/*
* Copyright 2000, International Business Machines Corporation and others.
* All Rights Reserved.
- *
+ *
* 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
*/
+
+#include <afsconfig.h>
#include <afs/param.h>
+#include <roken.h>
+
#include <afs/stds.h>
#include <windows.h>
#include <winsock2.h>
#include <nb30.h>
-#ifdef COMMENT
-#include <malloc.h>
-#endif
#include <string.h>
#include <stdlib.h>
#include <osi.h>
#include "afsd.h"
+#include "smb.h"
#ifdef DEBUG
extern void afsi_log(char *pattern, ...);
extern osi_mutex_t cm_Freelance_Lock;
#endif
-#ifdef AFS_LARGEFILES
+#define USE_RX_IOVEC 1
+
/* we can access connp->serverp without holding a lock because that
never changes since the connection is made. */
#define SERVERHAS64BIT(connp) (!((connp)->serverp->flags & CM_SERVERFLAG_NO64BIT))
#define SET_SERVERHASNO64BIT(connp) (cm_SetServerNo64Bit((connp)->serverp, TRUE))
-#else
-#define SERVERHAS64BIT(connp) (FALSE)
-#define SET_SERVERHASNO64BIT(connp) (FALSE)
-#endif
/* functions called back from the buffer package when reading or writing data,
* or when holding or releasing a vnode pointer.
long cm_BufWrite(void *vscp, osi_hyper_t *offsetp, long length, long flags,
cm_user_t *userp, cm_req_t *reqp)
{
- /* store the data back from this buffer; the buffer is locked and held,
- * but the vnode involved isn't locked, yet. It is held by its
- * reference from the buffer, which won't change until the buffer is
- * released by our caller. Thus, we don't have to worry about holding
- * bufp->scp.
+ /*
+ * store the data back from this buffer; the buffer is locked and held,
+ * but the vnode involved may or may not be locked depending on whether
+ * or not the CM_BUF_WRITE_SCP_LOCKED flag is set.
*/
long code, code1;
cm_scache_t *scp = vscp;
afs_int32 nbytes;
-#ifdef AFS_LARGEFILES
afs_int32 save_nbytes;
-#endif
+ cm_scache_t save_scache;
long temp;
AFSFetchStatus outStatus;
AFSStoreStatus inStatus;
cm_bulkIO_t biod; /* bulk IO descriptor */
int require_64bit_ops = 0;
int call_was_64bit = 0;
+ int scp_locked = flags & CM_BUF_WRITE_SCP_LOCKED;
+ int storedata_excl = 0;
osi_assertx(userp != NULL, "null cm_user_t");
osi_assertx(scp != NULL, "null cm_scache_t");
memset(&volSync, 0, sizeof(volSync));
- /* now, the buffer may or may not be filled with good data (buf_GetNew
+ /*
+ * now, the buffer may or may not be filled with good data (buf_GetNewLocked
* drops lots of locks, and may indeed return a properly initialized
* buffer, although more likely it will just return a new, empty, buffer.
*/
-
- lock_ObtainWrite(&scp->rw);
+ if (!scp_locked)
+ lock_ObtainWrite(&scp->rw);
if (scp->flags & CM_SCACHEFLAG_DELETED) {
- lock_ReleaseWrite(&scp->rw);
+ if (!scp_locked)
+ lock_ReleaseWrite(&scp->rw);
return CM_ERROR_NOSUCHFILE;
}
/* Serialize StoreData RPC's; for rationale see cm_scache.c */
(void) cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA_EXCL);
+ storedata_excl = 1;
code = cm_SetupStoreBIOD(scp, offsetp, length, &biod, userp, reqp);
if (code) {
osi_Log1(afsd_logp, "cm_SetupStoreBIOD code %x", code);
cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
- lock_ReleaseWrite(&scp->rw);
+ if (!scp_locked)
+ lock_ReleaseWrite(&scp->rw);
return code;
}
if (biod.length == 0) {
osi_Log0(afsd_logp, "cm_SetupStoreBIOD length 0");
cm_ReleaseBIOD(&biod, 1, 0, 1); /* should be a NOOP */
- cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
- lock_ReleaseWrite(&scp->rw);
- return 0;
+ code = 0;
+ goto exit_storedata_excl;
}
/* prepare the output status for the store */
- scp->mask |= CM_SCACHEMASK_CLIENTMODTIME;
+ _InterlockedOr(&scp->mask, CM_SCACHEMASK_CLIENTMODTIME);
cm_StatusFromAttr(&inStatus, scp, NULL);
truncPos = scp->length;
if ((scp->mask & CM_SCACHEMASK_TRUNCPOS)
- && LargeIntegerLessThan(scp->truncPos, truncPos))
+ && LargeIntegerLessThan(scp->truncPos, truncPos)) {
truncPos = scp->truncPos;
- scp->mask &= ~CM_SCACHEMASK_TRUNCPOS;
-
+ _InterlockedAnd(&scp->mask, ~CM_SCACHEMASK_TRUNCPOS);
+ }
+
/* compute how many bytes to write from this buffer */
thyper = LargeIntegerSubtract(scp->length, biod.offset);
if (LargeIntegerLessThanZero(thyper)) {
ConvertLongToLargeInteger(LONG_MAX))) {
require_64bit_ops = 1;
}
-
- lock_ReleaseWrite(&scp->rw);
/* now we're ready to do the store operation */
-#ifdef AFS_LARGEFILES
+ retry_rpc:
+ InterlockedIncrement(&scp->activeRPCs);
+ lock_ReleaseWrite(&scp->rw);
+
save_nbytes = nbytes;
-#endif
+ save_scache = *scp;
+
do {
code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
- if (code)
+ if (code)
continue;
retry:
rxcallp = rx_NewCall(rxconnp);
rx_PutConnection(rxconnp);
-#ifdef AFS_LARGEFILES
if (SERVERHAS64BIT(connp)) {
call_was_64bit = 1;
osi_Log4(afsd_logp, "CALL StartRXAFS_StoreData64 scp 0x%p, offset 0x%x:%08x, length 0x%x",
scp, biod.offset.HighPart, biod.offset.LowPart, nbytes);
+ osi_Log2(afsd_logp, "... truncPos 0x%x:%08x", truncPos.HighPart, truncPos.LowPart);
code = StartRXAFS_StoreData64(rxcallp, &tfid, &inStatus,
biod.offset.QuadPart,
osi_Log0(afsd_logp, "CALL StartRXAFS_StoreData SUCCESS");
}
}
-#else
- osi_Log4(afsd_logp, "CALL StartRXAFS_StoreData scp 0x%p, offset 0x%x:%08x, length 0x%x",
- scp, biod.offset.HighPart, biod.offset.LowPart, nbytes);
-
- code = StartRXAFS_StoreData(rxcallp, &tfid, &inStatus,
- biod.offset.LowPart, nbytes, truncPos.LowPart);
- if (code)
- osi_Log1(afsd_logp, "CALL StartRXAFS_StoreData FAILURE, code 0x%x", code);
- else
- osi_Log0(afsd_logp, "CALL StartRXAFS_StoreData SUCCESS");
-#endif
if (code == 0) {
+ afs_uint32 buf_offset = 0, bytes_copied = 0;
+
/* write the data from the the list of buffers */
qdp = NULL;
while(nbytes > 0) {
- afs_uint32 buf_offset;
+#ifdef USE_RX_IOVEC
+ struct iovec tiov[RX_MAXIOVECS];
+ afs_int32 tnio, vlen, vbytes, iov, voffset;
+ afs_uint32 vleft;
+
+ vbytes = rx_WritevAlloc(rxcallp, tiov, &tnio, RX_MAXIOVECS, nbytes);
+ if (vbytes <= 0) {
+ code = RX_PROTOCOL_ERROR;
+ break;
+ }
+
+ for ( iov = voffset = vlen = 0;
+ vlen < vbytes && iov < tnio; vlen += wbytes) {
+ if (qdp == NULL) {
+ qdp = biod.bufListEndp;
+ buf_offset = offsetp->LowPart % cm_data.buf_blockSize;
+ } else if (buf_offset == cm_data.buf_blockSize) {
+ qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
+ buf_offset = 0;
+ }
+
+ osi_assertx(qdp != NULL, "null osi_queueData_t");
+ bufp = osi_GetQData(qdp);
+ bufferp = bufp->datap + buf_offset;
+ wbytes = vbytes - vlen;
+ if (wbytes > cm_data.buf_blockSize - buf_offset)
+ wbytes = cm_data.buf_blockSize - buf_offset;
+
+ vleft = tiov[iov].iov_len - voffset;
+ while (wbytes > vleft && iov < tnio) {
+ memcpy(tiov[iov].iov_base + voffset, bufferp, vleft);
+ bytes_copied += vleft;
+ vlen += vleft;
+ wbytes -= vleft;
+ bufferp += vleft;
+ buf_offset += vleft;
+
+ iov++;
+ voffset = 0;
+ vleft = tiov[iov].iov_len;
+ }
+
+ if (iov < tnio) {
+ memcpy(tiov[iov].iov_base + voffset, bufferp, wbytes);
+ bytes_copied += wbytes;
+ if (tiov[iov].iov_len == voffset + wbytes) {
+ iov++;
+ voffset = 0;
+ vleft = (iov < tnio) ? tiov[iov].iov_len : 0;
+ } else {
+ voffset += wbytes;
+ vleft -= wbytes;
+ }
+ bufferp += wbytes;
+ buf_offset += wbytes;
+ } else {
+ voffset = vleft = 0;
+ }
+ }
+
+ osi_assertx(iov == tnio, "incorrect iov count");
+ osi_assertx(vlen == vbytes, "bytes_copied != vbytes");
+ osi_assertx(bufp->offset.QuadPart + buf_offset == biod.offset.QuadPart + bytes_copied,
+ "begin and end offsets don't match");
+
+ temp = rx_Writev(rxcallp, tiov, tnio, vbytes);
+ if (temp != vbytes) {
+ osi_Log3(afsd_logp, "rx_Writev failed bp 0x%p, %d != %d", bufp, temp, vbytes);
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ break;
+ }
+
+ osi_Log2(afsd_logp, "rx_Writev succeeded iov offset 0x%x, wrote 0x%x",
+ (unsigned long)(bufp->offset.QuadPart + buf_offset - vbytes), vbytes);
+ nbytes -= vbytes;
+#else /* USE_RX_IOVEC */
if (qdp == NULL) {
qdp = biod.bufListEndp;
buf_offset = offsetp->LowPart % cm_data.buf_blockSize;
qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
buf_offset = 0;
}
+
osi_assertx(qdp != NULL, "null osi_queueData_t");
bufp = osi_GetQData(qdp);
bufferp = bufp->datap + buf_offset;
/* write out wbytes of data from bufferp */
temp = rx_Write(rxcallp, bufferp, wbytes);
if (temp != wbytes) {
- osi_Log3(afsd_logp, "rx_Write failed bp 0x%p, %d != %d",bufp,temp,wbytes);
+ osi_Log3(afsd_logp, "rx_Write failed bp 0x%p, %d != %d", bufp, temp, wbytes);
code = (rxcallp->error < 0) ? rxcallp->error : RX_PROTOCOL_ERROR;
break;
} else {
- osi_Log2(afsd_logp, "rx_Write succeeded bp 0x%p, %d",bufp,temp);
- }
+ osi_Log2(afsd_logp, "rx_Write succeeded bp 0x%p written %d", bufp, temp);
+ }
nbytes -= wbytes;
+#endif /* USE_RX_IOVEC */
+
+ /*
+ * Rx supports an out of band signalling mechanism that permits
+ * RPC specific status information to be communicated in the
+ * reverse direction of the channel. For RXAFS_StoreData, the
+ * 0-bit is set once all of the permission checks have completed
+ * and the volume/vnode locks have been obtained by the file
+ * server. The signal is intended to notify the Unix afs client
+ * that is performing store-on-close that it is safe to permit
+ * the close operation to complete while the store continues
+ * in the background. All of the callbacks have been broken
+ * and the locks will not be dropped until the RPC completes
+ * which prevents any other operation from being initiated on
+ * the vnode until the store is finished.
