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Add event callbacks to libxl driver
* src/libxl/libxl_conf.h: add the necessary fields to the driver private structure * src/libxl/libxl_driver.c: add lifecycle event support and entry points for event(de)register(any)
This commit is contained in:
Markus Groß
Daniel Veillard
parent
6d60ca5d58
commit
68e1032378
@ -26,6 +26,7 @@
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# include "internal.h"
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# include "domain_conf.h"
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# include "domain_event.h"
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# include "capabilities.h"
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# include "configmake.h"
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# include "bitmap.h"
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@ -57,6 +58,12 @@ struct _libxlDriverPrivate {
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virBitmapPtr reservedVNCPorts;
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virDomainObjList domains;
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/* A list of callbacks */
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virDomainEventCallbackListPtr domainEventCallbacks;
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virDomainEventQueuePtr domainEventQueue;
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int domainEventTimer;
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int domainEventDispatching;
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char *configDir;
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char *autostartDir;
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char *logDir;
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@ -87,5 +94,4 @@ int
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libxlBuildDomainConfig(libxlDriverPrivatePtr driver,
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virDomainDefPtr def, libxl_domain_config *d_config);
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#endif /* LIBXL_CONF_H */
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@ -99,6 +99,58 @@ libxlDomainObjPrivateFree(void *data)
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VIR_FREE(priv);
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}
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static void
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libxlDomainEventDispatchFunc(virConnectPtr conn, virDomainEventPtr event,
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virConnectDomainEventGenericCallback cb,
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void *cbopaque, void *opaque)
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{
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libxlDriverPrivatePtr driver = opaque;
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/* Drop the lock whle dispatching, for sake of re-entrancy */
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libxlDriverUnlock(driver);
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virDomainEventDispatchDefaultFunc(conn, event, cb, cbopaque, NULL);
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libxlDriverLock(driver);
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}
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static void
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libxlDomainEventFlush(int timer ATTRIBUTE_UNUSED, void *opaque)
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{
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libxlDriverPrivatePtr driver = opaque;
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virDomainEventQueue tempQueue;
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libxlDriverLock(driver);
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driver->domainEventDispatching = 1;
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/* Copy the queue, so we're reentrant safe */
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tempQueue.count = driver->domainEventQueue->count;
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tempQueue.events = driver->domainEventQueue->events;
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driver->domainEventQueue->count = 0;
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driver->domainEventQueue->events = NULL;
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virEventUpdateTimeout(driver->domainEventTimer, -1);
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virDomainEventQueueDispatch(&tempQueue,
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driver->domainEventCallbacks,
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libxlDomainEventDispatchFunc,
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driver);
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/* Purge any deleted callbacks */
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virDomainEventCallbackListPurgeMarked(driver->domainEventCallbacks);
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driver->domainEventDispatching = 0;
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libxlDriverUnlock(driver);
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}
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/* driver must be locked before calling */
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static void
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libxlDomainEventQueue(libxlDriverPrivatePtr driver, virDomainEventPtr event)
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{
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if (virDomainEventQueuePush(driver->domainEventQueue, event) < 0)
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virDomainEventFree(event);
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if (driver->domainEventQueue->count == 1)
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virEventUpdateTimeout(driver->domainEventTimer, 0);
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}
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/*
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* Remove reference to domain object.
