23 #include "afsincludes.h" /* Afs-based standard headers */
24 #include "afs/afs_stats.h" /* statistics */
25 #include "afs_prototypes.h"
27 extern int cacheDiskType;
31 FillStoreStats(int code, int idx, osi_timeval_t xferStartTime,
32 afs_size_t bytesToXfer, afs_size_t bytesXferred)
34 struct afs_stats_xferData *xferP;
35 osi_timeval_t xferStopTime;
36 osi_timeval_t elapsedTime;
38 xferP = &(afs_stats_cmfullperf.rpc.fsXferTimes[idx]);
39 osi_GetuTime(&xferStopTime);
42 (xferP->numSuccesses)++;
43 afs_stats_XferSumBytes[idx] += bytesXferred;
44 (xferP->sumBytes) += (afs_stats_XferSumBytes[idx] >> 10);
45 afs_stats_XferSumBytes[idx] &= 0x3FF;
46 if (bytesXferred < xferP->minBytes)
47 xferP->minBytes = bytesXferred;
48 if (bytesXferred > xferP->maxBytes)
49 xferP->maxBytes = bytesXferred;
52 * Tally the size of the object. Note: we tally the actual size,
53 * NOT the number of bytes that made it out over the wire.
55 if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET0) (xferP->count[0])++;
56 else if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET1) (xferP->count[1])++;
57 else if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET2) (xferP->count[2])++;
58 else if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET3) (xferP->count[3])++;
59 else if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET4) (xferP->count[4])++;
60 else if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET5) (xferP->count[5])++;
61 else if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET6) (xferP->count[6])++;
62 else if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET7) (xferP->count[7])++;
66 afs_stats_GetDiff(elapsedTime, xferStartTime, xferStopTime);
67 afs_stats_AddTo((xferP->sumTime), elapsedTime);
68 afs_stats_SquareAddTo((xferP->sqrTime), elapsedTime);
69 if (afs_stats_TimeLessThan(elapsedTime, (xferP->minTime))) {
70 afs_stats_TimeAssign((xferP->minTime), elapsedTime);
72 if (afs_stats_TimeGreaterThan(elapsedTime, (xferP->maxTime))) {
73 afs_stats_TimeAssign((xferP->maxTime), elapsedTime);
77 #endif /* AFS_NOSTATS */
79 /* rock and operations for RX_FILESERVER */
84 rxfs_storeUfsPrepare(void *r, afs_uint32 size, afs_uint32 *tlen)
86 *tlen = (size > AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ : size);
91 rxfs_storeMemPrepare(void *r, afs_uint32 size, afs_uint32 *tlen)
94 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *) r;
97 code = rx_WritevAlloc(v->call, v->tiov, &v->tnio, RX_MAXIOVECS, size);
100 code = rx_Error(v->call);
112 rxfs_storeUfsRead(void *r, struct osi_file *tfile, afs_uint32 offset,
113 afs_uint32 tlen, afs_uint32 *bytesread)
116 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)r;
119 code = afs_osi_Read(tfile, -1, v->tbuffer, tlen);
125 #if defined(KERNEL_HAVE_UERROR)
133 rxfs_storeMemRead(void *r, struct osi_file *tfile, afs_uint32 offset,
134 afs_uint32 tlen, afs_uint32 *bytesread)
137 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)r;
138 struct memCacheEntry *mceP = (struct memCacheEntry *)tfile;
141 code = afs_MemReadvBlk(mceP, offset, v->tiov, v->tnio, tlen);
149 rxfs_storeMemWrite(void *r, afs_uint32 l, afs_uint32 *byteswritten)
152 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)r;
155 code = rx_Writev(v->call, v->tiov, v->tnio, l);
158 code = rx_Error(v->call);
159 return (code ? code : -33);
