/*
- * For copyright information, see IPL which you accepted in order to
- * download this software.
+ * Copyright 2000, International Business Machines Corporation and others.
+ * All Rights Reserved.
*
- * Copyright (C) 1995, 1990 Transarc Corporation
+ * This software has been released under the terms of the IBM Public
+ * License. For details, see the LICENSE file in the top-level source
+ * directory or online at http://www.openafs.org/dl/license10.html
*/
/*
* --------------------- Required definitions ---------------------
*/
-#include "../afs/param.h" /*Should be always first*/
-#include "../afs/sysincludes.h" /*Standard vendor system headers*/
-#include "../afs/afsincludes.h" /*AFS-based standard headers*/
-#include "../afs/afs_stats.h" /* statistics */
-#include "../afs/afs_cbqueue.h"
-#include "../afs/afs_osidnlc.h"
+#include <afsconfig.h>
+#include "afs/param.h"
+#include "afs/sysincludes.h" /*Standard vendor system headers */
+#include "afsincludes.h" /*AFS-based standard headers */
+#include "afs/afs_stats.h" /* statistics */
+#include "afs/afs_cbqueue.h"
+#include "afs/afs_osidnlc.h"
-/* Imported variables */
-extern afs_rwlock_t afs_xserver;
-extern afs_rwlock_t afs_xdcache;
-extern afs_rwlock_t afs_xcbhash;
-extern afs_lock_t afs_ftf;
-extern struct server *afs_servers[NSERVERS];
-extern afs_int32 afs_dhashsize;
-extern afs_int32 *afs_dvhashTbl;
-extern unsigned char *afs_indexFlags; /*(only one) Is there data there?*/
-extern int cacheDiskType;
-
-afs_uint32 afs_stampValue=0;
+afs_uint32 afs_stampValue = 0;
/*
* afs_StoreMini
* We're write-locked upon entry.
*/
-int afs_StoreMini(avc, areq)
- register struct vcache *avc;
- struct vrequest *areq;
-
-{ /*afs_StoreMini*/
- register struct conn *tc;
+static int
+afs_StoreMini(struct vcache *avc, struct vrequest *areq)
+{
+ struct afs_conn *tc;
struct AFSStoreStatus InStatus;
struct AFSFetchStatus OutStatus;
struct AFSVolSync tsync;
- register afs_int32 code;
- register struct rx_call *tcall;
- afs_int32 tlen;
- XSTATS_DECLS
-
+ afs_int32 code;
+ struct rx_call *tcall;
+ struct rx_connection *rxconn;
+ afs_size_t tlen, xlen = 0;
+ XSTATS_DECLS;
AFS_STATCNT(afs_StoreMini);
afs_Trace2(afs_iclSetp, CM_TRACE_STOREMINI, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->m.Length);
- tlen = avc->m.Length;
- if (avc->truncPos < tlen) tlen = avc->truncPos;
- avc->truncPos = AFS_NOTRUNC;
- avc->states &= ~CExtendedFile;
+ ICL_TYPE_INT32, avc->f.m.Length);
+ tlen = avc->f.m.Length;
+ if (avc->f.truncPos < tlen)
+ tlen = avc->f.truncPos;
+ avc->f.truncPos = AFS_NOTRUNC;
+ avc->f.states &= ~CExtendedFile;
+ memset(&InStatus, 0, sizeof(InStatus));
do {
- tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
+ tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK, &rxconn);
if (tc) {
-#ifdef RX_ENABLE_LOCKS
- AFS_GUNLOCK();
-#endif /* RX_ENABLE_LOCKS */
- tcall = rx_NewCall(tc->id);
-#ifdef RX_ENABLE_LOCKS
- AFS_GLOCK();
-#endif /* RX_ENABLE_LOCKS */
+#ifdef AFS_64BIT_CLIENT
+ retry:
+#endif
+ RX_AFS_GUNLOCK();
+ tcall = rx_NewCall(rxconn);
+ RX_AFS_GLOCK();
/* Set the client mod time since we always want the file
- * to have the client's mod time and not the server's one
- * (to avoid problems with make, etc.) It almost always
- * works fine with standard afs because them server/client
- * times are in sync and more importantly this storemini
- * it's a special call that would typically be followed by
- * the proper store-data or store-status calls.
- */
+ * to have the client's mod time and not the server's one
+ * (to avoid problems with make, etc.) It almost always
+ * works fine with standard afs because them server/client
+ * times are in sync and more importantly this storemini
+ * it's a special call that would typically be followed by
+ * the proper store-data or store-status calls.
+ */
InStatus.Mask = AFS_SETMODTIME;
- InStatus.ClientModTime = avc->m.Date;
+ InStatus.ClientModTime = avc->f.m.Date;
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STOREDATA);
-#ifdef RX_ENABLE_LOCKS
- AFS_GUNLOCK();
-#endif /* RX_ENABLE_LOCKS */
- code = StartRXAFS_StoreData(tcall,
- (struct AFSFid *)&avc->fid.Fid,
- &InStatus, avc->m.Length, 0, tlen);
+ afs_Trace4(afs_iclSetp, CM_TRACE_STOREDATA64, ICL_TYPE_FID,
+ &avc->f.fid.Fid, ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(avc->f.m.Length), ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(xlen), ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(tlen));
+ RX_AFS_GUNLOCK();
+#ifdef AFS_64BIT_CLIENT
+ if (!afs_serverHasNo64Bit(tc)) {
+ code =
+ StartRXAFS_StoreData64(tcall,
+ (struct AFSFid *)&avc->f.fid.Fid,
+ &InStatus, avc->f.m.Length,
+ (afs_size_t) 0, tlen);
+ } else {
+ afs_int32 l1, l2;
+ l1 = avc->f.m.Length;
+ l2 = tlen;
+ if ((avc->f.m.Length > 0x7fffffff) ||
+ (tlen > 0x7fffffff) ||
+ ((0x7fffffff - tlen) < avc->f.m.Length)) {
+ code = EFBIG;
+ goto error;
+ }
+ code =
+ StartRXAFS_StoreData(tcall,
+ (struct AFSFid *)&avc->f.fid.Fid,
+ &InStatus, l1, 0, l2);
+ }
+#else /* AFS_64BIT_CLIENT */
+ code =
+ StartRXAFS_StoreData(tcall, (struct AFSFid *)&avc->f.fid.Fid,
+ &InStatus, avc->f.m.Length, 0, tlen);
+#endif /* AFS_64BIT_CLIENT */
if (code == 0) {
code = EndRXAFS_StoreData(tcall, &OutStatus, &tsync);
}
+#ifdef AFS_64BIT_CLIENT
+ error:
+#endif
code = rx_EndCall(tcall, code);
-#ifdef RX_ENABLE_LOCKS
- AFS_GLOCK();
-#endif /* RX_ENABLE_LOCKS */
+ RX_AFS_GLOCK();
XSTATS_END_TIME;
- }
- else code = -1;
- } while
- (afs_Analyze(tc, code, &avc->fid, areq,
- AFS_STATS_FS_RPCIDX_STOREDATA,
- SHARED_LOCK, (struct cell *)0));
-
- if (code == 0) {
+#ifdef AFS_64BIT_CLIENT
+ if (code == RXGEN_OPCODE && !afs_serverHasNo64Bit(tc)) {
+ afs_serverSetNo64Bit(tc);
+ goto retry;
+ }
+#endif /* AFS_64BIT_CLIENT */
+ } else
+ code = -1;
+ } while (afs_Analyze
+ (tc, rxconn, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STOREDATA,
+ SHARED_LOCK, NULL));
+
+ if (code == 0)
afs_ProcessFS(avc, &OutStatus, areq);
- }
- else {
- /* blew it away */
- afs_InvalidateAllSegments(avc, 1);
- }
- return code;
-} /*afs_StoreMini*/
+ return code;
+} /*afs_StoreMini */
-unsigned int storeallmissing = 0;
-#define lmin(a,b) (((a) < (b)) ? (a) : (b))
/*
* afs_StoreAllSegments
*
* Environment:
* Called with avc write-locked.