+ *
+ * The Windows client does not perform store-on-close. Instead
+ * it uses the CM_SCACHESYNC_STOREDATA_EXCL request flag and
+ * CM_SCACHEFLAG_DATASTORING scache state to ensure that store
+ * operations are serialized. The 0-bit signal permits the
+ * CM_SCACHEFLAG_DATASTORING state to the dropped which in
+ * turn permits another thread to prep its own BIOD in parallel.
+ * This is safe because it is impossible for that second store
+ * RPC to complete before this one does.
+ */
+ if ( storedata_excl && (rx_GetRemoteStatus(rxcallp) & 1)) {
+ lock_ObtainWrite(&scp->rw);
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
+ lock_ReleaseWrite(&scp->rw);
+ storedata_excl = 0;
+ }
} /* while more bytes to write */
} /* if RPC started successfully */
code1 = rx_EndCall(rxcallp, code);
-#ifdef AFS_LARGEFILES
if ((code == RXGEN_OPCODE || code1 == RXGEN_OPCODE) && SERVERHAS64BIT(connp)) {
SET_SERVERHASNO64BIT(connp);
qdp = NULL;
nbytes = save_nbytes;
goto retry;
}
-#endif
- /* Prefer StoreData error over rx_EndCall error */
- if (code1 != 0)
+ /* Prefer rx_EndCall error over StoreData error */
+ if (code1 != 0) {
+ osi_Log2(afsd_logp, "rx_EndCall converted 0x%x to 0x%x", code, code1);
code = code1;
- } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync, NULL, NULL, code));
+ }
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, 1, &volSync, NULL, NULL, code));
code = cm_MapRPCError(code, reqp);
/* now, clean up our state */
lock_ObtainWrite(&scp->rw);
- cm_ReleaseBIOD(&biod, 1, code, 1);
- cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
-
if (code == 0) {
osi_hyper_t t;
/* now, here's something a little tricky: in AFS 3, a dirty
}
if (LargeIntegerGreaterThanOrEqualTo(t, scp->length))
- scp->mask &= ~CM_SCACHEMASK_LENGTH;
+ _InterlockedAnd(&scp->mask, ~CM_SCACHEMASK_LENGTH);
cm_MergeStatus(NULL, scp, &outStatus, &volSync, userp, reqp, CM_MERGEFLAG_STOREDATA);
} else {
+ InterlockedDecrement(&scp->activeRPCs);
if (code == CM_ERROR_SPACE)
- scp->flags |= CM_SCACHEFLAG_OUTOFSPACE;
+ _InterlockedOr(&scp->flags, CM_SCACHEFLAG_OUTOFSPACE);
else if (code == CM_ERROR_QUOTA)
- scp->flags |= CM_SCACHEFLAG_OVERQUOTA;
+ _InterlockedOr(&scp->flags, CM_SCACHEFLAG_OVERQUOTA);
}
- lock_ReleaseWrite(&scp->rw);
+
+ if ( cm_verifyData )
+ {
+ if (!cm_VerifyStoreData(&biod, &save_scache)) {
+ /* file server content doesn't match what we sent. */
+ nbytes = save_nbytes;
+ goto retry_rpc;
+ }
+ }
+
+ cm_ReleaseBIOD(&biod, 1, code, 1);
+
+ exit_storedata_excl:
+ if (storedata_excl)
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
+
+ if (!scp_locked)
+ lock_ReleaseWrite(&scp->rw);
return code;
}
memset(&volSync, 0, sizeof(volSync));
+ osi_Log2(afsd_logp, "cm_StoreMini scp 0x%p userp 0x%p", scp, userp);
+
/* Serialize StoreData RPC's; for rationale see cm_scache.c */
(void) cm_SyncOp(scp, NULL, userp, reqp, 0,
CM_SCACHESYNC_STOREDATA_EXCL);
/* prepare the output status for the store */
inStatus.Mask = AFS_SETMODTIME;
inStatus.ClientModTime = scp->clientModTime;
- scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
+ _InterlockedAnd(&scp->mask, ~CM_SCACHEMASK_CLIENTMODTIME);
/* calculate truncation position */
truncPos = scp->length;
if ((scp->mask & CM_SCACHEMASK_TRUNCPOS)
&& LargeIntegerLessThan(scp->truncPos, truncPos))
truncPos = scp->truncPos;
- scp->mask &= ~CM_SCACHEMASK_TRUNCPOS;
+ _InterlockedAnd(&scp->mask, ~CM_SCACHEMASK_TRUNCPOS);
if (LargeIntegerGreaterThan(truncPos,
ConvertLongToLargeInteger(LONG_MAX))) {
require_64bit_ops = 1;
}
+ InterlockedIncrement(&scp->activeRPCs);
lock_ReleaseWrite(&scp->rw);
cm_AFSFidFromFid(&tfid, &scp->fid);
/* now we're ready to do the store operation */
do {
code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
- if (code)
+ if (code)
continue;
- retry:
+ retry:
rxconnp = cm_GetRxConn(connp);
rxcallp = rx_NewCall(rxconnp);
rx_PutConnection(rxconnp);
-#ifdef AFS_LARGEFILES
if (SERVERHAS64BIT(connp)) {
call_was_64bit = 1;
+ osi_Log3(afsd_logp, "CALL StartRXAFS_StoreData64 scp 0x%p, truncPos 0x%x:%08x",
+ scp, truncPos.HighPart, truncPos.LowPart);
+
code = StartRXAFS_StoreData64(rxcallp, &tfid, &inStatus,
0, 0, truncPos.QuadPart);
+ if (code)
+ osi_Log1(afsd_logp, "CALL StartRXAFS_StoreData64 FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL StartRXAFS_StoreData64 SUCCESS");
} else {
call_was_64bit = 0;
if (require_64bit_ops) {
code = CM_ERROR_TOOBIG;
} else {
+ osi_Log3(afsd_logp, "CALL StartRXAFS_StoreData scp 0x%p, truncPos 0x%x:%08x",
+ scp, truncPos.HighPart, truncPos.LowPart);
+
code = StartRXAFS_StoreData(rxcallp, &tfid, &inStatus,
0, 0, truncPos.LowPart);
+ if (code)
+ osi_Log1(afsd_logp, "CALL StartRXAFS_StoreData FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL StartRXAFS_StoreData SUCCESS");
}
}
-#else
- code = StartRXAFS_StoreData(rxcallp, &tfid, &inStatus,
- 0, 0, truncPos.LowPart);
-#endif
if (code == 0) {
- if (call_was_64bit)
+ if (call_was_64bit) {
code = EndRXAFS_StoreData64(rxcallp, &outStatus, &volSync);
- else
+ if (code)
+ osi_Log2(afsd_logp, "EndRXAFS_StoreData64 FAILURE scp 0x%p code %lX", scp, code);
+ else
+ osi_Log0(afsd_logp, "EndRXAFS_StoreData64 SUCCESS");
+ } else {
code = EndRXAFS_StoreData(rxcallp, &outStatus, &volSync);
+ if (code)
+ osi_Log2(afsd_logp, "EndRXAFS_StoreData FAILURE scp 0x%p code %lX", scp, code);
+ else
+ osi_Log0(afsd_logp, "EndRXAFS_StoreData SUCCESS");
+ }
}
code1 = rx_EndCall(rxcallp, code);
-#ifdef AFS_LARGEFILES
if ((code == RXGEN_OPCODE || code1 == RXGEN_OPCODE) && SERVERHAS64BIT(connp)) {
SET_SERVERHASNO64BIT(connp);
goto retry;
}
-#endif
+
/* prefer StoreData error over rx_EndCall error */
if (code == 0 && code1 != 0)
code = code1;
- } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync, NULL, NULL, code));
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, 1, &volSync, NULL, NULL, code));
code = cm_MapRPCError(code, reqp);
-
+
/* now, clean up our state */
lock_ObtainWrite(&scp->rw);
- cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
-
if (code == 0) {
osi_hyper_t t;
/*
}
if (LargeIntegerGreaterThanOrEqualTo(t, scp->length))
- scp->mask &= ~CM_SCACHEMASK_LENGTH;
+ _InterlockedAnd(&scp->mask, ~CM_SCACHEMASK_LENGTH);
cm_MergeStatus(NULL, scp, &outStatus, &volSync, userp, reqp, CM_MERGEFLAG_STOREDATA);
+ } else {
+ InterlockedDecrement(&scp->activeRPCs);
}
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
return code;
}
return 0;
}
-/* stabilize scache entry, and return with it locked so
- * it stays stable.
