/*
* performs all necessary setup required for Greenplum Database mode.
*
* This includes cdblink_setup() and initializing the Motion Layer.
*/
void
cdb_setup(void)
{
elog(DEBUG1, "Initializing Greenplum components...");
cdblink_setup();
/* If gp_role is UTILITY, skip this call. */
if (Gp_role != GP_ROLE_UTILITY)
{
/* Initialize the Motion Layer IPC subsystem. */
InitMotionLayerIPC();
}
if (Gp_role == GP_ROLE_DISPATCH)
{
/* check mirrored entry db configuration */
buildMirrorQDDefinition();
if (isQDMirroringPendingCatchup())
{
/*
* Do a checkpoint to cause a checkpoint xlog record to
* to be written and force the QD mirror to get
* synchronized.
*/
RequestCheckpoint(true, false);
}
/*
* This call will generate a warning if master mirroring
* is not synchronized.
*/
QDMirroringWriteCheck();
}
}
FaultInjectorType_e
FaultInjector_InjectFaultIfSet(
FaultInjectorIdentifier_e identifier,
DDLStatement_e ddlStatement,
char* databaseName,
char* tableName)
{
FaultInjectorEntry_s *entryShared, localEntry,
*entryLocal = &localEntry;
char databaseNameLocal[NAMEDATALEN];
char tableNameLocal[NAMEDATALEN];
int ii = 0;
int cnt = 3600;
/*
* Return immediately if no fault has been injected ever. It is
* important to not touch the spinlock, especially if this is the
* postmaster process. If one of the backend processes dies while
* holding the spin lock, and postmaster comes here before resetting
* the shared memory, it waits without holder process and eventually
* goes into PANIC. Also this saves a few cycles to acquire the spin
* lock and look into the shared hash table.
*
* Although this is a race condition without lock, a false negative is
* ok given this framework is purely for dev/testing.
*/
if (faultInjectorShmem->faultInjectorSlots == 0)
return FALSE;
getFileRepRoleAndState(&fileRepRole, &segmentState, &dataState, NULL, NULL);
FiLockAcquire();
entryShared = FaultInjector_LookupHashEntry(identifier);
if (entryShared != NULL)
memcpy(entryLocal, entryShared, sizeof(FaultInjectorEntry_s));
FiLockRelease();
/* Verify if fault injection is set */
if (entryShared == NULL)
/* fault injection is not set */
return FALSE;
if (entryLocal->ddlStatement != ddlStatement)
/* fault injection is not set for the specified DDL */
return FALSE;
snprintf(databaseNameLocal, sizeof(databaseNameLocal), "%s", databaseName);
if (strcmp(entryLocal->databaseName, databaseNameLocal) != 0)
/* fault injection is not set for the specified database name */
return FALSE;
snprintf(tableNameLocal, sizeof(tableNameLocal), "%s", tableName);
if (strcmp(entryLocal->tableName, tableNameLocal) != 0)
/* fault injection is not set for the specified table name */
return FALSE;
if (entryLocal->faultInjectorState == FaultInjectorStateTriggered ||
entryLocal->faultInjectorState == FaultInjectorStateCompleted ||
entryLocal->faultInjectorState == FaultInjectorStateFailed) {
/* fault injection was already executed */
return FALSE;
}
/* Update the injection fault entry in hash table */
if (entryLocal->occurrence != FILEREP_UNDEFINED)
{
if (entryLocal->occurrence > 1)
{
entryLocal->occurrence--;
FaultInjector_UpdateHashEntry(entryLocal);
return FALSE;
}
entryLocal->faultInjectorState = FaultInjectorStateTriggered;
FaultInjector_UpdateHashEntry(entryLocal);
}
/* Inject fault */
switch (entryLocal->faultInjectorType) {
case FaultInjectorTypeNotSpecified:
break;
case FaultInjectorTypeSleep:
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
pg_usleep(entryLocal->sleepTime * 1000000L);
break;
case FaultInjectorTypeFault:
switch (entryLocal->faultInjectorIdentifier)
{
case FileRepConsumer:
case FileRepConsumerVerification:
case FileRepSender:
case FileRepReceiver:
case FileRepResync:
case FileRepResyncInProgress:
case FileRepResyncWorker:
case FileRepResyncWorkerRead:
case FileRepTransitionToInResyncMirrorReCreate:
case FileRepTransitionToInResyncMarkReCreated:
case FileRepTransitionToInResyncMarkCompleted:
case FileRepTransitionToInSyncBegin:
case FileRepTransitionToInSync:
case FileRepTransitionToInSyncMarkCompleted:
case FileRepTransitionToInSyncBeforeCheckpoint:
case FileRepIsOperationCompleted:
FileRep_SetSegmentState(SegmentStateFault, FaultTypeMirror);
break;
case FileRepTransitionToChangeTracking:
FileRep_SetPostmasterReset();
break;
default:
FileRep_SetSegmentState(SegmentStateFault, FaultTypeIO);
break;
}
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
break;
case FaultInjectorTypeFatal:
/*
* If it's one time occurrence then disable the fault before it's
* actually triggered because this fault errors out the transaction
* and hence we wont get a chance to disable it or put it in completed
* state.
