reg_perfcount.c

samba-3.0.22.tar.gz 编译smb服务器的源码

	return True;
}

/*********************************************************************
*********************************************************************/

static void _reg_perfcount_init_data_block(PERF_DATA_BLOCK *block, prs_struct *ps, TDB_CONTEXT *names)
{
	wpstring temp;
	time_t tm;
 
	memset(temp, 0, sizeof(temp));
	rpcstr_push((void *)temp, "PERF", sizeof(temp), STR_TERMINATE);
	memcpy(block->Signature, temp, strlen_w(temp) *2);

	if(ps->bigendian_data == RPC_BIG_ENDIAN)
		block->LittleEndian = 0;
	else
		block->LittleEndian = 1;
	block->Version = 1;
	block->Revision = 1;
	block->TotalByteLength = 0;
	block->NumObjectTypes = 0;
	block->DefaultObject = -1;
	block->objects = NULL;
	tm = time(NULL);
	make_systemtime(&(block->SystemTime), gmtime(&tm));
	_reg_perfcount_init_data_block_perf(block, names);
	memset(temp, 0, sizeof(temp));
	rpcstr_push((void *)temp, global_myname(), sizeof(temp), STR_TERMINATE);
	block->SystemNameLength = (strlen_w(temp) * 2) + 2;
	block->data = TALLOC_ZERO_ARRAY(ps->mem_ctx, uint8, block->SystemNameLength + (8 - (block->SystemNameLength % 8)));
	memcpy(block->data, temp, block->SystemNameLength);
	block->SystemNameOffset = sizeof(PERF_DATA_BLOCK) - sizeof(block->objects) - sizeof(block->data); 
	block->HeaderLength = block->SystemNameOffset + block->SystemNameLength;
	/* Make sure to adjust for 64-bit alignment for when we finish writing the system name,
	   so that the PERF_OBJECT_TYPE struct comes out 64-bit aligned */
	block->HeaderLength += 8 - (block->HeaderLength % 8);

	return;
}

/*********************************************************************
*********************************************************************/

static uint32 _reg_perfcount_perf_data_block_fixup(PERF_DATA_BLOCK *block, prs_struct *ps)
{
	int obj, cnt, inst, pad, i;
	PERF_OBJECT_TYPE *object;
	PERF_INSTANCE_DEFINITION *instance;
	PERF_COUNTER_DEFINITION *counter;
	PERF_COUNTER_BLOCK *counter_data;
	char *temp = NULL, *src_addr, *dst_addr;

	block->TotalByteLength = 0;
	object = block->objects;
	for(obj = 0; obj < block->NumObjectTypes; obj++)
	{
		object[obj].TotalByteLength = 0;
		object[obj].DefinitionLength = 0;
		instance = object[obj].instances;
		counter = object[obj].counters;
		for(cnt = 0; cnt < object[obj].NumCounters; cnt++)
		{
			object[obj].TotalByteLength += counter[cnt].ByteLength;
			object[obj].DefinitionLength += counter[cnt].ByteLength;
		}
		if(object[obj].NumInstances != PERF_NO_INSTANCES)
		{
			for(inst = 0; inst < object[obj].NumInstances; inst++)
			{
				instance = &(object[obj].instances[inst]);
				object[obj].TotalByteLength += instance->ByteLength;
				counter_data = &(instance->counter_data);
				counter = &(object[obj].counters[object[obj].NumCounters - 1]);
				counter_data->ByteLength = counter->CounterOffset + counter->CounterSize + sizeof(counter_data->ByteLength);
				temp = TALLOC_REALLOC_ARRAY(ps->mem_ctx, 
							    temp, 
							    char, 
							    counter_data->ByteLength- sizeof(counter_data->ByteLength));
				memset(temp, 0, counter_data->ByteLength - sizeof(counter_data->ByteLength));
				src_addr = (char *)counter_data->data;
				for(i = 0; i < object[obj].NumCounters; i++)
				{
					counter = &(object[obj].counters[i]);
					dst_addr = temp + counter->CounterOffset - sizeof(counter_data->ByteLength);
					memcpy(dst_addr, src_addr, counter->CounterSize);
				        src_addr += counter->CounterSize;
				}
				/* Make sure to be 64-bit aligned */
				if((pad = (counter_data->ByteLength % 8)))
				{
					pad = 8 - pad;
				}
				counter_data->data = TALLOC_REALLOC_ARRAY(ps->mem_ctx,
									 counter_data->data,
									 uint8,
									 counter_data->ByteLength - sizeof(counter_data->ByteLength) + pad);
				memset(counter_data->data, 0, counter_data->ByteLength - sizeof(counter_data->ByteLength) + pad);
				memcpy(counter_data->data, temp, counter_data->ByteLength - sizeof(counter_data->ByteLength));
				counter_data->ByteLength += pad;
				object[obj].TotalByteLength += counter_data->ByteLength;
			}
		}
		else
		{
			/* Need to be 64-bit aligned at the end of the counter_data block, so pad counter_data to a 64-bit boundary,
			   so that the next PERF_OBJECT_TYPE can start on a 64-bit alignment */
			if((pad = (object[obj].counter_data.ByteLength % 8)))
			{
				pad = 8 - pad;
				object[obj].counter_data.data = TALLOC_REALLOC_ARRAY(ps->mem_ctx, 
										     object[obj].counter_data.data,
										     uint8, 
										     object[obj].counter_data.ByteLength + pad);
				memset((void *)(object[obj].counter_data.data + object[obj].counter_data.ByteLength), 0, pad);
				object[obj].counter_data.ByteLength += pad;
			}
			object[obj].TotalByteLength += object[obj].counter_data.ByteLength;
		}
		object[obj].HeaderLength = sizeof(*object) - (sizeof(counter) + sizeof(instance) + sizeof(PERF_COUNTER_BLOCK));
		object[obj].TotalByteLength += object[obj].HeaderLength;
		object[obj].DefinitionLength += object[obj].HeaderLength;
		
