void cm_BkgDaemon(void * parm)
{
cm_bkgRequest_t *rp;
afs_int32 code;
char name[32] = "";
long daemonID = (long)parm;
snprintf(name, sizeof(name), "cm_BkgDaemon_ShutdownEvent%d", daemonID);
cm_BkgDaemon_ShutdownEvent[daemonID] = thrd_CreateEvent(NULL, FALSE, FALSE, name);
if ( GetLastError() == ERROR_ALREADY_EXISTS )
afsi_log("Event Object Already Exists: %s", name);
rx_StartClientThread();
lock_ObtainWrite(&cm_daemonLock);
while (daemon_ShutdownFlag == 0) {
if (powerStateSuspended) {
Sleep(1000);
continue;
}
if (!cm_bkgListEndp) {
osi_SleepW((LONG_PTR)&cm_bkgListp, &cm_daemonLock);
lock_ObtainWrite(&cm_daemonLock);
continue;
}
/* we found a request */
for (rp = cm_bkgListEndp; rp; rp = (cm_bkgRequest_t *) osi_QPrev(&rp->q))
{
if (cm_ServerAvailable(&rp->scp->fid, rp->userp) &&
!(rp->scp->flags & CM_SCACHEFLAG_DATASTORING))
break;
}
if (rp == NULL) {
/* we couldn't find a request that we could process at the current time */
lock_ReleaseWrite(&cm_daemonLock);
Sleep(1000);
lock_ObtainWrite(&cm_daemonLock);
continue;
}
osi_QRemoveHT((osi_queue_t **) &cm_bkgListp, (osi_queue_t **) &cm_bkgListEndp, &rp->q);
osi_assertx(cm_bkgQueueCount-- > 0, "cm_bkgQueueCount 0");
lock_ReleaseWrite(&cm_daemonLock);
osi_Log1(afsd_logp,"cm_BkgDaemon processing request 0x%p", rp);
#ifdef DEBUG_REFCOUNT
osi_Log2(afsd_logp,"cm_BkgDaemon (before) scp 0x%x ref %d",rp->scp, rp->scp->refCount);
#endif
code = (*rp->procp)(rp->scp, rp->p1, rp->p2, rp->p3, rp->p4, rp->userp);
#ifdef DEBUG_REFCOUNT
osi_Log2(afsd_logp,"cm_BkgDaemon (after) scp 0x%x ref %d",rp->scp, rp->scp->refCount);
#endif
/*
* Keep the following list synchronized with the
* error code list in cm_BkgStore.
* cm_SyncOpDone(CM_SCACHESYNC_ASYNCSTORE) will be called there unless
* one of these errors has occurred.
*/
switch ( code ) {
case CM_ERROR_TIMEDOUT: /* or server restarting */
case CM_ERROR_RETRY:
case CM_ERROR_WOULDBLOCK:
case CM_ERROR_ALLBUSY:
case CM_ERROR_ALLDOWN:
case CM_ERROR_ALLOFFLINE:
case CM_ERROR_PARTIALWRITE:
if (rp->procp == cm_BkgStore) {
osi_Log2(afsd_logp,
"cm_BkgDaemon re-queueing failed request 0x%p code 0x%x",
rp, code);
lock_ObtainWrite(&cm_daemonLock);
cm_bkgQueueCount++;
osi_QAddT((osi_queue_t **) &cm_bkgListp, (osi_queue_t **)&cm_bkgListEndp, &rp->q);
break;
} /* otherwise fall through */
case 0: /* success */
default: /* other error */
if (code == 0)
osi_Log1(afsd_logp,"cm_BkgDaemon SUCCESS: request 0x%p", rp);
else
osi_Log2(afsd_logp,"cm_BkgDaemon FAILED: request dropped 0x%p code 0x%x",
rp, code);
cm_ReleaseUser(rp->userp);
cm_ReleaseSCache(rp->scp);
free(rp);
lock_ObtainWrite(&cm_daemonLock);
}
}
lock_ReleaseWrite(&cm_daemonLock);
thrd_SetEvent(cm_BkgDaemon_ShutdownEvent[daemonID]);
}
void * cm_BkgDaemon(void * vparm)
{
cm_bkgRequest_t *rp;
afs_int32 code;
char name[32] = "";
long daemonID = (long)(LONG_PTR)vparm;
snprintf(name, sizeof(name), "cm_BkgDaemon_ShutdownEvent%u", daemonID);
cm_BkgDaemon_ShutdownEvent[daemonID] = thrd_CreateEvent(NULL, FALSE, FALSE, name);
if ( GetLastError() == ERROR_ALREADY_EXISTS )
afsi_log("Event Object Already Exists: %s", name);
rx_StartClientThread();
lock_ObtainWrite(&cm_daemonLockp[daemonID]);
while (daemon_ShutdownFlag == 0) {
int willBlock = 0;
if (powerStateSuspended) {
Sleep(1000);
continue;
}
if (!cm_bkgListEndpp[daemonID]) {
osi_SleepW((LONG_PTR)&cm_bkgListpp[daemonID], &cm_daemonLockp[daemonID]);
lock_ObtainWrite(&cm_daemonLockp[daemonID]);
continue;
}
/* we found a request */
for (rp = cm_bkgListEndpp[daemonID]; rp; rp = (cm_bkgRequest_t *) osi_QPrev(&rp->q))
{
if (rp->scp->flags & CM_SCACHEFLAG_DELETED)
break;
/*
* If the request has active I/O such that this worker would
* be forced to block, leave the request in the queue and move
* on to one that might be available for servicing.
