[libvirt] [PATCH v2] libvirt supports Guest Panicked
Chen Fan
chen.fan.fnst at cn.fujitsu.com
Tue May 28 06:14:46 UTC 2013
From: ChenFan <chen.fan.fnst at cn.fujitsu.com>
This patch implements qemu_driver supporting guest panicked.
we crashed the guest while libvirt isn't running, then restart libvirtd, we change the domain state to 'crashed'.
---
examples/domain-events/events-c/event-test.c | 10 +++
include/libvirt/libvirt.h.in | 16 +++++
src/conf/domain_conf.c | 12 ++--
src/qemu/qemu_monitor.c | 14 +++-
src/qemu/qemu_monitor.h | 5 ++
src/qemu/qemu_monitor_json.c | 7 ++
src/qemu/qemu_process.c | 103 ++++++++++++++++++++++++++-
tools/virsh-domain-monitor.c | 8 +++
8 files changed, 169 insertions(+), 6 deletions(-)
diff --git a/examples/domain-events/events-c/event-test.c b/examples/domain-events/events-c/event-test.c
index eeff50f..1b425fb 100644
--- a/examples/domain-events/events-c/event-test.c
+++ b/examples/domain-events/events-c/event-test.c
@@ -93,6 +93,9 @@ const char *eventToString(int event) {
case VIR_DOMAIN_EVENT_PMSUSPENDED:
ret = "PMSuspended";
break;
+ case VIR_DOMAIN_EVENT_CRASHED:
+ ret = "Crashed";
+ break;
}
return ret;
}
@@ -209,6 +212,13 @@ static const char *eventDetailToString(int event, int detail) {
break;
}
break;
+ case VIR_DOMAIN_EVENT_CRASHED:
+ switch ((virDomainEventCrashedDetailType) detail) {
+ case VIR_DOMAIN_EVENT_CRASHED_PANICKED:
+ ret = "Panicked";
+ break;
+ }
+ break;
}
return ret;
}
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index 1804c93..56c6c5c 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -155,6 +155,7 @@ typedef enum {
VIR_DOMAIN_RUNNING_SAVE_CANCELED = 7, /* returned from failed save process */
VIR_DOMAIN_RUNNING_WAKEUP = 8, /* returned from pmsuspended due to
wakeup event */
+ VIR_DOMAIN_RUNNING_CRASHED = 9, /* resumed from crashed */
#ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_RUNNING_LAST
@@ -180,6 +181,7 @@ typedef enum {
VIR_DOMAIN_PAUSED_FROM_SNAPSHOT = 7, /* paused after restoring from snapshot */
VIR_DOMAIN_PAUSED_SHUTTING_DOWN = 8, /* paused during shutdown process */
VIR_DOMAIN_PAUSED_SNAPSHOT = 9, /* paused while creating a snapshot */
+ VIR_DOMAIN_PAUSED_GUEST_PANICKED = 10, /* paused due to a guest panicked event */
#ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_PAUSED_LAST
@@ -189,6 +191,7 @@ typedef enum {
typedef enum {
VIR_DOMAIN_SHUTDOWN_UNKNOWN = 0, /* the reason is unknown */
VIR_DOMAIN_SHUTDOWN_USER = 1, /* shutting down on user request */
+ VIR_DOMAIN_SHUTDOWN_CRASHED = 2, /* domain crashed */
#ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_SHUTDOWN_LAST
@@ -212,6 +215,7 @@ typedef enum {
typedef enum {
VIR_DOMAIN_CRASHED_UNKNOWN = 0, /* crashed for unknown reason */
+ VIR_DOMAIN_CRASHED_PANICKED = 1, /* domain panicked */
#ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_CRASHED_LAST
@@ -3319,6 +3323,7 @@ typedef enum {
VIR_DOMAIN_EVENT_STOPPED = 5,
VIR_DOMAIN_EVENT_SHUTDOWN = 6,
VIR_DOMAIN_EVENT_PMSUSPENDED = 7,
+ VIR_DOMAIN_EVENT_CRASHED = 8,
#ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_EVENT_LAST
@@ -3450,6 +3455,17 @@ typedef enum {
#endif
} virDomainEventPMSuspendedDetailType;
+/*
+ * Details about the 'crashed' lifecycle event
+ */
+typedef enum {
+ VIR_DOMAIN_EVENT_CRASHED_PANICKED = 0, /* Guest was panicked */
