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qemu: Don't leave beingDestroyed=true on inactive domain

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Recent commit v10.4.0-87-gd9935a5c4f made a reasonable change to only
reset beingDestroyed back to false when vm->def->id is reset to make
sure other code can detect a domain is (about to become) inactive. It
even added a comment saying any caller of qemuProcessBeginStopJob is
supposed to call qemuProcessStop to clear beingDestroyed. But not every
caller really does so because they first call qemuProcessBeginStopJob
and then check whether a domain is still running. If not the
qemuProcessStop call is skipped leaving beingDestroyed=true. In case of
a persistent domain this may block incoming migrations of such domain as
the migration code would think the domain died unexpectedly (even though
it's still running).

The qemuProcessBeginStopJob function is a wrapper around
virDomainObjBeginJob, but virDomainObjEndJob was used directly for
cleanup. This patch introduces a new qemuProcessEndStopJob wrapper
around virDomainObjEndJob to properly undo everything
qemuProcessBeginStopJob did.

https://issues.redhat.com/browse/RHEL-43309

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Jiri Denemark 2024-07-11 13:49:09 +02:00
parent c9fa43c48c
commit bec903cae8
3 changed files with 19 additions and 6 deletions
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4
src/qemu/qemu_driver.c
View File

@ -2102,7 +2102,7 @@ qemuDomainDestroyFlags(virDomainPtr dom,
endjob:
if (ret == 0)
qemuDomainRemoveInactive(driver, vm, 0, false);
virDomainObjEndJob(vm);
qemuProcessEndStopJob(vm);
cleanup:
virDomainObjEndAPI(&vm);
@ -3888,7 +3888,7 @@ processMonitorEOFEvent(virQEMUDriver *driver,
endjob:
qemuDomainRemoveInactive(driver, vm, 0, false);
virDomainObjEndJob(vm);
qemuProcessEndStopJob(vm);
}

20
src/qemu/qemu_process.c
View File

@ -8421,7 +8421,8 @@ qemuProcessKill(virDomainObj *vm, unsigned int flags)
* qemuProcessBeginStopJob:
*
* Stop all current jobs by killing the domain and start a new one for
* qemuProcessStop.
* qemuProcessStop. The caller has to make sure qemuProcessEndStopJob is
* called to properly cleanup the job.
*/
int
qemuProcessBeginStopJob(virDomainObj *vm,
@ -8448,8 +8449,9 @@ qemuProcessBeginStopJob(virDomainObj *vm,
goto error;
/* priv->beingDestroyed is deliberately left set to 'true' here. Caller
* is supposed to call qemuProcessStop, which will reset it after
* 'vm->def->id' is set to -1 */
* is supposed to call qemuProcessStop (which will reset it after
* 'vm->def->id' is set to -1) and/or qemuProcessEndStopJob to do proper
* cleanup. */
return 0;
error:
@ -8458,6 +8460,16 @@ qemuProcessBeginStopJob(virDomainObj *vm,
}
void
qemuProcessEndStopJob(virDomainObj *vm)
{
if (!virDomainObjIsActive(vm))
QEMU_DOMAIN_PRIVATE(vm)->beingDestroyed = false;
virDomainObjEndJob(vm);
}
void qemuProcessStop(virQEMUDriver *driver,
virDomainObj *vm,
virDomainShutoffReason reason,
@ -8800,7 +8812,7 @@ qemuProcessAutoDestroy(virDomainObj *dom,
qemuDomainRemoveInactive(driver, dom, 0, false);
virDomainObjEndJob(dom);
qemuProcessEndStopJob(dom);
virObjectEventStateQueue(driver->domainEventState, event);
}

1
src/qemu/qemu_process.h
View File

@ -169,6 +169,7 @@ typedef enum {
int qemuProcessBeginStopJob(virDomainObj *vm,
virDomainJob job,
bool forceKill);
void qemuProcessEndStopJob(virDomainObj *vm);
void qemuProcessStop(virQEMUDriver *driver,
virDomainObj *vm,
virDomainShutoffReason reason,