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|
/* $Id: VBoxModAPIMonitor.cpp $ */
/** @file
* VBoxModAPIMonitor - API monitor module for detecting host isolation.
*/
/*
* Copyright (C) 2012-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#ifndef VBOX_ONLY_DOCS
# include <iprt/message.h>
# include <VBox/com/errorprint.h>
#endif /* !VBOX_ONLY_DOCS */
#include "VBoxWatchdogInternal.h"
using namespace com;
#define VBOX_MOD_APIMON_NAME "apimon"
/**
* The module's RTGetOpt-IDs for the command line.
*/
enum GETOPTDEF_APIMON
{
GETOPTDEF_APIMON_GROUPS = 3000,
GETOPTDEF_APIMON_ISLN_RESPONSE,
GETOPTDEF_APIMON_ISLN_TIMEOUT,
GETOPTDEF_APIMON_RESP_TIMEOUT
};
/**
* The module's command line arguments.
*/
static const RTGETOPTDEF g_aAPIMonitorOpts[] = {
{ "--apimon-groups", GETOPTDEF_APIMON_GROUPS, RTGETOPT_REQ_STRING },
{ "--apimon-isln-response", GETOPTDEF_APIMON_ISLN_RESPONSE, RTGETOPT_REQ_STRING },
{ "--apimon-isln-timeout", GETOPTDEF_APIMON_ISLN_TIMEOUT, RTGETOPT_REQ_UINT32 },
{ "--apimon-resp-timeout", GETOPTDEF_APIMON_RESP_TIMEOUT, RTGETOPT_REQ_UINT32 }
};
enum APIMON_RESPONSE
{
/** Unknown / unhandled response. */
APIMON_RESPONSE_NONE = 0,
/** Pauses the VM execution. */
APIMON_RESPONSE_PAUSE = 10,
/** Does a hard power off. */
APIMON_RESPONSE_POWEROFF = 200,
/** Tries to save the current machine state. */
APIMON_RESPONSE_SAVE = 250,
/** Tries to shut down all running VMs in
* a gentle manner. */
APIMON_RESPONSE_SHUTDOWN = 300
};
/** The VM group(s) the API monitor handles. If none, all VMs get handled. */
static mapGroups g_vecAPIMonGroups; /** @todo Move this into module payload! */
static APIMON_RESPONSE g_enmAPIMonIslnResp = APIMON_RESPONSE_NONE;
static uint32_t g_cMsAPIMonIslnTimeout = 0;
static Bstr g_strAPIMonIslnLastBeat;
static uint32_t g_cMsAPIMonResponseTimeout = 0;
static uint64_t g_uAPIMonIslnLastBeatMS = 0;
static int apimonResponseToEnum(const char *pszResponse, APIMON_RESPONSE *pResp)
{
AssertPtrReturn(pszResponse, VERR_INVALID_POINTER);
AssertPtrReturn(pResp, VERR_INVALID_POINTER);
int rc = VINF_SUCCESS;
if (!RTStrICmp(pszResponse, "none"))
{
*pResp = APIMON_RESPONSE_NONE;
}
else if (!RTStrICmp(pszResponse, "pause"))
{
*pResp = APIMON_RESPONSE_PAUSE;
}
else if ( !RTStrICmp(pszResponse, "poweroff")
|| !RTStrICmp(pszResponse, "powerdown"))
{
*pResp = APIMON_RESPONSE_POWEROFF;
}
else if (!RTStrICmp(pszResponse, "save"))
{
*pResp = APIMON_RESPONSE_SAVE;
}
else if ( !RTStrICmp(pszResponse, "shutdown")
|| !RTStrICmp(pszResponse, "shutoff"))
{
*pResp = APIMON_RESPONSE_SHUTDOWN;
}
else
{
*pResp = APIMON_RESPONSE_NONE;
rc = VERR_INVALID_PARAMETER;
}
return rc;
}
static const char* apimonResponseToStr(APIMON_RESPONSE enmResp)
{
if (APIMON_RESPONSE_NONE == enmResp)
return "none";
else if (APIMON_RESPONSE_PAUSE == enmResp)
return "pausing";
else if (APIMON_RESPONSE_POWEROFF == enmResp)
return "powering off";
else if (APIMON_RESPONSE_SAVE == enmResp)
return "saving state";
else if (APIMON_RESPONSE_SHUTDOWN == enmResp)
return "shutting down";
return "unknown";
}
/* Copied from VBoxManageInfo.cpp. */
static const char *apimonMachineStateToName(MachineState_T machineState, bool fShort)
{
switch (machineState)
{