+/*
+ * stabilize scache entry with CM_SCACHESYNC_SETSIZE. This prevents any new
+ * data buffers to be allocated, new data to be fetched from the file server,
+ * and writes to be accepted from the application but permits dirty buffers
+ * to be written to the file server.
+ *
+ * Stabilize uses cm_SyncOp to maintain the cm_scache_t in this stable state
+ * instead of holding the rwlock exclusively. This permits background stores
+ * to be performed in parallel and in particular allow FlushFile to be
+ * implemented without violating the locking hierarchy.
*/
long cm_BufStabilize(void *vscp, cm_user_t *userp, cm_req_t *reqp)
{
long code;
lock_ObtainWrite(&scp->rw);
- code = cm_SyncOp(scp, NULL, userp, reqp, 0,
+ code = cm_SyncOp(scp, NULL, userp, reqp, 0,
CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_SETSIZE);
- if (code) {
- lock_ReleaseWrite(&scp->rw);
- return code;
- }
-
- return 0;
+ lock_ReleaseWrite(&scp->rw);
+
+ return code;
}
/* undoes the work that cm_BufStabilize does: releases lock so things can change again */
long cm_BufUnstabilize(void *vscp, cm_user_t *userp)
{
cm_scache_t *scp = vscp;
-
+
+ lock_ObtainWrite(&scp->rw);
cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_SETSIZE);
lock_ReleaseWrite(&scp->rw);
-
+
/* always succeeds */
return 0;
}
code = bufp->flags & CM_BUF_DIRTY;
/* release lock if we obtained it here */
- if (!isBufLocked)
+ if (!isBufLocked)
lock_ReleaseMutex(&bufp->mx);
/* if buffer was dirty, buffer is acceptable for use */
- if (code)
+ if (code)
return 1;
- else
+ else
return 0;
}
long code;
cm_buf_t *bp;
int stop;
-
+
/* now scan all buffers in the range, looking for any that look like
* they need work.
*/
CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
if (code)
return code;
-
+
if (LargeIntegerGreaterThanOrEqualTo(tbase, scp->length)) {
/* we're past the end of file */
break;
}
- bp = buf_Find(scp, &tbase);
+ bp = buf_Find(&scp->fid, &tbase);
/* We cheat slightly by not locking the bp mutex. */
if (bp) {
- if ((bp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMBKGFETCH)) == 0
+ if ((bp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING)) == 0
&& (bp->dataVersion < scp->bufDataVersionLow || bp->dataVersion > scp->dataVersion))
stop = 1;
buf_Release(bp);
bp = NULL;
}
- else
+ else
stop = 1;
/* if this buffer is essentially guaranteed to require a fetch,
* break out here and return this position.
*/
- if (stop)
+ if (stop)
break;
-
+
tbase = LargeIntegerAdd(tbase, tblocksize);
tlength = LargeIntegerSubtract(tlength, tblocksize);
}
-
+
/* if we get here, either everything is fine or 'stop' stopped us at a
* particular buffer in the range that definitely needs to be fetched.
*/
if (stop == 0) {
/* return non-zero code since realBasep won't be valid */
code = -1;
- }
+ }
else {
/* successfully found a page that will need fetching */
*realBasep = tbase;
afs_int32
cm_BkgStore(cm_scache_t *scp, afs_uint32 p1, afs_uint32 p2, afs_uint32 p3, afs_uint32 p4,
- cm_user_t *userp)
+ cm_user_t *userp, cm_req_t *reqp)
{
osi_hyper_t toffset;
long length;
- cm_req_t req;
long code = 0;
+ afs_uint32 req_flags = reqp->flags;
if (scp->flags & CM_SCACHEFLAG_DELETED) {
osi_Log4(afsd_logp, "Skipping BKG store - Deleted scp 0x%p, offset 0x%x:%08x, length 0x%x", scp, p2, p1, p3);
} else {
- cm_InitReq(&req);
-
/* Retries will be performed by the BkgDaemon thread if appropriate */
- req.flags |= CM_REQ_NORETRY;
+ reqp->flags |= CM_REQ_NORETRY;
toffset.LowPart = p1;
toffset.HighPart = p2;
osi_Log4(afsd_logp, "Starting BKG store scp 0x%p, offset 0x%x:%08x, length 0x%x", scp, p2, p1, p3);
- code = cm_BufWrite(scp, &toffset, length, /* flags */ 0, userp, &req);
+ code = cm_BufWrite(scp, &toffset, length, /* flags */ 0, userp, reqp);
osi_Log4(afsd_logp, "Finished BKG store scp 0x%p, offset 0x%x:%08x, code 0x%x", scp, p2, p1, code);
+
+ reqp->flags = req_flags;
}
- /*
+ /*
* Keep the following list synchronized with the
- * error code list in cm_BkgDaemon
+ * error code list in cm_BkgDaemon
*/
switch ( code ) {
case CM_ERROR_TIMEDOUT: /* or server restarting */
cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_ASYNCSTORE);
lock_ReleaseWrite(&scp->rw);
}
+
return code;
}
if (LargeIntegerGreaterThan(end, scp->prefetch.end))
scp->prefetch.end = end;
}
- scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
+ _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_PREFETCHING);
}
/* do the prefetch. if the prefetch fails, return 0 (success)
* because there is no harm done. */
afs_int32
cm_BkgPrefetch(cm_scache_t *scp, afs_uint32 p1, afs_uint32 p2, afs_uint32 p3, afs_uint32 p4,
- cm_user_t *userp)
+ cm_user_t *userp, cm_req_t *reqp)
{
osi_hyper_t length;
osi_hyper_t base;
afs_int32 code;
int rxheld = 0;
cm_buf_t *bp = NULL;
- cm_req_t req;
-
- cm_InitReq(&req);
+ afs_uint32 req_flags;
/* Retries will be performed by the BkgDaemon thread if appropriate */
- req.flags |= CM_REQ_NORETRY;
-
+ req_flags = reqp->flags;
+ reqp->flags |= CM_REQ_NORETRY;
+
fetched.LowPart = 0;
fetched.HighPart = 0;
tblocksize = ConvertLongToLargeInteger(cm_data.buf_blockSize);
length.HighPart = p4;
end = LargeIntegerAdd(base, length);
-
+
osi_Log5(afsd_logp, "Starting BKG prefetch scp 0x%p offset 0x%x:%x length 0x%x:%x",
scp, p2, p1, p4, p3);
for ( code = 0, offset = base;
- code == 0 && LargeIntegerLessThan(offset, end);
+ code == 0 && LargeIntegerLessThan(offset, end);
offset = LargeIntegerAdd(offset, tblocksize) )
{
if (rxheld) {
rxheld = 0;
}
- code = buf_Get(scp, &offset, &req, &bp);
+ code = buf_Get(scp, &offset, reqp, &bp);
if (code)
break;
lock_ObtainWrite(&scp->rw);
rxheld = 1;
}
- bp->cmFlags &= ~CM_BUF_CMBKGFETCH;
buf_Release(bp);
bp = NULL;
continue;
rxheld = 1;
}
- code = cm_GetBuffer(scp, bp, NULL, userp, &req);
+ code = cm_GetBuffer(scp, bp, NULL, userp, reqp);
if (code == 0)
- fetched = LargeIntegerAdd(fetched, tblocksize);
+ fetched = LargeIntegerAdd(fetched, tblocksize);
buf_Release(bp);
- bp->cmFlags &= ~CM_BUF_CMBKGFETCH;
}
-
+
if (!rxheld) {
lock_ObtainWrite(&scp->rw);
rxheld = 1;
}
- /* Clear flag from any remaining buffers */
- for ( ;
- LargeIntegerLessThan(offset, end);
- offset = LargeIntegerAdd(offset, tblocksize) )
- {
- bp = buf_Find(scp, &offset);
- if (bp) {
- bp->cmFlags &= ~CM_BUF_CMBKGFETCH;
- buf_Release(bp);
- }
- }
- cm_ClearPrefetchFlag(LargeIntegerGreaterThanZero(fetched) ? 0 : code,
+ cm_ClearPrefetchFlag(LargeIntegerGreaterThanZero(fetched) ? 0 : code,
scp, &base, &fetched);
/* wakeup anyone who is waiting */
osi_Log4(afsd_logp, "Ending BKG prefetch scp 0x%p code 0x%x fetched 0x%x:%x",
scp, code, fetched.HighPart, fetched.LowPart);
+
+ reqp->flags = req_flags;
return code;
}
osi_hyper_t readBase;
osi_hyper_t readLength;
osi_hyper_t readEnd;
- osi_hyper_t offset;
osi_hyper_t tblocksize; /* a long long temp variable */
- cm_buf_t *bp;
tblocksize = ConvertLongToLargeInteger(cm_data.buf_blockSize);
-
+
readBase = *offsetp;
/* round up to chunk boundary */
readBase.LowPart += (cm_chunkSize-1);
lock_ReleaseWrite(&scp->rw);
return;
}
- scp->flags |= CM_SCACHEFLAG_PREFETCHING;
+ _InterlockedOr(&scp->flags, CM_SCACHEFLAG_PREFETCHING);
/* start the scan at the latter of the end of this read or
* the end of the last fetched region.
code = cm_CheckFetchRange(scp, &readBase, &readLength, userp, reqp,
&realBase);
if (code) {
- scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
+ _InterlockedAnd(&scp->flags, ~CM_SCACHEFLAG_PREFETCHING);
lock_ReleaseWrite(&scp->rw);
return; /* can't find something to prefetch */
}
readEnd = LargeIntegerAdd(realBase, readLength);
- /*
- * Mark each buffer in the range as queued for a
- * background fetch
- */
- for ( offset = realBase;
- LargeIntegerLessThan(offset, readEnd);
- offset = LargeIntegerAdd(offset, tblocksize) )
- {
- if (rwheld) {
- lock_ReleaseWrite(&scp->rw);
- rwheld = 0;
- }
-
- bp = buf_Find(scp, &offset);
- if (!bp)
- continue;
-
- if (!rwheld) {
- lock_ObtainWrite(&scp->rw);
- rwheld = 1;
- }
-
- bp->cmFlags |= CM_BUF_CMBKGFETCH;
- buf_Release(bp);
- }
-
if (rwheld)
lock_ReleaseWrite(&scp->rw);
osi_Log2(afsd_logp, "BKG Prefetch request scp 0x%p, base 0x%x",
scp, realBase.LowPart);
- cm_QueueBKGRequest(scp, cm_BkgPrefetch,
- realBase.LowPart, realBase.HighPart,
- readLength.LowPart, readLength.HighPart,
- userp);
+ cm_QueueBKGRequest(scp, cm_BkgPrefetch,
+ realBase.LowPart, realBase.HighPart,
+ readLength.LowPart, readLength.HighPart,
+ userp, reqp);
}
/* scp must be locked; temporarily unlocked during processing.
