/* $Id: VBoxModBallooning.cpp 62471 2016-07-22 18:04:30Z vboxsync $ */ /** @file * VBoxModBallooning - Module for handling the automatic ballooning of VMs. */ /* * Copyright (C) 2011-2016 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * 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. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #ifndef VBOX_ONLY_DOCS # include #endif /* !VBOX_ONLY_DOCS */ #include "VBoxWatchdogInternal.h" #include using namespace com; #define VBOX_MOD_BALLOONING_NAME "balloon" /********************************************************************************************************************************* * Local Structures * *********************************************************************************************************************************/ /** * The module's RTGetOpt-IDs for the command line. */ enum GETOPTDEF_BALLOONCTRL { GETOPTDEF_BALLOONCTRL_BALLOONINC = 2000, GETOPTDEF_BALLOONCTRL_BALLOONDEC, GETOPTDEF_BALLOONCTRL_BALLOONLOWERLIMIT, GETOPTDEF_BALLOONCTRL_BALLOONMAX, GETOPTDEF_BALLOONCTRL_BALLOONSAFETY, GETOPTDEF_BALLOONCTRL_TIMEOUTMS, GETOPTDEF_BALLOONCTRL_GROUPS }; /** * The module's command line arguments. */ static const RTGETOPTDEF g_aBalloonOpts[] = { { "--balloon-dec", GETOPTDEF_BALLOONCTRL_BALLOONDEC, RTGETOPT_REQ_UINT32 }, { "--balloon-groups", GETOPTDEF_BALLOONCTRL_GROUPS, RTGETOPT_REQ_STRING }, { "--balloon-inc", GETOPTDEF_BALLOONCTRL_BALLOONINC, RTGETOPT_REQ_UINT32 }, { "--balloon-interval", GETOPTDEF_BALLOONCTRL_TIMEOUTMS, RTGETOPT_REQ_UINT32 }, { "--balloon-lower-limit", GETOPTDEF_BALLOONCTRL_BALLOONLOWERLIMIT, RTGETOPT_REQ_UINT32 }, { "--balloon-max", GETOPTDEF_BALLOONCTRL_BALLOONMAX, RTGETOPT_REQ_UINT32 }, { "--balloon-safety-margin", GETOPTDEF_BALLOONCTRL_BALLOONSAFETY, RTGETOPT_REQ_UINT32 } }; /** The ballooning module's payload. */ typedef struct VBOXWATCHDOG_BALLOONCTRL_PAYLOAD { /** Last (most recent) ballooning size reported by the guest. */ unsigned long ulBalloonCurLast; /** Last (most recent) ballooning request received. */ unsigned long ulBalloonReqLast; } VBOXWATCHDOG_BALLOONCTRL_PAYLOAD, *PVBOXWATCHDOG_BALLOONCTRL_PAYLOAD; /********************************************************************************************************************************* * Globals * *********************************************************************************************************************************/ static unsigned long g_ulMemoryBalloonTimeoutMS = 30 * 1000; static unsigned long g_ulMemoryBalloonIncrementMB = 256; static unsigned long g_ulMemoryBalloonDecrementMB = 128; /** Command line: Global balloon limit (in MB) for all VMs. Default is 0, which means * no global limit is set. See balloonGetMaxSize() for more information. */ static unsigned long g_ulMemoryBalloonMaxMB = 0; static unsigned long g_ulMemoryBalloonLowerLimitMB = 128; static unsigned long g_ulMemoryBalloonSafetyMB = 1024; /********************************************************************************************************************************* * Local Function Prototypes * *********************************************************************************************************************************/ static int balloonSetSize(PVBOXWATCHDOG_MACHINE pMachine, unsigned long ulBalloonCur); /** * Retrieves the current delta value * * @return long Delta (MB) of the balloon to be deflated (<0) or inflated (>0). * @param pMachine Pointer to the machine's internal structure. * @param ulGuestMemFree The guest's current free memory (MB). * @param ulBalloonOld The balloon's current (old) size (MB). * @param ulBalloonNew The balloon's new size (MB). * @param ulBalloonMax The maximum ballooning size (MB) it can inflate to. */ static long balloonGetDelta(PVBOXWATCHDOG_MACHINE pMachine, unsigned long ulGuestMemFree, unsigned long ulBalloonOld, unsigned long ulBalloonNew, unsigned long ulBalloonMax) { serviceLogVerbose(("[%ls] ulGuestMemFree=%RU32, ulBalloonOld=%RU32, ulBalloonNew=%RU32, ulBalloonMax=%RU32\n", pMachine->strName.raw(), ulGuestMemFree, ulBalloonOld, ulBalloonNew, ulBalloonMax)); /* Make sure that the requested new ballooning size does not * exceed the maximum ballooning size (if set). */ if ( ulBalloonMax && (ulBalloonNew > ulBalloonMax)) { ulBalloonNew = ulBalloonMax; } long lBalloonDelta = 0; if (ulGuestMemFree < g_ulMemoryBalloonLowerLimitMB) { /* Guest is running low on memory, we need to * deflate the balloon. */ lBalloonDelta = (g_ulMemoryBalloonDecrementMB * -1); /* Ensure that the delta will not return a negative * balloon size. */ if ((long)ulBalloonOld + lBalloonDelta < 0) lBalloonDelta = 0; } else if (ulBalloonNew > ulBalloonOld) /* Inflate. */ { /* We want to inflate the balloon if we have room. */ unsigned long ulIncrement = g_ulMemoryBalloonIncrementMB; while (ulIncrement >= 16 && (ulGuestMemFree - ulIncrement) < g_ulMemoryBalloonLowerLimitMB) ulIncrement = (ulIncrement / 2); if ((ulGuestMemFree - ulIncrement) > g_ulMemoryBalloonLowerLimitMB) lBalloonDelta = (long)ulIncrement; /* Make sure we're still within bounds. */ Assert(lBalloonDelta >= 0); if (ulBalloonOld + lBalloonDelta > ulBalloonNew) lBalloonDelta = RT_MIN(g_ulMemoryBalloonIncrementMB, ulBalloonNew - ulBalloonOld); } else if (ulBalloonNew < ulBalloonOld) /* Deflate. */ { lBalloonDelta = RT_MIN(g_ulMemoryBalloonDecrementMB, ulBalloonOld - ulBalloonNew) * -1; } /* Limit the ballooning to the available host memory, leaving some free. * If anything fails clamp the delta to 0. */ if (lBalloonDelta < 0) { uint64_t cbSafety = (uint64_t)g_ulMemoryBalloonSafetyMB * _1M; uint64_t cbHostRamAvail = 0; int vrc = RTSystemQueryAvailableRam(&cbHostRamAvail); if (RT_SUCCESS(vrc)) { if (cbHostRamAvail < cbSafety) lBalloonDelta = 0; else if ((uint64_t)(-lBalloonDelta) > (cbHostRamAvail - cbSafety) / _1M) lBalloonDelta = -(long)((cbHostRamAvail - cbSafety) / _1M); } else lBalloonDelta = 0; } return lBalloonDelta; } /** * Determines the maximum balloon size to set for the specified machine. * * @return unsigned long Maximum ballooning size (in MB), 0 if no maximum set. * @param pMachine Machine to determine maximum ballooning size for. */ static unsigned long balloonGetMaxSize(PVBOXWATCHDOG_MACHINE pMachine) { const ComPtr &rptrMachine = pMachine->machine; /* * Is a maximum ballooning size set? Make sure we're within bounds. * * The maximum balloning size can be set * - via global