161 *byteswritten = code;
166 rxfs_storeUfsWrite(void *r, afs_uint32 l, afs_uint32 *byteswritten)
169 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)r;
172 code = rx_Write(v->call, v->tbuffer, l);
173 /* writing 0 bytes will
174 * push a short packet. Is that really what we want, just because the
175 * data didn't come back from the disk yet? Let's try it and see. */
178 code = rx_Error(v->call);
179 return (code ? code : -33);
181 *byteswritten = code;
186 rxfs_storePadd(void *rock, afs_uint32 size)
190 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)rock;
193 v->tbuffer = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
194 memset(v->tbuffer, 0, AFS_LRALLOCSIZ);
197 tlen = (size > AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ : size);
199 code = rx_Write(v->call, v->tbuffer, tlen);
203 return -33; /* XXX */
210 rxfs_storeStatus(void *rock)
212 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)rock;
214 if (rx_GetRemoteStatus(v->call) & 1)
220 rxfs_storeClose(void *r, struct AFSFetchStatus *OutStatus, int *doProcessFS)
223 struct AFSVolSync tsync;
224 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)r;
229 #ifdef AFS_64BIT_CLIENT
231 code = EndRXAFS_StoreData64(v->call, OutStatus, &tsync);
234 code = EndRXAFS_StoreData(v->call, OutStatus, &tsync);
237 *doProcessFS = 1; /* Flag to run afs_ProcessFS() later on */
243 rxfs_storeDestroy(void **r, afs_int32 code)
245 struct rxfs_storeVariables *v = (struct rxfs_storeVariables *)*r;
250 code = rx_EndCall(v->call, code);
254 osi_FreeLargeSpace(v->tbuffer);
256 osi_FreeSmallSpace(v->tiov);
257 osi_FreeSmallSpace(v);
262 afs_GenericStoreProc(struct storeOps *ops, void *rock,
263 struct dcache *tdc, int *shouldwake,
264 afs_size_t *bytesXferred)
266 struct rxfs_storeVariables *svar = rock;
267 afs_uint32 tlen, bytesread, byteswritten;
271 struct osi_file *tfile;
273 size = tdc->f.chunkBytes;
275 tfile = afs_CFileOpen(&tdc->f.inode);
278 code = (*ops->prepare)(rock, size, &tlen);
282 code = (*ops->read)(rock, tfile, offset, tlen, &bytesread);
287 code = (*ops->write)(rock, tlen, &byteswritten);
291 *bytesXferred += byteswritten;
292 #endif /* AFS_NOSTATS */
297 * if file has been locked on server, can allow
300 if (shouldwake && *shouldwake && ((*ops->status)(rock) == 0)) {
301 *shouldwake = 0; /* only do this once */
302 afs_wakeup(svar->vcache);
305 afs_CFileClose(tfile);
311 struct storeOps rxfs_storeUfsOps = {
312 #ifndef HAVE_STRUCT_LABEL_SUPPORT
313 rxfs_storeUfsPrepare,
322 .prepare = rxfs_storeUfsPrepare,
323 .read = rxfs_storeUfsRead,
324 .write = rxfs_storeUfsWrite,
325 .status = rxfs_storeStatus,
326 .padd = rxfs_storePadd,
327 .close = rxfs_storeClose,
328 .destroy = rxfs_storeDestroy,
329 #ifdef AFS_LINUX26_ENV
330 .storeproc = afs_linux_storeproc
332 .storeproc = afs_GenericStoreProc
338 struct storeOps rxfs_storeMemOps = {
339 #ifndef HAVE_STRUCT_LABEL_SUPPORT
340 rxfs_storeMemPrepare,
349 .prepare = rxfs_storeMemPrepare,
350 .read = rxfs_storeMemRead,
351 .write = rxfs_storeMemWrite,
352 .status = rxfs_storeStatus,
353 .padd = rxfs_storePadd,
354 .close = rxfs_storeClose,
355 .destroy = rxfs_storeDestroy,
356 .storeproc = afs_GenericStoreProc
361 rxfs_storeInit(struct vcache *avc, struct afs_conn *tc,
362 struct rx_connection *rxconn, afs_size_t base,
363 afs_size_t bytes, afs_size_t length,