		block->TotalByteLength += object[obj].TotalByteLength;
	}

	return block->TotalByteLength;
}

/*********************************************************************
*********************************************************************/

uint32 reg_perfcount_get_perf_data_block(uint32 base_index, 
					 prs_struct *ps, 
					 PERF_DATA_BLOCK *block,
					 char *object_ids)
{
	uint32 buffer_size = 0, last_counter;
	const char *fname = counters_directory( NAMES_DB );
	TDB_CONTEXT *names;
	int retval;
	
	names = tdb_open_log(fname, 0, TDB_DEFAULT, O_RDONLY, 0444);

	if(names == NULL)
	{
		DEBUG(1, ("reg_perfcount_get_perf_data_block: unable to open [%s].\n", fname));
		return 0;
	}

	_reg_perfcount_init_data_block(block, ps, names);

	last_counter = reg_perfcount_get_last_counter(base_index);
    
	if(object_ids == NULL)
	{
		/* we're getting a request for "Global" here */
		retval = _reg_perfcount_assemble_global(block, ps, base_index, names);
	}
	else
	{
		/* we're getting a request for a specific set of PERF_OBJECT_TYPES */
		retval = _reg_perfcount_assemble_global(block, ps, base_index, names);
	}
	buffer_size = _reg_perfcount_perf_data_block_fixup(block, ps);

	tdb_close(names);

	return buffer_size + block->HeaderLength;
}

/*********************************************************************
*********************************************************************/

static BOOL _reg_perfcount_marshall_perf_data_block(prs_struct *ps, PERF_DATA_BLOCK block, int depth)
{
	int i;
	prs_debug(ps, depth, "", "_reg_perfcount_marshall_perf_data_block");
	depth++;

	if(!prs_align(ps))
		return False;
	for(i = 0; i < 4; i++)
	{
		if(!prs_uint16("Signature", ps, depth, &block.Signature[i]))
			return False;
	}
	if(!prs_uint32("Little Endian", ps, depth, &block.LittleEndian))
		return False;
	if(!prs_uint32("Version", ps, depth, &block.Version))
		return False;
	if(!prs_uint32("Revision", ps, depth, &block.Revision))
		return False;
	if(!prs_uint32("TotalByteLength", ps, depth, &block.TotalByteLength))
		return False;
	if(!prs_uint32("HeaderLength", ps, depth, &block.HeaderLength))
		return False;
	if(!prs_uint32("NumObjectTypes", ps, depth, &block.NumObjectTypes))
		return False;
	if(!prs_uint32("DefaultObject", ps, depth, &block.DefaultObject))
		return False;
	if(!spoolss_io_system_time("SystemTime", ps, depth, &block.SystemTime))
		return False;
	if(!prs_uint32("Padding", ps, depth, &block.Padding))
		return False;
	if(!prs_align_uint64(ps))
		return False;
	if(!prs_uint64("PerfTime", ps, depth, &block.PerfTime))
		return False;
	if(!prs_uint64("PerfFreq", ps, depth, &block.PerfFreq))
		return False;
	if(!prs_uint64("PerfTime100nSec", ps, depth, &block.PerfTime100nSec))
		return False;
	if(!prs_uint32("SystemNameLength", ps, depth, &block.SystemNameLength))
		return False;
	if(!prs_uint32("SystemNameOffset", ps, depth, &block.SystemNameOffset))
		return False;
	/* hack to make sure we're 64-bit aligned at the end of this whole mess */
	if(!prs_uint8s(False, "SystemName", ps, depth, block.data, 
		       block.HeaderLength - block.SystemNameOffset)) 
		return False;