extra-data ("VBoxInternal/Guest/BalloonSizeMax") * - via command line ("--balloon-max") * * Precedence from top to bottom. */ unsigned long ulBalloonMax = 0; char szSource[64]; Bstr strValue; HRESULT hr = g_pVirtualBox->GetExtraData(Bstr("VBoxInternal/Guest/BalloonSizeMax").raw(), strValue.asOutParam()); if ( SUCCEEDED(hr) && strValue.isNotEmpty()) { ulBalloonMax = Utf8Str(strValue).toUInt32(); if (g_fVerbose) RTStrPrintf(szSource, sizeof(szSource), "global extra-data"); } if (strValue.isEmpty()) { Assert(ulBalloonMax == 0); ulBalloonMax = g_ulMemoryBalloonMaxMB; if (g_fVerbose) RTStrPrintf(szSource, sizeof(szSource), "command line"); } serviceLogVerbose(("[%ls] Maximum balloning size is (%s): %RU32MB\n", pMachine->strName.raw(), szSource, ulBalloonMax)); return ulBalloonMax; } /** * Determines the current (set) balloon size of the specified machine. * * @return IPRT status code. * @param pMachine Machine to determine maximum ballooning size for. * @param pulBalloonCur Where to store the current (set) balloon size (in MB) on success. */ static int balloonGetCurrentSize(PVBOXWATCHDOG_MACHINE pMachine, unsigned long *pulBalloonCur) { LONG lBalloonCur; int vrc = getMetric(pMachine, L"Guest/RAM/Usage/Balloon", &lBalloonCur); if (RT_SUCCESS(vrc)) { lBalloonCur /= 1024; /* Convert to MB. */ if (pulBalloonCur) *pulBalloonCur = (unsigned long)lBalloonCur; } return vrc; } /** * Determines the requested balloon size to set for the specified machine. * * @return unsigned long Requested ballooning size (in MB), 0 if ballooning should be disabled. * @param pMachine Machine to determine maximum ballooning size for. */ static unsigned long balloonGetRequestedSize(PVBOXWATCHDOG_MACHINE pMachine) { const ComPtr &rptrMachine = pMachine->machine; /* * The maximum balloning size can be set * - via per-VM extra-data ("VBoxInternal2/Watchdog/BalloonCtrl/BalloonSizeMax") * - via per-VM extra-data (legacy) ("VBoxInternal/Guest/BalloonSizeMax") * * Precedence from top to bottom. */ unsigned long ulBalloonReq = 0; char szSource[64]; Bstr strValue; HRESULT hr = rptrMachine->GetExtraData(Bstr("VBoxInternal2/Watchdog/BalloonCtrl/BalloonSizeMax").raw(), strValue.asOutParam()); if ( SUCCEEDED(hr) && strValue.isNotEmpty()) { ulBalloonReq = Utf8Str(strValue).toUInt32(); if (g_fVerbose) RTStrPrintf(szSource, sizeof(szSource), "per-VM extra-data"); } else { hr = rptrMachine->GetExtraData(Bstr("VBoxInternal/Guest/BalloonSizeMax").raw(), strValue.asOutParam()); if ( SUCCEEDED(hr) && strValue.isNotEmpty()) { ulBalloonReq = Utf8Str(strValue).toUInt32(); if (g_fVerbose) RTStrPrintf(szSource, sizeof(szSource), "per-VM extra-data (legacy)"); } } if ( FAILED(hr) || strValue.isEmpty()) { ulBalloonReq = 0; if (g_fVerbose) RTStrPrintf(szSource, sizeof(szSource), "none (disabled)"); } serviceLogVerbose(("[%ls] Requested balloning size is (%s): %RU32MB\n", pMachine->strName.raw(), szSource, ulBalloonReq)); return ulBalloonReq; } /** * Determines whether ballooning for the specified machine is enabled or not. * This can be specified on a per-VM basis or as a globally set value for all VMs. * * @return bool Whether ballooning is enabled or not. * @param pMachine Machine to determine enable