mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-09-19 22:21:27 +00:00
c1ff5dc63d
There are two classes of management apps that track events - one that only cares about on/off (and only needs to track EVENT_STARTED and EVENT_STOPPED), and one that cares about paused/running (also tracks EVENT_SUSPENDED/EVENT_RESUMED). To keep both classes happy, any transition that can go from inactive to paused must emit two back-to-back events - one for started and one for suspended (since later resuming of the domain will only send RESUMED, but the first class isn't tracking that). This also fixes a bug where virDomainCreateWithFlags with the VIR_DOMAIN_START_PAUSED flag failed to start paused when restoring from a managed save image. * include/libvirt/libvirt.h.in (VIR_DOMAIN_EVENT_SUSPENDED_RESTORED) (VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT) (VIR_DOMAIN_EVENT_RESUMED_FROM_SNAPSHOT): New sub-events. * src/qemu/qemu_driver.c (qemuDomainRevertToSnapshot): Use them. (qemuDomainSaveImageStartVM): Likewise, and add parameter. (qemudDomainCreate, qemuDomainObjStart): Send suspended event when starting paused. (qemuDomainObjRestore): Add parameter. (qemuDomainObjStart, qemuDomainRestoreFlags): Update callers. * examples/domain-events/events-c/event-test.c (eventDetailToString): Map new detail strings.
421 lines
15 KiB
C
421 lines
15 KiB
C
#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include <libvirt/libvirt.h>
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#include <libvirt/virterror.h>
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#define VIR_DEBUG(fmt) printf("%s:%d: " fmt "\n", __func__, __LINE__)
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#define STREQ(a,b) (strcmp(a,b) == 0)
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#ifndef ATTRIBUTE_UNUSED
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# define ATTRIBUTE_UNUSED __attribute__((__unused__))
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#endif
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/* Prototypes */
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const char *eventToString(int event);
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int myEventAddHandleFunc (int fd, int event,
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virEventHandleCallback cb,
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void *opaque,
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virFreeCallback ff);
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void myEventUpdateHandleFunc(int watch, int event);
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int myEventRemoveHandleFunc(int watch);
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int myEventAddTimeoutFunc(int timeout,
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virEventTimeoutCallback cb,
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void *opaque,
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virFreeCallback ff);
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void myEventUpdateTimeoutFunc(int timer, int timout);
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int myEventRemoveTimeoutFunc(int timer);
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int myEventHandleTypeToPollEvent(virEventHandleType events);
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virEventHandleType myPollEventToEventHandleType(int events);
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void usage(const char *pname);
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/* Callback functions */
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const char *eventToString(int event) {
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const char *ret = "";
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switch(event) {
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case VIR_DOMAIN_EVENT_DEFINED:
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ret ="Defined";
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break;
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case VIR_DOMAIN_EVENT_UNDEFINED:
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ret ="Undefined";
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break;
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case VIR_DOMAIN_EVENT_STARTED:
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ret ="Started";
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break;
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case VIR_DOMAIN_EVENT_SUSPENDED:
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ret ="Suspended";
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break;
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case VIR_DOMAIN_EVENT_RESUMED:
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ret ="Resumed";
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break;
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case VIR_DOMAIN_EVENT_STOPPED:
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ret ="Stopped";
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break;
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}
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return ret;
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}
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static const char *eventDetailToString(int event, int detail) {
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const char *ret = "";
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switch(event) {
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case VIR_DOMAIN_EVENT_DEFINED:
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if (detail == VIR_DOMAIN_EVENT_DEFINED_ADDED)
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ret = "Added";
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else if (detail == VIR_DOMAIN_EVENT_DEFINED_UPDATED)
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ret = "Updated";
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break;
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case VIR_DOMAIN_EVENT_UNDEFINED:
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if (detail == VIR_DOMAIN_EVENT_UNDEFINED_REMOVED)
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ret = "Removed";
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break;
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case VIR_DOMAIN_EVENT_STARTED:
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switch (detail) {
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case VIR_DOMAIN_EVENT_STARTED_BOOTED:
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ret = "Booted";
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break;
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case VIR_DOMAIN_EVENT_STARTED_MIGRATED:
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ret = "Migrated";
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break;
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case VIR_DOMAIN_EVENT_STARTED_RESTORED:
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ret = "Restored";
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break;
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case VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT:
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ret = "Snapshot";
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break;
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}
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break;
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case VIR_DOMAIN_EVENT_SUSPENDED:
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switch (detail) {
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case VIR_DOMAIN_EVENT_SUSPENDED_PAUSED:
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ret = "Paused";
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break;
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case VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED:
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ret = "Migrated";
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break;
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case VIR_DOMAIN_EVENT_SUSPENDED_IOERROR:
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ret = "I/O Error";
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break;
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case VIR_DOMAIN_EVENT_SUSPENDED_WATCHDOG:
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ret = "Watchdog";
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break;
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case VIR_DOMAIN_EVENT_SUSPENDED_RESTORED:
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ret = "Restored";
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break;
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case VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT:
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ret = "Snapshot";
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break;
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}
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break;
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case VIR_DOMAIN_EVENT_RESUMED:
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switch (detail) {
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case VIR_DOMAIN_EVENT_RESUMED_UNPAUSED:
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ret = "Unpaused";
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break;
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case VIR_DOMAIN_EVENT_RESUMED_MIGRATED:
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ret = "Migrated";
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break;
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case VIR_DOMAIN_EVENT_RESUMED_FROM_SNAPSHOT:
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ret = "Snapshot";
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break;
