#include <winsock2.h>
#include <nb30.h>
#endif /* !DJGPP */
+#ifdef COMMENT
#include <malloc.h>
+#endif
#include <string.h>
#include <stdlib.h>
#include <osi.h>
* or when holding or releasing a vnode pointer.
*/
long cm_BufWrite(void *vfidp, osi_hyper_t *offsetp, long length, long flags,
- cm_user_t *userp, cm_req_t *reqp)
+ 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.
- */
- long code;
- cm_fid_t *fidp = vfidp;
+ /* 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.
+ */
+ long code;
+ cm_fid_t *fidp = vfidp;
cm_scache_t *scp;
long nbytes;
long temp;
* drops lots of locks, and may indeed return a properly initialized
* buffer, although more likely it will just return a new, empty, buffer.
*/
- scp = cm_FindSCache(fidp);
- if (scp == NULL)
- return CM_ERROR_NOSUCHFILE; /* shouldn't happen */
+ scp = cm_FindSCache(fidp);
+ if (scp == NULL)
+ return CM_ERROR_NOSUCHFILE; /* shouldn't happen */
- cm_AFSFidFromFid(&tfid, fidp);
+ cm_AFSFidFromFid(&tfid, fidp);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainMutex(&scp->mx);
code = cm_SetupStoreBIOD(scp, offsetp, length, &biod, userp, reqp);
if (code) {
- osi_Log1(afsd_logp, "cm_SetupStoreBIOD code %x", code);
- lock_ReleaseMutex(&scp->mx);
- cm_ReleaseSCache(scp);
+ osi_Log1(afsd_logp, "cm_SetupStoreBIOD code %x", code);
+ lock_ReleaseMutex(&scp->mx);
+ cm_ReleaseSCache(scp);
return code;
}
- if (biod.length == 0) {
- osi_Log0(afsd_logp, "cm_SetupStoreBIOD length 0");
- lock_ReleaseMutex(&scp->mx);
- cm_ReleaseBIOD(&biod, 1); /* should be a NOOP */
- cm_ReleaseSCache(scp);
+ if (biod.length == 0) {
+ osi_Log0(afsd_logp, "cm_SetupStoreBIOD length 0");
+ lock_ReleaseMutex(&scp->mx);
+ cm_ReleaseBIOD(&biod, 1); /* should be a NOOP */
+ cm_ReleaseSCache(scp);
return 0;
- }
+ }
- /* Serialize StoreData RPC's; for rationale see cm_scache.c */
- (void) cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA_EXCL);
+ /* 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 */
- scp->mask |= CM_SCACHEMASK_CLIENTMODTIME;
+ /* prepare the output status for the store */
+ scp->mask |= CM_SCACHEMASK_CLIENTMODTIME;
cm_StatusFromAttr(&inStatus, scp, NULL);
truncPos = scp->length.LowPart;
if ((scp->mask & CM_SCACHEMASK_TRUNCPOS)
truncPos = scp->truncPos.LowPart;
scp->mask &= ~CM_SCACHEMASK_TRUNCPOS;
- /* compute how many bytes to write from this buffer */
+ /* compute how many bytes to write from this buffer */
thyper = LargeIntegerSubtract(scp->length, biod.offset);
if (LargeIntegerLessThanZero(thyper)) {
- /* entire buffer is past EOF */
- nbytes = 0;
+ /* entire buffer is past EOF */
+ nbytes = 0;
}
else {
- /* otherwise write out part of buffer before EOF, but not
+ /* otherwise write out part of buffer before EOF, but not
* more than bufferSize bytes.
*/
- nbytes = thyper.LowPart;
+ nbytes = thyper.LowPart;
if (nbytes > biod.length)
nbytes = biod.length;
}
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseMutex(&scp->mx);
/* now we're ready to do the store operation */
do {
- code = cm_Conn(&scp->fid, userp, reqp, &connp);
+ code = cm_Conn(&scp->fid, userp, reqp, &connp);
if (code)
continue;
- callp = rx_NewCall(connp->callp);
+ lock_ObtainMutex(&connp->mx);
+ callp = rx_NewCall(connp->callp);
+ lock_ReleaseMutex(&connp->mx);
- osi_Log3(afsd_logp, "CALL StoreData vp %x, off 0x%x, size 0x%x",
+ osi_Log3(afsd_logp, "CALL StoreData vp %x, off 0x%x, size 0x%x",
(long) scp, biod.offset.LowPart, nbytes);
code = StartRXAFS_StoreData(callp, &tfid, &inStatus,
biod.offset.LowPart, nbytes, truncPos);
- if (code == 0) {
+ if (code == 0) {
/* write the data from the the list of buffers */
qdp = NULL;
- while(nbytes > 0) {
- if (qdp == NULL)
- qdp = biod.bufListEndp;
- else
- qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
- osi_assert(qdp != NULL);
+ while(nbytes > 0) {
+ if (qdp == NULL)
+ qdp = biod.bufListEndp;
+ else
+ qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
+ osi_assert(qdp != NULL);
bufp = osi_GetQData(qdp);
bufferp = bufp->datap;
wbytes = nbytes;
/* write out wbytes of data from bufferp */
temp = rx_Write(callp, bufferp, wbytes);
if (temp != wbytes) {
+ osi_Log2(afsd_logp, "rx_Write failed %d != %d",temp,wbytes);
code = -1;
- break;
- }
+ break;
+ } else {
+ osi_Log1(afsd_logp, "rx_Write succeeded %d",temp);
+ }
nbytes -= wbytes;
} /* while more bytes to write */
- } /* if RPC started successfully */
-
- if (code == 0)
- code = EndRXAFS_StoreData(callp, &outStatus, &volSync);
+ } /* if RPC started successfully */
+ else {
+ osi_Log1(afsd_logp, "StartRXAFS_StoreData failed (%lX)",code);
+ }
+ if (code == 0) {
+ code = EndRXAFS_StoreData(callp, &outStatus, &volSync);
+ if (code)
+ osi_Log1(afsd_logp, "EndRXAFS_StoreData failed (%lX)",code);
+ }
code = rx_EndCall(callp, code);
osi_Log0(afsd_logp, "CALL StoreData DONE");
- } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync, NULL, code));
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync, NULL, NULL, code));
code = cm_MapRPCError(code, reqp);
/* now, clean up our state */
lock_ObtainMutex(&scp->mx);
- cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
- if (code == 0) {
- /* now, here's something a little tricky: in AFS 3, a dirty
- * length can't be directly stored, instead, a dirty chunk is
- * stored that sets the file's size (by writing and by using
- * the truncate-first option in the store call).
- *
+ if (code == 0) {
+ /* now, here's something a little tricky: in AFS 3, a dirty
+ * length can't be directly stored, instead, a dirty chunk is
+ * stored that sets the file's size (by writing and by using
+ * the truncate-first option in the store call).
+ *
* At this point, we've just finished a store, and so the trunc
- * pos field is clean. If the file's size at the server is at
- * least as big as we think it should be, then we turn off the
- * length dirty bit, since all the other dirty buffers must
- * precede this one in the file.
+ * pos field is clean. If the file's size at the server is at
+ * least as big as we think it should be, then we turn off the
+ * length dirty bit, since all the other dirty buffers must
+ * precede this one in the file.
*
* The file's desired size shouldn't be smaller than what's
- * stored at the server now, since we just did the trunc pos
- * store.
+ * stored at the server now, since we just did the trunc pos
+ * store.
*
* We have to turn off the length dirty bit as soon as we can,
- * so that we see updates made by other machines.
