mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-09-19 22:21:27 +00:00
6bae6677c8
Convert the domain events example program to use the new events APIs for one of its callback registrations to demo the new API and interoperability with the old API. * examples/domain-events/events-c/event-test.c: Convert to new events API
387 lines
11 KiB
C
387 lines
11 KiB
C
#include <config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
|
|
#if HAVE_SYS_POLL_H
|
|
# include <sys/types.h>
|
|
# include <sys/poll.h>
|
|
# include <libvirt/libvirt.h>
|
|
|
|
# define DEBUG0(fmt) printf("%s:%d :: " fmt "\n", \
|
|
__func__, __LINE__)
|
|
# define DEBUG(fmt, ...) printf("%s:%d: " fmt "\n", \
|
|
__func__, __LINE__, __VA_ARGS__)
|
|
# define STREQ(a,b) (strcmp(a,b) == 0)
|
|
|
|
# ifndef ATTRIBUTE_UNUSED
|
|
# define ATTRIBUTE_UNUSED __attribute__((__unused__))
|
|
# endif
|
|
|
|
/* handle globals */
|
|
int h_fd = 0;
|
|
virEventHandleType h_event = 0;
|
|
virEventHandleCallback h_cb = NULL;
|
|
virFreeCallback h_ff = NULL;
|
|
void *h_opaque = NULL;
|
|
|
|
/* timeout globals */
|
|
# define TIMEOUT_MS 1000
|
|
int t_active = 0;
|
|
int t_timeout = -1;
|
|
virEventTimeoutCallback t_cb = NULL;
|
|
virFreeCallback t_ff = NULL;
|
|
void *t_opaque = NULL;
|
|
|
|
|
|
/* Prototypes */
|
|
const char *eventToString(int event);
|
|
int myEventAddHandleFunc (int fd, int event,
|
|
virEventHandleCallback cb,
|
|
void *opaque,
|
|
virFreeCallback ff);
|
|
void myEventUpdateHandleFunc(int watch, int event);
|
|
int myEventRemoveHandleFunc(int watch);
|
|
|
|
int myEventAddTimeoutFunc(int timeout,
|
|
virEventTimeoutCallback cb,
|
|
void *opaque,
|
|
virFreeCallback ff);
|
|
void myEventUpdateTimeoutFunc(int timer, int timout);
|
|
int myEventRemoveTimeoutFunc(int timer);
|
|
|
|
int myEventHandleTypeToPollEvent(virEventHandleType events);
|
|
virEventHandleType myPollEventToEventHandleType(int events);
|
|
|
|
void usage(const char *pname);
|
|
|
|
/* Callback functions */
|
|
|
|
const char *eventToString(int event) {
|
|
const char *ret = "";
|
|
switch(event) {
|
|
case VIR_DOMAIN_EVENT_DEFINED:
|
|
ret ="Defined";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_UNDEFINED:
|
|
ret ="Undefined";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STARTED:
|
|
ret ="Started";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_SUSPENDED:
|
|
ret ="Suspended";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_RESUMED:
|
|
ret ="Resumed";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STOPPED:
|
|
ret ="Stopped";
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const char *eventDetailToString(int event, int detail) {
|
|
const char *ret = "";
|
|
switch(event) {
|
|
case VIR_DOMAIN_EVENT_DEFINED:
|
|
if (detail == VIR_DOMAIN_EVENT_DEFINED_ADDED)
|
|
ret = "Added";
|
|
else if (detail == VIR_DOMAIN_EVENT_DEFINED_UPDATED)
|
|
ret = "Updated";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_UNDEFINED:
|
|
if (detail == VIR_DOMAIN_EVENT_UNDEFINED_REMOVED)
|
|
ret = "Removed";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STARTED:
|
|
switch (detail) {
|
|
case VIR_DOMAIN_EVENT_STARTED_BOOTED:
|
|
ret = "Booted";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STARTED_MIGRATED:
|
|
ret = "Migrated";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STARTED_RESTORED:
|
|
ret = "Restored";
|
|
break;
|
|
}
|
|
break;
|
|
case VIR_DOMAIN_EVENT_SUSPENDED:
|
|
if (detail == VIR_DOMAIN_EVENT_SUSPENDED_PAUSED)
|
|
ret = "Paused";
|
|
else if (detail == VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED)
|
|
ret = "Migrated";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_RESUMED:
|
|
if (detail == VIR_DOMAIN_EVENT_RESUMED_UNPAUSED)
|
|
ret = "Unpaused";
|
|
else if (detail == VIR_DOMAIN_EVENT_RESUMED_MIGRATED)
|
|
ret = "Migrated";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STOPPED:
|
|
switch (detail) {
|
|
case VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN:
|
|
ret = "Shutdown";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STOPPED_DESTROYED:
|
|
ret = "Destroyed";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STOPPED_CRASHED:
|
|
ret = "Crashed";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STOPPED_MIGRATED:
|
|
ret = "Migrated";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STOPPED_SAVED:
|
|
ret = "Failed";
|
|
break;
|
|
case VIR_DOMAIN_EVENT_STOPPED_FAILED:
|
|
ret = "Failed";
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int myDomainEventCallback1(virConnectPtr conn ATTRIBUTE_UNUSED,
|
|
virDomainPtr dom,
|
|
int event,
|
|
int detail,
|
|
void *opaque ATTRIBUTE_UNUSED)
|
|
{
|
|
printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
|
|
virDomainGetID(dom), eventToString(event),
|
|
eventDetailToString(event, detail));
|
|
return 0;
|
|
}
|
|
|
|
static int myDomainEventCallback2(virConnectPtr conn ATTRIBUTE_UNUSED,
|
|
virDomainPtr dom,
|
|
int event,
|
|
int detail,
|
|
void *opaque ATTRIBUTE_UNUSED)
|
|
{
|
|
printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
|
|
virDomainGetID(dom), eventToString(event),
|
|
eventDetailToString(event, detail));
|
|
return 0;
|
|
}
|
|
|
|
static void myFreeFunc(void *opaque)
|
|
{
|
|
char *str = opaque;
|
|
printf("%s: Freeing [%s]\n", __func__, str);
|
|
free(str);
|
|
}
|
|
|
|
|
|
/* EventImpl Functions */
|
|
int myEventHandleTypeToPollEvent(virEventHandleType events)
|
|
{
|
|
int ret = 0;
|
|
if(events & VIR_EVENT_HANDLE_READABLE)
|
|
ret |= POLLIN;
|
|
if(events & VIR_EVENT_HANDLE_WRITABLE)
|
|
ret |= POLLOUT;
|
|
if(events & VIR_EVENT_HANDLE_ERROR)
|
|
ret |= POLLERR;
|
|
if(events & VIR_EVENT_HANDLE_HANGUP)
|
|
ret |= POLLHUP;
|
|
return ret;
|
|
}
|
|
|
|
virEventHandleType myPollEventToEventHandleType(int events)
|
|
{
|
|
virEventHandleType ret = 0;
|
|
if(events & POLLIN)
|
|
ret |= VIR_EVENT_HANDLE_READABLE;
|
|
if(events & POLLOUT)
|
|
ret |= VIR_EVENT_HANDLE_WRITABLE;
|
|
if(events & POLLERR)
|
|
ret |= VIR_EVENT_HANDLE_ERROR;
|
|
if(events & POLLHUP)
|
|
ret |= VIR_EVENT_HANDLE_HANGUP;
|
|
return ret;
|
|
}
|
|
|
|
int myEventAddHandleFunc(int fd, int event,
|
|
virEventHandleCallback cb,
|
|
void *opaque,
|
|
virFreeCallback ff)
|
|
{
|
|
DEBUG("Add handle %d %d %p %p", fd, event, cb, opaque);
|
|
h_fd = fd;
|
|
h_event = myEventHandleTypeToPollEvent(event);
|
|
h_cb = cb;
|
|
h_ff = ff;
|
|
h_opaque = opaque;
|
|
return 0;
|
|
}
|
|
|
|
void myEventUpdateHandleFunc(int fd, int event)
|
|
{
|
|
DEBUG("Updated Handle %d %d", fd, event);
|
|
h_event = myEventHandleTypeToPollEvent(event);
|
|
return;
|
|
}
|
|
|
|
int myEventRemoveHandleFunc(int fd)
|
|
{
|
|
DEBUG("Removed Handle %d", fd);