long temp;
long code;
long flags; /* flags to cm_SyncOp */
-
+
/* clear things out */
biop->scp = scp; /* do not hold; held by caller */
+ biop->userp = userp; /* do not hold; held by caller */
+ biop->reqp = reqp;
biop->offset = *inOffsetp;
biop->length = 0;
biop->bufListp = NULL;
thyper = ConvertLongToLargeInteger(temp);
tbase = LargeIntegerAdd(*inOffsetp, thyper);
- bufp = buf_Find(scp, &tbase);
+ bufp = buf_Find(&scp->fid, &tbase);
if (bufp) {
/* get buffer mutex and scp mutex safely */
lock_ReleaseWrite(&scp->rw);
lock_ObtainWrite(&scp->rw);
flags = CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_STOREDATA | CM_SCACHESYNC_BUFLOCKED;
- code = cm_SyncOp(scp, bufp, userp, reqp, 0, flags);
+ code = cm_SyncOp(scp, bufp, userp, reqp, 0, flags);
if (code) {
lock_ReleaseMutex(&bufp->mx);
buf_Release(bufp);
bufp = NULL;
buf_UnreserveBuffers(cm_chunkSize / cm_data.buf_blockSize);
return code;
- }
-
+ }
+
/* if the buffer is dirty, we're done */
if (bufp->flags & CM_BUF_DIRTY) {
osi_assertx(!(bufp->flags & CM_BUF_WRITING),
"WRITING w/o CMSTORING in SetupStoreBIOD");
- bufp->flags |= CM_BUF_WRITING;
+ _InterlockedOr(&bufp->flags, CM_BUF_WRITING);
break;
}
lock_ReleaseMutex(&bufp->mx);
buf_Release(bufp);
bufp = NULL;
- }
+ }
}
biop->reserved = 1;
-
+
/* if we get here, if bufp is null, we didn't find any dirty buffers
* that weren't already being stored back, so we just quit now.
*/
/* don't need buffer mutex any more */
lock_ReleaseMutex(&bufp->mx);
-
+
/* put this element in the list */
qdp = osi_QDAlloc();
osi_SetQData(qdp, bufp);
+
+ if ( cm_verifyData )
+ buf_ComputeCheckSum(bufp);
+
/* don't have to hold bufp, since held by buf_Find above */
osi_QAddH((osi_queue_t **) &biop->bufListp,
(osi_queue_t **) &biop->bufListEndp,
biop->offset = firstModOffset;
bufp = NULL; /* this buffer and reference added to the queue */
- /* compute the window surrounding *inOffsetp of size cm_chunkSize */
- scanStart = *inOffsetp;
+ /* compute the window surrounding firstModOffset of size cm_chunkSize */
+ scanStart = firstModOffset;
scanStart.LowPart &= (-cm_chunkSize);
thyper = ConvertLongToLargeInteger(cm_chunkSize);
scanEnd = LargeIntegerAdd(scanStart, thyper);
flags = CM_SCACHESYNC_GETSTATUS
| CM_SCACHESYNC_STOREDATA
- | CM_SCACHESYNC_BUFLOCKED
- | CM_SCACHESYNC_NOWAIT;
+ | CM_SCACHESYNC_BUFLOCKED;
/* start by looking backwards until scanStart */
/* hyper version of cm_data.buf_blockSize */
tbase = LargeIntegerSubtract(firstModOffset, thyper);
while(LargeIntegerGreaterThanOrEqualTo(tbase, scanStart)) {
/* see if we can find the buffer */
- bufp = buf_Find(scp, &tbase);
- if (!bufp)
+ bufp = buf_Find(&scp->fid, &tbase);
+ if (!bufp)
break;
/* try to lock it, and quit if we can't (simplifies locking) */
bufp = NULL;
break;
}
-
+
code = cm_SyncOp(scp, bufp, userp, reqp, 0, flags);
if (code) {
lock_ReleaseMutex(&bufp->mx);
bufp = NULL;
break;
}
-
+
if (!(bufp->flags & CM_BUF_DIRTY)) {
/* buffer is clean, so we shouldn't add it */
cm_SyncOpDone(scp, bufp, flags);
*/
qdp = osi_QDAlloc();
osi_SetQData(qdp, bufp);
+
+ if ( cm_verifyData )
+ buf_ComputeCheckSum(bufp);
+
/* no buf_hold necessary, since we have it held from buf_Find */
osi_QAddT((osi_queue_t **) &biop->bufListp,
(osi_queue_t **) &biop->bufListEndp,
tbase = LargeIntegerAdd(firstModOffset, thyper);
while(LargeIntegerLessThan(tbase, scanEnd)) {
/* see if we can find the buffer */
- bufp = buf_Find(scp, &tbase);
- if (!bufp)
+ bufp = buf_Find(&scp->fid, &tbase);
+ if (!bufp)
break;
/* try to lock it, and quit if we can't (simplifies locking) */
bufp = NULL;
break;
}
-
+
if (!(bufp->flags & CM_BUF_DIRTY)) {
/* buffer is clean, so we shouldn't add it */
cm_SyncOpDone(scp, bufp, flags);
*/
qdp = osi_QDAlloc();
osi_SetQData(qdp, bufp);
+
+ if ( cm_verifyData )
+ buf_ComputeCheckSum(bufp);
+
/* no buf_hold necessary, since we have it held from buf_Find */
osi_QAddH((osi_queue_t **) &biop->bufListp,
(osi_queue_t **) &biop->bufListEndp,
/* update biod info describing the transfer */
biop->length += cm_data.buf_blockSize;
-
+
/* update loop pointer */
tbase = LargeIntegerAdd(tbase, thyper);
} /* while loop looking for pages following the first page we found */
-
+
/* finally, we're done */
return 0;
}
tblocksize = ConvertLongToLargeInteger(cm_data.buf_blockSize);
biop->scp = scp; /* do not hold; held by caller */
+ biop->userp = userp; /* do not hold; held by caller */
+ biop->reqp = reqp;
biop->offset = *offsetp;
/* null out the list of buffers */
biop->bufListp = biop->bufListEndp = NULL;
biop->reserved = 0;
/* first lookup the file's length, so we know when to stop */
- code = cm_SyncOp(scp, NULL, userp, reqp, 0,
+ code = cm_SyncOp(scp, NULL, userp, reqp, 0,
CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
- if (code)
+ if (code)
return code;
-
+
/* copy out size, since it may change */
fileSize = scp->serverLength;
-
+
lock_ReleaseWrite(&scp->rw);
pageBase = *offsetp;
/* first hold all buffers, since we can't hold any locks in buf_Get */
while (1) {
/* stop at chunk boundary */
- if (collected >= cm_chunkSize)
+ if (collected >= cm_chunkSize)
break;
-
+
/* see if the next page would be past EOF */
- if (LargeIntegerGreaterThanOrEqualTo(pageBase, fileSize))
+ if (LargeIntegerGreaterThanOrEqualTo(pageBase, fileSize))
break;
code = buf_Get(scp, &pageBase, reqp, &tbp);
cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
return code;
}
-
+
buf_Release(tbp);
tbp = NULL;
/* now hold all buffers, if they are still there */
while (1) {
/* stop at chunk boundary */
- if (collected >= cm_chunkSize)
+ if (collected >= cm_chunkSize)
break;
-
+
/* see if the next page would be past EOF */
- if (LargeIntegerGreaterThanOrEqualTo(pageBase, fileSize))
+ if (LargeIntegerGreaterThanOrEqualTo(pageBase, fileSize))
break;
- tbp = buf_Find(scp, &pageBase);
- if (!tbp)
+ tbp = buf_Find(&scp->fid, &pageBase);
+ if (!tbp)
break;
/* add the buffer to the list */
qdp = osi_QDAlloc();
osi_SetQData(qdp, tbp);
- osi_QAddH((osi_queue_t **)&heldBufListp,
- (osi_queue_t **)&heldBufListEndp,
+ osi_QAddH((osi_queue_t **)&heldBufListp,
+ (osi_queue_t **)&heldBufListEndp,
&qdp->q);
/* leave tbp held (from buf_Get) */
- if (!reserving)
+ if (!reserving)
break;
collected += cm_data.buf_blockSize;
}
flags = CM_SCACHESYNC_FETCHDATA | CM_SCACHESYNC_BUFLOCKED;
- if (!isFirst)
+ if (!isFirst)
flags |= CM_SCACHESYNC_NOWAIT;
/* wait for the buffer to serialize, if required. Doesn't
lock_ReleaseMutex(&tbp->mx);
break;
}
-
+
/* don't fetch over dirty buffers */
if (tbp->flags & CM_BUF_DIRTY) {
cm_SyncOpDone(scp, tbp, flags);
/* add the buffer to the list */
qdp = osi_QDAlloc();
osi_SetQData(qdp, tbp);
- osi_QAddH((osi_queue_t **)&biop->bufListp,
- (osi_queue_t **)&biop->bufListEndp,
+ osi_QAddH((osi_queue_t **)&biop->bufListp,
+ (osi_queue_t **)&biop->bufListEndp,
&qdp->q);
buf_Hold(tbp);
isFirst = 0;
collected += cm_data.buf_blockSize;
}
-
+
/* now, we've held in biop->bufListp all the buffer's we're really
* interested in. We also have holds left from heldBufListp, and we
* now release those holds on the buffers.
/* Caller expects this */
lock_ObtainWrite(&scp->rw);
-
+
/* if we got a failure setting up the first buffer, then we don't have
* any side effects yet, and we also have failed an operation that the
* caller requires to make any progress. Give up now.
buf_UnreserveBuffers(cm_chunkSize / cm_data.buf_blockSize);
return code;
}
-
+
/* otherwise, we're still OK, and should just return the I/O setup we've
* got.