+ * so that we see updates made by other machines.
*/
- if (outStatus.Length >= scp->length.LowPart)
+ if (outStatus.Length >= scp->length.LowPart)
scp->mask &= ~CM_SCACHEMASK_LENGTH;
- cm_MergeStatus(scp, &outStatus, &volSync, userp, 0);
- } else {
- if (code == CM_ERROR_SPACE)
- scp->flags |= CM_SCACHEFLAG_OUTOFSPACE;
- else if (code == CM_ERROR_QUOTA)
- scp->flags |= CM_SCACHEFLAG_OVERQUOTA;
- }
+ cm_MergeStatus(scp, &outStatus, &volSync, userp, 0);
+ } else {
+ if (code == CM_ERROR_SPACE)
+ scp->flags |= CM_SCACHEFLAG_OUTOFSPACE;
+ else if (code == CM_ERROR_QUOTA)
+ scp->flags |= CM_SCACHEFLAG_OVERQUOTA;
+ }
lock_ReleaseMutex(&scp->mx);
cm_ReleaseBIOD(&biod, 1);
- cm_ReleaseSCache(scp);
+ cm_ReleaseSCache(scp);
return code;
}
AFSStoreStatus inStatus;
AFSVolSync volSync;
AFSFid tfid;
- long code;
- long truncPos;
- cm_conn_t *connp;
+ long code;
+ long truncPos;
+ cm_conn_t *connp;
struct rx_call *callp;
- /* Serialize StoreData RPC's; for rationale see cm_scache.c */
- (void) cm_SyncOp(scp, NULL, userp, reqp, 0,
+ /* 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;
+ /* prepare the output status for the store */
+ inStatus.Mask = AFS_SETMODTIME;
+ inStatus.ClientModTime = scp->clientModTime;
+ scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
- /* calculate truncation position */
+ /* calculate truncation position */
truncPos = scp->length.LowPart;
if ((scp->mask & CM_SCACHEMASK_TRUNCPOS)
&& scp->truncPos.LowPart < (unsigned long) truncPos)
truncPos = scp->truncPos.LowPart;
- scp->mask &= ~CM_SCACHEMASK_TRUNCPOS;
-
- lock_ReleaseMutex(&scp->mx);
+ scp->mask &= ~CM_SCACHEMASK_TRUNCPOS;
+
+ lock_ReleaseMutex(&scp->mx);
- cm_AFSFidFromFid(&tfid, &scp->fid);
+ cm_AFSFidFromFid(&tfid, &scp->fid);
/* now we're ready to do the store operation */
do {
- code = cm_Conn(&scp->fid, userp, reqp, &connp);
+ code = cm_Conn(&scp->fid, userp, reqp, &connp);
if (code)
continue;
- callp = rx_NewCall(connp->callp);
+ lock_ObtainMutex(&connp->mx);
+ callp = rx_NewCall(connp->callp);
+ lock_ReleaseMutex(&connp->mx);
code = StartRXAFS_StoreData(callp, &tfid, &inStatus,
0, 0, truncPos);
- if (code == 0)
- code = EndRXAFS_StoreData(callp, &outStatus, &volSync);
+ if (code == 0)
+ code = EndRXAFS_StoreData(callp, &outStatus, &volSync);
code = rx_EndCall(callp, code);
- } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync, NULL, code));
+
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync, NULL, NULL, code));
code = cm_MapRPCError(code, reqp);
/* now, clean up our state */
lock_ObtainMutex(&scp->mx);
- cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STOREDATA_EXCL);
- if (code == 0) {
- /*
- * For explanation of handling of CM_SCACHEMASK_LENGTH,
- * see cm_BufWrite().
- */
- if (outStatus.Length >= scp->length.LowPart)
+ if (code == 0) {
+ /*
+ * For explanation of handling of CM_SCACHEMASK_LENGTH,
+ * see cm_BufWrite().
+ */
+ if (outStatus.Length >= scp->length.LowPart)
scp->mask &= ~CM_SCACHEMASK_LENGTH;
- cm_MergeStatus(scp, &outStatus, &volSync, userp, 0);
- }
+ cm_MergeStatus(scp, &outStatus, &volSync, userp, 0);
+ }
- return code;
+ return code;
}
long cm_BufRead(cm_buf_t *bufp, long nbytes, long *bytesReadp, cm_user_t *userp)
{
- *bytesReadp = buf_bufferSize;
+ *bytesReadp = buf_bufferSize;
- /* now return a code that means that I/O is done */
+ /* now return a code that means that I/O is done */
return 0;
}
*/
long cm_BufStabilize(void *parmp, cm_user_t *userp, cm_req_t *reqp)
{
- cm_scache_t *scp;
+ cm_scache_t *scp;
long code;
scp = parmp;
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainMutex(&scp->mx);
code = cm_SyncOp(scp, NULL, userp, reqp, 0,
CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_SETSIZE);
- if (code) {
- lock_ReleaseMutex(&scp->mx);
+ if (code) {
+ lock_ReleaseMutex(&scp->mx);
return code;
- }
+ }
return 0;
}
/* undoes the work that cm_BufStabilize does: releases lock so things can change again */
long cm_BufUnstabilize(void *parmp, cm_user_t *userp)
{
- cm_scache_t *scp;
+ cm_scache_t *scp;
scp = parmp;
lock_ReleaseMutex(&scp->mx);
- /* always succeeds */
+ /* always succeeds */
return 0;
}
cm_buf_ops_t cm_bufOps = {
- cm_BufWrite,
+ cm_BufWrite,
cm_BufRead,
cm_BufStabilize,
cm_BufUnstabilize
int cm_InitDCache(long chunkSize, long nbuffers)
{
- lock_InitializeMutex(&cm_bufGetMutex, "buf_Get mutex");
- if (nbuffers)
+ lock_InitializeMutex(&cm_bufGetMutex, "buf_Get mutex");
+ if (nbuffers)
buf_nbuffers = nbuffers;
- return buf_Init(&cm_bufOps);
+ return buf_Init(&cm_bufOps);
}
/* check to see if we have an up-to-date buffer. The buffer must have
*/
int cm_HaveBuffer(cm_scache_t *scp, cm_buf_t *bufp, int isBufLocked)
{
- int code;
- if (!cm_HaveCallback(scp))
- return 0;
- if ((bufp->cmFlags
- & (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED))
- == (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED))
- return 1;
- if (bufp->dataVersion == scp->dataVersion)
- return 1;
- if (!isBufLocked) {
- code = lock_TryMutex(&bufp->mx);
+ int code;
+ if (!cm_HaveCallback(scp))
+ return 0;
+ if ((bufp->cmFlags
+ & (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED))
+ == (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED))
+ return 1;
+ if (bufp->dataVersion == scp->dataVersion)
+ return 1;
+ if (!isBufLocked) {
+ code = lock_TryMutex(&bufp->mx);
if (code == 0) {
- /* don't have the lock, and can't lock it, then
+ /* don't have the lock, and can't lock it, then
* return failure.