|
|
h_fd = 0;
|
|
if (h_ff)
|
|
(h_ff)(h_opaque);
|
|
return 0;
|
|
}
|
|
|
|
int myEventAddTimeoutFunc(int timeout,
|
|
virEventTimeoutCallback cb,
|
|
void *opaque,
|
|
virFreeCallback ff)
|
|
{
|
|
DEBUG("Adding Timeout %d %p %p", timeout, cb, opaque);
|
|
t_active = 1;
|
|
t_timeout = timeout;
|
|
t_cb = cb;
|
|
t_ff = ff;
|
|
t_opaque = opaque;
|
|
return 0;
|
|
}
|
|
|
|
void myEventUpdateTimeoutFunc(int timer ATTRIBUTE_UNUSED, int timeout)
|
|
{
|
|
/*DEBUG("Timeout updated %d %d", timer, timeout);*/
|
|
t_timeout = timeout;
|
|
}
|
|
|
|
int myEventRemoveTimeoutFunc(int timer)
|
|
{
|
|
DEBUG("Timeout removed %d", timer);
|
|
t_active = 0;
|
|
if (t_ff)
|
|
(t_ff)(t_opaque);
|
|
return 0;
|
|
}
|
|
|
|
/* main test functions */
|
|
|
|
void usage(const char *pname)
|
|
{
|
|
printf("%s uri\n", pname);
|
|
}
|
|
|
|
int run = 1;
|
|
|
|
static void stop(int sig)
|
|
{
|
|
printf("Exiting on signal %d\n", sig);
|
|
run = 0;
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int sts;
|
|
int callback1ret = -1;
|
|
int callback2ret = -1;
|
|
|
|
struct sigaction action_stop = {
|
|
.sa_handler = stop
|
|
};
|
|
|
|
if(argc > 1 && STREQ(argv[1],"--help")) {
|
|
usage(argv[0]);
|
|
return -1;
|
|
}
|
|
|
|
virEventRegisterImpl( myEventAddHandleFunc,
|
|
myEventUpdateHandleFunc,
|
|
myEventRemoveHandleFunc,
|
|
myEventAddTimeoutFunc,
|
|
myEventUpdateTimeoutFunc,
|
|
myEventRemoveTimeoutFunc);
|
|
|
|
virConnectPtr dconn = NULL;
|
|
dconn = virConnectOpenReadOnly (argv[1] ? argv[1] : NULL);
|
|
if (!dconn) {
|
|
printf("error opening\n");
|
|
return -1;
|
|
}
|
|
|
|
sigaction(SIGTERM, &action_stop, NULL);
|
|
sigaction(SIGINT, &action_stop, NULL);
|
|
|
|
DEBUG0("Registering domain event cbs");
|
|
|
|
/* Add 2 callbacks to prove this works with more than just one */
|
|
callback1ret = virConnectDomainEventRegister(dconn, myDomainEventCallback1,
|
|
strdup("callback 1"), myFreeFunc);
|
|
callback2ret = virConnectDomainEventRegisterAny(dconn,
|
|
NULL,
|
|
VIR_DOMAIN_EVENT_ID_LIFECYCLE,
|
|
VIR_DOMAIN_EVENT_CALLBACK(myDomainEventCallback2),
|
|
strdup("callback 2"), myFreeFunc);
|
|
|
|
if ((callback1ret != -1) &&
|
|
(callback2ret != -1)) {
|
|
while(run) {
|
|
struct pollfd pfd = { .fd = h_fd,
|
|
.events = h_event,
|
|
.revents = 0};
|
|
|
|
sts = poll(&pfd, 1, TIMEOUT_MS);
|
|
|
|
/* if t_timeout < 0 then t_cb must not be called */
|
|
if (t_cb && t_active && t_timeout >= 0) {
|
|
t_cb(t_timeout,t_opaque);
|
|
}
|
|
|
|
if (sts == 0) {
|
|
/* DEBUG0("Poll timeout"); */
|
|
continue;
|
|
}
|
|
if (sts < 0 ) {
|
|
DEBUG0("Poll failed");
|
|
continue;
|
|
}
|
|
if ( pfd.revents & POLLHUP ) {
|
|
DEBUG0("Reset by peer");
|
|
return -1;
|
|
}
|
|
|
|
if(h_cb) {
|
|
h_cb(0,
|
|
h_fd,
|
|
myPollEventToEventHandleType(pfd.revents & h_event),
|
|
h_opaque);
|
|
}
|
|
|
|
}
|
|
|
|
DEBUG0("Deregistering event handlers");
|
|
virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
|
|
virConnectDomainEventDeregisterAny(dconn, callback2ret);
|
|
|
|
}
|
|
|
|
DEBUG0("Closing connection");
|
|
if( dconn && virConnectClose(dconn)<0 ) {
|
|
printf("error closing\n");
|
|
}
|
|
|
|
printf("done\n");
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
int main(void) {
|
|
printf("event-test program not available without sys/poll.h support\n");
|
|
return 1;
|
|
}
|
|
#endif
|