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Add support for another explicit IO error event

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This introduces a new event type

   VIR_DOMAIN_EVENT_ID_IO_ERROR_REASON

This event is the same as the previous VIR_DOMAIN_ID_IO_ERROR
event, but also includes a string describing the cause of
the event.

Thus there is a new callback definition for this event type

typedef void (*virConnectDomainEventIOErrorReasonCallback)(virConnectPtr conn,
                                                           virDomainPtr dom,
                                                           const char *srcPath,
                                                           const char *devAlias,
                                                           int action,
                                                           const char *reason,
                                                           void *opaque);

This is currently wired up to the QEMU block IO error events

* daemon/remote.c: Dispatch IO error events to client
* examples/domain-events/events-c/event-test.c: Watch for
  IO error events
* include/libvirt/libvirt.h.in: Define new IO error event ID
  and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
  src/libvirt_private.syms: Extend API to handle IO error events
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
  for block IO errors and emit a libvirt IO error event
* src/remote/remote_driver.c: Receive and dispatch IO error
  events to application
* src/remote/remote_protocol.x: Wire protocol definition for
  IO error events
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
  src/qemu/qemu_monitor_json.c: Watch for BLOCK_IO_ERROR event
  from QEMU monitor
This commit is contained in:
Daniel P. Berrange
2010-03-18 19:37:44 +00:00
parent c90a1ad7d0
commit 34dcbbb470
16 changed files with 313 additions and 21 deletions
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38
daemon/remote.c
View File

@@ -256,6 +256,43 @@ static int remoteRelayDomainEventIOError(virConnectPtr conn ATTRIBUTE_UNUSED,
}
static int remoteRelayDomainEventIOErrorReason(virConnectPtr conn ATTRIBUTE_UNUSED,
virDomainPtr dom,
const char *srcPath,
const char *devAlias,
int action,
const char *reason,
void *opaque)
{
struct qemud_client *client = opaque;
remote_domain_event_io_error_reason_msg data;
if (!client)
return -1;
REMOTE_DEBUG("Relaying domain io error %s %d %s %s %d %s",
dom->name, dom->id, srcPath, devAlias, action, reason);
virMutexLock(&client->lock);
/* build return data */
memset(&data, 0, sizeof data);
make_nonnull_domain (&data.dom, dom);
data.srcPath = (char*)srcPath;
data.devAlias = (char*)devAlias;
data.action = action;
data.reason = (char*)reason;
remoteDispatchDomainEventSend (client,
REMOTE_PROC_DOMAIN_EVENT_IO_ERROR_REASON,
(xdrproc_t)xdr_remote_domain_event_io_error_reason_msg, &data);
virMutexUnlock(&client->lock);
return 0;
}
static int remoteRelayDomainEventGraphics(virConnectPtr conn ATTRIBUTE_UNUSED,
virDomainPtr dom,
int phase,
@@ -327,6 +364,7 @@ static virConnectDomainEventGenericCallback domainEventCallbacks[] = {
VIR_DOMAIN_EVENT_CALLBACK(remoteRelayDomainEventWatchdog),
VIR_DOMAIN_EVENT_CALLBACK(remoteRelayDomainEventIOError),
VIR_DOMAIN_EVENT_CALLBACK(remoteRelayDomainEventGraphics),
VIR_DOMAIN_EVENT_CALLBACK(remoteRelayDomainEventIOErrorReason),
};
verify(ARRAY_CARDINALITY(domainEventCallbacks) == VIR_DOMAIN_EVENT_ID_LAST);