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}
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break;
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case VIR_DOMAIN_EVENT_STOPPED:
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switch (detail) {
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case VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN:
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ret = "Shutdown";
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break;
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case VIR_DOMAIN_EVENT_STOPPED_DESTROYED:
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ret = "Destroyed";
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break;
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case VIR_DOMAIN_EVENT_STOPPED_CRASHED:
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ret = "Crashed";
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break;
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case VIR_DOMAIN_EVENT_STOPPED_MIGRATED:
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ret = "Migrated";
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break;
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case VIR_DOMAIN_EVENT_STOPPED_SAVED:
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ret = "Failed";
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break;
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case VIR_DOMAIN_EVENT_STOPPED_FAILED:
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ret = "Failed";
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break;
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case VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT:
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ret = "Snapshot";
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break;
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}
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break;
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}
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return ret;
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}
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static int myDomainEventCallback1(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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int event,
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int detail,
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void *opaque ATTRIBUTE_UNUSED)
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{
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printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom), eventToString(event),
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eventDetailToString(event, detail));
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return 0;
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}
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static int myDomainEventCallback2(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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int event,
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int detail,
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void *opaque ATTRIBUTE_UNUSED)
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{
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printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom), eventToString(event),
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eventDetailToString(event, detail));
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return 0;
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}
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static int myDomainEventRebootCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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void *opaque ATTRIBUTE_UNUSED)
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{
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printf("%s EVENT: Domain %s(%d) rebooted\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom));
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return 0;
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}
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static int myDomainEventRTCChangeCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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long long offset,
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void *opaque ATTRIBUTE_UNUSED)
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{
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char *str = NULL;
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/* HACK: use asprintf since we have gnulib's wrapper for %lld on Win32
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* but don't have a printf() replacement with %lld */
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if (asprintf(&str, "%s EVENT: Domain %s(%d) rtc change %lld\n",
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__func__, virDomainGetName(dom),
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virDomainGetID(dom), offset) < 0)
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return 0;
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printf("%s", str);
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free(str);
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return 0;
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}
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static int myDomainEventWatchdogCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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int action,
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void *opaque ATTRIBUTE_UNUSED)
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{
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printf("%s EVENT: Domain %s(%d) watchdog action=%d\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom), action);
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return 0;
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}
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static int myDomainEventIOErrorCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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const char *srcPath,
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const char *devAlias,
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int action,
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void *opaque ATTRIBUTE_UNUSED)
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{
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printf("%s EVENT: Domain %s(%d) io error path=%s alias=%s action=%d\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom), srcPath, devAlias, action);
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return 0;
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}
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static int myDomainEventGraphicsCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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int phase,
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virDomainEventGraphicsAddressPtr local,
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virDomainEventGraphicsAddressPtr remote,
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const char *authScheme,
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virDomainEventGraphicsSubjectPtr subject,
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void *opaque ATTRIBUTE_UNUSED)
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{
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int i;
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printf("%s EVENT: Domain %s(%d) graphics ", __func__, virDomainGetName(dom),
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virDomainGetID(dom));
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switch (phase) {
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case VIR_DOMAIN_EVENT_GRAPHICS_CONNECT:
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printf("connected ");
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break;
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case VIR_DOMAIN_EVENT_GRAPHICS_INITIALIZE:
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printf("initialized ");
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break;
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case VIR_DOMAIN_EVENT_GRAPHICS_DISCONNECT:
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printf("disconnected ");
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break;
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}
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printf("local: family=%d node=%s service=%s ",
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local->family, local->node, local->service);
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printf("remote: family=%d node=%s service=%s ",
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remote->family, remote->node, remote->service);
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printf("auth: %s ", authScheme);
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for (i = 0 ; i < subject->nidentity ; i++) {
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printf(" identity: %s=%s",
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subject->identities[i].type,
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subject->identities[i].name);
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}
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printf("\n");
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return 0;
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}
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static int myDomainEventControlErrorCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
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virDomainPtr dom,