*/
return 0;
}
}
- /* remember dirty flag for later */
- code = bufp->flags & CM_BUF_DIRTY;
+ /* remember dirty flag for later */
+ code = bufp->flags & CM_BUF_DIRTY;
- /* release lock if we obtained it here */
- if (!isBufLocked)
+ /* release lock if we obtained it here */
+ if (!isBufLocked)
lock_ReleaseMutex(&bufp->mx);
- /* if buffer was dirty, buffer is acceptable for use */
- if (code)
- return 1;
- else
- return 0;
+ /* if buffer was dirty, buffer is acceptable for use */
+ if (code)
+ return 1;
+ else
+ return 0;
}
/* used when deciding whether to do a prefetch or not */
long cm_CheckFetchRange(cm_scache_t *scp, osi_hyper_t *startBasep, long length,
- cm_user_t *up, cm_req_t *reqp, osi_hyper_t *realBasep)
+ cm_user_t *up, cm_req_t *reqp, osi_hyper_t *realBasep)
{
- osi_hyper_t toffset;
+ osi_hyper_t toffset;
osi_hyper_t tbase;
long code;
cm_buf_t *bp;
/* now scan all buffers in the range, looking for any that look like
* they need work.
*/
- tbase = *startBasep;
- stop = 0;
- lock_ObtainMutex(&scp->mx);
+ tbase = *startBasep;
+ stop = 0;
+ lock_ObtainMutex(&scp->mx);
while(length > 0) {
- /* get callback so we can do a meaningful dataVersion comparison */
+ /* get callback so we can do a meaningful dataVersion comparison */
code = cm_SyncOp(scp, NULL, up, reqp, 0,
- CM_SCACHESYNC_NEEDCALLBACK
- | CM_SCACHESYNC_GETSTATUS);
- if (code) {
- scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
- lock_ReleaseMutex(&scp->mx);
+ CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
+ if (code) {
+ scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
+ lock_ReleaseMutex(&scp->mx);
return code;
}
if (LargeIntegerGreaterThanOrEqualTo(tbase, scp->length)) {
- /* we're past the end of file */
+ /* we're past the end of file */
break;
}
- bp = buf_Find(scp, &tbase);
- /* We cheat slightly by not locking the bp mutex. */
+ bp = buf_Find(scp, &tbase);
+ /* We cheat slightly by not locking the bp mutex. */
if (bp) {
if ((bp->cmFlags
- & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING)) == 0
+ & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING)) == 0
&& bp->dataVersion != scp->dataVersion)
stop = 1;
buf_Release(bp);
- }
+ }
else
stop = 1;
- /* if this buffer is essentially guaranteed to require a fetch,
+ /* if this buffer is essentially guaranteed to require a fetch,
* break out here and return this position.
*/
if (stop)
* particular buffer in the range that definitely needs to be fetched.
*/
if (stop == 0) {
- /* return non-zero code since realBasep won't be valid */
- scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
- code = -1;
- }
+ /* return non-zero code since realBasep won't be valid */
+ scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
+ code = -1;
+ }
else {
- /* successfully found a page that will need fetching */
- *realBasep = tbase;
+ /* successfully found a page that will need fetching */
+ *realBasep = tbase;
code = 0;
}
lock_ReleaseMutex(&scp->mx);
}
void cm_BkgStore(cm_scache_t *scp, long p1, long p2, long p3, long p4,
- cm_user_t *userp)
+ cm_user_t *userp)
{
- osi_hyper_t toffset;
+ osi_hyper_t toffset;
long length;
- cm_req_t req;
+ cm_req_t req;
- cm_InitReq(&req);
- req.flags |= CM_REQ_NORETRY;
+ cm_InitReq(&req);
+ req.flags |= CM_REQ_NORETRY;
toffset.LowPart = p1;
toffset.HighPart = p2;
length = p3;
- osi_Log2(afsd_logp, "Starting BKG store vp 0x%x, base 0x%x", scp, p1);
+ osi_Log2(afsd_logp, "Starting BKG store vp 0x%x, base 0x%x", scp, p1);
- cm_BufWrite(&scp->fid, &toffset, length, /* flags */ 0, userp, &req);
+ cm_BufWrite(&scp->fid, &toffset, length, /* flags */ 0, userp, &req);
- lock_ObtainMutex(&scp->mx);
- cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_ASYNCSTORE);
+ lock_ObtainMutex(&scp->mx);
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_ASYNCSTORE);
lock_ReleaseMutex(&scp->mx);
}
void cm_ClearPrefetchFlag(long code, cm_scache_t *scp, osi_hyper_t *base)
{
- osi_hyper_t thyper;
-
- if (code == 0) {
- thyper.LowPart = cm_chunkSize;
- thyper.HighPart = 0;
- thyper = LargeIntegerAdd(*base, thyper);
- thyper.LowPart &= (-cm_chunkSize);
- if (LargeIntegerGreaterThan(*base, scp->prefetch.base))
+ osi_hyper_t thyper;
+
+ if (code == 0) {
+ thyper.LowPart = cm_chunkSize;
+ thyper.HighPart = 0;
+ thyper = LargeIntegerAdd(*base, thyper);
+ thyper.LowPart &= (-cm_chunkSize);
+ if (LargeIntegerGreaterThan(*base, scp->prefetch.base))
scp->prefetch.base = *base;
- if (LargeIntegerGreaterThan(thyper, scp->prefetch.end))
+ if (LargeIntegerGreaterThan(thyper, scp->prefetch.end))
scp->prefetch.end = thyper;
- }
- scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
+ }
+ scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
}
/* do the prefetch */
void cm_BkgPrefetch(cm_scache_t *scp, long p1, long p2, long p3, long p4,
- cm_user_t *userp)
+ cm_user_t *userp)
{
- long length;
+ long length;
osi_hyper_t base;
long code;
cm_buf_t *bp;
- int cpff = 0; /* cleared prefetch flag */
- cm_req_t req;
+ int cpff = 0; /* cleared prefetch flag */
+ cm_req_t req;
- cm_InitReq(&req);
- req.flags |= CM_REQ_NORETRY;
+ cm_InitReq(&req);
+ req.flags |= CM_REQ_NORETRY;
- base.LowPart = p1;
+ base.LowPart = p1;
base.HighPart = p2;
length = p3;
- osi_Log2(afsd_logp, "Starting BKG prefetch vp 0x%x, base 0x%x", scp, p1);
+ osi_Log2(afsd_logp, "Starting BKG prefetch vp 0x%x, base 0x%x", scp, p1);
code = buf_Get(scp, &base, &bp);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainMutex(&scp->mx);
if (code || (bp->cmFlags & CM_BUF_CMFETCHING)) {
- scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
- lock_ReleaseMutex(&scp->mx);
- return;
- }
+ scp->flags &= ~CM_SCACHEFLAG_PREFETCHING;
+ lock_ReleaseMutex(&scp->mx);
+ return;
+ }
code = cm_GetBuffer(scp, bp, &cpff, userp, &req);
- if (!cpff)
+ if (!cpff)
cm_ClearPrefetchFlag(code, scp, &base);
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseMutex(&scp->mx);
buf_Release(bp);
return;
}
* do a prefetch.
*/
void cm_ConsiderPrefetch(cm_scache_t *scp, osi_hyper_t *offsetp,
- cm_user_t *userp, cm_req_t *reqp)
+ cm_user_t *userp, cm_req_t *reqp)
{
- long code;
+ long code;
osi_hyper_t realBase;
osi_hyper_t readBase;
readBase = *offsetp;
- /* round up to chunk boundary */
- readBase.LowPart += (cm_chunkSize-1);
- readBase.LowPart &= (-cm_chunkSize);
+ /* round up to chunk boundary */
+ readBase.LowPart += (cm_chunkSize-1);
+ readBase.LowPart &= (-cm_chunkSize);
- lock_ObtainMutex(&scp->mx);
- if ((scp->flags & CM_SCACHEFLAG_PREFETCHING)
+ lock_ObtainMutex(&scp->mx);
+ if ((scp->flags & CM_SCACHEFLAG_PREFETCHING)
|| LargeIntegerLessThanOrEqualTo(readBase, scp->prefetch.base)) {
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseMutex(&scp->mx);
return;
- }
- scp->flags |= CM_SCACHEFLAG_PREFETCHING;
+ }
+ scp->flags |= CM_SCACHEFLAG_PREFETCHING;
- /* start the scan at the latter of the end of this read or
+ /* start the scan at the latter of the end of this read or
* the end of the last fetched region.