*/
osi_queueData_t *qdp;
osi_queueData_t *nqdp;
int flags;
+ int reportErrorToRedir = 0;
/* Give back reserved buffers */
if (biop->reserved)
buf_UnreserveBuffers(cm_chunkSize / cm_data.buf_blockSize);
-
+
if (isStore)
flags = CM_SCACHESYNC_STOREDATA;
else
for(qdp = biop->bufListp; qdp; qdp = nqdp) {
/* lookup next guy first, since we're going to free this one */
nqdp = (osi_queueData_t *) osi_QNext(&qdp->q);
-
+
/* extract buffer and free queue data */
bufp = osi_GetQData(qdp);
osi_QRemoveHT((osi_queue_t **) &biop->bufListp,
lock_ObtainMutex(&bufp->mx);
lock_ObtainWrite(&scp->rw);
cm_SyncOpDone(scp, bufp, flags);
-
+
/* turn off writing and wakeup users */
if (isStore) {
if (bufp->flags & CM_BUF_WAITING) {
osi_Wakeup((LONG_PTR) bufp);
}
if (code) {
- bufp->flags &= ~CM_BUF_WRITING;
+ _InterlockedAnd(&bufp->flags, ~CM_BUF_WRITING);
switch (code) {
case CM_ERROR_NOSUCHFILE:
case CM_ERROR_BADFD:
/*
* Apply the fatal error to this buffer.
*/
- bufp->flags &= ~CM_BUF_DIRTY;
- bufp->flags |= CM_BUF_ERROR;
+ _InterlockedAnd(&bufp->flags, ~CM_BUF_DIRTY);
+ _InterlockedOr(&bufp->flags, CM_BUF_ERROR);
bufp->dirty_offset = 0;
bufp->dirty_length = 0;
bufp->error = code;
bufp->dataVersion = CM_BUF_VERSION_BAD;
bufp->dirtyCounter++;
+ reportErrorToRedir = 1;
break;
case CM_ERROR_TIMEDOUT:
case CM_ERROR_ALLDOWN:
break;
}
} else {
- bufp->flags &= ~(CM_BUF_WRITING | CM_BUF_DIRTY);
+ _InterlockedAnd(&bufp->flags, ~(CM_BUF_WRITING | CM_BUF_DIRTY));
bufp->dirty_offset = bufp->dirty_length = 0;
}
}
buf_Release(bufp);
bufp = NULL;
}
+
+ if (RDR_Initialized && reportErrorToRedir) {
+ DWORD status;
+ smb_MapNTError(cm_MapRPCError(code, biop->reqp), &status, TRUE);
+ RDR_SetFileStatus( &scp->fid, &biop->userp->authgroup, status);
+ }
} else {
if (!scp_locked)
lock_ObtainWrite(&scp->rw);
/* clean things out */
biop->bufListp = NULL;
biop->bufListEndp = NULL;
-}
+}
static int
cm_CloneStatus(cm_scache_t *scp, cm_user_t *userp, int scp_locked,
AFSCallBack callback;
AFSVolSync volSync;
char *bufferp;
+ afs_uint32 buffer_offset;
cm_buf_t *tbufp; /* buf we're filling */
osi_queueData_t *qdp; /* q element we're scanning */
AFSFid tfid;
memset(&volSync, 0, sizeof(volSync));
- /* now, the buffer may or may not be filled with good data (buf_GetNew
+ /* now, the buffer may or may not be filled with good data (buf_GetNewLocked
* drops lots of locks, and may indeed return a properly initialized
* buffer, although more likely it will just return a new, empty, buffer.
*/
code = cm_SetupFetchBIOD(scp, &bufp->offset, &biod, userp, reqp);
if (code) {
/* couldn't even get the first page setup properly */
- osi_Log1(afsd_logp, "GetBuffer: SetupFetchBIOD failure code %d", code);
+ osi_Log1(afsd_logp, "cm_GetBuffer: SetupFetchBIOD failure code %d", code);
return code;
}
* We can lose a race condition and end up with biod.length zero, in
* which case we just retry.
*/
- if (bufp->dataVersion <= scp->dataVersion && bufp->dataVersion >= scp->bufDataVersionLow || biod.length == 0) {
- if ((bufp->dataVersion == CM_BUF_VERSION_BAD || bufp->dataVersion < scp->bufDataVersionLow) &&
- LargeIntegerGreaterThanOrEqualTo(bufp->offset, scp->serverLength))
- {
- osi_Log4(afsd_logp, "Bad DVs 0x%x != (0x%x -> 0x%x) or length 0x%x",
- bufp->dataVersion, scp->bufDataVersionLow, scp->dataVersion, biod.length);
- if (bufp->dataVersion == CM_BUF_VERSION_BAD)
- memset(bufp->datap, 0, cm_data.buf_blockSize);
- bufp->dataVersion = scp->dataVersion;
+ if (bufp->dataVersion <= scp->dataVersion && bufp->dataVersion >= scp->bufDataVersionLow) {
+ /* We obtained the buffer while we were waiting */
+ goto release_biod;
+ }
+
+ if (biod.length == 0) {
+ osi_Log2(afsd_logp, "cm_GetBuffer BIOD length 0 scp 0x%p bufp 0x%p",
+ scp, bufp);
+ goto release_biod;
+ }
+
+ /* Check for buffers we can fill locally */
+ for (qdp = biod.bufListEndp;
+ qdp;
+ qdp = (osi_queueData_t *) osi_QPrev(&qdp->q)) {
+ tbufp = osi_GetQData(qdp);
+
+ if ( tbufp->dataVersion == CM_BUF_VERSION_BAD ||
+ tbufp->dataVersion < scp->bufDataVersionLow ||
+ tbufp->dataVersion > scp->dataVersion) {
+
+ osi_Log4(afsd_logp, "cm_GetBuffer bufp 0x%p DVs 0x%x != (0x%x -> 0x%x)",
+ tbufp, tbufp->dataVersion, scp->bufDataVersionLow, scp->dataVersion);
+
+ if (LargeIntegerGreaterThanOrEqualTo(tbufp->offset, scp->length))
+ {
+ if (tbufp->dataVersion == CM_BUF_VERSION_BAD)
+ memset(tbufp->datap, 0, cm_data.buf_blockSize);
+ tbufp->dataVersion = scp->dataVersion;
+ }
+
+ if ((scp->mask & CM_SCACHEMASK_TRUNCPOS) &&
+ LargeIntegerGreaterThanOrEqualTo(tbufp->offset, scp->truncPos)) {
+ memset(tbufp->datap, 0, cm_data.buf_blockSize);
+ tbufp->dataVersion = scp->dataVersion;
+ }
}
- cm_ReleaseBIOD(&biod, 0, 0, 1);
- return 0;
- } else if ((bufp->dataVersion == CM_BUF_VERSION_BAD || bufp->dataVersion < scp->bufDataVersionLow)
- && (scp->mask & CM_SCACHEMASK_TRUNCPOS) &&
- LargeIntegerGreaterThanOrEqualTo(bufp->offset, scp->truncPos)) {
- memset(bufp->datap, 0, cm_data.buf_blockSize);
- bufp->dataVersion = scp->dataVersion;
- cm_ReleaseBIOD(&biod, 0, 0, 1);
- return 0;
}
+ if (bufp->dataVersion <= scp->dataVersion && bufp->dataVersion >= scp->bufDataVersionLow) {
+ /* We locally populated the buffer we wanted */
+ goto release_biod;
+ }
+
+ InterlockedIncrement(&scp->activeRPCs);
lock_ReleaseWrite(&scp->rw);
scp_locked = 0;
// yj code
// if getroot then we don't need to make any calls
// just return fake data
-
+
if (cm_freelanceEnabled && getroot) {
- // setup the fake status
+ // setup the fake status
afsStatus.InterfaceVersion = 0x1;
afsStatus.FileType = 0x2;
afsStatus.LinkCount = scp->linkCount;
// once we're done setting up the status info,
// we just fill the buffer pages with fakedata
// from cm_FakeRootDir. Extra pages are set to
- // 0.
-
+ // 0.
+
lock_ObtainMutex(&cm_Freelance_Lock);
t1 = bufp->offset.LowPart;
qdp = biod.bufListEndp;
bufferp=tbufp->datap;
memset(bufferp, 0, cm_data.buf_blockSize);
t2 = cm_fakeDirSize - t1;
- if (t2> (afs_int32)cm_data.buf_blockSize)
+ if (t2> (afs_int32)cm_data.buf_blockSize)
t2=cm_data.buf_blockSize;
if (t2 > 0) {
memcpy(bufferp, cm_FakeRootDir+t1, t2);
}
lock_ReleaseMutex(&cm_Freelance_Lock);
-
+
// once we're done, we skip over the part of the
// code that does the ACTUAL fetching of data for
// real files
* the network round trip by allocating zeroed buffers and
* faking the status info.
*/
- if (biod.offset.QuadPart >= scp->length.QuadPart) {
+ if (biod.offset.QuadPart >= scp->serverLength.QuadPart ||
+ ((scp->mask & CM_SCACHEMASK_TRUNCPOS) && biod.offset.QuadPart > scp->truncPos.QuadPart)) {
osi_Log5(afsd_logp, "SKIP FetchData64 scp 0x%p, off 0x%x:%08x > length 0x%x:%08x",
scp, biod.offset.HighPart, biod.offset.LowPart,
scp->length.HighPart, scp->length.LowPart);
/* now make the call */
do {
code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
- if (code)
+ if (code)
continue;
rxconnp = cm_GetRxConn(connp);
rxcallp = rx_NewCall(rxconnp);
rx_PutConnection(rxconnp);
-#ifdef AFS_LARGEFILES
nbytes = nbytes_hi = 0;
if (SERVERHAS64BIT(connp)) {
nbytes_hi = ntohl(nbytes_hi);
} else {
nbytes_hi = 0;
- code = rxcallp->error;
+ code = rx_Error(rxcallp);
code1 = rx_EndCall(rxcallp, code);
rxcallp = NULL;
}
}
} else {
osi_Log1(afsd_logp, "cm_GetBuffer rx_Read32 returns %d != 4", temp);
- code = (rxcallp->error < 0) ? rxcallp->error : RX_PROTOCOL_ERROR;
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
}
}
/* for the moment, nbytes_hi will always be 0 if code == 0
because biod.length is a 32-bit quantity. */
-#else
- osi_Log3(afsd_logp, "CALL FetchData scp 0x%p, off 0x%x, size 0x%x",
- scp, biod.offset.LowPart, biod.length);
-
- code = StartRXAFS_FetchData(rxcallp, &tfid, biod.offset.LowPart,
- biod.length);
-
- /* now copy the data out of the pipe and put it in the buffer */
- if (code == 0) {
- temp = rx_Read32(rxcallp, &nbytes);
- if (temp == sizeof(afs_int32)) {
- length_found = ntohl(nbytes);
- if (length_found > biod.length) {
- /*
- * prior to 1.4.12 and 1.5.65 the file server would return
- * (filesize - offset) if the requested offset was greater than
- * the filesize. The correct return value would have been zero.