364 int sync, struct storeOps **ops, void **rock)
367 struct rxfs_storeVariables *v;
372 v = osi_AllocSmallSpace(sizeof(struct rxfs_storeVariables));
374 osi_Panic("rxfs_storeInit: osi_AllocSmallSpace returned NULL\n");
375 memset(v, 0, sizeof(struct rxfs_storeVariables));
377 v->InStatus.ClientModTime = avc->f.m.Date;
378 v->InStatus.Mask = AFS_SETMODTIME;
381 v->InStatus.Mask |= AFS_FSYNC;
383 v->call = rx_NewCall(rxconn);
385 #ifdef AFS_64BIT_CLIENT
386 if (!afs_serverHasNo64Bit(tc))
387 code = StartRXAFS_StoreData64(
388 v->call, (struct AFSFid*)&avc->f.fid.Fid,
389 &v->InStatus, base, bytes, length);
391 if (length > 0xFFFFFFFF)
394 afs_int32 t1 = base, t2 = bytes, t3 = length;
395 code = StartRXAFS_StoreData(v->call,
396 (struct AFSFid *) &avc->f.fid.Fid,
397 &v->InStatus, t1, t2, t3);
401 #else /* AFS_64BIT_CLIENT */
402 code = StartRXAFS_StoreData(v->call, (struct AFSFid *)&avc->f.fid.Fid,
403 &v->InStatus, base, bytes, length);
404 #endif /* AFS_64BIT_CLIENT */
409 osi_FreeSmallSpace(v);
412 if (cacheDiskType == AFS_FCACHE_TYPE_UFS) {
413 v->tbuffer = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
416 ("rxfs_storeInit: osi_AllocLargeSpace for iovecs returned NULL\n");
417 *ops = (struct storeOps *) &rxfs_storeUfsOps;
419 v->tiov = osi_AllocSmallSpace(sizeof(struct iovec) * RX_MAXIOVECS);
422 ("rxfs_storeInit: osi_AllocSmallSpace for iovecs returned NULL\n");
423 *ops = (struct storeOps *) &rxfs_storeMemOps;
425 /* do this at a higher level now -- it's a parameter */
426 /* for now, only do 'continue from close' code if file fits in one
427 * chunk. Could clearly do better: if only one modified chunk
428 * then can still do this. can do this on *last* modified chunk */
429 length = avc->f.m.Length - 1; /* byte position of last byte we'll store */
431 if (AFS_CHUNK(length) != 0)
442 unsigned int storeallmissing = 0;
444 * Called for each chunk upon store.
446 * \param avc Ptr to the vcache entry of the file being stored.
447 * \param dclist pointer to the list of dcaches
448 * \param bytes total number of bytes for the current operation
449 * \param anewDV Ptr to the dataversion after store
450 * \param doProcessFS pointer to the "do process FetchStatus" flag
451 * \param OutStatus pointer to the FetchStatus as returned by the fileserver
452 * \param nchunks number of dcaches to consider
453 * \param nomore copy of the "no more data" flag
454 * \param ops pointer to the block of storeOps to be used for this operation
455 * \param rock pointer to the opaque protocol-specific data of this operation
458 afs_CacheStoreDCaches(struct vcache *avc, struct dcache **dclist,
459 afs_size_t bytes, afs_hyper_t *anewDV, int *doProcessFS,
460 struct AFSFetchStatus *OutStatus, afs_uint32 nchunks,
461 int nomore, struct storeOps *ops, void *rock)
463 int *shouldwake = NULL;
467 afs_size_t bytesXferred;
470 osi_timeval_t xferStartTime; /*FS xfer start time */
471 afs_size_t bytesToXfer = 10000; /* # bytes to xfer */
472 #endif /* AFS_NOSTATS */
474 osi_Assert(nchunks != 0);
476 for (i = 0; i < nchunks && !code; i++) {
477 struct dcache *tdc = dclist[i];
481 afs_warn("afs: missing dcache!\n");
483 continue; /* panic? */
485 size = tdc->f.chunkBytes;
486 afs_Trace4(afs_iclSetp, CM_TRACE_STOREALL2, ICL_TYPE_POINTER, avc,
487 ICL_TYPE_INT32, tdc->f.chunk, ICL_TYPE_INT32, tdc->index,