*/
-#if defined (AFS_HPUX_ENV) || defined(AFS_ULTRIX_ENV)
+#if defined (AFS_HPUX_ENV)
int NCHUNKSATONCE = 3;
#else
-int NCHUNKSATONCE = 64 ;
+int NCHUNKSATONCE = 64;
#endif
-int afs_dvhack=0;
+int afs_dvhack = 0;
-afs_StoreAllSegments(avc, areq, sync)
- register struct vcache *avc;
- struct vrequest *areq;
- int sync;
-
-{ /*afs_StoreAllSegments*/
- register struct dcache *tdc;
- register afs_int32 code=0;
- register afs_int32 index;
- register afs_int32 origCBs, foreign=0;
- int hash, stored;
+int
+afs_StoreAllSegments(struct vcache *avc, struct vrequest *areq,
+ int sync)
+{
+ struct dcache *tdc;
+ afs_int32 code = 0;
+ afs_int32 index;
+ afs_int32 origCBs, foreign = 0;
+ int hash;
afs_hyper_t newDV, oldDV; /* DV when we start, and finish, respectively */
- struct dcache **dcList, **dclist;
- unsigned int i, j, minj, maxj, moredata, high, off;
- unsigned long tlen;
- int safety;
- int maxStoredLength; /* highest offset we've written to server. */
-#ifndef AFS_NOSTATS
- struct afs_stats_xferData *xferP; /* Ptr to this op's xfer struct */
- osi_timeval_t xferStartTime, /*FS xfer start time*/
- xferStopTime; /*FS xfer stop time*/
- afs_int32 bytesToXfer; /* # bytes to xfer*/
- afs_int32 bytesXferred; /* # bytes actually xferred*/
-#endif /* AFS_NOSTATS */
-
+ struct dcache **dcList;
+ unsigned int i, j, minj, moredata, high, off;
+ afs_size_t maxStoredLength; /* highest offset we've written to server. */
+ int safety, marineronce = 0;
AFS_STATCNT(afs_StoreAllSegments);
-
- hset(oldDV, avc->m.DataVersion);
- hset(newDV, avc->m.DataVersion);
- hash = DVHash(&avc->fid);
- foreign = (avc->states & CForeign);
- dcList = (struct dcache **) osi_AllocLargeSpace(AFS_LRALLOCSIZ);
+
+ hash = DVHash(&avc->f.fid);
+ foreign = (avc->f.states & CForeign);
+ dcList = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
afs_Trace2(afs_iclSetp, CM_TRACE_STOREALL, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->m.Length);
-#ifndef AFS_AIX32_ENV
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
+#if !defined(AFS_AIX32_ENV) && !defined(AFS_SGI65_ENV)
/* In the aix vm implementation we need to do the vm_writep even
* on the memcache case since that's we adjust the file's size
* and finish flushing partial vm pages.
*/
- if (cacheDiskType != AFS_FCACHE_TYPE_MEM)
-#endif /* AFS_AIX32_ENV */
+ if ((cacheDiskType != AFS_FCACHE_TYPE_MEM) ||
+ (sync & AFS_VMSYNC_INVAL) || (sync & AFS_VMSYNC) ||
+ (sync & AFS_LASTSTORE))
+#endif /* !AFS_AIX32_ENV && !AFS_SGI65_ENV */
{
/* If we're not diskless, reading a file may stress the VM
* system enough to cause a pageout, and this vnode would be
* space.
*/
#if defined(AFS_SUN5_ENV)
- if ( sync & AFS_VMSYNC_INVAL) /* invalidate VM pages */
- osi_VM_TryToSmush(avc, CRED() , 1 );
+ if (sync & AFS_VMSYNC_INVAL) /* invalidate VM pages */
+ osi_VM_TryToSmush(avc, CRED(), 1);
else
#endif
osi_VM_StoreAllSegments(avc);
}
+ if (AFS_IS_DISCONNECTED && !AFS_IN_SYNC) {
+ /* This will probably make someone sad ... */
+ /*printf("Net down in afs_StoreSegments\n");*/
+ return ENETDOWN;
+ }
+
+ /*
+ * Can't do this earlier because osi_VM_StoreAllSegments drops locks
+ * and can indirectly do some stores that increase the DV.
+ */
+ hset(oldDV, avc->f.m.DataVersion);
+ hset(newDV, avc->f.m.DataVersion);
ConvertWToSLock(&avc->lock);
-
- /*
- * Subsequent code expects a sorted list, and it expects all the
- * chunks in the list to be contiguous, so we need a sort and a
- * while loop in here, too - but this will work for a first pass...
- * 92.10.05 - OK, there's a sort in here now. It's kind of a modified
- * bin sort, I guess. Chunk numbers start with 0
- *
- * - Have to get a write lock on xdcache because GetDSlot might need it (if
- * the chunk doesn't have a dcache struct).
- * This seems like overkill in most cases.
- * - I'm not sure that it's safe to do "index = .hvNextp", then unlock
- * xdcache, then relock xdcache and try to use index. It is done
- * a lot elsewhere in the CM, but I'm not buying that argument.
- * - should be able to check IFDataMod without doing the GetDSlot (just
- * hold afs_xdcache). That way, it's easy to do this without the
- * writelock on afs_xdcache, and we save unneccessary disk
- * operations. I don't think that works, 'cuz the next pointers
- * are still on disk.