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void *opaque ATTRIBUTE_UNUSED)
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{
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printf("%s EVENT: Domain %s(%d) control error\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom));
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return 0;
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}
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static void myFreeFunc(void *opaque)
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{
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char *str = opaque;
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printf("%s: Freeing [%s]\n", __func__, str);
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free(str);
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}
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/* main test functions */
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void usage(const char *pname)
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{
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printf("%s uri\n", pname);
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}
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int run = 1;
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static void stop(int sig)
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{
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printf("Exiting on signal %d\n", sig);
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run = 0;
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}
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int main(int argc, char **argv)
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{
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int callback1ret = -1;
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int callback2ret = -1;
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int callback3ret = -1;
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int callback4ret = -1;
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int callback5ret = -1;
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int callback6ret = -1;
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int callback7ret = -1;
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int callback8ret = -1;
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struct sigaction action_stop;
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memset(&action_stop, 0, sizeof action_stop);
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action_stop.sa_handler = stop;
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if (argc > 1 && STREQ(argv[1], "--help")) {
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usage(argv[0]);
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return -1;
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}
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virEventRegisterDefaultImpl();
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virConnectPtr dconn = NULL;
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dconn = virConnectOpenReadOnly (argv[1] ? argv[1] : NULL);
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if (!dconn) {
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printf("error opening\n");
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return -1;
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}
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sigaction(SIGTERM, &action_stop, NULL);
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sigaction(SIGINT, &action_stop, NULL);
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VIR_DEBUG("Registering domain event cbs");
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/* Add 2 callbacks to prove this works with more than just one */
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callback1ret = virConnectDomainEventRegister(dconn, myDomainEventCallback1,
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strdup("callback 1"), myFreeFunc);
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callback2ret = virConnectDomainEventRegisterAny(dconn,
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NULL,
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VIR_DOMAIN_EVENT_ID_LIFECYCLE,
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VIR_DOMAIN_EVENT_CALLBACK(myDomainEventCallback2),
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strdup("callback 2"), myFreeFunc);
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callback3ret = virConnectDomainEventRegisterAny(dconn,
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NULL,
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VIR_DOMAIN_EVENT_ID_REBOOT,
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VIR_DOMAIN_EVENT_CALLBACK(myDomainEventRebootCallback),
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strdup("callback reboot"), myFreeFunc);
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callback4ret = virConnectDomainEventRegisterAny(dconn,
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NULL,
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VIR_DOMAIN_EVENT_ID_RTC_CHANGE,
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VIR_DOMAIN_EVENT_CALLBACK(myDomainEventRTCChangeCallback),
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strdup("callback rtcchange"), myFreeFunc);
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callback5ret = virConnectDomainEventRegisterAny(dconn,
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NULL,
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VIR_DOMAIN_EVENT_ID_WATCHDOG,
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VIR_DOMAIN_EVENT_CALLBACK(myDomainEventWatchdogCallback),
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strdup("callback watchdog"), myFreeFunc);
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callback6ret = virConnectDomainEventRegisterAny(dconn,
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NULL,
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VIR_DOMAIN_EVENT_ID_IO_ERROR,
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VIR_DOMAIN_EVENT_CALLBACK(myDomainEventIOErrorCallback),
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strdup("callback io error"), myFreeFunc);
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callback7ret = virConnectDomainEventRegisterAny(dconn,
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NULL,
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VIR_DOMAIN_EVENT_ID_GRAPHICS,
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VIR_DOMAIN_EVENT_CALLBACK(myDomainEventGraphicsCallback),
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strdup("callback graphics"), myFreeFunc);
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callback8ret = virConnectDomainEventRegisterAny(dconn,
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NULL,
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VIR_DOMAIN_EVENT_ID_CONTROL_ERROR,
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VIR_DOMAIN_EVENT_CALLBACK(myDomainEventControlErrorCallback),
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strdup("callback control error"), myFreeFunc);
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if ((callback1ret != -1) &&
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(callback2ret != -1) &&
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(callback3ret != -1) &&
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(callback4ret != -1) &&
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(callback5ret != -1) &&
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(callback6ret != -1) &&
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(callback7ret != -1)) {
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while (run) {
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if (virEventRunDefaultImpl() < 0) {
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virErrorPtr err = virGetLastError();
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fprintf(stderr, "Failed to run event loop: %s\n",
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err && err->message ? err->message : "Unknown error");
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}
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}
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VIR_DEBUG("Deregistering event handlers");
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virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
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virConnectDomainEventDeregisterAny(dconn, callback2ret);
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virConnectDomainEventDeregisterAny(dconn, callback3ret);
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virConnectDomainEventDeregisterAny(dconn, callback4ret);
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virConnectDomainEventDeregisterAny(dconn, callback5ret);
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virConnectDomainEventDeregisterAny(dconn, callback6ret);
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virConnectDomainEventDeregisterAny(dconn, callback7ret);
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if (callback8ret != -1)
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virConnectDomainEventDeregisterAny(dconn, callback8ret);
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}
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VIR_DEBUG("Closing connection");
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if (dconn && virConnectClose(dconn) < 0) {
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printf("error closing\n");
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}
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printf("done\n");
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return 0;
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}
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