488 ICL_TYPE_INT32, afs_inode2trace(&tdc->f.inode));
491 if (avc->asynchrony == -1) {
492 if (afs_defaultAsynchrony > (bytes - stored))
493 shouldwake = &nomore;
495 else if ((afs_uint32) avc->asynchrony >= (bytes - stored))
496 shouldwake = &nomore;
499 afs_Trace4(afs_iclSetp, CM_TRACE_STOREPROC, ICL_TYPE_POINTER, avc,
500 ICL_TYPE_FID, &(avc->f.fid), ICL_TYPE_OFFSET,
501 ICL_HANDLE_OFFSET(avc->f.m.Length), ICL_TYPE_INT32, size);
503 AFS_STATCNT(CacheStoreProc);
505 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STOREDATA);
506 avc->f.truncPos = AFS_NOTRUNC;
509 * In this case, size is *always* the amount of data we'll be trying
514 osi_GetuTime(&xferStartTime);
515 #endif /* AFS_NOSTATS */
518 code = (*ops->storeproc)(ops, rock, tdc, shouldwake,
521 afs_Trace4(afs_iclSetp, CM_TRACE_STOREPROC, ICL_TYPE_POINTER, avc,
522 ICL_TYPE_FID, &(avc->f.fid), ICL_TYPE_OFFSET,
523 ICL_HANDLE_OFFSET(avc->f.m.Length), ICL_TYPE_INT32, size);
526 FillStoreStats(code, AFS_STATS_FS_XFERIDX_STOREDATA,
527 xferStartTime, bytesToXfer, bytesXferred);
528 #endif /* AFS_NOSTATS */
530 if ((tdc->f.chunkBytes < afs_OtherCSize)
531 && (i < (nchunks - 1)) && code == 0) {
532 code = (*ops->padd)(rock, afs_OtherCSize - tdc->f.chunkBytes);
534 stored += tdc->f.chunkBytes;
535 /* ideally, I'd like to unlock the dcache and turn
536 * off the writing bit here, but that would
537 * require being able to retry StoreAllSegments in
538 * the event of a failure. It only really matters
539 * if user can't read from a 'locked' dcache or
540 * one which has the writing bit turned on. */
544 code = (*ops->close)(rock, OutStatus, doProcessFS);
545 /* if this succeeds, dv has been bumped. */
552 code = (*ops->destroy)(&rock, code);
554 /* if we errored, can't trust this. */
561 #define lmin(a,b) (((a) < (b)) ? (a) : (b))
565 * \param dclist pointer to the list of dcaches
566 * \param avc Ptr to the vcache entry.
567 * \param areq Ptr to the request structure
568 * \param sync sync flag
569 * \param minj the chunk offset for this call
570 * \param high index of last dcache to store
571 * \param moredata the moredata flag
572 * \param anewDV Ptr to the dataversion after store
573 * \param amaxStoredLength Ptr to the amount of that is actually stored
575 * \note Environment: Nothing interesting.
578 afs_CacheStoreVCache(struct dcache **dcList, struct vcache *avc,
579 struct vrequest *areq, int sync, unsigned int minj,
580 unsigned int high, unsigned int moredata,
581 afs_hyper_t *anewDV, afs_size_t *amaxStoredLength)
584 struct storeOps *ops;
588 struct AFSFetchStatus OutStatus;
590 afs_size_t base, bytes, length;
592 unsigned int first = 0;
594 struct rx_connection *rxconn;
596 for (bytes = 0, j = 0; !code && j <= high; j++) {
598 ObtainSharedLock(&(dcList[j]->lock), 629);
601 bytes += dcList[j]->f.chunkBytes;
602 if ((dcList[j]->f.chunkBytes < afs_OtherCSize)
603 && (dcList[j]->f.chunk - minj < high)
605 int sbytes = afs_OtherCSize - dcList[j]->f.chunkBytes;
609 if (bytes && (j == high || !dcList[j + 1])) {
611 struct dcache **dclist = &dcList[first];
612 /* base = AFS_CHUNKTOBASE(dcList[first]->f.chunk); */
613 base = AFS_CHUNKTOBASE(first + minj);
616 * take a list of dcache structs and send them all off to the server
617 * the list must be in order, and the chunks contiguous.