- * Force a retry by returning an RX_PROTOCOL_ERROR. If the cause
- * is a race between two RPCs issues by this cache manager, the
- * correct thing will happen the second time.
- */
- osi_Log0(afsd_logp, "cm_GetBuffer length_found > biod.length");
- fs_fetchdata_offset_bug = 1;
- }
- }
- else {
- osi_Log1(afsd_logp, "cm_GetBuffer rx_Read32 returns %d != 4", temp);
- code = (rxcallp->error < 0) ? rxcallp->error : RX_PROTOCOL_ERROR;
- }
- }
-#endif
if (code == 0) {
qdp = biod.bufListEndp;
if (qdp) {
tbufp = osi_GetQData(qdp);
bufferp = tbufp->datap;
+ buffer_offset = 0;
}
- else
+ else
bufferp = NULL;
+
/* fill length_found of data from the pipe into the pages.
* When we stop, qdp will point at the last page we're
* dealing with, and bufferp will tell us where we
* clear later pages out, if we fetch past EOF).
*/
while (length_found > 0) {
+#ifdef USE_RX_IOVEC
+ struct iovec tiov[RX_MAXIOVECS];
+ afs_int32 tnio, iov, iov_offset;
+
+ temp = rx_Readv(rxcallp, tiov, &tnio, RX_MAXIOVECS, length_found);
+ osi_Log1(afsd_logp, "cm_GetBuffer rx_Readv returns %d", temp);
+ if (temp != length_found && temp < cm_data.buf_blockSize) {
+ /*
+ * If the file server returned (filesize - offset),
+ * then the first rx_Read will return zero octets of data.
+ * If it does, do not treat it as an error. Correct the
+ * length_found and continue as if the file server said
+ * it was sending us zero octets of data.
+ */
+ if (fs_fetchdata_offset_bug && first_read)
+ length_found = 0;
+ else
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ break;
+ }
+
+ iov = 0;
+ iov_offset = 0;
+ rbytes = temp;
+
+ while (rbytes > 0) {
+ afs_int32 len;
+
+ osi_assertx(bufferp != NULL, "null cm_buf_t");
+
+ len = min(tiov[iov].iov_len - iov_offset, cm_data.buf_blockSize - buffer_offset);
+ memcpy(bufferp + buffer_offset, tiov[iov].iov_base + iov_offset, len);
+ iov_offset += len;
+ buffer_offset += len;
+ rbytes -= len;
+
+ if (iov_offset == tiov[iov].iov_len) {
+ iov++;
+ iov_offset = 0;
+ }
+
+ if (buffer_offset == cm_data.buf_blockSize) {
+ /* allow read-while-fetching.
+ * if this is the last buffer, clear the
+ * PREFETCHING flag, so the reader waiting for
+ * this buffer will start a prefetch.
+ */
+ _InterlockedOr(&tbufp->cmFlags, CM_BUF_CMFULLYFETCHED);
+ lock_ObtainWrite(&scp->rw);
+ if (scp->flags & CM_SCACHEFLAG_WAITING) {
+ osi_Log1(afsd_logp, "CM GetBuffer Waking scp 0x%p", scp);
+ osi_Wakeup((LONG_PTR) &scp->flags);
+ }
+ if (cpffp && !*cpffp && !osi_QPrev(&qdp->q)) {
+ osi_hyper_t tlength = ConvertLongToLargeInteger(biod.length);
+ *cpffp = 1;
+ cm_ClearPrefetchFlag(0, scp, &biod.offset, &tlength);
+ }
+ lock_ReleaseWrite(&scp->rw);
+
+ /* Advance the buffer */
+ qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
+ if (qdp) {
+ tbufp = osi_GetQData(qdp);
+ bufferp = tbufp->datap;
+ buffer_offset = 0;
+ }
+ else
+ bufferp = NULL;
+ }
+ }
+
+ length_found -= temp;
+#else /* USE_RX_IOVEC */
/* assert that there are still more buffers;
* our check above for length_found being less than
* biod.length should ensure this.
if (fs_fetchdata_offset_bug && first_read)
length_found = 0;
else
- code = (rxcallp->error < 0) ? rxcallp->error : RX_PROTOCOL_ERROR;
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
break;
}
first_read = 0;
* PREFETCHING flag, so the reader waiting for
* this buffer will start a prefetch.
*/
- tbufp->cmFlags |= CM_BUF_CMFULLYFETCHED;
+ _InterlockedOr(&tbufp->cmFlags, CM_BUF_CMFULLYFETCHED);
lock_ObtainWrite(&scp->rw);
if (scp->flags & CM_SCACHEFLAG_WAITING) {
osi_Log1(afsd_logp, "CM GetBuffer Waking scp 0x%p", scp);
tbufp = osi_GetQData(qdp);
bufferp = tbufp->datap;
}
- else
+ else
bufferp = NULL;
- } else
+ } else
bufferp += temp;
+#endif /* USE_RX_IOVEC */
}
/* zero out remainder of last pages, in case we are
* a page. Zero the remainder of that page, and then
* all of the rest of the pages.
*/
+#ifdef USE_RX_IOVEC
+ rbytes = cm_data.buf_blockSize - buffer_offset;
+ bufferp = tbufp->datap + buffer_offset;
+#else /* USE_RX_IOVEC */
/* bytes fetched */
osi_assertx((bufferp - tbufp->datap) < LONG_MAX, "data >= LONG_MAX");
rbytes = (long) (bufferp - tbufp->datap);
/* bytes left to zero */
rbytes = cm_data.buf_blockSize - rbytes;
+#endif /* USE_RX_IOVEC */
while(qdp) {
if (rbytes != 0)
memset(bufferp, 0, rbytes);
qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
- if (qdp == NULL)
+ if (qdp == NULL)
break;
tbufp = osi_GetQData(qdp);
bufferp = tbufp->datap;
/* bytes to clear in this page */
rbytes = cm_data.buf_blockSize;
- }
+ }
}
if (code == 0) {
code = code1;
osi_Log0(afsd_logp, "CALL FetchData DONE");
- } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync, NULL, NULL, code));
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, 0, &volSync, NULL, NULL, code));
fetchingcompleted:
code = cm_MapRPCError(code, reqp);
if (!scp_locked)
lock_ObtainWrite(&scp->rw);
-
+
/* we know that no one else has changed the buffer, since we still have
* the fetching flag on the buffers, and we have the scp locked again.
* Copy in the version # into the buffer if we got code 0 back from the
}
}
+ if (code == 0)
+ cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, CM_MERGEFLAG_FETCHDATA);
+ else
+ InterlockedDecrement(&scp->activeRPCs);
+
+ release_biod:
/* release scatter/gather I/O structure (buffers, locks) */
cm_ReleaseBIOD(&biod, 0, code, 1);
- if (code == 0)
- cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, 0);
-
return code;
}
+
+/*
+ * Similar to cm_GetBuffer but doesn't use an allocated cm_buf_t object.
+ * Instead the data is read from the file server and copied directly into
+ * a provided buffer. Called with scp locked. The scp is locked on return.
+ */
+long cm_GetData(cm_scache_t *scp, osi_hyper_t *offsetp, char *datap, int data_length,
+ cm_user_t *userp, cm_req_t *reqp)
+{
+ long code=0, code1=0;
+ afs_uint32 nbytes; /* bytes in transfer */
+ afs_uint32 nbytes_hi = 0; /* high-order 32 bits of bytes in transfer */
+ afs_uint64 length_found = 0;
+ char *bufferp = datap;
+ afs_uint32 buffer_offset = 0;
+ long rbytes; /* bytes in rx_Read call */
+ long temp;
+ AFSFetchStatus afsStatus;
+ AFSCallBack callback;
+ AFSVolSync volSync;
+ AFSFid tfid;
+ struct rx_call *rxcallp;
+ struct rx_connection *rxconnp;
+ cm_conn_t *connp;
+ int getroot;
+ afs_int32 t1,t2;
+ int require_64bit_ops = 0;
+ int call_was_64bit = 0;
+ int fs_fetchdata_offset_bug = 0;
+ int first_read = 1;
+ int scp_locked = 1;
+
+ memset(&volSync, 0, sizeof(volSync));
+
+ /* now, the buffer may or may not be filled with good data (buf_GetNewLocked
+ * drops lots of locks, and may indeed return a properly initialized
+ * buffer, although more likely it will just return a new, empty, buffer.
+ */
+
+#ifdef AFS_FREELANCE_CLIENT
+
+ // yj: if they're trying to get the /afs directory, we need to
+ // handle it differently, since it's local rather than on any
+ // server
+
+ getroot = (scp==cm_data.rootSCachep);
+ if (getroot)
+ osi_Log1(afsd_logp,"GetBuffer returns cm_data.rootSCachep=%x",cm_data.rootSCachep);
+#endif
+
+ cm_AFSFidFromFid(&tfid, &scp->fid);
+
+ if (LargeIntegerGreaterThan(LargeIntegerAdd(*offsetp,
+ ConvertLongToLargeInteger(data_length)),
+ ConvertLongToLargeInteger(LONG_MAX))) {
+ require_64bit_ops = 1;
+ }
+
+ InterlockedIncrement(&scp->activeRPCs);
+ osi_Log2(afsd_logp, "cm_GetData: fetching data scp %p DV 0x%x", scp, scp->dataVersion);
+
+#ifdef AFS_FREELANCE_CLIENT
+
+ // yj code
+ // if getroot then we don't need to make any calls
+ // just return fake data
+
+ if (cm_freelanceEnabled && getroot) {
+ // setup the fake status
+ afsStatus.InterfaceVersion = 0x1;
+ afsStatus.FileType = 0x2;
+ afsStatus.LinkCount = scp->linkCount;
+ afsStatus.Length = cm_fakeDirSize;
+ afsStatus.DataVersion = (afs_uint32)(cm_data.fakeDirVersion & 0xFFFFFFFF);
+ afsStatus.Author = 0x1;
+ afsStatus.Owner = 0x0;
+ afsStatus.CallerAccess = 0x9;
+ afsStatus.AnonymousAccess = 0x9;
+ afsStatus.UnixModeBits = 0x1ff;
+ afsStatus.ParentVnode = 0x1;
+ afsStatus.ParentUnique = 0x1;
+ afsStatus.ResidencyMask = 0;
+ afsStatus.ClientModTime = (afs_uint32)FakeFreelanceModTime;
+ afsStatus.ServerModTime = (afs_uint32)FakeFreelanceModTime;
+ afsStatus.Group = 0;
+ afsStatus.SyncCounter = 0;
+ afsStatus.dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
+ afsStatus.lockCount = 0;
+ afsStatus.Length_hi = 0;
+ afsStatus.errorCode = 0;
+ memset(&volSync, 0, sizeof(volSync));
+
+ // once we're done setting up the status info,
+ // we just fill the buffer pages with fakedata
+ // from cm_FakeRootDir. Extra pages are set to
+ // 0.