*/
- if (LargeIntegerGreaterThan(scp->prefetch.end, readBase))
+ if (LargeIntegerGreaterThan(scp->prefetch.end, readBase))
readBase = scp->prefetch.end;
lock_ReleaseMutex(&scp->mx);
code = cm_CheckFetchRange(scp, &readBase, cm_chunkSize, userp, reqp,
- &realBase);
- if (code)
+ &realBase);
+ if (code)
return; /* can't find something to prefetch */
osi_Log2(afsd_logp, "BKG Prefetch request vp 0x%x, base 0x%x",
* is being written out.
*/
long cm_SetupStoreBIOD(cm_scache_t *scp, osi_hyper_t *inOffsetp, long inSize,
- cm_bulkIO_t *biop, cm_user_t *userp, cm_req_t *reqp)
+ cm_bulkIO_t *biop, cm_user_t *userp, cm_req_t *reqp)
{
cm_buf_t *bufp;
osi_queueData_t *qdp;
long code;
long flags; /* flags to cm_SyncOp */
- /* clear things out */
- biop->scp = scp; /* don't hold */
+ /* clear things out */
+ biop->scp = scp; /* don't hold */
biop->offset = *inOffsetp;
biop->length = 0;
biop->bufListp = NULL;
biop->bufListEndp = NULL;
- biop->reserved = 0;
+ biop->reserved = 0;
- /* reserve a chunk's worth of buffers */
- lock_ReleaseMutex(&scp->mx);
- buf_ReserveBuffers(cm_chunkSize / buf_bufferSize);
- lock_ObtainMutex(&scp->mx);
+ /* reserve a chunk's worth of buffers */
+ lock_ReleaseMutex(&scp->mx);
+ buf_ReserveBuffers(cm_chunkSize / buf_bufferSize);
+ lock_ObtainMutex(&scp->mx);
bufp = NULL;
- for(temp = 0; temp < inSize; temp += buf_bufferSize, bufp = NULL) {
- thyper.HighPart = 0;
- thyper.LowPart = temp;
+ for (temp = 0; temp < inSize; temp += buf_bufferSize, bufp = NULL) {
+ thyper.HighPart = 0;
+ thyper.LowPart = temp;
tbase = LargeIntegerAdd(*inOffsetp, thyper);
bufp = buf_Find(scp, &tbase);
if (bufp) {
- /* get buffer mutex and scp mutex safely */
- lock_ReleaseMutex(&scp->mx);
- lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
-
- flags = CM_SCACHESYNC_NEEDCALLBACK
- | CM_SCACHESYNC_GETSTATUS
- | CM_SCACHESYNC_STOREDATA
- | CM_SCACHESYNC_BUFLOCKED;
- code = cm_SyncOp(scp, bufp, userp, reqp, 0, flags);
+ /* get buffer mutex and scp mutex safely */
+ lock_ReleaseMutex(&scp->mx);
+ lock_ObtainMutex(&bufp->mx);
+ lock_ObtainMutex(&scp->mx);
+
+ flags = CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_STOREDATA
+ | CM_SCACHESYNC_BUFLOCKED;
+ code = cm_SyncOp(scp, bufp, userp, reqp, 0, flags);
if (code) {
- lock_ReleaseMutex(&bufp->mx);
+ lock_ReleaseMutex(&bufp->mx);
buf_Release(bufp);
- buf_UnreserveBuffers(cm_chunkSize / buf_bufferSize);
+ buf_UnreserveBuffers(cm_chunkSize / buf_bufferSize);
return code;
- }
+ }
- /* if the buffer is dirty, we're done */
+ /* 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;
- break;
+ bufp->flags |= CM_BUF_WRITING;
+ break;
}
- /* this buffer is clean, so there's no reason to process it */
- cm_SyncOpDone(scp, bufp, flags);
- lock_ReleaseMutex(&bufp->mx);
- buf_Release(bufp);
- }
+ /* this buffer is clean, so there's no reason to process it */
+ cm_SyncOpDone(scp, bufp, flags);
+ lock_ReleaseMutex(&bufp->mx);
+ buf_Release(bufp);
+ }
}
- biop->reserved = 1;
+ 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.
+ * that weren't already being stored back, so we just quit now.
*/
- if (!bufp) {
- return 0;
- }
+ if (!bufp) {
+ return 0;
+ }
- /* don't need buffer mutex any more */
- lock_ReleaseMutex(&bufp->mx);
+ /* don't need buffer mutex any more */
+ lock_ReleaseMutex(&bufp->mx);
- /* put this element in the list */
+ /* put this element in the list */
qdp = osi_QDAlloc();
osi_SetQData(qdp, bufp);
- /* don't have to hold bufp, since held by buf_Find above */
+ /* don't have to hold bufp, since held by buf_Find above */
osi_QAddH((osi_queue_t **) &biop->bufListp,
(osi_queue_t **) &biop->bufListEndp,
&qdp->q);
firstModOffset = bufp->offset;
biop->offset = firstModOffset;
- /* compute the window surrounding *inOffsetp of size cm_chunkSize */
- scanStart = *inOffsetp;
+ /* compute the window surrounding *inOffsetp of size cm_chunkSize */
+ scanStart = *inOffsetp;
scanStart.LowPart &= (-cm_chunkSize);
- thyper.LowPart = cm_chunkSize;
+ thyper.LowPart = cm_chunkSize;
thyper.HighPart = 0;
- scanEnd = LargeIntegerAdd(scanStart, thyper);
+ scanEnd = LargeIntegerAdd(scanStart, thyper);
- flags = CM_SCACHESYNC_NEEDCALLBACK
- | CM_SCACHESYNC_GETSTATUS
+ flags = CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_GETSTATUS
| CM_SCACHESYNC_STOREDATA
| CM_SCACHESYNC_BUFLOCKED
| CM_SCACHESYNC_NOWAIT;
- /* start by looking backwards until scanStart */
- thyper.HighPart = 0; /* hyper version of buf_bufferSize */
+ /* start by looking backwards until scanStart */
+ thyper.HighPart = 0; /* hyper version of buf_bufferSize */
thyper.LowPart = buf_bufferSize;
- tbase = LargeIntegerSubtract(firstModOffset, thyper);
+ tbase = LargeIntegerSubtract(firstModOffset, thyper);
while(LargeIntegerGreaterThanOrEqualTo(tbase, scanStart)) {
/* see if we can find the buffer */
- bufp = buf_Find(scp, &tbase);
+ bufp = buf_Find(scp, &tbase);
if (!bufp)
break;
- /* try to lock it, and quit if we can't (simplifies locking) */
+ /* try to lock it, and quit if we can't (simplifies locking) */
code = lock_TryMutex(&bufp->mx);
if (code == 0) {
- buf_Release(bufp);
+ buf_Release(bufp);
break;
}
code = cm_SyncOp(scp, bufp, userp, reqp, 0, flags);
if (code) {
- lock_ReleaseMutex(&bufp->mx);
- buf_Release(bufp);
+ lock_ReleaseMutex(&bufp->mx);
+ buf_Release(bufp);
break;
}
- if (!(bufp->flags & CM_BUF_DIRTY)) {
- /* buffer is clean, so we shouldn't add it */
- cm_SyncOpDone(scp, bufp, flags);
- lock_ReleaseMutex(&bufp->mx);
- buf_Release(bufp);
+ if (!(bufp->flags & CM_BUF_DIRTY)) {
+ /* buffer is clean, so we shouldn't add it */
+ cm_SyncOpDone(scp, bufp, flags);
+ lock_ReleaseMutex(&bufp->mx);
+ buf_Release(bufp);
break;
}
- /* don't need buffer mutex any more */
- lock_ReleaseMutex(&bufp->mx);
+ /* don't need buffer mutex any more */
+ lock_ReleaseMutex(&bufp->mx);
/* we have a dirty buffer ready for storing. Add it to the tail
* of the list, since it immediately precedes all of the disk
* addresses we've already collected.