618 * Note - there is no locking done by this code currently. For
619 * safety's sake, xdcache could be locked over the entire call.
620 * However, that pretty well ties up all the threads. Meantime, all
621 * the chunks _MUST_ have their refcounts bumped.
622 * The writes done before a store back will clear setuid-ness
624 * We can permit CacheStoreProc to wake up the user process IFF we
625 * are doing the last RPC for this close, ie, storing back the last
626 * set of contiguous chunks of a file.
629 nchunks = 1 + j - first;
630 nomore = !(moredata || (j != high));
631 length = lmin(avc->f.m.Length, avc->f.truncPos);
632 afs_Trace4(afs_iclSetp, CM_TRACE_STOREDATA64,
633 ICL_TYPE_FID, &avc->f.fid.Fid, ICL_TYPE_OFFSET,
634 ICL_HANDLE_OFFSET(base), ICL_TYPE_OFFSET,
635 ICL_HANDLE_OFFSET(bytes), ICL_TYPE_OFFSET,
636 ICL_HANDLE_OFFSET(length));
639 tc = afs_Conn(&avc->f.fid, areq, 0, &rxconn);
641 #ifdef AFS_64BIT_CLIENT
644 code = rxfs_storeInit(avc, tc, rxconn, base, bytes, length,
647 code = afs_CacheStoreDCaches(avc, dclist, bytes, anewDV,
648 &doProcessFS, &OutStatus,
649 nchunks, nomore, ops, rock);
652 #ifdef AFS_64BIT_CLIENT
653 if (code == RXGEN_OPCODE && !afs_serverHasNo64Bit(tc)) {
654 afs_serverSetNo64Bit(tc);
657 #endif /* AFS_64BIT_CLIENT */
659 (tc, rxconn, code, &avc->f.fid, areq,
660 AFS_STATS_FS_RPCIDX_STOREDATA, SHARED_LOCK,
663 /* put back all remaining locked dcache entries */
664 for (i = 0; i < nchunks; i++) {
665 struct dcache *tdc = dclist[i];
667 if (afs_indexFlags[tdc->index] & IFDataMod) {
669 * LOCKXXX -- should hold afs_xdcache(W) when
670 * modifying afs_indexFlags.
672 afs_indexFlags[tdc->index] &= ~IFDataMod;
673 afs_stats_cmperf.cacheCurrDirtyChunks--;
674 afs_indexFlags[tdc->index] &= ~IFDirtyPages;
675 if (sync & AFS_VMSYNC_INVAL) {
676 /* since we have invalidated all the pages of this
677 ** vnode by calling osi_VM_TryToSmush, we can
678 ** safely mark this dcache entry as not having
679 ** any pages. This vnode now becomes eligible for
680 ** reclamation by getDownD.
682 afs_indexFlags[tdc->index] &= ~IFAnyPages;
686 UpgradeSToWLock(&tdc->lock, 628);
687 tdc->f.states &= ~DWriting; /* correct? */
688 tdc->dflags |= DFEntryMod;
689 ReleaseWriteLock(&tdc->lock);
691 /* Mark the entry as released */
696 /* Now copy out return params */
697 UpgradeSToWLock(&avc->lock, 28); /* keep out others for a while */
698 afs_ProcessFS(avc, &OutStatus, areq);
699 /* Keep last (max) size of file on server to see if
700 * we need to call afs_StoreMini to extend the file.