- */
+
+ /*
+ * Subsequent code expects a sorted list, and it expects all the
+ * chunks in the list to be contiguous, so we need a sort and a
+ * while loop in here, too - but this will work for a first pass...
+ * 92.10.05 - OK, there's a sort in here now. It's kind of a modified
+ * bin sort, I guess. Chunk numbers start with 0
+ *
+ * - Have to get a write lock on xdcache because GetDSlot might need it (if
+ * the chunk doesn't have a dcache struct).
+ * This seems like overkill in most cases.
+ * - I'm not sure that it's safe to do "index = .hvNextp", then unlock
+ * xdcache, then relock xdcache and try to use index. It is done
+ * a lot elsewhere in the CM, but I'm not buying that argument.
+ * - should be able to check IFDataMod without doing the GetDSlot (just
+ * hold afs_xdcache). That way, it's easy to do this without the
+ * writelock on afs_xdcache, and we save unneccessary disk
+ * operations. I don't think that works, 'cuz the next pointers
+ * are still on disk.
+ */
origCBs = afs_allCBs;
- retry:
maxStoredLength = 0;
- tlen = avc->m.Length;
- minj = 0 ;
+ minj = 0;
do {
- bzero ((char *)dcList, NCHUNKSATONCE * sizeof(struct dcache *));
- high = 0;
- moredata = FALSE;
-
- /* lock and start over from beginning of hash chain
- * in order to avoid a race condition. */
- MObtainWriteLock(&afs_xdcache,284);
- index = afs_dvhashTbl[hash];
-
- for(j=0; index != NULLIDX;) {
- if ((afs_indexFlags[index] & IFDataMod) &&
- (afs_indexUnique[index] == avc->fid.Fid.Unique)) {
- tdc = afs_GetDSlot(index, 0); /* refcount+1. */
- if (!FidCmp( &tdc->f.fid, &avc->fid ) && tdc->f.chunk >= minj ) {
-
- off = tdc->f.chunk - minj;
- if (off < NCHUNKSATONCE) {
- if ( dcList[ off ] )
- osi_Panic("dclist slot already in use!");
- dcList[ off ] = tdc;
- if (off > high)
- high = off;
- tlen -= tdc->f.chunkBytes; /* shortcut: big win for little files */
- j++;
- if (tlen <= 0)
- break;
+ memset(dcList, 0, NCHUNKSATONCE * sizeof(struct dcache *));
+ high = 0;
+ moredata = FALSE;
+
+ /* lock and start over from beginning of hash chain
+ * in order to avoid a race condition. */
+ ObtainWriteLock(&afs_xdcache, 284);
+ index = afs_dvhashTbl[hash];
+
+ for (j = 0; index != NULLIDX;) {
+ if ((afs_indexFlags[index] & IFDataMod)
+ && (afs_indexUnique[index] == avc->f.fid.Fid.Unique)) {
+ tdc = afs_GetValidDSlot(index); /* refcount+1. */
+ if (!tdc) {
+ ReleaseWriteLock(&afs_xdcache);
+ code = EIO;
+ goto done;
+ }
+ ReleaseReadLock(&tdc->tlock);
+ if (!FidCmp(&tdc->f.fid, &avc->f.fid) && tdc->f.chunk >= minj) {
+ off = tdc->f.chunk - minj;
+ if (off < NCHUNKSATONCE) {
+ if (dcList[off])
+ osi_Panic("dclist slot already in use!");
+ if (afs_mariner && !marineronce) {
+ /* first chunk only */
+ afs_MarinerLog("store$Storing", avc);
+ marineronce++;
+ }
+ dcList[off] = tdc;
+ if (off > high)
+ high = off;
+ j++;
+ /* DCLOCKXXX: chunkBytes is protected by tdc->lock which we
+ * can't grab here, due to lock ordering with afs_xdcache.
+ * So, disable this shortcut for now. -- kolya 2001-10-13
+ */
+ /* shortcut: big win for little files */
+ /* tlen -= tdc->f.chunkBytes;
+ * if (tlen <= 0)
+ * break;
+ */
+ } else {
+ moredata = TRUE;
+ afs_PutDCache(tdc);
+ if (j == NCHUNKSATONCE)
+ break;
+ }
+ } else {
+ afs_PutDCache(tdc);
+ }
}
- else {
- moredata = TRUE;
- lockedPutDCache(tdc);
- if (j == NCHUNKSATONCE)
- break;
+ index = afs_dvnextTbl[index];
+ }
+ ReleaseWriteLock(&afs_xdcache);
+
+ /* this guy writes chunks, puts back dcache structs, and bumps newDV */
+ /* "moredata" just says "there are more dirty chunks yet to come".
+ */
+ if (j) {
+ code =
+ afs_CacheStoreVCache(dcList, avc, areq, sync,
+ minj, high, moredata,
+ &newDV, &maxStoredLength);
+ /* Release any zero-length dcache entries in our interval
+ * that we locked but didn't store back above.
+ */
+ for (j = 0; j <= high; j++) {
+ tdc = dcList[j];
+ if (tdc) {
+ osi_Assert(tdc->f.chunkBytes == 0);
+ ReleaseSharedLock(&tdc->lock);
+ afs_PutDCache(tdc);
+ }
}
- } else {
- lockedPutDCache(tdc);
- }
}
- index = afs_dvnextTbl[index];
- }
-
- MReleaseWriteLock(&afs_xdcache);
- /* this guy writes chunks, puts back dcache structs, and bumps newDV */
- /* "moredata" just says "there are more dirty chunks yet to come".
- */
- if (j) {
- static afs_uint32 lp1 = 10000, lp2 = 10000;
- struct AFSStoreStatus InStatus;
- afs_uint32 base, bytes, nchunks;
- int nomore;
- unsigned int first;
- int *shouldwake;
- struct conn * tc;
- struct osi_file * tfile;
- struct rx_call * tcall;
- extern int afs_defaultAsynchrony;
- XSTATS_DECLS
-
- for (bytes = 0, j = 0; !code && j<=high; j++) {
- if (dcList[j]) {
- if (!bytes)
- first = j;
- bytes += dcList[j]->f.chunkBytes;
- if ((dcList[j]->f.chunkBytes < afs_OtherCSize)
- && (dcList[j]->f.chunk - minj < high)
- && dcList[j+1]) {
- int sbytes = afs_OtherCSize - dcList[j]->f.chunkBytes;
- bytes += sbytes;
+ /* if (j) */
+ minj += NCHUNKSATONCE;
+ } while (!code && moredata);
+ done:
+ UpgradeSToWLock(&avc->lock, 29);
+ /* send a trivial truncation store if did nothing else */
+ if (code == 0) {
+ /*
+ * Call StoreMini if we haven't written enough data to extend the
+ * file at the fileserver to the client's notion of the file length.