case MachineState_PoweredOff:
return fShort ? "poweroff" : "powered off";
case MachineState_Saved:
return "saved";
case MachineState_Teleported:
return "teleported";
case MachineState_Aborted:
return "aborted";
case MachineState_AbortedSaved:
return "aborted-saved";
case MachineState_Running:
return "running";
case MachineState_Paused:
return "paused";
case MachineState_Stuck:
return fShort ? "gurumeditation" : "guru meditation";
case MachineState_LiveSnapshotting:
return fShort ? "livesnapshotting" : "live snapshotting";
case MachineState_Teleporting:
return "teleporting";
case MachineState_Starting:
return "starting";
case MachineState_Stopping:
return "stopping";
case MachineState_Saving:
return "saving";
case MachineState_Restoring:
return "restoring";
case MachineState_TeleportingPausedVM:
return fShort ? "teleportingpausedvm" : "teleporting paused vm";
case MachineState_TeleportingIn:
return fShort ? "teleportingin" : "teleporting (incoming)";
case MachineState_RestoringSnapshot:
return fShort ? "restoringsnapshot" : "restoring snapshot";
case MachineState_DeletingSnapshot:
return fShort ? "deletingsnapshot" : "deleting snapshot";
case MachineState_DeletingSnapshotOnline:
return fShort ? "deletingsnapshotlive" : "deleting snapshot live";
case MachineState_DeletingSnapshotPaused:
return fShort ? "deletingsnapshotlivepaused" : "deleting snapshot live paused";
case MachineState_SettingUp:
return fShort ? "settingup" : "setting up";
default:
break;
}
return "unknown";
}
static int apimonMachineControl(const Bstr &strUuid, PVBOXWATCHDOG_MACHINE pMachine,
APIMON_RESPONSE enmResp, uint32_t cMsTimeout)
{
/** @todo Add other commands (with enmResp) here. */
AssertPtrReturn(pMachine, VERR_INVALID_POINTER);
serviceLogVerbose(("apimon: Triggering \"%s\" (%RU32ms timeout) for machine \"%ls\"\n",
apimonResponseToStr(enmResp), cMsTimeout, strUuid.raw()));
if ( enmResp == APIMON_RESPONSE_NONE
|| g_fDryrun)
return VINF_SUCCESS; /* Nothing to do. */
HRESULT hrc;
ComPtr <IMachine> machine;
CHECK_ERROR_RET(g_pVirtualBox, FindMachine(strUuid.raw(),
machine.asOutParam()), VERR_NOT_FOUND);
do
{
/* Query the machine's state to avoid unnecessary IPC. */
MachineState_T machineState;
CHECK_ERROR_BREAK(machine, COMGETTER(State)(&machineState));
if ( machineState == MachineState_Running
|| machineState == MachineState_Paused)
{
/* Open a session for the VM. */
CHECK_ERROR_BREAK(machine, LockMachine(g_pSession, LockType_Shared));
do
{
/* Get the associated console. */
ComPtr<IConsole> console;
CHECK_ERROR_BREAK(g_pSession, COMGETTER(Console)(console.asOutParam()));
/* Get the associated session machine. */
ComPtr<IMachine> sessionMachine;
CHECK_ERROR_BREAK(g_pSession, COMGETTER(Machine)(sessionMachine.asOutParam()));
ComPtr<IProgress> progress;
switch (enmResp)
{
case APIMON_RESPONSE_PAUSE:
if (machineState != MachineState_Paused)
{
serviceLogVerbose(("apimon: Pausing machine \"%ls\" ...\n",
strUuid.raw()));
CHECK_ERROR_BREAK(console, Pause());
}
break;
case APIMON_RESPONSE_POWEROFF:
serviceLogVerbose(("apimon: Powering off machine \"%ls\" ...\n",
strUuid.raw()));
CHECK_ERROR_BREAK(console, PowerDown(progress.asOutParam()));
progress->WaitForCompletion(cMsTimeout);