status for. */ static bool balloonIsEnabled(PVBOXWATCHDOG_MACHINE pMachine) { const ComPtr &rptrMachine = pMachine->machine; bool fEnabled = true; /* By default ballooning is enabled. */ char szSource[64]; Bstr strValue; HRESULT hr = g_pVirtualBox->GetExtraData(Bstr("VBoxInternal/Guest/BalloonEnabled").raw(), strValue.asOutParam()); if ( SUCCEEDED(hr) && strValue.isNotEmpty()) { if (g_fVerbose) RTStrPrintf(szSource, sizeof(szSource), "global extra-data"); } else { hr = rptrMachine->GetExtraData(Bstr("VBoxInternal2/Watchdog/BalloonCtrl/BalloonEnabled").raw(), strValue.asOutParam()); if (SUCCEEDED(hr)) { if (g_fVerbose) RTStrPrintf(szSource, sizeof(szSource), "per-VM extra-data"); } } if (strValue.isNotEmpty()) { fEnabled = RT_BOOL(Utf8Str(strValue).toUInt32()); serviceLogVerbose(("[%ls] Ballooning is forced to %s (%s)\n", pMachine->strName.raw(), fEnabled ? "enabled" : "disabled", szSource)); } return fEnabled; } /** * Indicates whether ballooning on the specified machine state is * possible -- this only is true if the machine is up and running. * * @return bool Flag indicating whether the VM is running or not. * @param enmState The VM's machine state to judge whether it's running or not. */ static bool balloonIsPossible(MachineState_T enmState) { switch (enmState) { case MachineState_Running: #if 0 /* Not required for ballooning. */ case MachineState_Teleporting: case MachineState_LiveSnapshotting: case MachineState_Paused: case MachineState_TeleportingPausedVM: #endif return true; default: break; } return false; } int balloonMachineSetup(const Bstr& strUuid) { int vrc = VINF_SUCCESS; do { PVBOXWATCHDOG_MACHINE pMachine = getMachine(strUuid); AssertPtrBreakStmt(pMachine, vrc=VERR_INVALID_PARAMETER); ComPtr m = pMachine->machine; /* * Setup metrics required for ballooning. */ com::SafeArray metricNames(1); com::SafeIfaceArray metricObjects(1); com::SafeIfaceArray metricAffected; Bstr strMetricNames(L"Guest/RAM/Usage"); strMetricNames.cloneTo(&metricNames[0]); HRESULT rc = m.queryInterfaceTo(&metricObjects[0]); #ifdef VBOX_WATCHDOG_GLOBAL_PERFCOL CHECK_ERROR_BREAK(g_pPerfCollector, SetupMetrics(ComSafeArrayAsInParam(metricNames), ComSafeArrayAsInParam(metricObjects), 5 /* 5 seconds */, 1 /* One sample is enough */, ComSafeArrayAsOutParam(metricAffected))); #else ComPtr coll = pMachine->collector; CHECK_ERROR_BREAK(g_pVirtualBox, COMGETTER(PerformanceCollector)(coll.asOutParam())); CHECK_ERROR_BREAK(coll, SetupMetrics(ComSafeArrayAsInParam(metricNames), ComSafeArrayAsInParam(metricObjects), 5 /* 5 seconds */, 1 /* One sample is enough */, ComSafeArrayAsOutParam(metricAffected))); #endif if (FAILED(rc)) vrc = VERR_COM_IPRT_ERROR; /* @todo Find better rc! */ } while (0); return vrc; } /** * Does the actual ballooning and assumes the machine is * capable and ready for ballooning. * * @return IPRT status code. * @param pMachine Pointer to the machine's internal structure. */ static int balloonMachineUpdate(PVBOXWATCHDOG_MACHINE pMachine) { AssertPtrReturn(pMachine, VERR_INVALID_POINTER); /* * Get metrics collected at this point. */ LONG lGuestMemFree; unsigned long ulBalloonCur; int vrc = getMetric(pMachine, L"Guest/RAM/Usage/Free", &lGuestMemFree); if (RT_SUCCESS(vrc)) vrc = balloonGetCurrentSize(pMachine, &ulBalloonCur); if (RT_SUCCESS(vrc)) { /* If guest statistics are not up and running yet, skip this iteration and try next time. */ if (lGuestMemFree <= 0) { #ifdef DEBUG serviceLogVerbose(("[%ls] No metrics available yet!