+
+ lock_ObtainMutex(&cm_Freelance_Lock);
+ t1 = offsetp->LowPart;
+ memset(datap, 0, data_length);
+ t2 = cm_fakeDirSize - t1;
+ if (t2 > data_length)
+ t2 = data_length;
+ if (t2 > 0)
+ memcpy(datap, cm_FakeRootDir+t1, t2);
+ lock_ReleaseMutex(&cm_Freelance_Lock);
+
+ // once we're done, we skip over the part of the
+ // code that does the ACTUAL fetching of data for
+ // real files
+
+ goto fetchingcompleted;
+ }
+
+#endif /* AFS_FREELANCE_CLIENT */
+
+ if (scp_locked) {
+ lock_ReleaseWrite(&scp->rw);
+ scp_locked = 0;
+ }
+
+ /* now make the call */
+ do {
+ code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ rxconnp = cm_GetRxConn(connp);
+ rxcallp = rx_NewCall(rxconnp);
+ rx_PutConnection(rxconnp);
+
+ nbytes = nbytes_hi = 0;
+
+ if (SERVERHAS64BIT(connp)) {
+ call_was_64bit = 1;
+
+ osi_Log4(afsd_logp, "CALL FetchData64 scp 0x%p, off 0x%x:%08x, size 0x%x",
+ scp, offsetp->HighPart, offsetp->LowPart, data_length);
+
+ code = StartRXAFS_FetchData64(rxcallp, &tfid, offsetp->QuadPart, data_length);
+
+ if (code == 0) {
+ temp = rx_Read32(rxcallp, &nbytes_hi);
+ if (temp == sizeof(afs_int32)) {
+ nbytes_hi = ntohl(nbytes_hi);
+ } else {
+ nbytes_hi = 0;
+ code = rx_Error(rxcallp);
+ code1 = rx_EndCall(rxcallp, code);
+ rxcallp = NULL;
+ }
+ }
+ } else {
+ call_was_64bit = 0;
+ }
+
+ if (code == RXGEN_OPCODE || !SERVERHAS64BIT(connp)) {
+ if (require_64bit_ops) {
+ osi_Log0(afsd_logp, "Skipping FetchData. Operation requires FetchData64");
+ code = CM_ERROR_TOOBIG;
+ } else {
+ if (!rxcallp) {
+ rxconnp = cm_GetRxConn(connp);
+ rxcallp = rx_NewCall(rxconnp);
+ rx_PutConnection(rxconnp);
+ }
+
+ osi_Log3(afsd_logp, "CALL FetchData scp 0x%p, off 0x%x, size 0x%x",
+ scp, offsetp->LowPart, data_length);
+
+ code = StartRXAFS_FetchData(rxcallp, &tfid, offsetp->LowPart, data_length);
+
+ SET_SERVERHASNO64BIT(connp);
+ }
+ }
+
+ if (code == 0) {
+ temp = rx_Read32(rxcallp, &nbytes);
+ if (temp == sizeof(afs_int32)) {
+ nbytes = ntohl(nbytes);
+ FillInt64(length_found, nbytes_hi, nbytes);
+ if (length_found > data_length) {
+ /*
+ * prior to 1.4.12 and 1.5.65 the file server would return
+ * (filesize - offset) if the requested offset was greater than
+ * the filesize. The correct return value would have been zero.
+ * Force a retry by returning an RX_PROTOCOL_ERROR. If the cause
+ * is a race between two RPCs issues by this cache manager, the
+ * correct thing will happen the second time.
+ */
+ osi_Log0(afsd_logp, "cm_GetData length_found > data_length");
+ fs_fetchdata_offset_bug = 1;
+ }
+ } else {
+ osi_Log1(afsd_logp, "cm_GetData rx_Read32 returns %d != 4", temp);
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ }
+ }
+ /* for the moment, nbytes_hi will always be 0 if code == 0
+ because data_length is a 32-bit quantity. */
+
+ if (code == 0) {
+ /* fill length_found of data from the pipe into the pages.
+ * When we stop, qdp will point at the last page we're
+ * dealing with, and bufferp will tell us where we
+ * stopped. We'll need this info below when we clear
+ * the remainder of the last page out (and potentially
+ * clear later pages out, if we fetch past EOF).
+ */
+ while (length_found > 0) {
+#ifdef USE_RX_IOVEC
+ struct iovec tiov[RX_MAXIOVECS];
+ afs_int32 tnio, iov, iov_offset;
+
+ temp = rx_Readv(rxcallp, tiov, &tnio, RX_MAXIOVECS, length_found);
+ osi_Log1(afsd_logp, "cm_GetData rx_Readv returns %d", temp);
+ if (temp != length_found && temp < data_length) {
+ /*
+ * If the file server returned (filesize - offset),
+ * then the first rx_Read will return zero octets of data.
+ * If it does, do not treat it as an error. Correct the
+ * length_found and continue as if the file server said
+ * it was sending us zero octets of data.
+ */
+ if (fs_fetchdata_offset_bug && first_read)
+ length_found = 0;
+ else
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ break;
+ }
+
+ iov = 0;
+ iov_offset = 0;
+ rbytes = temp;
+
+ while (rbytes > 0) {
+ afs_int32 len;
+
+ osi_assertx(bufferp != NULL, "null cm_buf_t");
+
+ len = min(tiov[iov].iov_len - iov_offset, data_length - buffer_offset);
+ memcpy(bufferp + buffer_offset, tiov[iov].iov_base + iov_offset, len);
+ iov_offset += len;
+ buffer_offset += len;
+ rbytes -= len;
+
+ if (iov_offset == tiov[iov].iov_len) {
+ iov++;
+ iov_offset = 0;
+ }
+ }
+
+ length_found -= temp;
+#else /* USE_RX_IOVEC */
+ /* assert that there are still more buffers;
+ * our check above for length_found being less than
+ * data_length should ensure this.
+ */
+ osi_assertx(bufferp != NULL, "null cm_buf_t");
+
+ /* read rbytes of data */
+ rbytes = (afs_uint32)(length_found > data_length ? data_length : length_found);
+ temp = rx_Read(rxcallp, bufferp, rbytes);
+ if (temp < rbytes) {
+ /*
+ * If the file server returned (filesize - offset),
+ * then the first rx_Read will return zero octets of data.
+ * If it does, do not treat it as an error. Correct the
+ * length_found and continue as if the file server said
+ * it was sending us zero octets of data.
+ */
+ if (fs_fetchdata_offset_bug && first_read)
+ length_found = 0;
+ else
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ break;
+ }
+ first_read = 0;
+
+ /* and adjust counters */
+ length_found -= temp;
+#endif /* USE_RX_IOVEC */
+ }
+
+ /* zero out remainder of last pages, in case we are
+ * fetching past EOF. We were fetching an integral #
+ * of pages, but stopped, potentially in the middle of
+ * a page. Zero the remainder of that page, and then
+ * all of the rest of the pages.
+ */
+#ifdef USE_RX_IOVEC
+ rbytes = data_length - buffer_offset;
+ bufferp = datap + buffer_offset;
+#else /* USE_RX_IOVEC */
+ /* bytes fetched */
+ osi_assertx((bufferp - datap) < LONG_MAX, "data >= LONG_MAX");
+ rbytes = (long) (bufferp - datap);
+
+ /* bytes left to zero */
+ rbytes = data_length - rbytes;
+#endif /* USE_RX_IOVEC */
+ if (rbytes != 0)
+ memset(bufferp, 0, rbytes);
+ }
+
+ if (code == 0) {
+ if (call_was_64bit)
+ code = EndRXAFS_FetchData64(rxcallp, &afsStatus, &callback, &volSync);
+ else
+ code = EndRXAFS_FetchData(rxcallp, &afsStatus, &callback, &volSync);
+ } else {
+ if (call_was_64bit)
+ osi_Log1(afsd_logp, "CALL EndRXAFS_FetchData64 skipped due to error %d", code);
+ else
+ osi_Log1(afsd_logp, "CALL EndRXAFS_FetchData skipped due to error %d", code);
+ }
+
+ if (rxcallp)
+ code1 = rx_EndCall(rxcallp, code);
+
+ if (code1 == RXKADUNKNOWNKEY)
+ osi_Log0(afsd_logp, "CALL EndCall returns RXKADUNKNOWNKEY");
+
+ /* If we are avoiding a file server bug, ignore the error state */
+ if (fs_fetchdata_offset_bug && first_read && length_found == 0 && code == -451) {
+ /* Clone the current status info and clear the error state */
+ scp_locked = cm_CloneStatus(scp, userp, scp_locked, &afsStatus, &volSync);
+ if (scp_locked) {
+ lock_ReleaseWrite(&scp->rw);
+ scp_locked = 0;
+ }
+ code = 0;
+ /* Prefer the error value from FetchData over rx_EndCall */
+ } else if (code == 0 && code1 != 0)
+ code = code1;
+ osi_Log0(afsd_logp, "CALL FetchData DONE");
+
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, 0, &volSync, NULL, NULL, code));
+
+ fetchingcompleted:
+ code = cm_MapRPCError(code, reqp);
+
+ if (!scp_locked)
+ lock_ObtainWrite(&scp->rw);
+
+ if (code == 0)
+ cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, CM_MERGEFLAG_FETCHDATA);
+ else
+ InterlockedDecrement(&scp->activeRPCs);
+
+ return code;
+}
+
+/*
+ * cm_VerifyStoreData. Function passed a rw locked cm_scache_t and a store data biod.