CHECK_PROGRESS_ERROR(progress, ("Failed to power off machine \"%ls\"",
strUuid.raw()));
break;
case APIMON_RESPONSE_SAVE:
{
serviceLogVerbose(("apimon: Saving state of machine \"%ls\" ...\n",
strUuid.raw()));
/* First pause so we don't trigger a live save which needs more time/resources. */
bool fPaused = false;
hrc = console->Pause();
if (FAILED(hrc))
{
bool fError = true;
if (hrc == VBOX_E_INVALID_VM_STATE)
{
/* Check if we are already paused. */
CHECK_ERROR_BREAK(console, COMGETTER(State)(&machineState));
/* The error code was lost by the previous instruction. */
hrc = VBOX_E_INVALID_VM_STATE;
if (machineState != MachineState_Paused)
{
serviceLog("apimon: Machine \"%ls\" in invalid state %d -- %s\n",
strUuid.raw(), machineState, apimonMachineStateToName(machineState, false));
}
else
{
fError = false;
fPaused = true;
}
}
if (fError)
break;
}
CHECK_ERROR(sessionMachine, SaveState(progress.asOutParam()));
if (SUCCEEDED(hrc))
{
progress->WaitForCompletion(cMsTimeout);
CHECK_PROGRESS_ERROR(progress, ("Failed to save machine state of machine \"%ls\"",
strUuid.raw()));
}
if (SUCCEEDED(hrc))
{
serviceLogVerbose(("apimon: State of machine \"%ls\" saved, powering off ...\n", strUuid.raw()));
CHECK_ERROR_BREAK(console, PowerButton());
}
else
serviceLogVerbose(("apimon: Saving state of machine \"%ls\" failed\n", strUuid.raw()));
break;
}
case APIMON_RESPONSE_SHUTDOWN:
serviceLogVerbose(("apimon: Shutting down machine \"%ls\" ...\n", strUuid.raw()));
CHECK_ERROR_BREAK(console, PowerButton());
break;
default:
AssertMsgFailed(("Response %d not implemented", enmResp));
break;
}
} while (0);
/* Unlock the machine again. */
g_pSession->UnlockMachine();
}
else
serviceLogVerbose(("apimon: Warning: Could not trigger \"%s\" (%d) for machine \"%ls\"; in state \"%s\" (%d) currently\n",
apimonResponseToStr(enmResp), enmResp, strUuid.raw(),
apimonMachineStateToName(machineState, false), machineState));
} while (0);
return SUCCEEDED(hrc) ? VINF_SUCCESS : VERR_COM_IPRT_ERROR;
}
static bool apimonHandleVM(const PVBOXWATCHDOG_MACHINE pMachine)
{
bool fHandleVM = false;
try
{
mapGroupsIterConst itVMGroup = pMachine->groups.begin();
while ( itVMGroup != pMachine->groups.end()
&& !fHandleVM)
{
mapGroupsIterConst itInGroup = g_vecAPIMonGroups.find(itVMGroup->first);
if (itInGroup != g_vecAPIMonGroups.end())
fHandleVM = true;
++itVMGroup;
}
}
catch (...)
{
AssertFailed();
}
return fHandleVM;
}
static int apimonTrigger(APIMON_RESPONSE enmResp)
{
int rc = VINF_SUCCESS;
bool fAllGroups = g_vecAPIMonGroups.empty();
mapVMIter it = g_mapVM.begin();
if (it == g_mapVM.end())
{
serviceLog("apimon: No machines in list, skipping ...\n");
return rc;
}
while (it != g_mapVM.end())
{
bool fHandleVM = fAllGroups;
try
{
if (!fHandleVM)
fHandleVM = apimonHandleVM(&it->second);
if (fHandleVM)
{
int rc2 = apimonMachineControl(it->first /* Uuid */,
&it->second /* Machine */, enmResp, g_cMsAPIMonResponseTimeout);
if (RT_FAILURE(rc2))
serviceLog("apimon: Controlling machine \"%ls\" (response \"%s\") failed with rc=%Rrc",
it->first.raw(), apimonResponseToStr(enmResp), rc);
if (RT_SUCCESS(rc))
rc = rc2; /* Store original error. */
/* Keep going. */
}
}
catch (...)