+ */
+ if ((avc->f.truncPos != AFS_NOTRUNC)
+ || ((avc->f.states & CExtendedFile)
+ && (maxStoredLength < avc->f.m.Length))) {
+ code = afs_StoreMini(avc, areq);
+ if (code == 0)
+ hadd32(newDV, 1); /* just bumped here, too */
+ }
+ avc->f.states &= ~CExtendedFile;
+ }
- }
- }
- if (bytes && (j==high || !dcList[j+1])) {
- /* base = AFS_CHUNKTOBASE(dcList[first]->f.chunk); */
- base = AFS_CHUNKTOBASE(first + minj) ;
- /*
- *
- * take a list of dcache structs and send them all off to the server
- * the list must be in order, and the chunks contiguous.
- * Note - there is no locking done by this code currently. For
- * safety's sake, xdcache could be locked over the entire call.
- * However, that pretty well ties up all the threads. Meantime, all
- * the chunks _MUST_ have their refcounts bumped.
- * The writes done before a store back will clear setuid-ness
- * in cache file.
- * We can permit CacheStoreProc to wake up the user process IFF we
- * are doing the last RPC for this close, ie, storing back the last
- * set of contiguous chunks of a file.
- */
+ /*
+ * Finally, turn off DWriting, turn on DFEntryMod,
+ * update f.versionNo.
+ * A lot of this could be integrated into the loop above
+ */
+ if (!code) {
+ afs_hyper_t h_unset;
+ hones(h_unset);
- dclist = &dcList[first];
- nchunks = 1+j-first;
- nomore = !(moredata || (j!=high));
- InStatus.ClientModTime = avc->m.Date;
- InStatus.Mask = AFS_SETMODTIME;
- if (sync & AFS_SYNC) {
- InStatus.Mask |= AFS_FSYNC;
- }
- tlen = lmin(avc->m.Length, avc->truncPos);
-
- do {
- stored = 0;
- tc = afs_Conn(&avc->fid, areq);
- if (tc) {
-#ifdef RX_ENABLE_LOCKS
- AFS_GUNLOCK();
-#endif /* RX_ENABLE_LOCKS */
- tcall = rx_NewCall(tc->id);
- code = StartRXAFS_StoreData(tcall, (struct AFSFid *) &avc->fid.Fid,
- &InStatus, base, bytes, tlen);
-#ifdef RX_ENABLE_LOCKS
- AFS_GLOCK();
-#endif /* RX_ENABLE_LOCKS */
- } else {
- code = -1;
- tcall = NULL;
- }
- if (!code) {
- XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STOREDATA);
- avc->truncPos = AFS_NOTRUNC;
- }
- for (i = 0; i<nchunks && !code;i++) {
- tdc = dclist[i];
+ minj = 0;
+
+ do {
+ moredata = FALSE;
+ memset(dcList, 0,
+ NCHUNKSATONCE * sizeof(struct dcache *));
+
+ /* overkill, but it gets the lock in case GetDSlot needs it */
+ ObtainWriteLock(&afs_xdcache, 285);
+
+ for (j = 0, safety = 0, index = afs_dvhashTbl[hash];
+ index != NULLIDX && safety < afs_cacheFiles + 2;
+ index = afs_dvnextTbl[index]) {
+
+ if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
+ tdc = afs_GetValidDSlot(index);
if (!tdc) {
- afs_warn("afs: missing dcache!\n");
- storeallmissing++;
- continue; /* panic? */
+ /* This is okay; since manipulating the dcaches at this
+ * point is best-effort. We only get a dcache here to
+ * increment the dv and turn off DWriting. If we were
+ * supposed to do that for a dcache, but could not
+ * due to an I/O error, it just means the dv won't
+ * be updated so we don't be able to use that cached
+ * chunk in the future. That's inefficient, but not
+ * an error. */
+ continue;
}
- shouldwake = 0;
- if (nomore) {
- if (avc->asynchrony == -1) {
- if (afs_defaultAsynchrony > (bytes-stored)) {
- shouldwake = &nomore;
- }
- } else if ((afs_uint32)avc->asynchrony >= (bytes-stored)) {
- shouldwake = &nomore;
- }
- }
- tfile = afs_CFileOpen(tdc->f.inode);
-#ifndef AFS_NOSTATS
- xferP = &(afs_stats_cmfullperf.rpc.fsXferTimes[AFS_STATS_FS_XFERIDX_STOREDATA]);
- osi_GetuTime(&xferStartTime);
-
- code = afs_CacheStoreProc(tcall, tfile, tdc->f.chunkBytes,
- avc, shouldwake, &bytesToXfer,
- &bytesXferred);
-
- osi_GetuTime(&xferStopTime);
- (xferP->numXfers)++;
- if (!code) {
- (xferP->numSuccesses)++;
- afs_stats_XferSumBytes[AFS_STATS_FS_XFERIDX_STOREDATA] += bytesXferred;
- (xferP->sumBytes) += (afs_stats_XferSumBytes[AFS_STATS_FS_XFERIDX_STOREDATA] >> 10);
- afs_stats_XferSumBytes[AFS_STATS_FS_XFERIDX_STOREDATA] &= 0x3FF;
- if (bytesXferred < xferP->minBytes)
- xferP->minBytes = bytesXferred;
- if (bytesXferred > xferP->maxBytes)
- xferP->maxBytes = bytesXferred;
-
- /*
- * Tally the size of the object. Note: we tally the actual size,
- * NOT the number of bytes that made it out over the wire.