*/
- qdp = osi_QDAlloc();
+ qdp = osi_QDAlloc();
osi_SetQData(qdp, 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,
&qdp->q);
- /* update biod info describing the transfer */
+ /* update biod info describing the transfer */
biop->offset = LargeIntegerSubtract(biop->offset, thyper);
biop->length += buf_bufferSize;
tbase = LargeIntegerSubtract(tbase, thyper);
} /* while loop looking for pages preceding the one we found */
- /* now, find later dirty, contiguous pages, and add them to the list */
- thyper.HighPart = 0; /* hyper version of buf_bufferSize */
+ /* now, find later dirty, contiguous pages, and add them to the list */
+ thyper.HighPart = 0; /* hyper version of buf_bufferSize */
thyper.LowPart = buf_bufferSize;
- tbase = LargeIntegerAdd(firstModOffset, thyper);
+ tbase = LargeIntegerAdd(firstModOffset, thyper);
while(LargeIntegerLessThan(tbase, scanEnd)) {
- /* see if we can find the buffer */
- bufp = buf_Find(scp, &tbase);
+ /* see if we can find the buffer */
+ bufp = buf_Find(scp, &tbase);
if (!bufp)
break;
- /* try to lock it, and quit if we can't (simplifies locking) */
+ /* try to lock it, and quit if we can't (simplifies locking) */
code = lock_TryMutex(&bufp->mx);
if (code == 0) {
- buf_Release(bufp);
+ buf_Release(bufp);
break;
}
code = cm_SyncOp(scp, bufp, userp, reqp, 0, flags);
if (code) {
- lock_ReleaseMutex(&bufp->mx);
- buf_Release(bufp);
+ lock_ReleaseMutex(&bufp->mx);
+ buf_Release(bufp);
break;
}
- if (!(bufp->flags & CM_BUF_DIRTY)) {
- /* buffer is clean, so we shouldn't add it */
- cm_SyncOpDone(scp, bufp, flags);
- lock_ReleaseMutex(&bufp->mx);
- buf_Release(bufp);
+ if (!(bufp->flags & CM_BUF_DIRTY)) {
+ /* buffer is clean, so we shouldn't add it */
+ cm_SyncOpDone(scp, bufp, flags);
+ lock_ReleaseMutex(&bufp->mx);
+ buf_Release(bufp);
break;
}
- /* don't need buffer mutex any more */
- lock_ReleaseMutex(&bufp->mx);
+ /* don't need buffer mutex any more */
+ lock_ReleaseMutex(&bufp->mx);
/* we have a dirty buffer ready for storing. Add it to the head
* of the list, since it immediately follows all of the disk
* addresses we've already collected.
*/
- qdp = osi_QDAlloc();
+ qdp = osi_QDAlloc();
osi_SetQData(qdp, 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,
&qdp->q);
- /* update biod info describing the transfer */
+ /* update biod info describing the transfer */
biop->length += buf_bufferSize;
/* update loop pointer */
long cm_SetupFetchBIOD(cm_scache_t *scp, osi_hyper_t *offsetp,
cm_bulkIO_t *biop, cm_user_t *up, cm_req_t *reqp)
{
- long code;
+ long code;
cm_buf_t *tbp;
osi_hyper_t toffset; /* a long long temp variable */
osi_hyper_t pageBase; /* base offset we're looking at */
osi_hyper_t fileSize; /* the # of bytes in the file */
osi_queueData_t *heldBufListp; /* we hold all buffers in this list */
osi_queueData_t *heldBufListEndp; /* first one */
- int reserving;
+ int reserving;
biop->scp = scp;
biop->offset = *offsetp;
- /* null out the list of buffers */
+ /* null out the list of buffers */
biop->bufListp = biop->bufListEndp = NULL;
- biop->reserved = 0;
+ biop->reserved = 0;
- /* first lookup the file's length, so we know when to stop */
- code = cm_SyncOp(scp, NULL, up, reqp, 0, CM_SCACHESYNC_NEEDCALLBACK
- | CM_SCACHESYNC_GETSTATUS);
+ /* first lookup the file's length, so we know when to stop */
+ code = cm_SyncOp(scp, NULL, up, reqp, 0,
+ CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
if (code)
return code;
- /* copy out size, since it may change */
+ /* copy out size, since it may change */
fileSize = scp->serverLength;
lock_ReleaseMutex(&scp->mx);
- pageBase = *offsetp;
+ pageBase = *offsetp;
collected = pageBase.LowPart & (cm_chunkSize - 1);
heldBufListp = NULL;
heldBufListEndp = NULL;
- /*
- * Obtaining buffers can cause dirty buffers to be recycled, which
- * can cause a storeback, so cannot be done while we have buffers
- * reserved.
- *
- * To get around this, we get buffers twice. Before reserving buffers,
- * we obtain and release each one individually. After reserving
- * buffers, we try to obtain them again, but only by lookup, not by
- * recycling. If a buffer has gone away while we were waiting for
- * the others, we just use whatever buffers we already have.
- *
- * On entry to this function, we are already holding a buffer, so we
- * can't wait for reservation. So we call buf_TryReserveBuffers()
- * instead. Not only that, we can't really even call buf_Get(), for
- * the same reason. We can't avoid that, though. To avoid deadlock
- * we allow only one thread to be executing the buf_Get()-buf_Release()
- * sequence at a time.
- */
-
- /* first hold all buffers, since we can't hold any locks in buf_Get */
+ /*
+ * Obtaining buffers can cause dirty buffers to be recycled, which
+ * can cause a storeback, so cannot be done while we have buffers
+ * reserved.
+ *
+ * To get around this, we get buffers twice. Before reserving buffers,
+ * we obtain and release each one individually. After reserving
+ * buffers, we try to obtain them again, but only by lookup, not by
+ * recycling. If a buffer has gone away while we were waiting for
+ * the others, we just use whatever buffers we already have.
+ *
+ * On entry to this function, we are already holding a buffer, so we
+ * can't wait for reservation. So we call buf_TryReserveBuffers()
+ * instead. Not only that, we can't really even call buf_Get(), for
+ * the same reason. We can't avoid that, though. To avoid deadlock
+ * we allow only one thread to be executing the buf_Get()-buf_Release()
+ * sequence at a time.