{
AssertFailed();
}
++it;
}
return rc;
}
/* Callbacks. */
static DECLCALLBACK(int) VBoxModAPIMonitorPreInit(void)
{
return VINF_SUCCESS;
}
static DECLCALLBACK(int) VBoxModAPIMonitorOption(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_aAPIMonitorOpts, RT_ELEMENTS(g_aAPIMonitorOpts),
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_APIMON_GROUPS:
{
rc = groupAdd(g_vecAPIMonGroups, ValueUnion.psz, 0 /* Flags */);
if (RT_FAILURE(rc))
rc = -1; /* Option unknown. */
break;
}
case GETOPTDEF_APIMON_ISLN_RESPONSE:
rc = apimonResponseToEnum(ValueUnion.psz, &g_enmAPIMonIslnResp);
if (RT_FAILURE(rc))
rc = -1; /* Option unknown. */
break;
case GETOPTDEF_APIMON_ISLN_TIMEOUT:
g_cMsAPIMonIslnTimeout = ValueUnion.u32;
if (g_cMsAPIMonIslnTimeout < 1000) /* Don't allow timeouts < 1s. */
g_cMsAPIMonIslnTimeout = 1000;
break;
case GETOPTDEF_APIMON_RESP_TIMEOUT:
g_cMsAPIMonResponseTimeout = ValueUnion.u32;
if (g_cMsAPIMonResponseTimeout < 5000) /* Don't allow timeouts < 5s. */
g_cMsAPIMonResponseTimeout = 5000;
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) VBoxModAPIMonitorInit(void)
{
HRESULT hrc = S_OK;
do
{
Bstr strValue;
/* VM groups to watch for. */
if (g_vecAPIMonGroups.empty()) /* Not set by command line? */
{
CHECK_ERROR_BREAK(g_pVirtualBox, GetExtraData(Bstr("VBoxInternal2/Watchdog/APIMonitor/Groups").raw(),
strValue.asOutParam()));
if (!strValue.isEmpty())
{
int rc2 = groupAdd(g_vecAPIMonGroups, Utf8Str(strValue).c_str(), 0 /* Flags */);
if (RT_FAILURE(rc2))
serviceLog("apimon: Warning: API monitor groups string invalid (%ls)\n", strValue.raw());
}
}
if (!g_cMsAPIMonIslnTimeout)
cfgGetValueU32(g_pVirtualBox, NULL /* Machine */,
"VBoxInternal2/Watchdog/APIMonitor/IsolationTimeoutMS", NULL /* Per-machine */,
&g_cMsAPIMonIslnTimeout, 30 * 1000 /* Default is 30 seconds timeout. */);
g_cMsAPIMonIslnTimeout = RT_MIN(1000, g_cMsAPIMonIslnTimeout);
if (g_enmAPIMonIslnResp == APIMON_RESPONSE_NONE) /* Not set by command line? */
{
Utf8Str strResp;
int rc2 = cfgGetValueStr(g_pVirtualBox, NULL /* Machine */,
"VBoxInternal2/Watchdog/APIMonitor/IsolationResponse", NULL /* Per-machine */,
strResp, "" /* Default value. */);
if (RT_SUCCESS(rc2))
{
rc2 = apimonResponseToEnum(strResp.c_str(), &g_enmAPIMonIslnResp);
if (RT_FAILURE(rc2))
serviceLog("apimon: Warning: API monitor response string invalid (%ls), defaulting to no action\n",
strValue.raw());
}
}
if (!g_cMsAPIMonResponseTimeout)
cfgGetValueU32(g_pVirtualBox, NULL /* Machine */,
"VBoxInternal2/Watchdog/APIMonitor/ResponseTimeoutMS", NULL /* Per-machine */,
&g_cMsAPIMonResponseTimeout, 30 * 1000 /* Default is 30 seconds timeout. */);
g_cMsAPIMonResponseTimeout = RT_MIN(5000, g_cMsAPIMonResponseTimeout);
#ifdef DEBUG
/* Groups. */
serviceLogVerbose(("apimon: Handling %u groups:", g_vecAPIMonGroups.size()));
mapGroupsIterConst itGroups = g_vecAPIMonGroups.begin();
while (itGroups != g_vecAPIMonGroups.end())
{
serviceLogVerbose((" %s", itGroups->first.c_str()));
++itGroups;
}
serviceLogVerbose(("\n"));
#endif
} while (0);
if (SUCCEEDED(hrc))
{
g_uAPIMonIslnLastBeatMS = 0;
}
return SUCCEEDED(hrc) ? VINF_SUCCESS : VERR_COM_IPRT_ERROR; /** @todo Find a better rc! */
}
