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qemu: Add support for job phase

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Asynchronous jobs may take long time to finish and may consist of
several phases which we need to now about to help with recovery/rollback
after libvirtd restarts.
This commit is contained in:
Jiri Denemark 2011-06-06 10:30:54 +02:00
parent e6704af1fc
commit 5b2d0bbc4c
2 changed files with 83 additions and 1 deletions
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75
src/qemu/qemu_domain.c
View File

@ -65,6 +65,46 @@ VIR_ENUM_IMPL(qemuDomainAsyncJob, QEMU_ASYNC_JOB_LAST,
);
const char *
qemuDomainAsyncJobPhaseToString(enum qemuDomainAsyncJob job,
int phase ATTRIBUTE_UNUSED)
{
switch (job) {
case QEMU_ASYNC_JOB_MIGRATION_OUT:
case QEMU_ASYNC_JOB_MIGRATION_IN:
case QEMU_ASYNC_JOB_SAVE:
case QEMU_ASYNC_JOB_DUMP:
case QEMU_ASYNC_JOB_NONE:
case QEMU_ASYNC_JOB_LAST:
; /* fall through */
}
return "none";
}
int
qemuDomainAsyncJobPhaseFromString(enum qemuDomainAsyncJob job,
const char *phase)
{
if (!phase)
return 0;
switch (job) {
case QEMU_ASYNC_JOB_MIGRATION_OUT:
case QEMU_ASYNC_JOB_MIGRATION_IN:
case QEMU_ASYNC_JOB_SAVE:
case QEMU_ASYNC_JOB_DUMP:
case QEMU_ASYNC_JOB_NONE:
case QEMU_ASYNC_JOB_LAST:
; /* fall through */
}
if (STREQ(phase, "none"))
return 0;
else
return -1;
}
static void qemuDomainEventDispatchFunc(virConnectPtr conn,
virDomainEventPtr event,
virConnectDomainEventGenericCallback cb,
@ -135,6 +175,7 @@ qemuDomainObjResetAsyncJob(qemuDomainObjPrivatePtr priv)
struct qemuDomainJobObj *job = &priv->job;
job->asyncJob = QEMU_ASYNC_JOB_NONE;
job->phase = 0;
job->mask = DEFAULT_JOB_MASK;
job->start = 0;
memset(&job->info, 0, sizeof(job->info));
@ -151,6 +192,7 @@ qemuDomainObjRestoreJob(virDomainObjPtr obj,
memset(job, 0, sizeof(*job));
job->active = priv->job.active;
job->asyncJob = priv->job.asyncJob;
job->phase = priv->job.phase;
qemuDomainObjResetJob(priv);
qemuDomainObjResetAsyncJob(priv);
@ -249,9 +291,15 @@ static int qemuDomainObjPrivateXMLFormat(virBufferPtr buf, void *data)
virBufferAsprintf(buf, " <lockstate>%s</lockstate>\n", priv->lockState);
if (priv->job.active || priv->job.asyncJob) {
virBufferAsprintf(buf, " <job type='%s' async='%s'/>\n",
virBufferAsprintf(buf, " <job type='%s' async='%s'",
qemuDomainJobTypeToString(priv->job.active),
qemuDomainAsyncJobTypeToString(priv->job.asyncJob));
if (priv->job.phase) {
virBufferAsprintf(buf, " phase='%s'",
qemuDomainAsyncJobPhaseToString(
priv->job.asyncJob, priv->job.phase));
}
virBufferAddLit(buf, "/>\n");
}
return 0;
@ -384,6 +432,17 @@ static int qemuDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt, void *data)
}
VIR_FREE(tmp);
priv->job.asyncJob = async;
if ((tmp = virXPathString("string(./job[1]/@phase)", ctxt))) {
priv->job.phase = qemuDomainAsyncJobPhaseFromString(async, tmp);
if (priv->job.phase < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown job phase %s"), tmp);
VIR_FREE(tmp);
goto error;
}
VIR_FREE(tmp);
}
}
return 0;
@ -594,6 +653,20 @@ qemuDomainObjSaveJob(struct qemud_driver *driver, virDomainObjPtr obj)
VIR_WARN("Failed to save status on vm %s", obj->def->name);
}
void
qemuDomainObjSetJobPhase(struct qemud_driver *driver,
virDomainObjPtr obj,
int phase)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
if (!priv->job.asyncJob)
return;
priv->job.phase = phase;
qemuDomainObjSaveJob(driver, obj);
}
void
qemuDomainObjSetAsyncJobMask(virDomainObjPtr obj,
unsigned long long allowedJobs)

9
src/qemu/qemu_domain.h
View File

@ -97,6 +97,7 @@ struct qemuDomainJobObj {
virCond asyncCond; /* Use to coordinate with async jobs */
enum qemuDomainAsyncJob asyncJob; /* Currently active async job */
int phase; /* Job phase (mainly for migrations) */
unsigned long long mask; /* Jobs allowed during async job */
unsigned long long start; /* When the async job started */
virDomainJobInfo info; /* Async job progress data */
@ -140,6 +141,11 @@ struct qemuDomainWatchdogEvent
int action;
};
const char *qemuDomainAsyncJobPhaseToString(enum qemuDomainAsyncJob job,
int phase);
int qemuDomainAsyncJobPhaseFromString(enum qemuDomainAsyncJob job,
const char *phase);
void qemuDomainEventFlush(int timer ATTRIBUTE_UNUSED, void *opaque);
/* driver must be locked before calling */
@ -182,6 +188,9 @@ void qemuDomainObjEndNestedJob(struct qemud_driver *driver,
virDomainObjPtr obj);
void qemuDomainObjSaveJob(struct qemud_driver *driver, virDomainObjPtr obj);
void qemuDomainObjSetJobPhase(struct qemud_driver *driver,
virDomainObjPtr obj,
int phase);
void qemuDomainObjSetAsyncJobMask(virDomainObjPtr obj,
unsigned long long allowedJobs);
void qemuDomainObjRestoreJob(virDomainObjPtr obj,