+ */
+
+ /* first hold all buffers, since we can't hold any locks in buf_Get */
while (1) {
- /* stop at chunk boundary */
- if (collected >= cm_chunkSize) break;
+ /* stop at chunk boundary */
+ if (collected >= cm_chunkSize) break;
/* see if the next page would be past EOF */
if (LargeIntegerGreaterThanOrEqualTo(pageBase, fileSize)) break;
- lock_ObtainMutex(&cm_bufGetMutex);
+ lock_ObtainMutex(&cm_bufGetMutex);
- code = buf_Get(scp, &pageBase, &tbp);
+ code = buf_Get(scp, &pageBase, &tbp);
if (code) {
- lock_ReleaseMutex(&cm_bufGetMutex);
- lock_ObtainMutex(&scp->mx);
- return code;
- }
+ lock_ReleaseMutex(&cm_bufGetMutex);
+ lock_ObtainMutex(&scp->mx);
+ return code;
+ }
- buf_Release(tbp);
+ buf_Release(tbp);
- lock_ReleaseMutex(&cm_bufGetMutex);
+ lock_ReleaseMutex(&cm_bufGetMutex);
toffset.HighPart = 0;
toffset.LowPart = buf_bufferSize;
pageBase = LargeIntegerAdd(toffset, pageBase);
- collected += buf_bufferSize;
+ collected += buf_bufferSize;
}
/* reserve a chunk's worth of buffers if possible */
- reserving = buf_TryReserveBuffers(cm_chunkSize / buf_bufferSize);
+ reserving = buf_TryReserveBuffers(cm_chunkSize / buf_bufferSize);
- pageBase = *offsetp;
+ pageBase = *offsetp;
collected = pageBase.LowPart & (cm_chunkSize - 1);
- /* now hold all buffers, if they are still there */
+ /* now hold all buffers, if they are still there */
while (1) {
- /* stop at chunk boundary */
- if (collected >= cm_chunkSize)
+ /* stop at chunk boundary */
+ if (collected >= cm_chunkSize)
break;
/* see if the next page would be past EOF */
break;
tbp = buf_Find(scp, &pageBase);
- if (!tbp)
+ if (!tbp)
break;
/* add the buffer to the list */
- qdp = osi_QDAlloc();
+ qdp = osi_QDAlloc();
osi_SetQData(qdp, tbp);
osi_QAdd((osi_queue_t **)&heldBufListp, &qdp->q);
if (!heldBufListEndp) heldBufListEndp = qdp;
- /* leave tbp held (from buf_Get) */
+ /* leave tbp held (from buf_Get) */
- if (!reserving)
+ if (!reserving)
break;
collected += buf_bufferSize;
}
/* look at each buffer, adding it into the list if it looks idle and
- * filled with old data. One special case: wait for idle if it is the
- * first buffer since we really need that one for our caller to make
- * any progress.
+ * filled with old data. One special case: wait for idle if it is the
+ * first buffer since we really need that one for our caller to make
+ * any progress.
*/
isFirst = 1;
collected = 0; /* now count how many we'll really use */
- for(tqdp = heldBufListEndp;
+ for (tqdp = heldBufListEndp;
tqdp;
- tqdp = (osi_queueData_t *) osi_QPrev(&tqdp->q)) {
- /* get a ptr to the held buffer */
- tbp = osi_GetQData(tqdp);
+ tqdp = (osi_queueData_t *) osi_QPrev(&tqdp->q)) {
+ /* get a ptr to the held buffer */
+ tbp = osi_GetQData(tqdp);
pageBase = tbp->offset;
- /* now lock the buffer lock */
- lock_ObtainMutex(&tbp->mx);
- lock_ObtainMutex(&scp->mx);
+ /* now lock the buffer lock */
+ lock_ObtainMutex(&tbp->mx);
+ lock_ObtainMutex(&scp->mx);
- /* don't bother fetching over data that is already current */
- if (tbp->dataVersion == scp->dataVersion) {
- /* we don't need this buffer, since it is current */
- lock_ReleaseMutex(&scp->mx);
+ /* don't bother fetching over data that is already current */
+ if (tbp->dataVersion == scp->dataVersion) {
+ /* we don't need this buffer, since it is current */
+ lock_ReleaseMutex(&scp->mx);
lock_ReleaseMutex(&tbp->mx);
break;
}
- flags = CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_FETCHDATA
- | CM_SCACHESYNC_BUFLOCKED;
- if (!isFirst)
+ flags = CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_FETCHDATA
+ | CM_SCACHESYNC_BUFLOCKED;
+ if (!isFirst)
flags |= CM_SCACHESYNC_NOWAIT;
- /* wait for the buffer to serialize, if required. Doesn't
- * release the scp or buffer lock(s) if NOWAIT is specified.
+ /* wait for the buffer to serialize, if required. Doesn't
+ * release the scp or buffer lock(s) if NOWAIT is specified.
*/
- code = cm_SyncOp(scp, tbp, up, reqp, 0, flags);
+ code = cm_SyncOp(scp, tbp, up, reqp, 0, flags);
if (code) {
- lock_ReleaseMutex(&scp->mx);
- lock_ReleaseMutex(&tbp->mx);
+ lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseMutex(&tbp->mx);
break;
- }
+ }
- /* don't fetch over dirty buffers */
+ /* don't fetch over dirty buffers */
if (tbp->flags & CM_BUF_DIRTY) {
- cm_SyncOpDone(scp, tbp, flags);
- lock_ReleaseMutex(&scp->mx);
+ cm_SyncOpDone(scp, tbp, flags);
+ lock_ReleaseMutex(&scp->mx);
lock_ReleaseMutex(&tbp->mx);
break;
- }
+ }
- /* Release locks */
- lock_ReleaseMutex(&scp->mx);
- lock_ReleaseMutex(&tbp->mx);
+ /* Release locks */
+ lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseMutex(&tbp->mx);
/* add the buffer to the list */
- qdp = osi_QDAlloc();
+ qdp = osi_QDAlloc();
osi_SetQData(qdp, tbp);
osi_QAdd((osi_queue_t **)&biop->bufListp, &qdp->q);
if (!biop->bufListEndp)
biop->bufListEndp = qdp;
- buf_Hold(tbp);
+ buf_Hold(tbp);
- /* from now on, a failure just stops our collection process, but
+ /* from now on, a failure just stops our collection process, but
* we still do the I/O to whatever we've already managed to collect.
*/
isFirst = 0;
}
/* 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.
+ * interested in. We also have holds left from heldBufListp, and we
+ * now release those holds on the buffers.
*/
- for(qdp = heldBufListp; qdp; qdp = tqdp) {
- tqdp = (osi_queueData_t *) osi_QNext(&qdp->q);
- tbp = osi_GetQData(qdp);
+ for (qdp = heldBufListp; qdp; qdp = tqdp) {
+ tqdp = (osi_queueData_t *) osi_QNext(&qdp->q);
+ tbp = osi_GetQData(qdp);
osi_QDFree(qdp);
buf_Release(tbp);
}
- /* Caller expects this */
- lock_ObtainMutex(&scp->mx);
+ /* Caller expects this */
+ lock_ObtainMutex(&scp->mx);
- /* if we got a failure setting up the first buffer, then we don't have
+ /* 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.
*/
if (code && isFirst) {
- buf_UnreserveBuffers(cm_chunkSize / buf_bufferSize);
- return code;
- }
+ buf_UnreserveBuffers(cm_chunkSize / buf_bufferSize);
+ return code;
+ }
/* otherwise, we're still OK, and should just return the I/O setup we've
* got.
