pdmnetshaperint.h revision 742b31f1e455bd8bfdd9275536f356f7f3c50313
/* $Id$ */
/** @file
* PDM Network Shaper - Internal data structures and functions common for both
* R0 and R3 parts.
*/
/*
* Copyright (C) 2011-2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/**
* Bandwidth group instance data
*/
typedef struct PDMNSBWGROUP
{
/** Pointer to the next group in the list. */
struct PDMNSBWGROUP *pNext;
/** Pointer to the shared UVM structure. */
struct PDMNETSHAPER *pShaper;
/** Critical section protecting all members below. */
/** Pointer to the first filter attached to this group. */
struct PDMNSFILTER *pFiltersHead;
/** Bandwidth group name. */
char *pszName;
/** Maximum number of bytes filters are allowed to transfer. */
volatile uint64_t cbTransferPerSecMax;
/** Number of bytes we are allowed to transfer in one burst. */
volatile uint32_t cbBucketSize;
/** Number of bytes we were allowed to transfer at the last update. */
volatile uint32_t cbTokensLast;
/** Timestamp of the last update */
volatile uint64_t tsUpdatedLast;
/** Reference counter - How many filters are associated with this group. */
} PDMNSBWGROUP;
/** Pointer to a bandwidth group. */
typedef PDMNSBWGROUP *PPDMNSBWGROUP;
{
AssertPtrReturn(pFilter, true);
return true;
return true;
bool fAllowed = true;
if (pBwGroup->cbTransferPerSecMax)
{
/* Re-fill the bucket first */
uint32_t uTokensAdded = (tsNow - pBwGroup->tsUpdatedLast)*pBwGroup->cbTransferPerSecMax/(1000*1000*1000);
if (cbTransfer > uTokens)
{
fAllowed = false;
}
else
{
}
}
else
return fAllowed;
}