static DECLCALLBACK(int) VBoxModAPIMonitorMain(void)
{
static uint64_t uLastRun = 0;
uint64_t uNow = RTTimeProgramMilliTS();
uint64_t uDelta = uNow - uLastRun;
if (uDelta < 1000) /* Only check every second (or later). */
return VINF_SUCCESS;
uLastRun = uNow;
int vrc = VINF_SUCCESS;
HRESULT hrc;
#ifdef DEBUG
serviceLogVerbose(("apimon: Checking for API heartbeat (%RU64ms) ...\n",
g_cMsAPIMonIslnTimeout));
#endif
do
{
Bstr strHeartbeat;
CHECK_ERROR_BREAK(g_pVirtualBox, GetExtraData(Bstr("Watchdog/APIMonitor/Heartbeat").raw(),
strHeartbeat.asOutParam()));
if ( SUCCEEDED(hrc)
&& !strHeartbeat.isEmpty()
&& g_strAPIMonIslnLastBeat.compare(strHeartbeat, Bstr::CaseSensitive))
{
serviceLogVerbose(("apimon: API heartbeat received, resetting timeout\n"));
g_uAPIMonIslnLastBeatMS = 0;
g_strAPIMonIslnLastBeat = strHeartbeat;
}
else
{
g_uAPIMonIslnLastBeatMS += uDelta;
if (g_uAPIMonIslnLastBeatMS > g_cMsAPIMonIslnTimeout)
{
serviceLogVerbose(("apimon: No API heartbeat within time received (%RU64ms)\n",
g_cMsAPIMonIslnTimeout));
vrc = apimonTrigger(g_enmAPIMonIslnResp);
g_uAPIMonIslnLastBeatMS = 0;
}
}
} while (0);
if (FAILED(hrc))
vrc = VERR_COM_IPRT_ERROR;
return vrc;
}
static DECLCALLBACK(int) VBoxModAPIMonitorStop(void)
{
return VINF_SUCCESS;
}
static DECLCALLBACK(void) VBoxModAPIMonitorTerm(void)
{
}
static DECLCALLBACK(int) VBoxModAPIMonitorOnMachineRegistered(const Bstr &strUuid)
{
RT_NOREF(strUuid);
return VINF_SUCCESS;
}
static DECLCALLBACK(int) VBoxModAPIMonitorOnMachineUnregistered(const Bstr &strUuid)
{
RT_NOREF(strUuid);
return VINF_SUCCESS;
}
static DECLCALLBACK(int) VBoxModAPIMonitorOnMachineStateChanged(const Bstr &strUuid, MachineState_T enmState)
{
RT_NOREF(strUuid, enmState);
return VINF_SUCCESS;
}
static DECLCALLBACK(int) VBoxModAPIMonitorOnServiceStateChanged(bool fAvailable)
{
if (!fAvailable)
{
serviceLog(("apimon: VBoxSVC became unavailable, triggering action\n"));
return apimonTrigger(g_enmAPIMonIslnResp);
}
return VINF_SUCCESS;
}
/**
* The 'apimonitor' module description.
*/
VBOXMODULE g_ModAPIMonitor =
{
/* pszName. */
VBOX_MOD_APIMON_NAME,
/* pszDescription. */
"API monitor for host isolation detection",
/* pszDepends. */
NULL,
/* uPriority. */
0 /* Not used */,
/* pszUsage. */
" [--apimon-groups=<string[,stringN]>]\n"
" [--apimon-isln-response=<cmd>] [--apimon-isln-timeout=<ms>]\n"
" [--apimon-resp-timeout=<ms>]",
/* pszOptions. */
" --apimon-groups=<string[,...]>\n"
" Sets the VM groups for monitoring (all), comma-separated list.\n"
" --apimon-isln-response=<cmd>\n"
" Sets the isolation response to one of: none, pause, poweroff,\n"
" save, or shutdown. Default: none\n"
" --apimon-isln-timeout=<ms>\n"
" Sets the isolation timeout in ms (30s).\n"
" --apimon-resp-timeout=<ms>\n"
" Sets the response timeout in ms (30s).\n",
/* methods. */
VBoxModAPIMonitorPreInit,
VBoxModAPIMonitorOption,
VBoxModAPIMonitorInit,
VBoxModAPIMonitorMain,
VBoxModAPIMonitorStop,
VBoxModAPIMonitorTerm,
/* callbacks. */
VBoxModAPIMonitorOnMachineRegistered,
VBoxModAPIMonitorOnMachineUnregistered,
VBoxModAPIMonitorOnMachineStateChanged,
VBoxModAPIMonitorOnServiceStateChanged
};
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