[libvirt] [PATCH v6 4/5] qemu: Implement 'oncrash' events when guest panicked
Chen Fan
chen.fan.fnst at cn.fujitsu.com
Fri Jun 7 10:23:34 UTC 2013
Add monitor callback API domainGuestPanic, that implements
'destroy', 'restart' and 'preserve' events of the 'on_crash'
in the XML when domain crashed.
---
src/qemu/qemu_domain.h | 1 +
src/qemu/qemu_driver.c | 92 ++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor.c | 14 ++++++-
src/qemu/qemu_monitor.h | 4 ++
src/qemu/qemu_monitor_json.c | 7 ++++
src/qemu/qemu_process.c | 45 +++++++++++++++++++++-
6 files changed, 161 insertions(+), 2 deletions(-)
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index aedb66b..ac3eea9 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -172,6 +172,7 @@ struct _qemuDomainObjPrivate {
typedef enum {
QEMU_PROCESS_EVENT_WATCHDOG = 0,
+ QEMU_PROCESS_EVENT_GUESTPANIC,
QEMU_PROCESS_EVENT_LAST
} qemuProcessEventType;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 16f826c..24df772 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -137,6 +137,10 @@ static void processWatchdogEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm,
int action);
+static void processGuestPanicEvent(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ int action);
+
static void qemuProcessEventHandler(void *data, void *opaque);
static int qemuStateCleanup(void);
@@ -3509,18 +3513,106 @@ cleanup:
virObjectUnref(cfg);
}
+static void
+processGuestPanicEvent(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ int action)
+{
+ qemuDomainObjPrivatePtr priv = vm->privateData;
+ virDomainEventPtr event = NULL;
+ virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
+
+ if (!virDomainObjIsActive(vm)) {
+ VIR_DEBUG("Ignoring GUEST_PANICKED event from inactive domain %s",
+ vm->def->name);
+ goto cleanup;
+ }
+
+ virDomainObjSetState(vm,
+ VIR_DOMAIN_CRASHED,
+ VIR_DOMAIN_CRASHED_PANICKED);
+
+ event = virDomainEventNewFromObj(vm,
+ VIR_DOMAIN_EVENT_CRASHED,
+ VIR_DOMAIN_EVENT_CRASHED_PANICKED);
+
+ if (event)
+ qemuDomainEventQueue(driver, event);
+
+ if (virDomainLockProcessPause(driver->lockManager, vm, &priv->lockState) < 0)
+ VIR_WARN("Unable to release lease on %s", vm->def->name);
+ VIR_DEBUG("Preserving lock state '%s'", NULLSTR(priv->lockState));
+
+ if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0) {
+ VIR_WARN("Unable to save status on vm %s after state change",
+ vm->def->name);
+ }
+
+ switch (action) {
+ case VIR_DOMAIN_LIFECYCLE_CRASH_DESTROY:
+ priv->beingDestroyed = true;
+
+ if (qemuProcessKill(vm, VIR_QEMU_PROCESS_KILL_FORCE) < 0) {
+ priv->beingDestroyed = false;
+ goto cleanup;
+ }
+
+ priv->beingDestroyed = false;
+
+ if (!virDomainObjIsActive(vm)) {
+ virReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("domain is not running"));
+ goto cleanup;
+ }
+
+ qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_CRASHED, 0);
+ event = virDomainEventNewFromObj(vm,
+ VIR_DOMAIN_EVENT_STOPPED,
+ VIR_DOMAIN_EVENT_STOPPED_CRASHED);
+
+ if (event)
+ qemuDomainEventQueue(driver, event);
+
+ virDomainAuditStop(vm, "destroyed");
+
+ if (!vm->persistent) {
+ qemuDomainRemoveInactive(driver, vm);
+ }
+ break;
+
+ case VIR_DOMAIN_LIFECYCLE_CRASH_RESTART:
+ qemuDomainSetFakeReboot(driver, vm, true);
+ qemuProcessShutdownOrReboot(driver, vm);
+ break;
+
+ case VIR_DOMAIN_LIFECYCLE_CRASH_PRESERVE:
+ break;
+
+ default:
+ break;
+ }
+
+cleanup:
+ virObjectUnref(cfg);
+}
+
static void qemuProcessEventHandler(void *data, void *opaque)
{
struct qemuProcessEvent *processEvent = data;
virDomainObjPtr vm = processEvent->vm;
virQEMUDriverPtr driver = opaque;
+ VIR_DEBUG("vm=%p", vm);
+
virObjectLock(vm);
switch (processEvent->eventType) {
case QEMU_PROCESS_EVENT_WATCHDOG:
processWatchdogEvent(driver, vm, processEvent->action);
break;
+ case QEMU_PROCESS_EVENT_GUESTPANIC:
+ processGuestPanicEvent(driver, vm, processEvent->action);
+ break;
default:
break;
}
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 4e35f79..442f6fa 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -113,7 +113,7 @@ VIR_ENUM_IMPL(qemuMonitorVMStatus,
QEMU_MONITOR_VM_STATUS_LAST,
"debug", "inmigrate", "internal-error", "io-error", "paused",
"postmigrate", "prelaunch", "finish-migrate", "restore-vm",
- "running", "save-vm", "shutdown", "watchdog")
+ "running", "save-vm", "shutdown", "watchdog", "guest-panic")
typedef enum {
QEMU_MONITOR_BLOCK_IO_STATUS_OK,
@@ -1032,6 +1032,15 @@ int qemuMonitorEmitResume(qemuMonitorPtr mon)
}
+int qemuMonitorEmitGuestPanic(qemuMonitorPtr mon)
+{
+ int ret = -1;
+ VIR_DEBUG("mon=%p", mon);
+ QEMU_MONITOR_CALLBACK(mon, ret, domainGuestPanic, mon->vm);
+ return ret;
+}
+
+
int qemuMonitorEmitRTCChange(qemuMonitorPtr mon, long long offset)
{
int ret = -1;
@@ -3185,6 +3194,9 @@ int qemuMonitorVMStatusToPausedReason(const char *status)
case QEMU_MONITOR_VM_STATUS_WATCHDOG:
return VIR_DOMAIN_PAUSED_WATCHDOG;
+ case QEMU_MONITOR_VM_STATUS_GUEST_PANICKED:
+ return VIR_DOMAIN_PAUSED_GUEST_PANICKED;
+
/* unreachable from this point on */
case QEMU_MONITOR_VM_STATUS_LAST:
;
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index a607712..f0a8c6f 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -140,6 +140,8 @@ struct _qemuMonitorCallbacks {
unsigned long long actual);
int (*domainPMSuspendDisk)(qemuMonitorPtr mon,
virDomainObjPtr vm);
+ int (*domainGuestPanic)(qemuMonitorPtr mon,
+ virDomainObjPtr vm);
};
char *qemuMonitorEscapeArg(const char *in);
@@ -220,6 +222,7 @@ int qemuMonitorEmitBlockJob(qemuMonitorPtr mon,
int qemuMonitorEmitBalloonChange(qemuMonitorPtr mon,
unsigned long long actual);
int qemuMonitorEmitPMSuspendDisk(qemuMonitorPtr mon);
+int qemuMonitorEmitGuestPanic(qemuMonitorPtr mon);
int qemuMonitorStartCPUs(qemuMonitorPtr mon,
virConnectPtr conn);
@@ -239,6 +242,7 @@ typedef enum {
QEMU_MONITOR_VM_STATUS_SAVE_VM,
QEMU_MONITOR_VM_STATUS_SHUTDOWN,
QEMU_MONITOR_VM_STATUS_WATCHDOG,
+ QEMU_MONITOR_VM_STATUS_GUEST_PANICKED,
QEMU_MONITOR_VM_STATUS_LAST
} qemuMonitorVMStatus;
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 2b73884..2dd832c 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -74,6 +74,7 @@ static void qemuMonitorJSONHandleBlockJobCanceled(qemuMonitorPtr mon, virJSONVal
static void qemuMonitorJSONHandleBlockJobReady(qemuMonitorPtr mon, virJSONValuePtr data);
static void qemuMonitorJSONHandleBalloonChange(qemuMonitorPtr mon, virJSONValuePtr data);
static void qemuMonitorJSONHandlePMSuspendDisk(qemuMonitorPtr mon, virJSONValuePtr data);
+static void qemuMonitorJSONHandleGuestPanic(qemuMonitorPtr mon, virJSONValuePtr data);
typedef struct {
const char *type;
@@ -87,6 +88,7 @@ static qemuEventHandler eventHandlers[] = {
{ "BLOCK_JOB_COMPLETED", qemuMonitorJSONHandleBlockJobCompleted, },
