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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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23
include/libvirt/libvirt.h.in
View File

@@ -2053,6 +2053,28 @@ typedef void (*virConnectDomainEventIOErrorCallback)(virConnectPtr conn,
int action,
void *opaque);
/**
* virConnectDomainEventWatchdogCallback:
* @conn: connection object
* @dom: domain on which the event occurred
* @srcPath: The host file on which the IO error occurred
* @devAlias: The guest device alias associated with the path
* @action: action that is to be taken due to the IO error
* @reason: the cause of the IO error
* @opaque: application specified data
*
* The callback signature to use when registering for an event of type
* VIR_DOMAIN_EVENT_ID_IO_ERROR with virConnectDomainEventRegisterAny()
*
*/
typedef void (*virConnectDomainEventIOErrorReasonCallback)(virConnectPtr conn,
virDomainPtr dom,
const char *srcPath,
const char *devAlias,
int action,
const char *reason,
void *opaque);
/**
* virDomainEventGraphicsPhase:
*
@@ -2161,6 +2183,7 @@ typedef enum {
VIR_DOMAIN_EVENT_ID_WATCHDOG = 3, /* virConnectDomainEventWatchdogCallback */
VIR_DOMAIN_EVENT_ID_IO_ERROR = 4, /* virConnectDomainEventIOErrorCallback */
VIR_DOMAIN_EVENT_ID_GRAPHICS = 5, /* virConnectDomainEventGraphicsCallback */
VIR_DOMAIN_EVENT_ID_IO_ERROR_REASON = 6, /* virConnectDomainEventIOErrorReasonCallback */
/*
* NB: this enum value will increase over time as new events are