+
+#ifdef VIR_ENUM_SENTINELS
+ VIR_DOMAIN_EVENT_CRASHED_LAST
+#endif
+} virDomainEventCrashedDetailType;
+
/**
* virConnectDomainEventCallback:
* @conn: virConnect connection
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index a9656af..f577fd4 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -642,7 +642,8 @@ VIR_ENUM_IMPL(virDomainRunningReason, VIR_DOMAIN_RUNNING_LAST,
"unpaused",
"migration canceled",
"save canceled",
- "wakeup")
+ "wakeup",
+ "from crashed")
VIR_ENUM_IMPL(virDomainBlockedReason, VIR_DOMAIN_BLOCKED_LAST,
"unknown")
@@ -657,11 +658,13 @@ VIR_ENUM_IMPL(virDomainPausedReason, VIR_DOMAIN_PAUSED_LAST,
"watchdog",
"from snapshot",
"shutdown",
- "snapshot")
+ "snapshot",
+ "guest panicked")
VIR_ENUM_IMPL(virDomainShutdownReason, VIR_DOMAIN_SHUTDOWN_LAST,
"unknown",
- "user")
+ "user",
+ "crashed")
VIR_ENUM_IMPL(virDomainShutoffReason, VIR_DOMAIN_SHUTOFF_LAST,
"unknown",
@@ -674,7 +677,8 @@ VIR_ENUM_IMPL(virDomainShutoffReason, VIR_DOMAIN_SHUTOFF_LAST,
"from snapshot")
VIR_ENUM_IMPL(virDomainCrashedReason, VIR_DOMAIN_CRASHED_LAST,
- "unknown")
+ "unknown",
+ "panicked")
VIR_ENUM_IMPL(virDomainPMSuspendedReason, VIR_DOMAIN_PMSUSPENDED_LAST,
"unknown")
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 4e35f79..e0cd62c 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-panicked")
typedef enum {
QEMU_MONITOR_BLOCK_IO_STATUS_OK,
@@ -1032,6 +1032,15 @@ int qemuMonitorEmitResume(qemuMonitorPtr mon)
}
+int qemuMonitorEmitGUESTPanicked(qemuMonitorPtr mon)
+{
+ int ret = -1;
+ VIR_DEBUG("mon=%p", mon);
+ QEMU_MONITOR_CALLBACK(mon, ret, domainGUESTPanicked, 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..543050c 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 (*domainGUESTPanicked)(qemuMonitorPtr mon,
+ virDomainObjPtr vm);
};
char *qemuMonitorEscapeArg(const char *in);
@@ -220,6 +222,8 @@ int qemuMonitorEmitBlockJob(qemuMonitorPtr mon,
int qemuMonitorEmitBalloonChange(qemuMonitorPtr mon,
unsigned long long actual);
int qemuMonitorEmitPMSuspendDisk(qemuMonitorPtr mon);
+int qemuMonitorEmitGUESTPanicked(qemuMonitorPtr mon);
+
int qemuMonitorStartCPUs(qemuMonitorPtr mon,
virConnectPtr conn);
@@ -239,6 +243,7 @@ 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..b6efa52 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 qemuMonitorJSONHandleGUESTPanicked(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", qemuMonitorJSONHandleGUESTPanicked, },
{ "POWERDOWN", qemuMonitorJSONHandlePowerdown, },
{ "RESET", qemuMonitorJSONHandleReset, },
{ "RESUME", qemuMonitorJSONHandleResume, },
@@ -593,6 +595,11 @@ static void qemuMonitorJSONHandleResume(qemuMonitorPtr mon, virJSONValuePtr data
qemuMonitorEmitResume(mon);
}
+static void qemuMonitorJSONHandleGUESTPanicked(qemuMonitorPtr mon, virJSONValuePtr data ATTRIBUTE_UNUSED)
+{
+ qemuMonitorEmitGUESTPanicked(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 d4fd4fb..29c8c4b 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,
@@ -1269,6 +1273,98 @@ qemuProcessHandlePMSuspendDisk(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
return 0;
}
+static int
+qemuProcessHandleGUESTPanicked(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
+ virDomainObjPtr vm)
+{
+ virQEMUDriverPtr driver = qemu_driver;