\n", pMachine->strName.raw())); #endif return VINF_SUCCESS; } lGuestMemFree /= 1024; PVBOXWATCHDOG_BALLOONCTRL_PAYLOAD pData = (PVBOXWATCHDOG_BALLOONCTRL_PAYLOAD) payloadFrom(pMachine, VBOX_MOD_BALLOONING_NAME); AssertPtr(pData); /* Determine if ballooning is enabled or disabled. */ bool fEnabled = balloonIsEnabled(pMachine); /* Determine the current set maximum balloon size. */ unsigned long ulBalloonMax = balloonGetMaxSize(pMachine); /* Determine the requested balloon size. */ unsigned long ulBalloonReq = balloonGetRequestedSize(pMachine); serviceLogVerbose(("[%ls] Free RAM (MB): %RI32, Ballooning: Current=%RU32MB, Requested=%RU32MB, Maximum=%RU32MB\n", pMachine->strName.raw(), lGuestMemFree, ulBalloonCur, ulBalloonReq, ulBalloonMax)); if ( ulBalloonMax && (ulBalloonReq > ulBalloonMax)) { if (pData->ulBalloonReqLast != ulBalloonReq) serviceLog("[%ls] Warning: Requested ballooning size (%RU32MB) exceeds set maximum ballooning size (%RU32MB), limiting ...\n", pMachine->strName.raw(), ulBalloonReq, ulBalloonMax); } /* Calculate current balloon delta. */ long lBalloonDelta = balloonGetDelta(pMachine, (unsigned long)lGuestMemFree, ulBalloonCur, ulBalloonReq, ulBalloonMax); #ifdef DEBUG serviceLogVerbose(("[%ls] lBalloonDelta=%RI32\n", pMachine->strName.raw(), lBalloonDelta)); #endif if (lBalloonDelta) /* Only do ballooning if there's really smth. to change ... */ { ulBalloonCur = ulBalloonCur + lBalloonDelta; if (fEnabled) { serviceLog("[%ls] %s balloon by %RU32MB to %RU32MB ...\n", pMachine->strName.raw(), lBalloonDelta > 0 ? "Inflating" : "Deflating", RT_ABS(lBalloonDelta), ulBalloonCur); vrc = balloonSetSize(pMachine, ulBalloonCur); } else serviceLogVerbose(("[%ls] Requested %s balloon by %RU32MB to %RU32MB, but ballooning is disabled\n", pMachine->strName.raw(), lBalloonDelta > 0 ? "inflating" : "deflating", RT_ABS(lBalloonDelta), ulBalloonCur)); } if (ulBalloonCur != pData->ulBalloonCurLast) { /* If ballooning is disabled, always bolt down the ballooning size to 0. */ if (!fEnabled) { serviceLogVerbose(("[%ls] Ballooning is disabled, forcing to 0\n", pMachine->strName.raw())); int vrc2 = balloonSetSize(pMachine, 0); if (RT_FAILURE(vrc2)) serviceLog("[%ls] Error disabling ballooning, rc=%Rrc\n", pMachine->strName.raw(), vrc2); } } pData->ulBalloonCurLast = ulBalloonCur; pData->ulBalloonReqLast = ulBalloonReq; } else serviceLog("[%ls] Error retrieving metrics, rc=%Rrc\n", pMachine->strName.raw(), vrc); return vrc; } static int balloonSetSize(PVBOXWATCHDOG_MACHINE pMachine, unsigned long ulBalloonCur) { int vrc = VINF_SUCCESS; serviceLogVerbose(("[%ls] Setting balloon size to %RU32MB ...