703 *amaxStoredLength = OutStatus.Length;
704 ConvertWToSLock(&avc->lock);
709 for (j++; j <= high; j++) {
711 ReleaseSharedLock(&(dcList[j]->lock));
712 afs_PutDCache(dcList[j]);
713 /* Releasing entry */
719 afs_Trace2(afs_iclSetp, CM_TRACE_STOREALLDCDONE,
720 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code);
728 /* rock and operations for RX_FILESERVER */
730 struct rxfs_fetchVariables {
731 struct rx_call *call;
735 afs_int32 hasNo64bit;
741 rxfs_fetchUfsRead(void *r, afs_uint32 size, afs_uint32 *bytesread)
745 struct rxfs_fetchVariables *v = (struct rxfs_fetchVariables *)r;
748 tlen = (size > AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ : size);
750 code = rx_Read(v->call, v->tbuffer, tlen);
759 rxfs_fetchMemRead(void *r, afs_uint32 tlen, afs_uint32 *bytesread)
762 struct rxfs_fetchVariables *v = (struct rxfs_fetchVariables *)r;
766 code = rx_Readv(v->call, v->iov, &v->nio, RX_MAXIOVECS, tlen);
776 rxfs_fetchMemWrite(void *r, struct osi_file *fP, afs_uint32 offset,
777 afs_uint32 tlen, afs_uint32 *byteswritten)
780 struct rxfs_fetchVariables *v = (struct rxfs_fetchVariables *)r;
781 struct memCacheEntry *mceP = (struct memCacheEntry *)fP;
783 code = afs_MemWritevBlk(mceP, offset, v->iov, v->nio, tlen);
787 *byteswritten = code;
792 rxfs_fetchUfsWrite(void *r, struct osi_file *fP, afs_uint32 offset,
793 afs_uint32 tlen, afs_uint32 *byteswritten)
796 struct rxfs_fetchVariables *v = (struct rxfs_fetchVariables *)r;
798 code = afs_osi_Write(fP, -1, v->tbuffer, tlen);
802 *byteswritten = code;
808 rxfs_fetchClose(void *r, struct vcache *avc, struct dcache * adc,
809 struct afs_FetchOutput *o)
812 struct rxfs_fetchVariables *v = (struct rxfs_fetchVariables *)r;
818 #ifdef AFS_64BIT_CLIENT
820 code = EndRXAFS_FetchData64(v->call, &o->OutStatus, &o->CallBack,
824 code = EndRXAFS_FetchData(v->call, &o->OutStatus, &o->CallBack,
826 code = rx_EndCall(v->call, code);
835 rxfs_fetchDestroy(void **r, afs_int32 code)
837 struct rxfs_fetchVariables *v = (struct rxfs_fetchVariables *)*r;
842 code = rx_EndCall(v->call, code);
846 osi_FreeLargeSpace(v->tbuffer);
848 osi_FreeSmallSpace(v->iov);
849 osi_FreeSmallSpace(v);
854 rxfs_fetchMore(void *r, afs_int32 *length, afs_uint32 *moredata)
857 struct rxfs_fetchVariables *v = (struct rxfs_fetchVariables *)r;
860 * The fetch protocol is extended for the AFS/DFS translator
861 * to allow multiple blocks of data, each with its own length,
862 * to be returned. As long as the top bit is set, there are more
865 * We do not do this for AFS file servers because they sometimes
866 * return large negative numbers as the transfer size.