*/
if (cm_RequestWillBlock(rp)) {
willBlock++;
continue;
}
if (cm_ServerAvailable(&rp->scp->fid, rp->userp))
break;
}
if (rp == NULL) {
/*
* Couldn't find a request that we could process at the
* current time. If there were requests that would cause
* the worker to block, sleep for 25ms so it can promptly
* respond when it is available. Otherwise, sleep for 1s.
*
* This polling cycle needs to be replaced with a proper
* producer/consumer dynamic worker pool.
*/
osi_Log2(afsd_logp,"cm_BkgDaemon[%u] sleeping %dms all tasks would block",
daemonID, willBlock ? 100 : 1000);
lock_ReleaseWrite(&cm_daemonLockp[daemonID]);
Sleep(willBlock ? 100 : 1000);
lock_ObtainWrite(&cm_daemonLockp[daemonID]);
continue;
}
osi_QRemoveHT((osi_queue_t **) &cm_bkgListpp[daemonID], (osi_queue_t **) &cm_bkgListEndpp[daemonID], &rp->q);
osi_assertx(cm_bkgQueueCountp[daemonID]-- > 0, "cm_bkgQueueCount 0");
lock_ReleaseWrite(&cm_daemonLockp[daemonID]);
osi_Log2(afsd_logp,"cm_BkgDaemon[%u] processing request 0x%p", daemonID, rp);
if (rp->scp->flags & CM_SCACHEFLAG_DELETED) {
osi_Log2(afsd_logp,"cm_BkgDaemon[%u] DELETED scp 0x%x", daemonID, rp->scp);
code = CM_ERROR_BADFD;
} else {
#ifdef DEBUG_REFCOUNT
osi_Log3(afsd_logp,"cm_BkgDaemon[%u] (before) scp 0x%x ref %d", daemonID, rp->scp, rp->scp->refCount);
#endif
code = (*rp->procp)(rp->scp, rp->p1, rp->p2, rp->p3, rp->p4, rp->userp, &rp->req);
#ifdef DEBUG_REFCOUNT
osi_Log3(afsd_logp,"cm_BkgDaemon[%u] (after) scp 0x%x ref %d", daemonID, rp->scp, rp->scp->refCount);
#endif
}
/*
* Keep the following list synchronized with the
* error code list in cm_BkgStore.
* cm_SyncOpDone(CM_SCACHESYNC_ASYNCSTORE) will be called there unless
* one of these errors has occurred.
*/
switch ( code ) {
case CM_ERROR_TIMEDOUT: /* or server restarting */
case CM_ERROR_RETRY:
case CM_ERROR_WOULDBLOCK:
case CM_ERROR_ALLBUSY:
case CM_ERROR_ALLDOWN:
case CM_ERROR_ALLOFFLINE:
case CM_ERROR_PARTIALWRITE:
if (rp->procp == cm_BkgStore ||
rp->procp == RDR_BkgFetch) {
osi_Log3(afsd_logp,
"cm_BkgDaemon[%u] re-queueing failed request 0x%p code 0x%x",
daemonID, rp, code);
lock_ObtainWrite(&cm_daemonLockp[daemonID]);
cm_bkgQueueCountp[daemonID]++;
osi_QAddT((osi_queue_t **) &cm_bkgListpp[daemonID], (osi_queue_t **)&cm_bkgListEndpp[daemonID], &rp->q);
break;
} /* otherwise fall through */
case 0: /* success */
default: /* other error */
if (code == 0) {
osi_Log2(afsd_logp,"cm_BkgDaemon[%u] SUCCESS: request 0x%p", daemonID, rp);
} else {
osi_Log3(afsd_logp,"cm_BkgDaemon[%u] FAILED: request dropped 0x%p code 0x%x",
daemonID, rp, code);
}
cm_ReleaseUser(rp->userp);
cm_ReleaseSCache(rp->scp);
free(rp);
lock_ObtainWrite(&cm_daemonLockp[daemonID]);
}
}
lock_ReleaseWrite(&cm_daemonLockp[daemonID]);
thrd_SetEvent(cm_BkgDaemon_ShutdownEvent[daemonID]);
pthread_exit(NULL);
return NULL;
}