\n", pMachine->strName.raw(), ulBalloonCur)); if (g_fDryrun) return VINF_SUCCESS; /* Open a session for the VM. */ HRESULT rc; CHECK_ERROR_RET(pMachine->machine, LockMachine(g_pSession, LockType_Shared), VERR_ACCESS_DENIED); do { /* Get the associated console. */ ComPtr console; CHECK_ERROR_BREAK(g_pSession, COMGETTER(Console)(console.asOutParam())); ComPtr guest; rc = console->COMGETTER(Guest)(guest.asOutParam()); if (SUCCEEDED(rc)) CHECK_ERROR_BREAK(guest, COMSETTER(MemoryBalloonSize)((LONG)ulBalloonCur)); else serviceLog("Error: Unable to set new balloon size %RU32 for machine '%ls', rc=%Rhrc\n", ulBalloonCur, pMachine->strName.raw(), rc); if (FAILED(rc)) vrc = VERR_COM_IPRT_ERROR; } while (0); /* Unlock the machine again. */ CHECK_ERROR_RET(g_pSession, UnlockMachine(), VERR_ACCESS_DENIED); return vrc; } /* Callbacks. */ static DECLCALLBACK(int) VBoxModBallooningPreInit(void) { return VINF_SUCCESS; } static DECLCALLBACK(int) VBoxModBallooningOption(int argc, char *argv[], int *piConsumed) { if (!argc) /* Take a shortcut. */ return -1; AssertPtrReturn(argv, VERR_INVALID_POINTER); AssertPtrReturn(piConsumed, VERR_INVALID_POINTER); RTGETOPTSTATE GetState; int rc = RTGetOptInit(&GetState, argc, argv, g_aBalloonOpts, RT_ELEMENTS(g_aBalloonOpts), 0 /* First */, 0 /*fFlags*/); if (RT_FAILURE(rc)) return rc; rc = 0; /* Set default parsing result to valid. */ int c; RTGETOPTUNION ValueUnion; while ((c = RTGetOpt(&GetState, &ValueUnion))) { switch (c) { case GETOPTDEF_BALLOONCTRL_BALLOONDEC: g_ulMemoryBalloonDecrementMB = ValueUnion.u32; break; case GETOPTDEF_BALLOONCTRL_BALLOONINC: g_ulMemoryBalloonIncrementMB = ValueUnion.u32; break; case GETOPTDEF_BALLOONCTRL_GROUPS: /** @todo Add ballooning groups cmd line arg. */ break; case GETOPTDEF_BALLOONCTRL_BALLOONLOWERLIMIT: g_ulMemoryBalloonLowerLimitMB = ValueUnion.u32; break; case GETOPTDEF_BALLOONCTRL_BALLOONMAX: g_ulMemoryBalloonMaxMB = ValueUnion.u32; break; case GETOPTDEF_BALLOONCTRL_BALLOONSAFETY: g_ulMemoryBalloonSafetyMB = ValueUnion.u32; break; /** @todo This option is a common module option! Put * this into a utility function! */ case GETOPTDEF_BALLOONCTRL_TIMEOUTMS: g_ulMemoryBalloonTimeoutMS = ValueUnion.u32; if (g_ulMemoryBalloonTimeoutMS < 500) g_ulMemoryBalloonTimeoutMS = 500; break; default: rc = -1; /* We don't handle this option, skip. */ break; } /* At the moment we only process one option at a time. */ break; } *piConsumed += GetState.iNext - 1; return rc; } static DECLCALLBACK(int) VBoxModBallooningInit(void) { if (!g_ulMemoryBalloonTimeoutMS) cfgGetValueULong(g_pVirtualBox, NULL /* Machine */, "VBoxInternal2/Watchdog/BalloonCtrl/TimeoutMS", NULL /* Per-machine */, &g_ulMemoryBalloonTimeoutMS, 30 * 1000 /* Default is 30 seconds timeout. */); if (!g_ulMemoryBalloonIncrementMB) cfgGetValueULong(g_pVirtualBox, NULL /* Machine */, "VBoxInternal2/Watchdog/BalloonCtrl/BalloonIncrementMB", NULL /* Per-machine */, &g_ulMemoryBalloonIncrementMB, 256); if (!g_ulMemoryBalloonDecrementMB) cfgGetValueULong(g_pVirtualBox, NULL /* Machine */, "VBoxInternal2/Watchdog/BalloonCtrl/BalloonDecrementMB", NULL /* Per-machine */, &g_ulMemoryBalloonDecrementMB, 128); if (!g_ulMemoryBalloonLowerLimitMB) cfgGetValueULong(g_pVirtualBox, NULL /* Machine */, "VBoxInternal2/Watchdog/BalloonCtrl/BalloonLowerLimitMB", NULL /* Per-machine */, &g_ulMemoryBalloonLowerLimitMB, 128); return VINF_SUCCESS; } static DECLCALLBACK(int) VBoxModBallooningMain(void) { static uint64_t s_msLast = RTTimeMilliTS(); uint64_t msDelta = RTTimeMilliTS() - s_msLast; if (msDelta <= g_ulMemoryBalloonTimeoutMS) return VINF_SUCCESS; int rc = VINF_SUCCESS; /** @todo Provide API for enumerating/working w/ machines inside a module! */ mapVMIter it = g_mapVM.begin(); while (it != g_mapVM.end()) { MachineState_T state = getMachineState(&it->second); /* Our actual ballooning criteria. */ if (balloonIsPossible(state)) { rc = balloonMachineUpdate(&it->second); AssertRC(rc); } if (RT_FAILURE(rc)) break; ++it; } s_msLast = RTTimeMilliTS(); return rc; } static DECLCALLBACK(int) VBoxModBallooningStop(void) { return VINF_SUCCESS; } static DECLCALLBACK(void) VBoxModBallooningTerm(void) { } static DECLCALLBACK(int) VBoxModBallooningOnMachineRegistered(const Bstr &strUuid) { PVBOXWATCHDOG_MACHINE pMachine = getMachine(strUuid); AssertPtrReturn(pMachine, VERR_INVALID_PARAMETER); PVBOXWATCHDOG_BALLOONCTRL_PAYLOAD pData; int rc = payloadAlloc(pMachine, VBOX_MOD_BALLOONING_NAME, sizeof(VBOXWATCHDOG_BALLOONCTRL_PAYLOAD), (void**)&pData); if (RT_SUCCESS(rc)) rc = balloonMachineUpdate(pMachine); return rc; } static DECLCALLBACK(int) VBoxModBallooningOnMachineUnregistered(const Bstr &strUuid) { PVBOXWATCHDOG_MACHINE pMachine = getMachine(strUuid); AssertPtrReturn(pMachine, VERR_INVALID_PARAMETER); payloadFree(pMachine, VBOX_MOD_BALLOONING_NAME); return VINF_SUCCESS; } static DECLCALLBACK(int) VBoxModBallooningOnMachineStateChanged(const Bstr &strUuid, MachineState_T enmState) { PVBOXWATCHDOG_MACHINE pMachine = getMachine(strUuid); /* Note: The machine state will change to "setting up" when machine gets deleted, * so pMachine might be NULL here. */ if (!pMachine) return VINF_SUCCESS; return balloonMachineUpdate(pMachine); } static DECLCALLBACK(int) VBoxModBallooningOnServiceStateChanged(bool fAvailable) { return VINF_SUCCESS; } /** * The 'balloonctrl' module description. */ VBOXMODULE g_ModBallooning = { /* pszName. */ VBOX_MOD_BALLOONING_NAME, /* pszDescription. */ "Memory Ballooning Control", /* pszDepends. */ NULL, /* uPriority. */ 0 /* Not used */, /* pszUsage. */ " [--balloon-dec=] [--balloon-groups=] [--balloon-inc=]\n" " [--balloon-interval=] [--balloon-lower-limit=]\n" " [--balloon-max=]\n", /* pszOptions. */ "--balloon-dec Sets the ballooning decrement in MB (128 MB).\n" "--balloon-groups Sets the VM groups for ballooning (all).\n" "--balloon-inc Sets the ballooning increment in MB (256 MB).\n" "--balloon-interval Sets the check interval in ms (30 seconds).\n" "--balloon-lower-limit Sets the ballooning lower limit in MB (64 MB).\n" "--balloon-max Sets the balloon maximum limit in MB (0 MB).\n" " Specifying \"0\" means disabled ballooning.\n" #if 1 /* (Legacy) note. */ "Set \"VBoxInternal/Guest/BalloonSizeMax\" for a per-VM maximum ballooning size.\n" #endif "--balloon-safety-margin Free memory when deflating a balloon in MB (1024 MB).\n" , /* methods. */ VBoxModBallooningPreInit, VBoxModBallooningOption, VBoxModBallooningInit, VBoxModBallooningMain, VBoxModBallooningStop, VBoxModBallooningTerm, /* callbacks. */ VBoxModBallooningOnMachineRegistered, VBoxModBallooningOnMachineUnregistered, VBoxModBallooningOnMachineStateChanged, VBoxModBallooningOnServiceStateChanged };