870 code = rx_Read(v->call, (void *)length, sizeof(afs_int32));
872 *length = ntohl(*length);
873 if (code != sizeof(afs_int32)) {
874 code = rx_Error(v->call);
876 return (code ? code : -1); /* try to return code, not -1 */
879 *moredata = *length & 0x80000000;
880 *length &= ~0x80000000;
885 struct fetchOps rxfs_fetchUfsOps = {
894 struct fetchOps rxfs_fetchMemOps = {
903 rxfs_fetchInit(struct afs_conn *tc, struct rx_connection *rxconn,
904 struct vcache *avc, afs_offs_t base,
905 afs_uint32 size, afs_int32 *alength, struct dcache *adc,
906 struct osi_file *fP, struct fetchOps **ops, void **rock)
908 struct rxfs_fetchVariables *v;
910 #ifdef AFS_64BIT_CLIENT
911 afs_uint32 length_hi = 0;
913 afs_uint32 length = 0, bytes;
915 v = (struct rxfs_fetchVariables *)
916 osi_AllocSmallSpace(sizeof(struct rxfs_fetchVariables));
918 osi_Panic("rxfs_fetchInit: osi_AllocSmallSpace returned NULL\n");
919 memset(v, 0, sizeof(struct rxfs_fetchVariables));
922 v->call = rx_NewCall(rxconn);
925 #ifdef AFS_64BIT_CLIENT
926 afs_size_t length64; /* as returned from server */
927 if (!afs_serverHasNo64Bit(tc)) {
928 afs_uint64 llbytes = size;
930 code = StartRXAFS_FetchData64(v->call,
931 (struct AFSFid *) &avc->f.fid.Fid,
935 afs_Trace2(afs_iclSetp, CM_TRACE_FETCH64CODE,
936 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code);
938 bytes = rx_Read(v->call, (char *)&length_hi, sizeof(afs_int32));
940 if (bytes == sizeof(afs_int32)) {
941 length_hi = ntohl(length_hi);
944 code = rx_EndCall(v->call, RX_PROTOCOL_ERROR);
950 if (code == RXGEN_OPCODE || afs_serverHasNo64Bit(tc)) {
951 if (base > 0x7FFFFFFF) {
958 v->call = rx_NewCall(rxconn);
960 StartRXAFS_FetchData(
961 v->call, (struct AFSFid*)&avc->f.fid.Fid,
965 afs_serverSetNo64Bit(tc);
970 bytes = rx_Read(v->call, (char *)&length, sizeof(afs_int32));
972 if (bytes == sizeof(afs_int32))
973 length = ntohl(length);
976 code = rx_EndCall(v->call, RX_PROTOCOL_ERROR);
982 FillInt64(length64, length_hi, length);
985 /* Check if the fileserver said our length is bigger than can fit
986 * in a signed 32-bit integer. If it is, we can't handle that, so
988 if (length64 > MAX_AFS_INT32) {
990 code = rx_EndCall(v->call, RX_PROTOCOL_ERROR);
994 code = code != 0 ? code : EIO;
999 /* Check if the fileserver said our length was negative. If it
1000 * is, just treat it as a 0 length, since some older fileservers
1001 * returned negative numbers when they meant to return 0. Note
1002 * that we must do this in this 64-bit-specific block, since
1003 * length64 being negative will screw up our conversion to the
1004 * 32-bit 'alength' below. */
1006 length_hi = length = 0;
1007 FillInt64(length64, 0, 0);
1011 afs_Trace3(afs_iclSetp, CM_TRACE_FETCH64LENG,
1012 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code,
1014 ICL_HANDLE_OFFSET(length64));
1017 #else /* AFS_64BIT_CLIENT */
1019 code = StartRXAFS_FetchData(v->call, (struct AFSFid *)&avc->f.fid.Fid,
1025 rx_Read(v->call, (char *)&length, sizeof(afs_int32));
1027 if (bytes == sizeof(afs_int32)) {
1028 *alength = ntohl(length);
1030 /* Older fileservers can return a negative length when they
1031 * meant to return 0; just assume negative lengths were
1032 * meant to be 0 lengths. */
1036 code = rx_EndCall(v->call, RX_PROTOCOL_ERROR);
1040 #endif /* AFS_64BIT_CLIENT */
1044 /* We need to cast here, in order to avoid issues if *alength is
1045 * negative. Some, older, fileservers can return a negative length,
1046 * which the rest of the code deals correctly with. */
1047 if (code == 0 && *alength > (afs_int32) size) {
1048 /* The fileserver told us it is going to send more data than we
1049 * requested. It shouldn't do that, and accepting that much data
1050 * can make us take up more cache space than we're supposed to,
1053 code = rx_EndCall(v->call, RX_PROTOCOL_ERROR);
1060 osi_FreeSmallSpace(v);
1063 if (cacheDiskType == AFS_FCACHE_TYPE_UFS) {
1064 v->tbuffer = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
1066 osi_Panic("rxfs_fetchInit: osi_AllocLargeSpace for iovecs returned NULL\n");
1067 osi_Assert(WriteLocked(&adc->lock));
1069 *ops = (struct fetchOps *) &rxfs_fetchUfsOps;
1072 afs_Trace4(afs_iclSetp, CM_TRACE_MEMFETCH, ICL_TYPE_POINTER, avc,
1073 ICL_TYPE_POINTER, fP, ICL_TYPE_OFFSET,
1074 ICL_HANDLE_OFFSET(base), ICL_TYPE_INT32, length);
1076 * We need to alloc the iovecs on the heap so that they are "pinned"
1077 * rather than declare them on the stack - defect 11272
1079 v->iov = osi_AllocSmallSpace(sizeof(struct iovec) * RX_MAXIOVECS);
1081 osi_Panic("rxfs_fetchInit: osi_AllocSmallSpace for iovecs returned NULL\n");
1082 *ops = (struct fetchOps *) &rxfs_fetchMemOps;
1090 * Routine called on fetch; also tells people waiting for data
1091 * that more has arrived.