- */
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET0)
- (xferP->count[0])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET1)
- (xferP->count[1])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET2)
- (xferP->count[2])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET3)
- (xferP->count[3])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET4)
- (xferP->count[4])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET5)
- (xferP->count[5])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET6)
- (xferP->count[6])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET7)
- (xferP->count[7])++;
- else
- (xferP->count[8])++;
-
- afs_stats_GetDiff(elapsedTime, xferStartTime, xferStopTime);
- afs_stats_AddTo((xferP->sumTime), elapsedTime);
- afs_stats_SquareAddTo((xferP->sqrTime), elapsedTime);
- if (afs_stats_TimeLessThan(elapsedTime, (xferP->minTime))) {
- afs_stats_TimeAssign((xferP->minTime), elapsedTime);
- }
- if (afs_stats_TimeGreaterThan(elapsedTime, (xferP->maxTime))) {
- afs_stats_TimeAssign((xferP->maxTime), elapsedTime);
- }
- }
-#else
- code = afs_CacheStoreProc(tcall, tfile, tdc->f.chunkBytes, avc,
- shouldwake, &lp1, &lp2);
-#endif /* AFS_NOSTATS */
- afs_CFileClose(tfile);
- if ((tdc->f.chunkBytes < afs_OtherCSize) &&
- (i < (nchunks-1))) {
- int bsent, tlen, tlen1=0, sbytes = afs_OtherCSize - tdc->f.chunkBytes;
- char *tbuffer = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
-
- while (sbytes > 0) {
- tlen = (sbytes > AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ : sbytes);
- bzero(tbuffer, tlen);
-#ifdef RX_ENABLE_LOCKS
- AFS_GUNLOCK();
-#endif /* RX_ENABLE_LOCKS */
- bsent = rx_Write(tcall, tbuffer, tlen);
-#ifdef RX_ENABLE_LOCKS
- AFS_GLOCK();
-#endif /* RX_ENABLE_LOCKS */
-
- if (bsent != tlen) {
- code = -33; /* XXX */
- break;
- }
- sbytes -= tlen;
- }
- osi_FreeLargeSpace(tbuffer);
- }
- stored += tdc->f.chunkBytes;
-
- /* ideally, I'd like to unlock the dcache and turn
- * off the writing bit here, but that would
- * require being able to retry StoreAllSegments in
- * the event of a failure. It only really matters
- * if user can't read from a 'locked' dcache or
- * one which has the writing bit turned on. */
- }
- if (!code) {
- struct AFSFetchStatus OutStatus;
- struct AFSVolSync tsync;
-#ifdef RX_ENABLE_LOCKS
- AFS_GUNLOCK();
-#endif /* RX_ENABLE_LOCKS */
- code = EndRXAFS_StoreData(tcall, &OutStatus, &tsync);
-#ifdef RX_ENABLE_LOCKS
- AFS_GLOCK();
-#endif /* RX_ENABLE_LOCKS */
- hadd32(newDV, 1);
- XSTATS_END_TIME;
-
- /* Now copy out return params */
- UpgradeSToWLock(&avc->lock,28); /* keep out others for a while */
- if (!code) { /* must wait til RPC completes to be sure of this info */
- afs_ProcessFS(avc, &OutStatus, areq);
- /* Keep last (max) size of file on server to see if
- * we need to call afs_StoreMini to extend the file.
- */
- if (!moredata)
- maxStoredLength = OutStatus.Length;
-
+ ReleaseReadLock(&tdc->tlock);
+
+ if (!FidCmp(&tdc->f.fid, &avc->f.fid)
+ && tdc->f.chunk >= minj) {
+ off = tdc->f.chunk - minj;
+ if (off < NCHUNKSATONCE) {
+ /* this is the file, and the correct chunk range */
+ if (j >= NCHUNKSATONCE)
+ osi_Panic
+ ("Too many dcache entries in range\n");
+ dcList[j++] = tdc;
+ } else {
+ moredata = TRUE;
+ afs_PutDCache(tdc);
+ if (j == NCHUNKSATONCE)
+ break;
+ }
+ } else {
+ afs_PutDCache(tdc);
}
- ConvertWToSLock(&avc->lock);
- }
- if (tcall) {
-#ifdef RX_ENABLE_LOCKS
- AFS_GUNLOCK();
-#endif /* RX_ENABLE_LOCKS */
- code = rx_EndCall(tcall, code, avc, base);
-#ifdef RX_ENABLE_LOCKS
- AFS_GLOCK();
-#endif /* RX_ENABLE_LOCKS */
}
- } while (afs_Analyze(tc, code, &avc->fid, areq,
- AFS_STATS_FS_RPCIDX_STOREDATA,
- SHARED_LOCK, (struct cell *)0));
-
- /* put back all remaining locked dcache entries */
- for (i=0; i<nchunks; i++) {
- tdc = dclist[i];
- if (!code) {
- if (afs_indexFlags[tdc->index] & IFDataMod) {
- afs_indexFlags[tdc->index] &= ~IFDataMod;
- afs_stats_cmperf.cacheCurrDirtyChunks--;
- afs_indexFlags[tdc->index] &= ~IFDirtyPages;
- if ( sync & AFS_VMSYNC_INVAL )
- {
- /* since we have invalidated all the pages of this
- ** vnode by calling osi_VM_TryToSmush, we can
- ** safely mark this dcache entry as not having
- ** any pages. This vnode now becomes eligible for
- ** reclamation by getDownD.
- */
- afs_indexFlags[tdc->index] &= ~IFAnyPages;
- }
+ }
+ ReleaseWriteLock(&afs_xdcache);
+
+ for (i = 0; i < j; i++) {
+ /* Iterate over the dcache entries we collected above */
+ tdc = dcList[i];
+ ObtainSharedLock(&tdc->lock, 677);
+
+ /* was code here to clear IFDataMod, but it should only be done
+ * in storedcache and storealldcache.
+ */
+ /* Only increase DV if we had up-to-date data to start with.
+ * Otherwise, we could be falsely upgrading an old chunk
+ * (that we never read) into one labelled with the current
+ * DV #. Also note that we check that no intervening stores
+ * occurred, otherwise we might mislabel cache information
+ * for a chunk that we didn't store this time
+ */
+ /* Don't update the version number if it's not yet set. */
+ if (!hsame(tdc->f.versionNo, h_unset)
+ && hcmp(tdc->f.versionNo, oldDV) >= 0) {
+
+ if ((!(afs_dvhack || foreign)
+ && hsame(avc->f.m.DataVersion, newDV))
+ || ((afs_dvhack || foreign)
+ && (origCBs == afs_allCBs))) {
+ /* no error, this is the DV */
+
+ UpgradeSToWLock(&tdc->lock, 678);
+ hset(tdc->f.versionNo, avc->f.m.DataVersion);
+ tdc->dflags |= DFEntryMod;
+ /* DWriting may not have gotten cleared above, if all
+ * we did was a StoreMini */
+ tdc->f.states &= ~DWriting;
+ ConvertWToSLock(&tdc->lock);
}
}
- tdc->f.states &= ~DWriting; /* correct?*/
- tdc->flags |= DFEntryMod;
- lockedPutDCache(tdc);
- }
- if (code) {
- for (j++; j<=high; j++)
- if ( dcList[j] )
- lockedPutDCache(dcList[j]);
+ ReleaseSharedLock(&tdc->lock);
+ afs_PutDCache(tdc);
}
- afs_Trace2(afs_iclSetp, CM_TRACE_STOREALLDCDONE,
- ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code);
- bytes = 0;
- }
- }
- } /* if (j) */
-
- minj += NCHUNKSATONCE;
- } while ( !code && moredata );
-
- UpgradeSToWLock(&avc->lock,29);
+ minj += NCHUNKSATONCE;
- /* send a trivial truncation store if did nothing else */
- if (code == 0) {
- /*
- * Call StoreMini if we haven't written enough data to extend the
- * file at the fileserver to the client's notion of the file length.