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*/
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@ -187,6 +239,7 @@ static void libxlEventHandler(int watch,
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libxlDriverPrivatePtr driver = libxl_driver;
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virDomainObjPtr vm = data;
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libxlDomainObjPrivatePtr priv;
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virDomainEventPtr dom_event = NULL;
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libxl_event event;
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libxl_dominfo info;
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@ -225,6 +278,10 @@ static void libxlEventHandler(int watch,
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switch (info.shutdown_reason) {
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case SHUTDOWN_poweroff:
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case SHUTDOWN_crash:
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if (info.shutdown_reason == SHUTDOWN_crash)
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dom_event = virDomainEventNewFromObj(vm,
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VIR_DOMAIN_EVENT_STOPPED,
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VIR_DOMAIN_EVENT_STOPPED_CRASHED);
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libxlVmReap(driver, vm, 0);
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if (!vm->persistent) {
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virDomainRemoveInactive(&driver->domains, vm);
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@ -244,6 +301,11 @@ static void libxlEventHandler(int watch,
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cleanup:
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if (vm)
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virDomainObjUnlock(vm);
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if (dom_event) {
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libxlDriverLock(driver);
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libxlDomainEventQueue(driver, dom_event);
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libxlDriverUnlock(driver);
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}
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libxl_free_event(&event);
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}
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@ -303,6 +365,7 @@ libxlVmStart(libxlDriverPrivatePtr driver,
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{
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libxl_domain_config d_config;
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virDomainDefPtr def = vm->def;
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virDomainEventPtr event = NULL;
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int ret;
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uint32_t domid = 0;
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char *dom_xml = NULL;
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@ -347,9 +410,14 @@ libxlVmStart(libxlDriverPrivatePtr driver,
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vm->state = VIR_DOMAIN_PAUSED;
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}
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if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0)
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goto error;
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event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED,
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VIR_DOMAIN_EVENT_STARTED_BOOTED);
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libxlDomainEventQueue(driver, event);
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libxl_domain_config_destroy(&d_config);
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VIR_FREE(dom_xml);
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return 0;
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@ -447,6 +515,13 @@ libxlShutdown(void)
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VIR_FREE(libxl_driver->libDir);
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VIR_FREE(libxl_driver->saveDir);
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/* Free domain callback list */
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virDomainEventCallbackListFree(libxl_driver->domainEventCallbacks);
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virDomainEventQueueFree(libxl_driver->domainEventQueue);
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if (libxl_driver->domainEventTimer != -1)
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virEventRemoveTimeout(libxl_driver->domainEventTimer);
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libxlDriverUnlock(libxl_driver);
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virMutexDestroy(&libxl_driver->lock);
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VIR_FREE(libxl_driver);
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@ -556,6 +631,16 @@ libxlStartup(int privileged) {
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}
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VIR_FREE(log_file);
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/* Init callback list */
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if (VIR_ALLOC(libxl_driver->domainEventCallbacks) < 0)
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goto out_of_memory;
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if (!(libxl_driver->domainEventQueue = virDomainEventQueueNew()))
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goto out_of_memory;
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if ((libxl_driver->domainEventTimer =
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virEventAddTimeout(-1, libxlDomainEventFlush, libxl_driver, NULL)) < 0)
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goto error;
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libxl_driver->logger =
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(xentoollog_logger *)xtl_createlogger_stdiostream(libxl_driver->logger_file, XTL_DEBUG, 0);
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if (!libxl_driver->logger) {
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@ -698,6 +783,11 @@ libxlOpen(virConnectPtr conn,
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static int
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libxlClose(virConnectPtr conn ATTRIBUTE_UNUSED)
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{
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libxlDriverPrivatePtr driver = conn->privateData;
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libxlDriverLock(driver);
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virDomainEventCallbackListRemoveConn(conn, driver->domainEventCallbacks);
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libxlDriverUnlock(driver);
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conn->privateData = NULL;
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return 0;
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}
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@ -1026,6 +1116,7 @@ libxlDomainDestroy(virDomainPtr dom)
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virDomainObjPtr vm;
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int ret = -1;
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libxlDomainObjPrivatePtr priv;
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virDomainEventPtr event = NULL;
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libxlDriverLock(driver);
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vm = virDomainFindByUUID(&driver->domains, dom->uuid);
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@ -1043,6 +1134,9 @@ libxlDomainDestroy(virDomainPtr dom)
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goto cleanup;
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}
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event = virDomainEventNewFromObj(vm,VIR_DOMAIN_EVENT_STOPPED,
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VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
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priv = vm->privateData;
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if (libxlVmReap(driver, vm, 1) != 0) {
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libxlError(VIR_ERR_INTERNAL_ERROR,
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@ -1060,6 +1154,8 @@ libxlDomainDestroy(virDomainPtr dom)
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cleanup:
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if (vm)
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virDomainObjUnlock(vm);
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if (event)
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libxlDomainEventQueue(driver, event);
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libxlDriverUnlock(driver);
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return ret;
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}
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@ -1308,6 +1404,7 @@ libxlDomainDefineXML(virConnectPtr conn, const char *xml)
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virDomainDefPtr def = NULL;
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virDomainObjPtr vm = NULL;
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virDomainPtr dom = NULL;
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virDomainEventPtr event = NULL;
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int dupVM;
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libxlDriverLock(driver);
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@ -1335,10 +1432,17 @@ libxlDomainDefineXML(virConnectPtr conn, const char *xml)
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if (dom)
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dom->id = vm->def->id;
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event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_DEFINED,
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!dupVM ?