*/
if (entryLocal->occurrence != FILEREP_UNDEFINED)
{
entryLocal->faultInjectorState = FaultInjectorStateCompleted;
FaultInjector_UpdateHashEntry(entryLocal);
}
ereport(FATAL,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
break;
case FaultInjectorTypePanic:
/*
* If it's one time occurrence then disable the fault before it's
* actually triggered because this fault errors out the transaction
* and hence we wont get a chance to disable it or put it in completed
* state. For PANIC it may be unnecessary though.
*/
if (entryLocal->occurrence != FILEREP_UNDEFINED)
{
entryLocal->faultInjectorState = FaultInjectorStateCompleted;
FaultInjector_UpdateHashEntry(entryLocal);
}
ereport(PANIC,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
break;
case FaultInjectorTypeError:
/*
* If it's one time occurrence then disable the fault before it's
* actually triggered because this fault errors out the transaction
* and hence we wont get a chance to disable it or put it in completed
* state.
*/
if (entryLocal->occurrence != FILEREP_UNDEFINED)
{
entryLocal->faultInjectorState = FaultInjectorStateCompleted;
FaultInjector_UpdateHashEntry(entryLocal);
}
ereport(ERROR,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
break;
case FaultInjectorTypeInfiniteLoop:
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
if (entryLocal->faultInjectorIdentifier == FileRepImmediateShutdownRequested)
cnt = entryLocal->sleepTime;
for (ii=0; ii < cnt; ii++)
{
pg_usleep(1000000L); // sleep for 1 sec (1 sec * 3600 = 1 hour)
getFileRepRoleAndState(NULL, &segmentState, NULL, NULL, NULL);
if ((entryLocal->faultInjectorIdentifier != FileRepImmediateShutdownRequested) &&
(segmentState == SegmentStateShutdownFilerepBackends ||
segmentState == SegmentStateImmediateShutdown ||
segmentState == SegmentStateShutdown ||
IsFtsShudownRequested()))
{
break;
}
}
break;
case FaultInjectorTypeDataCorruption:
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
break;
case FaultInjectorTypeSuspend:
{
FaultInjectorEntry_s *entry;
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
while ((entry = FaultInjector_LookupHashEntry(entryLocal->faultInjectorIdentifier)) != NULL &&
entry->faultInjectorType != FaultInjectorTypeResume)
{
pg_usleep(1000000L); // 1 sec
}
if (entry != NULL)
{
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entry->faultInjectorType])));
}
else
{
ereport(LOG,
(errmsg("fault 'NULL', fault name:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier])));
/*
* Since the entry is gone already, we should NOT update
* the entry below. (There could be other places in this
* function that are under the same situation, but I'm too
* tired to look for them...)
*/
return entryLocal->faultInjectorType;
}
break;
}
case FaultInjectorTypeSkip:
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
break;
case FaultInjectorTypeMemoryFull:
{
char *buffer = NULL;
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
buffer = (char*) palloc(BLCKSZ);
while (buffer != NULL)
{
buffer = (char*) palloc(BLCKSZ);
}
break;
}
case FaultInjectorTypeReset:
case FaultInjectorTypeStatus:
ereport(LOG,
(errmsg("unexpected error, fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
Assert(0);
break;
case FaultInjectorTypeResume:
break;
case FaultInjectorTypeSegv:
{
*(int *) 0 = 1234;
break;
}
case FaultInjectorTypeInterrupt:
{
/*
* The place where this type of fault is injected must have
* has HOLD_INTERRUPTS() .. RESUME_INTERRUPTS() around it, otherwise
* the interrupt could be handled inside the fault injector itself
*/
ereport(LOG,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
InterruptPending = true;
QueryCancelPending = true;
break;
}
case FaultInjectorTypeCheckpointAndPanic:
{
if (entryLocal->occurrence != FILEREP_UNDEFINED)
{
entryLocal->faultInjectorState = FaultInjectorStateCompleted;
FaultInjector_UpdateHashEntry(entryLocal);
}
RequestCheckpoint(true, false);
ereport(PANIC,
(errmsg("fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
break;
}
default:
ereport(LOG,
(errmsg("unexpected error, fault triggered, fault name:'%s' fault type:'%s' ",
FaultInjectorIdentifierEnumToString[entryLocal->faultInjectorIdentifier],
FaultInjectorTypeEnumToString[entryLocal->faultInjectorType])));
Assert(0);
break;
}
if (entryLocal->occurrence != FILEREP_UNDEFINED)
{
entryLocal->faultInjectorState = FaultInjectorStateCompleted;
}
FaultInjector_UpdateHashEntry(entryLocal);
return (entryLocal->faultInjectorType);
}
/*
* Drop a table space
*
* Be careful to check that the tablespace is empty.