- */
- if ((avc->truncPos != AFS_NOTRUNC) ||
- ((avc->states & CExtendedFile) && (maxStoredLength < avc->m.Length))) {
- code = afs_StoreMini(avc, areq);
- if (code == 0)
- hadd32(newDV, 1); /* just bumped here, too */
- }
- avc->states &= ~CExtendedFile;
- }
-
- /*
- * Finally, turn off DWriting, turn on DFEntryMod,
- * update f.versionNo.
- * A lot of this could be integrated into the loop above
- */
- if (!code) {
- afs_hyper_t h_unset;
- hones(h_unset);
- MObtainWriteLock(&afs_xdcache,285); /* overkill, but it gets the
- * lock in case GetDSlot needs it */
- for(safety = 0, index = afs_dvhashTbl[hash];
- index != NULLIDX && safety < afs_cacheFiles+2;) {
-
- if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
- tdc = afs_GetDSlot(index, 0);
-
- if (!FidCmp(&tdc->f.fid, &avc->fid)) {
- /* this is the file */
- /* was code here to clear IFDataMod, but it should only be done
- * in storedcache and storealldcache.
- */
- /* Only increase DV if we had up-to-date data to start with.
- * Otherwise, we could be falsely upgrading an old chunk
- * (that we never read) into one labelled with the current
- * DV #. Also note that we check that no intervening stores
- * occurred, otherwise we might mislabel cache information
- * for a chunk that we didn't store this time
- */
- /* Don't update the version number if it's not yet set. */
- if (code == 0 && (!hsame(tdc->f.versionNo, h_unset))
- && (hcmp(tdc->f.versionNo, oldDV) >= 0)) {
- if ((!(afs_dvhack || foreign) && hsame(avc->m.DataVersion, newDV))
- || ((afs_dvhack || foreign) && (origCBs == afs_allCBs)) ) {
- /* no error, this is the DV */
- hset(tdc->f.versionNo, avc->m.DataVersion);
- tdc->flags |= DFEntryMod;
- }
- }
- }
- lockedPutDCache(tdc);
- }
- index = afs_dvnextTbl[index];
- }
- MReleaseWriteLock(&afs_xdcache);
+ } while (moredata);
}
if (code) {
* invalidated. Also discard data if it's a permanent error from the
* fileserver.
*/
- if (areq->permWriteError || (avc->states & (CCore1 | CCore))) {
- afs_InvalidateAllSegments(avc, 1);
+ if (areq->permWriteError || (avc->f.states & CCore)) {
+ afs_InvalidateAllSegments(avc);
}
}
afs_Trace3(afs_iclSetp, CM_TRACE_STOREALLDONE, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->m.Length, ICL_TYPE_INT32, code);
- /* would like a Trace5, but it doesn't exist...*/
+ ICL_TYPE_INT32, avc->f.m.Length, ICL_TYPE_INT32, code);
+ /* would like a Trace5, but it doesn't exist... */
afs_Trace3(afs_iclSetp, CM_TRACE_AVCLOCKER, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->lock.wait_states,
- ICL_TYPE_INT32, avc->lock.excl_locked);
+ ICL_TYPE_INT32, avc->lock.wait_states, ICL_TYPE_INT32,
+ avc->lock.excl_locked);
afs_Trace4(afs_iclSetp, CM_TRACE_AVCLOCKEE, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->lock.wait_states,
- ICL_TYPE_INT32, avc->lock.readers_reading,
- ICL_TYPE_INT32, avc->lock.num_waiting );
-
+ ICL_TYPE_INT32, avc->lock.wait_states, ICL_TYPE_INT32,
+ avc->lock.readers_reading, ICL_TYPE_INT32,
+ avc->lock.num_waiting);
+
/*
* Finally, if updated DataVersion matches newDV, we did all of the
* stores. If mapDV indicates that the page cache was flushed up
* Turn off CDirty bit because the stored data is now in sync with server.
*/
if (code == 0 && hcmp(avc->mapDV, oldDV) >= 0) {
- if ((!(afs_dvhack || foreign) && hsame(avc->m.DataVersion, newDV))
- || ((afs_dvhack || foreign) && (origCBs == afs_allCBs)) ) {
- hset(avc->mapDV, newDV);
- avc->states &= ~CDirty;
- }
+ if ((!(afs_dvhack || foreign) && hsame(avc->f.m.DataVersion, newDV))
+ || ((afs_dvhack || foreign) && (origCBs == afs_allCBs))) {
+ hset(avc->mapDV, newDV);
+ avc->f.states &= ~CDirty;
+ }
}
osi_FreeLargeSpace(dcList);
code = 0;
return code;
-
-} /*afs_StoreAllSegments (new 03/02/94)*/
+
+} /*afs_StoreAllSegments (new 03/02/94) */
/*
*
* Parameters:
* avc : Pointer to vcache entry.
- * asetLock : If true, we are to set the afs_xdcache lock; otherwise,
- * the caller has already done it.
*
* Environment:
* For example, called after an error has been detected. Called
- * with avc write-locked.
+ * with avc write-locked, and afs_xdcache unheld.
*/
-
-afs_InvalidateAllSegments(avc, asetLock)
- struct vcache *avc;
- int asetLock;
-
-{ /*afs_InvalidateAllSegments*/
+int
+afs_InvalidateAllSegments(struct vcache *avc)
+{
struct dcache *tdc;
afs_int32 hash;
afs_int32 index;
+ struct dcache **dcList;
+ int i, dcListMax, dcListCount;
AFS_STATCNT(afs_InvalidateAllSegments);
afs_Trace2(afs_iclSetp, CM_TRACE_INVALL, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->m.Length);
- hash = DVHash(&avc->fid);
- avc->truncPos = AFS_NOTRUNC; /* don't truncate later */
- avc->states &= ~CExtendedFile; /* not any more */
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
+ hash = DVHash(&avc->f.fid);
+ avc->f.truncPos = AFS_NOTRUNC; /* don't truncate later */
+ avc->f.states &= ~CExtendedFile; /* not any more */
ObtainWriteLock(&afs_xcbhash, 459);
afs_DequeueCallback(avc);
- avc->states &= ~(CStatd|CDirty); /* mark status information as bad, too */
+ avc->f.states &= ~(CStatd | CDirty); /* mark status information as bad, too */
ReleaseWriteLock(&afs_xcbhash);
- if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
+ if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
osi_dnlc_purgedp(avc);
/* Blow away pages; for now, only for Solaris */
#if (defined(AFS_SUN5_ENV))
if (WriteLocked(&avc->lock))
- osi_ReleaseVM(avc, (struct AFS_UCRED *)0);
+ osi_ReleaseVM(avc, (afs_ucred_t *)0);
#endif
/*
* Block out others from screwing with this table; is a read lock
* sufficient?