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VIR_DOMAIN_EVENT_DEFINED_ADDED :
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VIR_DOMAIN_EVENT_DEFINED_UPDATED);
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cleanup:
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virDomainDefFree(def);
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if (vm)
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virDomainObjUnlock(vm);
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if (event)
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libxlDomainEventQueue(driver, event);
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libxlDriverUnlock(driver);
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return dom;
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}
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@ -1348,6 +1452,7 @@ libxlDomainUndefine(virDomainPtr dom)
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{
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libxlDriverPrivatePtr driver = dom->conn->privateData;
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virDomainObjPtr vm;
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virDomainEventPtr event = NULL;
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int ret = -1;
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libxlDriverLock(driver);
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@ -1379,6 +1484,9 @@ libxlDomainUndefine(virDomainPtr dom)
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vm) < 0)
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goto cleanup;
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event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_UNDEFINED,
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VIR_DOMAIN_EVENT_UNDEFINED_REMOVED);
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virDomainRemoveInactive(&driver->domains, vm);
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vm = NULL;
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ret = 0;
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@ -1386,6 +1494,8 @@ libxlDomainUndefine(virDomainPtr dom)
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cleanup:
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if (vm)
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virDomainObjUnlock(vm);
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if (event)
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libxlDomainEventQueue(driver, event);
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libxlDriverUnlock(driver);
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return ret;
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}
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@ -1410,6 +1520,44 @@ libxlNodeGetFreeMemory(virConnectPtr conn)
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return phy_info.free_pages * ver_info->pagesize;
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}
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static int
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libxlDomainEventRegister(virConnectPtr conn,
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virConnectDomainEventCallback callback, void *opaque,
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virFreeCallback freecb)
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{
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libxlDriverPrivatePtr driver = conn->privateData;
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int ret;
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libxlDriverLock(driver);
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ret = virDomainEventCallbackListAdd(conn, driver->domainEventCallbacks,
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callback, opaque, freecb);
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libxlDriverUnlock(driver);
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return ret;
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}
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static int
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libxlDomainEventDeregister(virConnectPtr conn,
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virConnectDomainEventCallback callback)
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{
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libxlDriverPrivatePtr driver = conn->privateData;
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int ret;
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libxlDriverLock(driver);
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if (driver->domainEventDispatching)
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ret = virDomainEventCallbackListMarkDelete(conn,
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driver->domainEventCallbacks,
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callback);
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else
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ret = virDomainEventCallbackListRemove(conn,
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driver->domainEventCallbacks,
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callback);
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libxlDriverUnlock(driver);
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return ret;
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}
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static int
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libxlDomainIsActive(virDomainPtr dom)
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{
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@ -1454,6 +1602,44 @@ libxlDomainIsPersistent(virDomainPtr dom)
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return ret;
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}
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static int
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libxlDomainEventRegisterAny(virConnectPtr conn, virDomainPtr dom, int eventID,
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virConnectDomainEventGenericCallback callback,
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void *opaque, virFreeCallback freecb)
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{
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libxlDriverPrivatePtr driver = conn->privateData;
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int ret;
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libxlDriverLock(driver);
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ret = virDomainEventCallbackListAddID(conn, driver->domainEventCallbacks,
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dom, eventID, callback, opaque,
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freecb);
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libxlDriverUnlock(driver);
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return ret;
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}
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static int
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libxlDomainEventDeregisterAny(virConnectPtr conn, int callbackID)
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{
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libxlDriverPrivatePtr driver = conn->privateData;
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int ret;
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libxlDriverLock(driver);
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if (driver->domainEventDispatching)
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ret = virDomainEventCallbackListMarkDeleteID(conn,
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driver->domainEventCallbacks,
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callbackID);
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else
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ret = virDomainEventCallbackListRemoveID(conn,
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driver->domainEventCallbacks,
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callbackID);
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libxlDriverUnlock(driver);
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return ret;
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}
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static virDriver libxlDriver = {
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VIR_DRV_LIBXL,
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@ -1531,8 +1717,8 @@ static virDriver libxlDriver = {
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NULL, /* domainGetBlockInfo */
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NULL, /* nodeGetCellsFreeMemory */
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libxlNodeGetFreeMemory, /* getFreeMemory */
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NULL, /* domainEventRegister */
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NULL, /* domainEventDeregister */
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libxlDomainEventRegister, /* domainEventRegister */
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libxlDomainEventDeregister, /* domainEventDeregister */
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NULL, /* domainMigratePrepare2 */
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NULL, /* domainMigrateFinish2 */
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NULL, /* nodeDeviceDettach */
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@ -1550,8 +1736,8 @@ static virDriver libxlDriver = {
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NULL, /* domainAbortJob */
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NULL, /* domainMigrateSetMaxDowntime */
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NULL, /* domainMigrateSetMaxSpeed */
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NULL, /* domainEventRegisterAny */
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NULL, /* domainEventDeregisterAny */
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libxlDomainEventRegisterAny,/* domainEventRegisterAny */
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libxlDomainEventDeregisterAny,/* domainEventDeregisterAny */
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NULL, /* domainManagedSave */
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NULL, /* domainHasManagedSaveImage */
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NULL, /* domainManagedSaveRemove */
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