	return True;
}

/*********************************************************************
*********************************************************************/

static BOOL _reg_perfcount_marshall_perf_counters(prs_struct *ps,
						  PERF_OBJECT_TYPE object,
						  int depth)
{
	int cnt;
	PERF_COUNTER_DEFINITION counter;

	prs_debug(ps, depth, "", "_reg_perfcount_marshall_perf_counters");
	depth++;
    
	for(cnt = 0; cnt < object.NumCounters; cnt++)
	{
		counter = object.counters[cnt];

		if(!prs_align(ps))
			return False;
		if(!prs_uint32("ByteLength", ps, depth, &counter.ByteLength))
			return False;
		if(!prs_uint32("CounterNameTitleIndex", ps, depth, &counter.CounterNameTitleIndex))
			return False;
		if(!prs_uint32("CounterNameTitlePointer", ps, depth, &counter.CounterNameTitlePointer))
			return False;
		if(!prs_uint32("CounterHelpTitleIndex", ps, depth, &counter.CounterHelpTitleIndex))
			return False;
		if(!prs_uint32("CounterHelpTitlePointer", ps, depth, &counter.CounterHelpTitlePointer))
			return False;
		if(!prs_uint32("DefaultScale", ps, depth, &counter.DefaultScale))
			return False;
		if(!prs_uint32("DetailLevel", ps, depth, &counter.DetailLevel))
			return False;
		if(!prs_uint32("CounterType", ps, depth, &counter.CounterType))
			return False;
		if(!prs_uint32("CounterSize", ps, depth, &counter.CounterSize))
			return False;
		if(!prs_uint32("CounterOffset", ps, depth, &counter.CounterOffset))
			return False;
	}

	return True;
}

/*********************************************************************
*********************************************************************/

static BOOL _reg_perfcount_marshall_perf_counter_data(prs_struct *ps, 
						      PERF_COUNTER_BLOCK counter_data, 
						      int depth)
{
	prs_debug(ps, depth, "", "_reg_perfcount_marshall_perf_counter_data");
	depth++;
    
	if(!prs_align_uint64(ps))
		return False;
    
	if(!prs_uint32("ByteLength", ps, depth, &counter_data.ByteLength))
		return False;
	if(!prs_uint8s(False, "CounterData", ps, depth, counter_data.data, counter_data.ByteLength - sizeof(uint32)))
		return False;
	if(!prs_align_uint64(ps))
		return False;

	return True;
}

/*********************************************************************
*********************************************************************/

static BOOL _reg_perfcount_marshall_perf_instances(prs_struct *ps,
						   PERF_OBJECT_TYPE object, 
						   int depth)
{
	PERF_INSTANCE_DEFINITION instance;
	int inst;

	prs_debug(ps, depth, "", "_reg_perfcount_marshall_perf_instances");
	depth++;

	for(inst = 0; inst < object.NumInstances; inst++)
	{
		instance = object.instances[inst];

		if(!prs_align(ps))
			return False;
		if(!prs_uint32("ByteLength", ps, depth, &instance.ByteLength))
			return False;
		if(!prs_uint32("ParentObjectTitleIndex", ps, depth, &instance.ParentObjectTitleIndex))
			return False;
		if(!prs_uint32("ParentObjectTitlePointer", ps, depth, &instance.ParentObjectTitlePointer))
			return False;
		if(!prs_uint32("UniqueID", ps, depth, &instance.UniqueID))
			return False;
		if(!prs_uint32("NameOffset", ps, depth, &instance.NameOffset))
			return False;
		if(!prs_uint32("NameLength", ps, depth, &instance.NameLength))
			return False;
		if(!prs_uint8s(False, "InstanceName", ps, depth, instance.data,
			       instance.ByteLength - instance.NameOffset))
			return False;
		if(_reg_perfcount_marshall_perf_counter_data(ps, instance.counter_data, depth) == False)
			return False;
	}
	
	return True;
}

/*********************************************************************
*********************************************************************/

static BOOL _reg_perfcount_marshall_perf_objects(prs_struct *ps, PERF_DATA_BLOCK block, int depth)
{
	int obj;