*/
- if (asetLock) MObtainWriteLock(&afs_xdcache,286);
- for(index = afs_dvhashTbl[hash]; index != NULLIDX;) {
- if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
- tdc = afs_GetDSlot(index, 0);
- if (!FidCmp(&tdc->f.fid, &avc->fid)) {
- /* same file? we'll zap it */
- if (afs_indexFlags[index] & IFDataMod) {
- afs_stats_cmperf.cacheCurrDirtyChunks--;
- /* don't write it back */
- afs_indexFlags[index] &= ~IFDataMod;
- }
- afs_indexFlags[index] &= ~IFAnyPages;
- ZapDCE(tdc);
- if (vType(avc) == VDIR) {
- DZap(&tdc->f.inode);
+ ObtainWriteLock(&afs_xdcache, 286);
+ dcListMax = 0;
+
+ for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
+ if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
+ tdc = afs_GetValidDSlot(index);
+ if (!tdc) {
+ /* In the case of fatal errors during stores, we MUST
+ * invalidate all of the relevant chunks. Otherwise, the chunks
+ * will be left with the 'new' data that was never successfully
+ * written to the server, but the DV in the dcache is still the
+ * old DV. So, we may indefinitely serve data to applications
+ * that is not actually in the file on the fileserver. If we
+ * cannot afs_GetValidDSlot the appropriate entries, currently
+ * there is no way to ensure the dcache is invalidated. So for
+ * now, to avoid risking serving bad data from the cache, panic
+ * instead. */
+ osi_Panic("afs_InvalidateAllSegments tdc count");
}
+ ReleaseReadLock(&tdc->tlock);
+ if (!FidCmp(&tdc->f.fid, &avc->f.fid))
+ dcListMax++;
+ afs_PutDCache(tdc);
}
- lockedPutDCache(tdc);
- }
- index = afs_dvnextTbl[index];
+ index = afs_dvnextTbl[index];
}
- if (asetLock) MReleaseWriteLock(&afs_xdcache);
+
+ dcList = osi_Alloc(dcListMax * sizeof(struct dcache *));
+ dcListCount = 0;
+
+ for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
+ if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
+ tdc = afs_GetValidDSlot(index);
+ if (!tdc) {
+ /* We cannot proceed after getting this error; we risk serving
+ * incorrect data to applications. So panic instead. See the
+ * above comment next to the previous afs_GetValidDSlot call
+ * for details. */
+ osi_Panic("afs_InvalidateAllSegments tdc store");
+ }
+ ReleaseReadLock(&tdc->tlock);
+ if (!FidCmp(&tdc->f.fid, &avc->f.fid)) {
+ /* same file? we'll zap it */
+ if (afs_indexFlags[index] & IFDataMod) {
+ afs_stats_cmperf.cacheCurrDirtyChunks--;
+ /* don't write it back */
+ afs_indexFlags[index] &= ~IFDataMod;
+ }
+ afs_indexFlags[index] &= ~IFAnyPages;
+ if (dcListCount < dcListMax)
+ dcList[dcListCount++] = tdc;
+ else
+ afs_PutDCache(tdc);
+ } else {
+ afs_PutDCache(tdc);
+ }
+ }
+ index = afs_dvnextTbl[index];
+ }
+ ReleaseWriteLock(&afs_xdcache);
+
+ for (i = 0; i < dcListCount; i++) {
+ tdc = dcList[i];
+
+ ObtainWriteLock(&tdc->lock, 679);
+ ZapDCE(tdc);
+ if (vType(avc) == VDIR)
+ DZap(tdc);
+ ReleaseWriteLock(&tdc->lock);
+ afs_PutDCache(tdc);
+ }
+
+ osi_Free(dcList, dcListMax * sizeof(struct dcache *));
+
return 0;
+}
+
+/*!
+ *
+ * Extend a cache file
+ *
+ * \param avc pointer to vcache to extend data for
+ * \param alen Length to extend file to
+ * \param areq
+ *
+ * \note avc must be write locked. May release and reobtain avc and GLOCK
+ */
+int
+afs_ExtendSegments(struct vcache *avc, afs_size_t alen, struct vrequest *areq)
+{
+ afs_size_t offset, toAdd;
+ struct osi_file *tfile;
+ afs_int32 code = 0;
+ struct dcache *tdc;
+ void *zeros;
+
+ zeros = afs_osi_Alloc(AFS_PAGESIZE);
+ if (zeros == NULL)
+ return ENOMEM;
+ memset(zeros, 0, AFS_PAGESIZE);
-} /*afs_InvalidateAllSegments*/
+ while (avc->f.m.Length < alen) {
+ tdc = afs_ObtainDCacheForWriting(avc, avc->f.m.Length, alen - avc->f.m.Length, areq, 0);
+ if (!tdc) {
+ code = EIO;
+ break;
+ }
+ toAdd = alen - avc->f.m.Length;
+
+ offset = avc->f.m.Length - AFS_CHUNKTOBASE(tdc->f.chunk);
+ if (offset + toAdd > AFS_CHUNKTOSIZE(tdc->f.chunk)) {
+ toAdd = AFS_CHUNKTOSIZE(tdc->f.chunk) - offset;
+ }
+ tfile = afs_CFileOpen(&tdc->f.inode);
+ while(tdc->validPos < avc->f.m.Length + toAdd) {
+ afs_size_t towrite;
+
+ towrite = (avc->f.m.Length + toAdd) - tdc->validPos;
+ if (towrite > AFS_PAGESIZE) towrite = AFS_PAGESIZE;
+
+ code = afs_CFileWrite(tfile,
+ tdc->validPos - AFS_CHUNKTOBASE(tdc->f.chunk),
+ zeros, towrite);
+ tdc->validPos += towrite;
+ }
+ afs_CFileClose(tfile);
+ afs_AdjustSize(tdc, offset + toAdd );
+ avc->f.m.Length += toAdd;
+ ReleaseWriteLock(&tdc->lock);
+ afs_PutDCache(tdc);
+ }
+
+ afs_osi_Free(zeros, AFS_PAGESIZE);
+ return code;
+}
/*
* afs_TruncateAllSegments
* Called with avc write-locked; in VFS40 systems, pvnLock is also
* held.