*/
- biop->length = collected;
- biop->reserved = reserving;
+ biop->length = collected;
+ biop->reserved = reserving;
return 0;
}
*/
void cm_ReleaseBIOD(cm_bulkIO_t *biop, int isStore)
{
- cm_scache_t *scp;
+ cm_scache_t *scp;
cm_buf_t *bufp;
osi_queueData_t *qdp;
osi_queueData_t *nqdp;
int flags;
- /* Give back reserved buffers */
- if (biop->reserved)
- buf_UnreserveBuffers(cm_chunkSize / buf_bufferSize);
+ /* Give back reserved buffers */
+ if (biop->reserved)
+ buf_UnreserveBuffers(cm_chunkSize / buf_bufferSize);
- flags = CM_SCACHESYNC_NEEDCALLBACK;
+ flags = CM_SCACHESYNC_NEEDCALLBACK;
if (isStore)
flags |= CM_SCACHESYNC_STOREDATA;
- else
- flags |= CM_SCACHESYNC_FETCHDATA;
+ else
+ flags |= CM_SCACHESYNC_FETCHDATA;
- scp = biop->scp;
+ scp = biop->scp;
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);
+ /* 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 */
+ /* extract buffer and free queue data */
bufp = osi_GetQData(qdp);
osi_QDFree(qdp);
/* now, mark I/O as done, unlock the buffer and release it */
- lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainMutex(&bufp->mx);
+ lock_ObtainMutex(&scp->mx);
cm_SyncOpDone(scp, bufp, flags);
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseMutex(&scp->mx);
- /* turn off writing and wakeup users */
+ /* turn off writing and wakeup users */
if (isStore) {
if (bufp->flags & CM_BUF_WAITING) {
- osi_Wakeup((long) bufp);
+ osi_Wakeup((long) bufp);
}
- bufp->flags &= ~(CM_BUF_WAITING | CM_BUF_WRITING
- | CM_BUF_DIRTY);
+ bufp->flags &= ~(CM_BUF_WAITING | CM_BUF_WRITING | CM_BUF_DIRTY);
}
lock_ReleaseMutex(&bufp->mx);
* The scp is locked on return.
*/
long cm_GetBuffer(cm_scache_t *scp, cm_buf_t *bufp, int *cpffp, cm_user_t *up,
- cm_req_t *reqp)
+ cm_req_t *reqp)
{
- long code;
+ long code;
long nbytes; /* bytes in transfer */
long rbytes; /* bytes in rx_Read call */
long temp;
struct rx_call *callp;
cm_bulkIO_t biod; /* bulk IO descriptor */
cm_conn_t *connp;
- int getroot;
- long t1, t2;
+ int getroot;
+ long t1, t2;
/* now, the buffer may or may not be filled with good data (buf_GetNew
* drops lots of locks, and may indeed return a properly initialized
#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
+ // 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_rootSCachep) ;
+ getroot = (scp==cm_rootSCachep);
+ if (getroot)
+ osi_Log1(afsd_logp,"GetBuffer returns cm_rootSCachep=%x",cm_rootSCachep);
#endif
- cm_AFSFidFromFid(&tfid, &scp->fid);
+ cm_AFSFidFromFid(&tfid, &scp->fid);
- code = cm_SetupFetchBIOD(scp, &bufp->offset, &biod, up, reqp);
- if (code) {
- /* couldn't even get the first page setup properly */
- osi_Log1(afsd_logp, "SetupFetchBIOD failure code %d", code);
+ code = cm_SetupFetchBIOD(scp, &bufp->offset, &biod, up, reqp);
+ if (code) {
+ /* couldn't even get the first page setup properly */
+ osi_Log1(afsd_logp, "SetupFetchBIOD failure code %d", code);
return code;
- }
+ }
/* once we get here, we have the callback in place, we know that no one
- * is fetching the data now. Check one last time that we still have
- * the wrong data, and then fetch it if we're still wrong.
- *
+ * is fetching the data now. Check one last time that we still have
+ * the wrong data, and then fetch it if we're still wrong.
+ *
* We can lose a race condition and end up with biod.length zero, in
- * which case we just retry.
+ * which case we just retry.
*/
if (bufp->dataVersion == scp->dataVersion || biod.length == 0) {
- osi_Log3(afsd_logp, "Bad DVs %d, %d or length 0x%x",
+ osi_Log3(afsd_logp, "Bad DVs %d, %d or length 0x%x",
bufp->dataVersion, scp->dataVersion, biod.length);
- if ((bufp->dataVersion == -1
- || bufp->dataVersion < scp->dataVersion)
+ if ((bufp->dataVersion == -1
+ || bufp->dataVersion < scp->dataVersion)
&& LargeIntegerGreaterThanOrEqualTo(bufp->offset,
scp->serverLength)) {
- if (bufp->dataVersion == -1)
- memset(bufp->datap, 0, buf_bufferSize);
- bufp->dataVersion = scp->dataVersion;
- }
- lock_ReleaseMutex(&scp->mx);
- cm_ReleaseBIOD(&biod, 0);
- lock_ObtainMutex(&scp->mx);
+ if (bufp->dataVersion == -1)
+ memset(bufp->datap, 0, buf_bufferSize);
+ bufp->dataVersion = scp->dataVersion;
+ }
+ lock_ReleaseMutex(&scp->mx);
+ cm_ReleaseBIOD(&biod, 0);
+ lock_ObtainMutex(&scp->mx);
return 0;
}
#ifdef AFS_FREELANCE_CLIENT
- // yj code
- // if getroot then we don't need to make any calls
- // just return fake data
+ // 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 = cm_fakeDirVersion;
- 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 = 0x3b49f6e2;
- afsStatus.ServerModTime = 0x3b49f6e2;
- afsStatus.Group = 0;
- afsStatus.SyncCounter = 0;
- afsStatus.dataVersionHigh = 0;
+ if (cm_freelanceEnabled && getroot) {
+ // setup the fake status
+ afsStatus.InterfaceVersion = 0x1;
+ afsStatus.FileType = 0x2;
+ afsStatus.LinkCount = scp->linkCount;
+ afsStatus.Length = cm_fakeDirSize;
+ afsStatus.DataVersion = scp->dataVersion;
+ 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 = FakeFreelanceModTime;
+ afsStatus.ServerModTime = FakeFreelanceModTime;
+ afsStatus.Group = 0;
+ afsStatus.SyncCounter = 0;
+ afsStatus.dataVersionHigh = 0;
- // 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.