	PERF_OBJECT_TYPE object;
    
	prs_debug(ps, depth, "", "_reg_perfcount_marshall_perf_objects");
	depth++;

	for(obj = 0; obj < block.NumObjectTypes; obj++)
	{
		object = block.objects[obj];

		if(!prs_align(ps))
			return False;

		if(!prs_uint32("TotalByteLength", ps, depth, &object.TotalByteLength))
			return False;
		if(!prs_uint32("DefinitionLength", ps, depth, &object.DefinitionLength))
			return False;
		if(!prs_uint32("HeaderLength", ps, depth, &object.HeaderLength))
			return False;
		if(!prs_uint32("ObjectNameTitleIndex", ps, depth, &object.ObjectNameTitleIndex))
			return False;
		if(!prs_uint32("ObjectNameTitlePointer", ps, depth, &object.ObjectNameTitlePointer))
			return False;
		if(!prs_uint32("ObjectHelpTitleIndex", ps, depth, &object.ObjectHelpTitleIndex))
			return False;
		if(!prs_uint32("ObjectHelpTitlePointer", ps, depth, &object.ObjectHelpTitlePointer))
			return False;
		if(!prs_uint32("DetailLevel", ps, depth, &object.DetailLevel))
			return False;
		if(!prs_uint32("NumCounters", ps, depth, &object.NumCounters))
			return False;
		if(!prs_uint32("DefaultCounter", ps, depth, &object.DefaultCounter))
			return False;
		if(!prs_uint32("NumInstances", ps, depth, &object.NumInstances))
			return False;
		if(!prs_uint32("CodePage", ps, depth, &object.CodePage))
			return False;
		if(!prs_align_uint64(ps))
			return False;
		if(!prs_uint64("PerfTime", ps, depth, &object.PerfTime))
			return False;
		if(!prs_uint64("PerfFreq", ps, depth, &object.PerfFreq))
			return False;

		/* Now do the counters */
		/* If no instances, encode counter_data */
		/* If instances, encode instace plus counter data for each instance */
		if(_reg_perfcount_marshall_perf_counters(ps, object, depth) == False)
			return False;
		if(object.NumInstances == PERF_NO_INSTANCES)
		{
			if(_reg_perfcount_marshall_perf_counter_data(ps, object.counter_data, depth) == False)
				return False;
		}
		else
		{
			if(_reg_perfcount_marshall_perf_instances(ps, object, depth) == False)
				return False;
		}
	}

	return True;
}

/*********************************************************************
*********************************************************************/

static BOOL _reg_perfcount_marshall_hkpd(prs_struct *ps, PERF_DATA_BLOCK block)
{
	int depth = 0;
	if(_reg_perfcount_marshall_perf_data_block(ps, block, depth) == True)
	{
		if(_reg_perfcount_marshall_perf_objects(ps, block, depth) == True)
			return True;
	}
	return False;
}

/*********************************************************************
*********************************************************************/

WERROR reg_perfcount_get_hkpd(prs_struct *ps, uint32 max_buf_size, uint32 *outbuf_len, char *object_ids)
{
	/*
	 * For a detailed description of the layout of this structure,
	 * see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/base/performance_data_format.asp
	 */
	PERF_DATA_BLOCK block;
	uint32 buffer_size, base_index; 
    
	buffer_size = 0;
	base_index = reg_perfcount_get_base_index();
	ZERO_STRUCT(block);

	buffer_size = reg_perfcount_get_perf_data_block(base_index, ps, &block, object_ids);

	if(buffer_size < max_buf_size)
	{
		*outbuf_len = buffer_size;
		if(_reg_perfcount_marshall_hkpd(ps, block) == True)
			return WERR_OK;
		else
			return WERR_NOMEM;
	}
	else
	{
		*outbuf_len = max_buf_size;
		_reg_perfcount_marshall_perf_data_block(ps, block, 0);
		return WERR_INSUFFICIENT_BUFFER;
	}
}