1093 * \param tc Ptr to the AFS connection structure.
1094 * \param rxconn Ptr to the Rx connection structure.
1095 * \param fP File descriptor for the cache file.
1096 * \param base Base offset to fetch.
1097 * \param adc Ptr to the dcache entry for the file, write-locked.
1098 * \param avc Ptr to the vcache entry for the file.
1099 * \param size Amount of data that should be fetched.
1100 * \param tsmall Ptr to the afs_FetchOutput structure.
1102 * \note Environment: Nothing interesting.
1105 afs_CacheFetchProc(struct afs_conn *tc, struct rx_connection *rxconn,
1106 struct osi_file *fP, afs_size_t base,
1107 struct dcache *adc, struct vcache *avc, afs_int32 size,
1108 struct afs_FetchOutput *tsmall)
1112 afs_uint32 bytesread, byteswritten;
1113 struct fetchOps *ops = NULL;
1115 afs_uint32 moredata = 0;
1120 osi_timeval_t xferStartTime; /*FS xfer start time */
1121 afs_size_t bytesToXfer = 0, bytesXferred = 0;
1124 AFS_STATCNT(CacheFetchProc);
1126 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHDATA);
1130 * avc->lock(R) if setLocks && !slowPass
1131 * avc->lock(W) if !setLocks || slowPass
1134 code = rxfs_fetchInit(
1135 tc, rxconn, avc, base, size, &length, adc, fP, &ops, &rock);
1138 osi_GetuTime(&xferStartTime);
1139 #endif /* AFS_NOSTATS */
1141 adc->validPos = base;
1144 if (avc->f.states & CForeign) {
1145 code = (*ops->more)(rock, &length, &moredata);
1150 bytesToXfer += length;
1151 #endif /* AFS_NOSTATS */
1152 while (length > 0) {
1153 #ifdef RX_KERNEL_TRACE
1154 afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
1157 code = (*ops->read)(rock, length, &bytesread);
1158 #ifdef RX_KERNEL_TRACE
1159 afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
1163 bytesXferred += bytesread;
1164 #endif /* AFS_NOSTATS */
1166 afs_Trace3(afs_iclSetp, CM_TRACE_FETCH64READ,
1167 ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code,
1168 ICL_TYPE_INT32, length);
1172 code = (*ops->write)(rock, fP, offset, bytesread, &byteswritten);
1175 offset += bytesread;
1177 length -= bytesread;
1178 adc->validPos = base;
1179 if (afs_osi_Wakeup(&adc->validPos) == 0)
1180 afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAKE, ICL_TYPE_STRING,
1181 __FILE__, ICL_TYPE_INT32, __LINE__,
1182 ICL_TYPE_POINTER, adc, ICL_TYPE_INT32,
1188 code = (*ops->close)(rock, avc, adc, tsmall);
1190 code = (*ops->destroy)(&rock, code);
1193 FillStoreStats(code, AFS_STATS_FS_XFERIDX_FETCHDATA, xferStartTime,
1194 bytesToXfer, bytesXferred);