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startupPolicy: Emit event on disk source dropping

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If a disk source gets dropped because it is not accessible,
mgmt application might want to be informed about this. Therefore
we need to emit an event. The event presented in this patch
is however a bit superset of what written above. The reason is simple:
an intention to be easily expanded, e.g. on 'user ejected disk
in guest' events. Therefore, callback gets source string and disk alias
(which should be unique among a domain) and reason (an integer);
This commit is contained in:
Michal Privoznik
2011-10-18 16:15:42 +02:00
parent 12ba43222d
commit baf2ff7e90
14 changed files with 337 additions and 9 deletions
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29
examples/domain-events/events-c/event-test.c
View File

@@ -285,6 +285,25 @@ static int myDomainEventControlErrorCallback(virConnectPtr conn ATTRIBUTE_UNUSED
}
const char *diskChangeReasonStrings[] = {
"startupPolicy", /* 0 */
/* add new reason here */
};
static int myDomainEventDiskChangeCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
virDomainPtr dom,
const char *oldSrcPath,
const char *newSrcPath,
const char *devAlias,
int reason,
void *opaque ATTRIBUTE_UNUSED)
{
printf("%s EVENT: Domain %s(%d) disk change oldSrcPath: %s newSrcPath: %s devAlias: %s reason: %s\n",
__func__, virDomainGetName(dom), virDomainGetID(dom),
oldSrcPath, newSrcPath, devAlias, diskChangeReasonStrings[reason]);
return 0;
}
static void myFreeFunc(void *opaque)
{
char *str = opaque;
@@ -319,6 +338,7 @@ int main(int argc, char **argv)
int callback6ret = -1;
int callback7ret = -1;
int callback8ret = -1;
int callback9ret = -1;
struct sigaction action_stop;
memset(&action_stop, 0, sizeof action_stop);
@@ -382,6 +402,11 @@ int main(int argc, char **argv)
VIR_DOMAIN_EVENT_ID_CONTROL_ERROR,
VIR_DOMAIN_EVENT_CALLBACK(myDomainEventControlErrorCallback),
strdup("callback control error"), myFreeFunc);
callback9ret = virConnectDomainEventRegisterAny(dconn,
NULL,
VIR_DOMAIN_EVENT_ID_DISK_CHANGE,
VIR_DOMAIN_EVENT_CALLBACK(myDomainEventDiskChangeCallback),
strdup("disk change"), myFreeFunc);
if ((callback1ret != -1) &&
(callback2ret != -1) &&
@@ -389,7 +414,8 @@ int main(int argc, char **argv)
(callback4ret != -1) &&
(callback5ret != -1) &&
(callback6ret != -1) &&
(callback7ret != -1)) {
(callback7ret != -1) &&
(callback9ret != -1)) {
while (run) {
if (virEventRunDefaultImpl() < 0) {
virErrorPtr err = virGetLastError();
@@ -406,6 +432,7 @@ int main(int argc, char **argv)
virConnectDomainEventDeregisterAny(dconn, callback5ret);
virConnectDomainEventDeregisterAny(dconn, callback6ret);
virConnectDomainEventDeregisterAny(dconn, callback7ret);
virConnectDomainEventDeregisterAny(dconn, callback9ret);
if (callback8ret != -1)
virConnectDomainEventDeregisterAny(dconn, callback8ret);
}

4
examples/domain-events/events-python/event-test.py
View File

@@ -469,6 +469,9 @@ def myDomainEventIOErrorCallback(conn, dom, srcpath, devalias, action, opaque):
def myDomainEventGraphicsCallback(conn, dom, phase, localAddr, remoteAddr, authScheme, subject, opaque):
print "myDomainEventGraphicsCallback: Domain %s(%s) %d %s" % (dom.name(), dom.ID(), phase, authScheme)
def myDomainEventDiskChangeCallback(conn, dom, oldSrcPath, newSrcPath, devAlias, reason, opaque):
print "myDomainEventDiskChangeCallback: Domain %s(%s) disk change oldSrcPath: %s newSrcPath: %s devAlias: %s reason: %s" % (
dom.name(), dom.ID(), oldSrcPath, newSrcPath, devAlias, reason)
def usage(out=sys.stderr):
print >>out, "usage: "+os.path.basename(sys.argv[0])+" [-hdl] [uri]"
print >>out, " uri will default to qemu:///system"
@@ -526,6 +529,7 @@ def main():
vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_IO_ERROR, myDomainEventIOErrorCallback, None)
vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_WATCHDOG, myDomainEventWatchdogCallback, None)
vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_GRAPHICS, myDomainEventGraphicsCallback, None)
vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_DISK_CHANGE, myDomainEventDiskChangeCallback, None)
# The rest of your app would go here normally, but for sake
# of demo we'll just go to sleep. The other option is to