+ *
+ * Return 1 if the data verifies; 0 if not.
+ */
+
+long
+cm_VerifyStoreData(cm_bulkIO_t *biod, cm_scache_t *savedScp)
+{
+ long code=0, code1=0;
+ afs_uint32 nbytes; /* bytes in transfer */
+ afs_uint32 nbytes_hi = 0; /* high-order 32 bits of bytes in transfer */
+ afs_uint64 length_found = 0;
+ long rbytes; /* bytes in rx_Read call */
+ long temp;
+ AFSFetchStatus afsStatus;
+ AFSCallBack callback;
+ AFSVolSync volSync;
+ AFSFid tfid;
+ struct rx_call *rxcallp;
+ struct rx_connection *rxconnp;
+ cm_conn_t *connp;
+ int require_64bit_ops = 0;
+ int call_was_64bit = 0;
+ int fs_fetchdata_offset_bug = 0;
+ int first_read = 1;
+ int scp_locked = 1;
+ char * bufferp = malloc(biod->length);
+ long verified = 0;
+ cm_scache_t *scp = biod->scp;
+ cm_user_t *userp = biod->userp;
+ cm_req_t *reqp = biod->reqp;
+ afs_uint64 dataVersion = scp->dataVersion;
+
+ memset(&volSync, 0, sizeof(volSync));
+ memset(bufferp, 0, biod->length);
+
+ cm_AFSFidFromFid(&tfid, &scp->fid);
+
+ if (LargeIntegerGreaterThan(LargeIntegerAdd(biod->offset,
+ ConvertLongToLargeInteger(biod->length)),
+ ConvertLongToLargeInteger(LONG_MAX))) {
+ require_64bit_ops = 1;
+ }
+
+ InterlockedIncrement(&scp->activeRPCs);
+ osi_Log2(afsd_logp, "cm_VerifyStoreData: fetching data scp %p DV 0x%x", scp, scp->dataVersion);
+
+ if (scp_locked) {
+ lock_ReleaseWrite(&scp->rw);
+ scp_locked = 0;
+ }
+
+ /* now make the call */
+ do {
+ code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ rxconnp = cm_GetRxConn(connp);
+ rxcallp = rx_NewCall(rxconnp);
+ rx_PutConnection(rxconnp);
+
+ nbytes = nbytes_hi = 0;
+
+ if (SERVERHAS64BIT(connp)) {
+ call_was_64bit = 1;
+
+ osi_Log4(afsd_logp, "CALL FetchData64 scp 0x%p, off 0x%x:%08x, size 0x%x",
+ scp, biod->offset.HighPart, biod->offset.LowPart, biod->length);
+
+ code = StartRXAFS_FetchData64(rxcallp, &tfid, biod->offset.QuadPart, biod->length);
+
+ if (code == 0) {
+ temp = rx_Read32(rxcallp, &nbytes_hi);
+ if (temp == sizeof(afs_int32)) {
+ nbytes_hi = ntohl(nbytes_hi);
+ } else {
+ nbytes_hi = 0;
+ code = rx_Error(rxcallp);
+ code1 = rx_EndCall(rxcallp, code);
+ rxcallp = NULL;
+ }
+ }
+ } else {
+ call_was_64bit = 0;
+ }
+
+ if (code == RXGEN_OPCODE || !SERVERHAS64BIT(connp)) {
+ if (require_64bit_ops) {
+ osi_Log0(afsd_logp, "Skipping FetchData. Operation requires FetchData64");
+ code = CM_ERROR_TOOBIG;
+ } else {
+ if (!rxcallp) {
+ rxconnp = cm_GetRxConn(connp);
+ rxcallp = rx_NewCall(rxconnp);
+ rx_PutConnection(rxconnp);
+ }
+
+ osi_Log3(afsd_logp, "CALL FetchData scp 0x%p, off 0x%x, size 0x%x",
+ scp, biod->offset.LowPart, biod->length);
+
+ code = StartRXAFS_FetchData(rxcallp, &tfid, biod->offset.LowPart, biod->length);
+
+ SET_SERVERHASNO64BIT(connp);
+ }
+ }
+
+ if (code == 0) {
+ temp = rx_Read32(rxcallp, &nbytes);
+ if (temp == sizeof(afs_int32)) {
+ nbytes = ntohl(nbytes);
+ FillInt64(length_found, nbytes_hi, nbytes);
+ if (length_found > biod->length) {
+ /*
+ * prior to 1.4.12 and 1.5.65 the file server would return
+ * (filesize - offset) if the requested offset was greater than
+ * the filesize. The correct return value would have been zero.
+ * Force a retry by returning an RX_PROTOCOL_ERROR. If the cause
+ * is a race between two RPCs issues by this cache manager, the
+ * correct thing will happen the second time.
+ */
+ osi_Log0(afsd_logp, "cm_GetData length_found > biod.length");
+ fs_fetchdata_offset_bug = 1;
+ }
+ } else {
+ osi_Log1(afsd_logp, "cm_GetData rx_Read32 returns %d != 4", temp);
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ }
+ }
+ /* for the moment, nbytes_hi will always be 0 if code == 0
+ because data_length is a 32-bit quantity. */
+
+ if (code == 0) {
+ /* fill length_found of data from the pipe into the pages.
+ * When we stop, qdp will point at the last page we're
+ * dealing with, and bufferp will tell us where we
+ * stopped. We'll need this info below when we clear
+ * the remainder of the last page out (and potentially
+ * clear later pages out, if we fetch past EOF).
+ */
+ while (length_found > 0) {
+ /* assert that there are still more buffers;
+ * our check above for length_found being less than
+ * data_length should ensure this.
+ */
+ osi_assertx(bufferp != NULL, "null cm_buf_t");
+
+ /* read rbytes of data */
+ rbytes = (afs_uint32)(length_found > biod->length ? biod->length : length_found);
+ temp = rx_Read(rxcallp, bufferp, rbytes);
+ if (temp < rbytes) {
+ /*
+ * If the file server returned (filesize - offset),
+ * then the first rx_Read will return zero octets of data.
+ * If it does, do not treat it as an error. Correct the
+ * length_found and continue as if the file server said
+ * it was sending us zero octets of data.
+ */
+ if (fs_fetchdata_offset_bug && first_read)
+ length_found = 0;
+ else
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ break;
+ }
+ first_read = 0;
+
+ /* and adjust counters */
+ length_found -= temp;
+ }
+ }
+
+ if (code == 0) {
+ if (call_was_64bit)
+ code = EndRXAFS_FetchData64(rxcallp, &afsStatus, &callback, &volSync);
+ else
+ code = EndRXAFS_FetchData(rxcallp, &afsStatus, &callback, &volSync);
+ } else {
+ if (call_was_64bit)
+ osi_Log1(afsd_logp, "CALL EndRXAFS_FetchData64 skipped due to error %d", code);
+ else
+ osi_Log1(afsd_logp, "CALL EndRXAFS_FetchData skipped due to error %d", code);
+ }
+
+ if (rxcallp)
+ code1 = rx_EndCall(rxcallp, code);
+
+ if (code1 == RXKADUNKNOWNKEY)
+ osi_Log0(afsd_logp, "CALL EndCall returns RXKADUNKNOWNKEY");
+
+ /* If we are avoiding a file server bug, ignore the error state */
+ if (fs_fetchdata_offset_bug && first_read && length_found == 0 && code == -451) {
+ /* Clone the current status info and clear the error state */
+ scp_locked = cm_CloneStatus(scp, userp, scp_locked, &afsStatus, &volSync);
+ if (scp_locked) {
+ lock_ReleaseWrite(&scp->rw);
+ scp_locked = 0;
+ }
+ code = 0;
+ /* Prefer the error value from FetchData over rx_EndCall */
+ } else if (code == 0 && code1 != 0)
+ code = code1;
+ osi_Log0(afsd_logp, "CALL FetchData DONE");
+
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, 0, &volSync, NULL, NULL, code));
+
+ fetchingcompleted:
+ code = cm_MapRPCError(code, reqp);
+
+ if (!scp_locked)
+ lock_ObtainWrite(&scp->rw);
+
+ if (code == 0)
+ cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, CM_MERGEFLAG_FETCHDATA);
+ else
+ InterlockedDecrement(&scp->activeRPCs);
+
+ if (code == 0)
+ {
+ if (dataVersion == scp->dataVersion)
+ {
+ osi_queueData_t *qdp = NULL;
+ cm_buf_t *bufp;
+ afs_uint32 buf_offset;
+ afs_uint32 bytes_compared = 0;
+ afs_uint32 cmp_length;
+ int md5_match = 1;
+
+ verified = 1;
+
+ while ( bytes_compared < biod->length )
+ {
+ if (qdp == NULL) {
+ qdp = biod->bufListEndp;
+ buf_offset = biod->offset.LowPart % cm_data.buf_blockSize;
+ } else {
+ qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
+ buf_offset = 0;
+ }
+ cmp_length = cm_data.buf_blockSize - buf_offset;
+
+ osi_assertx(qdp != NULL, "null osi_queueData_t");
+ bufp = osi_GetQData(qdp);
+
+ if (memcmp(bufferp+bytes_compared, bufp->datap+buf_offset, cmp_length) != 0)
+ {
+ verified = 0;
+ md5_match = buf_ValidateCheckSum(bufp);
+
+ osi_Log5(afsd_logp, "cm_VerifyDataStore verification failed scp 0x%p bufp 0x%p offset 0x%x:%08x md5 %s",
+ scp, bufp, bufp->offset.HighPart, bufp->offset.LowPart, md5_match ? "match" : "no-match");
+ }
+ bytes_compared += cmp_length;
+ }
+ } else {
+ osi_Log4(afsd_logp, "cm_VerifyStoreData unable to verify due to data version change scp 0x%p, off 0x%x:%08x, size 0x%x",
+ scp, biod->offset.HighPart, biod->offset.LowPart, biod->length);
+ }
+ }
+
+ if (bufferp)
+ free(bufferp);
+
+ return verified;
+}
git://git.openafs.org / openafs.git / blobdiff