*/
-afs_TruncateAllSegments(avc, alen, areq, acred)
- afs_int32 alen;
- register struct vcache *avc;
- struct vrequest *areq;
- struct AFS_UCRED *acred;
-{ /*afs_TruncateAllSegments*/
-
- register struct dcache *tdc;
- register afs_int32 code;
- register afs_int32 index;
- afs_int32 newSize;
+int
+afs_TruncateAllSegments(struct vcache *avc, afs_size_t alen,
+ struct vrequest *areq, afs_ucred_t *acred)
+{
+ struct dcache *tdc;
+ afs_int32 code;
+ afs_int32 index;
+ afs_size_t newSize;
+
+ int dcCount, dcPos;
+ struct dcache **tdcArray = NULL;
AFS_STATCNT(afs_TruncateAllSegments);
- avc->m.Date = osi_Time();
- if (alen >= avc->m.Length) {
+ avc->f.m.Date = osi_Time();
+ afs_Trace3(afs_iclSetp, CM_TRACE_TRUNCALL, ICL_TYPE_POINTER, avc,
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(alen));
+ if (alen >= avc->f.m.Length) {
/*
* Special speedup since Sun's vm extends the file this way;
* we've never written to the file thus we can just set the new
* should keep the ExtendedPos as well and clear this flag if we
* truncate below that value before we store the file back.
*/
- avc->states |= CExtendedFile;
- avc->m.Length = alen;
- afs_Trace3(afs_iclSetp, CM_TRACE_TRUNCALL1, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->m.Length, ICL_TYPE_INT32, alen);
+ avc->f.states |= CExtendedFile;
+ avc->f.m.Length = alen;
return 0;
}
-
- afs_Trace3(afs_iclSetp, CM_TRACE_TRUNCALL2, ICL_TYPE_POINTER, avc,
- ICL_TYPE_INT32, avc->m.Length, ICL_TYPE_INT32, alen);
-
#if (defined(AFS_SUN5_ENV))
/* Zero unused portion of last page */
osi_VM_Truncate(avc, alen, acred);
AFS_GLOCK();
- ObtainWriteLock(&avc->lock,79);
+ ObtainWriteLock(&avc->lock, 79);
+
+ avc->f.m.Length = alen;
+
+ if (alen < avc->f.truncPos)
+ avc->f.truncPos = alen;
+ code = DVHash(&avc->f.fid);
- avc->m.Length = alen;
-
- if (alen < avc->truncPos) avc->truncPos = alen;
- code = DVHash(&avc->fid);
/* block out others from screwing with this table */
- MObtainWriteLock(&afs_xdcache,287);
- for(index = afs_dvhashTbl[code]; index != NULLIDX;) {
- if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
- tdc = afs_GetDSlot(index, 0);
- if (!FidCmp(&tdc->f.fid, &avc->fid)) {
- /* same file, and modified, we'll store it back */
- newSize = alen - AFS_CHUNKTOBASE(tdc->f.chunk);
- if (newSize < 0) newSize = 0;
- if (newSize < tdc->f.chunkBytes) {
- register struct osi_file *tfile;
- tfile = afs_CFileOpen(tdc->f.inode);
- afs_CFileTruncate(tfile, newSize);
- afs_CFileClose(tfile);
- afs_AdjustSize(tdc, newSize);
+ ObtainWriteLock(&afs_xdcache, 287);
+
+ dcCount = 0;
+ for (index = afs_dvhashTbl[code]; index != NULLIDX;) {
+ if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
+ tdc = afs_GetValidDSlot(index);
+ if (!tdc) {
+ ReleaseWriteLock(&afs_xdcache);
+ code = EIO;
+ goto done;
}
+ ReleaseReadLock(&tdc->tlock);
+ if (!FidCmp(&tdc->f.fid, &avc->f.fid))
+ dcCount++;
+ afs_PutDCache(tdc);
}
- lockedPutDCache(tdc);
- }
- index = afs_dvnextTbl[index];
+ index = afs_dvnextTbl[index];
+ }
+
+ /* Now allocate space where we can save those dcache entries, and
+ * do a second pass over them.. Since we're holding xdcache, it
+ * shouldn't be changing.
+ */
+ tdcArray = osi_Alloc(dcCount * sizeof(struct dcache *));
+ dcPos = 0;
+
+ for (index = afs_dvhashTbl[code]; index != NULLIDX; index = afs_dvnextTbl[index]) {
+ if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
+ tdc = afs_GetValidDSlot(index);
+ if (!tdc) {
+ /* make sure we put back all of the tdcArray members before
+ * bailing out */
+ /* remember, the last valid tdc is at dcPos-1, so start at
+ * dcPos-1, not at dcPos itself. */
+ for (dcPos = dcPos - 1; dcPos >= 0; dcPos--) {
+ tdc = tdcArray[dcPos];
+ afs_PutDCache(tdc);
+ }
+ code = EIO;
+ goto done;
+ }
+ ReleaseReadLock(&tdc->tlock);
+ if (!FidCmp(&tdc->f.fid, &avc->f.fid)) {
+ /* same file, and modified, we'll store it back */
+ if (dcPos < dcCount) {
+ tdcArray[dcPos++] = tdc;
+ } else {
+ afs_PutDCache(tdc);
+ }
+ } else {
+ afs_PutDCache(tdc);
+ }
+ }
+ }
+
+ ReleaseWriteLock(&afs_xdcache);
+
+ /* Now we loop over the array of dcache entries and truncate them */
+ for (index = 0; index < dcPos; index++) {
+ struct osi_file *tfile;
+
+ tdc = tdcArray[index];
+
+ newSize = alen - AFS_CHUNKTOBASE(tdc->f.chunk);
+ if (newSize < 0)
+ newSize = 0;
+ ObtainSharedLock(&tdc->lock, 672);
+ if (newSize < tdc->f.chunkBytes && newSize < MAX_AFS_UINT32) {
+ UpgradeSToWLock(&tdc->lock, 673);
+ tdc->f.states |= DWriting;
+ tfile = afs_CFileOpen(&tdc->f.inode);
+ afs_CFileTruncate(tfile, (afs_int32)newSize);
+ afs_CFileClose(tfile);
+ afs_AdjustSize(tdc, (afs_int32)newSize);
+ if (alen < tdc->validPos) {
+ if (alen < AFS_CHUNKTOBASE(tdc->f.chunk))
+ tdc->validPos = 0;
+ else
+ tdc->validPos = alen;
+ }
+ ConvertWToSLock(&tdc->lock);
+ }
+ ReleaseSharedLock(&tdc->lock);
+ afs_PutDCache(tdc);
+ }
+
+ code = 0;
+
+ done:
+ if (tdcArray) {
+ osi_Free(tdcArray, dcCount * sizeof(struct dcache *));
}
#if (defined(AFS_SUN5_ENV))
ObtainWriteLock(&avc->vlock, 547);
}
ReleaseWriteLock(&avc->vlock);
#endif
- MReleaseWriteLock(&afs_xdcache);
- return 0;
-
-} /*afs_TruncateAllSegments*/
-
+ return code;
+}
git://git.openafs.org / openafs.git / blobdiff