*/
void
DropTableSpace(DropTableSpaceStmt *stmt)
{
#ifdef HAVE_SYMLINK
char *tablespacename = stmt->tablespacename;
HeapScanDesc scandesc;
Relation rel;
HeapTuple tuple;
ScanKeyData entry[1];
Oid tablespaceoid;
/*
* Find the target tuple
*/
rel = heap_open(TableSpaceRelationId, RowExclusiveLock);
ScanKeyInit(&entry[0],
Anum_pg_tablespace_spcname,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(tablespacename));
scandesc = heap_beginscan_catalog(rel, 1, entry);
tuple = heap_getnext(scandesc, ForwardScanDirection);
if (!HeapTupleIsValid(tuple))
{
if (!stmt->missing_ok)
{
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("tablespace \"%s\" does not exist",
tablespacename)));
}
else
{
ereport(NOTICE,
(errmsg("tablespace \"%s\" does not exist, skipping",
tablespacename)));
/* XXX I assume I need one or both of these next two calls */
heap_endscan(scandesc);
heap_close(rel, NoLock);
}
return;
}
tablespaceoid = HeapTupleGetOid(tuple);
/* Must be tablespace owner */
if (!pg_tablespace_ownercheck(tablespaceoid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_TABLESPACE,
tablespacename);
/* Disallow drop of the standard tablespaces, even by superuser */
if (tablespaceoid == GLOBALTABLESPACE_OID ||
tablespaceoid == DEFAULTTABLESPACE_OID)
aclcheck_error(ACLCHECK_NO_PRIV, ACL_KIND_TABLESPACE,
tablespacename);
/* DROP hook for the tablespace being removed */
InvokeObjectDropHook(TableSpaceRelationId, tablespaceoid, 0);
/*
* Remove the pg_tablespace tuple (this will roll back if we fail below)
*/
simple_heap_delete(rel, &tuple->t_self);
heap_endscan(scandesc);
/*
* Remove any comments or security labels on this tablespace.
*/
DeleteSharedComments(tablespaceoid, TableSpaceRelationId);
DeleteSharedSecurityLabel(tablespaceoid, TableSpaceRelationId);
/*
* Remove dependency on owner.
*/
deleteSharedDependencyRecordsFor(TableSpaceRelationId, tablespaceoid, 0);
/*
* Acquire TablespaceCreateLock to ensure that no TablespaceCreateDbspace
* is running concurrently.
*/
LWLockAcquire(TablespaceCreateLock, LW_EXCLUSIVE);
/*
* Try to remove the physical infrastructure.
*/
if (!destroy_tablespace_directories(tablespaceoid, false))
{
/*
* Not all files deleted? However, there can be lingering empty files
* in the directories, left behind by for example DROP TABLE, that
* have been scheduled for deletion at next checkpoint (see comments
* in mdunlink() for details). We could just delete them immediately,
* but we can't tell them apart from important data files that we
* mustn't delete. So instead, we force a checkpoint which will clean
* out any lingering files, and try again.
*
* XXX On Windows, an unlinked file persists in the directory listing
* until no process retains an open handle for the file. The DDL
* commands that schedule files for unlink send invalidation messages
* directing other PostgreSQL processes to close the files. DROP
* TABLESPACE should not give up on the tablespace becoming empty
* until all relevant invalidation processing is complete.
*/
RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
if (!destroy_tablespace_directories(tablespaceoid, false))
{
/* Still not empty, the files must be important then */
ereport(ERROR,
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
errmsg("tablespace \"%s\" is not empty",
tablespacename)));
}
}
/* Record the filesystem change in XLOG */
{
xl_tblspc_drop_rec xlrec;
xlrec.ts_id = tablespaceoid;
XLogBeginInsert();
XLogRegisterData((char *) &xlrec, sizeof(xl_tblspc_drop_rec));
(void) XLogInsert(RM_TBLSPC_ID, XLOG_TBLSPC_DROP);
}
/*
* Note: because we checked that the tablespace was empty, there should be
* no need to worry about flushing shared buffers or free space map
* entries for relations in the tablespace.
*/
/*
* Force synchronous commit, to minimize the window between removing the
* files on-disk and marking the transaction committed. It's not great
* that there is any window at all, but definitely we don't want to make
* it larger than necessary.
*/
ForceSyncCommit();
/*
* Allow TablespaceCreateDbspace again.
*/
LWLockRelease(TablespaceCreateLock);
/* We keep the lock on pg_tablespace until commit */
heap_close(rel, NoLock);
#else /* !HAVE_SYMLINK */
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("tablespaces are not supported on this platform")));
#endif /* HAVE_SYMLINK */
}