+ // 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);
-#ifdef DEBUG
- afsi_log("bufp->offset is %d", bufp->offset);
-#endif
- t1 = bufp->offset.LowPart;
- qdp = biod.bufListEndp;
- while (qdp) {
- tbufp = osi_GetQData(qdp);
- bufferp=tbufp->datap;
- memset(bufferp, 0, buf_bufferSize);
- t2 = cm_fakeDirSize - t1;
- if (t2>buf_bufferSize) t2=buf_bufferSize;
-#ifdef DEBUG
- afsi_log("t1:%d, t2:%d", t1, t2);
-#endif
- if (t2 > 0) {
- memcpy(bufferp, cm_FakeRootDir+t1, t2);
- } else {
- t2 = 0;
- }
- t1+=t2;
- qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
-
- }
- lock_ReleaseMutex(&cm_Freelance_Lock);
+ lock_ObtainMutex(&cm_Freelance_Lock);
+ t1 = bufp->offset.LowPart;
+ qdp = biod.bufListEndp;
+ while (qdp) {
+ tbufp = osi_GetQData(qdp);
+ bufferp=tbufp->datap;
+ memset(bufferp, 0, buf_bufferSize);
+ t2 = cm_fakeDirSize - t1;
+ if (t2>buf_bufferSize) t2=buf_bufferSize;
+ if (t2 > 0) {
+ memcpy(bufferp, cm_FakeRootDir+t1, t2);
+ } else {
+ t2 = 0;
+ }
+ t1+=t2;
+ qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
+
+ }
+ 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
+ // once we're done, we skip over the part of the
+ // code that does the ACTUAL fetching of data for
+ // real files
- goto fetchingcompleted;
- }
+ goto fetchingcompleted;
+ }
#endif /* AFS_FREELANCE_CLIENT */
/* now make the call */
do {
- code = cm_Conn(&scp->fid, up, reqp, &connp);
+ code = cm_Conn(&scp->fid, up, reqp, &connp);
if (code)
continue;
- callp = rx_NewCall(connp->callp);
+ lock_ObtainMutex(&connp->mx);
+ callp = rx_NewCall(connp->callp);
+ lock_ReleaseMutex(&connp->mx);
- osi_Log3(afsd_logp, "CALL FetchData vp %x, off 0x%x, size 0x%x",
- (long) scp, biod.offset.LowPart, biod.length);
+ osi_Log3(afsd_logp, "CALL FetchData vp %x, off 0x%x, size 0x%x",
+ (long) scp, biod.offset.LowPart, biod.length);
code = StartRXAFS_FetchData(callp, &tfid, biod.offset.LowPart,
biod.length);
- /* now copy the data out of the pipe and put it in the buffer */
- temp = rx_Read(callp, &nbytes, 4);
- if (temp == 4) {
- nbytes = ntohl(nbytes);
+ /* now copy the data out of the pipe and put it in the buffer */
+ temp = rx_Read(callp, (char *)&nbytes, 4);
+ if (temp == 4) {
+ nbytes = ntohl(nbytes);
if (nbytes > biod.length)
code = (callp->error < 0) ? callp->error : -1;
}
else
code = (callp->error < 0) ? callp->error : -1;
- if (code == 0) {
+ if (code == 0) {
qdp = biod.bufListEndp;
if (qdp) {
- tbufp = osi_GetQData(qdp);
+ tbufp = osi_GetQData(qdp);
bufferp = tbufp->datap;
}
else
bufferp = NULL;
- /* fill nbytes 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
+ /* fill nbytes 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(nbytes > 0) {
- /* assert that there are still more buffers;
- * our check above for nbytes being less than
- * biod.length should ensure this.
+ while (nbytes > 0) {
+ /* assert that there are still more buffers;
+ * our check above for nbytes being less than
+ * biod.length should ensure this.
*/
- osi_assert(bufferp != NULL);
+ osi_assert(bufferp != NULL);
- /* read rbytes of data */
+ /* read rbytes of data */
rbytes = (nbytes > buf_bufferSize? buf_bufferSize : nbytes);
temp = rx_Read(callp, bufferp, rbytes);
if (temp < rbytes) {
code = (callp->error < 0) ? callp->error : -1;
break;
- }
-
- /* 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.
- */
- tbufp->cmFlags |= CM_BUF_CMFULLYFETCHED;
- lock_ObtainMutex(&scp->mx);
- if (scp->flags & CM_SCACHEFLAG_WAITING) {
- scp->flags &= ~CM_SCACHEFLAG_WAITING;
- osi_Wakeup((long) &scp->flags);
- }
- if (cpffp && !*cpffp && !osi_QPrev(&qdp->q)) {
- *cpffp = 1;
- cm_ClearPrefetchFlag(0, scp, &biod.offset);
- }
- lock_ReleaseMutex(&scp->mx);
-
- /* and adjust counters */
+ }
+
+ /* 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.
+ */
+ tbufp->cmFlags |= CM_BUF_CMFULLYFETCHED;
+ lock_ObtainMutex(&scp->mx);
+ if (scp->flags & CM_SCACHEFLAG_WAITING) {
+ scp->flags &= ~CM_SCACHEFLAG_WAITING;
+ osi_Wakeup((long) &scp->flags);
+ }
+ if (cpffp && !*cpffp && !osi_QPrev(&qdp->q)) {
+ *cpffp = 1;
+ cm_ClearPrefetchFlag(0, scp, &biod.offset);
+ }
+ lock_ReleaseMutex(&scp->mx);
+
+ /* and adjust counters */
nbytes -= temp;
-
+
/* and move to the next buffer */
- if (nbytes != 0) {
+ if (nbytes != 0) {
qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
if (qdp) {
- tbufp = osi_GetQData(qdp);
+ tbufp = osi_GetQData(qdp);
bufferp = tbufp->datap;
}
else
bufferp = NULL;
- } else
+ } else
bufferp += temp;
}
/* 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.
+ * 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.
*/
- /* bytes fetched */
+ /* bytes fetched */
rbytes = bufferp - tbufp->datap;
- /* bytes left to zero */
+ /* bytes left to zero */
rbytes = buf_bufferSize - rbytes;
while(qdp) {
if (rbytes != 0)
- memset(bufferp, 0, rbytes);
+ memset(bufferp, 0, rbytes);
qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
- if (qdp == NULL)
+ if (qdp == NULL)
break;
- tbufp = osi_GetQData(qdp);
+ tbufp = osi_GetQData(qdp);
bufferp = tbufp->datap;
- /* bytes to clear in this page */
- rbytes = buf_bufferSize;
- }
- }
+ /* bytes to clear in this page */
+ rbytes = buf_bufferSize;
+ }
+ }
- if (code == 0)
- code = EndRXAFS_FetchData(callp, &afsStatus, &callback, &volSync);
- else
- osi_Log0(afsd_logp, "CALL EndRXAFS_FetchData skipped due to error");
+ if (code == 0)
+ code = EndRXAFS_FetchData(callp, &afsStatus, &callback, &volSync);
+ else
+ osi_Log0(afsd_logp, "CALL EndRXAFS_FetchData skipped due to error");
code = rx_EndCall(callp, code);
if (code == RXKADUNKNOWNKEY)
osi_Log0(afsd_logp, "CALL EndCall returns RXKADUNKNOWNKEY");
osi_Log0(afsd_logp, "CALL FetchData DONE");
- } while (cm_Analyze(connp, up, reqp, &scp->fid, &volSync, NULL, code));
+ } while (cm_Analyze(connp, up, reqp, &scp->fid, &volSync, NULL, NULL, code));
fetchingcompleted:
code = cm_MapRPCError(code, reqp);
lock_ObtainMutex(&scp->mx);
- /* 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
- * read.
+ /* 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
+ * read.
*/
- if (code == 0) {
- for(qdp = biod.bufListp;
- qdp;
- qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
- tbufp = osi_GetQData(qdp);
+ if (code == 0) {
+ for(qdp = biod.bufListp;
+ qdp;
+ qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
+ tbufp = osi_GetQData(qdp);
tbufp->dataVersion = afsStatus.DataVersion;
#ifdef DISKCACHE95
}
}
- /* release scatter/gather I/O structure (buffers, locks) */
- lock_ReleaseMutex(&scp->mx);
- cm_ReleaseBIOD(&biod, 0);
- lock_ObtainMutex(&scp->mx);
+ /* release scatter/gather I/O structure (buffers, locks) */
+ lock_ReleaseMutex(&scp->mx);
+ cm_ReleaseBIOD(&biod, 0);
+ lock_ObtainMutex(&scp->mx);
if (code == 0)
cm_MergeStatus(scp, &afsStatus, &volSync, up, 0);
- return code;
+ return code;
}