+ qemuDomainObjPrivatePtr priv;
+ virDomainEventPtr event = NULL;
+ bool isReboot = true;
+ virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
+
+ VIR_DEBUG("vm=%p", vm);
+
+ virObjectLock(vm);
+
+ if (!virDomainObjIsActive(vm)) {
+ VIR_DEBUG("Ignoring GUEST_PANICKED event from inactive domain %s",
+ vm->def->name);
+ goto cleanup;
+ }
+
+ priv = vm->privateData;
+
+ virDomainObjSetState(vm,
+ VIR_DOMAIN_CRASHED,
+ VIR_DOMAIN_CRASHED_PANICKED);
+
+ event = virDomainEventNewFromObj(vm,
+ VIR_DOMAIN_EVENT_CRASHED,
+ VIR_DOMAIN_EVENT_CRASHED_PANICKED);
+
+ if (vm->def->onCrash == VIR_DOMAIN_LIFECYCLE_CRASH_PRESERVE) {
+ VIR_FREE(priv->lockState);
+
+ 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);
+ }
+
+ goto cleanup;
+ }
+
+ if (vm->def->onCrash == VIR_DOMAIN_LIFECYCLE_CRASH_DESTROY) {
+ isReboot = false;
+ VIR_INFO("Domain on_crash setting overridden, shutting down");
+ }
+
+ qemuDomainSetFakeReboot(driver, vm, isReboot);
+
+ if (isReboot) {
+ qemuProcessShutdownOrReboot(driver, vm);
+ } else {
+ 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);
+
+ virDomainAuditStop(vm, "destroyed");
+
+ if (! vm->persistent) {
+ qemuDomainRemoveInactive(driver, vm);
+ vm = NULL;
+ }
+ }
+
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ if (event)
+ qemuDomainEventQueue(driver, event);
+ virObjectUnref(cfg);
+
+ return 0;
+}
static qemuMonitorCallbacks monitorCallbacks = {
.destroy = qemuProcessHandleMonitorDestroy,
@@ -1289,6 +1385,7 @@ static qemuMonitorCallbacks monitorCallbacks = {
.domainPMSuspend = qemuProcessHandlePMSuspend,
.domainBalloonChange = qemuProcessHandleBalloonChange,
.domainPMSuspendDisk = qemuProcessHandlePMSuspendDisk,
+ .domainGUESTPanicked = qemuProcessHandleGUESTPanicked,
};
static int
@@ -2673,6 +2770,10 @@ 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, "was crashed"));
} else {
newState = VIR_DOMAIN_PAUSED;
newReason = reason;
diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
index 5ed89d1..4bddefe 100644
--- a/tools/virsh-domain-monitor.c
+++ b/tools/virsh-domain-monitor.c
@@ -192,6 +192,8 @@ vshDomainStateReasonToString(int state, int reason)
return N_("save canceled");
case VIR_DOMAIN_RUNNING_WAKEUP:
return N_("event wakeup");
+ case VIR_DOMAIN_RUNNING_CRASHED:
+ return N_("from crashed");
case VIR_DOMAIN_RUNNING_UNKNOWN:
case VIR_DOMAIN_RUNNING_LAST:
;
@@ -226,6 +228,8 @@ vshDomainStateReasonToString(int state, int reason)
return N_("shutting down");
case VIR_DOMAIN_PAUSED_SNAPSHOT:
return N_("creating snapshot");
+ case VIR_DOMAIN_PAUSED_GUEST_PANICKED:
+ return N_("guest panicked");
case VIR_DOMAIN_PAUSED_UNKNOWN:
case VIR_DOMAIN_PAUSED_LAST:
;
@@ -236,6 +240,8 @@ vshDomainStateReasonToString(int state, int reason)
switch ((virDomainShutdownReason) reason) {
case VIR_DOMAIN_SHUTDOWN_USER:
return N_("user");
+ case VIR_DOMAIN_SHUTDOWN_CRASHED:
+ return N_("crashed");
case VIR_DOMAIN_SHUTDOWN_UNKNOWN:
case VIR_DOMAIN_SHUTDOWN_LAST:
;
@@ -266,6 +272,8 @@ vshDomainStateReasonToString(int state, int reason)
case VIR_DOMAIN_CRASHED:
switch ((virDomainCrashedReason) reason) {
+ case VIR_DOMAIN_CRASHED_PANICKED:
+ return N_("panicked");
case VIR_DOMAIN_CRASHED_UNKNOWN:
case VIR_DOMAIN_CRASHED_LAST:
;
--
1.8.1.4
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