{ "BLOCK_JOB_READY", qemuMonitorJSONHandleBlockJobReady, },
{ "DEVICE_TRAY_MOVED", qemuMonitorJSONHandleTrayChange, },
+ { "GUEST_PANICKED", qemuMonitorJSONHandleGuestPanic, },
{ "POWERDOWN", qemuMonitorJSONHandlePowerdown, },
{ "RESET", qemuMonitorJSONHandleReset, },
{ "RESUME", qemuMonitorJSONHandleResume, },
@@ -593,6 +595,11 @@ static void qemuMonitorJSONHandleResume(qemuMonitorPtr mon, virJSONValuePtr data
qemuMonitorEmitResume(mon);
}
+static void qemuMonitorJSONHandleGuestPanic(qemuMonitorPtr mon, virJSONValuePtr data ATTRIBUTE_UNUSED)
+{
+ qemuMonitorEmitGuestPanic(mon);
+}
+
static void qemuMonitorJSONHandleRTCChange(qemuMonitorPtr mon, virJSONValuePtr data)
{
long long offset = 0;
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 163bd96..0658d91 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -548,6 +548,7 @@ qemuProcessFakeReboot(void *opaque)
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainEventPtr event = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
+ virDomainRunningReason reason = VIR_DOMAIN_RUNNING_BOOTED;
int ret = -1;
VIR_DEBUG("vm=%p", vm);
virObjectLock(vm);
@@ -573,8 +574,11 @@ qemuProcessFakeReboot(void *opaque)
goto endjob;
}
+ if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_CRASHED)
+ reason = VIR_DOMAIN_RUNNING_CRASHED;
+
if (qemuProcessStartCPUs(driver, vm, NULL,
- VIR_DOMAIN_RUNNING_BOOTED,
+ reason,
QEMU_ASYNC_JOB_NONE) < 0) {
if (virGetLastError() == NULL)
virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -1271,6 +1275,40 @@ qemuProcessHandlePMSuspendDisk(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
}
+static int
+qemuProcessHandleGuestPanic(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
+ virDomainObjPtr vm)
+{
+ virQEMUDriverPtr driver = qemu_driver;
+ struct qemuProcessEvent *processEvent;
+
+ virObjectLock(vm);
+ if (VIR_ALLOC(processEvent) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ processEvent->eventType = QEMU_PROCESS_EVENT_GUESTPANIC;
+ processEvent->action = vm->def->onCrash;
+ processEvent->vm = vm;
+ /* Hold an extra reference because we can't allow 'vm' to be
+ * deleted before handling guest panic event is finished.
+ */
+ virObjectRef(vm);
+ if (virThreadPoolSendJob(driver->workerPool, 0, processEvent) < 0) {
+ if (!virObjectUnref(vm))
+ vm = NULL;
+ VIR_FREE(processEvent);
+ }
+
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+
+ return 0;
+}
+
+
static qemuMonitorCallbacks monitorCallbacks = {
.destroy = qemuProcessHandleMonitorDestroy,
.eofNotify = qemuProcessHandleMonitorEOF,
@@ -1290,6 +1328,7 @@ static qemuMonitorCallbacks monitorCallbacks = {
.domainPMSuspend = qemuProcessHandlePMSuspend,
.domainBalloonChange = qemuProcessHandleBalloonChange,
.domainPMSuspendDisk = qemuProcessHandlePMSuspendDisk,
+ .domainGuestPanic = qemuProcessHandleGuestPanic,
};
static int
@@ -2674,6 +2713,10 @@ qemuProcessUpdateState(virQEMUDriverPtr driver, virDomainObjPtr vm)
newState = VIR_DOMAIN_SHUTDOWN;
newReason = VIR_DOMAIN_SHUTDOWN_UNKNOWN;
ignore_value(VIR_STRDUP_QUIET(msg, "shutdown"));
+ } else if (reason == VIR_DOMAIN_PAUSED_GUEST_PANICKED) {
+ newState = VIR_DOMAIN_CRASHED;
+ newReason = VIR_DOMAIN_CRASHED_PANICKED;
+ ignore_value(VIR_STRDUP_QUIET(msg, "crashed"));
} else {
newState = VIR_DOMAIN_PAUSED;
newReason = reason;
--
1.8.1.4
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